HIGHWAYMASTER COMMUNICATIONS INC
424B1, 1997-11-05
RADIOTELEPHONE COMMUNICATIONS
Previous: YES ENTERTAINMENT CORP, S-3/A, 1997-11-05
Next: BAAN CO N V, 424B3, 1997-11-05



<PAGE>   1
                                                Filed pursuant to Rule 424(b)(1)
                                                   Registration Number 333-38361

PROSPECTUS

                       HIGHWAYMASTER COMMUNICATIONS, INC.

    OFFER TO EXCHANGE ITS SERIES B 13 3/4% SENIOR NOTES DUE 2005 FOR ANY AND
          ALL OF ITS OUTSTANDING SERIES A 13 3/4% SENIOR NOTES DUE 2005

THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON DECEMBER 
10, 1997, UNLESS EXTENDED.

         HighwayMaster Communications, Inc., a Delaware corporation (the
"Company" or "HighwayMaster"), hereby offers (the "Exchange Offer"), upon the
terms and conditions set forth in this Prospectus (the "Prospectus") and the
accompanying Letter of Transmittal (the "Letter of Transmittal"), to exchange
$1,000 principal amount of its Series B 13 3/4% Senior Notes due 2005 (the
"Exchange Notes"), which have 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, for each $1,000 principal amount of its outstanding
Series A 13 3/4% Senior Notes due 2005 (the "Old Notes" and, together with the
Exchange Notes, the "Notes"), of which $125,000,000 principal amount is
outstanding as of the date hereof. The form and terms of the Exchange Notes are
the same as the form and terms of the Old Notes (which they are intended to
replace) except that the Exchange Notes will bear a Series B designation and
have been registered under the Securities Act and, therefore, will not bear
legends restricting their transfer. See "The Exchange Offer." The Exchange Notes
will evidence the same debt as the Old Notes (which they are intended to
replace) and will be issued under and be entitled to the benefits of the
Indenture (the "Indenture") dated September 23, 1997 between the Company,
HighwayMaster Corporation ("HMC") and Texas Commerce Bank National Association,
as Trustee (the "Trustee"), governing the Notes. See "The Exchange Offer" and
"Description of Exchange Notes."

         Interest on the Exchange Notes will be payable semi-annually in arrears
on March 15 and September 15 of each year, commencing March 15, 1998. The
Exchange Notes will mature on September 15, 2005. The Company will not be
required to make any mandatory sinking fund or redemption payments with respect
to the Exchange Notes. The Exchange Notes will be redeemable at the option of
the Company at any time on or after September 15, 2001 at the redemption prices
set forth herein, plus accrued and unpaid interest and Liquidated Damages (as
defined herein), if any, to the redemption date. In addition, the Company will
be entitled, at any time on or before September 15, 2000, to redeem up to 35% of
the aggregate principal amount of the Exchange Notes with the proceeds of any
Equity Investment (as defined herein) at a redemption price equal to 113.75% of
the principal amount of the Exchange Notes, plus accrued and unpaid interest and
Liquidated Damages, if any, to the redemption date; provided, however, that at
least 65% of the aggregate principal amount of Notes initially issued remains
outstanding after giving effect to such redemption. See "Description of Exchange
Notes -- Optional Redemption."

         Upon the occurrence of a Change of Control (as defined herein), the
Company will be required to make an offer to repurchase all or any part of the
Exchange Notes at a price equal to 101% of the aggregate principal amount
thereof, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the date of repurchase. See "Description of Exchange Notes
- --Repurchase at the Option of Holders." (Cover text continued on next page.)

         SEE "RISK FACTORS" BEGINNING ON PAGE 18 FOR A DESCRIPTION OF CERTAIN 
RISKS TO BE CONSIDERED BY HOLDERS WHO TENDER THEIR NOTES IN THE EXCHANGE OFFER.

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
        THE 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 November 4, 1997

<PAGE>   2
        The Old Notes were issued by the Company in an offering (the "Units 
Offering") of 125,000 units (the "Units"), each consisting of $1,000 principal
amount of Old Notes and one warrant (a "Warrant") to purchase 6.566 shares of
common stock, par value $.01 per share ("Common Stock"), of the Company,
consummated on September 23, 1997. The Company used approximately $46.6
million of the proceeds from the sale of the Units in the Units Offering to
purchase a portfolio of U.S. government securities (the "Pledged Securities")
which will provide funds sufficient to pay in full when due the first six
scheduled interest payments on the Notes. The Pledged Securities have been
pledged as security for the repayment of principal of and interest on the Notes,
liquidated Damages, if any, and all other obligations under the Indenture.
 
         The Company is a holding company and substantially all of its
operations are conducted through HMC, its operating subsidiary. The obligations
of the Company under the Exchange Notes will be guaranteed (the "Subsidiary
Guarantees") on a senior unsecured basis by HMC and certain future subsidiaries
of the Company (collectively, the "Restricted Subsidiaries"). See "Description
of Exchange Notes -- Subsidiary Guarantees."

         The Exchange Notes and the Subsidiary Guarantees will be senior
obligations of the Company and the Restricted Subsidiaries, respectively, and
will rank pari passu in right of payment with all other senior indebtedness of
the Company and the Restricted Subsidiaries, as applicable, and will rank senior
in right of payment to any future subordinated indebtedness of the Company and
the Restricted Subsidiaries, as applicable. As of June 30, 1997, after giving
effect to the Units Offering, the Company on a consolidated basis had
outstanding indebtedness with a principal amount of $125.0 million ($120.8
million net of debt discount) and $9.2 million of other senior liabilities
(including trade payables). The Indenture permits the Company and its
subsidiaries to incur additional senior indebtedness, subject to certain
limitations. See "Description of Exchange Notes -- Ranking" and "-- Certain
Covenants."

         The Company will accept for exchange any and all Old Notes validly
tendered and not withdrawn prior to 5:00 p.m., New York time, on December 10,
1997, unless extended by the Company in its sole discretion (the "Expiration
Date"). Tenders of Old Notes may be withdrawn at any time prior to 5:00 p.m. on
the Expiration Date. The Exchange Offer is subject to certain customary
conditions. The Old Notes were sold by the Company on September 23, 1997 to the
Initial Purchasers (as defined herein) in the Units Offering, which was a
transaction effected without registration under the Securities Act in reliance
upon an exemption under the Securities Act. The Initial Purchasers subsequently
placed the Old Notes with qualified institutional buyers in reliance upon Rule
144A under the Securities Act and pursuant to offers and sales that occurred
outside the United States within the meaning of Regulation S under the
Securities Act. Accordingly, the Old Notes may not be reoffered, resold or
otherwise transferred unless registered under the Securities Act or unless an
applicable exemption from the registration requirements of the Securities Act
is available. The Exchange Notes are being offered hereunder in order to
satisfy the obligations of the Company under the Registration Rights Agreement
(as defined herein) entered into by the Company in connection with the offering
of the Old Notes. See "The Exchange Offer."

         Based on no-action letters issued by the staff of the Securities and
Exchange Commission (the "Commission") to third parties, the Company believes
the Exchange Notes issued pursuant to the Exchange Offer may be offered for
resale, resold and otherwise transferred by any holder 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 holder's business and
such holder has no arrangement or understanding with any person to participate
in the distribution of such Exchange Notes. See "The Exchange Offer -- Purpose
and Effect of the Exchange Offer" and "The Exchange Offer -- Resale of the
Exchange Notes." Each broker-dealer (a "Participating 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 Participating 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 Participating Broker-Dealer as a result of market-making activities or
other trading 




                                       ii

<PAGE>   3

activities. The Company has agreed that, for a period of 180 days after the
Expiration Date, it will make this Prospectus available to any Participating
Broker-Dealer for use in connection with any such resale. See "Plan of
Distribution."

         There has not previously been any public market for the Old Notes or
the Exchange Notes. Although the Initial Purchasers have informed the Company
that they currently intend to make a market in the Exchange Notes, they are not
obligated to do so, and any such market-making activities with respect to the
Exchange Notes may be discontinued at any time without notice. The Company does
not intend to list the Exchange Notes on any securities exchange or to seek
approval for quotation through any automated quotation system.

         Any Old Notes not tendered and accepted in the Exchange Offer will
remain outstanding and will be entitled to all the rights and will be subject to
the limitations applicable thereto under the Indenture. Following consummation
of the Exchange Offer, the holders of Old Notes will continue to be subject to
the existing restrictions upon transfer thereof and the Company will have no
further obligation to such holders to provide for registration under the
Securities Act of the Old Notes held by them. To the extent that Old Notes are
tendered and accepted in the Exchange Offer, a holder's ability to sell
untendered Old Notes could be adversely affected. See "Risk Factors -- Exchange
Offer Procedures" and "Exchange Offer -- Consequences of Failure to Exchange."

         The Exchange Notes will be available initially only in book-entry form.
The Company expects that the Exchange Notes issued pursuant to this Exchange
Offer will be issued in the form of one or more Global Notes (as defined
herein), which will be deposited with, or on behalf of, The Depository Trust
Company (the "Depositary") and registered in its name or in the name of Cede &
Co., its nominee. Beneficial interests in a Global Note representing the
Exchange Notes will be shown on, and transfers thereof will be effected through,
records maintained by the Depositary and its participants. After the initial
issuance of the Global Notes, Exchange Notes in certificated form will be issued
in exchange for a Global Note only on the terms set forth in the Indenture. See
"Description of Exchange Notes -- Book Entry, Delivery and Form."

         THIS PROSPECTUS AND THE RELATED LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION.  HOLDERS OF OLD NOTES ARE URGED TO READ THIS PROSPECTUS AND THE
RELATED LETTER OF TRANSMITTAL CAREFULLY BEFORE DECIDING WHETHER TO TENDER
THEIR OLD NOTES PURSUANT TO THE EXCHANGE OFFER.

         This Prospectus, together with the Letter of Transmittal, is being sent
to all registered holders of Old Notes as of November 4, 1997.

         The Company will not receive any cash proceeds from the issuance of the
Exchange Notes offered hereby. No dealer-manager is being used in connection
with this Exchange Offer. The Company will pay all expenses incurred by it
incident to the Exchange Offer. See "Use of Proceeds" and "Plan of
Distribution."

         The Exchange Offer is not being made to, nor will tenders be accepted
from or on behalf of, holders of the Old Notes in any jurisdiction in which the
making of the Exchange Offer or acceptance thereof would not be in compliance
with the laws of such jurisdiction or would otherwise not be in compliance with
any provision of any applicable security law.



                                       iii

<PAGE>   4
                              AVAILABLE INFORMATION

         The Company has filed with the Commission a Registration Statement on
Form S-4 (the "Exchange Offer Registration Statement," which term shall
encompass all amendments, exhibits and schedules thereto) pursuant to the
Securities Act, and the rules and regulations promulgated thereunder, covering
the Exchange Notes being offered hereby. This Prospectus does not contain all of
the information set forth in the Exchange Offer Registration Statement. For
further information with respect to the Company and the Exchange Offer,
reference is made to the Exchange Offer Registration Statement. Statements made
in this Prospectus as to the contents of any contract, agreement or other
document referred to are not necessarily complete. With respect to each such
contract, agreement or other document filed as an exhibit to the Exchange Offer
Registration Statement, reference is made to the exhibit for a more complete
description of the document or matter involved, and each such statement shall be
deemed qualified in its entirety by such reference.

         The Company is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in
accordance therewith, files reports, proxy statements and other information with
the Commission. Such reports, proxy statements and other information can be
inspected and copied at the public reference facilities maintained by the
Commission at Judiciary Plaza, Room 1024, 450 Fifth Street, N.W., Washington,
D.C. 20549; the Chicago Regional Office, Suite 1400, 500 West Madison Street,
Northwest Atrium Center, Chicago, Illinois 60661; and the New York Regional
Office, Suite 1300, 7 World Trade Center, New York, New York 10048. Copies of
such material also can be obtained from the Public Reference Section of the
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed
rates. The Commission maintains a Web site on the Internet that contains
reports, proxy and information statements and other information regarding
registrants that file electronically with the Commission. The address of this
site on the Internet is http://www.sec.gov.

         The Indenture provides that, whether or not required by the rules and
regulations of the Commission, so long as any Notes are outstanding, the Company
will furnish to the holders thereof (i) all quarterly and annual financial
information that would be required to be contained in a filing with the
Commission on Forms 10-Q and 10-K if the Company were required to file such
forms, including a "Management's Discussion and Analysis of Financial Condition
and Results of Operations" that describes the financial condition and results of
operations of the Company and its subsidiaries and, with respect to the annual
information only, a report thereon by the Company's certified independent
accountants and (ii) all current reports that would be required to be filed with
the Commission on Form 8-K if the Company were required to file such reports. In
addition, whether or not required by the rules and regulations of the
Commission, the Company will file a copy of all such information and reports
with the Commission for public availability (unless the Commission will not
accept such a filing) and make such information available to securities analysts
and prospective investors upon request. In addition, the Company has agreed
that, for so long as any Notes remain outstanding, it will furnish to the
holders thereof and to securities analysts and prospective investors, upon their
request, the information required to be delivered pursuant to Rule 144A(d)(4)
under the Securities Act.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The Company hereby incorporates by reference in this Prospectus the
following documents, which have been filed with the Commission pursuant to the
Exchange Act: (i) the Company's Annual Report on Form 10-K for the year ended
December 31, 1996; (ii) the Company's Quarterly Report on Form 10-Q for the
quarter ended March 31, 1997; and (iii) the Company's Quarterly Report on Form
10-Q for the quarter ended June 30, 1997.

         In addition, all documents filed by the Company with the Commission
pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the
date hereof and prior to the termination of the Exchange Offer shall be deemed
to be incorporated herein by reference and to be a part hereof from the
respective dates of the filing of such documents. Any statement contained in a
document incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or superseded for purposes of this Prospectus to the
extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed to be incorporated by reference herein
modifies or 




                                       iv

<PAGE>   5


supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Prospectus.

         The Company will provide without charge to each person, including any
beneficial owner, to whom a Prospectus is delivered, upon the written or oral
request of such person, a copy of any and all of the documents incorporated by
reference herein, other than certain exhibits to such documents (unless such
exhibits are specifically incorporated by reference into the documents that this
Prospectus incorporates). Such requests should be addressed to Wesley E.
Schlenker, General Counsel and Secretary, HighwayMaster Communications, Inc.,
16479 Dallas Parkway, Suite 710, Dallas, Texas 75248; telephone (972) 732-2500.

         DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS: THIS PROSPECTUS
INCLUDES "FORWARD-LOOKING STATEMENTS" WITHIN THE MEANING OF SECTION 27A OF THE
SECURITIES ACT AND SECTION 21E OF THE EXCHANGE ACT. ALL STATEMENTS OTHER THAN
STATEMENTS OF HISTORICAL FACTS INCLUDED IN THIS PROSPECTUS, INCLUDING WITHOUT
LIMITATION, CERTAIN STATEMENTS UNDER THE "PROSPECTUS SUMMARY," "MANAGEMENT'S
DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS" AND
"BUSINESS," MAY CONSTITUTE FORWARD-LOOKING STATEMENTS. ALTHOUGH THE COMPANY
BELIEVES THAT THE EXPECTATIONS REFLECTED IN SUCH FORWARD-LOOKING STATEMENTS ARE
REASONABLE, IT CAN GIVE NO ASSURANCE THAT SUCH EXPECTATIONS WILL PROVE TO BE
CORRECT. IMPORTANT FACTORS THAT COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY
FROM THE COMPANY'S EXPECTATIONS ("CAUTIONARY STATEMENTS") ARE DISCLOSED IN THIS
PROSPECTUS, INCLUDING WITHOUT LIMITATION IN CONJUNCTION WITH THE FORWARD-LOOKING
STATEMENTS INCLUDED IN THIS PROSPECTUS AND UNDER "RISK FACTORS." ALL SUBSEQUENT
WRITTEN AND ORAL FORWARD-LOOKING STATEMENTS ATTRIBUTABLE TO THE COMPANY OR
PERSONS ACTING ON ITS BEHALF ARE EXPRESSLY QUALIFIED IN THEIR ENTIRETY BY THE
CAUTIONARY STATEMENTS.

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




                                        v

<PAGE>   6
                               PROSPECTUS SUMMARY

         The following summary is qualified in its entirety by the more detailed
information and consolidated financial statements, including the notes thereto,
included elsewhere in this Prospectus. Unless the context otherwise requires,
and except as used in "Description of Exchange Notes," all references in this
Prospectus to the "Company" include HighwayMaster Communications, Inc. and its
operating subsidiary, HMC. Certain technical and other terms used in this
Prospectus are defined in the Glossary included herein.

                                   THE COMPANY

         HighwayMaster Communications, Inc. develops and implements mobile
communications solutions, including integrated voice, data and position location
services, to meet the needs of its customers. The initial application for the
Company's wireless enhanced services network has been developed for, and is
currently being marketed and sold to, companies which operate in the long-haul
trucking market. The Company provides long-haul trucking customers with a
comprehensive package of mobile communications and management control services
at low, fixed per minute rates, thereby enabling its trucking customers to
effectively monitor the operations and improve the performance of their fleets.
As of June 30, 1997, the Company had in service an installed base of 25,233
Series 5000 mobile communication units ("Series 5000 Mobile Units") in the
long-haul trucking market and had orders to install an additional 9,059 Series
5000 Mobile Units.

         The Company is currently developing new applications for its wireless
enhanced services network to expand the range of trucking companies that utilize
its services and address the needs of the automotive and other markets. The
Company plans to introduce its Series 3000 mobile communication units ("Series
3000 Mobile Units"), which will be less expensive and will offer more limited
functionality than its current long-haul trucking product. The Company intends
to market the Series 3000 Mobile Units primarily to smaller trucking fleets and
owner-operators that can benefit from the Company's enhanced wireless services,
including primarily its nationwide voice communication capabilities, and for
whom protection from fraud, effective call delivery and low airtime charges are
critical requirements. The Company expects that preliminary versions of the
Series 3000 Mobile Unit will be introduced in early 1998, which the Company
believes will be supplanted by a more advanced version of this product by the
end of 1998. In addition, in January 1997, the Company entered into a strategic
business alliance with Prince Corporation ("Prince"), a subsidiary of Johnson
Controls, Inc. ("Johnson Controls") and a leading supplier of automotive
interior systems and components, pursuant to which the parties are developing
and marketing and will provide a wireless automobile safety and security
service, the AutoLink(R) service, to be offered to motorists in the United
States and Canada. The AutoLink service is expected to be offered on a
commercial basis beginning in late 1998. The Company is currently negotiating
with Motorola to supply a hardware component that will provide a common platform
for the AutoLink product, the Series 5000 Mobile Units and more advanced
versions of its Series 3000 Mobile Units, but no assurance can be given that
such an agreement will be reached or as to the terms thereof.

         The Company provides its mobile communications services through its
wireless enhanced services network, which utilizes patented technology developed
by the Company to integrate various transmission, long-distance, switching,
tracking and other services provided through contracts with certain
telecommunications companies and more than 70 cellular carriers. Through its
agreements with cellular carriers, the Company is able to take advantage of the
more than $32 billion which cellular carriers have invested to establish and
expand cellular coverage in the United States. The Company's network covers 99%
of the available cellular service areas in the United States and 100% of the
available A-side coverage in Canada. Call processing and related functions for
the Company's network are provided through a switching complex (the "NSC") owned
by the Company and a separate switching complex (the "AT&T Complex") operated by
AT&T Corporation ("AT&T"). In September 1997, AT&T notified the Company that it
would discontinue offering services through the AT&T Complex as of December 31,
1997, and the Company intends to begin servicing all of its customers through
the NSC as of such date. The Company holds ten United States patents that cover


                                        1

<PAGE>   7
certain key features of its network which are used in locating and communicating
with vehicles using the cellular infrastructure.

         Management believes that several significant factors differentiate the
services which the Company is able to provide through its wireless enhanced
services network from conventional cellular service, including the following:

                  o Immediate Nationwide Call Delivery. In order to
         automatically (with no user intervention) provide immediate call
         delivery to cellular subscribers who travel outside of their home
         markets, a cellular carrier must install advanced switching equipment
         (IS-41 capable), establish physical connectivity and establish the
         appropriate roaming agreements with other cellular carriers. Primarily
         as a result of the cost of this advanced switching equipment, the
         Company believes that many cellular markets located outside of major
         metropolitan areas have not yet implemented automatic call delivery
         capabilities. HighwayMaster uses a patented technology which works
         independently from cellular carriers' IS-41 protocol to automatically
         provide immediate call delivery to its customers on essentially a
         nationwide basis.

                  o Fraud Control. Conventional cellular service has
         historically experienced relatively high levels of fraud. Industry
         sources estimate that cellular fraud resulted in losses totaling
         approximately $650 million in 1995. The Company has been able to
         significantly limit fraud through the architecture of its network,
         which requires that all calls originated by customers be routed to one
         of the switching complexes operated by or for the Company and thereby
         reduces or eliminates cellular cloning, fraud and call blocking for its
         customers. To date, neither the Company nor the cellular carriers which
         have properly implemented the Company's protocols have experienced any
         significant levels of roamer fraud in connection with the mobile
         communications services provided through the Company's network.

                  o Low Nationwide Fixed Airtime Charges. The Company believes
         that basic cellular air time charges for cellular subscribers who
         travel out of their home markets range from as much as $1.00 to $2.00
         per day per market and from $0.45 to $1.25 per minute, in addition to
         applicable long-distance charges. By comparison, the Company's
         customers in the long-haul trucking market are charged a fixed rate of
         $0.53 per minute for voice communications within the United States,
         which includes long-distance charges.

                  o Additional Value-Added Services. The Company offers its
         customers additional value-added services which are not offered by
         cellular carriers who are unable to supplement the capabilities of the
         existing cellular infrastructure with the features and capabilities of
         the Company's network. The value-added services currently offered by
         the Company include data transmission and fleet tracking, as well as a
         number of other ancillary services, such as estimating times of
         arrival, calculating fuel tax mileage and monitoring engine
         performance.

BUSINESS STRATEGY

         The Company's objective is to become a leading provider of mobile
communications services to customers in its targeted markets. To achieve this
objective, the Company will seek to take advantage of the commercial potential
of the HighwayMaster network in four separate ways. First, the Company intends
to achieve greater penetration of the long-haul trucking market by continuing to
increase its base of Series 5000 Mobile Units installed in customers' trucks.
Second, the Company intends to use the capabilities of its network to develop
and implement new applications for the automotive and other markets, including
the AutoLink service to be offered to motorists in the United States and Canada.
Third, the Company intends to develop a common hardware platform for the
AutoLink product, the Series 5000 Mobile Units and more advanced versions of its
Series 3000 Mobile Units, which should enable it to leverage any volume cost
savings that may be derived from offering the AutoLink application to reduce the
price of its long-haul trucking products, thereby enabling the Company to expand
the segments of the long-haul trucking market which it is 


                                       2
<PAGE>   8

able to serve on an economical basis. Fourth, the Company intends to pursue
opportunities, either alone or in cooperation with international partners, to
export its technology and applications to selected foreign markets.


                                       3

<PAGE>   9
THE LONG-HAUL TRUCKING SOLUTION

         The Company currently provides integrated mobile voice, data, tracking
and fleet management information services to trucking companies and other
private operators in the long-haul trucking market. These services are provided
by linking customers to the Company's network through the installation of Series
5000 Mobile Units in their trucks. The Series 5000 Mobile Unit enables a truck
driver to send and receive voice and data messages and utilize all of the other
features and capabilities of the Company's network. Management believes that the
system offered by the Company to trucking customers represents the most complete
and cost-effective package of mobile communications products and services
currently available to the long-haul trucking industry. A key feature of this
system is its ability to offer voice communication capabilities on essentially a
nationwide basis through the use of the existing cellular infrastructure.
Currently, the Company's primary competitor offers a satellite-based system that
provides data-only mobile communication services with no voice capabilities.

         In addition to its voice communications capabilities, the Series 5000
Mobile Unit permits the transmission and receipt of data messages between a
truck and a dispatcher. The Series 5000 Mobile Unit also has navigational
tracking capabilities which allow trucking companies to map a truck's position,
typically within 100 yards, anywhere in the United States and Canada.
Furthermore, the Series 5000 Mobile Unit is capable of performing a number of
other functions such as calculating fuel tax mileage, estimating times of
arrival, storing data and monitoring on-board electronic engine and other
electronic functions. For small to mid-sized fleets, the Company also offers a
dispatch software package that enables a trucking dispatcher to optimize the use
of its fleet by processing data transmitted by the Series 5000 Mobile Units and
performing a variety of fleet management information functions.

         The Company is continuing to expand its installed base of Series 5000
Mobile Units in the long-haul trucking market. In late 1996 and 1997, the
Company received orders for the installation of a total of 7,000 Series 5000
Mobile Units from Ameritruck Distribution Corporation ("Ameritruck"), Burlington
Motor Carriers, Inc. ("Burlington") and a subsidiary of Wal-Mart Stores, Inc.
("Wal-Mart"), of which it had installed a total of 2,724 units by June 30, 1997.
The Company expects that substantially all of the remaining units ordered by
these customers will be installed prior to December 31, 1997. As of June 30,
1997, the Company had an installed base of 25,233 Series 5000 Mobile Units and
had orders to install an additional 9,059 Series 5000 Mobile Units.

         The Company is currently engaged in developing the Series 3000 Mobile
Units, which will be less expensive and will offer more limited functionality
than its current long-haul trucking product. The Series 3000 Mobile Unit will be
able to perform voice communication services and additional functions such as
the automated capture and transmission of engine data and other information as
well as vehicle tracking. Customers who utilize the Series 3000 Mobile Unit will
pay the same low, fixed per-minute rates for voice and data communications as
those who use the Series 5000 Mobile Unit, but will be assessed a reduced per
unit charge on a monthly basis. The Company believes that the Series 3000 Mobile
Units will allow it to serve a broader segment of the long-haul trucking market,
including smaller fleets and owner-operators who do not require all the features
of the Series 5000 Mobile Unit but can benefit from the advantages of the
Company's wireless enhanced services network. Additionally, the Company believes
that it will be able to serve fleets that currently utilize data- only mobile
communications services provided by the Company's competitors. The Company
expects that preliminary versions of the Series 3000 Mobile Unit will be
introduced in early 1998, which will be supplanted by a more advanced version of
this product by the end of 1998.

         Based on the 1992 Department of Commerce census (the "Department of
Commerce Census"), management believes that there are currently approximately
2.2 million long-haul commercial trucks in the United States. Although the
Company expects to generate sales of Series 5000 Mobile Units in all sectors of
the long-haul trucking market, the Company's primary target market for this
product is operators of mid- and large-sized fleets (25 or more trucks)
consisting of larger-sized trucks (Class 6, 7 and 8 trucks) used for long-haul
transport (average distances in excess of 100 miles). Based on the Department of
Commerce Census, management estimates that there are currently 


                                       4
<PAGE>   10

approximately 530,000 trucks in the primary target market for the Series 5000
Mobile Unit. Management further estimates that approximately 30% of these trucks
are currently equipped with some form of integrated mobile communications
solution, but believes that substantially all operators in this market will
experience significant competitive pressures over the next five years to adopt
some form of integrated mobile communications solution. In addition, the Company
intends to introduce the Series 3000 Mobile Unit, and management believes that
this product is likely to appeal to small-sized fleets (24 or fewer trucks)
consisting of larger-sized trucks used for long-haul transport, as well as
fleets of smaller-sized trucks (Class 1-5 trucks) used for the same purposes.
Based on the Department of Commerce's Census, the Company believes that there
are currently approximately 1.7 million trucks in this extended market for the
Series 3000 Mobile Units.

THE AUTOLINK ALLIANCE

         As a result of the demonstrated capabilities of the Company's long-haul
trucking application, Prince approached the Company in early 1996 and proposed
that the Company provide the mobile communications network for its new
automobile safety and security service. In January 1997, the Company entered
into a strategic business alliance with Prince pursuant to which the parties
will develop and provide the AutoLink service to motorists in the United States
and Canada. The basic AutoLink product will provide an intelligent
communications link from the car to a new switching complex (the "AutoLink
Complex") with connections to various vendors in order to provide emergency
assistance, roadside assistance and information services to motorists, including
remote tracking of stolen or missing vehicles. The principal components of the
AutoLink system are (i) the end-user interface, which will be designed and
manufactured by Prince, (ii) the in-vehicle communications and location
hardware, which the Company expects will be manufactured by Motorola to the
Company's specifications and will incorporate certain of the Company's patented
technology and (iii) the wireless enhanced services network, which will be
provided and managed by the Company. The Company currently expects that the
AutoLink service will be offered on a commercial basis in the after-market
(owners of existing vehicles) beginning in late 1998 and in the original
equipment manufacturers ("OEM") market beginning in the second half of 1999.

         Under the terms of the strategic alliance between the Company and
Prince, the Company will be responsible for, among other things, managing the
network, providing software for the intelligent mobile unit and assisting in
managing various information service providers. In addition, the Company will
oversee distribution and marketing of the after-market product business. Prince,
which has extensive automotive industry expertise, will be responsible for
marketing and sales and contracting with equipment suppliers in the OEM market.
The AutoLink product will be offered to both the OEM market and the
after-market. The Company has entered into a memorandum of understanding with
CellStar Corporation ("CellStar") which contemplates that CellStar will act as
the exclusive distributor for the AutoLink product in the after-market. In
consideration for the services to be provided by it in connection with the
AutoLink service, it is expected that the Company will receive certain fees,
including an activation fee, a monthly per-user charge and service charges for
all calls placed by or for end users.

OTHER RECENT DEVELOPMENTS

         SBC Transactions. In September 1996, a subsidiary of SBC Communications
Inc. ("SBC") made a strategic investment in the Company. In particular, SBC
purchased $20.0 million of preferred stock from the Company, which may under
certain circumstances be converted into common stock, and agreed to provide
certain technical services to the Company in connection with the operation and
improvement of its network. In addition, the Company issued to SBC warrants to
purchase an aggregate of 5,000,000 shares of the Company's common stock. The
securities issued to SBC in connection with these transactions would, if fully
converted or exercised by SBC, represent an aggregate ownership interest of
approximately 21.0% of the Company's common stock. The Company believes that its
alliance with SBC will allow it to accelerate the development and implementation
of various features of its network and mobile communications services.


                                       5
<PAGE>   11

         Wal-Mart Order. In April 1997, the Company entered into a contract with
Wal-Mart pursuant to which Wal-Mart ordered an aggregate of 3,000 additional
Series 5000 Mobile Units for installation in its private fleet of trucks. This
order followed an extensive product test conducted at two Wal-Mart distribution
centers in which Wal-Mart evaluated the performance of 354 Series 5000 Mobile
Units over a period of 12 months. The Company had installed a total of 1,074
Series 5000 Mobile Units (including 720 included in the recent 3,000 unit order)
in Wal-Mart's fleet by June 30, 1997, and it expects that substantially all of
the remaining units ordered by Wal-Mart will be installed by the end of 1997.

         Burlington Order and Related Transactions. In early 1997, the Company
entered into an agreement with Burlington, which provides for the installation
of up to 2,000 Series 5000 Mobile Units in Burlington's fleet of long-haul
trucks. As part of the transaction, the Company purchased exclusive ownership
rights to Burlington's proprietary fleet operating and management information
software and has assumed the operation of its data center and computer systems.
The Company intends to add capacity to the Burlington data center in order to
provide a broad range of data processing services to other trucking companies,
which would essentially replace such companies' existing management information
systems departments with services, software and hardware to be provided by the
Company. The capacity to be added by the Company would enable it to use the
Burlington software and data center in conjunction with the HighwayMaster
network to offer its customers levels of integration which management believes
are not currently available in the trucking industry. Management currently
expects that the primary market for the data processing services to be offered
by the Company will consist of midsize fleets which have significant fleet
management and other logistical requirements but have not yet made substantial
investments in information technology. The Company expects to offer data
processing services to customers for a fixed, per mile charge, which will
provide a measure of consistency and predictability that management believes may
be appealing to a number of its trucking customers.

                               THE UNITS OFFERING

         On September 23, 1997, the Company consummated the Units Offering,
pursuant to which it sold 125,000 Units, each consisting of $1,000 principal
amount of Old Notes and one Warrant to purchase 6.566 shares of Common Stock.
The Warrants are exercisable at a price of $9 5/8 per share, subject to certain
anti-dilution provisions. Warrant holders may exercise the Warrants at any time
on or after the earlier to occur of (i) September 23, 1998 and (ii) in the event
a Change of Control occurs, the date the Company mails notice thereof to the
holders of Notes and Warrants. Unless exercised, the Warrants will expire on
September 15, 2005. If all Warrants were exercised as of the date of issuance
thereof, the Warrants would represent approximately 3% of the Common Stock
outstanding on a fully-diluted basis after giving effect to the exercise of
certain outstanding options or rights issued by the Company. The Old Notes and
Warrants will become separable no later than upon the commencement of the
Exchange Offer.

         The Company used approximately $46.6 million of the net proceeds from
the Units Offering to fund the purchase of the Pledged Securities, which will
provide funds sufficient to pay in full when due the first six scheduled
interest payments on the Notes. The Pledged Securities are pledged as security
for the repayment of principal of and interest on the Notes, Liquidated Damages,
if any, and all other obligations under the Indenture. See "Description of
Exchange Notes -- Security." All remaining proceeds from the Units Offering have
been contributed by the Company to HMC and will be used for general corporate
purposes, including (i) to fund working capital requirements and operating
losses expected to be incurred in connection with the continued growth and
development of the Company's existing long-haul trucking application, (ii) to
fund expenditures relating to the development of new mobile communications
applications to be provided through the Company's network, including the
proposed Series 3000 Mobile Unit and AutoLink service, and (iii) to fund capital
expenditures required to expand the capacity of the NSC to enable it to serve a
larger number of long-haul trucking customers and to construct the AutoLink
Complex through which the AutoLink service will be provided to motorists in the
United States and Canada.


                                       6
<PAGE>   12

         The Units were sold by the Company on September 23, 1997 to Bear,
Stearns & Co. Inc. and Smith Barney Inc. (the "Initial Purchasers") pursuant to
a Purchase Agreement dated September 18, 1997 (the "Purchase Agreement"). The
Initial Purchasers subsequently resold the Units to qualified institutional
buyers pursuant to Rule 144A under the Securities Act and pursuant to offers and
sales that occurred outside the United States within the meaning of Regulation S
under the Securities Act. Pursuant to the Purchase Agreement, the Company and
the Initial Purchasers entered into a Registration Rights Agreement dated
September 23, 1997 (the "Registration Rights Agreement"), which grants the
holders of the Old Notes certain exchange and registration rights. The Exchange
Offer is intended to satisfy certain obligations of the Company under the
Registration Rights Agreement.



                               THE EXCHANGE OFFER

Securities Offered......................... $125,000,000 aggregate principal 
                                            amount of Series B 13 3/4% Senior 
                                            Notes due 2005 (the "Exchange 
                                            Notes").

The Exchange Offer......................... $1,000 principal amount of the 
                                            Exchange Notes in exchange for each
                                            $1,000 principal amount of Old 
                                            Notes.  As of the date hereof, 
                                            $125,000,000 aggregate principal 
                                            amount of Old Notes are outstanding.
                                            The Company will issue the Exchange
                                            Notes to holders on or promptly 
                                            after the Expiration Date.

                                            Based on an interpretation by the
                                            staff of the Commission set forth in
                                            no-action letters issued to third
                                            parties, the Company believes that
                                            Exchange Notes issued pursuant to
                                            the Exchange Offer in exchange for
                                            Old 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 that
                                            such holder does not intend to
                                            participate and has no arrangement
                                            or understanding with any person to
                                            participate in the distribution of
                                            such Exchange Notes.

                                            Each Participating 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
                                            Participating 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


                                       7
<PAGE>   13

                                            Participating Broker-Dealer in
                                            connection with resales of Exchange
                                            Notes received in exchange for Old
                                            Notes where such Old Notes were
                                            acquired by such Participating
                                            Broker-Dealer as a result of
                                            market-making activities or other
                                            trading activities (other than a
                                            resale of an unsold allotment from
                                            the original sale of Old Notes). The
                                            Company has agreed that, for a
                                            period of 180 days after the
                                            Exchange Offer Registration
                                            Statement is declared effective, it
                                            will make this Prospectus available
                                            to any Participating Broker-Dealer
                                            for use in connection with any such
                                            resale. See "Plan of Distribution."

                                            Any holder who tenders in the
                                            Exchange Offer with the intention to
                                            participate, or for the purpose of
                                            participating, in a distribution of
                                            the Exchange Notes could not rely on
                                            the position of the staff of the
                                            Commission enunciated in no-action
                                            letters and, in the absence of an
                                            exemption therefrom, must comply
                                            with the registration and prospectus
                                            delivery requirements of the
                                            Securities Act in connection with
                                            any resale transaction. Failure to
                                            comply with such requirements in
                                            such instance may result in such
                                            holder incurring liability under the
                                            Securities Act for which the holder
                                            is not indemnified by the Company.

Expiration Date............................ 5:00 p.m., New York time, on    
                                            December 10, 1997 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.

Accrued Interest on the Exchange Notes
and the Old Notes.......................... Each Exchange Note will bear
                                            interest from the most recent date
                                            to which interest has been paid or
                                            duly provided for on the Old Note
                                            surrendered in exchange for such
                                            Exchange Note or, if no interest
                                            has been paid or duly provided for
                                            on such Old Note, from September
                                            23, 1997. Interest on the Exchange
                                            Notes is payable semi-annually on
                                            each March 15 and September 15,
                                            commencing on March 15, 1998.
        
                                            Holders of Old Notes whose Old Notes
                                            are accepted for exchange will not
                                            receive accrued interest on such Old
                                            Notes for any period from and after
                                            the last date to which interest has
                                            been paid or duly provided for on
                                            the Old Notes prior to the original
                                            issue date of the Exchange Notes or,
                                            if no such interest has been paid or
                                            duly provided for, will not receive
                                            any accrued interest on such Old
                                            Notes, and will be deemed to have
                                            waived, the right to receive any
                                            interest on such Old Notes accrued
                                            from and after September 23, 1997.

Conditions to the Exchange Offer........... The Exchange Offer is subject to
                                            certain customary conditions, which
                                            may be waived by the Company. See
                                            "The Exchange Offer -- Conditions."
        

                                       8
<PAGE>   14

Procedures for Tendering Old Notes......... Each holder of Old Notes wishing to
                                            accept the Exchange Offer must
                                            complete, sign and date the
                                            accompanying 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 Old
                                            Notes and any other required
                                            documentation to the Exchange Agent
                                            (as defined herein) at the address
                                            set forth in the Letter of
                                            Transmittal. By executing the Letter
                                            of Transmittal, each holder will
                                            represent to the Company that, among
                                            other things, the Exchange Notes
                                            acquired pursuant to the Exchange
                                            Offer are being obtained in the
                                            ordinary course of business of the
                                            person receiving such Exchange
                                            Notes, whether or not such person is
                                            the holder, that neither the holder
                                            nor any such other person has any
                                            arrangement or understanding with
                                            any person to participate in the
                                            distribution of such Exchange Notes
                                            and that neither the holder nor any
                                            such other person is an "affiliate,"
                                            as defined under Rule 405 of the
                                            Securities Act. See "The Exchange
                                            Offer -- Purpose and Effect of the
                                            Exchange Offer" and "The Exchange
                                            Offer -- Procedures for Tendering."

Untendered Old Notes....................... Following the consummation of the
                                            Exchange Offer, holders of Old
                                            Notes eligible to participate but
                                            who do not tender their Old Notes
                                            will not have any further exchange
                                            rights and such Old Notes will
                                            continue to be subject to certain
                                            restrictions on transfer.
                                            Accordingly, the liquidity of the
                                            market for such Old Notes could be
                                            adversely affected.
        
Consequences of Failure
to Exchange................................ The Old Notes that are not
                                            exchanged pursuant to the Exchange
                                            Offer will remain restricted
                                            securities. Accordingly, such Old
                                            Notes may be resold only (i) to the
                                            Company, (ii) pursuant to an
                                            effective registration statement
                                            under the Securities Act, (iii)
                                            pursuant to Rule 144A or Rule 144
                                            under the Securities Act, (iv)
                                            outside the United States to a
                                            foreign person pursuant to the
                                            requirements of Rule 904 under the
                                            Securities Act, (v) to an
                                            institutional "accredited investor"
                                            as defined in Rule 501(a)(1), (2),
                                            (3) or (7) under the Securities Act
                                            who furnishes the Trustee with a
                                            letter containing certain
                                            representations and agreements and,
                                            in the case of any transfer of
                                            aggregate principal amount of Old
                                            Notes of $100,000 or less an
                                            opinion of counsel, if the Company
                                            so requests, or (vi) pursuant to
                                            some other exemption under the
                                            Securities Act (and based on an
                                            opinion of counsel, if the Company
                                            so requests). See "The Exchange
                                            Offer -- Consequences of Failure to 
                                            Exchange."
        

                                       9
<PAGE>   15

Shelf Registration Statement............... In the event that (i) the Exchange
                                            Offer is not available to any
                                            holder or may not be consummated
                                            because, in either case, it would
                                            violate applicable securities laws
                                            or because the applicable
                                            interpretations of the staff of the
                                            Commission would not permit the
                                            Company to effect the Exchange
                                            Offer, or (ii) in certain
                                            circumstances the holder notifies
                                            the Company that it is unable to
                                            participate in the Exchange Offer
                                            or is unable to use this
                                            Prospectus, the Company will cause
                                            to be filed with the Commission, no
                                            later than 45 days after such
                                            obligation arises, a shelf
                                            registration statement (the "Shelf
                                            Registration Statement"). The
                                            Company will use its best efforts
                                            to cause the Shelf Registration
                                            Statement to be declared effective
                                            on or before the 180th day after
                                            the completion of the Old Notes
                                            Offering. The Company has agreed to
                                            maintain the effectiveness of the
                                            Shelf Registration Statement, under
                                            certain circumstances, for a
                                            maximum of two years following the
                                            date of the completion of the Old
                                            Notes Offering. 

Special Procedures for Beneficial
Owners..................................... Any beneficial owner whose Old
                                            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 its Old Notes, either
                                            make appropriate arrangements to
                                            register ownership of the Old 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. The Company will
                                            keep the Exchange Offer open for
                                            not less than twenty days in order
                                            to provide for the transfer of
                                            registered  ownership.

Guaranteed Delivery Procedures............. Holders of Old Notes who wish to
                                            tender their Old Notes and whose
                                            Old Notes are not immediately
                                            available or who cannot deliver
                                            their Old Notes, the Letter of
                                            Transmittal or any other documents
                                            required by the Letter of
                                            Transmittal to the Exchange Agent
                                            (or comply with the procedures for
                                            book- entry transfer) prior to the
                                            Expiration Date must tender their
                                            Old 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   
                                            time, on the Expiration Date.

Acceptance of Notes and Delivery of
Exchange Notes............................. The Company will accept for
                                            exchange, subject to the conditions
                                            described under "The Exchange Offer
                                            -- Conditions," any and all Old
                                            Notes which are properly tendered
                                            in the Exchange Offer prior to 5:00
                                            p.m., New York time, on the
                                            Expiration Date. The Exchange Notes
                                            issued pursuant to the Exchange
                                            Offer will be delivered promptly
                                            following the Expiration Date. See
                                            "The Exchange Offer -- Terms of the
                                            Exchange Offer."
        

                                       10
<PAGE>   16

Use of Proceeds............................ There will be no cash proceeds to
                                            the Company from the exchange
                                            pursuant to the Exchange Offer.
        
Exchange Agent............................. Texas Commerce Bank National 
                                            Association.


                                       11
<PAGE>   17

                                                  THE EXCHANGE NOTES

General.................................... The form and terms of the Exchange
                                            Notes are the same as the form and
                                            terms of the Old Notes (which they
                                            replace) except that (i) the
                                            Exchange Notes bear a Series B
                                            designation, (ii) the Exchange
                                            Notes have been registered under
                                            the Securities Act and, therefore,
                                            will not bear legends restricting
                                            the transfer thereof, and (iii) the
                                            holders of Exchange Notes will not
                                            be entitled to certain rights under
                                            the Registration Rights Agreement,
                                            including the provisions providing
                                            for an increase in the interest
                                            rate on the Old Notes in certain
                                            circumstances relating to the
                                            timing of the Exchange Offer, which
                                            rights will terminate when the
                                            Exchange Offer is consummated. See
                                            "The Exchange Offer -- Purpose and
                                            Effect of the Exchange Offer." The
                                            Exchange Notes will evidence the
                                            same debt as the Old Notes and will
                                            be entitled to the benefits of the
                                            Indenture. See "Description of
                                            Exchange Notes." The Warrants
                                            issued in connection with the
                                            issuance of the Old Notes are not
                                            subject to the Exchange Offer and
                                            will continue to be subject to the
                                            restrictions on transfer set forth
                                            therein.
        
Securities Offered......................... $125,000,000 aggregate principal
                                            amount of Series B 13 3/4% Senior
                                            Notes due 2005 of the Company.
        
Maturity................................... September 15, 2005.

Interest................................... The Exchange Notes will bear
                                            interest at a rate of 13 3/4% per
                                            annum, payable semi-annually in
                                            arrears on March 15 and September
                                            15 of each year, commencing March
                                            15, 1998.
        
Ranking.................................... The Exchange Notes will be senior
                                            obligations of the Company, will
                                            rank pari passu in right of payment
                                            with all existing and future
                                            unsecured senior Indebtedness of
                                            the Company and will rank senior in
                                            right of payment to any future
                                            Subordinated Indebtedness (as
                                            defined herein) of the Company. As
                                            of June 30, 1997, after giving
                                            effect to the Units Offering on a
                                            consolidated basis the Company had
                                            outstanding indebtedness with a
                                            principal amount of $125.0 million
                                            ($120.8 million net of debt
                                            discount) and $9.2 million of other
                                            senior liabilities (including trade
                                            payables). The Company is a holding
                                            company and substantially all of
                                            its operations are conducted
                                            through HMC, its operating
                                            subsidiary. Accordingly, except in
                                            the case of Restricted Subsidiaries
                                            (which will guarantee the
                                            obligations of the Company under
                                            the Exchange Notes), the Exchange
                                            Notes will be effectively
                                            subordinated to all Indebtedness
                                            and other obligations of the
                                            Company's subsidiaries.
                                            Furthermore, the holders of the
                                            Exchange Notes will not share in
                                            the proceeds from the sale of or
                                            other realization upon any assets
                                            in which the Company has granted
                                            security interests until the
                                            repayment of the Indebtedness
                                            secured thereby. The Indenture
                                            permits the Company and its
                                            subsidiaries to incur additional
                                            Indebtedness, including senior
                                            Indebtedness and secured
                                            Indebtedness, subject to certain
                                            limitations.
        

                                       12
<PAGE>   18

Security................................... Approximately $46.6 million of the
                                            net proceeds of the Units Offering
                                            was used by the Company to purchase
                                            and pledge to the Trustee, for the
                                            benefit of the holders of the
                                            Notes, the Pledged Securities,
                                            which are in an amount 
                                            sufficient upon receipt of
                                            scheduled interest and principal
                                            payments, to provide for payment in
                                            full when due of the first six
                                            scheduled semi-annual interest
                                            payments on the Notes. The Pledged
                                            Securities are pledged as security
                                            for the repayment of the principal
                                            of and interest on the Notes,
                                            Liquidated Damages, if any, and all
                                            other obligations under the
                                            Indenture. When an interest payment
                                            is due, the Company may either
                                            deposit sufficient funds to pay the
                                            interest scheduled to be paid or
                                            direct the Trustee to release from
                                            the Pledge Account (as defined
                                            herein) funds sufficient to pay the
                                            interest scheduled. In the event
                                            the Company exercises the former
                                            option, the Pledge Agreement
                                            provides the Company may direct the
                                            Trustee to release proceeds or the
                                            Pledged Securities from the Pledge
                                            Account in a like amount. If the
                                            Company makes the first six
                                            scheduled interest payments on the
                                            Notes in a timely manner and no
                                            Default (as defined herein) or
                                            Event of Default (as defined
                                            herein) is then continuing, the
                                            remaining Pledged Securities, if
                                            any, will be released from the
                                            Pledge Account and the Notes will
                                            thereafter be unsecured obligations
                                            of the Company. See "Description of 
                                            Exchange Notes -- Security."

Subsidiary Guarantees...................... The obligations of the Company
                                            under the Exchange Notes will be
                                            guaranteed on a senior unsecured
                                            basis by all Restricted
                                            Subsidiaries. HMC will be the
                                            initial Restricted Subsidiary (the
                                            "Initial Restricted Subsidiary"),
                                            and future Restricted Subsidiaries
                                            of the Company will be required to
                                            issue Subsidiary Guarantees. Each
                                            Subsidiary Guarantee will be a
                                            senior unsecured obligation of the
                                            applicable Restricted Subsidiary,
                                            will rank pari passu in right of
                                            payment with all existing and
                                            future unsecured senior
                                            Indebtedness of such Restricted
                                            Subsidiary and will rank senior in
                                            right of payment to any
                                            Subordinated Indebtedness of such
                                            Restricted Subsidiary. As of June
                                            30, 1997, the aggregate amount of
                                            outstanding senior Indebtedness and
                                            other senior liabilities (including
                                            trade payables) of the Initial
                                            Restricted Subsidiary would,
                                            without regard to the Subsidiary
                                            Guarantee, have been approximately
                                            $9.2 million. Furthermore, the
                                            holders of the Exchange Notes will
                                            not share in the proceeds from the
                                            sale of or other realization upon
                                            any assets of such Restricted
                                            Subsidiary in which the Restricted
                                            Subsidiary has granted security
                                            interests until the repayment of
                                            the indebtedness secured thereby. 


                                       13
<PAGE>   19

Optional Redemption........................ The Exchange Notes will be
                                            redeemable, at the option of the
                                            Company, in whole or in part, at
                                            any time on or after September 15,
                                            2001, at the redemption prices set
                                            forth herein, plus accrued and
                                            unpaid interest and Liquidated
                                            Damages, if any, thereon to the
                                            applicable redemption date.
                                            Notwithstanding the foregoing, on
                                            or prior to September 15, 2000, the
                                            Company may redeem at any time or
                                            from time to time up to 35% of the
                                            aggregate principal amount of the
                                            Exchange Notes at a redemption
                                            price equal to 113.75% of the
                                            principal amount thereof, plus
                                            accrued and unpaid interest and
                                            Liquidated Damages, if any, thereon
                                            to the applicable redemption date,
                                            with the net proceeds of an Equity
                                            Investment; provided, that at least
                                            65% of the aggregate principal
                                            amount of the Exchange Notes
                                            initially issued remains
                                            outstanding after giving effect to
                                            the redemption thereof. See
                                            "Description of Exchange Notes --
                                            Optional Redemption."
        
Change of Control.......................... Upon the occurrence of a Change of
                                            Control, the Company will be
                                            required to make an offer to
                                            repurchase all of the outstanding
                                            Exchange Notes at a price equal to
                                            101% of the principal amount
                                            thereof, plus accrued and unpaid
                                            interest and Liquidated Damages, if
                                            any, thereon to the repurchase
                                            date. See "Description of Exchange
                                            Notes -- Repurchase at the Option
                                            of Holders -- Change        of
                                            Control."

Certain Covenants.......................... The Indenture contains certain
                                            covenants that, among other things,
                                            limit the ability of the Company
                                            and its Restricted Subsidiaries to
                                            incur additional Indebtedness, pay
                                            dividends or make other
                                            distributions, repurchase any
                                            capital stock or Subordinated
                                            Indebtedness, make certain
                                            investments, create certain liens,
                                            enter into certain transactions
                                            with affiliates, sell assets, enter
                                            into certain mergers and
                                            consolidations, allow Restricted
                                            Subsidiaries to create certain
                                            dividend and other payment
                                            restrictions, enter into sale and
                                            leaseback transactions, and issue
                                            or sell capital stock of Restricted
                                            Subsidiaries. See   "Description of
                                            Exchange Notes -- Certain
                                            Covenants."  


                                       14
<PAGE>   20

                                  RISK FACTORS

         For a discussion of certain factors that should be considered by
investors in connection with the Exchange Offer, see "Risk Factors."


                                       15
<PAGE>   21

                       SUMMARY CONSOLIDATED FINANCIAL DATA


<TABLE>
<CAPTION>
                                                                                                SIX MONTHS ENDED
                                                               YEAR ENDED DECEMBER 31,              JUNE 30,
                                                          --------------------------------    --------------------
                                                            1994        1995        1996        1996        1997
                                                          --------    --------    --------    --------    --------
                                                              (DOLLARS IN THOUSANDS, EXCEPT FOR PER SHARE AND
                                                                               OPERATING DATA)
<S>                                                       <C>         <C>         <C>         <C>         <C>     
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Revenues:
  Product .............................................   $ 11,075    $ 16,946    $ 14,645    $  6,423    $ 14,249
  Service .............................................      2,436       9,908      16,056       7,449      11,006
                                                          --------    --------    --------    --------    --------
        Total revenues ................................     13,511      26,854      30,701      13,872      25,255
Cost of Revenues:
  Product .............................................     11,867      17,730      15,099       6,403      12,148
  Service .............................................      2,099       9,172      11,489       5,415       8,671
  Writedown of inventory ..............................      1,658          --       1,943          --          --
                                                          --------    --------    --------    --------    --------
        Total cost of revenues ........................     15,624      26,902      28,531      11,818      20,819
                                                          --------    --------    --------    --------    --------
    Gross profit (loss) ...............................     (2,113)        (48)      2,170       2,054       4,436
General and administrative expenses ...................      6,577       7,299       9,479       4,299       7,096
Sales and marketing expenses ..........................      3,890       6,273       9,139       4,710       4,055
Engineering expenses ..................................      1,900       2,868       4,094       1,736       2,212
Customer service expenses .............................      4,587       5,727       8,089       3,930       5,538
                                                          --------    --------    --------    --------    --------
    Operating loss ....................................    (19,067)    (22,215)    (28,631)    (12,621)    (14,465)
Interest income .......................................        279       1,041         809         444         448
Interest expense to related parties ...................     (5,999)     (5,106)     (1,691)     (1,088)         --
Recapitalization costs ................................       (733)         --          --          --          --
Other expense .........................................       (361)       (117)       (230)         (3)         --
                                                          --------    --------    --------    --------    --------
  Loss before income taxes and extraordinary item .....    (25,881)    (26,397)    (29,743)    (13,268)    (14,017)
Income tax provision ..................................         --          --          --          --          --
                                                          --------    --------    --------    --------    --------
Loss before extraordinary item ........................    (25,881)    (26,397)    (29,743)    (13,268)    (14,017)
Extraordinary item-- loss on extinguishment of debt ...         --      (6,980)       (317)         --          --
                                                          --------    --------    --------    --------    --------
  Net loss ............................................   $(25,881)   $(33,377)   $(30,060)   $(13,268)   $(14,017)
                                                          ========    ========    ========    ========    ========
  Net loss per share(1) ...............................   $  (1.50)   $  (1.73)   $  (1.40)   $  (0.66)   $  (0.56)
                                                          ========    ========    ========    ========    ========
OTHER FINANCIAL AND OPERATING DATA:
Installed base of Series 5000 Mobile Units(2) .........      6,131      14,751      20,354      17,439      25,233
Average monthly Series 5000 Mobile Unit usage(3) ......        135         136         130         130         126
Average monthly Series 5000 Mobile Unit service
  revenue(4) ..........................................   $  66.22    $  79.08    $  76.23    $  77.14    $  80.48
Capital expenditures ..................................   $  1,613    $  4,076    $  5,139    $  2,187    $  3,253
Ratio of earnings to fixed charges(5) .................         --          --          --          --          --
</TABLE>


<TABLE>
<CAPTION>
                                                              JUNE 30, 1997
                                                          -----------------------
                                                           ACTUAL  AS ADJUSTED(6)
                                                          -------- --------------
                                                          (DOLLARS IN THOUSANDS)
<S>                                                       <C>        <C>     
CONSOLIDATED BALANCE SHEET DATA:
Cash and cash equivalents .............................   $  5,987   $ 78,924
Pledged securities ....................................         --     47,000
Working capital .......................................      9,375     99,500
Property and equipment -- net .........................      8,080      8,080
Total assets ..........................................     32,986    157,986
Notes .................................................         --    120,814(7)
Common stock ..........................................        252        252
Additional paid-in capital ............................    145,030    149,216(7)
Total stockholders' equity ............................     20,849     25,035
</TABLE>

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

(1)  Per share data for 1994 reflects certain unaudited pro forma adjustments.
     See Notes 1 and 4, "Recapitalization" and "Earnings per Share",
     respectively, of the Notes to Consolidated Financial Statements as of
     December 31, 1995 and 1996 and for the years ended December 31, 1994, 1995
     and 1996.

(2)  Represents the number of Series 5000 Mobile Units in service at the end of
     the applicable period.


                                       16
<PAGE>   22

(3)  Represents the average number of minutes of service for a Series 5000
     Mobile Unit during the applicable period.

(4)  Represents the average service revenue per Series 5000 Mobile Unit
     recognized by the Company during the applicable period. Service revenues
     per Series 5000 Mobile Unit vary significantly depending upon whether the
     unit is serviced through the AT&T Complex or the NSC. In general, service
     revenues and related operating expenses are greater for units serviced
     through the NSC than for those serviced through the AT&T Complex. For new
     customers commencing service since july 1, 1996, all transmissions are
     routed through the NSC. See "Management's Discussion and Analysis of
     Financial Condition and Results of Operations -- General."

(5)  For purposes of calculating the ratio of earnings to fixed charges,
     earnings are defined as loss before income taxes and extraordinary item
     plus fixed charges. Fixed charges consist of interest expense, amortization
     of debt issuance costs, accretion of discount on preferred stock and a
     reasonable approximation of the interest factor included in rental payments
     on operating leases. Earnings were inadequate to cover fixed charges for
     the years ended December 31, 1994, 1995 and 1996 by $25,881,000,
     $26,397,000 and $29,743,000, respectively, and for the six months ended
     june 30, 1996 and 1997 by $13,268,000 and $14,017,000, respectively.

(6)  Adjusted to give effect to the Units Offering and the application of the
     net proceeds therefrom. See "Use of Proceeds."

(7)  The aggregate principal amount of the Notes is $125.0 million. The
     estimated value of the Warrants, $4,186,000, is reflected both as a debt
     discount and as an element of additional paid-in capital.


                                       17
<PAGE>   23

                                  RISK FACTORS

         In addition to the other information contained in this Prospectus, the
following risk factors should be considered carefully in evaluating the Company
and its business in connection with the Exchange Offer.

LIMITED OPERATING HISTORY; SIGNIFICANT LOSSES

         The Company commenced its operations in April 1992 and has a limited
operating history. The Company began offering its long-haul trucking application
on a commercial basis in September 1993. Since its inception, the Company has
experienced significant operating losses. In particular, the Company experienced
operating losses of $19.1 million, $22.2 million and $28.6 million in the years
ended December 31, 1994, 1995 and 1996, respectively, and an operating loss of
$14.5 million in the six months ended June 30, 1997. As of June 30, 1997, the
Company had an accumulated deficit of $123.9 million. In order to achieve a
profitable level of operations, the Company must significantly increase its
installed base of Series 5000 Mobile Units and generate substantially greater
service and airtime revenues. Although the Company's installed base of Series
5000 Mobile Units has increased significantly in each of the past three years,
the number of Series 5000 Mobile Units sold by the Company decreased from 9,322
in the year ended December 31, 1995 to 7,038 in the year ended December 31,
1996. This decrease was the result of various factors, including concerns on the
part of prospective customers relating to the Company's financial condition
during the first three quarters of 1996 and uncertainties related to the
termination effective June 29, 1996 of the Company's contract with AT&T relating
to the design and operation of the AT&T Complex. See "-- Availability of
Switching Complexes." Furthermore, the Company's results of operations have been
affected by its ongoing need for capital and perceptions on the part of certain
customers and prospective customers that this need for capital gives rise to
additional commercial risks in transacting business with the Company.
Historically, the Company's need for capital has been satisfied by sales of
equity securities and borrowings from certain major stockholders. There is no
assurance that the Company will be able to obtain capital in the future,
including from these sources, or that capital, if available, will be on terms
favorable to the Company. The Company expects to continue to incur losses and
negative cash flow from operations in the future and such losses may be greater
than those incurred in corresponding prior periods. There can be no assurance
that the Company's future operations will generate operating or net income or
positive cash flow from operations in any future period. The Company intends to
use a substantial portion of the proceeds from the Units Offering to fund future
operating losses. If the Company does not achieve significant operating and net
income and positive cash flow, it will not have the funds required to pay the
principal amount of the Notes at maturity or to make interest payments on the
Notes beyond the three-year period during which the payment of interest is
provided for through the Pledged Securities. The likelihood of the long-term
success of the Company must be considered in light of the expenses, difficulties
and delays frequently encountered in connection with the early stages of the
development and marketing of telecommunications products and services, as well
as the competitive environment in which the Company operates and the other risks
and uncertainties discussed in this Prospectus. See "Selected Financial Data,"
and "Management's Discussion and Analysis of Financial Condition and Results of
Operations."

SUBSTANTIAL LEVERAGE

         The Company has indebtedness that is substantial in relation to its
stockholders' equity. As of June 30, 1997, after giving effect to the Units
Offering, the Company on a consolidated basis had outstanding indebtedness with
a principal amount of $125.0 million ($120.8 million net of debt discount),
consisting entirely of the Old Notes, and stockholders' equity of $25.0 million.
In addition, as of June 30, 1997, after giving effect to the Units Offering, the
Company had a debt-to-equity ratio of 5.0 to 1.0 (based on the principal
amount). The Indenture permits the Company to incur additional indebtedness
under certain conditions, and the Company expects that it may incur additional
indebtedness to the extent it is permitted to do so.

         The Company is required to make semi-annual interest payments in
respect of the Notes of approximately $8.6 million. In all periods since its
inception, the Company has not generated sufficient earnings or cash flow from
operations to make such interest payments. Accordingly, the Company expects that
it will be necessary for its operating 


                                       18
<PAGE>   24

results to improve significantly in order to permit it to meet the debt service
obligations under the Notes beyond the period for which the payment of interest
on the Notes is provided for through the Pledged Securities. The ability of the
Company to improve its operating results will depend upon a variety of factors,
including economic, financial, competitive, regulatory and other factors beyond
its control. There can be no assurance that the Company will generate sufficient
earnings or cash flow from operations in the future to service the Notes and to
meet its working capital, capital expenditure and other requirements. If the
Company is unable to service the Notes using earnings or cash flow from
operations, it will have to examine alternate means of repayment that could
include restructuring or refinancing its indebtedness or seeking additional
sources of debt or equity financing. There can be no assurance either that the
Indenture would permit the Company to pursue alternative means of repayment or
that the Company would be able to effect such a restructuring or refinancing or
obtain such additional financing if permitted to do so.

         The Indenture imposes significant operating and financial limitations
on the Company. Such limitations will affect, and in many respects significantly
restrict or prohibit, among other things, the ability of the Company to pay
dividends, make investments and incur additional indebtedness. These
restrictions, in combination with the Company's substantial leverage, could
limit the ability of the Company to effect future financings or otherwise
restrict the nature and scope of its activities. The degree to which the Company
is leveraged could have important consequences to holders of Notes, including:
(i) the impairment of the Company's ability to obtain additional financing in
the future, (ii) the reduction of funds available to the Company for its
operations or for capital expenditures as a result of the dedication of a
substantial portion of the Company's net cash flow from operations to the
payment of principal of and interest on the Notes, (iii) the possibility of an
event of default under covenants contained in the Indenture, which could have a
material adverse effect on the Company, (iv) the placement of the Company at a
relative competitive disadvantage as compared to competitors who are not as
highly leveraged as the Company, and (v) the inability to adjust to rapidly
changing market conditions and consequent vulnerability in the event of a
downturn in general economic conditions or its business because of the Company's
reduced financial flexibility. In addition, to the extent that the Company
enters into a Bank Credit Agreement (as defined herein) in the future as
permitted by the Indenture, such agreement is likely to impose additional
operating and financial restrictions on the Company, which may be more
restrictive than those provided for in the Indenture. See "Selected Financial
Data," "Management's Discussion and Analysis of Financial Condition and Results
of Operations," and "Description of Exchange Notes."

AVAILABILITY OF SWITCHING COMPLEXES

         From 1993 through mid-1996, the Company and AT&T were parties to a
contract (the "AT&T Contract") pursuant to which AT&T provided enhanced call
processing and data management services and long-distance network transport for
the Company and its customers through the AT&T Complex. AT&T terminated the AT&T
Contract effective as of June 29, 1996. However, AT&T continues to provide
services for existing customers of the Company and AT&T without a formal
contract in fulfillment of AT&T's obligations under existing service agreements
entered into with each customer. At June 30, 1997, approximately 50% of the
Company's installed base of Series 5000 Mobile Units were receiving services
provided through the AT&T Complex. The Company is in the process of switching
over its customers from the AT&T Complex to the NSC. In September 1997, AT&T
notified the Company that it would discontinue offering services through the
AT&T Complex as of December 31, 1997. Until such time as all customers are being
serviced through the NSC, it will be necessary for the Company and AT&T to
cooperate with respect to a number of operational and other matters. There can
be no assurance that the Company and AT&T will cooperate with respect to these
matters or that AT&T will not attempt to alter the terms of the existing
arrangements under which the parties jointly provide their services to
customers. Any failure or refusal on the part of AT&T to cooperate with the
Company or any attempt on the part of AT&T to alter in any significant respect
the terms of its existing arrangements with the Company could have a material
adverse effect on the Company's business, financial condition or results of
operations. See "-- AT&T Litigation" below.

         In the third quarter of 1996, the Company began commercial service with
the NSC, which was designed and constructed for the Company by IEX Corporation
("IEX"). For new customers commencing service since July 1, 1996, the NSC has
fully replaced the AT&T Complex. The future growth of the Company's business
will depend to a 


                                       19
<PAGE>   25

significant extent on its ability to continue to expand the capacity of the NSC
and to resolve technical and operational issues which may arise from time to
time in connection with the operation, management and expansion of a switching
complex of this complexity. The Company has already started this expansion
process. Increasing the capacity of the NSC will require capital expenditures of
several million dollars over the next few years. In addition, when AT&T ceases
to provide the services described above through the AT&T Complex, the NSC will
have to provide such services to the customers currently using the AT&T Complex.
Although the Company believes that the NSC as currently configured will be able
to handle such increased capacity, the NSC has not previously provided service
at such a level of use. See "Business -- Infrastructure and Operations."

NO REMOTE DISASTER RECOVERY SYSTEM

         At the present time, the Company's disaster recovery systems focus on
internal redundancy and diverse routing within each of the complexes operated by
or for the Company. However, the Company does not currently have access to a
remote back-up complex that would enable it to continue to provide mobile
communications services to customers in the event of a natural disaster or other
occurrence that rendered unavailable either the AT&T Complex or the NSC.
Accordingly, the Company's business is subject to the risk that such a disaster
or other occurrence could hinder or prevent the Company from continuing to
provide services to some or all of its customers. See "Business --
Infrastructure and Operations."

SWITCHING COMPLEX OPERATIONAL DIFFICULTIES

         Under the terms of the AT&T Contract, AT&T was obligated to maintain
the AT&T Complex in operational status. However, from inception of service, the
AT&T Complex experienced various service impairments, including occasional
"downtime" periods ranging from several minutes to several hours in duration. In
general, although in recent months AT&T has made modifications to the AT&T
Complex which are intended to improve its performance, there can be no assurance
that the AT&T Complex will not experience performance problems in the future.
The Company does not have access to maintain the AT&T Complex. Accordingly, when
operational problems arise concerning the AT&T Complex, the Company must rely on
AT&T to correct those problems in a timely fashion.

         As noted above, the NSC began commercial service in the third quarter
of 1996. Other than the normal operational issues encountered in placing in
service a complex facility of this type, the addition of new customers to the
NSC has been progressing in an orderly fashion and the NSC has not experienced
unusual or severe service impairments. However, there also can be no assurance
that the NSC will not experience performance and other operational problems in
the future.

         Any significant performance or other operational problems affecting
either the AT&T Complex or the NSC could have a material adverse effect on the
Company's business, financial condition and results of operations. See "Business
- -- Infrastructure and Operations."

AT&T LITIGATION

         On February 16, 1996, the Company filed a lawsuit against AT&T in the
U.S. District Court, Northern District of Texas, Dallas Division. The Company is
seeking preliminary and permanent injunctive relief restraining AT&T from using
and disclosing the Company's trade secrets and proprietary information relating
to its mobile communications technology. In July 1996, AT&T filed counterclaims
essentially mirroring the Company's claims. Both the Company and AT&T claim
ownership of trade secrets and proprietary information related to the design and
function of the Company's mobile communications unit and dispatcher software and
certain methods developed to prevent fraudulent use of the system.

         In September and October 1996, both the Company and AT&T amended their
pleadings and filed additional claims against each other related to breach of
contract and various tortious activities. AT&T seeks an injunction 


                                       20
<PAGE>   26
preventing the Company from using or disclosing AT&T's alleged trade secrets, a
declaratory judgment defining the parties' intellectual property rights, actual
and punitive damages and attorneys' fees in connection with its counterclaims.
The Company seeks a declaration that the patents issued to AT&T using the
Company's proprietary information are invalid or, alternatively, should be
transferred from AT&T to the Company, and that certain actual or threatened AT&T
conduct infringes the Company's patents. The Company also brought claims against
AT&T pursuant to the Texas Deceptive Trade Practices Act ("DTPA") and seeks
actual, punitive and treble damages and attorneys' fees in connection with its
claims. Additionally, the Company's amended complaint added another defendant,
Lucent Technologies, Inc. ("Lucent"), to which AT&T transferred certain of the
patents at issue in the lawsuit. Both the Company and AT&T seek substantial
monetary damages.

         In November 1996, AT&T filed a partial motion to dismiss the Company's
DTPA claims, various tort claims and the patent invalidity charges.
Additionally, in November 1996, Lucent filed a motion to dismiss all of the
Company's claims against Lucent. In December 1996, the Company filed a response
to AT&T's partial motion to dismiss and a response to Lucent's motion to
dismiss. Supplemental briefing on the motions is anticipated and a decision is
expected in the near future.

         The claims made by AT&T in its pending litigation with the Company, if
resolved in a manner adverse to the Company, could have a material adverse
effect on the Company and its business, financial condition and results of
operations. See "Business -- Legal Proceedings."

UNCERTAINTY REGARDING PATENTS AND PROPRIETARY RIGHTS

         The Company's success depends upon its technology and the scope and
limitations of its proprietary rights therein. In order to protect its
technology, the Company relies on a combination of patents, copyrights and trade
secret laws, as well as certain customer licensing agreements, employee and
third-party confidentiality and non-disclosure agreements and other similar
arrangements. There can be no assurance that the means employed by the Company
to protect its proprietary rights will be adequate. If the Company's assertion
of proprietary rights is held to be invalid or if another person's use of the
Company's technology were to occur to any substantial degree, the Company's
business, financial condition and results of operations could be materially
adversely affected.

         The Company holds ten domestic patents and has applied for several
additional domestic and foreign patents. In general, the Company's existing
patents relate to certain methods and apparatus of the HighwayMaster system for
locating and communicating with vehicles utilizing the cellular communications
network. The Company's software is also entitled to certain protections under
state trade secret law and federal copyright law.

         The patents and other intellectual property rights of the Company
cannot prevent competitors from developing competing systems using other
land-based wireless communications systems or using the cellular system through
a different method. While the Company believes that the nature and scope of the
HighwayMaster communications system, including the Company's strategic business
and technological relationships, would be difficult for a competitor to
duplicate, there can be no assurance that a competitor would consider these
hindrances to be material in light of the market potential. A competitor could
invest time and resources in an attempt to duplicate certain key features of the
Company's products and services, which could result in increased competition and
have a material adverse effect on the Company's business.

         Several of the Company's competitors have obtained and can be expected
to obtain patents that cover products or services directly or indirectly related
to those offered by the Company. There can be no assurance that the Company is
aware of all patents containing claims that may pose a risk of infringement by
its products or services. In addition, patent applications in the United States
are confidential until a patent is issued and, accordingly, the Company cannot
evaluate the extent to which its products or services may infringe on future
patent rights held by others. In general, if it were determined that any of the
Company's products, services or planned enhancements infringed valid patent
rights held by others, the Company would be required to cease marketing such
products or services or developing such 


                                       21
<PAGE>   27

enhancements, to obtain licenses (which might require the payment of royalties)
to develop and market such products, services or enhancements from the holders
of the patents or to redesign such products or services to avoid infringement.
In such event, the Company also might be required to pay past royalties or other
damages. There can be no assurance that the Company would be able to obtain
licenses on commercially reasonable terms, or that it would be able to design
and incorporate alternative technologies, without a material adverse effect on
its business.

         AT&T has filed applications for patent protection with respect to
certain functions of the AT&T Complex and has obtained certain patents which
appear to overlap with patents issued to the Company, some of which have been
assigned by AT&T to Lucent. In addition, AT&T has asserted that it has certain
other proprietary rights relating to the AT&T Complex. In connection with the
pending litigation between the Company and AT&T, neither AT&T nor Lucent has
asserted any patent claims against the Company. However, there can be no
assurance that they will not attempt to do so in the future. In connection with
the operation of the NSC or other future activities of the Company, there can be
no assurance that the Company (if it were required to do so pursuant to patent
or other purported rights of AT&T) would be able to obtain licenses from AT&T on
commercially reasonable terms, or that it would be able to design and
incorporate alternative technologies, without a material adverse effect on its
business, financial condition and results of operations. The Company has filed a
lawsuit against AT&T and Lucent with respect to these proprietary rights and
AT&T has countersued the Company. See "-- AT&T Litigation."

LIMITED SIZE OF PRIMARY TARGET MARKET

         The only product currently offered by the Company to customers in the
long-haul trucking market is the Series 5000 Mobile Unit. Although the Company
expects to generate sales of Series 5000 Mobile Units in all sectors of the
long-haul trucking market, the Company's primary target market for this product
is operators of mid- and large-sized fleets consisting of larger-sized trucks
used in long-haul transport. Based on the Department of Commerce Census,
management estimates that there are approximately 530,000 trucks in this primary
target market, of which approximately 30% are currently equipped with some form
of integrated mobile communications solution. Because of the limited size of the
primary target market for Series 5000 Mobile Units, management believes that, in
order to achieve a profitable level of operations in the long-haul trucking
market, it will be necessary for the Company to achieve significant levels of
penetration in its primary target market, as well as to effect substantial sales
of the Series 3000 Mobile Units in other sectors of the long-haul trucking
market.

EARLY STAGES OF PRODUCT DEVELOPMENT

         The Series 3000 Mobile Unit and AutoLink product described in this
Prospectus are both in the early stages of product development. Development of
the hardware component for the Series 3000 Mobile Unit is at a very early stage,
although it is expected to benefit substantially from the ongoing development
work taking place in connection with launch of the AutoLink service. The
software component of the Series 3000 Mobile Unit is currently in the design
stage and has yet to be loaded onto and tested in conjunction with the product's
hardware component. The Company expects that the hardware component of the
Series 3000 Mobile Unit will be manufactured by a third-party hardware supplier
in accordance with the Company's specifications. The Company is currently
negotiating with Motorola to manufacture the hardware component for the Series
3000 Mobile Unit. However, at the present time, the Company has not obtained a
commitment from Motorola or any other supplier to manufacture this hardware
component. In general, there can be no assurance that the Company will be able
to make satisfactory arrangements with third-party hardware suppliers to
manufacture the Series 3000 Mobile Unit. The Company's strategy for the
marketing of the Series 3000 Mobile Unit has not yet been tested or implemented,
and there can be no assurance that the Company will be successful in achieving
substantial sales of the Series 3000 Mobile Unit at any time in the future if at
all. See "Business -- Products and Services -- Series 3000" and "-- AutoLink."

         The AutoLink product is currently in the design stage. Prince is
currently engaged in designing the end-user interface for this product. In
addition, the Company and Prince are currently involved in negotiations with
Motorola, which would be responsible for manufacturing the in-vehicle
communications and location hardware for the AutoLink 


                                       22
<PAGE>   28

product in accordance with their specifications. There can be no assurance that
these negotiations will be successful or that the Company and Prince will be
able to make satisfactory arrangements with Motorola or any other third-party
hardware supplier. The software component to be loaded onto the AutoLink product
is still being designed and is yet to be tested in conjunction with the
hardware. Extensive testing of the AutoLink product will be required in
real-time conditions before it is ready for launch. Any delay in the development
or testing of either the hardware or software components for the AutoLink
product could significantly delay its projected launch dates. Moreover, in order
to launch the AutoLink product, it will be necessary for the Company to make
certain changes to the terms of its contracts with cellular carriers and other
third parties to enable the Company to utilize its network to provide emergency
and roadside assistance services to motorists in their home markets. The
proposed strategy for the marketing of the AutoLink product has not yet been
tested or implemented. Although the Company has entered into a memorandum of
understanding with CellStar which contemplates that CellStar will act as the
exclusive distributor for the AutoLink product in the after-market, the Company
has not entered into a definitive agreement that obligates CellStar or any other
cellular distributor or cellular carrier to assist the Company in distributing
the AutoLink product in the aftermarket and there is no assurance that it will
be able to do so. There can be no assurance that the Company and Prince will be
successful in achieving substantial sales of the AutoLink product in either the
OEM market or the after-market at any time in the future. See "-- Network
Enhancement; Need to Modify Contractual Relationships" and "Business -- Products
and Services -- AutoLink."

DEPENDENCE ON CELLULAR INFRASTRUCTURE

         The Company utilizes the existing cellular telephone infrastructure,
with certain enhancements, as the wireless segment of the HighwayMaster network.
In most cases, current terms of contracts between the Company and each of its
cellular carriers are for one year, with automatic one-year successive renewal
terms, unless either party elects to terminate the contract upon 30-days' notice
prior to June 30 of each year. The Company has recently executed new contracts
with certain of its cellular carriers that are substantially similar to the
existing contracts, except that they provide for an initial three-year term. In
order to continue to provide mobile communications services to its customers,
the Company must continue to renew its agreements with individual cellular
carriers. If the Company is unable to renew or replace its contracts with
cellular carriers at competitive rates, the Company may be forced to absorb the
costs of increased cellular air time rates, or increase rates to customers where
allowed by individual contracts. In general, a failure on the part of the
Company to renew or replace its contracts with cellular carriers on favorable
terms could have a material adverse effect on its business, financial condition
and results of operations.

         Under the terms of existing cellular contracts, a cellular carrier
generally agrees to provide cellular service to customers of the Company, on a
roaming basis, so long as such customers are (i) vehicles used in long-haul
trucking and (ii) certain recreational vehicles for which a specified portion of
cellular airtime usage occurs in multiple markets. As a result, in order to
begin offering the AutoLink service on a commercial basis, it will be necessary
for the Company to amend its contracts with cellular carriers to allow the
Company to utilize their cellular systems to provide emergency and roadside
assistance service to motorists in their home markets. The Company has begun to
seek amendments to its contracts with cellular carriers and to date has amended
the contracts with more than 35 carriers. However, there can be no assurance
that it will be able to obtain amendments covering all areas in which it
currently provides mobile communications services to long-haul trucks. The
Company's agreements with cellular carriers provide that the Company will not be
required to reimburse carriers for fraudulent usage unless the carriers have
fully implemented the Company's protocol. Although the Company's protocol has
been effective to prevent fraud to date, there is no assurance that this will be
the case in the future.

         The HighwayMaster network relies on the continued interconnectivity of
its cellular service providers. Currently, cellular carriers utilize analog
technology, although an increasing number of carriers have upgraded or are in
the process of upgrading their service to digital technology. If in the future
cellular carriers do not continue to offer service to analog telephones, the
Company would be required to dedicate financial resources and engineering staff
to integrate a digital cellular telephone transceiver into its products.
Furthermore, if substantial changes to the methods of interconnection utilized
by cellular carriers occur, such as a discontinuance of the existing out-of-area
call clearing 


                                       23
<PAGE>   29

system or a decision by cellular carriers to eliminate analog service and employ
several diverse digital technologies rather than a common digital technology,
the Company may be required to undertake costly system redesign or may encounter
difficulty in providing nationwide coverage. See "Business -- Infrastructure and
Operations."

DEPENDENCE ON CLEARINGHOUSE SERVICES

         GTE Telecommunications Services Incorporated ("GTE-TSI") performs
certain "clearinghouse" functions for the Company, which include, among other
things, validation and verification of roaming numbers and provision of certain
call delivery information. The Company's agreement with GTE-TSI is effective for
an initial term ending March 14, 1998, with certain renewal options by the
Company after that date. The agreement provides for mutual exclusivity in the
trucking industry for the initial term with respect to certain key call delivery
features. The agreement with GTE-TSI may be renewed by the Company for up to ten
additional one-year terms after expiration at a reasonable price to be
determined solely by GTE-TSI. There can be no assurance that the renewal price
determined by GTE-TSI after the initial three-year term will be acceptable to
the Company.

         A subsidiary of Electronic Data Systems Corporation ("EDS") also
performs certain "clearinghouse" functions for the Company which include, among
other things, the validation of roaming numbers and routing of call delivery
information. The agreement with EDS expires on October 24, 1998 with successive
automatic one-year renewal terms thereafter, unless terminated at the option of
either party upon 60-days' notice prior to any expiration date. There can be no
assurance that the EDS agreement will be renewed upon expiration.

         If the Company is unable to renew its agreement with GTE-TSI or, to a
lesser extent, EDS, the Company may be required to make substantial and costly
design changes to the HighwayMaster network in order to ensure continued
availability of the Company's services. Because of the unique position of
GTE-TSI and EDS as industry-wide clearinghouses and the difficulty associated
with their replacement, there can be no assurance that full functionality of the
system could be maintained if such a redesign were necessary.

         A separate subsidiary of GTE, GTE Wireless, provides certain other
services to the Company, principally the direct payment of the Company's
cellular service providers for cellular airtime, under a contract scheduled to
expire in March 1999. The failure to renew this contract and continue existing
arrangements for payment to the Company's cellular service providers could
require the Company to post security deposits or provide other financial
assurances, which could have a material adverse effect on its business,
financial condition or results of operations. See "Business -- Infrastructure
and Operations."

COSTS RELATED TO BILLING DISCREPANCIES

         The Company's ability to operate its business on a profitable basis
will depend in part upon whether it is able to monitor and control effectively
the direct costs of providing services to its customers, including cellular air
time charges. The Company periodically analyzes the charges billed to the
Company by GTE Wireless on behalf of cellular carriers in order to obtain the
appropriate amount of credit for any invalid air time usage charges billed to
the Company. Furthermore, the Company incurs certain valid airtime usage charges
that are not billable to customers under current billing practices. During the
three months ended June 30, 1997, the Company recorded an adjustment to increase
cellular airtime cost, a component of cost of service revenue, based on new
billing data received in July 1997. This new billing data indicated that the
portion of airtime usage not billable to customers is higher than previously
believed by the Company and used as the basis for recording accounting
estimates. The Company is currently in the process of evaluating the factors
underlying the increase in cellular airtime costs and will attempt to identify
technical adjustments and modifications that may enable it to improve its
service gross profit margin. At the present time, the Company's evaluation of
these factors is in its preliminary stages and there can be no assurance that
the Company's results of operations in future periods will not be impacted by
the same or similar factors. In addition, there can be no assurance that the
Company will not incur significant costs in the future in connection with
billing discrepancies or the reconciliation process or that the costs will not
have an adverse impact on the Company's ability to achieve and maintain


                                       24
<PAGE>   30

satisfactory profit margins. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations."

NETWORK ENHANCEMENT; NEED TO MODIFY CONTRACTUAL RELATIONSHIPS

         The Company expects to utilize its existing network to provide the
AutoLink service to motorists in the United States and Canada and to pursue
additional business opportunities in the future. However, certain modifications
will need to be made to the Company's contracts with cellular carriers and other
third parties to enable the Company to utilize its network for such purposes.
For example, in order to provide the AutoLink service, the Company must amend
its contracts with cellular carriers to permit the use of their cellular systems
to provide emergency and roadside assistance to motorists in their home markets.
See "-- Dependence on Cellular Infrastructure." In addition, it will be
necessary for the Company to make certain changes to the terms of its contracts
with GTE-TSI and EDS to provide that such companies will perform the same
"clearinghouse" functions for the AutoLink service as they currently do in the
long-haul trucking market. Furthermore, GTE Wireless has advised the Company
that it intends to seek amendments to its current contracts with cellular
carriers relating to the direct payment of airtime charges in order to ensure
that they cover the AutoLink service. There can be no assurance that all
amendments will be obtained which are needed to enable the Company to provide
the AutoLink service on a nationwide basis or to pursue any additional business
opportunities described in this Prospectus. In order to provide the AutoLink
service, the Company will also need to construct a new switching complex as
contemplated in the existing joint development agreement between the Company and
Prince. See "Business -- Products and Services -- AutoLink," "Business --
Infrastructure and Operations" and "Business -- Additional Business
Opportunities."

NO LONG-TERM PRODUCT SUPPLY ARRANGEMENTS

         The Company does not have the ability to manufacture or assemble the
Series 5000 Mobile Units. Sanmina Corporation ("Sanmina") has assembled Series
5000 Mobile Units for the Company in accordance with its specifications since
the fourth quarter of 1996, when Sanmina acquired certain assets of the
Company's previous supplier, which was in bankruptcy. To the extent that the
Company is dependent on a single supplier to manufacture and assemble the Series
5000 Mobile Units, the possibility exists that problems experienced by the
supplier could adversely affect the Company. The Company recently entered into
an agreement with K-Tec Electronics Corporation ("K-Tec") for the assembly of
the Series 5000 Mobile Units and the initial version of the Series 3000 Mobile
Units. In the future, the Company plans to order Series 5000 Mobile Units from
both Sanmina and K-Tec. Additionally, the Company subcontracts for the
manufacture of various components for the Series 5000 Mobile Units from various
suppliers. All transceivers for the Series 5000 Mobile Units are manufactured by
Motorola, and the Company believes that there is a limited number of suppliers
who are capable of manufacturing transceivers that meet the Company's
requirements. In general, the failure to maintain or establish satisfactory
arrangements for the production and assembly of Series 5000 Mobile Units could
have a material adverse effect on the Company's business, financial condition
and results of operations.

         In connection with proposed launch of the advanced versions of the
Series 3000 Mobile Units and AutoLink products, it will be necessary for the
Company to make arrangements with one or more third-party hardware suppliers to
manufacture the hardware components of these products in accordance with the
Company's specifications. Although the Company is currently negotiating with
Motorola to manufacture the hardware component for these products, the Company
has not obtained a commitment from Motorola or any other hardware supplier with
respect to the manufacture of these products. In general, there can be no
assurance that the Company will be able to make arrangements with a third-party
hardware supplier or suppliers to manufacture the hardware components of the
advanced versions of the Series 3000 Mobile Units and AutoLink products or, if
it is successful in making such arrangements, as to the terms thereof.

                                       25
<PAGE>   31
CONTROL OF THE COMPANY

         The Company, SBC, the Erin Mills Stockholders (as defined herein), the
Carlyle Stockholders (as defined herein), the By-Word Stockholders (as defined
herein) and certain other persons are parties to an Amended and Restated
Stockholders' Agreement, dated as of September 27, 1996 (the "Amended
Stockholders' Agreement") which amends and restates in its entirety the
Stockholders' Agreement dated February 4, 1994. The parties to the Amended
Stockholders' Agreement beneficially own an aggregate of 19,625,129 shares of
Common Stock, representing approximately 79.0% of the shares outstanding as of
December 31, 1996.

         The Amended Stockholders' Agreement contains provisions relating to,
among other things, the election of members of the Company's Board of Directors.
In particular, this agreement provides that the parties will take all action
(including the voting of shares of Common Stock owned by them) necessary to
ensure that the Board of Directors of the Company consists of (i) two directors
designated by the Erin Mills Stockholders, (ii) one director designated by the
Carlyle Stockholders, (iii) two directors designated by the By-Word Stockholders
and (iv) two independent directors. Each of the parties has designated the
number of directors specified in the Amended Stockholders' Agreement, except
that the Carlyle Stockholders have declined to exercise their right to designate
a director. In addition, the Company has not yet designated a second independent
director but intends to do so as promptly as practicable. Prior to the receipt
of regulatory relief ("Regulatory Relief") permitting SBC to provide landline,
interLATA long-distance service pursuant to the Communications Act of 1934, as
amended by the Telecommunications Act (as defined herein), SBC will not be
entitled to designate a director, but will have the right to designate a
non-voting delegate who will attend all meetings of the Board of Directors and
receive all materials distributed to directors of the Company. Upon the
conversion of Series D Preferred Stock (as defined herein) into Class B Common
Stock (as defined herein), which will occur upon receipt of Regulatory Relief,
SBC will be entitled to designate one member of the Board of Directors of the
Company. In addition, if SBC and its affiliates beneficially own 20% or more of
the outstanding Common Stock on a fully diluted basis (including shares issuable
upon conversion or exercise of outstanding options, warrants or rights, but
excluding shares issuable upon the conversion or exercise of the SBC Warrants
(as defined herein) or of options, warrants or rights issued by any person other
than the Company), SBC will under certain circumstances be entitled to designate
a second member of the Board of Directors.

         As a result of the provisions of the Amended Stockholders' Agreement
and the number of shares of Common Stock owned by the stockholders who are
parties thereto, these stockholders, if they choose to act together, have the
ability to control the management and policies of the Company. See "Certain
Relationships and Related Party Transactions -- Amended Stockholders'
Agreement."

REPURCHASE OF EXCHANGE NOTES UPON CHANGE OF CONTROL

         Upon the occurrence of a Change of Control, the Company will be
required to offer to repurchase all of the outstanding Notes at a price equal to
101% of the principal amount thereof, plus accrued and unpaid interest and
Liquidated Damages, if any, to the repurchase date. There can be no assurance
that the Company would have sufficient resources to repurchase the Notes upon
the occurrence of a Change of Control. The failure to repurchase all of the
Notes tendered to the Company would constitute an Event of Default under the
Indenture. Furthermore, the repurchase of the Notes by the Company upon a Change
of Control might result in a default on the part of the Company in respect of
other future indebtedness of the Company, as a result of the financial effect of
such repurchase on the Company or otherwise. The change of control repurchase
feature of the Notes may have anti-takeover effects and may delay, defer or
prevent a merger, tender offer or other takeover attempt. See "Description of
Exchange Notes."

FRAUDULENT CONVEYANCE CONSIDERATIONS

         The obligations of the Company under the Old Notes are and under the
Exchange Notes will be guaranteed by HMC, the Initial Restricted Subsidiary, and
will be guaranteed by all future Restricted Subsidiaries of the Company. It is
possible that creditors of a Restricted Subsidiary may challenge the Subsidiary
Guarantee issued by it as a fraudulent 


                                       26
<PAGE>   32

conveyance under applicable provisions of the United States Bankruptcy Code or
comparable provisions of federal and state statutes. The requirements for
establishing a fraudulent conveyance vary depending on the laws of the
applicable jurisdiction. If a court found, under relevant federal and state
fraudulent conveyance statutes in a bankruptcy, reorganization or rehabilitation
case or similar proceeding or lawsuit by or on behalf of unpaid creditors of the
Company or the Restricted Subsidiaries, that at the time a Subsidiary Guarantee
was issued that (i) the applicable Restricted Subsidiary issued its Subsidiary
Guarantee with the intent of hindering, delaying or defrauding current or future
creditors or (ii) the applicable Restricted Subsidiary received less than
reasonably equivalent value or fair consideration for issuing its Subsidiary
Guarantee and (A) was insolvent or was rendered insolvent by reason of the sale
of the Notes or issuance of the Subsidiary Guarantee, (B) was engaged, or about
to engage, in a business or transaction for which its assets constituted
unreasonably small capital or (C) intended to incur, or believed that it would
incur, debts beyond its ability to pay such debts as they matured (as all of the
foregoing terms are defined in or interpreted under such fraudulent conveyance
statutes), such court could void or rescind or reduce such Subsidiary Guarantee
or take other action detrimental to the rights of the holders of the Notes,
including invalidating such Subsidiary Guarantee and requiring the holders of
the Notes to return amounts previously paid in respect of the Notes to the
extent such payments were made by, or derived from the assets of, the Restricted
Subsidiary whose Subsidiary Guarantee was voided, rescinded or reduced. Among
other things, a legal challenge of a Subsidiary Guarantee on fraudulent
conveyance grounds may focus on the benefits, if any, realized by such
Restricted Subsidiary as a result of the issuance by the Company of the Notes.
To the extent a Subsidiary Guarantee is voided as a fraudulent conveyance or
held unenforceable for any other reason, the holders of the Notes would cease to
have any claim in respect of the assets of such Restricted Subsidiary. The
measure of insolvency under applicable law will vary depending upon the law
applied in such case. Generally, however, a Restricted Subsidiary would be
considered insolvent if at the time it issued its Subsidiary Guarantee or made
any payments in respect thereof, either (i) the fair market value (or fair
salable value) of its assets was less than the amount required to pay its total
existing debts and liabilities (including the probable liability on contingent
liabilities) as they become absolute and matured or (ii) it was incurring debts
beyond its ability to pay as such debts matured. See "Description of Exchange
Notes."

HOLDING COMPANY STRUCTURE

         The Company is a holding company and substantially all of its
operations are conducted through HMC, to which the Company contributed most of
the proceeds that it received from the sale of the Units. If the Subsidiary
Guarantee of HMC were not enforced for any reason, the Company's cash flow and,
consequently, its ability to service its indebtedness, including the Notes,
would be dependent on its ability to gain access to the cash flow of HMC
(whether through loans, dividends, distributions or otherwise) and would be
subject to any legal, contractual or other restrictions that could hinder or
prevent the Company from doing so. HMC is a separate and distinct legal entity
from the Company and, except under the terms of its Subsidiary Guarantee, has no
obligation, contingent or otherwise, to pay any amounts due in respect of the
Notes or to make any amounts available for the payment thereof. In addition,
many jurisdictions recognize suretyship defenses available to a guarantor such
as HMC which could create an impediment to the enforcement of its Subsidiary
Guarantee. Although HMC will generally waive all such defenses, there can be no
assurance that such waivers will be enforceable. In general, if the Subsidiary
Guarantee issued by HMC were not enforced for any reason, the Notes would be
effectively subordinated to all indebtedness and other obligations of HMC to
other third parties.

         With respect to any future subsidiary of the Company that is not a
Restricted Subsidiary, the holders of the Notes will have no direct claim
against the assets of such future subsidiary and such future subsidiary will
have no obligation in respect of the payment of the principal amount of or
interest on the Notes. Any claim that the Company might have by virtue of its
status as a stockholder of such subsidiary would be effectively subordinated to
the claims of every creditor of such subsidiary, including trade creditors and
the holders of subordinated indebtedness of such subsidiary. Any intercompany
obligations that such future subsidiary owed to the Company could also be
subordinated or treated as equity claims under the laws of the applicable
jurisdiction. See "--Fraudulent Conveyance Considerations" and "Description of
Exchange Notes."


                                       27
<PAGE>   33

COMPETITION AND TECHNOLOGICAL CHANGE

         The Company faces competition from various other suppliers of mobile
communications services. Currently, the Company's primary competitors in the
long-haul trucking market offer data- only, two-way communications via
satellite. Other companies that compete or are planning to compete with the
Company in its target market also offer or plan to offer satellite-based voice
and data communication systems. The primary advantage of satellite-based
communication over the Company's cellular-based system is that satellite
coverage is available in certain remote areas and foreign countries that have
not developed cellular networks, enabling data transmissions in areas not served
by cellular systems. In addition, satellite-based communication systems
generally utilize a less complicated infrastructure than the Company's network
and may be able to make updates and changes to their system more quickly than
the Company.

         Certain technological advances and future product offerings could
substantially change the nature of the Company's competition. For example,
geo-stationary orbit, MEO and LEO satellite systems are expected to offer voice
and data communications that could compete directly with existing cellular-based
services, including the HighwayMaster system. One of the Company's current
competitors, American Mobile Satellite Corporation ("AMSC"), launched a
geo-stationary satellite in 1995 and offers both data and voice communications.
In addition, networks of MEO and LEO satellites are in the early implementation
stage, funded by consortiums of companies that intend to provide worldwide voice
communication capability. A useable portion of one or more of such networks is
projected to be in place by the year 2000. The addition of voice capability to
satellite systems may reduce the Company's competitive advantage over certain of
its competitors, and it is possible that satellite owners may, at least on a
temporary basis, offer rates at or below the Company's rates.

         Certain conventional mobile radio and ESMR providers offer digital
services that are competitive with current cellular services, including the
HighwayMaster system. If ESMR providers expand coverage and establish a
significant degree of uniformity, through uniform use of proprietary digital
technology or otherwise, ESMR providers could eventually develop an integrated
network to allow nationwide roaming. ESMR operators also intend to offer
dispatching services, data transmission and other services through their
expanding networks that could compete with the Company's services. One
telecommunications company already has implemented a system of nationwide
roaming limited to densely populated urban areas where it has built out its
network. Several other cellular carriers are currently in various stages of
implementing similar systems.

         Although current nationwide autonomous-registration incoming call
delivery systems offered by the cellular industry are costly and are unavailable
in some rural areas, the cellular industry may eventually develop a uniform
standard for incoming call delivery at a reduced cost. If inexpensive
autonomous-registration incoming call delivery systems for cellular roamers
become standard, this feature of the Company's services may provide less of a
competitive advantage. Moreover, if cellular carriers were to develop additional
standard protocol and hardware for inexpensive data transmission and fraud
control or if the cost of roaming services were to significantly decline, other
competitive advantages of the Company's system would be reduced. As the Company
begins to offer the Series 3000 Mobile Unit, it will increasingly face
competition from traditional cellular carriers.

         In general, technology in the wireless communications industry is in a
rapid and continuing state of change as new technologies and enhancements to
existing technologies continue to be introduced. The Company believes that its
future success will depend upon its ability to develop and market products and
services that meet changing customer needs and which anticipate or respond to
technological changes on a timely and cost-effective basis. There can be no
assurance that the Company will be able to keep pace with technological
developments.

         Other services are being proposed that could potentially compete with
the Company's products and services. The Federal Communications Commission
("FCC") currently is considering whether to allocate 75 megahertz of spectrum in
the 5.850-5.925 GHz band to establish dedicated short range communications
("DSRC") systems for the 


                                       28
<PAGE>   34

deployment of intelligent transportation systems to provide terrestrial wireless
communication links between vehicles traveling at highway speeds and roadside
systems. Current DSRC-based services include electronic toll payment and
commercial vehicle electronic clearance. Emerging DSRC services include en-route
driver information, freight mobility tracking, traffic control, and automated
roadside safety inspection, which may compete with the HighwayMaster system.

         Certain of the Company's competitors, including Qualcomm, Inc.
("Qualcomm"), have significantly greater name recognition, financial and other
resources than the Company. Among other things, it appears that certain of these
resources have been or are being used by Qualcomm and other competitors of the
Company to subsidize initial hardware purchases and provide extended periods of
free services in an attempt to achieve rapid penetration of the Company's target
market. See "Business -- Competition."

BACKLOG; NO FIRM DELIVERY DATES

         As of June 30, 1997, the Company had a backlog of 9,059 Series 5000
Mobile Units on order by its customers. The Company's order backlog is based
upon signed contracts pursuant to which customers have agreed to purchase the
applicable Series 5000 Mobile Units and install them in their fleets of
long-haul trucks (although in a limited number of cases the obligation to take
delivery of Series 5000 Mobile Units is subject to satisfactory completion of a
test program). Customer contracts generally do not specify delivery dates and,
as a result, the exact timing of delivery and installation of the Series 5000
Mobile Units ordered by customers is frequently the subject of further
discussions and negotiations between the Company and its customers.
Historically, not all Series 5000 Mobile Units included in the Company's backlog
have resulted in product sales, as a result of a variety of factors such as
financial difficulties and fleet downsizings experienced by customers, technical
difficulties arising with respect to the development of satisfactory interfaces
between the Series 5000 Mobile Units and customers' dispatch software and
certain operational and other disagreements arising from time to time between
the Company and its customers. Although the Company believes that the terms of
its customer agreements are binding, the Company generally attempts to work with
customers to reach a mutually satisfactory schedule for the delivery of the
Series 5000 Mobile Units and to resolve any operational or other issues that may
delay or impede the delivery or installation thereof. The Company makes periodic
adjustments to its order backlog to eliminate therefrom any Series 5000 Mobile
Units as to which substantial doubt exists regarding whether the customer
intends to take delivery thereof. In general, there can be no assurance that
customers will take delivery of all Series 5000 Mobile Units included in the
Company's order backlog.

UNCERTAINTY OF GOVERNMENT REGULATION

         The Company believes that the nature of its services does not require
the Company to be classified as a common carrier for either wireless or
long-distance regulatory purposes. This conclusion is based on several
alternative regulatory interpretations, including the classification of the
HighwayMaster service as a private network whose service is not offered to the
public at large, but rather targeted to specific users such as the long-haul
trucking industry and other owners of commercial vehicles. In addition, each
customer arrangement is tailored to fit the communication needs of that
particular customer. Alternatively, the Company can be classified as an enhanced
services provider, and thus not subject to common carrier regulation, because
the HighwayMaster proprietary hardware and software processing applications act
on information transmitted by subscribers, who then receive information in
return from HighwayMaster regarding the status of their commercial vehicles. The
Company relies on its long-distance provider to comply with any long-distance
regulatory requirements.

         The wireless telecommunications industry currently is experiencing
significant regulatory changes which may require a re-examination of laws and
regulations applicable to the Company's operations. For example, both the
present HighwayMaster service and the future AutoLink service may be considered
to be commercial mobile radio services ("CMRS"). CMRS providers are treated as
common carriers, except that the FCC has decided to forbear from most common
carrier regulation of the CMRS marketplace, including regulation of the rates
and terms of entry for interstate services offered by CMRS providers. In
addition, Congress has preempted state regulation of CMRS entry and rates.
Recent FCC decisions have enhanced the development of CMRS, including requiring
local telephone companies to offer 


                                       29
<PAGE>   35

interconnection and access to their networks to CMRS providers and to establish
reciprocal compensation arrangements with CMRS providers for the transportation
and termination of calls at prices that are cost-based and just and reasonable.
To the extent that services offered by the Company are determined to be
telecommunications services (which would not include enhanced services offered
by the Company), the Company would be required to contribute to the mechanisms
established by the FCC and various states to preserve and advance universal
service. At the federal level, the Company's universal service contribution
would be based on the end-user telecommunications revenues generated by those
services that are determined to be telecommunications services. The Company
cannot predict the impact of any requirement to contribute to state and federal
universal service mechanisms.

         The Company's regulatory status also may change as a result of offering
the AutoLink service, which will be offered indiscriminately to the public at
large, with no individualized or customized contracts, and thus may be
considered a common carrier service. However, the Company believes that it will
nonetheless be regulated as a private carrier if, as currently contemplated, the
AutoLink service does not offer interconnection to the public switched network.
If the Company's interpretation of its regulatory status proves to be incorrect
and it is deemed to be a common carrier, the Company may be required to offer
its services upon reasonable request from any member of the public, it may be
required to offer its services on a basis that is not unreasonably
discriminatory, and, in certain states that regulate common carriers, it must
comply with various regulatory requirements established by state public utility
commissions, or their governing statutes, including procedures related to
customer deposits, the filing of registration or notification letters, and the
filing of tariffs. Changes in regulation of cellular common carriers also may
require equal access by customers to the long-distance provider of their choice.
Although regulations applicable to common carriers would add certain
administrative costs and possible complications to the Company's relationships
with its long-distance provider and cellular carriers, the Company believes that
common carrier status would not require the Company to make substantial changes
to its current services. Finally, certain public utility commissions could take
the position that approval would be needed prior to any transfer of control of
the Company. There can be no assurance that compliance with such regulations
would not have a material adverse effect on the Company's operations.

         Long-distance providers face regulatory provisions similar to cellular
carriers, with greater state involvement in requiring the posting of bonds as
security against customer deposits and in other matters. The Company believes
current long-distance regulations apply to the companies providing long-distance
services directly to Company customers, without long-distance regulatory
involvement by the Company. There can be no assurance, however, that the Company
will not become subject to regulations as a long-distance carrier and that such
regulation would not have a material adverse effect on the Company's business.

         In February 1996, The Telecommunications Act of 1996 (the
"Telecommunications Act") was signed into law. This is the most comprehensive
set of telecommunications laws to be enacted since the original Communications
Act of 1934 was passed. The Telecommunications Act encourages competition in
virtually every arena of communications and eliminates many regulatory barriers
to new competitors by, in some instances, preempting state and local
restrictions. The Telecommunications Act requires the FCC to extensively revise
many of the rules and regulations under which the telecommunications industry
has been operating. To that end, the FCC has completed approximately 80
different proceedings in connection with the Telecommunications Act. At this
time, it is unclear how the Telecommunications Act will affect the activities of
the Company, its strategic business relationships with other communications
companies, or its customers. There can be no assurance that the relaxing of
barriers to competition in the industry will not hinder the Company's growth and
viability in the marketplace.

         The Company currently provides mobile communications services to
Canadian-based operators only if such operators provide a remote call forwarding
line (also known as a foreign exchange line) from their dispatcher PC to the
United States. This limits the Company's ability to provide such services in
Canada, especially to owner-operators and operators of small fleets that cannot
easily afford the expense of a remote call forwarding line. There can be no
assurance that the Company will be able to resolve the issues required to permit
it to expand the scope of its Canadian operations, including any expansion
required to provide the AutoLink service.


                                       30
<PAGE>   36

DEPENDENCE ON KEY PERSONNEL

         The Company is dependent on the efforts of William C. Kennedy, Jr.,
Chairman of the Board, William C. Saunders, President and Chief Executive
Officer, Gordon C. Quick, Chief Operating Officer, and a group of employees with
technical knowledge regarding the Company's systems. The loss of services of one
or more of these individuals could materially and adversely affect the business
of the Company and its future prospects. The Company has employment agreements
with Messrs. Kennedy, Saunders and Quick. Each of Messrs. Kennedy and Saunders
may terminate such agreements upon one-year's written notice. Mr. Quick may
terminate his agreement at any time upon 90-days' written notice. The Company
does not maintain key man life insurance on any of the Company's officers or
employees. The Company's future success will also depend on its ability to
attract and retain additional management and technical personnel required in
connection with the growth and development of its business. See "Management."

EXPANSION RISK

         To the extent that the Company is successful in implementing its
business strategy, the Company may experience periods of rapid expansion in the
future. In order to manage growth effectively in the complex environment in
which it operates, the Company will need to maintain and improve its operating
and financial systems and expand, train and manage its employee base. In
addition, the Company must carefully manage production and inventory levels to
meet product demand and facilitate new product introductions. Inaccuracies in
demand forecasts could result in insufficient or excessive inventories and
disproportionate overhead expenses. The Company must also expand the capacity of
its sales, distribution and installation networks in order to achieve continued
growth in its existing and future markets. In general, the failure to manage
growth effectively could have a material adverse effect on the Company's
business, financial condition and results of operations.

CUSTOMER CONCENTRATION

         Ameritruck, Burlington, Contract Freighters, Inc., Ryder Automotive
Carrier Division and Wal-Mart collectively accounted for approximately 26% of
the Company's installed base of Series 5000 Mobile Units as of June 30, 1997 and
60% of its backlog of Series 5000 Mobile Units on order as of the same date. The
loss of any of these customers, or any event, occurrence or development which
adversely affects the relationship between the Company and any of these
customers, could have a material adverse effect upon the Company's business,
financial condition and results of operations.

PRODUCT LIABILITY

         Testing, manufacturing and use of the Company's products entail the
risk of product liability. Although management believes the Series 5000 Mobile
Unit offers safety advantages over conventional cellular telephones, it is
possible that operation of the product may give rise to product liability
claims. Product liability claims present a risk of protracted litigation,
substantial money damages, attorney's fees, costs and expenses, and diversion of
management attention. In addition, as the Company expands its business to
include the provision of automotive security and similar systems such as those
contemplated by the AutoLink business alliance, the larger number of consumers
utilizing the Company's products may expose the Company to an increased risk of
litigation regarding various safety, performance and other matters. Product
liability claims which exceed policy limits applicable to the Company's
liability insurance or which are excluded from the policy coverage could have a
material adverse effect on the business or financial condition of the Company.

ADVERSE ECONOMIC CONDITIONS

         The purchase of Series 5000 Mobile Units represents discretionary
spending by trucking companies seeking to obtain a competitive advantage in
long-haul trucking market. An economic downturn affecting either the national
economy or the long-haul trucking industry could have an adverse effect on
existing and prospective customers by 


                                       31
<PAGE>   37

reducing the amount of funds available for discretionary spending. In the event
of such a downturn, customers might place fewer orders for Series 5000 Mobile
Units than they otherwise would do or might seek to cancel existing orders
placed with the Company.

CERTAIN TAX CONSIDERATIONS

         The Old Notes were issued with original issue discount ("OID") for U.S.
federal income tax purposes in an amount equal to the excess of the principal
amount due at maturity on the Old Notes over their deemed "issue price" (as
described in "Certain U.S. Federal Tax Consequences -- U.S. Holders -- Original
Issue Discount"). This OID will carry over to, and be treated as OID on, the
Exchange Notes received in exchange for the Old Notes, and each U.S. holder of
an Exchange Note will be required to include in taxable income for any
particular taxable year a portion of such OID in advance of the receipt of the
cash to which such OID is attributable. For additional information regarding the
OID associated with the Notes, as well as certain other federal income tax
considerations relevant to the exchange of Old Notes for Exchange Notes and the
ownership and disposition of Exchange Notes, see "Certain U.S. Federal Tax
Consequences."

LACK OF PUBLIC MARKET

         Prior to the Exchange Offer, there has not been any public market for
the Old Notes. The Old Notes have not been registered under the Securities Act
and will be subject to restrictions on transferability to the extent that they
are not exchanged for Exchange Notes by holders who are entitled to participate
in the Exchange Offer. The holders of Old Notes (other than any such holder that
is an "affiliate" of the Company within the meaning of Rule 405 under the
Securities Act) who are not eligible to participate in the Exchange Offer are
entitled to certain registration rights, and the Company is required to file a
Shelf Registration Statement with respect to such Old Notes. The Exchange Notes
will constitute a new issue of securities with no established trading market.
The Exchange Notes will not be listed on any securities exchange and the Company
will not seek the admission thereof to trading in the National Association of
Securities Dealers Automated Quotation System. The Company has been advised by
the Initial Purchasers that they intend to make a market in the Exchange Notes;
however, the Initial Purchasers are not obligated to do so, and any such market
making activities may be discontinued at any time without notice. In addition,
such market making activity may be subject to the limits imposed by the
Securities Act and the Exchange Act and may be limited during the Exchange Offer
and the pendency of the Shelf Registration Statement. Therefore, there can be no
assurance that an active market for the Exchange Notes will develop or as to
liquidity of a trading market for the Exchange Notes.

         Depending on prevailing interest rates, the market for similar
securities and other factors, including the financial condition of the Company,
the Exchange Notes may trade at a discount from their principal amount.

EXCHANGE OFFER PROCEDURES

         Issuance of the Exchange Notes in exchange for the Old Notes pursuant
to the Exchange Offer will be made only after a timely receipt by the Company of
such Old Notes, a properly completed and duly executed Letter of Transmittal and
all other required documents. Therefore, holders of the Old Notes desiring to
tender such Old 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 the tenders of Old
Notes for exchange. Old Notes that are not tendered or are tendered but not
accepted will, following the consummation of the Exchange Offer, continue to be
subject to the existing restrictions upon transfer thereof and, upon
consummation of the Exchange Offer, registration rights under the Registration
Rights Agreement generally will terminate. In addition, any holder of Old Notes
who tenders in the Exchange Offer for the purpose of participating in a
distribution of the Exchange Notes may be deemed to have received restricted
securities and, if so, will be required to comply with the registration and
prospectus delivery requirements of the Securities Act in connection with any
resale transactions. Each Participating Broker-Dealer that receives Exchange
Notes for its own account in exchange for Old Notes, where such Old Notes were
acquired by such Participating Broker-Dealer as a result of market-making
activities or other trading activities, must acknowledge that 


                                       32
<PAGE>   38

it will deliver a prospectus in connection with any resale of such Exchange
Notes. See "Plan of Distribution." To the extent that Old Notes are tendered and
accepted in the Exchange Offer, the trading market for untendered and tendered
but unaccepted Old Notes could be adversely affected. See "The Exchange Offer."


                                       33
<PAGE>   39

                                 USE OF PROCEEDS

         The Company will not receive any cash proceeds from the issuance of the
Exchange Notes offered hereby. The Exchange Offer is intended to satisfy certain
of the Company's obligations under the Registration Rights Agreement.

         The net proceeds from the Units Offering were approximately $119.9
million, after deducting the discount to the Initial Purchasers and estimated
offering expenses. The Company used approximately $46.6 million of such proceeds
to fund the purchase of the Pledged Securities. All remaining proceeds have been
contributed by the Company to HMC and will be used for general corporate
purposes, including, (i) to fund working capital requirements and operating
losses expected to be incurred in connection with the continued growth and
development of the Company's existing long-haul trucking application, (ii) to
fund expenditures relating to the development of new mobile communications
applications to be provided through the Company's network, including the
proposed Series 3000 Mobile Unit and AutoLink service, and (iii) to fund capital
expenditures required to expand the capacity of the NSC to enable it to serve a
larger number of long-haul trucking customers and to construct the AutoLink
Complex. Pending the use of the net proceeds for the purposes described above,
the Company has invested such proceeds in short-term, interest-bearing
investments.


                                       34
<PAGE>   40

                                 CAPITALIZATION

         The following table sets forth the cash and cash equivalents, Pledged
Securities and capitalization of the Company at June 30, 1997 on a historical
basis and as adjusted to give effect to the Units Offering and the application
of the net proceeds therefrom. This table should be read in conjunction with
"Use of Proceeds," "Selected Financial Data," "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and the consolidated
financial statements, including the notes thereto, included elsewhere in this
Offering Memorandum.


<TABLE>
<CAPTION>
                                                                    JUNE 30, 1997
                                                               -----------------------
                                                                 ACTUAL    AS ADJUSTED
                                                               ---------   -----------
                                                               (DOLLARS IN THOUSANDS)
<S>                                                            <C>          <C>      
Cash and cash equivalents ..................................   $   5,987    $  78,924
Pledged Securities .........................................          --       47,000(1)
                                                               ---------    ---------
     Total .................................................   $   5,987    $ 125,924
                                                               =========    =========
Long-term debt:
  Notes ....................................................   $      --    $ 120,814(2)
  Other debt ...............................................          --           --
Stockholders' equity:
  Series D Participating Convertible Preferred Stock, par
     value $.01; 1,000 shares authorized and issued ........          --           --
  Common Stock, par value $.01; 50,000,000 shares
     authorized; 25,176,983 shares issued (including
     treasury stock); ......................................         252          252
  Additional paid-in capital ...............................     145,030      149,216(2)
  Accumulated deficit ......................................    (123,886)    (123,886)
  Treasury stock ...........................................        (547)        (547)
                                                               ---------    ---------
     Total stockholders' equity ............................   $  20,849    $  25,035
                                                               ---------    ---------
          Total capitalization .............................   $  20,849    $ 145,849
                                                               =========    =========
</TABLE>

- ----------

(1)  The Company used approximately $46.6 million of the net proceeds of the
     Unit Offering to purchase Government Securities representing funds
     sufficient to provide for payment in full when due of the first six
     scheduled interest payments on the Notes.

(2)  The aggregate principal amount of the Notes is $125.0 million. The
     estimated value of the Warrants, $4,186,000, is reflected both as debt
     discount and an element of additional paid-in capital.


                                       35
<PAGE>   41

                             SELECTED FINANCIAL DATA

         The selected consolidated financial data set forth below for the period
from inception (April 24, 1992) to December 31, 1992, and for each of the years
ended December 31, 1993, 1994, 1995 and 1996 have been derived from audited
consolidated financial statements of the Company and its predecessor. The
selected consolidated financial data set forth below for the six months ended
June 30, 1996 and 1997 have been derived from unaudited financial statements of
the Company, which in the opinion of management of the Company contain all
adjustments (consisting solely of normal recurring adjustments) necessary for a
fair presentation thereof. The results of operations for the six months ended
June 30, 1997 are not necessarily indicative of the results to be expected for
the full year. The data set forth in this table should be read in conjunction
with the "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and the consolidated financial statements, including the
notes thereto, included elsewhere in this Prospectus.

<TABLE>
<CAPTION>
                                             APRIL 24, 1992                                                    SIX MONTHS ENDED
                                             (INCEPTION) TO             YEAR ENDED DECEMBER 31,                    JUNE 30,
                                               DECEMBER 31,  --------------------------------------------    --------------------
                                                   1992        1993        1994        1995        1996        1996        1997
                                             --------------  --------    --------    --------    --------    --------    --------
                                                         (DOLLARS IN THOUSANDS, EXCEPT FOR PER SHARE AND OPERATING DATA)
<S>                                          <C>             <C>         <C>         <C>         <C>         <C>         <C>     
CONSOLIDATED STATEMENT OF OPERATIONS
  DATA:
Revenues:
  Product ....................................   $     --    $  1,665    $ 11,075    $ 16,946    $ 14,645    $  6,423    $ 14,249
  Service ....................................         --          --       2,436       9,908      16,056       7,449      11,006
                                                 --------    --------    --------    --------    --------    --------    --------
        Total revenues .......................         --       1,665      13,511      26,854      30,701      13,872      25,255
                                                 --------    --------    --------    --------    --------    --------    --------
Cost of revenues:
  Product ....................................         --       1,792      11,867      17,730      15,099       6,403      12,148
  Service ....................................         --          --       2,099       9,172      11,489       5,415       8,671
  Writedown of inventory .....................         --          --       1,658          --       1,943          --          --
                                                 --------    --------    --------    --------    --------    --------    --------
        Total cost of revenues ...............         --       1,792      15,624      26,902      28,531      11,818      20,819
                                                 --------    --------    --------    --------    --------    --------    --------
    Gross profit (loss) ......................         --        (127)     (2,113)        (48)      2,170       2,054       4,436
General and administrative expenses ..........      1,554       2,981       6,577       7,299       9,479       4,299       7,096
Sales and marketing expenses .................        838       3,222       3,890       6,273       9,139       4,710       4,055
Engineering expenses .........................        520       1,274       1,900       2,868       4,094       1,736       2,212
Customer service expenses ....................         --         915       4,587       5,727       8,089       3,930       5,538
                                                 --------    --------    --------    --------    --------    --------    --------
    Operating loss ...........................     (2,912)     (8,519)    (19,067)    (22,215)    (28,631)    (12,621)    (14,465)
Interest income ..............................         --          --         279       1,041         809         444         448
Interest expense to related parties ..........       (235)       (547)     (5,999)     (5,106)     (1,691)     (1,088)         --
Recapitalization costs .......................         --          --        (733)         --          --          --          --
Other income (expense) .......................         10          (9)       (361)       (117)       (230)         (3)         --
                                                 --------    --------    --------    --------    --------    --------    --------
Loss before income taxes and extraordinary
  item .......................................     (3,137)     (9,075)    (25,881)    (26,397)    (29,743)    (13,268)    (14,017)
Income tax provision .........................         --          --          --          --          --          --          --
                                                 --------    --------    --------    --------    --------    --------    --------
Loss before extraordinary item ...............     (3,137)     (9,075)    (25,881)    (26,397)    (29,743)    (13,268)    (14,017)
Extraordinary item-- loss on                  
  extinguishment of debt .....................         --          --          --      (6,980)       (317)         --          --
                                                 --------    --------    --------    --------    --------    --------    --------
  Net loss ...................................   $ (3,137)   $ (9,075)   $(25,881)   $(33,377)   $(30,060)   $(13,268)   $(14,017)
                                                 ========    ========    ========    ========    ========    ========    ========
Per share data(1):
  Loss before extraordinary item..............                           $  (1.50)   $  (1.39)   $  (1.39)   $  (0.66)   $  (0.56)
  Extraordinary item..........................                                 --       (0.34)      (0.01)         --          --
                                                                         --------    --------    --------    --------    --------
  Net loss per share..........................                           $  (1.50)   $  (1.73)   $  (1.40)   $  (0.66)   $  (0.56)
                                                                         ========    ========    ========    ========    ========
Weighted average number of shares
  outstanding.................................                             18,259      20,407      22,763      22,029      24,843
                                                                         ========    ========    ========    ========    ========
OTHER FINANCIAL AND OPERATING DATA:
Installed base of Series 5000 Mobile
  Units(2)....................................         --          --       6,131      14,751      20,354      17,439      25,233
Average monthly Series 5000 Mobile Unit       
  usage(3)....................................         --          --         135         136         130         130         126
Average monthly Series 5000 Mobile Unit       
  service revenue(4)..........................         --          --    $  66.22    $  79.08    $  76.23    $  77.14    $  80.48
Capital expenditures..........................   $    162    $    768    $  1,613    $  4,076    $  5,139    $  2,187    $  3,253
Ratio of earnings to fixed charges(5).........         --          --          --          --          --          --          --
</TABLE>


                                       36
<PAGE>   42

<TABLE>
<CAPTION>
                                                              AS OF DECEMBER 31,                      AS OF
                                           -------------------------------------------------------   JUNE 30,
                                             1992        1993        1994        1995       1996       1997
                                           --------    --------    --------    --------   --------   --------
                                                                     (DOLLARS IN THOUSANDS)
<S>                                        <C>         <C>         <C>         <C>        <C>        <C>     
CONSOLIDATED BALANCE DATA SHEET:
Working capital ........................   $ (4,614)   $ (4,011)   $  4,223    $ 25,772   $ 24,605   $  9,375
Property and equipment-- net ...........        166         593       1,386       3,927      7,756      8,080
Total assets ...........................      1,575       5,928      16,430      42,369     42,929     32,986
Notes ..................................      6,045       7,225      36,247      11,488         --         --
Redeemable preferred stock .............         --          --       6,149       8,126         --         --
Common stock ...........................         --          --         178         223        251        252
Additional paid-in-capital .............         --          --       7,377      90,560    144,829    145,030
Total stockholders' equity (deficit) ...     (5,241)     (3,816)    (34,773)     13,101     34,664     20,849
</TABLE>

- ----------

(1)  Per share data for 1994 reflects certain unaudited pro forma adjustments.
     See Notes 1 and 4, "Recapitalization" and "Earnings per Share",
     respectively, of the Notes to Consolidated Financial Statements as of
     December 31, 1995 and 1996 and for the years ended December 31, 1994, 1995
     and 1996.

(2)  Represents the number of Series 5000 Mobile Units in service at the end of
     the applicable period.

(3)  Represents the average number of minutes of service for a Series 5000
     Mobile Unit during the applicable period.

(4)  Represents the average service revenue per Series 5000 Mobile Unit
     recognized by the Company during the applicable period. Service revenues
     per Series 5000 Mobile Unit vary significantly depending upon whether the
     unit is serviced through the AT&T Complex or the NSC. In general, service
     revenues and related operating expenses are greater for units serviced
     through the NSC than for those serviced through the AT&T Complex. For new
     customers commencing service since July 1, 1996, all transmissions are
     routed through the NSC. See "Management's Discussion and Analysis of
     Financial Condition and Results of Operations-- General."

(5)  For purposes of calculating the ratio of earnings to fixed charges,
     earnings are defined as loss before income taxes and extraordinary item
     plus fixed charges. Fixed charges consist of interest expense, amortization
     of debt issuance costs, accretion of discount on preferred stock and a
     reasonable approximation of the interest factor included in rental payments
     on operating leases. Earnings were inadequate to cover fixed charges for
     the period from inception to December 31, 1992 and the years ended December
     31, 1993, 1994, 1995 and 1996 by $3,137,000, $9,075,000, $25,881,000,
     $26,397,000 and $29,743,000 respectively, and for the six months ended June
     30, 1996 and 1997 by $13,268,000 and $14,017,000, respectively.


                                       37
<PAGE>   43

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

GENERAL

         The Company develops and implements mobile communications solutions,
including integrated voice, data and position location services, to meet the
needs of its customers. The initial application for the Company's wireless
enhanced services has been developed for, and is currently being marketed and
sold to, companies which operate in the long-haul trucking market. The Company
provides long-haul trucking companies with a comprehensive package of mobile
communications and management control services at low, fixed per minute rates,
thereby enabling its trucking customers to effectively monitor the operations
and improve the performance of their fleets. The Company is currently developing
additional applications for its network to expand the range of trucking
companies that utilize its services and to address the needs of the automotive
and other markets. Among other things, HighwayMaster recently entered into a
strategic business alliance with Prince, a subsidiary of Johnson Controls and a
leading supplier of automotive interior systems and components, to develop and
provide an automobile safety and security service, the AutoLink(R) service, to
motorists in the United States and Canada. The AutoLink service is expected to
be available on a commercial basis beginning in late 1998.

         The Company commenced operations in April 1992 and has a limited
operating history. The Company began offering its long-haul trucking application
on a commercial basis in September 1993. In order to achieve a profitable level
of operations, the Company must significantly increase its installed product
base and generate substantially greater service revenues. The likelihood of the
long-term success of the Company must be considered in light of the expenses,
difficulties and delays frequently encountered in connection with the early
stages of the development and marketing of telecommunications products and
services, as well as the competitive environment in which the Company operates.
The Company expects to continue to incur losses and negative cash flow in the
future, and there can be no assurance that the Company's future operations will
generate operating or net income or positive cash flow in any future period. See
"Risk Factors -- Limited Operating History; Significant Losses."

         At the present time, the Company derives all of its revenues from the
long-haul trucking market. Such revenues consist of payments generated by the
sales and installation of Series 5000 Mobile Units and charges for its services.
The Company currently offers its Series 5000 Mobile Units to customers at a
retail price of approximately $1,995 per Series 5000 Mobile Unit, with tiered
discounts for larger volume purchases. Customers operating Series 5000 Mobile
Units installed in their trucks are charged (i) a flat fee of $0.53 per minute
for all voice calls for communications within the United States and $0.64 per
minute for cross-border communications with Series 5000 Mobile Units in Canada
and (ii) a flat fee of $0.48 per minute for all data transmissions within the
United States and $0.59 per minute for cross-border data transmissions with
Series 5000 Mobile Units in Canada. Such flat per minute fees include all
cellular air time rates and long-distance charges. As described below, in the
case of customers of the Company served through the AT&T Complex, the Company
receives and recognizes as revenue only a portion of the foregoing service
charges. In addition, callers are charged a fee for each call billed to a
separate account, such as a credit card, calling card or HighwayMaster account.
The Company also assesses a fixed monthly service fee of $41 for each Series
5000 Mobile Unit installed.

         From 1993 to 1996, the Company and AT&T were parties to the AT&T
Contract under which AT&T provided enhanced call processing, data management
services and long-distance network transport services through the AT&T Complex.
The AT&T Contract was terminated by AT&T effective June 29, 1996. However, AT&T
continues to provide services for certain Company customers without a formal
contract with the Company pursuant to AT&T's obligations with respect to its
existing service agreements with such customers. See "Risk Factors -- Status of
AT&T Contract; Network Services Center" and " -- AT&T Litigation."

         In the third quarter of 1996, the Company placed into service the NSC.
The NSC provides enhanced call processing services that were previously provided
on an exclusive basis by AT&T. All new customers of the Company 


                                       38
<PAGE>   44

are provided services through the NSC. The Company performs customer billing,
credit and collection activities with respect to customers served through the
NSC. Certain existing customers who previously were served through the AT&T
Complex have recently elected to begin receiving service through the NSC.
Although no assurance can be given in this regard, the Company expects that
additional customers may elect to switch to the NSC during the remainder of
1997.

         The amount of service revenues and related expenses recognized by the
Company varies significantly based upon whether a particular customer receives
service through the AT&T Complex or the NSC. In the case of customers served
through the AT&T Complex, service charges are collected by AT&T. The Company
receives payment from AT&T for the portion of these service charges recognized
by the Company as revenue and the remainder is retained by AT&T as compensation
for its cost of providing services. In the case of customers served by the NSC,
the entire amount of the service charge to customers is recognized by the
Company as revenue and additional operating and service expenses are borne by
the Company. The operating expenses associated with the NSC are reflected in the
Company's financial statements as general and administrative expenses (primarily
depreciation, allowance for bad debts and billing expenses) and customer service
expenses (other third party and internal operating expenses). Because of the
difference in economic arrangements described above, to the extent a greater
proportion of the Company's customers are served through the NSC, service
margins are expected to improve, reflecting the increased revenues recognized by
the Company which are expected to be partially offset by additional operating
and service expenses. Because the operating expenses associated with the NSC
include certain fixed costs, such operating expenses are not expected to
increase proportionately with the number of customers added.

         The Company periodically analyzes the charges billed to the Company by
GTE Wireless on behalf of cellular carriers in order to obtain the appropriate
amount of credit for any invalid air time usage charges billed to the Company.
Furthermore, the Company incurs certain costs for valid air time usage that are
not billable to customers under current billing practices. There can be no
assurance that the Company will not incur significant costs in the future in
connection with billing discrepancies or the reconciliation process or that the
costs will not have an adverse impact on the Company's ability to achieve and
maintain satisfactory profit margins.

         The Company generally recognizes revenue from the sale of Series 5000
Mobile Units at the time the Series 5000 Mobile Units are shipped to customers.
However, in some cases, the Company has installed Series 5000 Mobile Units in
customers' trucks on a trial basis, permitting customers to return such Series
5000 Mobile Units with limited or no penalty. In such cases, the Company does
not recognize revenue from the sale of the Series 5000 Mobile Units until the
trial period has expired.

         The principal components of cost of product revenues are the cost of
Series 5000 Mobile Units, warranty and obsolescence provisions and cost of
installation of Series 5000 Mobile Units. The principal components of cost of
service revenues are charges for the cost of cellular air time used by the
Series 5000 Mobile Unit (which charges are paid by GTE Wireless to cellular
carriers and reimbursed by the Company), charges by GTE-TSI and EDS for the cost
of validation and call delivery information from the Series 5000 Mobile Unit and
long-distance charges.

         As of June 30, 1997, the Company had installed 25,233 Series 5000
Mobile Units and had orders to install an additional 9,059 Series 5000 Mobile
Units. The Company's order backlog is based on signed contracts, which generally
do not specify delivery dates. Accordingly, in some cases the timing of
installation is uncertain, and the Company expects that not all of the Series
5000 Mobile Units on order at June 30, 1997 will be shipped and installed within
the next twelve months. See "Risk Factors -- Backlog; No Firm Delivery Dates"
and "Business -- Products and Services -- Series 5000 -- Current Installed
Base."

         The Company leases its products to certain customers under contracts
that are accounted for as sales-type leases. As of December 31, 1996, the
Company's balance sheet reflected a total receivable balance of approximately
$1,468,000 related to such leases. In March 1997, a customer who represented
$1,239,000 of the total receivable balance notified the Company that it intended
to terminate its long-term lease commitment. Although the lease agreement
contains termination penalties, the amount due from this customer is in dispute.
Accordingly, the Company recorded 


                                       39
<PAGE>   45

a $1,000,000 charge to reduce the carrying value of the receivable at March 31,
1997. The Company is currently engaged in litigation with this customer
regarding the amount of the termination payments due to the Company, as well as
claims asserted by the customer with respect to certain purported breaches of
contract, breaches of express and implied warranties and other matters.

Six Months Ended June 30, 1997 Compared to Six Months Ended June 30, 1996

         Revenues for the six months ended June 30, 1997 were $25.3 million
compared to $13.9 million for the six months ended June 30, 1996. Product
revenues for the six months ended June 30, 1997 were $14.2 million compared to
$6.4 million for the six months ended June 30, 1996. Service revenues for the
six months ended June 30, 1997 were $11.0 million compared to $7.4 million for
the six months ended June 30, 1996. The increase in product revenues from the
1996 period to the 1997 period is primarily attributable to a 151% increase in
Series 5000 Mobile Units sold. Series 5000 Mobile Units sold in the 1996 period
were abnormally low due to, among other things, inefficiencies in connection
with a restructuring of the Company's sales force, and adverse economic
conditions affecting the trucking industry. The increase in service revenues
from the 1996 period to the 1997 period is primarily attributable to the
increase in the number of Series 5000 Mobile Units in service.

         Cost of revenues for the six months ended June 30, 1997 was $20.8
million compared to $11.8 million for the six months ended June 30, 1996. This
increase is primarily as a result of the increase in the number of Series 5000
Mobile Units sold and in service. Gross profit margin was 17.6% for the six
months ended June 30, 1997 compared to 14.8% for the six months ended June 30,
1996.

         Product gross profit margin was 14.7% for the six months ended June 30,
1997 compared to 0.3% for the six months ended June 30, 1996. The improvement in
product gross profit margin from the 1996 period to the 1997 period is primarily
due to the leverage obtained on the fixed portion of the Company's installation
costs as a result of the significant increase from the 1996 period to the 1997
period in shipments and installations and a lower average cost per Series 5000
Mobile Unit sold. The lower average cost per Series 5000 Mobile Unit is
primarily attributable to manufacturing and procurement economies.

         Service gross profit margin was 21.2% for the six months ended June 30,
1997 compared to 27.3% for the six months ended June 30, 1996. The Company
incurs certain costs for air time usage that are not billable to customers under
current billing practices. During the six months ended June 30, 1997, the
Company recorded an adjustment to increase cellular airtime cost, a component of
cost of service revenue, based on new billing data received in July 1997. This
new billing data indicates that the portion of airtime usage not billable to
customers is higher than previously believed by the Company and used as the
basis for recording accounting estimates. This changed relationship between cost
of cellular airtime paid for by the Company and airtime billable to customers is
the reason for the decrease in service gross profit margin. The Company is
currently in the process of evaluating the factors underlying the increase in
cellular airtime costs and will attempt to identify technical adjustments and
modifications that may enable it to improve its service gross profit margin. At
the present time, the Company's evaluation of these factors is in its
preliminary stages and there can be no assurance that the Company's results of
operations in future periods will not be impacted by the same or similar
factors.

         General and administrative expenses for the six months ended June 30,
1997 were $7.1 million compared to $4.3 million for the six months ended June
30, 1996. The most significant increases in general and administrative expenses
from the 1996 period to the 1997 period were bad debt expense, NSC depreciation
expense, and professional fees. The Company records an allowance for doubtful
accounts based on a percentage of sales. Accordingly, bad debt expense increased
(i) because of the significant increase in revenues from the 1996 period to the
1997 period and (ii) because of a $1 million charge recorded to provide for loss
on the sales-type lease receivable due from a customer as a result of the
customer's early termination of the lease.


                                       40
<PAGE>   46

         Sales and marketing expenses for the six months ended June 30, 1997
were $4.1 million compared to $4.7 million for the six months ended June 30,
1996. The decrease from the 1996 period to the 1997 period is primarily related
to reduction in the number of sales and marketing employees. The 1996 period was
characterized by expansion of the sales force. Sales and marketing expenses for
the 1997 period reflects the results of a realignment of the sales force to
coincide with the Company's target markets.

         Engineering expenses for the six months ended June 30, 1997 were $2.2
million compared to $1.7 million for the six months ended June 30, 1996. This
increase is primarily attributable to increases in payroll related costs as a
result of headcount additions.

         Customer service expenses for the six months ended June 30, 1997 were
$5.5 million compared to $3.9 million for the six months ended June 30, 1996.
This increase is primarily attributable to (i) NSC operating expenses and (ii)
costs incurred as a result of the increased number of Series 5000 Mobile Units
shipped and in service.

         The reduction in interest expense to related parties from the 1996
period to the 1997 period is due to the retirement of all outstanding
indebtedness to related parties.

Year Ended December 31, 1996 Compared to Year Ended December 31, 1995

         Revenues for 1996 were $30.7 million compared to $26.9 million for
1995. Product revenues for 1996 were $14.6 million compared to $17.0 million for
1995. The principal reason for the decrease in product revenues from 1995 to
1996 is a 24.5% decrease in the number of Series 5000 Mobile Units sold. The
decrease in Series 5000 Mobile Units sold was due to, among other things, (i)
prospective customers postponing their decision to purchase until they were
comfortable that the Company could deliver service through the NSC, (ii)
prospective customers' concerns about the Company's financial condition and
(iii) adverse economic conditions affecting the trucking industry. Service
revenues for 1996 were $16.1 million compared to $9.9 million for 1995. The
increase in service revenues in 1996 is primarily attributable to the increase
in the number of Series 5000 Mobile Units in service.

         Cost of revenues for 1996 was $28.5 million compared to $26.9 million
for 1995. This relationship reflects the decrease in the number of Series 5000
Mobile Units sold in 1996 compared to 1995 offset by increased cost of service
revenues in 1996 as a result of the increase in the number of Series 5000 Mobile
Units in service. Cost of revenues for 1996 was 92.9% (86.6% exclusive of the
inventory write-down) of revenues compared to 100.2% of revenues for 1995. Cost
of revenues for 1996 included a $1.9 million inventory write-down to adjust the
carrying value of used earlier generation mobile communication unit component
parts inventory to its estimated net realizable value. Cost of product revenues
for 1996 was 116.4% (103.1% exclusive of the inventory write down) of product
revenues compared to 104.6% of revenues for 1995. Excluding the effect of the
inventory write down, product margin improved as a result of higher average
selling prices and lower average cost per Series 5000 Mobile Unit in 1996 as
compared to 1995. However, this margin improvement was offset by costs incurred
on the earlier generation mobile communication units in order to make them
compatible with the NSC and costs of upgrading earlier generation mobile
communication units. Cost of service revenues for 1996 was 71.6% of service
revenues compared to 92.6% of service revenues in the 1995 period. The
improvement from 1995 to 1996 is primarily due to (i) the effect of lower costs
as a result of renegotiated rates with the Company's service providers that were
in effect during 1996 and (ii) improvement in the Company's ability to monitor
and control charges for air time usage.

         General and administrative expenses for 1996 were $9.5 million compared
to $7.3 million for 1995. The increase from 1995 to 1996 is primarily
attributable to rent expense, depreciation expense, and professional fees. Rent
expense increased as a result of (i) additional office space and equipment under
lease due to the growth in the number of employees from 241 at the end of 1995
to 295 at the end of 1996 and (ii) increased cost per square foot in the lease
agreement for the Company's office space. Depreciation expense increased as a
result of additions to machinery and equipment, computers and office equipment,
and the NSC which was placed in service during the third quarter of 1996. The
increase in professional fees was primarily due to legal fees in connection with
the litigation with AT&T and a class 


                                       41
<PAGE>   47

action shareholder lawsuit arising in connection with the Company's initial
public offering, which was dismissed in November 1996.

         Sales and marketing expenses for 1996 were $9.1 million compared to
$6.2 million for 1995. The increase from 1995 to 1996 is primarily related to
growth in the number of employees.

         Engineering expenses for 1996 were $4.1 million compared to $2.9
million for 1995. The increase is primarily attributable to increases in payroll
related costs, and operating expenses for the NSC.

         Customer service expenses for 1996 were $8.1 million compared to $5.7
million for 1995. The increase from 1995 to 1996 is primarily attributable to
(i) payroll related costs as a result of growth in the number of employees, (ii)
customer support costs in response to the increased number of Series 5000 Mobile
Units in service, and (iii) concessions granted on amounts owed by a major
customer that was downsizing its fleet.

         Interest income was $0.8 million in 1996 compared to $1.0 million in
1995. The decrease from 1995 to 1996 reflects the lower average cash balances
available for temporary investments.

         Interest expense to related parties was $1.7 million in 1996 compared
to $5.1 million in 1995. The decrease from 1995 to 1996 reflects the lower
average outstanding indebtedness.

         The 1996 and 1995 extraordinary item, loss on extinguishment of debt,
represents the write-off of the unamortized balances of debt discount and debt
issue costs associated with the early retirement of notes payable to related
parties. See notes 3 and 8 to the Consolidated Financial Statements.

Year Ended December 31, 1995 Compared to Year Ended December 31, 1994

         Revenues for 1995 were $26.9 million compared to $13.5 million for
1994. Product revenues for 1995 were $17.0 million compared to $11.1 million for
1994. Service revenues for 1995 were $9.9 million compared to $2.4 million for
1994. The increase in product revenues and service revenues in the 1995 period
is primarily attributable to the increase in the number of Series 5000 Mobile
Units sold and in service, respectively.

         Cost of revenues for 1995 was $26.9 million compared to $15.6 million
for 1994. This increase is consistent with the number of Series 5000 Mobile
Units sold and in service. Cost of revenues for 1995 was 100.2% of revenues
compared to 115.6% (103.4% exclusive of the inventory write-down) of revenues
for 1994. Cost of revenues for 1994 included a $1.7 million inventory write-down
for LORAN-C radio receivers reflecting the Company's decision to change to the
use of GPS satellite receivers in its Series 5000 Mobile Units. Cost of product
revenues for 1995 was 104.6% of product revenues compared to 122.1% (107.2%
exclusive of the inventory write down) of revenues for 1994. Cost of revenues
from products exceeded revenues from products during both years for several
reasons, including higher costs associated with manufacturing small quantities
and being unable to take advantage of economies of scale, initial implementation
of a product installation infrastructure with excess capacity to support
anticipated increases in sales, and equipment price discounts to certain early
customers. Although revenues from services exceeded cost of revenues from
services during both the 1995 and 1994 periods, results for both periods have
been affected by (i) technical difficulties with the AT&T Complex and (ii)
differences between the billing procedures of cellular carriers and the Company,
which resulted in the Company paying cellular carriers for more minutes of
cellular air time than were billed to the Company's customers.

         General and administrative expenses for 1995 were $7.3 million compared
to $6.6 million for 1994. During 1995, the Company's general and administrative
functions were increased to meet the growth in revenues as well as for the
additional administrative requirements of a public company. Accordingly,
virtually all categories of expenses increased primarily as a result of the
growth in the number of employees from 188 at the end of 1994 to 241 at the end
of 1995. The most significant increases, aggregating approximately $2.0 million,
were payroll related costs, occupancy 


                                       42
<PAGE>   48

costs and insurance. These increases were partially offset by decreases, in the
aggregate amount of $1.4 million, as a result of reductions from the 1994
amounts for amortization expense related to the deferred debt issue costs (see
Notes 3 and 8 of the Notes to the Consolidated Financial Statements), bad debt
expense (see Note 10 of the Notes to the Consolidated Financial Statements), and
professional fees.

         Sales and marketing expenses for 1995 were $6.3 million compared to
$3.9 million for 1994. The increase from 1994 to 1995 period is related to
increases in advertising and promotion of the Series 5000 Mobile Units, the
creation of a distribution network for sales of Series 5000 Mobile Units and
growth in the number of employees.

         Engineering expenses for 1995 were $2.9 million compared to $1.9
million for 1994. This increase is primarily attributable to payroll related
costs as a result of both growth in the number of employees and outside
contractors from 1994 to 1995 to enable the Company to design and develop the
second generation of the HighwayMaster Series 5000 Mobile Unit while maintaining
and enhancing its system software.

         Customer service expenses for 1995 were $5.7 million compared to $4.6
million for 1994. This increase is primarily attributable to (i) payroll related
costs as a result of both growth in the number of employees and outside
contractors and (ii) customer support costs in response to the increased number
of Series 5000 Mobile Units sold and in service.

         The changes in interest income and interest expense to related parties
between 1995 and 1994 reflects the income from temporary investments made with a
portion of the proceeds from the initial public offering and lower average
outstanding indebtedness in the 1995 period as a result of the debt repayments
made with a portion of the proceeds from the initial public offering.

         Recapitalization costs in the amount of $0.7 million for the 1994
period were expended in connection with the Recapitalization.

LIQUIDITY AND CAPITAL RESOURCES

         As more fully described elsewhere herein, on September 27, 1996, the
Company (i) issued 1,000 shares of Series D Preferred Stock to SBC in exchange
for a cash payment of $20.0 million and issued Warrants to purchase 5,000,000
shares of Common Stock to SBC, (ii) issued 800,000 shares of Common Stock to
certain existing stockholders in exchange for a cash payment of $10.0 million,
and (iii) issued an aggregate of 1,882,018 shares of Common Stock to related
parties in exchange for the cancellation of certain promissory notes payable by
the Company in the aggregate principal amount of $12,662,000 and cancellation of
all outstanding shares of Series B Preferred Stock of the Company. The effect of
these transactions was to increase cash by approximately $29.7 million (net of
offering costs), to eliminate all outstanding indebtedness of the Company and to
increase stockholders' equity by approximately $52.0 million. See "Certain
Relationships and Related Party Transactions" and notes 8 and 10 of the
consolidated financial statements.

         The Company's business historically has not required substantial
capital expenditures. However, during 1996 the Company completed and placed into
service the new NSC at a cost of $4.8 million. In addition, in order to provide
the AutoLink service, the Company will need to construct a new switching complex
as contemplated by its joint development contract with Prince. Construction of
the AutoLink Complex is scheduled to take place in 1998 at a projected cost of
approximately $4.0 million. The Company will also need to expand the capacity of
the NSC during the next twelve months to meet the needs of the larger number of
customers expected to begin receiving services through such facility. The
projected cost of expanding the capacity of the NSC is estimated at $1.5
million.

         The Company is currently negotiating with Motorola to supply a hardware
component that will provide a common platform for both the AutoLink product and
more advanced versions of its Series 3000 Mobile Units. If the Company enters
into such an agreement with Motorola, it could involve an obligation by the
Company to purchase up 


                                       43
<PAGE>   49

to 100,000 units. Accordingly, such an agreement with Motorola would involve a
substantial capital commitment on the part of the Company.

         Net cash used in operating activities for the year ended December 31,
1996 was $29.8 million due primarily to a net loss of $30.1 million. Net cash
used in operating activities during the six months ended June 30, 1997 was $10.7
million due primarily to a net loss from operations of $14.0 million.

         The net proceeds from the Units Offering were approximately $119.9
million, after deducting the discount to the Initial Purchasers and estimated
offering expenses. The Company used approximately $46.6 million of such proceeds
to fund the purchase of the Pledged Securities. All remaining proceeds have been
contributed to HMC and will be used for general corporate purposes, including
(i) to fund working capital requirements and operating losses expected to be
incurred in connection with the continued growth and development of the
Company's long-haul trucking application, (ii) to fund expenditures relating to
the development of new mobile communications services to be provided through the
Company's network, including the proposed Series 3000 Mobile Unit and AutoLink
service, and (iii) to fund capital expenditures required to expand the capacity
of the NSC to enable it to serve a larger number of long-haul trucking customers
and to construct the AutoLink Complex. Pending the use of the net proceeds for
the purposes described above, the Company has invested such proceeds in
short-term, interest-bearing investments.

         At June 30, 1997, the Company had cash on hand of $6.0 million and 
working capital of $9.4 million. Based on the Company's projected operating
results, the Company believes that the net proceeds from the Units Offering,
together with the Company's existing capital resources, will be sufficient to
fund its currently anticipated operating needs and capital expenditure
requirements through at least December 31, 1998.

INFLATION

         The Company believes that to date inflation has not had a material
effect on its results of operations. Although inflation may in the future affect
the cost of products sold by the Company, the Company expects that economies of
scale and engineering improvements are likely to offset any foreseeable cost
increases.


                                       44
<PAGE>   50

                                    BUSINESS

THE COMPANY

         The Company develops and implements mobile communications solutions,
including integrated voice, data and position location services, to meet the
needs of its customers. The initial application for the Company's wireless
enhanced services network has been developed for, and is currently being
marketed and sold to, companies which operate in the long-haul trucking market.
The Company provides long-haul trucking customers with a comprehensive package
of mobile communications and management control services at low, fixed per
minute rates, thereby enabling its trucking customers to effectively monitor the
operations and improve the performance of their fleets. As of June 30, 1997, the
Company had in service an installed base of 25,233 Series 5000 Mobile Units in
service in the long-haul trucking market and had orders to install an additional
9,059 Series 5000 Mobile Units.

         The Company is currently developing new applications for its wireless
enhanced services network to expand the range of trucking companies that utilize
its services and address the needs of the automotive and other markets. The
Company plans to introduce its Series 3000 Mobile Unit, which will be less
expensive and will offer more limited functionality than its current long-haul
trucking product. The Company intends to market the Series 3000 Mobile Units
primarily to smaller trucking fleets and owner-operators that can benefit from
the Company's enhanced wireless services, including primarily its nationwide
voice communication capabilities, and for whom protection from fraud, effective
call delivery and low airtime charges are critical requirements. The Company
expects that preliminary versions of the Series 3000 Mobile Unit will be
introduced in early 1998, which the Company believes will be supplanted by a
more advanced version of this product by the end of 1998. In addition, in
January 1997, the Company entered into a strategic business alliance with
Prince, a subsidiary of Johnson Controls and a leading supplier of automotive
interior systems and components, pursuant to which the parties are developing
and marketing and will provide a wireless automobile safety and security
service, the AutoLink(R) service, to be offered to motorists in the United
States and Canada. The AutoLink service is expected to be offered on a
commercial basis beginning in late 1998. The Company is currently negotiating
with Motorola to supply a hardware component that will provide a common platform
for the AutoLink product, the Series 5000 Mobile Units and more advanced
versions of its Series 3000 Mobile Units, but no assurance can be given that
such an agreement will be reached or as to the terms thereof.

         The Company provides its mobile communications services through its
wireless enhanced services network, which utilizes patented technology developed
by the Company to integrate various transmission, long-distance, switching,
tracking and other services provided through contracts with certain
telecommunications companies and more than 70 cellular carriers. Through its
agreements with cellular carriers, the Company is able to take advantage of the
more than $32 billion which cellular carriers have invested to establish and
expand cellular coverage in the United States. The Company's network covers 99%
of the available cellular service areas in the United States and 100% of the
available A-side coverage in Canada. Call processing and related functions for
the Company's network are provided through the AT&T Complex and the NSC. The
Company holds ten United States patents that cover certain key features of its
network which are used in locating and communicating with vehicles using the
cellular infrastructure.

         Management believes that several significant factors differentiate the
services which the Company is able to provide through its wireless enhanced
services network from conventional cellular service, including the following:

                  o Immediate Nationwide Call Delivery. In order to
         automatically (with no user intervention) provide immediate call
         delivery to cellular subscribers who travel outside of their home
         markets, a cellular carrier must install advanced switching equipment
         (IS-41 capable), establish physical connectivity and establish the
         appropriate roaming agreements with other cellular carriers. Primarily
         as a result of the cost of this advanced switching equipment, the
         Company believes that many cellular markets located outside of major
         metropolitan areas have not yet implemented automatic call delivery
         capabilities. HighwayMaster uses a patented 


                                       45
<PAGE>   51

         technology which works independently from cellular carriers' IS-41
         protocol to automatically provide immediate call delivery to its
         customers on essentially a nationwide basis.

                  o Fraud Control. Conventional cellular service has
         historically experienced relatively high levels of fraud. Industry
         sources estimate that cellular fraud resulted in losses totaling
         approximately $650 million in 1995. The Company has been able to
         significantly limit fraud through the architecture of its network,
         which requires that all calls originated by customers be routed to one
         of the switching complexes operated by or for the Company and thereby
         reduces or eliminates cellular cloning, fraud and call blocking for its
         customers. To date, neither the Company nor the cellular carriers which
         have properly implemented the Company's protocols have experienced any
         significant levels of roamer fraud in connection with the mobile
         communications services provided through the Company's network.

                  o Low Nationwide Fixed Airtime Charges. The Company believes
         that basic cellular air time charges for cellular subscribers who
         travel out of their home markets range from as much as $1.00 to $2.00
         per day per market and from $0.45 to $1.25 per minute, in addition to
         applicable long-distance charges. By comparison, the Company's
         customers in the long- haul trucking market are charged a fixed rate of
         $0.53 per minute for voice communications within the United States,
         which includes long-distance charges.

                  o Additional Value-Added Services. The Company offers its
         customers additional value-added services which are not offered by
         cellular carriers who are unable to supplement the capabilities of the
         existing cellular infrastructure with the features and capabilities of
         the Company's network. The value-added services currently offered by
         the Company include data transmission and fleet tracking, as well as a
         number of other ancillary services, such as estimating times of
         arrival, calculating fuel tax mileage and engine monitoring engine
         performance.

         The Company's principal executive offices are located at 16479 Dallas
Parkway, Suite 710, Dallas, Texas 75248, and its telephone number is (972)
732-2500.

BUSINESS STRATEGY

         The Company's objective is to become a leading provider of mobile
communications services to customers in its targeted markets. To achieve this
objective, the Company will seek to take advantage of the commercial potential
of the HighwayMaster network in four separate ways. First, the Company intends
to achieve greater penetration of the long-haul trucking market by continuing to
increase its base of Series 5000 Mobile Units installed in customers' trucks.
Second, the Company intends to use the capabilities of its network to develop
and implement new applications for the automotive and other markets, including
the AutoLink service to be offered to motorists in the United States and Canada.
Third, the Company intends to develop a common hardware platform for the
AutoLink product, the Series 5000 Mobile Units and more advanced versions of its
Series 3000 Mobile Units, which should enable it to leverage any volume cost
savings that may be derived from offering the AutoLink application to reduce the
price of its long-haul trucking products, thereby enabling the Company to expand
the segments of the long-haul trucking market which it is able to serve on an
economical basis. Fourth, the Company intends to pursue opportunities, either
alone or in cooperation with international partners, to export its technology
and applications to selected foreign markets.

THE LONG-HAUL TRUCKING SOLUTION

General

         The Company currently provides integrated mobile voice, data, tracking
and fleet management information services to trucking companies and other
private operators in the long-haul trucking market. These services are provided
by linking customers to the Company's network through the installation of Series
5000 Mobile Units in their trucks. The Series 5000 Mobile Unit enables a truck
driver to send and receive voice and data messages and utilize all of the other


                                       46
<PAGE>   52

features and capabilities of the Company's network. Management believes that the
system offered by the Company to trucking customers represents the most complete
and cost-effective package of mobile communications products and services
currently available to the long-haul trucking industry. A key feature of this
system is its ability to offer voice communication capabilities on essentially a
nationwide basis through the use of the existing cellular infrastructure.
Currently, the Company's primary competitor offers a satellite-based system that
provides data-only mobile communication services with no voice capabilities.

         In addition to its voice communications capabilities, the Series 5000
Mobile Unit permits the transmission and receipt of data messages between a
truck and a dispatcher. The Series 5000 Mobile Unit also has navigational
tracking capabilities which allow trucking companies to map a truck's position,
typically within 100 yards, anywhere in the United States and Canada.
Furthermore, the Series 5000 Mobile Unit is capable of performing a number of
other functions such as calculating fuel tax mileage, estimating times of
arrival, storing data and monitoring on-board electronic engine and other
electronic functions. For small to mid-sized fleets, the Company also offers a
dispatch software package that enables a trucking dispatcher to optimize the use
of its fleet by processing data transmitted by the Series 5000 Mobile Units and
performing a variety of fleet management information functions.

         The Company is currently engaged in developing the Series 3000 Mobile
Units, which will be less expensive and will offer more limited functionality
than its current long-haul trucking product. The Series 3000 Mobile Unit will be
able to perform voice communication services and additional functions such as
the automated capture and transmission of engine data and other information, as
well as vehicle tracking. The Company believes that the Series 3000 Mobile Units
will allow it to serve a broader segment of the long-haul trucking market,
including smaller fleets and owner- operators who do not require all the
features of the Series 5000 Mobile Unit but can benefit from the advantages of
the Company's wireless enhanced services network, as well as fleets who
currently utilize data-only mobile communications services provided by the
Company's competitors. The Company expects that preliminary versions of the
Series 3000 Mobile Unit will be introduced in early 1998, which will be
supplanted by a more advanced version of this product by the end of 1998.

The Trucking Industry

         Based on the Department of Commerce Census, management believes that
there are currently approximately 2.2 million long-haul commercial trucks in the
United States. Although the Company expects to generate sales of Series 5000
Mobile Units in all sectors of the long-haul trucking market, the Company's
primary target market for this product is operators of mid- and large-sized
fleets (25 or more trucks) consisting of larger-sized trucks (Class 6, 7 and 8
trucks) used for long-haul transport (average distances in excess of 100 miles).
Based on the Department of Commerce Census, management estimates that there are
currently approximately 530,000 trucks in the primary target market for the
Series 5000 Mobile Unit. Management further estimates that approximately 30% of
these trucks are currently equipped with some form of integrated mobile
communications solution, but believes that substantially all operators in this
market will experience significant competitive pressures over the next five
years to adopt some form of integrated mobile communications solution. In
addition, the Company intends to introduce the Series 3000 Mobile Unit, and
management believes that these products are likely to appeal to small-sized
fleets (24 or fewer trucks) consisting of larger- sized trucks used for
long-haul transport, as well as fleets of smaller-sized trucks (Class 1-5
trucks) used for the same purposes. Based on the Department of Commerce's
Census, the Company believes that there are currently approximately 1.7 million
trucks in this extended market for the Series 3000 Mobile Unit.

         The following table summarizes certain information regarding the
segments of the long-haul trucking market discussed above:


                                       47
<PAGE>   53

<TABLE>
<CAPTION>
                                                 AVERAGE                        PRIMARY       ESTIMATED
                      PRIMARY BENEFITS           LENGTH         TRUCK           MARKET         MARKET
   PRODUCT              TO CUSTOMERS             OF HAUL      CLASSES(1)      FLEET SIZES      SIZE(2)
   -------            ----------------           -------      ----------      -----------     ---------
<S>                 <C>                        <C>            <C>            <C>              <C>    
Series 5000         Fleet management,          > 100 miles    Classes 6-8    25 and greater     530,000
Mobile Unit         including integrated                  
                    voice, data and
                    position/location
                    solution

Series 3000         Lower priced mobile        > 100 miles    Classes 6-8    1-24               270,000
Mobile Unit         voice communications                      Classes 1-5    All              1,400,000
                    and limited
                    additional
                    functionality
</TABLE>

- ----------

(1)       Truck classes 1 to 5 represent trucks weighing up to 19,500 pounds and
     truck classes 6 to 8 represent trucks weighing over 19,500 pounds.

(2)       Some portion of this market is already equipped with a form of 
    integrated mobile communications system.

         The types of companies that make up the Company's primary target market
are private and for-hire fleet operators, owner-operators and other operators of
larger-size trucks for long-haul transport. For-hire carriers are companies
whose primary business is trucking and whose revenues are from transporting
goods on a for-hire basis. Private fleets are operated by non-trucking firms
that haul their own freight. Owner/operators are individuals who own and operate
their own trucks. Some owner-operators work for a single company under a lease
agreement, while others work with transportation brokers to find loads or
operate their own small transportation businesses.

Mobile Communications Needs in the Trucking Industry

         The Company believes that demand for the Company's long-haul trucking
application will continue to grow as trucking companies experience increased
industry competition and face mounting internal and external pressures to adopt
mobile communications systems.

         External pressures include competition from the increasing number of
trucking companies that are installing mobile communications systems, demands
placed on the long-haul trucking industry to meet just-in-time inventory
demands, and regulatory and environmental requirements. The Company estimates
that at the present time there is an installed base of approximately 160,000
integrated mobile communications systems (including those sold by the Company)
in trucking fleets operating in the United States. As just-in-time delivery
inventory control becomes more prevalent, manufacturers increasingly will
require that materials arrive immediately before incorporation into the
manufacturing process. The resulting pressure on trucking companies has
stimulated demand for more efficient two-way communications systems to assure
on-time pick-up and delivery, improved load matching within a widely dispersed
fleet and current tracking of shipment location. In fact, certain large shippers
require all new contracting trucking companies to be equipped with on-board
communications and tracking equipment. Additionally, trucking companies must
maintain detailed records relating to miles driven by state, hours driven by
each driver and other information. Some hazardous substances may only be
transported over certain routes.

         Internal pressures include containing costs through improved operating
efficiency, improving driver quality of life thereby reducing critical turnover
rates, and increasing the safety of drivers, capital equipment and cargo by
reducing the likelihood of accidents. The Company's long-haul trucking
application assists trucking companies in improving efficiency by increasing the
utilization of equipment and reducing the number of empty miles and out-of-route
miles. Because of the features and capabilities of the Company's system, it is
not necessary for truck drivers to 


                                       48
<PAGE>   54

make frequent stops to place telephone calls to dispatchers. In addition, the
Company's system allows swift and efficient matching of drivers with shipments,
thereby reducing layovers and fuel costs associated with empty miles.

         With driver turnover approaching 100% in the trucking industry today,
the Company believes that trucking companies can increase driver satisfaction
and be more successful in attracting and retaining competent drivers by giving a
driver the ability to contact or be contacted by family and friends while on the
road. Furthermore, since driver bonuses are often calculated based on loaded
miles driven and overall efficiency, drivers benefit from a system that allows
them to be more efficient and avoid unnecessary stops.

         Finally, by allowing a driver to communicate using "hands free"
voice-activated equipment while traveling, the Company's system minimizes the
distractions and hazards of placing or receiving a call while on the road. Voice
commands spoken into a microphone clipped to the visor and synthesized voice
responses from the Series 5000 Mobile Units provide a safety advantage over
traditional cellular telephones, which must be grasped with one hand during
operation, and over full keyboard typing necessary to operate competing
satellite-based systems, which drivers are not permitted to use while the
vehicle is in motion. Further, by enabling the driver to communicate while
traveling in his vehicle, the HighwayMaster system reduces stops to make
telephone calls at truck stops, where management believes a large percentage of
all trucking accidents occur. The HighwayMaster system also automatically
reports time, speed and routes driven by each truck to the dispatcher, which can
be used to enhance safety troubleshooting and driver safety counseling, and the
tracking service enables the trucking company to locate stolen trucks or trucks
involved in a roadside emergency.

PRODUCTS AND SERVICES

         The Company has developed, or is in the process of developing, three
mobile communications applications: (i) the Series 5000 Mobile Unit, (ii) the
Series 3000 Mobile Unit and (iii) the AutoLink product.

SERIES 5000

         The Company currently provides mobile communications services to its
customers in the long-haul trucking market by linking them to the Company's
network through the installation of Series 5000 Mobile Units in their trucks.
The Series 5000 Mobile Unit enables a truck driver to send and receive voice and
data messages and utilize all of the other features and capabilities of the
Company's network. Management believes that the Series 5000 Mobile Unit
represents the most complete and cost-effective package of mobile communications
products and services currently available to the long-haul trucking industry.

         Series 5000 Mobile Unit. The Series 5000 Mobile Unit includes the
following: (i) a menu-driven display module which provides two large lines of
scrollable text on the dashboard, (ii) a microphone which clips on the sun visor
for "hands free" communication utilizing voice-recognition and voice-synthesis
technologies, (iii) a modified cellular telephone handset and cradle, (iv) a
cellular antenna, (v) a GPS navigational antenna, and (vi) a computerized system
module in the vehicle which contains the positional reporting device, the
cellular transceiver and the on-board computer. The system module also houses
voice-activation and voice-synthesis software, data storage capability and
unique technology that significantly reduces the risk of cellular roaming fraud.
The module provides ports to allow for incorporation of current and future
peripheral equipment, such as a fax machine, scanner, printer, engine monitoring
equipment and trailer temperature monitoring. The Series 5000 Mobile Unit was
designed to be "user-friendly," to have installation times that are shorter than
competing satellite unit installations, and to limit driver training to an
average of one hour. The system module is remotely programmable from the host
computer by the trucking company and by HighwayMaster.

         Pricing. The Company's Series 5000 products and services are
economically priced to appeal to a wide range of participants in the long-haul
trucking industry. The Company offers the Series 5000 Mobile Unit at a retail
price of $1,995, with tiered discounts for larger volume purchases. The
Company's customers are charged a flat fee of $0.53 per 


                                       49
<PAGE>   55

minute for voice communication within the United States and $0.64 per minute for
cross-border communication in Canada, which includes all cellular air time and
long-distance charges, $0.48 per minute for data transmission within the United
States and $0.59 for cross-border data transmissions and $41 per month per
installed Series 5000 Mobile Unit to utilize the system. When the parties
sending and receiving voice communications are both located in Canada, customers
are generally charged amounts which are higher than the flat fees described
above. In addition, callers are charged a fee for each call billed to a separate
account, such as a credit card, calling card or HighwayMaster account. The
Series 5000 Mobile Unit is installed in the customer's trucks, and the
dispatcher is equipped with mapping and management software at no additional
charge. This software can be integrated into the host computer systems operated
by the Company's customers or can be installed and operated on a personal
computer equipped with a hard disk and a modem.

         Voice Communications. The Company provides nationwide voice
communications services at a rate of $0.53 per minute for calls within the
United States. By comparison, management believes that currently available
cellular call delivery systems for subscribers who travel out of their home
markets require the payment of rates that are higher than those charged by the
Company. The driver controls the functions of the Series 5000 Mobile Unit by an
enhanced cellular telephone handset. A microphone clipped to the truck's visor
and voice-recognition capability also allow the system to be controlled by the
driver's voice commands. While in a cellular region covered by HighwayMaster, a
driver may initiate telephone calls to any phone number pre-approved by the
dispatcher, and the dispatcher may initiate telephone calls to the driver.
Drivers may be issued calling card accounts by HighwayMaster or use selected
credit cards, for units operating under the NSC, or may be issued calling cards
by AT&T, for units operating under the AT&T Complex, that allow them to place
personal telephone calls to any telephone number. Such calls are billed
separately to the drivers' home addresses. See "-- Infrastructure and Operations
- -- Enhanced Service Complexes." The nationwide call delivery feature, combined
with calling-party payment for calls, sets the Company's product apart from
conventional cellular service.

         Data Transmission. The Series 5000 Mobile Unit permits the transmission
and receipt of data between a truck and a dispatcher. The $0.48 per minute
charge for data transmissions within the United States translates into costs as
low as $0.0007 per character for a typical dispatch message of between 600 and
700 characters. The dispatcher may type free form data messages, which appear on
the driver's data display screen on the dashboard and can be stored for future
reference. The driver may send up to 99 pre-programmed status messages with
accompanying numerical data such as "At Dock Loading" or "Trailer Number 21"
that automatically update the trucking company's host computer, eliminating the
data entry function a dispatcher must perform at the trucking company. The
driver also may enter status messages by voice command or through the telephone
handset keypad. Certain options allow the Series 5000 Mobile Unit to monitor
engine speed and temperature, automatically transmitting the data to the
trucking company. Future enhancements may allow for trailer temperature
monitoring and other features.

         Facsimile Transmission. The Company provides nationwide facsimile
communications services at a rate of $0.53 per minute for either local or
long-distance fax transmissions. Fax Interface is a recent product advancement
which assists customers in transmission and receipt of documents such as bills
of lading, permits and detailed instructions that a truck driver might need on
an immediate basis.

         Fleet Tracking. Precise position and historical route reports are
automatically provided to the dispatcher's computer with each call to or from
the truck. For the cost of $0.48 per minute of data transmission time within the
United States and $0.59 per minute for cross-border data transmissions, the
dispatcher can obtain a real-time position report from a specific truck by
keyboard request. Reports are generally accurate to within 100 yards. These
reports include position logs, which are stored internally, providing historical
route information even if the truck travels out of cellular coverage. A trucking
company's use of these tracking capabilities can improve management and
facilitate better customer service. The navigational tracking capabilities of
the Series 5000 product reduce the number of out-of-route miles and facilitate
efficient matching of drivers with loads, thereby reducing expenses and empty
miles driven.


                                       50
<PAGE>   56

         Fleet Management Software and Information Services. The Company's
dispatch software package is used primarily by mid- to small-sized fleets and
enables a trucking dispatcher to optimize the use of its fleet by processing
data transmitted by its Series 5000 Mobile Units, managing dispatch records,
driver logs, state fuel tax calculations, route planning and other functions.
The dispatch software can be loaded on to a personal computer equipped with a
modem, or the system can be interfaced directly to be networked with a midrange
or a mainframe computer for access by the dispatcher or a shipper. The software
performs essentially three functions: (i) order entry, (ii) dispatch and
tracking, and (iii) truck reconciliation and mapping. The order entry function
stores and manages the ordering information related to each shipment, including
the assignment of loads to specific trucks, required delivery times and bills of
lading. The dispatch and tracking function utilizes GPS location information
along with data entered by the driver, to provide information for any truck
within the fleet, including destination, load, drivers' identification and
mileage driven. The truck reconciliation and mapping application provides
historical information such as percentage of on-time deliveries and miles driven
per state for fuel tax calculation. An online interstate highway map can be used
to graphically plot the routes traveled by each truck. The system can highlight
trucks that are running behind schedule or are available for load pick-ups.

         The principal software suppliers that currently market full feature
software application programs to trucking companies offer interfaces to the
HighwayMaster system (which allow data communication directly between the
trucking company's existing mainframe computer and Series 5000 Mobile Units
installed in their trucks). This allows the larger fleet customers who have
their own dispatch software on a mainframe system to continue to use their
existing dispatch software and interface with the HighwayMaster system. These
third party software suppliers generally offer the customized HighwayMaster
interface at reasonable cost directly to their customers. HighwayMaster provides
some custom interface development to very large customers.

         In April 1997, the Company entered into an agreement with Burlington
which provides for the installation of up to 2,000 Series 5000 Mobile Units in
Burlington's fleet of long-haul trucks. As part of the transaction, the Company
purchased exclusive ownership rights to Burlington's proprietary fleet operating
and management information software and has assumed the operation of its data
center and computer systems. The Company intends to add capacity to the
Burlington data center in order to provide a broad range of data processing
services to other trucking companies, which would essentially replace such
companies' existing management information systems departments with services,
software and hardware to be provided by the Company. Added capacity would enable
the Company to use the Burlington software and data center in conjunction with
the HighwayMaster network to offer its customers levels of integration not
previously available in the trucking industry. Management currently expects that
the primary market for the data processing services to be offered by the Company
will consist of mid-size fleets which have significant fleet management and
other logistical requirements but have not yet made substantial investments in
information technology. The Company is not currently providing these services,
and there can be no assurance that it will be successful in marketing its
information management solutions to other trucking companies.

         Rolling ETA. Rolling ETA(TM) is an enhancement to the Company's Series
5000 Mobile Unit which instructs the microprocessor mounted inside the truck to
calculate the estimated arrival time based upon average speed, hours per day and
delivery parameters and alerts the driver and dispatcher automatically if the
truck is going to miss an arrival time.

         Fuel Tax Calculation. The Company is using a software program known as
MileMaster to help customers automate their fuel tax calculations. MileMaster is
an enhancement to the Company's Series 5000 Mobile Unit and the accompanying
host software which allows the Company to provide an automatic, paperless log of
the actual mileage driven in each state as well as state-line crossings for each
truck. This allows the Company's customers to implement an automated fuel tax
calculation system that eliminates the need for drivers to hand-log their
mileage, dates and times as they cross state lines and eliminates the
possibility of human data entry errors.


                                       51
<PAGE>   57

Current Installed Base

         The number of Series 5000 Mobile Units installed in customer vehicles
has grown at a relatively steady rate since commercial operations began in
September 1993. As of June 30, 1997, the Company had installed approximately
25,233 Series 5000 Mobile Units, and had orders to install an additional 9,059
Series 5000 Mobile Units.

         In late 1996 and 1997, the Company received substantial new orders for
Series 5000 Mobile Units from new customers. For example, in September 1996 the
Company received orders for a total of 2,000 Series 5000 Mobile Units from
Ameritruck and in April 1997, the Company received an order from Wal-Mart for an
aggregate of 3,000 Series 5000 Mobile Units to be installed in its private fleet
of trucks. Likewise, in early 1997, the Company received an order from
Burlington for the installation of up to 2,000 Series 5000 Mobile Units in
Burlington's trucking fleet. As part of the transaction with Burlington, the
Company purchased exclusive ownership rights to Burlington's proprietary fleet
operating and management information software and is assuming the operation of
its data center and computer systems. The Company expects that substantially all
of the Series 5000 Mobile Units ordered by Wal-Mart and Burlington will be
installed prior to December 31, 1997.

         The Company's order backlog is based upon signed contracts pursuant to
which customers have agreed to purchase the applicable Series 5000 Mobile Units
and install them in their fleets of long-haul trucks (although in a limited
number of cases the obligation to take delivery of Series 5000 Mobile Units is
subject to satisfactory completion of a test program). Customer contracts
generally do not specify delivery dates and, as a result, the exact timing of
delivery and installation of the Series 5000 Mobile Units ordered by customers
is frequently the subject of further discussions and negotiations between the
Company and its customers. Historically, not all Series 5000 Mobile Units
included in the Company's backlog have resulted in product sales. See "Risk
Factors -- Backlog; No Firm Delivery Dates."

         For customers commencing service prior to June 29, 1996, the Company
and AT&T offer mobile communications services under joint service contracts,
signed by the Company, AT&T and their joint customers. Customer contracts
generally commit the Company and AT&T to provide services for a one-year term,
but in some cases contracts entered into before July 1994 commit the Company and
AT&T to provide services for a five-year term. Customers typically may terminate
their contracts during the initial term only in the event of a material breach
by either the Company or AT&T. At the expiration of the initial term, the
contracts continue in effect on a month-to-month basis unless terminated upon 30
days' notice by either party. AT&T invoices customers directly for all enhanced
telecommunications and cellular services, and the Company and AT&T generally may
raise their rates upon 30 days' notice.

         Customers who are receiving service through the NSC sign a service
contract which generally commits the Company to provide services for a one-year
term. At the expiration of the initial term, the contracts continue in effect on
a month-to-month basis unless terminated upon 30 days' written notice by either
party. The Company directly invoices customers served by the NSC for all
enhanced telecommunications services and cellular services, and contract terms
generally permit the Company to increase its service charges to customers upon
30 days' written notice.

Marketing and Distribution

         The Company sells its long-haul trucking application to fleet buyers
primarily through its direct sales force located throughout the nation. As of
June 30, 1997, the Company's direct sales force consisted of 17 persons. This
sales force focuses its efforts on fleets ranging in size from 20 to 3,000
trucks. Accordingly, to increase sales productivity and efficiency and to
decrease sales expenses, the Company has reduced overlaps in sales territories
and made certain related organizational changes. In addition, the Company
intends to intensify its efforts to reach accounts with over 1,000 trucks in
their fleet. Sales to these major accounts generally require a sustained
marketing effort over a period of at least several months. In some cases, major
accounts insist on competitive evaluations or in-the-field test programs prior
to making a commitment to purchase Series 5000 Mobile Units. To target these
major accounts, the Company has 


                                       52
<PAGE>   58

created a national account group that is dedicated to these strategic prospects.
National marketing support for the sales teams includes print advertising in
industry journals, direct mail, radio networks popular with truckers, industry
trade shows and on-site marketing promotions.

Product Manufacturing and Supply

         Comptronix Corporation assembled the Series 5000 Mobile Units until the
third quarter of 1996, when it sold substantially all of its assets and assigned
its customer purchase orders to Sanmina. After the sale, Sanmina has continued
production of Series 5000 Mobile Units for the Company under the same prices and
terms as its prior arrangement with Comptronix Corporation. The Company recently
entered into an agreement with K-Tec for the assembly of Series 5000 Mobile
Units. In the future, the Company plans to order Series 5000 Mobile Units from
both Sanmina and K-Tec. The various components used by Sanmina in the assembly
of the Series 5000 Mobile Units (including GPS components and cellular
transceivers) are obtained from certain other manufacturers. All transceivers
for the Series 5000 Mobile Units are manufactured by Motorola, and the Company
believes that there are a limited number of suppliers that are capable of
manufacturing transceivers that meet the Company's requirements. See "Risk
Factors -- No Long-Term Product Supply Arrangements."

Customer Service and Warranty

         HighwayMaster operates a 24-hour, seven days a week customer support
service center to handle customer questions and requests. Regional installation
and customer service offices have been established in Atlanta, Chicago, Dallas,
Philadelphia and Salt Lake City. In addition, HighwayMaster assigns account
service representatives to each account of 20 or more trucks to give
personalized training and to assist in configuring the system to provide the
greatest possible economic impact. A one-year limited warranty is provided to
all purchasers of Series 5000 Mobile Units, inclusive of parts, labor and
diagnostic work.

         The Company has trained personnel in authorized service centers to
perform installations and warranty of Series 5000 Mobile Units at locations
nationwide, with additional locations to be activated pending training.
Independent contractors in strategic locations throughout the United States have
also been trained to perform installations, charging a fixed rate for each
Series 5000 Mobile Unit installed. In addition, each account of 25 or more
trucks receives two days installation services for which the customer can elect
to have a HighwayMaster representative install Series 5000 Mobile Units or train
personnel of the customer to perform their own installations.

SERIES 3000

         The Company is currently engaged in developing the Series 3000 Mobile
Units, which will be less expensive and will offer more limited functionality
than its current long-haul trucking product. The Series 3000 Mobile Unit will be
able to perform voice communication services and additional functions such as
the automated capture and transmission of engine data and other information as
well as vehicle tracking. The Company believes that the Series 3000 Mobile Units
will allow it to serve a broader segment of the long-haul trucking market,
including smaller fleets and owner-operators who do not require all the features
of the Series 5000 Mobile Unit but can benefit from the advantages of the
Company's wireless enhanced services network, as well as fleets who currently
utilize data-only mobile communications services provided by the Company's
competitors. The Company expects that preliminary versions of the Series 3000
Mobile Unit will be introduced in early 1998, which will be supplanted by a more
advanced version of this product by the end of 1998.

         The preliminary version of the Series 3000 Mobile Unit will consist of
(i) a cellular telephone handset and cradle, (ii) a cellular antenna and (iii) a
computerized system module. The advanced version of the Series 3000 Mobile Unit
will add a GPS navigational antenna and a more sophisticated computerized system
module. The advanced version of the Series 3000 Mobile Unit will be based upon
the hardware platform currently being developed by the Company in connection
with the AutoLink service. See "-- AutoLink." This version will be capable of
interfacing with the 


                                       53
<PAGE>   59

vehicle's engine and allow the customer to add optional software enhancements to
enable the unit to perform additional services such as estimating times of
arrival and performing fuel tax calculations.

         The Series 3000 Mobile Unit will be attractively priced in order to
achieve as high as possible a level of penetration in the targeted segments of
the long-haul trucking industry. The Company expects that the Series 3000 Mobile
Unit will be sold at a retail price of approximately $500. Customers who utilize
the Series 3000 Mobile Unit will pay the same low, fixed per-minute rates for
voice and data communications as those who utilize the Series 5000 Mobile Unit,
but will be assessed a reduced per unit charge on a monthly basis.

Target Market

         The Company expects that its primary target market for the Series 3000
Mobile Unit will consist of small and mid-sized fleets and owner-operators who
operate larger-sized trucks (Class 6, 7 and 8 trucks) used for long-haul
transport (average haul in excess of 100 miles). Based on the Department of
Commerce Census, the Company estimates that there are approximately 270,000
trucks in this target market. Furthermore, the Company believes that the Series
3000 Mobile Unit will appeal to a significant portion of fleets who operate
smaller-sized trucks (Class 1-5 trucks) for long- haul transport, which include
an estimated 1.4 million trucks. The Company believes that the lower cost of the
Series 3000 Mobile Unit should enable it to achieve significant penetration in
these segments of the long-haul trucking industry given the strong demand for
lower-cost voice communications services.

Marketing and Distribution

         In order to market the Series 3000 Mobile Unit, the Company intends to
use a sales strategy that combines direct mail, targeted telemarketing and print
advertisements. The Company will use direct mailings and targeted telemarketing
to contact potential long-haul trucking customers and inform them of the
features and benefits of the Series 3000 Mobile Unit. This approach will be
supplemented by print advertisements in trade journals and other publications to
introduce and increase awareness of this product in the trucking industry.

Product Manufacturing and Supply

         The Company recently entered into an agreement with K-Tec to assemble a
preliminary version of the Series 3000 Mobile Unit which the Company plans to
introduce in early 1998. The Company is also negotiating with Motorola to supply
a hardware component that will provide a common platform for both the more
advanced version of the Series 3000 Mobile Unit and the AutoLink product. There
can be no assurance that the Company will be able to make arrangements with
Motorola or with any other third party hardware supplier or suppliers to
manufacture the hardware components of the advanced versions of the Series 3000
Mobile Units or, if successful in making such arrangements, as to the terms
thereof.

AUTOLINK

         In January 1997, HighwayMaster entered into a strategic business
alliance with Prince pursuant to which the parties will develop and provide the
AutoLink service to motorists in the United States and Canada. Prince is a
subsidiary of Johnson Controls and a leading supplier of automotive interior
systems and components. In the fiscal year ended September 30, 1996, Prince had
consolidated net sales of $867 million. The basic AutoLink service will provide
an intelligent communications link from the vehicle to the AutoLink Complex with
connections to various emergency, roadside assistance and information services
suppliers in order to provide emergency assistance, roadside assistance and
information services to motorists, including remote tracking of stolen or
missing vehicles. The principal components of the AutoLink system are (i) the
end-user interface, which will be designed and manufactured by Prince, (ii) the
in-vehicle communications and location hardware, which will be manufactured by
Motorola to the Company's specifications and will incorporate certain of the
Company's patented technology, and (iii) the wireless enhanced services network,
which will be provided and managed by the Company.


                                       54
<PAGE>   60

         The AutoLink product will be offered to both the OEM market (original
equipment manufacturers) and the after-market (owners of existing vehicles). The
Company currently expects that the AutoLink service will be offered on a
commercial basis in the after-market beginning in late 1998 and in the OEM
market beginning in the second half of 1999.

Joint Development Agreement

         The Company and Prince are parties to an agreement (the "Joint
Development Agreement") which defines their respective roles and
responsibilities in connection with the development and marketing of the
AutoLink service. The Joint Development Agreement provides that the Company will
(i) be responsible for providing access to the Company's network for the
AutoLink service, (ii) provide general assistance in connection with the design
and development of the AutoLink service, including with respect to network
functionality, product functionality and cellular carrier activation, (iii)
coordinate and negotiate agreements to ensure the availability of emergency,
roadside assistance and information services and (iv) have overall program
responsibility for offering the AutoLink service to the after-market. Prince
will (i) have overall program responsibility for offering the AutoLink service
to OEM customers, (ii) be responsible for the marketing and sale of the AutoLink
system to OEM customers, (iii) coordinate the development of various information
services by one or more suppliers for the OEM customer market and (iv) develop
the end user interface for the AutoLink system, as well as an electronic
interface to the automobile's in-vehicle communications and location hardware.
The name "AutoLink" is a registered trademark of Prince and, under the terms of
the Joint Development Agreement, may be used by the Company only with respect to
the integrated package of services jointly offered by the parties. The term of
the Joint Development Agreement will expire on January 23, 2002, unless earlier
terminated upon the occurrence of specified events.

         Under the Joint Development Agreement, the Company expects to receive
from Prince a one-time design fee and reimbursement for certain development
costs. In addition, in consideration of the services provided in the OEM market,
the Company will receive certain fees, including an activation fee, a monthly
per-user charge and service charges for calls placed by or for end-users. The
risk of collection from end-users in the OEM market will generally be borne by
Prince. With respect to the provision of services to the after-market, the
Company will determine the nature and amount of the charges to end-users. Any
fees or charges related to after-market services which exceed the amount of the
fees which the Company would receive for such services in the OEM market will be
equally divided between the Company and Prince. The risk of collection from end-
users in the after-market will generally be borne by the Company. All amounts
received by the Company in connection with the AutoLink business alliance will
be in consideration of network management and other services, and the Company
does not expect to generate any revenues or profits from the sale of the
AutoLink hardware in either the OEM market or the after-market.

         The AutoLink project is in its preliminary stages. Accordingly, the
Joint Development Agreement may need to be modified and amended to reflect
developments and understandings reached by the parties as the AutoLink project
matures.

AutoLink Product

         The AutoLink product will consist of (i) an end-user interface, into
which there will be integrated a small display module, (ii) a cellular
transceiver, (iii) a computerized system module, (iv) a cellular speaker, (v) a
cellular antenna and (vi) a GPS navigational antenna and receiver. The Company
currently expects that the end-user interface will be located in the vehicle's
rearview mirror or in an overhead console within easy reach of the driver. The
other components of the AutoLink product will be located apart from the end-user
interface in order to improve performance and enhance the security features of
the system.

         The design of the AutoLink product has required that the Company, in
conjunction with Prince and its hardware suppliers, develop miniaturized
versions of the principal components included in its Series 5000 Mobile Unit and
reduce hardware costs so that the AutoLink product may be offered at a
relatively low price level. The Company intends to take 


                                       55
<PAGE>   61

advantage of the AutoLink design process by incorporating the key technical
features of the AutoLink product into future versions of its Series 5000 Mobile
Unit and Series 3000 Mobile Unit. In addition, the Company will seek to leverage
any volume cost savings that may be derived from the purchase of the AutoLink
product to reduce the price of its long-haul trucking products, thus expanding
the segments of the long-haul trucking market which it is able to serve on an
economical basis.

         The AutoLink service will be an in-vehicle communication, location and
information service which will offer a variety of safety, security and
convenience features to end users. These services include the following:

                  Emergency Assistance. By pushing a button on the user
         interface, a driver will be connected with an AutoLink service
         representative and request emergency assistance. If requested by the
         driver or automatically in the event of certain emergencies, the
         AutoLink service representative will arrange for the dispatch of local
         emergency services to the precise location of the vehicle, which will
         be pinpointed using the GPS location capabilities of the AutoLink
         product.

                  Roadside Assistance. By pushing a different button on the user
         interface, a driver will be connected with an AutoLink service
         representative and request roadside assistance in the event of an
         accident, break down or similar occurrence. The AutoLink service
         representative will have access to a network of participating roadside
         assistance providers to be assembled by the Company in the case of the
         after-market and by the OEM in conjunction with their vehicle warranty
         program in the case of the OEM market. Based on the location of the
         vehicle and the nature of the service required, the representative will
         select and dispatch an appropriate roadside assistance provider.
         Furthermore, since the AutoLink product can be connected to the engine
         and other electronics on the car, the service representative will have
         the ability to do certain things for car owners, such as unlock car
         doors when keys have been accidentally locked inside, track stolen
         vehicles, and even allow automotive service centers to directly access
         engine functions and diagnose a problem before the car is brought in
         for service.

                  Information Services. The AutoLink product will eventually
         provide drivers with a wide range of information services. For example,
         because the AutoLink service can automatically pinpoint the location of
         a vehicle, the AutoLink service representative will be able to provide
         a lost driver with directions to his destination. Other information
         services that may be provided through the AutoLink product include
         traffic, weather, news, vehicle location and short message services.

Target Markets

         There are currently 198.3 million vehicles on the roads in the United
States. In addition, the number of new vehicles sold in the United States in
1996 totaled approximately 15.4 million.

         The OEM customer market consists of new manufactured vehicles in which
the AutoLink product is installed by the manufacturer, at the point of import or
by an authorized dealer for whom the manufacturer has placed an order. In most
cases, it is expected that the automotive end-user will secure the AutoLink
services (i) as a part of a vehicle option package, in which case the price of
the services may be included in purchase price for the vehicle or (ii) through
the payment of a monthly service fee by the end user.

         The after-market consists of all markets other than the OEM market. In
most cases, aftermarket sales will consist of sales to the owners of existing
vehicles. Vehicle owners electing to receive the AutoLink service will pay for
the AutoLink product and the installation thereof, as well as a monthly service
fee.


                                       56
<PAGE>   62

Marketing and Distribution

         Prince will be responsible for marketing, sales and distribution of the
AutoLink product in the OEM market. It is expected that Prince will leverage its
experience in the automotive industry and relationships with automobile
manufacturers to obtain orders for the AutoLink product beginning with the 2000
model year, which will be introduced by automobile manufacturers in the second
half of 1999, although there is no assurance that this will be the case. To
date, no orders have been placed for the AutoLink product, although Prince is
currently engaged in discussions and negotiations with various automobile
manufacturers. Prince will also assume lead responsibility for sales of the
AutoLink product in the recreational vehicle and automobile dealer distribution
channels of the aftermarket business.

         HighwayMaster will be responsible for marketing, sales and distribution
of the AutoLink product in the after-market. At the present time, the Company
intends to establish distribution arrangements with one or more cellular
distributors and resell the product to cellular carriers who are included in the
Company's enhanced wireless network. It is expected that these cellular carriers
would offer the AutoLink product to consumers in conjunction with or as an
enhancement to local cellular service. The Company has entered into a memorandum
of understanding with CellStar which contemplates that CellStar will act as the
exclusive distributor for the AutoLink product in the aftermarket. The Company
expects that its arrangements with CellStar will be governed by a definitive
distribution contract which will provide for an initial two-year term commencing
from the initial date of factory production. There can be no assurance that the
Company and CellStar will in fact enter into such a distribution contract or as
to the terms thereof, which are expected to be the subject of further
negotiations between the parties. Assuming that satisfactory arrangements can be
made for distribution of the AutoLink product, the Company expects to begin
offering the AutoLink service in the after-market beginning in late 1998.

Product Manufacturing and Supply

         Prince and the Company are currently in negotiations with Motorola to
manufacture the in- vehicle communications and location hardware included in the
AutoLink product but no assurance can be given that such an agreement will be
reached or as to the terms thereof. In the case of products to be sold in the
OEM market, orders will be placed with the hardware supplier either by Prince or
directly by automobile manufacturers who elect to incorporate the AutoLink
product into their vehicles. In the case of products to be sold in the
after-market, the Company expects that, in order to accelerate the launch of the
AutoLink service, it may be necessary for it to place an order with the hardware
supplier for up to 100,000 units. Under the terms of any such order, the Company
would be directly responsible for payment of the purchase price for these units.
Although no assurances can be given in this regard, the Company believes that it
should be able to make satisfactory arrangements with potential distributors and
cellular carriers pursuant to which they would undertake to purchase and resell
all or substantially all of these units in the after-market.

Network Management Services

         Under the Joint Development Agreement, the Company will be responsible
for managing and monitoring network services and ensuring that the AutoLink
service has access to a nationwide, proprietary cellular network. In addition,
it will be required to identify and engage a third party to conduct network
system performance and design reviews to ensure that the network operates in
accordance with the agreed specifications. In order to fulfill its network
management obligations, the Company is currently planning to construct the
AutoLink Complex in 1998 at a projected cost of approximately $4 million. In
addition, in order to begin offering the AutoLink service on a commercial basis,
it will be necessary for the Company to amend its contracts with cellular
carriers to allow the Company to utilize their cellular systems to provide
emergency and roadside assistance service to motorists in their home markets.
The Company has begun to seek amendments to its contracts with cellular carriers
and to date has amended the contracts with more than 35 carriers. There can be
no assurance that it will be able to obtain amendments covering all areas in
which it currently provides mobile communications services to long-haul trucks.
See "Risk Factors -- Dependence on Cellular Infrastructure" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations."


                                       57
<PAGE>   63

INFRASTRUCTURE AND OPERATIONS

Network Configuration

         The diagram set forth below depicts the configuration of the
HighwayMaster network, as it is currently utilized to provide services through
the Series 5000 Mobile Units and is expected to be utilized to provide services
through the Series 3000 Mobile Units and the AutoLink product:

         Diagram of HighwayMaster network, which illustrates the connections
among (1) the mobile communications unit, (2) the cellular carrier, (3) GTE-TSI,
(4) EDS, (5) a switching complex, (6) long distance and local exchange carriers,
(7) the dispatcher PC, (8) all other telephones, (9) GPS satellites, (10) the
AutoLink emergency response center (in the case of the AutoLink product only)
and (11) roadside assistance, emergency response and information services
providers (in the case of the AutoLink product only).

         Series 5000 and 3000 Mobile Units. The processes illustrated above are
fully automated, allowing communication with drivers from any telephone in the
United States and Canada. As the driver enters a new cellular coverage area, the
HighwayMaster unit (1) automatically sends an identifying signal to the cellular
carrier (2). This cellular carrier information is sent via specialized hardware
and software provided by GTE-TSI (3) and occasionally EDS (4) to a switching
complex owned by AT&T or HighwayMaster (5) so such switching complex will be
able to direct future incoming calls for that driver to the appropriate cellular
carrier. In the third quarter of 1996, the Company began commercial service with
its own switching complex, the NSC. For new customers commencing service since
July 1, 1996, all transmissions are routed through the NSC. For most customers
commencing service prior to such time, transmissions continue to be routed
through the AT&T Complex. See "-- Enhanced Service Complexes."

         When the driver makes a phone call, the HighwayMaster unit (1) is
connected to a switching complex (5) via the cellular carrier (2) and existing
long distance lines (6), and such switching complex switches the call to the
appropriate destination, which may be the Dispatcher PC for data (7) or any
other telephone for voice (8). The Company's NSC requires entry of a personal
billing account or selected credit card number, and the AT&T Complex requires
entry of an AT&T Calling Card number, for separate billing of personal calls.
See "-- Enhanced Service Complexes."

         When dispatchers or outside callers desire to call a driver, their
calls are switched by the switching complex (5) directly over existing long
distance lines and local exchange carriers (6) to the appropriate cellular
carrier (2), which completes the call to the driver (1). Data messages are first
stored in the switching complex (5) and then passed to or from the Dispatcher PC
(7) and the HighwayMaster unit (1).

         The HighwayMaster unit (1) automatically records a precise position
report obtained from GPS satellites (9) on a continuous basis. This log of
reports and any other stored data is uploaded to the appropriate switching
complex with every business voice or data call made to or from the HighwayMaster
unit. Additionally, the Dispatcher PC (7) can initiate a call at any time to
obtain an immediate position report from any truck.

           AutoLink Product. By pushing a button on the user interface (1) or
automatically in certain circumstances (such as in the event of airbag
deployment), the AutoLink product is connected to a switching complex (5) via
the cellular carrier (2) and existing long distance lines (6). The switching
complex routes the call to the appropriate AutoLink response center (10) and the
driver of the vehicle is connected with an AutoLink service representative. The
AutoLink product (1) automatically records a precise position report obtained
from GPS satellites (9) on a continuous basis, which is uploaded to the AutoLink
response center whenever a telephone link is established. The AutoLink service
representative can then dispatch roadside assistance or emergency response
services to the precise location of the vehicle or provide certain information
services (11). The AutoLink service representative (10) is also able to initiate
a call to the AutoLink product (1) via the switching center (5) without driver
involvement. This enables the service representative to perform services such as
unlocking doors and tracking stolen vehicles.


                                       58
<PAGE>   64

         Wireless Telephony. Cellular communication is the primary medium for
wireless voice communication currently in use in the United States. The cellular
infrastructure utilized by the Company is already in place. By contrast, the
Company's satellite, ESMR and personal communications services ("PCS")
competitors must expend substantial amounts of capital and several years of
development time to construct networks capable of transmitting and receiving
voice messages from customers nationwide.

         The Federal Communications Commission (the "FCC") has provided for a
two-operator duopoly in each cellular market. Only two licenses are awarded to
provide cellular service in any specific cellular MSA or RSA. One of the two
licenses in each market is initially awarded to a company or group that is
affiliated with a local landline telephone carrier in the market (the "Wireline"
or "B-Side" license) and the other license in each market is initially awarded
to a company, individual or group not affiliated with any landline telephone
carrier (the "Non-Wireline" or "A-Side" license). The HighwayMaster system
utilizes both the A-Side and B-Side carriers in its coverage areas, and has
agreements with both carriers in approximately 30% of its markets, allowing
system redundancy and greater flexibility. In addition to cellular licenses, the
FCC has issued up to six licenses in each market to PCS providers. At the
present time, PCS is generally available only in certain metropolitan markets
but is expected to create increased competition for cellular operators where
available.

         Increased demand for cellular service is driving investment in cellular
networks and improving service coverage. Cumulative capital investment within
the cellular industry has reached $32 billion as of December 1996, up from $6.3
billion in December 1990. Total number of cell sites increased to 30,045 in
December 1996 up from 10,307 in December 1992. Total cellular customers reached
more than 44.0 million in December 1996.

         Management believes that ordinary cellular subscribers utilizing
services outside of their home market will continue to be assessed roamer and
long-distance surcharges, although roaming rates are expected to decline.
Another shortcoming in current roamer usage of cellular services is that the
cellular industry has failed to provide an effective and universal incoming call
delivery system to subscribers on a nationwide basis. Current
autonomous-registration call delivery systems are generally available in urban
areas and are becoming more prevalent in rural markets. These shortcomings in
nationwide cellular coverage have been overcome in the HighwayMaster system,
because it offers nationwide call delivery in coverage areas which include
approximately 95% of the United States interstate highway system, and air time
rates that are free of roamer and variable long-distance surcharges.

         Management believes that due to the large number of existing cellular
subscribers, consumer ownership of many cellular telephones and the extensive
capital investment by cellular carriers in the existing cellular infrastructure,
it is unlikely that the existing cellular network will be abandoned or replaced
by ESMR or other competing technologies. A number of cellular carriers are in
the process of upgrading from existing analog cellular systems to enhanced
systems utilizing digital technology. However, management believes that the
large number of analog telephones already owned by cellular subscribers will
ensure that cellular telephone operators continue to offer services to existing
analog users concurrently with digital users, over an extended or indefinite
phase-in period that exceeds the expected useful life of the Series 5000 Mobile
Units.

         Enhanced Service Complexes. Call processing, data management and other
switching services for the Company's network are provided through the AT&T
Complex and the NSC. From 1993 through 1996, all such services were provided to
the Company and its customers through the AT&T Complex. AT&T terminated the AT&T
Contract effective as of June 29, 1996. In the third quarter of 1996, the
Company began commercial service with its own switching complex, the NSC, which
was designed and constructed for the Company by IEX. For new customers
commencing service after June 29, 1996, the NSC has fully replaced the AT&T
Complex. At the present time, AT&T continues to provide services through the
AT&T Complex without a formal contract with the Company. However, in September
1997, AT&T notified the Company that it would discontinue offering services
through the AT&T Complex as of December 31, 1997, and the Company intends to
begin servicing all of its customers through the NSC as of such date.


                                       59
<PAGE>   65

         Both the NSC and the AT&T Complex provide switching services among each
Series 5000 Mobile Unit, the HighwayMaster nationwide enhanced services network,
the dispatcher PC and the nationwide landline telephone network. Each switching
complex is capable of processing, storing and transmitting voice and data
transmissions. Voice communications are routed from each Series 5000 Mobile Unit
through the HighwayMaster nationwide enhanced services network to the
appropriate switching complex. The switching complex automatically completes the
call through the public telephone network to the end user. Voice communications
from the dispatcher or personal calls for the driver are routed through a
toll-free telephone number to the appropriate switching complex, which completes
the call through the appropriate wireless cellular system for the region in
which the truck is operating. Data packets from the host or a Series 5000 Mobile
Unit are stored in the switching complex, then transmitted in cost-effective
batches. Time critical information, as determined by the trucking company, is
immediately transmitted to the receiving party. The switching complex records
data from each transmission, generates a call record and processes the
information into customer billing records. HighwayMaster can increase capacity
of the NSC as needed to meet growing caller demands by increasing the line
capacity and number of modems and controllers.

         The Company believes that the NSC has certain advantages over the AT&T
Complex. This facility generally incorporates more advanced architecture and
offers additional functions not available through the AT&T Complex. In addition,
the NSC gives HighwayMaster increased flexibility to add new features and
services without having to negotiate contract modifications with AT&T and also
enhances the Company's ability to monitor operations and perform diagnostic
functions to identify problems.

         Call Routing. Each time a Series 5000 Mobile Unit travels into a new
MSA or RSA, it automatically registers with the cellular carrier under contract
with the Company. The cellular carrier routes the message to GTE-TSI or EDS,
which are also under contract with the Company and provides the switching
complex with call delivery information necessary for the switching complex to
deliver calls to the Series 5000 Mobile Unit as it travels through the new MSA
or RSA. Subsequent telephone calls or data transmissions originating from the
Series 5000 Mobile Unit are recognized by the local cellular carrier and
screened to allow call routing only through the switching complex, where
additional screening is conducted.

         Before a call originating from a Series 5000 Mobile Unit is received by
the switching complex, the Series 5000 Mobile Unit must establish an encoded
electronic "handshake" with the switching complex. The effective elimination of
roamer fraud is a factor in the Company's ability to contract with local
cellular carriers throughout the country.

         Navigation Technology. GPS allows users to identify the location of any
truck at any time via satellite. GPS is operated by the United States government
and broadcasts navigational information from a network of dedicated satellites
orbiting the earth. GPS navigational receivers interpret signals from multiple
satellites to determine the receiver's geographical coordinates, elevation and
velocity. GPS units available for civilian use are generally accurate within 100
yards. GPS navigational signals can be received worldwide, without adaptation of
the receiver unit to foreign standards. Management believes that the network of
GPS navigational satellites will be maintained by the United States Defense
Department in an operational status for the foreseeable future. Although
stand-alone GPS units are available for purchase by any consumer at relatively
low cost, raw navigational information is of little use to trucking companies
unless the GPS receiver is integrated with a computer system, such as the Series
5000 Mobile Unit, to record routes traveled relative to mapped roadways or to
transmit position reports to a central dispatcher.

         The Company's use of government-operated GPS satellites differs
substantially from competitors' use of satellites for two-way communications.
GPS satellites send one-way signals to mobile receivers, allowing the Series
5000 Mobile Unit to plot its geographical coordinates. GPS satellites are not
capable of two-way communication, and no charges are assessed to users of the
GPS services. For two-way mobile communications, the Company relies exclusively
on earth-based cellular systems. The Company's primary competitors utilize
leased or owned communications satellites for two-way data communications,
incurring costs associated with ownership or leasing of satellite communication
capacity.


                                       60
<PAGE>   66

STRATEGIC SERVICE ALLIANCES OF THE COMPANY

         Local Cellular Carriers. HighwayMaster has established a network for
United States-based trucking operators that offers mobile communication coverage
in 99% of the available cellular service areas in the United States (which
covers approximately 95% of the United States interstate highway system) and
100% of the A-Side coverage in Canada. The Company has agreements in place with
more than 70 cellular carriers, including all the regional Bell operating
companies, GTE, and Rogers Cantel, Inc., in more than 715 markets in the United
States and Canada. The Company has entered into contracts with both A-side and
B-side carriers in approximately 30% of United States cellular coverage regions.
Management expects its back-up coverage to continue to increase as more
relationships are established. Management believes that local cellular carriers
are motivated to make capacity available to the Company for various reasons,
including (i) increases in volume of air time usage, (ii) no customer service
expense, (iii) the inability of customers using the HighwayMaster system to
switch to another cellular carrier, (iv) no customer acquisition costs, (v)
access to a national customer base not otherwise available to local cellular
carriers, (vi) use of the HighwayMaster system by long-haul truckers who
typically travel through less dense cellular coverage areas, (vii) use of the
HighwayMaster system by truckers typically during off-peak time periods and
(viii) no expenses associated with fraudulent usage as a result of the security
protection afforded by the HighwayMaster system. Current terms of contracts
between the Company and each of its cellular carriers are generally for one
year, with automatic one-year successive renewal terms unless either party
elects to terminate the contract upon 30-days' notice prior to June 30 of each
year. The Company has recently executed new contracts with certain of its
cellular carriers that are substantially similar to the existing contracts
except that they provide for an initial three-year term. The Company's
agreements with cellular carriers provide that the Company will not be required
to reimburse carriers for fraudulent usage unless the carriers have fully
implemented the Company's protocol. Although the Company's protocol has been
effective to prevent fraud to date, there is no assurance that this will be the
case in the future.

         The Company's current contracts with cellular carriers permit the
Company to utilize their cellular networks to provide mobile communications
services to vehicles engaged in long-haul trucking and certain recreational uses
so long as such vehicles travel outside of their home areas for specified
periods of time. In order to begin offering the AutoLink service on a commercial
basis, it will be necessary for the Company to amend its contracts with cellular
carriers to allow the Company to utilize their cellular systems to provide
emergency and roadside assistance service to motorists in their home markets.
The Company has begun the process of amending its contracts with cellular
carriers, and to date has amended the contracts with more than 35 carriers.
However, there can be no assurance that it will be able to obtain amendments
covering all areas in which it currently provides mobile communications services
to long-haul trucks.

         GTE-TSI and EDS. GTE-TSI and EDS provide clearinghouse functions to the
cellular industry, creating the data link between a foreign network and a
roamer's home cellular service area, performing credit checking functions and
facilitating roamer incoming call delivery functions. The Company's contract
with GTE-TSI covers certain functions that are critical to the Company's ability
to instantly deliver calls nationwide. It covers an initial term of three years
ending March 14, 1998. The Company is guaranteed the right to renew the contract
for up to 10 one-year periods beyond the initial term, at a reasonable rate to
be determined by GTE-TSI. The agreement provides for mutual exclusivity by the
Company and GTE-TSI with respect to the provision and use of certain critical
call delivery features to provide service to the trucking industry. The
agreement between the Company and EDS involves the provision by EDS of certain
clearinghouse functions in connection with EDS' cellular carrier customers.
Fewer data processing functions are conducted by EDS due to the Company's
consolidation of certain common data processing functions with GTE-TSI. The
agreement with EDS expires on October 24, 1998 and is renewable for subsequent
one-year terms unless 60-days' notice is provided prior to the termination date
of the agreement. See "Risk Factors -- Dependence on Clearinghouse Services."

         AT&T. From 1993 to mid-1996, the Company and AT&T were parties to the
AT&T Contract pursuant to which they offered certain combined telecommunications
services to their joint customers in the long-haul trucking industry. Under the
AT&T Contract, AT&T agreed to provide certain enhanced call processing, data
management services and 


                                       61
<PAGE>   67

long-distance network transport to the joint customers of the Company and AT&T.
The call processing and data management functions performed by AT&T are housed
in the AT&T Complex, which was developed by AT&T specifically for this
application utilizing the Company's confidential trade secrets. The AT&T
Contract was scheduled to expire on June 29, 1998, unless terminated as of June
29, 1996 or June 29, 1997 at the option of AT&T upon 180 days' prior written
notice to the Company.

         In March 1996, the Company learned that AT&T intended to terminate its
exclusive agreement with HighwayMaster and offer use of the AT&T Complex and
confidential HighwayMaster trade secrets to one or more of the Company's
competitors. The Company has filed suit in Federal District Court against AT&T
seeking, among other things, preliminary and permanent injunctive relief
restraining AT&T from using and disclosing HighwayMaster's trade secrets and
proprietary information relating to its mobile communications technology, and
AT&T has sought similar relief claiming ownership of such trade secrets and
proprietary information. See "-- Legal Proceedings." On March 12, 1996, AT&T
notified the Company that it was terminating the AT&T contract as of June 29,
1996. At the present time, AT&T continues to provide services through the AT&T
Complex without a formal contract with the Company. However, in September 1997,
AT&T notified the Company that it would discontinue offering services through
the AT&T Complex as of December 31, 1997. See "Risk Factors -- Availability of
Switching Complexes."

         IEX Corp. IEX designed, tested, constructed and serves as facility
manager for the NSC. The NSC constitutes a critical link in providing certain
enhanced call processing, data management services and is necessary for the
Company to receive, store and route voice and data transmissions to and from its
customers. See "-- Infrastructure and Operations -- Configuration of the
HighwayMaster System," "-- Infrastructure and Operations -- Enhanced Service
Complexes."

         GTE Wireless. GTE Wireless indirectly provides a significant amount of
cellular coverage for the HighwayMaster network and pays all cellular carriers
for HighwayMaster, billing the Company on a monthly basis. The term of the
current agreement with GTE Wireless expires in March 1999.

         SBC. In connection with its strategic investment in the Company in
September 1996, SBC entered into a Technical Services Agreement with the Company
pursuant to which SBC or one or more of its affiliates will provide the Company
with certain technical and advisory services relating to the operation and
improvement of its network. The Company believes that the availability of these
services from SBC has the potential of allowing it to accelerate the development
and implementation of various features of its network and mobile communications
services.

ADDITIONAL BUSINESS OPPORTUNITIES

Burlington Contract

         In 1997, HighwayMaster entered into an agreement with Burlington, one
of the largest truckload carriers and logistics providers in North America,
which provides for the installation of up to 2,000 Series 5000 Mobile Units in
Burlington's fleet of long-haul trucks. As part of the transaction, the Company
purchased exclusive ownership rights to Burlington's proprietary fleet operating
and management information software and has assumed the operation of its data
center and computer systems. HighwayMaster intends to add capacity to the
Burlington data center in order to provide a broad range of data processing
services to other trucking companies which would essentially replace such
companies' existing management information systems departments with services,
software and hardware to be provided by HighwayMaster. Added capacity would
enable HighwayMaster to use the Burlington software and data center in
conjunction with the HighwayMaster mobile communications system to offer its
customers levels of integration not previously available in the trucking
industry. HighwayMaster is not currently providing these services, and there can
be no assurance that it will be successful in marketing its information
management solutions to other trucking companies.


                                       62
<PAGE>   68

Other Opportunities

         The Company believes that substantial expansion opportunities exist
within international markets that are served by cellular service. The Company
currently provides certain mobile communications services to Canadian-based
operators who provide a remote call forwarding line (also known as a foreign
exchange line) from their dispatcher PC to the United States. The Company's
ability to provide such services to owner-operators and operators of small
fleets in Canada is limited given that they cannot easily afford the expense of
a remote call forwarding line. There are approximately 200,000 larger-size
trucks operating in Canada, many of which travel extensively in the United
States. Mexico offers another avenue for expansion if agreements with cellular
carriers and installation of necessary infrastructure interfaces can be
established. According to one industry source, in 1993, there were approximately
250,000 medium and larger sized trucks and buses operating in Mexico. Management
believes that expansion into Europe may prove to be viable for the Company
because trucking companies in Europe face many of the same demands as companies
in the United States and the European cellular infrastructure is highly
developed. However, engineering changes would be necessary to build a
HighwayMaster system adapted to European cellular technology and multiple
languages. A data-only satellite-based competitor of the Company currently is
operating in Europe, Japan and certain other developed countries.

         The most recent Truck Inventory and Use Survey published by the United
States Census Bureau indicated that in 1992 there were 2.6 million medium and
heavy commercial trucks in the United States. Future refinements, which may
eventually provide city street map detail, should allow the HighwayMaster system
to be used by intra-city courier services, local bus companies and police, fire
and ambulance services. In addition to these software enhancements, it will be
necessary for the Company to revise its working relationships with the affected
local cellular carriers before the Company attempts to expand its customer base
to include localized intra-city users and to provide certain changes to its
Company Complex to service a more localized market. See "-- Infrastructure and
Operations -- Enhanced Service Complexes".

         In addition, the Company is developing and intends to market additional
wireless voice and data solutions, network services, logistics software and
wireless computer communications devices to other freight and field service
operations on a local and national basis (some of which may require
modifications to equipment and existing contracts with cellular carriers and
other parties). Management has identified several potential markets, some of
which would require modification to the Series 5000 Mobile Unit or HighwayMaster
system's infrastructure. For example, management believes the Company could
develop an additional market opportunity in the tracking and dispatching of
commercial trailers, which numbered 2.4 million in the United States in 1992.
Trailers would not require two-way voice communication, so a lower cost version
of the Series 5000 Mobile Unit could be developed.

         Management also believes interstate bus companies could benefit from
the HighwayMaster system in its present configuration in order to contact
drivers to bypass small town bus stops with no passengers for pickup. The
Company also intends to market the HighwayMaster system to railroads for use in
locomotives and railcars. In addition, management believes that the more than 2
million recreational vehicles in the United States constitute a potential market
for the Company's services.

COMPETITION

         In each of the markets currently targeted by the Company, there are a
number of other companies that offer or plan to offer some form of two-way
mobile communication using a variety of different technologies which compete or
could eventually be used to compete with the Company. These companies primarily
utilize satellite-based communications technologies, SMR, enhanced specialized
mobile radio (ESMR), and wireless technologies, including paging systems and
terrestrial links for dedicated short range communications systems.

         Conventional Satellite Communications. Satellite communication is
accomplished through transmission of a signal from an earth-based transmitter to
a satellite, which automatically retransmits the signal to an earth-based
receiver. 


                                       63
<PAGE>   69

Many communication satellites are geo-stationary, and remain over a single point
over the equator by orbiting the earth in the same direction and at the same
speed as the rotation of the earth. Mobile equipment designed for satellite
communication is equipped with highly specialized rotating antennae which are
continuously directed toward the satellite, and utilize highly complex data or
voice compression systems to minimize demands on satellite capacity. This type
of mobile communication equipment broadcasts over the radio frequency spectrum,
and domestically the FCC regulates and controls the number of satellite
communications systems that may be placed in service.

         Satellite communication available to the transportation industry
generally utilizes a single earth station to transmit and receive data via
satellite to and from satellite communication units installed in trucks.
Messages created by truck drivers on an onboard keyboard can be stored,
compressed and transmitted in short bursts. Although voice communication is
theoretically possible for mobile communication systems that utilize satellite
transmissions, the current limited capacity and current high cost of satellite
communication have tended to limit offerings to data-only services.

         Satellite systems currently cover 100% of the continental United
States, and their comprehensive coverage may be perceived by truckers and
trucking companies as an advantage over the cellular system. The Company
believes that any marketing or operational advantage derived from satellite
coverage, as compared to the HighwayMaster system (which covers approximately
95% of the United States interstate highway system), is mitigated by the fact
that satellite systems require more costly equipment and do not currently offer
voice communication on an economical basis and by the fact that users of the
satellite system can experience queuing delays during peak periods between
transmission and receipt of messages. In addition, because geo-stationary
satellites stay over the equator, transmission and receipt of data in North
America is sometimes interrupted or rendered impossible by obstacles on the
southern horizon, such as nearby tall buildings or mountains.

         At the present time, the Company's primary satellite competitor in the
long-haul trucking market is Qualcomm, which markets its products and services
primarily to large fleets, offers two international satellite-based
communication systems: (i) OmniTRACS, which provides two-way data messaging and
tracking services, and (ii) TrailerTRACS, which provides trailer monitoring.
Drivers access and utilize the system through an onboard keyboard and data
display screen. Qualcomm offers or plans to offer its products and services in
certain of the international markets targeted by the Company, including Canada,
Mexico and Europe. Qualcomm reported that as of January 1997 it had delivered
over 200,000 OmniTRACS systems worldwide. The Company believes that the
satellite- based communication products and services offered by Qualcomm are
generally more expensive than the Company's products and services. However,
Qualcomm has recently offered lower prices for quantity purchases and
reduced-cost trial periods in an effort to improve its competitiveness.

         At least one other entity offers or plans to offer satellite-based data
communication and tracking services to the long-haul trucking industry. AMSC, a
geo-stationary system which is owned by a consortium of satellite and
communications companies offers a satellite-based system that is similar to the
Qualcomm system in that the mobile communications equipment consists of a
keyboard and data screen mounted in each truck. Recent enhancements allow dual
SMR or satellite communication in a single unit. The AMSC system offers both
voice and data communications.

         Middle and Low Earth Orbit Satellites. In order to maintain a
stationary position over the earth, communication satellites currently in use
must maintain a very high orbit, which requires earth stations to generate
relatively high powered transmissions for communication with the satellite.
Certain entities, including Qualcomm, are participating in the development of
MEO and LEO satellite networks, which are designed to employ multiple satellites
in relatively lower earth orbits, rapidly circling the earth. The lower earth
orbits should facilitate both voice and data communication services and will be
accessible through relatively lower powered transmitters and receivers, allowing
them to be installed in portable communication equipment. In terms of product
and service offerings, MEO and LEO systems can be expected to compete directly
with cellular services, including the HighwayMaster products and services, and
will offer coverage in remote areas and foreign countries currently unserved by
cellular carriers. However, due to the substantial 


                                       64
<PAGE>   70

capital investment required to place these systems in service, the Company
believes that the MEO and LEO- based voice call rates are expected to be higher
than the $0.53 per minute rate charged to HighwayMaster's customers.

         Specialized Mobile Radio. SMR has traditionally been used to serve the
needs of local dispatch services such as taxis and couriers, which typically
broadcast short messages to a large number of units. SMR wireless communication
systems rely on high-powered voice or data transmissions among widely-spaced
receiver/ transmitter sites within a discrete local or regional area. These
systems generally have lower capacity to support simultaneous transmissions in a
given area than do cellular systems, which transmit and receive radio
communications from numerous closely- spaced cell sites. The radio hardware
currently used to operate the various SMR systems varies widely, making it
impossible for a customer to "roam" into a neighboring region that is served by
a carrier with a different hardware configuration.

         Enhanced Specialized Mobile Radio. ESMR operators are currently
developing and implementing ESMR digital technology to offer relatively low-cost
mobile telephone services, with construction expected to be completed in several
years. One operator, Nextel, Inc., is developing a nationwide digital ESMR
network to provide mobile telephone service and has begun providing service in
dozens of major metropolitan areas. Nextel is developing its ESMR network using
uniform standards and a coordinated infrastructure to provide mobile telephone
services with no roaming charges anywhere in the U.S. Other local and regional
ESMR operators in addition to Nextel may eventually be able to offer
region-to-region calling and call delivery services which will compete with the
Company's services.

         Paging Services. At considerably less cost than full two-way mobile
communication, several long-haul truckers and fleet operators have purchased or
leased paging systems that allow a dispatcher to send a message to a driver.
Management believes that pagers are used by trucking companies as a "temporary
fix," since pagers do not offer full-function two-way communications services
and cannot track vehicle locations. Some paging companies have begun to offer
limited time- delayed two-way messaging capabilities, although initial
shortcomings in coverage, voice service and tracking capabilities are likely to
limit their use in the long-haul trucking market.

         Other Services. Other services are being proposed that could
potentially compete with the HighwayMaster system. For example, the FCC
currently is considering whether to allocate 75 megahertz of spectrum in the
5.850-5.925 GHz band to establish DSRC systems for the deployment of intelligent
transportation systems to provide terrestrial wireless communication links
between vehicles traveling at highway speeds and roadside systems. Current
DSRC-based services include en- route driver information, freight mobility
tracking, traffic control and automated roadside safety inspection. If these
services can be provided inexpensively, they may compete with the Company's
services.

         Telecommunications Act of 1996. The Telecommunications Act is intended
to increase competition in virtually every arena of communications and eliminate
many regulatory barriers to new competitors. It is unknown at this time what
effect this legislation will have on the Company's ability to compete in the
marketplace. See "Risk Factors -- Uncertainty of Government Regulation."

PATENTS AND PROPRIETARY TECHNOLOGY

         The Company has obtained ten domestic patents and has applied for
additional domestic and foreign patents. In general, the Company's existing
patents relate to certain features and capabilities of the HighwayMaster used in
locating and communicating with vehicles through the cellular infrastructure.
The Company's software is also entitled to certain protections under state trade
secret law and federal copyright law. See "Risk Factors -- Uncertainty Regarding
Patents and Proprietary Rights."

REGULATION

         The Company's products and services are subject to various regulations
promulgated by the FCC which apply to the wireless communications industry
generally. The Company's Series 5000 Mobile Units must meet certain radio
frequency emission standards and not cause unallowable interference to other
services. The Company has relied on the 


                                       65
<PAGE>   71

manufacturer of the cellular transceiver component of the Series 5000 Mobile
Units, which is currently Motorola, to carry out appropriate testing and
regulatory compliance procedures regarding the radio emissions of the cellular
transceiver component.

         The FCC also controls several other aspects of the wireless industry
that affect the Company's ability to provide services. The FCC controls the
amount of radio spectrum available to cellular carriers, which could eventually
limit growth in cellular carrier capacity. Management expects the FCC to expand
capacity available to the cellular industry as it becomes necessary in order to
maintain current levels of service, although there is no assurance that such
expansion will occur.

         The Company believes that the nature of its services does not require
the Company to be classified as a common carrier for either wireless or
long-distance regulatory purposes. This conclusion is based on several
alternative regulatory interpretations, including the classification of the
HighwayMaster service as a private network whose service is not offered to the
public at large, but rather targeted to specific users such as the long-haul
trucking industry and other owners of commercial vehicles. In addition, each
customer arrangement is tailored to fit the communication needs of that
particular customer. Alternatively, the Company can be classified as an enhanced
services provider, and thus not subject to common carrier regulation, because
the HighwayMaster proprietary hardware and software processing applications act
on information transmitted by subscribers, who then receive information in
return from HighwayMaster regarding the status of their commercial vehicles. The
Company relies on its long-distance provider to comply with any long-distance
regulatory requirements.

         The wireless telecommunications industry currently is experiencing
significant regulatory changes which may require a re-examination of laws and
regulations applicable to the Company's operations. For example, both the
present HighwayMaster service and the future AutoLink service may be considered
to be CMRS. CMRS providers are treated as common carriers, except that the FCC
has decided to forbear from most common carrier regulation of the CMRS
marketplace, including regulation of the rates and terms of entry for interstate
services offered by CMRS providers. In addition, Congress has preempted state
regulation of CMRS entry and rates. Recent FCC decisions have enhanced the
development of CMRS, including requiring local telephone companies to offer
interconnection and access to their networks to CMRS providers and to establish
reciprocal compensation arrangements with CMRS providers for the transportation
and termination of calls at prices that are cost-based and just and reasonable.
To the extent that services offered by the Company are determined to be
telecommunications services (which would not include enhanced services offered
by the Company), the Company would be required to contribute to the mechanisms
established by the FCC and various states to preserve and advance universal
service. At the federal level, the Company's universal service contribution
would be based on the end-user telecommunications revenues generated by those
services that are determined to be telecommunications services. The Company
cannot predict the impact of any requirement to contribute to state and federal
universal service mechanisms.

         The Company's regulatory status also may change as a result of offering
the AutoLink service, which will be offered indiscriminately to the public at
large, with no individualized or customized contracts, and thus may be
considered a common carrier service. However, the Company believes that it will
nonetheless be regulated as a private carrier if, as currently contemplated, the
AutoLink service does not offer interconnection to the public switched network.
If the Company's interpretation of its regulatory status proves to be incorrect
and it is deemed to be a common carrier, the Company may be required to offer
its services upon reasonable request from any member of the public, it may be
required to offer its services on a basis that is not unreasonably
discriminatory, and, in certain states that regulate common carriers, it must
comply with various regulatory requirements established by state public utility
commissions, or their governing statutes, including procedures related to
customer deposits, the filing of registration or notification letters, and the
filing of tariffs. Changes in regulation of cellular common carriers also may
require equal access by customers to the long-distance provider of their choice.
Although regulations applicable to common carriers would add certain
administrative costs and possible complications to the Company's relationships
with its long-distance provider and cellular carriers, the Company believes that
common carrier status would not require the Company to make substantial changes
to its current services. Finally, certain public utility commissions could take
the position that 


                                       66
<PAGE>   72

approval would be needed prior to any transfer of control of the Company. There
can be no assurance that compliance with such regulations would not have a
material adverse effect on the Company's operations.

         Long-distance providers face regulatory schemes similar to cellular
carriers, with greater state involvement in requiring posting of bonds as
security against customer deposits and in other matters. The Company believes
current long-distance regulations apply to the companies providing long-distance
services directly to Company customers, without long-distance regulatory
involvement by the Company.

         The Company currently provides mobile communications services to
Canadian-based operators only if such operators provide a remote call forwarding
line (also known as a foreign exchange line) from their dispatcher PC to the
United States. This limits the Company's ability to provide such services in
Canada, especially to owner-operators and operators of small fleets that cannot
easily afford the expense of a remote call forwarding line. There can be no
assurance that the Company will be able to resolve the issues required to permit
it to expand the scope of its Canadian operations, including the provision of
the AutoLink service.

EMPLOYEES

         As of December 31, 1996 the Company employed approximately 295
individuals, of whom 47 are engaged in engineering and product development, 119
in customer service, 59 in sales and marketing and 70 in administrative or
executive functions. None of the Company's employees are represented by a labor
union and management considers its relationship with its employees to be
generally good.

PROPERTIES

         The Company does not own any real property. The Company leases
approximately 55,687 square feet of office space for its corporate headquarters
in Dallas, Texas, at an average price of $14.70 per square foot per year,
pursuant to a short-term lease agreement. The Company leases a small amount of
commercial office space for each of its five regional customer service offices,
including the Dallas regional customer service office.

LEGAL PROCEEDINGS

         AT&T Litigation. On February 16, 1996, the Company filed a lawsuit
against AT&T in the U.S. District Court, Northern District of Texas, Dallas
Division. The Company is seeking preliminary and permanent injunctive relief
restraining AT&T from using and disclosing the Company's trade secrets and
proprietary information relating to its mobile communications technology. In
July 1996, AT&T filed counterclaims essentially mirroring the Company's claims.
Both the Company and AT&T claim ownership of trade secrets and proprietary
information related to the design and function of the Company's mobile
communications unit and dispatcher software and certain methods developed to
prevent fraudulent use of the system.

         In September and October 1996, both the Company and AT&T amended their
pleadings and filed additional claims against each other related to breach of
contract and various tortious activities. AT&T seeks an injunction preventing
the Company from using or disclosing AT&T's alleged trade secrets, a declaratory
judgment defining the parties' intellectual property rights, actual and punitive
damages and attorneys' fees in connection with its counterclaims. The Company
seeks a declaration that the patents issued to AT&T using the Company's
proprietary information are invalid or, alternatively, should be transferred
from AT&T to the Company, and that certain actual or threatened AT&T conduct
infringes the Company's patents. The Company also brought claims against AT&T
pursuant to the Texas DTPA and seeks actual, punitive and treble damages and
attorneys' fees in connection with its claims. Additionally, the Company's
amended complaint added another defendant, Lucent, to which AT&T transferred
certain of the patents at issue in the lawsuit. Both the Company and AT&T seek
substantial monetary damages.


                                       67
<PAGE>   73

         In November 1996, AT&T filed a partial motion to dismiss the Company's
DTPA claims, various tort claims and the patent invalidity charges.
Additionally, in November 1996, Lucent filed a motion to dismiss all of the
Company's claims against Lucent. In December 1996, the Company filed a response
to AT&T's partial motion to dismiss and a response to Lucent's motion to
dismiss. Supplemental briefing on the motions is anticipated and a decision is
expected in the near future.

         Other. The Company is also involved in various other claims and
lawsuits incidental to its business, including claims and lawsuits alleging
breaches of warranty, product defects in certain Series 5000 Mobile Units or
breaches of contractual obligations under service agreements with customers
using the HighwayMaster system. Such claims include claims by a former
significant customer that terminated its agreement with the Company resulting in
a $1,000,000 charge to reduce the carrying value of the amount of a receivable
due from such customer and pending litigation in which the Company and such
former customer have each asserted claims for damages against the other in
connection therewith. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations -- General." The Company does not believe
that these claims and lawsuits will have a material adverse affect on the
Company's business, financial condition and results of operations.


                                       68
<PAGE>   74

                                   MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

         The following table sets forth certain information regarding the
directors and executive officers of the Company.


<TABLE>
<CAPTION>
NAME                        AGE          POSITION
- ----                        ---          --------
<S>                         <C>          <C>                    
William C. Kennedy, Jr.      57          Chairman of the Board
William C. Saunders          50          President, Chief Executive Officer and Director
Stephen L. Greaves           38          Director
Terry S. Parker              52          Director
Gerry C. Quinn               48          Director
Gordon D. Quick              49          Executive Vice President and Chief Operating
                                         Officer
J. Philip McCormick          55          Executive Vice President and Chief Financial
                                         Officer
G. Tracy Griffin             52          Treasurer and Senior Vice President of
                                         HighwayMaster
                                         Corporation
William H. McCausland        36          Senior Vice President, Network Operations
Brad E. Popoff               43          Senior Vice President, Customer Service
                                         Operations
Thomas D. Russell            38          Senior Vice President, Strategic Business
                                         Development
Wesley E. Schlenker          35          General Counsel and Secretary
Stephen P. Tacke             50          Vice President and Controller
Kenneth R. Westerlage        36          Senior Vice President, Engineering & Technology
                                         Development
Jeffrey G. Wisocki           41          Senior Vice President, Customer Development
</TABLE>

         Set forth below are descriptions of the backgrounds and principal
occupations of each of the Company's executive officers and directors.

         WILLIAM C. KENNEDY, JR., age 57, has served as Chairman of the Board of
Directors of the Company since its inception in 1992, and as Chief Executive
Officer of the Company from its inception until December 1994. Mr. Kennedy
founded Instacom, Inc., serving as its Chairman and President from 1970 until
its merger with Comdata Network, Inc. in 1983. Instacom and Comdata provide
computerized money transfer services for trucking companies and their drivers.
Mr. Kennedy served as the Chairman of Comdata Network, Inc. from 1983 to 1985.
He also served as the Chairman, President and Chief Executive Officer of By-Word
from 1988 to 1994, a company which was engaged in the engineering and
development of voice recognition and communication products until it became a
partner in the predecessor partnership to the Company in 1992. By-Word was
dissolved in 1994. Mr. Kennedy has served as a Director of Pittencrieff
Communications, Inc., a specialized mobile radio provider, since 1993.

         WILLIAM C. SAUNDERS, age 50, has served as President and a Director of
the Company since its inception in 1992, and as Chief Executive Officer since
December 1994. Mr. Saunders served for more than 20 years as President and
Chairman of the Board of Saunders, Lubinski & White, Inc., an advertising and
marketing firm, where his background included significant experience in
advertising and marketing targeted at the trucking industry. Mr. Saunders
provided advertising and marketing services to Instacom and Comdata in the 1970s
and 1980s. From 1991 to 1994, Mr. Saunders served as a Director of By-Word.

         STEPHEN L. GREAVES, age 38, has served as a Director of the Company
since June 1994. He has served as President of Erin Mills International
Investment Corporation, a private venture capital fund and a stockholder of the
Company, since February 1997 and General Manager from April 


                                       69
<PAGE>   75

1993 to February 1997. From January 1992 until April 1993, Mr. Greaves worked as
a private marketing consultant. From January 1989 to December 1991, Mr. Greaves
served as Marketing Planner for Esso Standard Petroleum Oil.

         TERRY S. PARKER, age 52, has served as a Director of the Company since
April 1995. Mr. Parker served as President and Chief Operating Officer of
CellStar Corporation, a cellular distributor, from March 1995 to July 1996. From
October 1993 until March 1995, Mr. Parker served as President of GTE Mobile
Comm, a cellular service provider. From January 1989 until October 1993, Mr.
Parker served as President of GTE-TP&S, a telecommunications company. Mr. Parker
also serves as a Director of Equalnet Corporation.

         GERRY C. QUINN, age 48, has served as a Director of the Company
(including its former affiliates, Eighteen Wheeler Corporation and The F.B.R.
Eighteen Corporation) since its inception in 1992, and served as President of
The Eighteen Wheeler Corporation and The F.B.R. Eighteen Corporation from April
1992 until February 1994. Mr. Quinn has served as President of The Erin Mills
Investment Corporation, a private venture capital fund and stockholder of the
Company, since July 1989, and as Executive Vice President of The Erin Mills
Development Corporation, a private venture capital fund and a stockholder of the
Company, since September 1989.

         GORDON D. QUICK, age 49, has served as Executive Vice President and
Chief Operating Officer of the Company since January 1995. Prior to joining the
Company, Mr. Quick served for more than 20 years in various positions with GTE
Corporation ("GTE"), where, among other things, he held a variety of marketing,
planning and general management positions with the Telephone Operations Group
and the Information Services Group. In 1990, he was named Vice President of
Marketing and Business Development, and in January 1992 he was named Vice
President and General Manager of GTE-TSI, a principal business unit of GTE. Mr.
Quick was involved in developing the initial services provided to the Company
under contract with GTE-TSI.

         J. PHILIP MCCORMICK, age 55, joined the Company in August 1997 as
Executive Vice President and Chief Financial Officer. Prior to joining the
Company, Mr. McCormick was a senior officer with units of ENSERCH Corporation
from 1991 to 1997, most recently senior vice president and chief financial
officer of Enserch Exploration, Inc. from 1995 to 1997. Prior to joining ENSERCH
Corporation he practiced public accounting for 26 years and was a partner of
KPMG Peat Marwick and KMG Main Hurdman, serving in management positions and on
the Boards of each firm.

         G. TRACY GRIFFIN, age 52, has served as Treasurer of the Company since
June 1992 and was named Senior Vice President of HMC, the Company's operating
subsidiary, in January 1995. From 1982 until June 1992, Mr. Griffin served as
Controller and Vice President of Saunders, Lubinski & White, an advertising and
marketing company with expertise in the trucking industry and a former affiliate
of the Company. Mr. Griffin is the first cousin of Mr. Saunders.

         WILLIAM H. MCCAUSLAND, age 36, has served as Senior Vice President,
Network Operations since September 1996. Mr. McCausland served the Company as
Vice President, Business Alliances from January 1996 to September 1996. From May
1993 to January 1996, Mr. McCausland was employed by GTE-TSI initially as
Director of Industry Relations and was an Assistant Vice President and General
Manager when he left to join the Company. Prior to his employment at GTE-TSI,
Mr. McCausland worked for CommNet Cellular, Inc. (formerly known as Cellular,
Inc.) from May 1987 to May 1993, where he was employed in a variety of positions
with his most recent being that of Vice President of Customer Support Services.
From May 1984 to May 1987, Mr. McCausland worked in a variety of management
positions for a cellular reseller acquired by Southwestern Bell Mobile Systems.

         BRAD E. POPOFF, age 43, has served as Senior Vice President, Customer
Service Operations since September 1996. Mr. Popoff served the Company as Senior
Vice President, Marketing from November 1993 to September 1996, as Vice
President, Operations and Engineering from December 1992 until November 1993, as
Vice President, Operations, from September 1992 until December 1992, and as
Director of Marketing from April 1992 until September 1992. From 1986 until
April 1992, Mr. Popoff was employed as Vice President of Sales and Marketing of
Burlington, a trucking company, where he was responsible for the 22 western
states in the United States and Mexico. Mr. Popoff 


                                       70
<PAGE>   76

held various operations, sales and sales management positions with Schneider
National, Inc. ("Schneider"), a trucking company, from 1980 until 1986, and
served as Manager of Operations of Mead Paper Corporation's private fleet, where
he was employed from 1974 until 1980.

         THOMAS D. RUSSELL, age 38, has served as Senior Vice President,
Strategic Business Development since September 1996. Mr. Russell served the
Company as Senior Vice President, Engineering and Information Technology from
November 1993 to September 1996. Mr. Russell has over 12 years of experience in
engineering and information technology. From June 1990 to November 1993, Mr.
Russell served as Director in the areas of Asia Logistics and Systems Planning
and Development for Sea Land Service, Inc., a global steamship and container
service company. From September 1985 through June 1990, Mr. Russell served in
various capacities, including Director, Marketing and Telecommunications,
Manager of Management Services and as Quantitative Business Analyst for
Burlington. Prior to his employment at Burlington, Mr. Russell also served as
Management Analyst at the University of Missouri and Application Engineer at
National Supply Company.

         WESLEY E. SCHLENKER, age 35, has served as General Counsel of the
Company since June 1994 and as Secretary of the Company since April 1995. Mr.
Schlenker was an associate attorney in the Dallas, Texas and Brussels, Belgium
offices of Akin, Gump, Strauss, Hauer & Feld, L.L.P. between March 1991 and June
1994. Prior to his formal legal training, Mr. Schlenker was employed by
Electronic Data Systems Corporation as a Systems Engineer, primarily developing
systems for Saturn Corporation.

         STEPHEN P. TACKE, age 50, has served as Vice President and Controller
of the Company since August 1995. From August 1996 to August 1997, Mr. Tacke
also served as acting Chief Financial Officer of the Company. From July 1991
through August 1995, Mr. Tacke performed financial consulting services and
managed his personal investments. Prior to July 1991, Mr. Tacke was employed by
Price Waterhouse for 22 years, last serving as an audit partner.

         KENNETH R. WESTERLAGE, age 36, has served as Senior Vice President,
Engineering & Technology Development of the Company since September 1996. Mr.
Westerlage served the Company as Vice President of Software Development from
November 1995 to September 1996 and as Director of Software Development from
September 1991 to November 1995. Prior to Mr. Westerlage's employment at the
Company, he was employed for over eight years in the aerospace industry at
General Dynamics working in a variety of systems design and development
capacities.

         JEFFREY G. WISOCKI, age 41, has served as Senior Vice President,
Customer Development since September 1996. Mr. Wisocki served the Company as
Senior Vice President, Operations/Customer Service from November 1993 to
September 1996. Mr. Wisocki has 15 years experience in various positions in the
trucking industry. Mr. Wisocki was employed by Burlington or its affiliates from
April 1987 to November 1993, serving in several capacities, including Vice
President of Customer Service and Senior Vice President, Operations of
Burlington. Mr. Wisocki held various management positions with Schneider from
1982 to 1987.

         Except as described above, there are no family relationships among the
directors and executive officers of the Company.

ORGANIZATION OF THE BOARD OF DIRECTORS AND MEETINGS

         General. The entire Board of Directors is currently comprised of five
directors, four of whom are employees of the Company or representatives of
certain of the principal beneficial owners of Common Stock of the Company. See
"Security Ownership" and "Certain Relationships and Related Party Transactions
- -- Amended Stockholders' Agreement -- Election of Directors." All directors
serve until the next annual meeting of the stockholders or until their
respective successors are duly elected and qualified.

         During the fiscal year ended December 31, 1996, the Board of Directors
held eight meetings. The standing committees of the Board consist of a
Compensation Committee, an Audit Committee and an Executive Committee.


                                       71
<PAGE>   77

         The Compensation Committee has been delegated the task of the
administration of, and the determination of strategy and policy matters related
to, the Amended and Restated 1994 Stock Option Plan (the "Stock Option Plan")
and is composed of William C. Saunders, Gerry C. Quinn, Terry S. Parker and
Stephen L. Greaves. The Compensation Committee met one time during the 1996
fiscal year. A subcommittee of the Compensation Committee, composed of Stephen
Greaves and Gerry Quinn, was formed to make awards under the Stock Option Plan
and to review the future compensation of Terry S. Parker, William C. Kennedy,
Jr. and William C. Saunders. Neither of the subcommittee members is an officer
or employee of the Company or holds options granted under the Company's Stock
Option Plan.

         The Audit Committee meets with management and the Company's independent
accountants to determine the adequacy of internal controls and other financial
reporting matters. The Audit Committee, composed of William C. Kennedy, Jr.,
Terry S. Parker and Gerry C. Quinn, met two times during the 1996 fiscal year.

         The Executive Committee provides certain oversight and review functions
not practical in a larger, more formal Board setting. The Executive Committee,
composed of Gerry C. Quinn and Terry S. Parker, held no meetings during the 1996
fiscal year.

         During the fiscal year ended December 31, 1996, each Board member
attended at least 75% of the aggregate of the meetings of the Board and of the
committees on which he served.

         Indemnification. The Company's Certificate of Incorporation and Bylaws
require the Company to indemnify each person who is or was a director, officer,
employee or agent of the Company, or is or was serving at the Company's request
as a director, officer, employee or agent of another corporation, partnership,
joint venture, trust or other enterprise against expenses, judgments, fines and
amounts incurred in such capacity if such person acted in good faith and in a
manner he or she reasonably believed to be in or not opposed to the best
interests of the Company or, with respect to criminal proceedings, not unlawful.
The Company will also advance to such persons payments incurred in defending a
proceeding to which indemnification might apply provided the recipient provides
an undertaking agreeing to repay all such advanced amounts if it is ultimately
determined that such person is not entitled to be indemnified. In addition, the
Bylaws specifically provide that the indemnification rights granted thereunder
are nonexclusive. In accordance with the Bylaws and the Amended Stockholders'
Agreement (as defined below), the Company has purchased insurance on behalf of
its directors and officers in amounts it believes to be reasonable.

COMPENSATION OF DIRECTORS

         Pursuant to the Bylaws of the Company, the Board of Directors has the
authority to fix the compensation of directors. The Bylaws and the Amended
Stockholders' Agreement provide that directors may be reimbursed for their
reasonable expenses, if any, for their services to the Company, including
attendance at each Board meeting, and may be paid either a fixed sum for
attendance at each Board meeting or a stated salary as director. The Company
currently reimburses its Board members for travel expenses. Additionally, during
part of 1996, the Company compensated Terry Parker in an amount of $1,000 for
each meeting attended. However, the Company currently does not pay a fee for
attendance at meetings of the Board of Directors. In addition, the Company has
granted him an option to purchase 3,798 shares of Common Stock at an exercise
price of $7.58 per share. This option was not granted pursuant to the Company's
Stock Option Plan.

         In addition to his services as a director, Mr. Parker performs
consulting services for the Company in connection with the AutoLink venture and
related cellular communications matters. Pursuant to this consulting
arrangement, Mr. Parker received $41,666.65 in fees during 1996. Mr. Parker will
receive approximately $20,833 per month in fees during 1997 for continuing
consulting services he is providing to the Company.


                                       72
<PAGE>   78


COMPENSATION OF CERTAIN EXECUTIVE OFFICERS

         General. The following table sets forth, for each of the last three
fiscal years, compensation awarded, paid to or earned by the Company's Chief
Executive Officer and its other four most highly compensated executive officers
(the "Named Executive Officers").

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                                 LONG TERM
                                                                                COMPENSATION
                                                   ANNUAL COMPENSATION(2)          AWARDS   
                                                 --------------------------     ------------
                                                                                 SECURITIES
                                                                                 UNDERLYING
         NAME AND                                                                 OPTIONS/        ALL OTHER
   PRINCIPAL POSITION(1)                YEAR        SALARY         BONUS        SARS (SHARES)    COMPENSATION
- ---------------------------            -----     ------------   ------------    -------------    ------------
<S>                                      <C>      <C>             <C>              <C>          <C>
William C. Kennedy, Jr.(3)  . . . . . .  1996     $399,300.00     $       0              0      $         0
  Chairman of the Board                  1995     $363,000.00     $       0              0      $         0
                                         1994     $341,250.00     $       0        593,478      $         0
William C. Saunders(3)  . . . . . . . .  1996     $399,300.00     $       0              0      $         0
  President and Chief Executive          1995     $363,000.00     $       0              0      $         0
  Officer                                1994     $341,250.00     $       0        593,478      $         0
Gordon D. Quick(3)  . . . . . . . . . .  1996     $301,354.25     $       0         40,000      $         0
  Executive Vice President and           1995     $263,541.82     $6,400.00              0      $148,378.00(4)
  Chief Operating Officer                1994             --            --         141,305              --
Jeffrey G. Wisocki  . . . . . . . . . .  1996     $119,166.78     $       0         10,000      $         0
  Senior Vice President,                 1995     $107,500.08     $       0              0      $         0
  Customer Development                   1994     $104,166.75     $       0         56,974      $         0
Brad E. Popoff  . . . . . . . . . . . .  1996     $118,333.44     $       0         10,000      $         0
  Senior Vice President,                 1995     $105,000.00     $       0              0      $         0
  Customer Service Operations            1994     $109,375.00     $       0         56,974      $         0
</TABLE>                                                                   

___________

(1)      Certain Named Executive Officers included in this table are employees
         of the Company's operating subsidiary, HMC.

(2)      The Named Executive Officers did not receive any annual compensation
         not properly categorized as salary or bonus, except for certain
         perquisites and other personal benefits which are not shown because
         the aggregate amount of such compensation, if any, for each of the
         Named Executive Officers during the fiscal year did not exceed the
         lesser of $50,000 or 10% of his total reported salary and bonus.

(3)      For information regarding the annual base salaries and bonuses
         received by certain Named Executive Officers pursuant to employment
         contracts with the Company, see "-- Employment Contracts with
         Executive Officers."

(4)      Represents relocation expenses, including $43,684 paid to Mr. Quick
         related to taxes on moving expenses paid on his behalf by the Company.

         Stock Options. The Company grants options to certain of its executive
officers under the Stock Option Plan. As of December 31, 1996, options to
purchase a total of 2,043,298 shares had been granted and were outstanding
under the Stock Option Plan and options to purchase 296,217 shares remained
available for grant thereunder.


                                      73
<PAGE>   79
         The following table sets forth the number of options granted to the
Named Executive Officers during the year ended December 31, 1996 and certain
other information relating to such options.

                       OPTION GRANTS IN LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                                                                         POTENTIAL REALIZABLE
                                                                                           VALUE AT ASSUMED
                                                                                            ANNUAL RATES OF
                                                                                              STOCK PRICE
                                                                                              APPRECIATION
                                               INDIVIDUAL GRANTS                            FOR OPTION TERM   
                           -----------------------------------------------------------   ----------------------
                                                  PERCENT OF
                                                 TOTAL OPTIONS
                           NUMBER OF SECURITIES   GRANTED TO
                                UNDERLYING         EMPLOYEES     EXERCISE OR
                                 OPTIONS           IN FISCAL     BASE PRICE  EXPIRATION
       NAME                     GRANTED(1)           YEAR        (PER SHARE)    DATE        5%          10%   
- ------------------         -------------------  ---------------  ----------- ----------  ----------  ----------
<S>                              <C>                 <C>            <C>       <C>         <C>         <C>
William  C. Kennedy, Jr. .            0                 --             --           --         --           --
William C. Saunders. . . .            0                 --             --           --         --           --
Gordon D. Quick. . . . . .       40,000              15.04%         $7.75     04/22/02    105,429     $239,184
                                                                                                      
Jeffrey G. Wisocki . . . .       10,000               3.76%         $7.75     04/22/02    $26,357     $ 59,796
Brad E. Popoff . . . . . .       10,000               3.76%         $7.75     04/22/02    $26,357     $ 59,796
</TABLE>





                                      74
<PAGE>   80

(1)      20% of the options vested on the date of the grant. The remaining
         options vest in 20% increments on each of the first, second, third and
         fourth anniversaries of the date of the grant. In the event the
         optionee's position as an employee of the Company or a subsidiary
         terminates for any reason, the optionee (or upon the optionee's death,
         an executor, administrator or any person who acquired the option by
         bequest or inheritance) may exercise the option during the 60-day
         period following such termination to the extent that the option was
         exercisable on the date of termination and all options that were not
         exercisable on the date of termination will be forfeited.

         The following table sets forth the number of options exercised by the
Named Executive Officers during the year ended December 31, 1996 and the number
of options and the value of unexercised and exercised options held by them as
of December 31, 1996.

             AGGREGATED OPTION EXERCISES AND YEAR END OPTION VALUES

<TABLE>
<CAPTION>
                                                             NUMBER OF
                                                       SECURITIES UNDERLYING         VALUE OF UNEXERCISED
                            OPTION EXERCISES            UNEXERCISED OPTIONS          IN-THE-MONEY OPTIONS
                               DURING 1996             AT DECEMBER 31, 1996        AT DECEMBER 31, 1996(1)  
                      ----------------------------  ---------------------------  ---------------------------
                        NUMBER OF
                          SHARES
                         ACQUIRED        VALUE
        NAME           ON EXERCISE     REALIZED      EXERCISABLE  UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE  
- --------------------  ------------   -------------  ------------  -------------  ------------   -------------- 
<S>                       <C>         <C>              <C>            <C>        <C>             <C>           
William C. Kennedy, Jr        --               --      593,478             0     $6,258,224.80   $        0    
William C. Saunders .         --               --      593,478             0     $6,258,224.80   $        0    
Gordon D. Quick . . .         --               --       92,783        88,522     $  977,036.70   $928,024.50   
Jeffrey G. Wisocki  .     10,000      $122,950.00       26,184        30,790     $  275,770.28   $323,320.55   
Brad E. Popoff  . . .     35,000      $473,936.28        1,184        30,790     $   12,284.00   $323,320.55   
- ---------------------                                                                                               
</TABLE>

(1)      Represents the closing price per share of the Common Stock on the last
         day of the fiscal year less the option exercise price multiplied by
         the number of shares. The closing value per share was $18 1/8 on the
         last trading day of the fiscal year as reported on the Nasdaq National
         Market.

         Savings Plan. The Company has established a 401(k) Retirement
Investment Profit-Sharing Plan (the "Savings Plan") covering all of its
employees when they become eligible to participate. Pursuant to the Savings
Plan, employees





                                      75
<PAGE>   81
may elect to contribute up to 20% of their pre-tax earnings. The maximum amount
of contributions and forfeitures which may be added to the account of a
particular employee each year is $9,500. The Company is not required to make
any contributions to the Savings Plan and, did not make any such contributions
during the year ended December 31, 1996.

EMPLOYMENT CONTRACTS WITH EXECUTIVE OFFICERS

         Each of William C. Kennedy, Jr. and William C. Saunders has entered
into an employment contract with HMC (the Company's operating subsidiary)
effective February 4, 1994 and continuing through the fifth anniversary of the
consummation of the Initial Public Offering, unless terminated earlier in the
event of death, permanent disability, for "cause" or, under certain conditions,
voluntarily. The terms of Messrs. Kennedy's and Saunders' contracts provide for
an annual base salary of $330,000 for each officer, with annual increases each
year during the term of such contracts, commencing with the first month of the
second year of such term, in an amount equal to 10% of the salary paid to each
officer during the immediately preceding employment year. Each officer shall
also receive annual bonuses during the term of his contract of .75 of one
percent of an amount which is equal to the first $1,000,000 of the pre-tax
consolidated taxable income of HMC, if any, for the preceding taxable year
ended December 31 (the "Income Base") and one percent of pre-tax consolidated
taxable income above such Income Base. In addition, Messrs. Kennedy and
Saunders may receive additional discretionary bonuses during the terms of their
contracts, at the sole discretion of the board of directors of HMC. If HMC
terminates either of Messrs. Kennedy or Saunders with notice other than for
"cause," such terminated officer will be entitled to a severance payment that
is equal to the lesser of (i) the remaining amount of salary payable under the
contract or (ii) the salary the officer would have received for one year. The
employment contracts also provide that each of Messrs. Kennedy and Saunders is
subject to a covenant not to compete during the period that compensation is
paid under his employment agreement and for 24 months thereafter.

         Gordon D. Quick entered into an employment contract with HMC effective
November 23, 1994 and continuing through the fifth anniversary of the
consummation of the Initial Public Offering, unless terminated earlier in the
event of death, permanent disability, for "cause" or, under certain conditions,
voluntarily. Pursuant to the employment contract, Mr. Quick receives an annual
base salary of $275,000, with annual increases, annual bonuses and
discretionary bonuses set on substantially similar terms as those of Messrs.
Kennedy and Saunders. The employment contract also provides for a signing bonus
in the amount of $6,400 and payment of reasonable expenses in connection with
Mr. Quick's relocation at the time he joined the Company. In the event of a
termination by the Company with notice or by Mr. Quick due to the Company's
breach, Mr. Quick will be entitled to the remaining amount of salary and the
minimum bonus that would be payable under the employment contract absent the
termination. In the event of a termination by Mr. Quick of the contract with 90
days notice (other than as set forth in the preceding sentence), Mr. Quick will
be entitled to the salary payable for the remaining term of the contract or the
90-day notice period, whichever is less. Other than in the case of a
termination by Mr. Quick due to a breach by the Company, or a termination by
the Company with notice, the contract provides that Mr. Quick is subject to a
covenant not to compete for a period of 12 months after the termination of his
employment.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

         William C. Saunders, the President and Chief Executive Officer and
member of the Board of Directors, and Gordon D. Quick, the Executive Vice
President and Chief Operating Officer, annually review and adjust the salary
structures of executive officers who are not subject to employment agreements
and such decisions are subject to review by the Board of Directors. William C.
Kennedy, Jr., the Chairman of the Board of Directors and former Chief Executive
Officer of the Company, participated in such Board deliberations concerning
executive compensation.





                                      76
<PAGE>   82
                               SECURITY OWNERSHIP

         The following table sets forth certain information, as of December 31,
1996, regarding beneficial ownership of the Common Stock and the percentage of
total voting power held by (i) each stockholder who is known by the Company to
own more than five percent of the outstanding Common Stock, (ii) each director,
(iii) each Named Executive Officer and (iv) all directors and executive
officers as a group. Unless otherwise noted, the persons named below have sole
voting and investment power with respect to such shares.

<TABLE>
<CAPTION>
                                                                NUMBER OF SHARES
                                                                 OF COMMON STOCK       PERCENT OF CLASS
              NAME OF HOLDER                                    BENEFICIALLY OWNED     BENEFICIALLY OWNED
- ------------------------------------------                      ------------------     ------------------
<S>                                                             <C>                    <C>
Erin Mills Stockholders(1)  . . . . . . . . . . . . . . . . . .     9,833,206                 39.6%
  7501 Keele Street
  Suite 500
  Concord, Ontario L4K1YZ, Canada
Southwestern Bell Wireless Holdings, Inc.(2)  . . . . . . . . .     6,600,000                 21.0%
  17330 Preston Road
  Suite 100A
  Dallas, Texas 75252
Carlyle Stockholders(3) . . . . . . . . . . . . . . . . . . . .     2,723,468                 11.0%
  1001 Pennsylvania Avenue, N.W.
  Suite 220 South
  Washington, D.C. 20004-2505
The Clipper Stockholders(4) . . . . . . . . . . . . . . . . . .     1,336,016                  5.4%
  Tower 49
  12 East 49th Street
  New York, New York 10017
William C. Kennedy, Jr.(5)  . . . . . . . . . . . . . . . . . .     2,622,796                 10.3%
William C. Saunders(6)  . . . . . . . . . . . . . . . . . . . .     1,485,493                  5.8%
Gerry C. Quinn(7) . . . . . . . . . . . . . . . . . . . . . . .            --                  --
Stephen Greaves(7)  . . . . . . . . . . . . . . . . . . . . . .            --                  --
Terry S. Parker(8)  . . . . . . . . . . . . . . . . . . . . . .         3,798                   *
Gordon D. Quick(9)  . . . . . . . . . . . . . . . . . . . . . .        92,783                   *
Jeffrey G. Wisocki(10)  . . . . . . . . . . . . . . . . . . . .        29,184                   *
Brad E. Popoff(11)  . . . . . . . . . . . . . . . . . . . . . .         1,184                   *
All directors and executive officers as a group (15
  persons)(12)  . . . . . . . . . . . . . . . . . . . . . . . .     4,368,147                 16.6%
</TABLE>

________________________________________________________________________________

         *  Less than 1%

(1)      Represents (i) 9,061,310 shares of Common Stock owned of record by
         Erin Mills International Investment Corporation, (ii) 527,680 shares
         owned of record by The Erin Mills Development Corporation, and (iii)
         244,216 shares owned of record by The Erin Mills Investment
         Corporation. This beneficial ownership information is based on the
         most recent Schedule 13D filed with the Commission by the beneficial
         owners named above, which reflected ownership of Common Stock as of
         December 31, 1996.

(2)      Represents (i) 1,600,000 shares of Common Stock issuable to SBC upon
         the conversion of shares of Series D Preferred Stock and (ii)
         5,000,000 shares of Common Stock issuable to SBC upon the exercise of
         the Warrants.  SBC Communications Inc., the parent of SBC, may be
         deemed to share voting and dispositive power with respect to the
         foregoing shares of Common Stock with SBC. Information regarding
         beneficial ownership of shares of Common Stock by SBC Communications
         Inc. and SBC is based on the most recent Schedule 13D filed with the
         Commission by the beneficial owners named above, which reflected
         ownership of Common Stock as of December 31, 1996.





                                      77
<PAGE>   83
(3)      Represents (i) 2,222,799 shares owned of record by
         Carlyle-HighwayMaster Investors, L.P., (ii) 209,354 shares owned of
         record by Carlyle-HighwayMaster Investors II, L.P. and (iii) 291,315
         shares of record owned by TC Group, L.L.C. Carlyle-HighwayMaster
         Investors, L.P., TC Group, L.L.C. and TCG Holdings, L.L.C., the
         managing member of TC Group, L.L.C., are deemed to share beneficial
         ownership of the shares owned of record by Carlyle- HighwayMaster
         Investors, L.P. Carlyle-HighwayMaster Investors II, L.P., TC Group,
         L.L.C. and TCG Holdings, L.L.C. are deemed to share beneficial
         ownership of the shares owned of record by Carlyle-HighwayMaster
         Investors II, L.P. TC Group, Inc., L.L.C., TCG Holdings, L.L.C., and
         TC Group Investment Holdings, L.L.C., an affiliate of TC Group, L.L.C.
         and TCG Holdings, L.L.C., are deemed to share beneficial ownership of
         the shares owned of record by TC Group, L.L.C. TC Group, L.L.C. is a
         party to an agreement with Chase Manhattan Investment Holdings, Inc.
         ("Chase") and Archery Partners ("Archery"), pursuant to which Chase
         and Archery have agreed to vote their shares of Common Stock as
         directed by TC Group, L.L.C. As a result off such agreement, TC Group,
         L.L.C. may be deemed to share beneficial ownership of such shares. TC
         Group, L.L.C. disclaims beneficial ownership of such shares. This
         beneficial ownership information is based on the most recent Schedule
         13D filed with the Commission by the beneficial owners named above,
         which reflected ownership of Common Stock as of December 31, 1996.

(4)      Represents (i) 666,322 shares beneficially owned by Clipper/Merban,
         L.P., (ii) 657,889 shares beneficially owned by Clipper/ Merchant
         Partners, L.P. and (iii) 11,805 shares are beneficially owned by
         Clipper Capital Associates, L.P. Clipper Capital Associates, L.P. is
         the sole general partner of Clipper/Merchant Partners, L.P. Pursuant
         to certain limited partnership agreements between Clipper Capital
         Associates, L.P., Clipper Curacao Inc. and Clipper/Merban, L.P.,
         Clipper Capital Associates, L.P. is the investment general partner of
         Clipper/Merban, L.P., with sole investment authority and power to vote
         or direct the vote. Clipper Capital Associates, Inc. is the sole
         general partner of Clipper Capital Associates, L.P. This beneficial
         ownership information is based on the most recent Schedule 13G filed
         with the Commission by the beneficial owners named above, which
         reflected ownership of Common Stock as of December 31, 1996.

(5)      Includes 593,478 shares of Common Stock that may be acquired by Mr.
         Kennedy upon exercise of currently exercisable options granted under
         the Stock Option Plan.

(6)      Includes 593,478 of such shares that may be acquired by Mr. Saunders
         upon exercise of currently exercisable options granted under the Stock
         Option Plan.

(7)      Messrs. Quinn and Greaves of the Erin Mills Stockholders. Pursuant to
         an agreement entered into with the Erin Mills Stockholders, Mr. Quinn
         has a right to acquire up to 3% of the interest in the Company held by
         such stockholders.

(8)      Represents vested Common Stock Options totaling 3,798 shares.

(9)      Includes 92,783 of such shares that may be acquired by Mr. Quick upon
         exercise of currently exercisable options granted under the Stock
         Option Plan.

(10)     Includes 26,184 of such shares that may be acquired by Mr. Wisocki
         upon exercise of currently exercisable options granted under the Stock
         Option Plan.

(11)     Includes 1,184 of such shares that may be acquired by Mr. Popoff upon
         exercise of currently exercisable options granted under the Stock
         Option Plan.

(12)     Includes 1,435,457 shares subject to options granted under the Stock
         Option Plan or otherwise that are exercisable within 60 days of
         December 31, 1996 by a total of 15 directors and executive officers.





                                       78
<PAGE>   84
         The Company is a party to the Amended Stockholders' Agreement by and
among the Carlyle Stockholders, the Clipper Stockholders, the Erin Mills
Stockholders, William C. Kennedy, Jr., William C. Saunders, Robert T. Hayes and
Robert S. Folsom. The parties to the Amended Stockholders' Agreement have
agreed to vote the shares of Common Stock held by them with respect to certain
matters as specified therein, and accordingly, may be deemed to beneficially
own all the shares of Common Stock subject to the terms of the Amended
Stockholders' Agreement. In total, 19,625,129 shares of Common Stock,
representing 78.98% of the outstanding shares of Common Stock at December 31,
1996, are subject to the Amended Stockholders' Agreement. All of the parties to
the Amended Stockholders' Agreement who have filed Schedule 13Ds or Schedule
13Gs with the Commission have disclaimed beneficial ownership to any shares of
Common Stock held by any other party to the Amended Stockholders' Agreement as
a result of such agreement.

              CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

CARLYLE NOTES

         General. Prior to January 1, 1996, the Company issued certain
promissory notes (the "Carlyle Notes") to the Carlyle Stockholders. The Carlyle
Notes bore interest at 8% per annum and were originally scheduled to mature on
December 31, 1996. Interest on the Carlyle Notes was payable quarterly in
arrears. On each interest payment date, 75% of any interest payment was
required to be paid in cash, with the remaining balance to be paid, at the
option of the Company, either in cash or by adding to the principal balance of
the Carlyle Notes. As of January 1, 1996, there were outstanding Carlyle Notes
in the aggregate principal amount of approximately $12.7 million.

         Note Extension. On March 29, 1996, the Company and the holders of the
Carlyle Notes entered into a Note Extension Option Agreement (the "Extension
Option"). Under the Extension Option, the Company obtained the unilateral right
to elect to extend the maturity date of the Carlyle Notes to June 30, 1997. As
consideration for the granting of the Extension Option, HMC, the Company's
operating subsidiary, guaranteed the repayment of the Carlyle Notes. In the
event the Company chose to exercise its right to extend the maturity date, the
Extension Option required that the Company grant to the holders of the Carlyle
Notes certain warrants to purchase 100,000 shares of Common Stock at the lower
of the closing market price per share on March 27, 1996 or December 31, 1996.
In addition, if the Company exercised the Extension Option, the interest rate
on the Carlyle Notes would increase by 2% effective January 1, 1997 and would
again increase by 2% effective April 1, 1997 and repayment of the Carlyle Notes
would be guaranteed by a pledge of the stock of HMC.

         Note Exchange. On September 27, 1996, all outstanding Carlyle Notes
were surrendered to the Company for cancellation in exchange for shares of
Common Stock. See "-- Recapitalization Transactions" below.

SBC TRANSACTIONS

         Sale of Series D Preferred Stock. On September 27, 1996, the Company
and SBC entered into a purchase agreement (the "SBC Purchase Agreement"),
pursuant to which the Company sold 1,000 shares of a new series of its
preferred stock, par value $.01 per share, designated as Series D Participating
Convertible Preferred Stock ("Series D Preferred Stock") to SBC in
consideration of a cash payment in the amount of $20.0 million.

         Authorization of Class B Common Stock. As required under the terms of
the SBC Purchase Agreement, the Company amended its Certificate of
Incorporation in January 1997 to authorize the creation of Class B Common
Stock, which is a new class of common stock into which shares of Series D
Preferred Stock are convertible.

         Issuance of SBC Warrants. On September 27, 1996, the Company issued
certain warrants (the "SBC Warrants") to SBC. The SBC Warrants entitle SBC to
purchase from the Company (i) 3,000,000 shares of Common Stock at an exercise
price of $14.00 per share and (ii) 2,000,000 shares of Common Stock at an
exercise price of $18.00 per share, in each case subject to adjustment to
prevent dilution.





                                       79
<PAGE>   85
         Other Agreements. On September 27, 1996, HMC entered into a Technical
Services Agreement with SBC pursuant to which SBC or one or more of its
affiliates will provide HMC with certain technical and advisory services in
connection with, among other things, the operation and improvement of its
communications transmission system.

         In addition, under the terms of the SBC Purchase Agreement, promptly
after Regulatory Relief is obtained, the Company will cause HMC to enter into a
Voice and Data Services Agreement (the "Voice and Data Services Agreement")
with an affiliate of SBC. The Voice and Data Services Agreement, if entered
into by the parties, will provide that HMC will purchase long distance and
other voice and data services from such affiliate of SBC.

AMENDED STOCKHOLDERS' AGREEMENT

         General. As of February 4, 1994, the Company, the Erin Mills
Stockholders, the Carlyle Stockholders, the By- Word Stockholders, and certain
other parties entered into a Stockholders' Agreement. In connection with the
transactions with SBC consummated on September 27, 1996, such agreement was
amended and restated in order, among other things to add SBC as a party
thereto. The Amended Stockholders' Agreement contains provisions relating to,
among other things, (i) the transfer of shares of Common Stock by certain of
the stockholders who are parties thereto, (ii) the grant of registration rights
by the Company to the stockholders who are parties thereto and (iii) the
election of members of the Company's Board of Directors. As used herein, (a)
the term "Erin Mills Stockholders" means Erin Mills International Investment
Corporation, The Erin Mills Development Corporation and The Erin Mills
Investment Corporation, (b) the term "Carlyle Stockholders" means the Clipper
Stockholders (as defined below), Carlyle-HighwayMaster Investors, L.P.,
Carlyle-HighwayMaster Investors II, L.P., TC Group, L.L.C., Mark D. Ein, Chase
Manhattan Investment Holdings, Inc., H.M.  Rana Investments Limited and Archery
Partners, (c) the term "Clipper Stockholders" means Clipper Capital Associates,
L.P., Clipper/Merban, L.P. and Clipper/Merchant Partners, L.P. and (d) the term
"By-Word Stockholders" means William C.  Kennedy, Jr., Donald M. Kennedy,
William C. Saunders, Robert S. Folsom and Robert T. Hayes.

         Election of Directors. The Amended Stockholders' Agreement provides
that the parties will take all action (including the voting of shares of Common
Stock owned by them) necessary to ensure that the Board of Directors of the
Company consists of (i) two directors designated by the Erin Mills
Stockholders, (ii) one director designated by the Carlyle Stockholders (other
than the Clipper Stockholders), (iii) two directors designated by the By-Word
Stockholders (one of which will be the chief executive officer of the Company)
and (iv) two independent directors (except that the addition of a second
independent director to the Board of Directors is not required to occur until
the date of the next annual meeting of the stockholders of the Company after
September 27, 1996). The Carlyle Stockholders have declined to exercise their
right to designate a director. Terry S. Parker serves as an independent
director. The Company has not yet identified a second independent director but
intends to do so as promptly as practicable. The Erin Mills Stockholders have
designated Gerry C. Quinn and Stephen Greaves and the By-Word Stockholders have
designated William C. Kennedy, Jr.  and William C. Saunders to serve as
directors. Prior to the receipt of Regulatory Relief, SBC will not be entitled
to designate a director, but will have the right to designate a non-voting
delegate who will attend all meetings of the Board of Directors and receive all
materials distributed to directors of the Company. Upon the conversion of
Series D Preferred Stock into Class B Common Stock (which will occur upon
receipt of Regulatory Relief), SBC will be entitled to designate one member of
the Board of Directors of the Company. In addition, if at any time after the
conversion of Series D Preferred Stock into Class B Common Stock SBC and its
affiliates beneficially own 20% or more of the outstanding Common Stock
(including shares issuable upon conversion of Series D Preferred Stock or Class
B Common Stock or other convertible securities or upon the exercise of
outstanding options, warrants or rights, but excluding shares issuable upon the
exercise of the SBC Warrants or any Excluded Options) on a fully diluted basis,
SBC will be entitled to designate a second member of the Board of Directors. No
stockholder or group of stockholders will be entitled to designate any director
if the percentage of the outstanding Common Stock (including shares issuable
upon conversion of outstanding securities or upon the exercise of outstanding
options, warrants or rights, but excluding shares issuable upon the exercise of
the SBC Warrants or any Excluded Options) beneficially owned by such
stockholder or group of stockholders falls below 5% (or with respect to the
Erin Mills Stockholders and By-Word Stockholders, 20% for the right to
designate two directors and 5% for the right to designate one director) on a
fully diluted basis.





                                       80
<PAGE>   86
         Right of First Refusal. Under the terms of the Amended Stockholders'
Agreement, the Carlyle Stockholders (other than the Clipper Stockholders), the
Erin Mills Stockholders, William C. Kennedy, Jr. and William C. Saunders (the
"First Refusal Stockholders") granted a right of first refusal to SBC with
respect to all shares of Common Stock owned by them.  Subject to certain
exceptions, such right of first refusal requires that, prior to selling any
shares of Common Stock, a First Refusal Stockholder must offer such shares for
sale to SBC in accordance with the terms of the Amended Stockholders'
Agreement.

         Registration Rights. The Amended Stockholders' Agreement also provides
for the grant of certain demand, piggyback or other registration rights to the
stockholders who are parties thereto. In particular, such agreement provides
that, with respect to an aggregate of 1,818,018 shares of Common Stock issued
to the Erin Mills Stockholders and certain of the Carlyle Stockholders in
connection with the Recapitalization Transactions, the Company will register
one-half of such shares under the Securities Act, for sale on or after March
31, 1997 and will register the remainder of such shares under the Securities
Act for sale on or after September 27, 1997. The Erin Mills Stockholders and
the Carlyle Stockholders waived the right to cause the Company to register
one-half of such shares for sale on or after March 31, 1997, although they have
reserved the right to revoke such waiver at any time.  The Company expects to
register all of such shares for sale in the near future.

         In addition, under the Amended Stockholders' Agreement, a majority of
certain stockholders have the right to demand that the shares of Common Stock
held by them be registered under the Securities Act on up to two separate
occasions. However, if the Board of Directors of the Company reasonably
determines that, due to a pending or contemplated acquisition or disposition,
such a demand registration would have a material adverse effect on the Company,
the Company may defer such registration for a period not to exceed 180 days.
Furthermore, if the managing underwriter or underwriters or the holders of a
majority of the registerable securities held by the stockholders demanding the
registration determine that the number of shares of Common Stock proposed to be
sold pursuant to the demand registration provisions exceeds the amount that can
be sold without having a material adverse effect on the proposed offering, the
Company may exclude certain shares from the offering.

         The Amended Stockholders' Agreement also grants piggyback registration
rights to certain stockholders.  Accordingly, whenever the Company proposes to
register any shares of Common Stock (or securities convertible into or
exchangeable for, or options, warrants or other rights to acquire, Common
Stock) under the Securities Act (other than registrations on Form S-4 or Form
S-8), the holder of shares of Common Stock have the right to include the shares
of Common Stock held by them in any such registration, including the shelf
registration statement to be filed pursuant to the Warrant Registration Rights
Agreement. However, if the inclusion of shares of Common Stock pursuant to the
piggyback registration provisions is reasonably determined by the managing
underwriter or underwriters to materially adversely affect the success of the
proposed offering, the Company may exclude certain shares from the offering.

RECAPITALIZATION TRANSACTIONS

         On September 27, 1996, the Company, the Erin Mills Stockholders,
certain of the Carlyle Stockholders and certain other holders of outstanding
securities of the Company entered into the Recapitalization Agreement and
consummated the transactions contemplated thereby. In particular, upon the
terms and conditions set forth in the Recapitalization Agreement, (i) the
Company repaid in full the principal amount of and interest accrued on certain
promissory notes in the aggregate principal amount of $5.0 million executed in
favor of an Erin Mills Stockholder in order to evidence the Company's
obligation to repay certain advances made by such Erin Mills Stockholder in
August and September 1996 to enable the Company to meet its short-term working
capital and other requirements, (ii) the Company issued an aggregate of 800,000
shares of Common Stock to two Erin Mills Stockholders in exchange for aggregate
cash payments in the amount of $10.0 million, (iii) the Company issued an
aggregate of 864,000 shares of Common Stock to three Erin Mills Stockholders
and two other persons in exchange for the surrender to the Company for
cancellation of all outstanding shares of Series B Preferred Stock, par value
$.01 per share, of the Company, (iv) the Company paid to certain of the Carlyle
Stockholders a portion of the accrued and unpaid interest on the Carlyle Notes





                                       81
<PAGE>   87
and (v) the Company issued an aggregate of 1,018,018 shares of Common Stock in
exchange for the surrender of the Carlyle Notes for cancellation.

OTHER AGREEMENTS

         The Company has entered into a lease involving 55,687 square feet of
office space in Dallas, Texas, at an average price of $14.70 per square foot
per year, which the Company uses for its headquarters. The lessor of such
property is Folsom Investments, Inc., a Texas corporation which is wholly-owned
by Robert S. Folsom, a stockholder of the Company.

         The Company has assumed the rights and obligations of a certain Agency
Agreement, dated as of February 1, 1993 (the "Agency Agreement"), by and
between a predecessor partnership to the Company and Saunders, Lubinski &
White, Inc., now known as Saunders Ream (the "Agency"). The Agency Agreement
provides that in consideration for its advertising services, the Agency will
receive a 5% profit on all services provided to the Company, subject to future
negotiation, in addition to media, production and other reasonable expenses.
The Agency Agreement may be terminated, with or without cause, at any time by
either party, with 90 days notice. William C. Saunders, President and Chief
Executive Officer and a director of the Company, was a principal stockholder
and officer of the Agency until January 1997. Mr. Saunders will continue to
receive deferred payments based upon a portion of the gross income of the
Agency with respect to new clients over the next five years. During 1993, 1994,
1995 and 1996, the Company paid $0.8 million, $1.2 million, $1.4 million and
$0.4 million, respectively, under the Agency Agreement.

         In 1997, an affiliate of SBC provided a limited guarantee of certain
contractual obligations of the Company in order to ensure that the Company
would receive payment of certain funds owing to it as of an earlier date than
such funds would otherwise become available. This guarantee terminated upon the
consummation of the Units Offering, and it is not expected that SBC will
provide similar guarantees in the future.

         In early August 1997, the Company entered into an agreement with the
Erin Mills Stockholders pursuant to which the Erin Mills Stockholders agreed to
fund the Company's short-term working capital requirements up to a maximum of
$5.0 million.  This agreement terminated upon the consummation of the Units
Offering.

FUTURE TRANSACTIONS

         From time to time, the Company may enter into other transactions and
agreements with its affiliates. Although the Company intends that the terms of
any such future transactions and agreements will be at least as favorable to
the Company as could be obtained from unaffiliated third parties, there can be
no assurance that this will be the case. Any such future transactions that are
material to the Company will be approved by a majority of the Company's
independent directors.





                                       82
<PAGE>   88
                               THE EXCHANGE OFFER

PURPOSE AND EFFECT OF THE EXCHANGE OFFER

         The Old Notes were originally sold by the Company on September 23,
1997 to the Initial Purchasers pursuant to the Purchase Agreement.  The Initial
Purchasers subsequently resold the Old Notes to qualified institutional buyers
in reliance on Rule 144A under the Securities Act and pursuant to offers and
sales that occurred outside the United States within the meaning of Regulation
S under the Securities Act.  As a condition to the completion of the Units
Offering, the Company entered into the Registration Rights Agreement with the
Initial Purchasers pursuant to which the Company agreed to file with the
Commission the Exchange Offer Registration Statement on the appropriate form
under the Securities Act with respect to an offer to exchange the Old Notes for
Exchange Notes. The Exchange Notes will be substantially identical to the Old
Notes, except that the Exchange Notes will bear a Series B designation and will
have been registered under the Securities Act and, therefore will not contain
terms with respect to transfer restrictions (other than those that might be
imposed by state securities laws).  If (i) the Company is not required to file
the Exchange Offer Registration Statement or permitted to commence or accept
tenders pursuant to the Exchange Offer because the Exchange Offer is not
permitted by applicable law or Commission policy or (ii) any Holder of Transfer
Restricted Securities (as defined herein) notifies the Company within 20
business days after the consummation of the Exchange Offer that (a) it is
prohibited by law or Commission policy from participating in the Exchange Offer
or (b) it may not resell the Exchange Notes acquired by it in the Exchange
Offer to the public without delivering a prospectus and the prospectus
contained in the Exchange Offer Registration Statement is not appropriate or
available for such resales or (c) it is a broker-dealer and owns Old Notes
acquired directly from the Company or an affiliate of the Company, the Company
will file with the Commission the Shelf Registration Statement.  For purposes
of the Exchange Offer, "Transfer Restricted Securities" means each Old Note
until (i) the date on which such Old Note has been exchanged by a person other
than a broker-dealer for an Exchange Note in the Exchange Offer, (ii) following
the exchange by a broker-dealer in the Exchange Offer of a Old Note for an
Exchange Note, the date on which such Exchange Note is sold to a purchaser who
receives from such broker-dealer on or prior to the date of such sale a copy of
this Prospectus if it is permissible under applicable law and Commission policy
to use this Prospectus for such purpose, (iii) the date on which such Old Note
has been effectively registered under the Securities Act and disposed of in
accordance with the Shelf Registration Statement or (iv) the date on which such
Old Note is distributed (and not merely eligible for distribution) to the
public pursuant to Rule 144 under the Securities Act.

         Under existing interpretations of the staff of the Commission, the
Exchange Notes would, in general, be freely transferable after the Exchange
Offer without further registration under the Securities Act.  However, any
purchaser of Old Notes who is an "affiliate" of the Company or 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 Old 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 Old Notes, unless such sale or transfer is made pursuant to an exemption
from such requirements.

         Each holder who wishes to exchange such Old Notes for Exchange Notes
in the Exchange Offer will be required to make certain representations,
including representations that (i) it is not an affiliate of the Company, (ii)
it is not engaged in, and does not intend to engage in, and has no arrangement
or understanding with any person to participate in, a distribution of the
Exchange Notes and (iii) it is acquiring the Exchange Notes in its ordinary
course of business.  In addition, broker-dealers receiving Exchange Notes in
the Exchange Offer will have a prospectus delivery requirement with respect to
resales of Exchange Notes. The Commission has taken the position that such
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 Old Notes) with the prospectus contained in the Exchange Offer
Registration Statement.  Under the Registration Rights Agreement, the Company
is required to allow such broker-dealers to use the prospectus contained in the
Exchange Offer Registration Statement in connection with the resale of such
Exchange Notes for a period of 180 days after the Exchange Offer Registration
Statement is declared effective.





                                       83
<PAGE>   89
         The Registration Rights Agreement provides that, to the extent not
prohibited by any applicable law or applicable interpretation of the staff of
the Commission, (i) the Company will file an Exchange Offer Registration
Statement with the Commission on or prior to 45 days after the completion of
the Units Offering, (ii) the Company will use its best efforts to have the
Exchange Offer Registration Statement declared effective by the Commission on
or prior to 135 days after the completion of the Units Offering, (iii) the
Company will commence the Exchange Offer and use its best efforts to issue on
or prior to 180 days after the completion of the Units Offering, Exchange Notes
in exchange for all Old Notes tendered prior thereto in the Exchange Offer, and
(iv) if obligated to file the Shelf Registration Statement, the Company will
file the Shelf Registration Statement with the Commission on or prior to 45
days after such filing obligation arises, use its best efforts to cause the
Shelf Registration Statement to be declared effective by the Commission on or
prior to 180 days after the completion of the Units Offering, and keep the
Shelf Registration Statement effective until the earlier of (A) the date two
years after the effective date thereof, (B) the consummation of the Exchange
Offer with respect to all Transfer Restricted Securities and the expiration of
20 business days after the consummation thereof if during such 20 day period no
notice from a broker-dealer shall have been delivered to the Company, and (C)
the date when all securities covered by the Shelf Registration Statement have
been sold pursuant to the Shelf Registration Statement.

         If (i) the Company fails to file any of the registration statements
required by the Registration Rights Agreement on or before the date specified
for such filing, (ii) any of such registration statements are not declared
effective by the Commission on or prior to the date specified for such
effectiveness (the "Effectiveness Target Date"), (iii) the Company fails to
commence, accept tenders and, in the case of accepted tenders, issue Exchange
Notes in respect of accepted tenders under the Exchange Offer within 30
business days of the Effectiveness Target Date with respect to the Exchange
Offer Registration Statement or (iv) the Shelf Registration Statement or the
Exchange Offer Registration Statement is declared effective but thereafter
ceases to be effective or usable in connection with resales of Transfer
Restricted Securities during the periods specified in the Registration Rights
Agreement (each such event referred to in clauses (i) through (iv) above a
"Registration Default"), then the Company will pay Liquidated Damages to each
Holder of Notes in an amount equal to 0.25% per annum of the outstanding
principal amount of the Notes for the first 90 days after such Registration
Default.  The amount of the Liquidated Damages will increase, up to a maximum
rate of 1.0% per annum, by an additional 0.25% per annum with respect to each
subsequent 90-day period.  Following the cure of all Registration Defaults, the
accrual of Liquidated Damages will cease.

         The summary herein of certain provisions of the Registration Rights
Agreement does not purport to be complete and is subject to, and is qualified
in its entirety by, all the provisions of the Registration Rights Agreement, a
copy of which is filed as an exhibit to the Exchange Offer Registration
Statement of which this Prospectus is a part.

         Following the consummation of the Exchange Offer, holders of the Old
Notes who were eligible to participate in the Exchange Offer but who did not
tender their Old Notes will not have any further registration rights and such
Old





                                       84
<PAGE>   90
Notes will continue to be subject to certain restrictions on transfer.
Accordingly, the liquidity of the market for such Old Notes could be adversely
affected.

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 Old Notes validly tendered and not withdrawn prior to 5:00 p.m., New York
time, on the Expiration Date.  The Company will issue $1,000 principal amount
of Exchange Notes in exchange for each $1,000 principal amount of outstanding
Old Notes accepted in the Exchange Offer.  Holders may tender some or all of
their Old Notes pursuant to the Exchange Offer.  However, Old Notes may be
tendered only in integral multiples of $1,000.

         The form and terms of the Exchange Notes are the same as the form and
terms of the Old Notes except that (i) the Exchange Notes bear a Series B
designation and a different CUSIP Number from the Old Notes, (ii) the Exchange
Notes have been registered under the Securities Act and hence will not bear
legends restricting the transfer thereof and (iii) the holders of the Exchange
Notes will not be entitled to certain rights under the Registration Rights
Agreement, including the provisions providing for an increase in the interest
rate on the Old Notes in certain circumstances relating to the timing of the
Exchange Offer, all of which rights generally will terminate when the Exchange
Offer is terminated.  The Exchange Notes will evidence the same debt as the Old
Notes and will be entitled to the benefits of the Indenture.

         The Exchange Offer is not conditioned upon any minimum number of Old
Notes being tendered.  As of the date of this Prospectus, $125,000,000
aggregate principal amount of Old Notes were outstanding.

         Holders of Old Notes do not have any appraisal or dissenters rights
under the General Corporation Law of Delaware 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 Old
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 Old Notes are not accepted for exchange because of an
invalid tender, the occurrence of certain other events set forth herein or
otherwise, the certificates for any such unaccepted Old Notes will be returned,
without expense, to the tendering holder thereof as promptly as practicable
after the Expiration Date.

         Holders who tender Old 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
Old Notes pursuant to the Exchange Offer.  The Company will pay all charges and
expenses, other than transfer taxes in certain circumstances, 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 time, on
December 10, 1997, 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.

         In order to extend the Exchange Offer, the Company will notify the
Exchange Agent of any extension by oral or written notice and will mail to the
registered holders an announcement thereof, each prior to 9:00 a.m., New York
time, on the next business day after the previously scheduled expiration date.





                                       85
<PAGE>   91
         The Company reserves the right, in its sole discretion, (i) to delay
accepting any Old Notes, to extend the Exchange Offer or to terminate the
Exchange Offer if any of the conditions set forth below under " -- Conditions"
shall not have been satisfied, 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 oral or
written notice thereof to the registered holders.

INTEREST ON THE EXCHANGE NOTES

         The Exchange Note will bear interest from the most recent date to
which interest has been paid or duly provided for on the Old Note surrendered
in exchange for such Exchange Note or, if no interest has been paid or duly
provided for on such Old Note, from September 23, 1997.  Interest on the
Exchange Notes is payable semi-annually on each March 15 and September 15,
commencing on March 15, 1998.

         Holders of Old Notes whose Old Notes are accepted for exchange will
not receive accrued interest on such Old Notes for any period from and after
the last date to which interest has been paid or duly provided for on the Old
Notes prior to the original issue date of the Exchange Notes or, if no such
interest has been paid or duly provided for will not receive any accrued
interest on such Old Notes, and will be deemed to have waived, the right to
receive any interest on such Old Notes accrued from and after September 23,
1997.

PROCEDURES FOR TENDERING

         For a holder of Old Notes to tender Old Notes validly pursuant to the
Exchange Offer, a properly completed and duly executed Letter of Transmittal
(or facsimile thereof), with any required signature guarantee, or (in the case
of a book-entry transfer), an Agent's Message in lieu of the Letter of
Transmittal, and any other required documents, must be received by the Exchange
Agent at the address set forth in the Letter of Transmittal prior to 5:00 p.m.,
New York time, on the Expiration Date.  In addition, prior to 5:00 p.m., New
York time, on the Expiration Date, either (a) certificates for tendered Old
Notes must be received by the Exchange Agent at such address or (b) such Old
Notes must be transferred pursuant to the procedures for book-entry transfer
described below (and a confirmation of such tender received by the Exchange
Agent, including an Agent's Message if the tendering holder has not delivered a
Letter of Transmittal).

         The term "Agent's Message" means a message transmitted by the
Depository, received by the Exchange Agent and forming part of the confirmation
of a book-entry transfer, which states that the Depository has received an
express acknowledgment from the participant in the Depository tendering Old
Notes which are the subject of such book-entry confirmation that such
participant has received and agrees to be bound by the terms of the Letter of
Transmittal and that the Company may enforce such agreement against such
participant.  In the case of an Agent's Message relating to guaranteed
delivery, the term means a message transmitted by the Depository and received
by the Exchange Agent, which states that the Depository has received an express
acknowledgment from the participant in the Depository tendering Old Notes that
such participant has received and agrees to be bound by the Notice of
Guaranteed Delivery.

         By tendering Old Notes pursuant to the procedures set forth above,
each holder will make to the Company the representations set forth above in the
third paragraph under the heading " -- Purpose and Effect of the Exchange
Offer."

         The tender by a holder and the acceptance thereof by the Company will
constitute 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 OLD NOTES AND THE LETTER OF TRANSMITTAL AND
ALL OTHER REQUIRED DOCUMENTS TO THE EXCHANGE AGENT IS AT THE ELECTION AND SOLE
RISK OF THE HOLDER.  AS AN ALTERNATIVE TO DELIVERY BY MAIL, HOLDERS MAY WISH TO
CONSIDER





                                       86
<PAGE>   92
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 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 Old 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. see "Instruction
to Registered Holder and/or Book-Entry Transfer Facility Participant from
Owner" included with the Letter of Transmittal.

         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
below) unless the Old 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 the Medallion System (an "Eligible Institution").

         If the Letter of Transmittal is signed by a person other than the
registered holder of any Old Notes listed therein, such Old 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 Old Notes
with the signature thereon guaranteed by an Eligible Institution.

         If the Letter of Transmittal or any Old Notes or bond powers are
signed by trustees, executors, administrators, guardians, attorneys-in-fact,
offices of corporations or others acting in a fiduciary or representative
capacity, such persons should so indicate when signing, and evidence
satisfactory to the Company of their authority to so act must be submitted with
the Letter of Transmittal.

         The Company understands that the Exchange Agent will make a request
promptly after the date of this Prospectus to establish accounts with respect
to the Old Notes at the book-entry transfer facility, The Depository Trust
Company ("DTC" or the "Book-Entry Transfer Facility"), for the purpose of
facilitating the Exchange Offer, and subject to the establishment thereof, any
financial institution that is a participant in the Book-Entry Transfer
Facility's system may make book-entry delivery of Old Notes by causing such
Book-Entry Transfer Facility to transfer such Old Notes into the Exchange
Agent's account with respect to the Old Notes in accordance with the Book-Entry
Transfer Facility's procedures for such transfer.  Although delivery of the Old
Notes may be effected through book-entry transfer into the Exchange Agent's
account at the Book-Entry Transfer Facility, an appropriate Letter of
Transmittal properly completed and duly executed with any required signature
guarantee, or, in the case of a book-entry transfer, an Agent's Message in lieu
of the Letter of Transmittal and all other required documents must in each case
be transmitted to and received or confirmed by the Exchange Agent at its
address set forth in the Letter of Transmittal on or prior to the Expiration
Date, or, if the guaranteed delivery procedures described below are complied
with, within the time period provided under such procedures.  Delivery of
documents to the Book-Entry Transfer Facility does not constitute delivery to
the Exchange Agent.

         The Exchange Agent and DTC have confirmed that the Exchange Offer is
eligible for the DTC Automated Tender Offer Program ("ATOP").  Accordingly, DTC
participants may electronically transmit their acceptance of the Exchange Offer
by causing DTC to transfer Old Notes to the Exchange Agent in accordance with
DTC's ATOP procedures for transfer.  DTC will then send an Agent's Message to
the Exchange Agent.

         All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Old Notes and withdrawal of tendered Old Notes
will be determined by the Company in its sole discretion, which determination
will be final and binding.  The Company reserves the absolute right to reject
any and all Old Notes not properly tendered





                                       87
<PAGE>   93
or any Old Notes the Company's acceptance of which would, in the opinion of
counsel for the Company, be unlawful.  The Company also reserves the right in
its sole discretion to waive any defects, irregularities or conditions of
tender as to particular Old 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 Old 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 Old
Notes, neither the Company, the Exchange Agent nor any other person shall incur
any liability for failure to give such notification.  Tenders of Old Notes will
not be deemed to have been made until such defects or irregularities have been
cured or waived.  Any Old 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.

GUARANTEED DELIVERY PROCEDURES

         Holders who wish to tender their Old Notes and (i) whose Old Notes are
not immediately available, (ii) who cannot deliver their Old Notes, the Letter
of Transmittal or any other required documents to the Exchange Agent or (iii)
who cannot complete the procedures for book-entry transfer, 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 Old Notes and the principal
         amount of Old Notes tendered, stating that the tender is being made
         thereby and guaranteeing that, within five New York Stock Exchange
         trading days after the Expiration Date, the Letter of Transmittal (or
         facsimile thereof) together with the certificate(s) representing the
         Old Notes (or a confirmation of book-entry transfer of such Old Notes
         into the Exchange Agent's account at the Book-Entry Transfer
         Facility), 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 (of facsimile thereof), as well as the certificates
         representing all tendered Old Notes in proper form for transfer (or a
         confirmation of book- entry transfer of such Old Notes into the
         Exchange Agent's account at the Book-Entry Transfer Facility), and all
         other documents required by the Letter of Transmittal are received by
         the Exchange Agent upon five 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 Old Notes according to the
guaranteed delivery procedures set forth above.

WITHDRAWAL OF TENDERS

         Except as otherwise provided herein, tenders of Old Notes may be
withdrawn at any time prior to 5:00 p.m., New York time, on the Expiration
Date.

         To withdraw a tender of Old Notes in the Exchange Offer, a telegram,
telex, letter or facsimile transmission notice of withdrawal must be received
by the Exchange Agent at its address set forth in the Letter of Transmittal
prior to 5:00 p.m., New York time, on the Expiration Date.  Any such notice of
withdrawal must (i) specify the name of the person having deposited the Old
Notes to be withdrawn (the "Depositor"), (ii) identify the Old Notes to be
withdrawn (including the certificate number(s) and principal amount of such Old
Notes, or, in the case of Old Notes transferred by book-entry transfer, the
name and number of the account at the Book-Entry Transfer Facility to be
credited), (iii) be signed by the holder in the same manner as the original
signature on the Letter of Transmittal by which such Old Notes





                                       88
<PAGE>   94
were tendered (including any required signature guarantees) or be accompanied
by documents of transfer sufficient to have the Trustee with respect to the Old
Notes register the transfer of such Old Notes into the name of the person
withdrawing the tender and (iv) specify the name in which any such Old Notes
are to be registered, if different from that of the Depositor.  All questions
as to the validity, form and eligibility (including time of receipt) of such
notices will be determined by the Company, whose determination shall be final
and binding on all parties.  Any Old 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 Old Notes so withdrawn are
validly retendered.  Any Old Notes which have been tendered but which are not
accepted for exchange will be returned to the holder thereof without cost to
such holder as soon as practicable after withdrawal, rejection of tender or
termination of the Exchange Offer.  Properly withdrawn Old Notes may be
retendered by following one of the procedures described above under " --
Procedures for Tendering" at any time prior to the Expiration Date.

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 Old Notes, and may terminate or amend the Exchange Offer as provided herein
before the acceptance of such Old 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 Company's reasonable discretion,
         might materially impair the ability of the Company to proceed with 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 law, statute, rule, regulation or interpretation
         by the staff of the Commission is proposed, adopted or enacted, which,
         in the Company's reasonable discretion, 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

                 (c)      any governmental approval has not been obtained,
         which approval the Company shall, in the Company's reasonable
         discretion, deem necessary for the consummation of the Exchange Offer
         as contemplated hereby.

         If the Company determines in its reasonable discretion that any of the
conditions are not satisfied, the Company may (i) refuse to accept any Old
Notes and return all tendered Old Notes to the tendering holders, (ii) extend
the Exchange Offer and retain all Old Notes tendered prior to the expiration of
the Exchange Offer, subject, however, to the rights of holders to withdraw such
Old Notes (see "-- Withdrawal of Tenders"), or (iii) waive such unsatisfied
conditions with respect to the Exchange Offer and accept all properly tendered
Old Notes which have not been withdrawn.

EXCHANGE AGENT

         Texas Commerce Bank National Association (the "Exchange Agent") 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 Notice of Guaranteed Delivery
should be directed to the Exchange Agent at the address indicated in the Letter
of Transmittal.  Delivery to an address other than as set forth in the Letter
of Transmittal will not constitute a valid delivery.





                                       89
<PAGE>   95
FEES AND EXPENSES

         The expenses of soliciting tenders will be borne by the Company.  The
principal solicitation is being made by mail; however, additional solicitation
may be made by telegraph, telecopy, 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.

ACCOUNTING TREATMENT

         The Exchange Notes will be recorded at the same carrying value as the
Old Notes, which is face value, as reflected in the Company's accounting
records on the date of exchange.  Accordingly, no gain or loss for accounting
purposes will be recognized by the Company.  The expenses of the Exchange Offer
will be expensed over the term of the Exchange Notes.

CONSEQUENCES OF FAILURE TO EXCHANGE

         The Old Notes that are not exchanged for Exchange Notes pursuant to
the Exchange Offer will remain restricted securities.  Accordingly, such Old
Notes may be resold only.

RESALE OF THE EXCHANGE NOTES

         With respect to resales of Exchange Notes, based on interpretations by
the staff of the Commission set forth in no-action letters issued to third
parties (for example, the letters of the commission to (i) Exxon Capital
Holdings Corporation, available May 13, 1988, (ii) Morgan Stanley & Co., Inc.
available June 5, 1991 and (iii) Shearson & Sterling, available July 2, 1993),
the Company believes that a holder or other person (other than a person that is
an affiliate of the Company within the meaning of Rule 405 under the Securities
Act) who receives Exchange Notes in exchange for Old Notes in the ordinary
course of business and who is not participating, does not intend to
participate, and has no arrangement or understanding with any person to
participate, in the distribution of the Exchange Notes, will be allowed to
resell the Exchange Notes to the public without further registration under the
Securities Act and without delivering to the purchasers of the Exchange Notes a
prospectus that satisfies the requirements of Section 10 of the Securities Act.
However, if any holder acquires Exchange Notes in the Exchange Offer for the
purpose of distributing or participating in a distribution of the Exchange
Notes, such holder cannot rely on the position of the staff of the Commission
enunciated in such no-action letters or any similar interpretive letters, and
must comply with the registration and prospectus delivery requirements of the
Securities Act in connection with any resale transaction, unless an exemption
from registration is otherwise available.  Further, each Participating
Broker-Dealer that receives Exchange Notes for its own account in exchange for
Old Notes, where such Old Notes were acquired by such Participating
Broker-Dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Notes.

         Each holder of Old Notes who wishes to exchange Old Notes for Exchange
Notes in the Exchange Offer will be required to represent that (i) it is not an
affiliate of the Company, (ii) it is not engaged in, and does not intend to
engage in, and has no arrangement or understanding with any person to
participate in, a distribution of the Exchange Notes and (iii) it is acquiring
the Exchange Notes in its ordinary course of business.  Each broker-dealer that
receives





                                       90
<PAGE>   96
Exchange Notes for its own account pursuant to the Exchange Offer must
acknowledge that it acquired the Old Notes for its own account as the result of
market-making activities or other trading activities and must agree that it
will deliver a prospectus meeting the requirements of the Securities Act 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.  Based on the position taken by the staff of the Division
of Corporation Finance of the Commission in the interpretive letters referred
to above, the Company believes that Participating Broker-Dealers who acquired
Old Notes for their own accounts as a result of market-making activities or
other trading activities may fulfill their prospectus delivery requirements
with respect to the Exchange Notes received upon exchange of such Old Notes
(other than Old Notes which represent an unsold allotment from the original
sale of the Old Notes) with a prospectus meeting the requirements of the
Securities Act, which may be the prospectus prepared for an exchange offer so
long as it contains a description of the plan of distribution with respect to
the resale of such Exchange Notes.  Accordingly, this Prospectus, as it may be
amended or supplemented from time to time, may be used by a Participating
Broker-Dealer during the period referred to below in connection with resales of
Exchange Notes received in exchange for Old Notes where such Old Notes were
acquired by such Participating Broker-Dealer for its own account as a result of
market-making or such other trading activities.  Subject to certain provisions
set forth in the Registration Rights Agreement, the Company has agreed that
this 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 such
Exchange Notes for a period ending 180 days after the date on which the
Exchange Offer Registration Statement is declared effective.  However, a
Participating Broker-Dealer who intends to use this Prospectus in connection
with the resale of Exchange Notes received in exchange for Old Notes pursuant
to the Exchange Offer must notify the Company, or cause the Company to be
notified, on or prior to the Expiration Date, that it is a Participating
Broker-Dealer.  Such notice may be given in the space provided for that purpose
in the Letter of Transmittal or may be delivered to the Exchange Agent at one
of the addresses set forth in the Letter of Transmittal.  See "Plan of
Distribution."  Any Participating Broker-Dealer who is an "affiliate" of the
Company may not rely on such interpretive letters and must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with any resale transaction.





                                       91
<PAGE>   97
                         DESCRIPTION OF EXCHANGE NOTES

GENERAL

         The Old Notes were issued and the Exchange Notes will be issued
pursuant to the Indenture (the "Indenture") among the Company, the Initial
Restricted Subsidiary and Texas Commerce Bank, National Association, as trustee
(the "Trustee").  The terms of the Notes include those stated in the Indenture
and the Pledge Agreement and those made part of the Indenture and the Pledge
Agreement by reference to the Trust Indenture Act of 1939, as amended (the
"Trust Indenture Act"). The Notes are subject to all such terms, and holders
("Holders") of Notes are referred to the Indenture and the Trust Indenture Act
for a statement thereof. The following summary of certain provisions of the
Indenture and the Pledge Agreement does not purport to be complete and is
qualified in its entirety by reference to the Indenture and the Pledge
Agreement, including the definitions therein of certain terms used below. A
copy of the Indenture and Pledge Agreement is available as set forth under "--
Additional Information." The definitions of certain terms used in the following
summary are set forth below under "-- Certain Definitions." For purposes of
this Section, references to the "Company" shall mean HighwayMaster
Communications, Inc., excluding its Subsidiaries.

         The obligations of the Company under the Old Notes are and under the
Exchange Notes will be jointly and severally guaranteed by the Company's
Restricted Subsidiaries. See "-- Subsidiary Guarantees." As of the date of this
Prospectus, the Company's only Subsidiary, HighwayMaster Corporation, a
Delaware corporation (the "Initial Restricted Subsidiary"), is a Restricted
Subsidiary.

         Under certain circumstances, the Company will be able to designate
current or future Subsidiaries as Unrestricted Subsidiaries. Unrestricted
Subsidiaries will not guarantee the Exchange Notes and will not be subject to
many of the restrictive covenants set forth in the Indenture.

         The form and terms of the Exchange Notes are the same as the form and
terms of the Old Notes (which they replace) except that (i) the Exchange Notes
bear a Series B designation, (ii) the Exchange Notes have been registered under
the Securities Act and, therefore, will not bear legends restricting the
transfer thereof, and (iii) the holders of Exchange Notes will not be entitled
to certain rights under the Registration Rights Agreement, including the
provisions providing for an increase in the interest rate on the Old Notes in
certain circumstances relating to the timing of the Exchange Offer, which
rights will terminate when the Exchange Offer is consummated.  The Exchange
Notes will be issued solely in exchange for an equal principal amount of Old
Notes.  As of the date hereof, $125.0 million aggregate principal amount of Old
Notes is outstanding.  See "The Exchange Offer."

RANKING

         The Exchange Notes will be senior obligations of the Company, will
rank pari passu in right of payment with all existing and future unsecured
senior Indebtedness of the Company and will rank senior in right of payment to
any Subordinated Indebtedness of the Company. The Subsidiary Guarantee of each
Restricted Subsidiary will be an unsecured, senior obligation of such
Restricted Subsidiary, will rank pari passu in right of payment with all
existing and future unsecured senior Indebtedness of such Restricted Subsidiary
and will rank senior in right of payment to any Subordinated Indebtedness of
such Restricted Subsidiary.  As of June 30, 1997, after giving effect to the
Units Offering, the aggregate principal amount of outstanding senior
Indebtedness and other senior liabilities of the Company was $125.0 million
($120.8 million net of debt discount). As of June 30, 1997, the aggregate
principal amount of outstanding senior Indebtedness and other senior
liabilities (including trade payables) of the Initial Restricted Subsidiary,
but excluding the Subsidiary Guarantee, was approximately $9.2 million.

SECURITY

         The Indenture provided that on the date of the closing of the Units
Offering, the Company shall purchase and pledge to the Trustee, for the benefit
of the Holders of the Notes, the Pledged Securities in such amount as will be


                                     92
<PAGE>   98
sufficient upon receipt of scheduled interest and principal payments of such
securities, in the opinion of a nationally recognized firm of independent
public accountants selected by the Company, to provide for payment in full when
due of the first six scheduled interest payments on the Notes. The Company used
approximately $46.6 million of the net proceeds of the Units Offering to
acquire the Pledged Securities.  The Pledged Securities are pledged by the
Company to the Trustee for the benefit of the Holders of the Notes pursuant to
the Pledge Agreement and secure the payment of the principal of and interest on
the Notes, Liquidated Damages, if any, and all other obligations under the
Indenture, to the extent of such security. The Pledged Securities and any
proceeds thereof are held by the Trustee in the Pledge Account. Pursuant to the
Pledge Agreement, immediately prior to an interest payment date on the Notes,
the Company may either deposit with the Trustee from funds otherwise available
to the Company cash sufficient to pay the interest scheduled to be paid on such
date or the Company may direct the Trustee to release from the Pledge Account
proceeds sufficient to pay the interest scheduled to be paid on such date. In
the event that the Company exercises the former option, the Pledge Agreement
provides that the Company may thereafter direct the Trustee to release to the
Company proceeds or Pledged Securities from the Pledge Account in a like
amount.

         Interest earned on the Pledged Securities will be added to the Pledge
Account. In the event that the funds or Pledged Securities held in the Pledge
Account exceed the amount sufficient, in the opinion of a nationally recognized
firm of independent public accountants selected by the Company, to provide for
payment in full of the first six scheduled interest payments due on the Notes
(or, in the event an interest payment or interest payments have been made, an
amount sufficient to provide for payment in full of any interest payments
remaining, up to and including the sixth scheduled interest payment), if no
Default or Event of Default is then continuing, the Trustee will be permitted
to release to the Company at its request any such excess amount.

         Under the Pledge Agreement, if the Company makes the first six
scheduled interest payments on the Notes in a timely manner and no Default or
Event of Default is then continuing, the remaining Pledged Securities, if any,
will be released from the Pledge Account and thereafter the Notes will be
unsecured.

SUBSIDIARY GUARANTEES

         The obligations of the Company under the Exchange Notes will be
jointly and severally guaranteed by the Restricted Subsidiaries. The Subsidiary
Guarantee of each Restricted Subsidiary will be an unsecured, senior obligation
of such Restricted Subsidiary, will rank pari passu in right of payment with
all existing and future unsecured senior Indebtedness of such Restricted
Subsidiary and will rank senior in right of payment to any Subordinated
Indebtedness of such Restricted Subsidiary. As of the date of this Prospectus,
the Initial Restricted Subsidiary will be the only Restricted Subsidiary.

         The Indenture contains provisions the intent of which is to provide
that the obligations of each Restricted Subsidiary will be limited to the
maximum amount that will, after giving effect to all other contingent and fixed
liabilities of such Restricted Subsidiary and after giving effect to any
collections from, rights to receive contribution from, or payments made by or
on behalf of any other Restricted Subsidiary in respect of the obligations of
such other Restricted Subsidiary under its Subsidiary Guarantee or pursuant to
its contribution obligations under the Indenture, result in the obligations of
such Restricted Subsidiary under its Subsidiary Guarantee not constituting a
fraudulent conveyance or fraudulent transfer under any applicable law. Each
Restricted Subsidiary that makes a payment or distribution under a Subsidiary
Guarantee shall be entitled to contribution from each other Restricted
Subsidiary so long as the exercise of such right does not impair the rights of
the Holders under the Subsidiary Guarantees. See "Risk Factors -- Fraudulent
Conveyance Considerations."

         The Indenture requires the Company to cause any Person that becomes a
Restricted Subsidiary (including any Subsidiary that was previously an
Unrestricted Subsidiary and which becomes a Restricted Subsidiary) after the
Closing Date to execute and deliver to the Trustee a supplemental indenture
pursuant to which such Restricted Subsidiary will Guarantee the Notes. So long
as no Default or Event of Default exists or would be caused thereby, any Person
that is





                                       93
<PAGE>   99
no longer a Restricted Subsidiary may, by execution and delivery to the Trustee
of a supplemental indenture satisfactory to the Trustee, be released from its
Subsidiary Guarantee and cease to Guarantee the Notes.

         Each Subsidiary Guarantee will be a continuing Guarantee and shall (i)
remain in full force and effect until released pursuant to the Indenture or
pursuant to payment in full of all the obligations under the Indenture and the
Notes, (ii) be binding upon such Restricted Subsidiary and (iii) inure to the
benefit of and be enforceable by the Holders and their successors, transferees
and assigns.

         The Indenture provides that, subject to the provisions described in
the next succeeding paragraph, no Restricted Subsidiary may consolidate or
merge with or into (whether or not such Restricted Subsidiary is the surviving
Person), or sell, assign, transfer, lease, convey or otherwise dispose of all
or substantially all of its properties or assets in one or more related
transactions, to another Person unless (i) the Person formed by or surviving
any such consolidation or merger (if other than such Restricted Subsidiary) or
the Person to which such sale, assignment, transfer, lease, conveyance or other
disposition shall have been made assumes all the obligations of such Restricted
Subsidiary under the Subsidiary Guarantee, in form satisfactory to the Trustee;
(ii) immediately after such transaction, no Default or Event of Default exists;
(iii) the Company and its Restricted Subsidiaries would, at the time of such
transaction and after giving pro forma effect thereto as if such transaction
had occurred at the beginning of the applicable fiscal quarter, be permitted to
Incur at least $1.00 of additional Indebtedness pursuant to the Leverage Ratio
test set forth in the first paragraph of the covenant described under the
caption "-- Certain Covenants -- Incurrence of Indebtedness"; (iv) the Company
shall have delivered to the Trustee an Officers' Certificate, and an Opinion of
Counsel, each stating that such consolidation, merger or transfer complies with
the Indenture; and (v) such Restricted Subsidiary (if such Restricted
Subsidiary is the surviving Person) shall have delivered a written instrument
in form satisfactory to the Trustee confirming its Subsidiary Guarantee after
giving effect to such consolidation, merger or transfer. Notwithstanding the
foregoing, any Restricted Subsidiary may merge into, consolidate with or
transfer all or part of its properties or assets to the Company or one or more
Restricted Subsidiaries.

         The Indenture provides that in the event of a sale, assignment,
transfer, lease, conveyance or other disposition of all of the Equity Interests
in, or all or substantially all of the assets of, a Restricted Subsidiary to
any Person that is not the Company or any of its Restricted Subsidiaries,
whether by way of merger, consolidation or otherwise, if (i) the Net Proceeds
of such sale or other disposition are applied in accordance with provisions of
the Indenture described under "-- Repurchase at the Option of Holders -- Asset
Sales," (ii) no Default or Event of Default exists or would exist under the
Indenture after giving effect to such transaction, (iii) all obligations of
such Restricted Subsidiary under any other Indebtedness of the Company or any
of its Restricted Subsidiaries shall have been terminated (including, without
limitation, all Guarantees of any such Indebtedness), (iv) all Liens on assets
of such Restricted Subsidiary that secure any other Indebtedness of the Company
or any of its Restricted Subsidiaries shall have been terminated, and (v) all
obligations of the Company and its Restricted Subsidiaries under other
Indebtedness of such Restricted Subsidiary shall have been terminated
(including, without limitation, all Guarantees of such Indebtedness), then (A)
in the case of such a sale or other disposition, whether by way of merger,
consolidation or otherwise, of all of the Equity Interests in such former
Restricted Subsidiary, such former Restricted Subsidiary will be released and
relieved of any obligations under its Subsidiary Guarantee, or (B) in the case
of a sale or other disposition of all or substantially all of the assets of
such Restricted Subsidiary, the Person acquiring such assets will not be
required to assume the obligations of such Restricted Subsidiary under its
Subsidiary Guarantee.





                                       94
<PAGE>   100
PRINCIPAL, MATURITY AND INTEREST

         The Exchange Notes will be limited in aggregate principal amount to
$125 million and will mature on September 15, 2005. Interest on the Exchange
Notes will accrue at the rate of 13 3/4% per annum and will be payable semi-
annually in arrears on March 15 and September 15 of each year, commencing on
March 15, 1998, to Holders of record on the immediately preceding March 1 and
September 1. Interest on the Exchange Notes will accrue from the most recent
date to which interest has been paid or, if no interest has been paid, from
September 23, 1997.  Interest will be computed on the basis of a 360-day year
comprised of twelve 30-day months. Principal of and premium, if any, interest
and Liquidated Damages, if any, on the Exchange Notes will be payable by wire
transfer of immediately available funds to the holder of the Global Note (as
defined herein) and with respect to holders of Certificated Notes (as defined
herein), at the office or agency of the Company maintained for such purpose or,
at the option of the Company, payment of interest and Liquidated Damages, if
any, may be made by check mailed to the Holders of the Exchange Notes at their
respective addresses set forth in the register of Holders of the Exchange
Notes; provided that all payments with respect to Exchange Notes the Holders of
which have given wire transfer instructions to the Company will be required to
be made by wire transfer of immediately available funds to the accounts
specified by the Holders thereof. Until otherwise designated by the Company,
the Company's office or agency will be the office of the Trustee maintained for
such purpose.  The Exchange Notes will be issued in denominations of $1,000 and
integral multiples thereof.

OPTIONAL REDEMPTION

         The Notes are not redeemable at the Company's option prior to
September 15, 2001. Thereafter, the Notes will be subject to redemption at the
option of the Company, in whole or in part, upon not less than 30 nor more than
60 days' notice, at the redemption prices (expressed as percentages of
principal amount) set forth below, plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the applicable redemption date, if
redeemed during the twelve-month period beginning on September 15 of the years
indicated below:

<TABLE>
<CAPTION>
                    YEAR                                  PERCENTAGE
                    ----                                  ----------
              <S>                                          <C>
              2001  . . . . . . . . . . . . . . . . .      110.313%
              2002  . . . . . . . . . . . . . . . . .      106.875%
              2003  . . . . . . . . . . . . . . . . .      103.438%
              2004 and thereafter . . . . . . . . . .      100.000%
</TABLE>

         Notwithstanding the foregoing, on or prior to September 15, 2000, the
Company may, at its option, redeem, from time to time, up to 35% in aggregate
principal amount of the Notes at a redemption price of 113.75% of the principal
amount thereof, plus accrued and unpaid interest and Liquidated Damages, if
any, thereon to the redemption date with the net proceeds of an Equity
Investment; provided that no less than 65% of the aggregate principal amount of
Notes initially issued remains outstanding immediately after giving effect to
such redemption; and provided, further, that notice of such redemption shall
have been given not later than 30 days, and such redemption shall occur not
later than 90 days, after the date of the closing of the transaction giving
rise to such Equity Investment.

SELECTION AND NOTICE

         If less than all of the Notes are to be redeemed at any time,
selection of Notes for redemption will be made by the Trustee in compliance
with the requirements of the principal national securities exchange, if any, on
which the Notes are listed, or, if the Notes are not so listed, on a pro rata
basis, by lot or by such method as the Trustee shall deem fair and appropriate;
provided that no Notes of $1,000 or less shall be redeemed in part. Notices of
redemption shall be mailed by first class mail 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. If any Note is to be redeemed in part only, the notice of
redemption that relates to such Note shall state the portion of the principal
amount thereof to be redeemed. A new Note in principal amount





                                       95
<PAGE>   101
equal to the unredeemed portion thereof will be issued in the name of the
Holder thereof upon cancellation of the original Note. On and after the
redemption date, interest ceases to accrue on Notes or portions thereof called
for redemption.

MANDATORY REDEMPTION

         Except as set forth below under "-- Repurchase at the Option of
Holders," the Company is not required to repurchase the Exchange Notes or make
mandatory redemption or sinking fund payments with respect thereto.

REPURCHASE AT THE OPTION OF HOLDERS

         Change of Control. Upon the occurrence of a Change of Control, the
Company will be required to make an offer (a "Change of Control Offer") to
repurchase all or any part (equal to $1,000 or an integral multiple thereof) of
each Holder's Notes, at an offer price in cash equal to 101% of the aggregate
principal amount thereof, plus accrued and unpaid interest and Liquidated
Damages, if any, thereon, to the date of repurchase (the "Change of Control
Payment").  Within 20 days following any Change of Control, the Company will
mail a notice to each Holder describing the transaction that constitutes the
Change of Control and offering to repurchase Notes pursuant to the procedures
required by the Indenture and described in such notice. The Company will comply
with the requirements of Rule 14e-1 under the Exchange Act and any other
securities laws and regulations thereunder to the extent such laws and
regulations are applicable in connection with the repurchase of the Notes as a
result of a Change of Control.

         On a date that is at least 30 but no more than 60 days from the date
on which the Company mails notice of the Change of Control (the "Change of
Control Payment Date"), the Company will, to the extent lawful, (i) accept for
payment all Notes or portions thereof properly tendered pursuant to the Change
of Control Offer, (ii) deposit with the Trustee an amount equal to the Change
of Control Payment in respect of all Notes or portions thereof so tendered and
(iii) deliver or cause to be delivered to the Trustee the Notes so accepted
together with an Officers' Certificate stating the aggregate principal amount
of Notes or portions thereof being purchased by the Company. The Trustee will
promptly mail to each Holder of Notes so tendered the Change of Control Payment
for such Notes, and the Trustee will promptly authenticate and mail (or cause
to be transferred by book entry) to each Holder a new Note equal in principal
amount to any unpurchased portion of the Notes surrendered, if any; provided
that each such new Note will be in a principal amount of $1,000 or an integral
multiple thereof. The Company will publicly announce the results of the Change
of Control Offer on or as soon as practicable after the Change of Control
Payment Date. Unless the Company defaults in the payment for any Notes properly
tendered pursuant to the Change of Control Offer, any Notes accepted for
payment pursuant to the Change of Control Offer shall cease to accrue interest
after the Change of Control Payment Date.

         The Change of Control provisions described above will be applicable
whether or not any other provisions of the Indenture are applicable.

         Subject to the limitations discussed below, the Company could in the
future enter into certain transactions, including acquisitions, refinancings or
other recapitalizations, that would not constitute a Change of Control under
the Indenture, but that could increase the amount of Indebtedness outstanding
at such time or otherwise affect the Company's capital structure or credit
rating. The occurrence of a Change of Control, or the exercise by the Holders
of Notes of their right to require the Company to repurchase the Notes upon a
Change of Control, could cause a default under other senior Indebtedness of the
Company. The Company's ability to pay cash to the Holders of Notes upon a
Change of Control may be limited by the Company's then existing financial
resources. There can be no assurance that sufficient funds will be available
when necessary to make any required repurchases. The failure of the Company to
purchase any Notes tendered in a Change of Control Offer will constitute an
Event of Default under the Indenture. See "-- Events of Default and Remedies."

         The Company will not be required to make a Change of Control Offer
upon a Change of Control if a third party makes the Change of Control Offer in
the manner, at the times and otherwise in compliance with the requirements set





                                       96
<PAGE>   102
forth in the Indenture applicable to a Change of Control Offer made by the
Company and purchases all Notes validly tendered and not withdrawn under such
Change of Control Offer.

         "Change of Control" means the occurrence of any of the following: (i)
the sale, lease, transfer, conveyance or other disposition (other than by way
of merger or consolidation), in one or a series of related transactions, of all
or substantially all of the assets of the Company and its Restricted
Subsidiaries taken as a whole to any "person" (as such term is used in Section
13(d)(3) of the Exchange Act) other than a Restricted Subsidiary; (ii) the
adoption of a plan relating to the liquidation or dissolution of the Company;
(iii) the consummation of any transaction (including, without limitation, any
merger or consolidation) the result of which is that any "person" (as defined
above), other than a Permitted Holder, becomes the "beneficial owner" (as such
term is defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act), directly
or indirectly, of a greater percentage of the voting stock of the Company than
the percentage of the voting stock of the Company held by the Permitted
Holders; (iv) the first day on which the Permitted Holders in the aggregate
hold less than 35% of the voting stock of the Company; or (v) the first day on
which a majority of the members of the Board of Directors of the Company are
not Continuing Directors.

         The definition of Change of Control includes a phrase relating to the
sale, lease, transfer, conveyance or other disposition of "all or substantially
all" of the assets of the Company and its Restricted Subsidiaries taken as a
whole. Although there is a developing body of case law interpreting the phrase
"substantially all," there is no precise established definition of the phrase
under applicable law. Accordingly, the ability of a Holder of Notes to require
the Company to repurchase such Notes as a result of a sale, lease, transfer,
conveyance or other disposition of less than all of the assets of the Company
and its Restricted Subsidiaries taken as a whole to another Person or group may
be uncertain.

         "Continuing Director" means, as of any date of determination, any
member of the Board of Directors of the Company who (i) was a member of such
Board of Directors on the date of the Indenture, (ii) was nominated for
election or elected to such Board of Directors with the approval of a majority
of the Continuing Directors who were members of such Board of Directors at the
time of such nomination of election, or (iii) was designated pursuant to the
Stockholders' Agreement to be a member of the Board of Directors by a
stockholder of the Company who was a party to the Stockholders' Agreement as of
the Closing Date if such designation bound all parties to the Stockholders'
Agreement to take all action necessary to cause such individual to be elected
to such Board of Directors.

         Asset Sales. The Indenture provides that the Company will not, and
will not permit any of its Restricted Subsidiaries to, engage in an Asset Sale
unless (i) the Company or such Restricted Subsidiary, as the case may be,
receives consideration at the time of such Asset Sale at least equal to the
Fair Market Value (which, if it exceeds $1 million, shall be determined by, and
set forth in, a resolution of the Board of Directors of the Company and
described in an Officers' Certificate of the Company delivered to the Trustee)
of the assets (including, if appropriate, Equity Interests) disposed of or
issued, as appropriate, and (ii) at least 75% of the consideration therefor
received by the Company or such Restricted Subsidiary is in the form of cash or
Cash Equivalents. For purposes of this covenant (and not for purposes of any
other provision of the Indenture), the term "cash" shall be deemed to include
(i) any notes or other obligations received by the Company or such Restricted
Subsidiary as consideration as part of such Asset Sale that are immediately
converted by the Company or such Restricted Subsidiary into actual cash (to the
extent of the actual cash so received), and (ii) any liabilities of the Company
or such Restricted Subsidiary (as shown on the most recent balance sheet of the
Company or such Restricted Subsidiary) that (A) are assumed by the transferee
of the assets which are the subject of such Asset Sale as consideration
therefor in a transaction the result of which is that the Company and all of
its Subsidiaries are released from all liability for such assumed liability,
(B) are not by their terms subordinated in right of payment to the Notes, (C)
are not owed to the Company or any Subsidiary of the Company, and (D)
constitute short-term liabilities (as determined in accordance with GAAP).

         Within 360 days after the receipt of any Net Proceeds from an Asset
Sale, the Company may apply, directly or indirectly, such Net Proceeds (a) to
permanently reduce Indebtedness under the Bank Credit Agreement (and to
correspondingly reduce commitments with respect thereto) or (b) to invest in
Telecommunications Assets, which may include working capital requirements.
Pending the final application of any such Net Proceeds, the Company may





                                       97
<PAGE>   103
temporarily invest such Net Proceeds in any manner that is not prohibited by
the Indenture (including, without limitation, to the reduction of Indebtedness
under the Bank Credit Agreement). Any Net Proceeds from Asset Sales that are
not applied or invested as provided in the first sentence of this paragraph
will be deemed to constitute "Excess Proceeds." When the aggregate amount of
Excess Proceeds exceeds $5 million, the Company will be required to make an
offer to all Holders of Notes and, if the Company is required to do so under
the terms of any other senior Indebtedness, to the holders of such other senior
Indebtedness (an "Asset Sale Offer") to purchase Notes and principal of such
other senior Indebtedness, on a pro rata basis, having an aggregate principal
amount equal to the Excess Proceeds, at an offer price in cash equal to, in the
case of the Notes, 100% of the principal amount thereof, plus accrued and
unpaid interest and Liquidated Damages, if any, thereon to the date of
purchase, and, in the case of all other senior Indebtedness, 100% of the
principal amount thereof, plus accrued and unpaid interest, or premium, if any,
thereon to the date of purchase, in accordance with the procedures set forth in
the Indenture. To the extent that the aggregate principal amount of Notes
tendered pursuant to an Asset Sale Offer is less than the Excess Proceeds, the
Company may use any remaining Excess Proceeds for general corporate purposes
(subject to the restrictions of the Indenture). If the aggregate principal
amount of Notes and such other senior Indebtedness surrendered by holders
thereof exceeds the amount of Excess Proceeds, the Trustee shall select the
Notes to be purchased in compliance with the requirements of the principal
national securities exchange, if any, on which the Notes are listed or, if the
Notes are not so listed, on a pro rata basis with such other senior
Indebtedness based on the outstanding principal amounts thereof (with such
adjustments as may be deemed appropriate by the Company so that only Notes with
denominations of $1,000 or integral multiples thereof shall be purchased). Upon
completion of such offer to purchase, the amount of Excess Proceeds shall be
reset at zero.

         The Indenture provides that the Company will not, and will not permit
any of its Restricted Subsidiaries to, transfer, convey, sell, lease or
otherwise dispose of any Capital Stock of any Restricted Subsidiary of the
Company to any Person (other than the Company or a Wholly Owned Restricted
Subsidiary of the Company), unless (i) such transfer, conveyance, sale, lease
or other disposition is of all of the Capital Stock of such Restricted
Subsidiary owned by the Company and its Restricted Subsidiaries or is otherwise
permitted under the covenant described under the caption "-- Certain Covenants
- -- Limitation on Issuance, Sale and Ownership of Capital Stock of Restricted
Subsidiaries" and (ii) such transaction is conducted in accordance with the
covenant described in the preceding two paragraphs.

         The Company will comply with the requirements of Rule 14e-1 under the
Exchange Act and any other securities laws and regulations thereunder to the
extent such laws and regulations are applicable in connection with the
repurchase of Notes using Excess Proceeds.

CERTAIN COVENANTS

         Restricted Payments. The Indenture provides that the Company will not,
and will not permit any of its Restricted Subsidiaries to, directly or
indirectly, (i) declare or pay any dividend or make any other payment or
distribution on account of the Company's or any Restricted Subsidiary's Equity
Interests (including, without limitation, any payment in connection with any
merger or consolidation) other than dividends or distributions (a) paid or
payable in Equity Interests (other than Disqualified Stock) of the Company or
(b) paid or payable to the Company or any Wholly Owned Restricted Subsidiary of
the Company; (ii) purchase, redeem or otherwise acquire or retire for value any
Equity Interests of the Company or any direct or indirect parent of the Company
or other Affiliate of the Company or any Restricted Subsidiary of the Company
(other than any such Equity Interests owned by the Company or any Wholly Owned
Restricted Subsidiary of the Company); (iii) make any principal payment on, or
purchase, redeem, defease or otherwise acquire or retire for value prior to the
scheduled maturity, scheduled repayment or scheduled sinking fund payment, any
Subordinated Indebtedness (except, if no Default or Event of Default is
continuing or would result therefrom, any such payment, purchase, redemption,
defeasance or other acquisition or retirement for value made (a) out of Excess
Proceeds available for general corporate purposes if (1) such payment or other
action is required by the indenture or other agreement or instrument pursuant
to which such Subordinated Indebtedness was issued and (2) the Company has
purchased all Notes and other senior Indebtedness properly tendered pursuant to
an Asset Sale Offer required under "-- Repurchase at the Option of Holders --
Asset Sales" or (b) upon the occurrence of a Change of





                                       98
<PAGE>   104
Control if (1) such payment or other action is required by the indenture or
other agreement or instrument pursuant to which such Subordinated Indebtedness
was issued and (2) the Company has purchased all Notes properly tendered
pursuant to the Change of Control Offer resulting from such Change of Control);
or (iv) make any Restricted Investment (all such payments and other actions set
forth in clauses (i) through (iv) above being collectively referred to as
"Restricted Payments"), unless, at the time of and after giving effect to such
Restricted Payment:

                 (a) no Default or Event of Default shall have occurred and be
         continuing or would occur as a consequence thereof;

                 (b) the Company would, at the time of such Restricted Payment
         and after giving pro forma effect thereto as if such Restricted
         Payment had been made at the beginning of the applicable fiscal
         quarter, have been permitted to Incur at least $1.00 of additional
         Indebtedness pursuant to the Leverage Ratio test set forth in the
         first paragraph of the covenant described under the caption "--
         Incurrence of Indebtedness;" and

                 (c) such Restricted Payment, together with the aggregate
         amount of all other Restricted Payments declared or made by the
         Company and its Restricted Subsidiaries after the Closing Date shall
         not exceed, at the date of determination, the sum of (1) 50% of
         aggregate Consolidated Net Income of the Company from the beginning of
         the first fiscal quarter commencing after the Closing Date to the end
         of the Company's most recently ended fiscal quarter for which
         financial statements are available at the time of such Restricted
         Payment (or, if such aggregate Consolidated Net Income for such period
         is a deficit, less 100% of such deficit), plus (2) 100% of the
         aggregate net cash proceeds received by the Company from the issue or
         sale after the Closing Date of Equity Interests of the Company or of
         Disqualified Stock or debt securities of the Company that have been
         converted into such Equity Interests (other than Equity Interests (or
         Disqualified Stock or convertible debt securities) sold to a
         Subsidiary of the Company and other than Disqualified Stock or debt
         securities that have been converted into Disqualified Stock), plus (3)
         the aggregate net cash proceeds received by the Company as capital
         contributions to the Company (other than from a Subsidiary of the
         Company) after the Closing Date, plus (4) if any Restricted Investment
         that was made after the Closing Date is sold for cash, to the extent
         such amount is not included in the Consolidated Net Income of the
         Company, the lesser of (A) the Net Proceeds from such sale to the
         extent received by the Company or any Restricted Subsidiary, and (B)
         the initial amount of such Restricted Investment, plus (5) in the
         event an Unrestricted Subsidiary is redesignated as a Restricted
         Subsidiary, an amount equal to the lesser of (A) the book value of
         such Unrestricted Subsidiary, and (B) the Fair Market Value of such
         Unrestricted Subsidiary.

         The foregoing provisions will not prohibit the following Restricted
Payments: (i) the payment of any dividend or other distribution within 60 days
after the date of declaration thereof, if at said date of declaration such
payment would have complied with the provisions of the Indenture; (ii) the
redemption, repurchase, retirement or other acquisition of any Equity Interests
of the Company (other than Disqualified Stock) in exchange for, or out of the
proceeds of, the substantially concurrent sale (other than to a Subsidiary of
the Company) of other Equity Interests of the Company (other than Disqualified
Stock); provided that the amount of any such net cash proceeds that are
utilized for any such redemption, repurchase, retirement or other acquisition
shall be excluded from clause (c) of the preceding paragraph (both for purposes
of determining the aggregate amount of Restricted Payments made and for
purposes of determining the aggregate amount of Restricted Payments permitted);
(iii) the payment, purchase, redemption, defeasance or other acquisition or
retirement for value of Subordinated Indebtedness with the net cash proceeds
from a substantially concurrent Incurrence of Permitted Refinancing
Indebtedness or the substantially concurrent sale (other than to a Subsidiary
of the Company) of Equity Interests of the Company (other than Disqualified
Stock); provided that the amount of any such net cash proceeds that are
utilized for any such payment, purchase, redemption, defeasance or other
acquisition or retirement shall be excluded from clause (c) of the preceding
paragraph (both for purposes of determining the aggregate amount of Restricted
Payments made and for purposes of determining the aggregate amount of
Restricted Payments permitted); (iv) so long as no Default or Event of Default
is continuing, the repurchase of Equity Interests of the Company from former
employees of the Company or any Restricted Subsidiary thereof (or the estates,
heirs or legatees of such former employees) for consideration which does not
exceed $3 million in the aggregate in any





                                       99
<PAGE>   105
fiscal year; (v) so long as no Default or Event of Default is continuing, loans
made to current officers, directors and employees of the Company or any
Restricted Subsidiary thereof in an aggregate principal amount at any one time
outstanding not to exceed $3 million; (vi) any Restricted Investment made with
the net cash proceeds from a substantially concurrent sale (other than to a
Subsidiary of the Company) of Equity Interests of the Company (other than
Disqualified Stock); and (vii) Permitted Telecommunications Investments in an
aggregate amount not to exceed $15 million at any one time outstanding (the
amount of any such Restricted Payment being the amount thereof on the date such
Restricted Payment is made). Except to the extent specifically noted above,
Restricted Payments made pursuant to this paragraph shall be included in
calculating the amount of Restricted Payments made after the Closing Date.

         The Board of Directors of the Company may designate any Restricted
Subsidiary to be an Unrestricted Subsidiary if (i) such designation would not
cause a Default or Event of Default, (ii) at the time of and after giving
effect to such designation, the Company could incur $1.00 of additional
Indebtedness pursuant to the Leverage Ratio test set forth in the first
paragraph of the covenant entitled "-- Incurrence of Indebtedness," and (iii)
each of the other requirements of the definition of the term "Unrestricted
Subsidiary" are satisfied. For purposes of making such determination, all
outstanding Investments by the Company and its Restricted Subsidiaries (except
to the extent repaid in cash) in the Subsidiary so designated will be deemed to
be Restricted Payments at the time of such designation and will reduce the
amount available for Restricted Payments under the first paragraph of this
covenant. All such outstanding Investments will be deemed to constitute
Restricted Payments in an amount equal to the greater of (i) the net book value
of such Investments at the time of such designation and (ii) the Fair Market
Value of such Investments at the time of such designation. Such designation
will only be permitted if such Restricted Payment would be permitted at such
time and if such Restricted Subsidiary otherwise meets the definition of an
Unrestricted Subsidiary. Upon being so designated as an Unrestricted
Subsidiary, any Subsidiary Guarantee that was previously executed by such
Unrestricted Subsidiary shall be deemed terminated.

         The amount of all Restricted Payments not made in cash shall be the
Fair Market Value (which, if it exceeds $1 million, shall be determined by, and
set forth in, a resolution of the Board of Directors of the Company and
described in an Officers' Certificate delivered to the Trustee) on the date of
the Restricted Payment of the asset(s) proposed to be transferred by the
Company or any Restricted Subsidiary, as the case may be, pursuant to the
Restricted Payment. Not later than the date of making any Restricted Payment,
the Company shall deliver to the Trustee an Officers' Certificate stating that
such Restricted Payments during such quarter were permitted and setting forth
the basis upon which the calculations required by the covenant described under
"-- Restricted Payments" were computed, which calculations may be based upon
the Company's latest available financial statements.

         Incurrence of Indebtedness. The Indenture provides that the Company
will not, and will not permit any of its Restricted Subsidiaries to, directly
or indirectly, Incur any Indebtedness (including Acquired Indebtedness), except
for Permitted Indebtedness; provided, however, that the Company and its
Restricted Subsidiaries may Incur Indebtedness (including Acquired
Indebtedness) if, at the time of Incurrence of such Indebtedness, after giving
pro forma effect to such Incurrence as of such date and to the use of proceeds
therefrom (including the application or the use of the net proceeds therefrom
to repay Indebtedness or make any Restricted Payment) as if the same had
occurred at the beginning of the most recently ended full fiscal quarter of the
Company for which internal financial statements are available, the Company's
Leverage Ratio would have been greater than zero but no greater than 5.5 to 1.

         "Permitted Indebtedness" means any and all of the following:

                 (i) Indebtedness of the Company and its Restricted
         Subsidiaries pursuant to the Bank Credit Agreement (including all
         Guarantees thereof) in an aggregate amount not to exceed the greater
         of (A) $15 million and (B) the sum of 60% of Eligible Inventory plus
         85% of Eligible Receivables, in each case at any one time outstanding;

                 (ii) Indebtedness represented by the Notes, the Indenture, the
         Subsidiary Guarantees and the Pledge Agreement;





                                      100
<PAGE>   106
                 (iii) intercompany Indebtedness between or among the Company
         and any of its Restricted Subsidiaries; provided that (A) if the
         Company is an obligor on such Indebtedness, such Indebtedness is
         expressly subordinate to the payment in full of all Obligations with
         respect to the Notes and (B) any subsequent issuance or transfer of
         Equity Interests that results in any such Indebtedness being held by a
         Person other than the Company or a Restricted Subsidiary of the
         Company, or any sale or other transfer of any such Indebtedness to a
         Person that is not either the Company or a Restricted Subsidiary of
         the Company, shall be deemed to constitute a new Incurrence of such
         Indebtedness by the Company or such Restricted Subsidiary, as the case
         may be;

                 (iv) Permitted Refinancing Indebtedness Incurred in exchange
         for, or the net proceeds of which are used to extend, refinance,
         renew, replace, defease or refund, (A) Indebtedness (other than
         Permitted Indebtedness) that was Incurred in compliance with the
         Indenture, (B) Indebtedness referred to in clause (ii) of the
         definition of the term "Permitted Indebtedness," or (C) Existing
         Indebtedness;

                 (v) Indebtedness of a Restricted Subsidiary of the Company
         constituting a Guarantee of Indebtedness of the Company or a
         Restricted Subsidiary which Indebtedness was Incurred pursuant to this
         definition or the Leverage Ratio test set forth in the first paragraph
         of the covenant described under the caption "-- Incurrence of
         Indebtedness;"

                 (vi) Hedging Obligations of the following types: (A) Interest
         Rate Hedges the notional principal amount of which does not exceed the
         principal amount of the Indebtedness to which such Interest Rate Hedge
         relates, and (B) Currency Hedges that do not increase the outstanding
         loss potential or liabilities other than as a result of fluctuations
         in foreign currency exchange rates;

                 (vii) (1) Capital Lease Obligations in an aggregate amount at
         any one time outstanding not to exceed an amount equal to (A) $15
         million minus (B) the aggregate outstanding amount of Attributable
         Debt (other than Capital Lease Obligations) Incurred in connection
         with sale and leaseback transactions in reliance on clause (a)(i)(2)
         of the covenant described under "-- Sale and Leaseback Transactions"
         and in compliance therewith, and (2) Indebtedness constituting a
         Guarantee by the Company or any Restricted Subsidiary of any Capital
         Lease Obligations and Attributable Debt of the types described in
         clause (1) under which such Person is the lessee;

                 (viii) Indebtedness (in addition to Indebtedness permitted by
         any other clause of this paragraph) in an aggregate principal amount
         at any time outstanding not to exceed $25 million; and

                 (ix) Existing Indebtedness.

         For purposes of determining compliance with the covenant entitled
"Incurrence of Indebtedness," (i) in the event that an item of Indebtedness
meets the criteria of more than one of the types of Indebtedness described
herein, the Company, in its sole discretion, will classify such item of
Indebtedness and only be required to include the amount and type of such
Indebtedness in one of the above clauses and (ii) an item of Indebtedness may
be divided and classified in more than one of the types of Indebtedness
described herein.

         Liens. The Indenture provides that the Company will not, and will not
permit any of its Restricted Subsidiaries to, directly or indirectly, create,
incur, affirm, assume or suffer to exist any Lien of any kind on any property
now owned or hereafter acquired, or any income or profits therefrom or assign
or convey any right to receive income therefrom, unless (i) in the case of
Liens securing obligations subordinate to the Notes, the Notes are secured by a
valid, perfected Lien on such property that is senior in priority to such
Liens, (ii) in the case of Liens securing obligations subordinate to a
Subsidiary Guarantee, such Subsidiary Guarantee is secured by a valid,
perfected Lien on such property that is senior in priority to such Liens, and
(iii) in all other cases, the Notes (and, if such Lien secures obligations of a
Restricted





                                      101
<PAGE>   107
Subsidiary, a Subsidiary Guarantee of such Restricted Subsidiary) are equally
and ratably secured; provided, however, that the foregoing shall not prohibit
or restrict Permitted Liens.

         Dividend and Other Payment Restrictions Affecting Subsidiaries. The
Indenture provides that the Company will not, and will not permit any of its
Restricted Subsidiaries to, directly or indirectly, create or otherwise cause
or suffer to exist or become effective any consensual encumbrance or
restriction on the ability of any Restricted Subsidiary to (i)(a) pay dividends
or make any other distributions to the Company or any of its Restricted
Subsidiaries on its Capital Stock or with respect to any other interest or
participation in, or measured by, its profits or (b) pay any Indebtedness owed
to the Company or any of its Restricted Subsidiaries, (ii) make loans or
advances to the Company or any of its Restricted Subsidiaries, (iii) transfer
any of its properties to the Company or any of its Restricted Subsidiaries,
(iv) grant any Liens in favor of the Holders of the Notes and the Trustee or
(v) guarantee the Notes or any renewals or refinancings thereof, except for
such encumbrances or restrictions existing under or by reason of (A) Existing
Indebtedness, (B) the Bank Credit Agreement, (C) applicable law, (D) any
instrument governing Indebtedness or Capital Stock of a Person acquired by the
Company or any of its Restricted Subsidiaries as in effect at the time of such
acquisition (except to the extent such Indebtedness was Incurred in connection
with or in contemplation of such acquisition), which encumbrance or restriction
is not applicable to any Person, or the properties of any Person, other than
the Person, or the property of the Person, so acquired, provided that in the
case of Indebtedness, such Indebtedness was permitted by the terms of the
Indenture to be Incurred, (E) customary non-assignment provisions in leases,
licenses, sales agreements or other contracts (but excluding contracts related
to the extension of credit) entered into in the ordinary course of business and
consistent with past practices, (F) restrictions imposed pursuant to a binding
agreement for the sale or disposition of all or substantially all of the Equity
Interests or assets of any Restricted Subsidiary, provided such restrictions
apply solely to the Equity Interests or assets being sold, (G) restrictions
imposed by Permitted Liens on the transfer of the assets that are subject to
such Liens, and (H) Permitted Refinancing Indebtedness Incurred to refinance
Existing Indebtedness or Indebtedness of the type described in clause (D)
above, provided that the restrictions contained in the agreements governing
such Permitted Refinancing Indebtedness are no more restrictive, as a whole,
than those contained in the agreements governing the Indebtedness being
refinanced.

         Limitation on Issuance, Sale and Ownership of Capital Stock of
Restricted Subsidiaries. The Indenture provides that the Company will not, and
will not permit any Restricted Subsidiary to (i) sell, assign, transfer, convey
or otherwise dispose of, any Equity Interests of any Restricted Subsidiary,
other than to the Company or a Wholly Owned Restricted Subsidiary, (ii) permit
any Restricted Subsidiary to issue any Equity Interests (including, without
limitation, pursuant to any merger, consolidation, recapitalization or similar
transaction) other than to the Company or a Wholly Owned Restricted Subsidiary
or (iii) permit any Person other than the Company or a Wholly Owned Restricted
Subsidiary to own any Equity Interests of any Restricted Subsidiary, except for
(A) a sale to a Person of all of the Equity Interests of a Restricted
Subsidiary, which sale was made by the Company or a Restricted Subsidiary
subject to, and in compliance with, the "Asset Sales" covenant, (B) the
issuance and subsequent ownership of directors' qualifying shares, and (C) the
issuance, sale and subsequent ownership of Capital Stock of a Restricted
Subsidiary if and only to the extent that (1) such Restricted Subsidiary is
organized under the laws of a jurisdiction other than the United States and
Canada and political subdivisions thereof (such other jurisdiction being a
"Foreign Jurisdiction"), (2) the laws of such Foreign Jurisdiction
unconditionally require, as a condition to such Restricted Subsidiary being
permitted to transact business in such Foreign Jurisdiction, that the
government of such Foreign Jurisdiction or individuals of such Foreign
Jurisdiction own such Capital Stock, (3) the government of such Foreign
Jurisdiction or individuals of such Foreign Jurisdiction, as appropriate, at
all times both legally and beneficially own such Capital Stock, and such
ownership satisfies the requirement described in clause (2) above, and (4) such
Restricted Subsidiary does not, directly or indirectly, conduct business in the
United States or Canada and does not, directly or indirectly, own or control
any properties or assets located in the United States or Canada.

         Merger, Consolidation, or Sale of Assets. The Indenture provides that
the Company may not consolidate or merge with or into (whether or not the
Company is the surviving entity), or sell, assign, transfer, lease, convey or
otherwise dispose of all or substantially all of its properties or assets in
one or more related transactions, to another Person, unless (i) the Company is
the surviving entity, or the Person formed by or surviving any such
consolidation or





                                      102
<PAGE>   108
merger (if other than the Company) or to which such sale, assignment, transfer,
lease, conveyance or other disposition shall have been made is a corporation
organized or existing under the laws of the United States, any state thereof or
the District of Columbia; (ii) the Person formed by or surviving any such
consolidation or merger (if other than the Company) or the Person to which such
sale, assignment, transfer, lease, conveyance or other disposition shall have
been made assumes all the obligations of the Company under the Notes and the
Indenture pursuant to a supplemental indenture in a form reasonably
satisfactory to the Trustee; (iii) immediately after giving effect to such
transaction, no Default or Event of Default exists or would exist; (iv) except
in the case of a merger of the Company with or into a Wholly Owned Restricted
Subsidiary of the Company, the Company or the Person formed by or surviving any
such consolidation or merger (if other than the Company) or to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made (A) will (treating any Indebtedness not previously an obligation of the
Company or any of its Restricted Subsidiaries as a result of such transaction
as having been Incurred at the time of such transaction) have Consolidated Net
Worth immediately after the transaction equal to or greater than the
Consolidated Net Worth of the Company immediately preceding the transaction and
(B) will, at the time of such transaction and after giving pro forma effect
thereto as if such transaction had occurred at the beginning of the applicable
fiscal quarter, be permitted to Incur at least $1.00 of additional Indebtedness
pursuant to the Leverage Ratio test set forth in the first paragraph of the
covenant described under the caption "-- Incurrence of Indebtedness;" and (v)
the Company shall have delivered to the Trustee an Officers' Certificate and an
opinion of counsel, each stating that such consolidation, merger or transfer
and such supplemental indenture (if any) comply with the Indenture. For
purposes of the foregoing, the transfer (by lease, assignment, sale or
otherwise, in a single transaction or series of transactions) of all or
substantially all of the properties or assets of one or more of the Restricted
Subsidiaries of the Company, the Capital Stock of which constitutes all or
substantially all of the properties and assets of the Company, shall be deemed
to be the transfer of all or substantially all of the properties and assets of
the Company. For restrictions on mergers, consolidations and disposition of
assets involving Restricted Subsidiaries, see "-- Subsidiary Guarantees."

         Transactions with Affiliates. The Indenture provides that the Company
will not, and will not permit any of its Restricted Subsidiaries to, make any
payment to, or sell, lease, transfer or otherwise dispose of any of its
properties or assets to, or purchase any property or assets from, or enter into
or make or amend any contract, agreement, understanding, loan, advance or
guarantee with, or for the benefit of, any Affiliate of the Company (other than
the Company or a Restricted Subsidiary), in one transaction or a series of
transactions (each of the foregoing an "Affiliate Transaction"), unless (i)
such Affiliate Transaction is on terms that are no less favorable to the
Company or the relevant Restricted Subsidiary than those that would have been
obtained in a comparable transaction with an unrelated Person and (ii) the
Company delivers to the Trustee (a) with respect to any Affiliate Transaction
or series of related Affiliate Transactions after the Closing Date involving
aggregate consideration in excess of $2 million, a resolution described in an
Officers' Certificate, certifying that such Affiliate Transaction complies with
clause (i) above and such Affiliate Transaction has been approved by a majority
of the disinterested members of the Board of Directors of the Company and (b)
with respect to any Affiliate Transaction or series of related Affiliate
Transactions after the Closing Date involving aggregate consideration in excess
of $10 million, an opinion as to the fairness to the Company of such Affiliate
Transaction from a financial point of view issued by an accounting, appraisal
or investment banking firm of recognized national standing; provided that the
following types of transactions shall not constitute Affiliate Transactions:
(1) any transaction with an officer or director of the Company or any
Restricted Subsidiary in connection with such individual's compensation
(including directors' fees), employee benefits, severance arrangements or
indemnification (to the extent consistent with applicable law and the charter
and bylaws of the Company or such Restricted Subsidiary), in each case entered
into by the Company or any of its Restricted Subsidiaries in the ordinary
course of business, (2) transactions between or among the Company and its
Restricted Subsidiaries, (3) Restricted Payments that are permitted by the
provisions of the covenant described under "-- Restricted Payments;" (4) the
consummation of the specific transactions described in the various documents
listed on Annex I to the Indenture, as such documents are in effect on the
Closing Date; (5) sales of Capital Stock of the Company made at prevailing
market rates; and (6) loans to officers, directors and employees of the Company
and its Restricted Subsidiaries made in the ordinary course of business in an
aggregate amount not to exceed $3 million at any one time outstanding.





                                      103
<PAGE>   109
         Sale and Leaseback Transactions. The Indenture provides that the
Company will not, and will not permit any of its Restricted Subsidiaries to,
enter into any sale and leaseback transaction; provided that the Company or any
Restricted Subsidiary may enter into a sale and leaseback transaction if (a)
the Company could have (i) Incurred Indebtedness in an amount equal to the
Attributable Debt relating to such sale and leaseback transaction pursuant to
either (1) the Leverage Ratio test set forth in the first paragraph of the
covenant described under "-- Incurrence of Indebtedness" or (2) clause (vii) of
the definition of the term "Permitted Indebtedness" and (ii) incurred a Lien to
secure such Indebtedness pursuant to the covenant described under "-- Liens,"
and (b) the sale portion of such sale and leaseback transaction complies with
the covenant described in "-- Repurchase at the Option of Holders -- Asset
Sales," and the net proceeds from such sale are applied in accordance with such
covenant.

         Business Activities. The Indenture provides that the Company will not,
and will not permit any of its Restricted Subsidiaries to, engage in any
business other than the Telecommunications Business.

         Payments for Consent. The Indenture provides that the Company will
not, and will not permit any of its Restricted Subsidiaries to, directly or
indirectly, pay or cause to be paid any consideration, whether by way of
interest, fee or otherwise, to any Holder of any Notes for or as an inducement
to any consent, waiver or amendment of any of the terms or provisions of the
Indenture, the Notes, the Pledge Agreement or the Subsidiary Guarantees unless
such consideration is offered to be paid or is paid to all Holders of the Notes
that so consent, waive or agree to amend in the time frame set forth in the
solicitation documents relating to such consent, waiver or agreement.

         Reports. The Indenture provides that, whether or not required by the
rules and regulations of the Commission, so long as any Notes are outstanding,
the Company will furnish to the Holders of Notes (i) all quarterly and annual
financial information that would be required to be contained in a filing with
the Commission on Forms 10-Q and 10-K if the Company were required to file such
Forms, including a "Management's Discussion and Analysis of Financial Condition
and Results of Operations" that describes the financial condition and results
of operations of the Company and its Subsidiaries and, with respect to the
annual information only, a report thereon by the Company's certified
independent accountants and (ii) all current reports that would be required to
be filed with the Commission on Form 8-K if the Company were required to file
such reports. In addition, whether or not required by the rules and regulations
of the Commission, the Company will file a copy of all such information and
reports with the Commission for public availability (unless the Commission will
not accept such a filing) and make such information available to securities
analysts and prospective investors upon request. In addition, the Company has
agreed that, for so long as any Notes remain outstanding, it will furnish to
the Holders and to securities analysts and prospective investors, upon their
request, the information required to be delivered pursuant to Rule 144A(d)(4)
under the Securities Act.

EVENTS OF DEFAULT AND REMEDIES

         The Indenture provides that each of the following constitutes an
"Event of Default": (i) default for 30 days in the payment when due of any
interest or Liquidated Damages payable with respect to the Notes at any time
(provided that such 30-day grace period shall be inapplicable for the first six
scheduled interest payments due on the Notes); (ii) default in payment when due
(whether at maturity, upon redemption or repurchase, or otherwise) of the
principal of or premium, if any, on the Notes; (iii) failure by the Company or
a Restricted Subsidiary to comply with the provisions described under "--
Security," "-- Subsidiary Guarantees," "-- Repurchase at the Option of Holders
- -- Change of Control," "-- Repurchase at the Option of Holders -- Asset Sales"
or "Certain Covenants -- Merger, Consolidation, or Sale of Assets;" (iv)
failure by the Company or any Restricted Subsidiary for 30 days after notice
from the Trustee or Holders of at least 25% in aggregate principal amount of
the Notes to the Company and the Trustee to comply with any of its other
agreements in the Indenture or the Notes; (v) default under any mortgage,
indenture or instrument under which there may be issued or by which there may
be secured or evidenced any Indebtedness for money borrowed by the Company or
any of its Restricted Subsidiaries (or the payment of which is Guaranteed by
the Company or any of its Restricted Subsidiaries), whether such Indebtedness
or Guarantee now exists or is created after the date of the Indenture, which
default (a) is caused by a failure to pay principal of or premium, if any, or
interest on such Indebtedness following the expiration of the grace period
provided in such Indebtedness on the date of such default (a





                                      104
<PAGE>   110
"Payment Default") or (b) results in the acceleration of such Indebtedness
(including any obligation to redeem or repurchase such Indebtedness) prior to
its express maturity and, in each case, the principal amount of any such
Indebtedness, together with the principal amount of any other such Indebtedness
under which there has been a Payment Default or the maturity of which has been
so accelerated, aggregates $5 million or more; (vi) failure by the Company or
any of its Restricted Subsidiaries to pay final non-appealable judgments
rendered against the Company or any of its Restricted Subsidiaries aggregating
in excess of $5 million, which judgments are not paid, discharged or stayed for
a period of 60 days after such judgments become final and non-appealable; (vii)
certain events of bankruptcy or insolvency with respect to the Company or any
Restricted Subsidiary; (viii) certain events of breach, default, repudiation or
unenforceability of the Pledge Agreement; and (ix) any Guarantee of the Notes
shall be held in a judicial proceeding to be unenforceable or invalid or shall
cease for any reason to be in full force and effect, or any Restricted
Subsidiary, or any Person acting on behalf of any Restricted Subsidiary, shall
deny or disaffirm its obligations under its Guarantee of any Notes.

         If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Notes may
declare all the Notes to be due and payable immediately. Notwithstanding the
foregoing, in the case of an Event of Default arising from certain events of
bankruptcy or insolvency with respect to the Company or any Restricted
Subsidiary of the Company, all outstanding Notes will become due and payable
without further action or notice by the Trustee or any Holder. Holders of the
Notes may not enforce the Indenture or the Notes except as provided in the
Indenture. Subject to certain limitations, Holders of a majority in principal
amount of the then outstanding Notes may direct the Trustee in its exercise of
any trust or power. The Trustee may withhold from Holders of the Notes notice
of any continuing Default or Event of Default (except a Default or Event of
Default relating to the payment of principal or interest) if it determines that
withholding notice is in their interest.

         In the case of any Event of Default occurring by reason of any willful
action (or inaction) taken (or not taken) by or on behalf of the Company or a
Restricted Subsidiary with the intention of avoiding payment of the premium
that the Company would have had to pay if the Company then had elected to
redeem the Notes pursuant to the optional redemption provisions of the
Indenture, an equivalent premium shall also become and be immediately due and
payable to the extent permitted by law upon the acceleration of the Notes. If
an Event of Default occurs prior to September 15, 2001 by reason of any willful
action (or inaction) taken (or not taken) by or on behalf of the Company or a
Restricted Subsidiary with the intention of avoiding the prohibition on
redemption of the Notes prior to such date, then the premium specified in the
Indenture shall also become immediately due and payable to the extent permitted
by law upon the acceleration of the Notes.

         The Holders of a majority in aggregate principal amount of the Notes
then outstanding by notice to the Trustee may on behalf of the Holders of all
of the Notes waive any existing Default or Event of Default and its
consequences under the Indenture except a continuing Default or Event of
Default in the payment of the principal of or premium, interest or Liquidated
Damages on the Notes.

         The Company is required to deliver to the Trustee annually a statement
regarding compliance with the Indenture, and the Company is required, upon
becoming aware of any Default or Event of Default, to deliver to the Trustee a
statement specifying such Default or Event of Default.

LEGAL DEFEASANCE AND COVENANT DEFEASANCE

         The Company may, at its option and at any time, elect to discharge all
of its obligations with respect to the outstanding Notes and all obligations of
the Restricted Subsidiaries under the Subsidiary Guarantees ("Legal
Defeasance") except for (i) the rights of Holders of outstanding Notes to
receive payments in respect of the principal of and premium, if any, interest
and Liquidated Damages, if any, on the Notes when such payments are due from
the trust referred to below, (ii) the Company's obligations with respect to the
Notes concerning issuing temporary Notes, registration of transfers or
exchanges of Notes, replacement of mutilated, destroyed, lost or stolen Notes
as required by the Indenture and the maintenance of an office or agency for
payment and money for security payments held in trust,





                                      105
<PAGE>   111
(iii) the rights, powers, trusts, duties and immunities of the Trustee, and the
Company's obligations in connection therewith and (iv) the Legal Defeasance and
optional redemption provisions of the Indenture. In addition, the Company may,
at its option and at any time, elect to have its obligations released with
respect to certain covenants that are described in the Indenture ("Covenant
Defeasance") and thereafter any omission to comply with such obligations shall
not constitute a Default or Event of Default with respect to the Notes. In the
event Covenant Defeasance occurs, certain events (not including nonpayment,
bankruptcy, receivership, rehabilitation and insolvency events) described under
"Events of Default" will no longer constitute an Event of Default with respect
to the Notes.

         In order to exercise either Legal Defeasance or Covenant Defeasance,
(i) the Company must irrevocably deposit with the Trustee, in trust, for the
benefit of the Holders of the Notes, cash in U.S. dollars or non-callable
Government Securities, or a combination thereof, in such amounts as will be
sufficient, without reinvestment, in the opinion of a nationally recognized
firm of independent public accountants, to pay the principal of and premium, if
any, interest and Liquidated Damages, if any, on the outstanding Notes on the
stated maturity or on the applicable redemption date, as the case may be; (ii)
in the case of Legal Defeasance, the Company shall have delivered to the
Trustee an opinion of counsel in the United States reasonably acceptable to the
Trustee confirming that (a) the Company has received from, or there has been
published by, the IRS a ruling or (b) since the date of the Indenture, there
has been a change in the applicable federal income tax law, in either case to
the effect that, and based thereon such opinion of counsel shall confirm that,
the Holders of the outstanding Notes will not recognize income, gain or loss
for federal income tax purposes as a result of such Legal Defeasance and will
be subject to federal income tax on the same amounts, in the same manner and at
the same times as would have been the case if such Legal Defeasance had not
occurred; (iii) in the case of Covenant Defeasance, the Company shall have
delivered to the Trustee an opinion of counsel in the United States reasonably
acceptable to the Trustee confirming that the Holders of the outstanding Notes
will not recognize income, gain or loss for federal income tax purposes as a
result of such Covenant Defeasance and will be subject to 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; (iv) no Default or Event
of Default shall have occurred and be continuing on the date of such deposit or
insofar as Events of Default from bankruptcy or insolvency events are
concerned, at any time in the period ending on the 91st day after the date of
deposit; (v) such Legal Defeasance or Covenant Defeasance will not result in a
breach or violation of, or constitute a default under any material agreement or
instrument to which the Company or any of its Subsidiaries is a party or by
which the Company or any of its Subsidiaries is bound; (vi) the Company shall
have delivered to the Trustee an Officer's Certificate stating that the deposit
was not made by the Company with the intent of preferring the Holders of Notes
over the other creditors of the Company with the intent of defeating,
hindering, delaying or defrauding creditors of the Company or others; and (vii)
the Company shall have delivered to the Trustee an Officer's Certificate and an
opinion of counsel, each stating that all conditions precedent provided for
relating to the Legal Defeasance or the Covenant Defeasance, as the case may
be, have been complied with.

TRANSFER AND EXCHANGE

         A Holder may transfer or exchange Notes in accordance with the
Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and the
Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Company is not required to transfer or exchange
any Note selected for redemption. Also, the Company is not required to transfer
or exchange any Note for a period of 15 days before a selection of Notes to be
redeemed.

         The registered Holder of a Note will be treated as the owner of such 
Note for all purposes.

AMENDMENT, SUPPLEMENT AND WAIVER

         Except as provided in the next two succeeding paragraphs, the
Indenture, the Pledge Agreement, the Notes or the Subsidiary Guarantees may be
amended or supplemented by the Company, each Restricted Subsidiary, and the
Trustee with the consent of the Holders of at least a majority in principal
amount of the Notes then outstanding (including, without limitation, consents
obtained in connection with a purchase of, or tender offer or exchange offer
for,





                                      106
<PAGE>   112
Notes), and any existing default or non-compliance with any provision of the
Indenture, the Pledge Agreement, the Notes or the Subsidiary Guarantees may be
waived with the consent of the Holders of a majority in principal amount of the
then outstanding Notes (including consents obtained in connection with a
purchase of, or tender offer or exchange offer for Notes).

         Without the consent of each Holder affected, an amendment or waiver
may not (with respect to any Notes held by a non-consenting Holder): (i) reduce
the principal amount of Notes whose Holders must consent to an amendment,
supplement or waiver; (ii) reduce the principal of or change the fixed maturity
of any Note or alter the provisions with respect to the redemption of the Notes
(other than provisions relating to the covenants described under "-- Repurchase
at the Option of Holders"); (iii) reduce the rate of or change the time for
payment of interest on any Note; (iv) waive a Default or Event of Default in
the payment of principal of or premium, if any, interest or Liquidated Damages,
if any, on the Notes (except a rescission of acceleration of the Notes by the
Holders of at least a majority in aggregate principal amount of the Notes and a
waiver of the payment default that resulted from such acceleration); (v) make
any Note payable in money other than that stated in the Notes; (vi) make any
change in the provisions of the Indenture relating to waivers of past Defaults
or the rights of Holders of Notes to receive payments of principal of or
premium, if any, interest or Liquidated Damages, if any, on the Notes; (vii)
waive a redemption payment with respect to any Note (other than a payment
required by one of the covenants described under "-- Repurchase at the Option
of Holders"); (viii) release any Collateral from the Lien created by the Pledge
Agreement, except in accordance with the terms thereof, or amend the terms
thereof relating to release of Collateral; (ix) release any Restricted
Subsidiary from its Subsidiary Guarantee except as permitted hereunder; (x)
make any change in the provisions of the Indenture requiring any Guarantees
thereof or in the provisions of any such Guarantees; or (xi) make any change in
the foregoing amendment and waiver provisions.

         Notwithstanding the foregoing, without the consent of any Holder of
Notes, the Company, the Restricted Subsidiaries and the Trustee may amend or
supplement the Indenture, the Pledge Agreement, the Notes or the Subsidiary
Guarantees to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Notes in addition to or in place of certificated Notes, to
provide for the assumption of the Company's obligations to Holders of Notes in
the case of a merger or consolidation, to make any change that would provide
any additional rights or benefits to the Holders of Notes or that does not
adversely affect the legal rights under the Indenture of any such Holder, to
add Guarantees of Restricted Subsidiaries with respect to the Notes or to
comply with requirements of the Commission in order to effect or maintain the
qualification of the Indenture under the Trust Indenture Act.

SATISFACTION AND DISCHARGE

         The Indenture will be discharged and will cease to be of further
effect (except as to surviving rights of registration of transfer or exchange
of Notes) as to all outstanding Notes when (i) either (a) all such Notes
theretofore authenticated and delivered (except lost, stolen or destroyed Notes
that have been replaced or paid and Notes for whose payment money has
theretofore been deposited in trust with the Trustee and thereafter repaid to
the Company or discharged from such trust) have been delivered to the Trustee
for cancellation; or (b) all such Notes not theretofore delivered to the
Trustee for cancellation have become due and payable, will become due and
payable by their terms within one year, or are to be called for redemption
within one year under arrangements satisfactory to the Trustee for the giving
of notice of redemption, and in each case the Company has irrevocably deposited
or caused to be deposited with the Trustee funds in an amount of money in U.S.
dollars sufficient to pay and discharge the entire indebtedness on the Notes
not theretofore delivered to the Trustee for cancellation, for the principal
amount, premium, if any, accrued and unpaid interest, and Liquidated Damages,
if any, to the date of such deposit together with irrevocable instructions from
the Company directing the Trustee to apply such funds to the payment thereof;
(ii) the Company has paid all other sums payable by it under the Indenture; and
(iii) the Company has delivered irrevocable instructions to the Trustee to
apply the deposited money toward the payment of the Notes at maturity, as the
case may be. In addition, the Company must deliver an Officers' Certificate and
an opinion of counsel stating that all conditions precedent under the Indenture
to satisfaction and discharge have been complied with.





                                      107
<PAGE>   113
NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES, PARTNERS AND
STOCKHOLDERS

         No past, present or future director, officer, employee, incorporator,
partner or stockholder of either of the Company or any of its Subsidiaries, as
such, shall have any liability for any obligations of the Company or its
Subsidiaries under the Notes, the Subsidiary Guarantees or the Indenture or for
any claim based on, in respect of or by reason of such obligations or their
creation. Each Holder of Notes by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for issuance of
the Notes and the Subsidiary Guarantees.  Such waiver may not be effective to
waive liabilities under the federal Securities laws and it is the view of the
Commission that such a waiver is against public policy.

CONCERNING THE TRUSTEE

         The Indenture contains certain limitations on the rights of the
Trustee, should it become a creditor of the Company, to obtain payment of
claims in certain cases or to realize on certain property received in respect
of any such claim as security or otherwise. The Trustee will be permitted to
engage in other transactions; however, if it acquires any conflicting interest
it must eliminate such conflict within 90 days, apply to the Commission for
permission to continue, or resign.

         The Holders of a majority in principal amount of the then outstanding
Notes will have the right to direct the time, method and place of conducting
any proceeding for exercising any remedy available to the Trustee, subject to
certain exceptions. The Indenture provides that in case an Event of Default
shall occur (which shall not be cured), the Trustee will be required, in the
exercise of its power, to use the degree of care of a prudent man in the
conduct of his own affairs. Subject to such provisions, the Trustee will be
under no obligation to exercise any of its rights or powers under the Indenture
at the request of any Holder of Notes, unless such Holder shall have offered to
the Trustee security and indemnity satisfactory to it against any loss,
liability or expense.

ADDITIONAL INFORMATION

         Anyone who receives this Prospectus may obtain copies of the Indenture
and the Pledge Agreement and the Exchange Registration Rights Agreement without
charge by writing to the Company, 16479 Dallas Parkway, Suite 710, Dallas,
Texas 75248, Attention: Chief Financial Officer.

CERTAIN DEFINITIONS

         Set forth below are certain defined terms used in the Indenture.
Reference is made to the Indenture for a full description of all such terms, as
well as any other capitalized terms used herein for which no definition is
provided.

         "Acquired Indebtedness" means, with respect to any specified Person,
(i) Indebtedness of any other Person existing at the time such other Person is
merged with or into or becomes a Subsidiary of such specified Person,
including, without limitation, Indebtedness Incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.

         "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled by"
and "under common control with"), as used with respect to any Person, shall
mean the possession, directly or indirectly, of the power to direct or cause
the direction of the management or policies of such Person, whether through the
ownership of voting securities, by agreement or otherwise; provided that
beneficial ownership of 10% or more of the voting securities of a Person shall
be deemed to be control.





                                      108
<PAGE>   114
         "Asset Sale" means (a) the direct or indirect sale, lease, license,
conveyance or other disposition of any assets or rights (including, without
limitation, by way of a sale and leaseback or similar arrangement, by merger or
consolidation) by the Company or a Restricted Subsidiary (a "disposition"), in
one transaction or a series of transactions; provided that the disposition of
all or substantially all of the assets of the Company and its Restricted
Subsidiaries taken as a whole will be governed by the provisions of the
Indenture described under "-- Repurchase at the Option of Holders -- Change of
Control" and/or the provisions described under "-- Certain Covenants -- Merger,
Consolidation, or Sale of Assets" and not by the provisions of the covenant
described under "-- Repurchase at the Option of Holders -- Asset Sales," and
(b) the issuance or disposition by the Company or any of its Restricted
Subsidiaries of Equity Interests of the Company's Restricted Subsidiaries.
Notwithstanding the foregoing, none of the following will be deemed an Asset
Sale: (i) a disposition of assets by the Company to a Restricted Subsidiary or
by a Restricted Subsidiary to the Company or to a Restricted Subsidiary; (ii)
an issuance of Equity Interests by a Restricted Subsidiary to the Company or to
a Restricted Subsidiary; (iii) a Restricted Payment that is permitted by the
covenant described under "-- Certain Covenants -- Restricted Payments;" (iv)
dispositions in any fiscal year with Net Proceeds in the aggregate of $1
million or less; (v) dispositions of assets or rights in the ordinary course of
business consistent with past practices ("OCB dispositions"); (vi) dispositions
of inventory that would constitute OCB dispositions except that the
consideration therefor received by the Company or such Restricted Subsidiary
consists of Telecommunications Assets usable by the Company and its Restricted
Subsidiaries in the ordinary course of business; (vii) the grant in the
ordinary course of business of any license of intellectual property rights
(which includes backup, escrow and other licensing arrangements common in the
Telecommunications Business to the extent that such arrangements are beneficial
to the Company and its Restricted Subsidiaries) if (A) such license by its
terms prohibits any disposition thereof (including any sublicense thereof)
other than sublicenses in the ordinary course of business (1) to Affiliates of
such licensee or, (2) solely for the use thereof in the ordinary course of
business, to customers of such licensee, (B) the Company or one or more of its
Restricted Subsidiaries retains the unconditional right to use such
intellectual property without payment of any royalty or other consideration at
least to the extent and in the manner that the Company and its Restricted
Subsidiaries used such intellectual property rights at the time of the grant of
such license, and (C) neither the grant of such license nor the use thereof by
the licensee results in a material decrease in the value of the related
intellectual property rights retained by the Company and its Restricted
Subsidiaries or interferes with or impairs the ability of the Company and its
Restricted Subsidiaries to conduct their business; (viii) the grant of any
license of intellectual property rights if (A) such license provides rights to
the licensee only with respect to jurisdictions outside of the United States
and Canada, (B) the Company or one or more of its Restricted Subsidiaries
retains the unconditional right to use such intellectual property in the United
States and Canada without payment of any royalty or other consideration, and
(C) neither the grant of such license nor the use thereof by the licensee
results in a material decrease in the value of the related retained
intellectual property rights within the United States and Canada; (ix) any
liquidation of any Cash Equivalent; (x) any disposition of defaulted
receivables for collection; and (xi) the grant of any Lien securing
Indebtedness (or any foreclosure thereon) to the extent that such Lien is
granted in compliance with the covenant set forth under "-- Certain Covenants
Liens."

         "Attributable Debt" in respect of a sale and leaseback transaction
means, at the time of determination, the present value (discounted at the rate
of interest implicit in such transaction, determined in accordance with GAAP)
of the obligation of the lessee for net rental payments during the remaining
term of the lease included in such sale and leaseback transaction (including
any period for which such lease has been extended or may, at the option of the
lessor, be extended).

         "Bank Credit Agreement" means any senior revolving credit facility
governing Indebtedness for borrowed money owed by the Company or a Restricted
Subsidiary to banks, trust companies or other institutions that are principally
engaged in the business of lending money to businesses.

         "Capital Lease Obligation" means, at the time any determination
thereof is to be made, the amount of the liability in respect of a capital
lease that would at such time be required to be capitalized on a balance sheet
in accordance with GAAP.





                                      109
<PAGE>   115
         "Capital Stock" means (i) in the case of a corporation, corporate
stock, (ii) in the case of an association or business entity, any and all
shares, interests, participations, rights or other equivalents (however
designated) of corporate stock, (iii) in the case of a partnership, partnership
interests (whether general or limited) and (iv) any other interest or
participation that confers on a Person the right to receive a share of the
profits and losses of, or distributions of assets of, the issuing Person.

         "Cash Equivalents" means (i) Government Securities having maturities
of not more than twelve months from the date of acquisition, (ii) certificates
of deposit and eurodollar time deposits with maturities of twelve months or
less from the date of acquisition, bankers' acceptances with maturities not
exceeding six months and overnight bank deposits, in each case with any member
bank of the U.S. Federal Reserve System having capital and surplus in excess of
$500 million, (iii) repurchase obligations with a term of not more than seven
days for underlying securities of the types described in clause (i) above
entered into with any financial institution meeting the qualifications
specified in clause (ii) above, and (iv) commercial paper having the rating of
at least P-1 from Moody's Investors Service, Inc., or any successor to its
rating business, or at least A-1 from Standard & Poor's Ratings Group, or any
successor to its rating business, and in each case maturing within 180 days
after the date of acquisition.

         "Collateral" means the Pledged Securities and the proceeds thereof.

         "Consolidated Cash Flow" means, with respect to any Person for any
period, the Consolidated Net Income of such Person for such period plus (a) to
the extent deducted in computing Consolidated Net Income, the sum of (i)
provision for taxes based on income or profits of such Person and its
Restricted Subsidiaries for such period, (ii) Consolidated Interest Expense and
(iii) depreciation, amortization (including amortization of goodwill and other
intangibles but excluding amortization of prepaid cash expenses that were paid
in a prior period) of such Person and its Restricted Subsidiaries for such
period, and other non-cash charges (excluding any such non-cash charge to the
extent that it represents an accrual of or reserve for cash charges in any
future period or amortization of a prepaid cash expense that was paid in a
prior period), minus (b) non-cash items increasing consolidated revenues in
determining such Consolidated Net Income for such period (excluding any items
which represent the reversal of any accrual of, or cash reserves for,
anticipated cash charges in any prior period), in each case, on a consolidated
basis and determined in accordance with GAAP. Notwithstanding the foregoing,
the amounts referred to in clauses (a) and (b) of the preceding sentence with
respect to Restricted Subsidiaries shall only be added to (deducted from)
Consolidated Net Income to compute Consolidated Cash Flow to the extent (and in
the same proportion) that the Net Income of such Restricted Subsidiary was
included in calculating the Consolidated Net Income of such Person and only if
a corresponding amount would be permitted at the date of determination to be
paid as a dividend to the Company by such Restricted Subsidiary without direct
or indirect restriction pursuant to the terms of its charter and by-laws and
all agreements, instruments, judgments, decrees, orders, statutes, rules and
governmental regulations applicable to such Restricted Subsidiary or its
stockholders.

         "Consolidated Indebtedness" means, with respect to any Person as of
any date of determination, the sum, without duplication, of (i) the total
amount of Indebtedness of such Person and its Restricted Subsidiaries, plus
(ii) the aggregate liquidation value of all Disqualified Stock (and in the case
of a Restricted Subsidiary of the Company, preferred stock other than preferred
stock held by the Company or any of its Restricted Subsidiaries) of such
Person, in each case, determined on a consolidated basis in accordance with
GAAP.

         "Consolidated Interest Expense" means, with respect to any Person for
any period, the sum, without duplication, of (i) the consolidated interest
expense of such Person and its Restricted Subsidiaries for such period, whether
paid or accrued (including, without limitation, amortization of debt issuance
costs and original issue discount, non-cash interest payments, the interest
component of any deferred payment obligations, the interest component of all
payments associated with Capital Lease Obligations, imputed interest with
respect to Attributable Debt, interest payments in respect of Indebtedness of
another Person that is Guaranteed by such Person or one of its Restricted
Subsidiaries or secured by a Lien on assets of such Person or one of its
Restricted Subsidiaries, commissions, discounts and other fees and charges
incurred in respect of letter of credit or bankers' acceptance financings, and
net payments





                                      110
<PAGE>   116
(if any) pursuant to Hedging Obligations), (ii) the consolidated interest
expense of such Person and its Restricted Subsidiaries that was capitalized
during such period, in each case, on a consolidated basis and in accordance
with GAAP, and (iii) the product of (A) the aggregate amount of dividends paid
(to the extent not accrued in a prior period) or accrued on Disqualified Stock
of the Company and its Restricted Subsidiaries or preferred stock of the
Company's Restricted Subsidiaries, to the extent such Disqualified Stock or
preferred stock is owned by Persons other than the Company and its Restricted
Subsidiaries and (B) a fraction, the numerator of which is one and the
denominator of which is one minus the then current combined federal, state,
local and foreign statutory tax rate of such Person, expressed as a decimal.

         "Consolidated Net Income" means, with respect to any Person for any
period, the aggregate of the Net Income of such Person and its Subsidiaries for
such period, on a consolidated basis, determined in accordance with GAAP;
provided that (i) the Net Income (but not loss) of any Person that is not a
Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the specified Person as to which Consolidated Net
Income is being calculated, (ii) the Net Income of any Restricted Subsidiary
shall be excluded to the extent that the declaration or payment of dividends or
similar distributions by such Restricted Subsidiary of such Net Income would
not be permitted at the date of determination directly or indirectly, pursuant
to the terms of its charter and by-laws and all agreements, instruments,
judgments, decrees, orders, statutes, rules or governmental regulations
applicable to such Restricted Subsidiary or its stockholders, (iii) the Net
Income (if positive) of any Person acquired in a pooling of interests
transaction for any period prior to the date of such acquisition shall be
excluded, and (iv) the cumulative effect of a change in accounting principles
shall be excluded.

         "Consolidated Net Worth" means, with respect to any Person as of any
date, the sum of (i) the consolidated equity of the common equity holders of
such Person and its consolidated Restricted Subsidiaries as of such date plus
(ii) the respective amounts reported on such Person's balance sheet as of such
date with respect to any series of preferred equity (other than Disqualified
Stock) that by its terms is not entitled to the payment of dividends or other
distributions, unless such dividends or other distributions may be declared and
paid only out of net earnings in respect of the year of such declaration and
payment, but only to the extent of any cash received by such Person upon
issuance of such preferred equity, less (x) all write-ups (other than write-ups
resulting from foreign currency translations and write-ups of tangible assets
of a going concern business made within 12 months after the acquisition of such
business) subsequent to the date of the Indenture in the book value of any
asset owned by such Person or a consolidated Restricted Subsidiary of such
Person, (y) all investments as of such date in Persons that are not Restricted
Subsidiaries (except, in each case, Permitted Investments), and (z) all
unamortized debt discount and expense and unamortized deferred charges as of
such date, all of the foregoing determined in accordance with GAAP.

         "Default" means any event that is or with the passage of time or the
giving of notice or both would be an Event of Default.

         "Disqualified Stock" means any Capital Stock that, by its terms (or by
the terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any event, matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, or redeemable
at the option of the holder thereof, in whole or in part, on or prior to the
date that is 91 days after the date on which the Notes mature.

         "Eligible Inventory" means the finished goods, raw materials and
work-in-process of the Company and its Restricted Subsidiaries less any
applicable reserves, each of the foregoing determined in accordance with GAAP.

         "Eligible Receivables" means the trade receivables of the Company and
its Restricted Subsidiaries less the allowance for doubtful accounts, each of
the foregoing determined in accordance with GAAP.

         "Equity Interests" means Capital Stock and all warrants, options or
other rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).





                                      111
<PAGE>   117
         "Equity Investment" means the issuance after the Closing Date of
Capital Stock of the Company (other than Disqualified Stock) to any Person
other than a Subsidiary of the Company in a single transaction or one or more
transactions within a twelve-month period resulting in net cash proceeds to the
Company of at least $30 million.

         "Existing Indebtedness" means Indebtedness of the Company and its
Restricted Subsidiaries in existence on the date of the Indenture pro forma
after giving effect to the Offering.

         "Fair Market Value" means, with respect to any asset or property, the
sale value that would be obtained in an arm's-length transaction between an
informed and willing seller under no compulsion to sell and an informed and
willing buyer under no compulsion to buy; provided that if such value exceeds
$1 million, such determination shall be made in good faith by the Board of
Directors of the Company.

         "GAAP" means generally accepted accounting principles in the United
States of America set forth in the opinions and pronouncements of the
Accounting Principles Board of the American Institute of Certified Public
Accountants and statements and pronouncements of the Financial Accounting
Standards Board or in such other statements by such other entity as have been
approved by a significant segment of the accounting profession, which are in
effect on the date of the Indenture.

         "Government Securities" means direct obligations of, or obligations
fully guaranteed by, or participations in pools consisting solely of
obligations of or obligations guaranteed by, the United States of America for
the payment of which guarantee or obligations the full faith and credit of the
United States of America is pledged.

         "Guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.

         "Hedging Obligations" means, with respect to any Person, the
obligations of such Person under (i) interest or currency exchange rate swap
agreements, interest or currency exchange rate cap agreements and interest or
currency exchange rate collar agreements and (ii) other agreements or
arrangements, in any case, designed to protect such Person against fluctuations
in interest or currency exchange rates (as appropriate, "Interest Rate Hedges"
and "Currency Hedges").

         "Incur" means, with respect to any Indebtedness or other obligation of
any Person, to create, issue, incur (by conversion, exchange or otherwise),
assume, Guarantee or otherwise become liable in respect of such Indebtedness or
other obligation or the recording, as required pursuant to GAAP or otherwise,
of any such Indebtedness or other obligation on the balance sheet of such
Person (and "Incurrence," "Incurred," "Incurrable" and "Incurring" shall have
meanings correlative to the foregoing); provided, however, that a change in
GAAP that results in an obligation of such Person that exists at such time, and
is not theretofore classified as Indebtedness, becoming Indebtedness shall not
be deemed an Incurrence of such Indebtedness.

         "Indebtedness" means, with respect to any Person, (a) any liability of
such Person, whether or not contingent (i) for borrowed money, or under any
reimbursement obligation relating to a letter of credit, bankers' acceptance or
note purchase facility; (ii) evidenced by a bond, note, debenture or similar
instrument (including a purchase money obligation); (iii) for the payment of
money relating to a Capital Lease Obligation; (iv) for or pursuant to
Disqualified Stock; (v) for or pursuant to preferred stock of any Restricted
Subsidiary of the Company (other than preferred stock held by the Company or
any of its Restricted Subsidiaries); (vi) representing the balance deferred and
unpaid of the purchase price of any property or services (except any such
balance that constitutes a trade payable or accrued liability in the ordinary
course of business that is not overdue by more than 90 days or is being
contested in good faith by appropriate proceedings promptly instituted and
diligently conducted); or (vii) under or in respect of Hedging Obligations; (b)
any liability of others described in the preceding clause (a) that such Person
has guaranteed, that is recourse to such Person or that is otherwise its legal
liability, or the payment of which is secured by (or for which the





                                      112
<PAGE>   118
holder of such liability has an existing right to be secured by) any Lien upon
property owned by such Person, even though such Person has not assumed or
become liable for the payment of such liability; and (c) any amendment,
supplement, modification, deferral, renewal, extension or refunding of any
liability of the types referred to in clauses (a) and (b) above. The amount of
any non-interest bearing or other discount Indebtedness shall be deemed to be
the principal amount thereof that would be shown on the balance sheet of the
issuer dated such date prepared in accordance with GAAP, but such Indebtedness
shall be deemed to have been Incurred only on the date of the original issuance
thereof.

         "Investments" means, with respect to any Person, all investments by
such Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees of Indebtedness or other obligations (but
excluding endorsements of negotiable instruments for collection in the ordinary
course of business)), advances or capital contributions (excluding commission,
travel and similar advances to directors, officers and employees made in the
ordinary course of business), purchases or other acquisitions (for
consideration) of Indebtedness, Equity Interests or other securities, together
with all items that are or would be classified as investments on a balance
sheet prepared in accordance with GAAP; provided that an acquisition of Equity
Interests or other securities by the Company or any of its Restricted
Subsidiaries for consideration consisting of common equity securities of the
Company shall not be deemed to be an Investment.

         "Leverage Ratio" means, with respect to any Person as of any date of
determination (the "Calculation Date"), the ratio of (i) the Consolidated
Indebtedness of such Person as of the Calculation Date to (ii) the result of
the multiplication of the Consolidated Cash Flow of such Person for the most
recent full fiscal quarter ending immediately prior to the Calculation Date for
which internal financial statements are available times four. In the event that
the Company or any of its Restricted Subsidiaries Incurs or redeems any
Indebtedness (other than revolving credit borrowings with respect to which the
related commitment remains outstanding) or issues or redeems Disqualified Stock
subsequent to the commencement of the period for which the Leverage Ratio is
being calculated but prior to the Calculation Date, then the Leverage Ratio
shall be calculated giving pro forma effect to such Incurrence or redemption of
Indebtedness, or such issuance or redemption of Disqualified Stock, as if the
same had occurred at the beginning of the applicable period. For purposes of
making the computation referred to above, dispositions of all or substantially
all of an operating unit of a business, Investments, acquisitions, and
discontinued operations (as determined in accordance with GAAP) that have been
made by the Company or any of its Restricted Subsidiaries, including all
mergers and consolidations during the quarter reference period or subsequent to
such reference period and on or prior to the Calculation Date, shall be
calculated on a pro forma basis assuming that all such dispositions,
Investments, acquisitions, discontinued operations, mergers and consolidations
(and the reduction of any associated fixed charge obligations and the change in
Consolidated Cash Flow resulting therefrom) had occurred on the first day of
such reference period. If since the beginning of such reference period any
Person (that subsequently became a Restricted Subsidiary or was merged with or
into the Company or any Restricted Subsidiary since the beginning of such
period) shall have made any Investment, acquisition, disposition which
constitutes all or substantially all of an operating unit of a business,
discontinued operation, merger or consolidation that would have required
adjustment pursuant to this definition, the Leverage Ratio shall be calculated
giving pro forma effect thereto for such reference period as if such
Investment, acquisition, disposition, discontinued operation, merger or
consolidation had occurred at the beginning of such reference period. For
purposes of this definition, whenever pro forma effect is to be given to a
transaction, the pro forma calculations shall be made in good faith by a
responsible financial or accounting officer of the Company.

         "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset,
whether or not filed, recorded or otherwise perfected under applicable law
(including any conditional sale or other title retention agreement, and any
lease in the nature thereof).

         "Net Income" means, with respect to any Person for any period, the net
income (loss) of such Person for such period, determined in accordance with
GAAP and before any reduction in respect of preferred stock dividends,
excluding, however, (i) any gain (but not loss), together with any related
provision for taxes on such gain (but not loss), realized in connection with
(a) any sales of assets (including, without limitation, dispositions pursuant
to sale and





                                      113
<PAGE>   119
leaseback transactions) other than in the ordinary course of business or (b)
the disposition of any securities by such Person or any of its Restricted
Subsidiaries or the extinguishment of any Indebtedness of such Person or any of
its Restricted Subsidiaries, (ii) any extraordinary or non-recurring gain (but
not loss), together with any related provision for taxes on such extraordinary
or non-recurring gain (but not loss), and (iii) unrealized foreign exchange
gains (but not losses).

         "Net Proceeds" means the aggregate cash proceeds received by the
Company or any of its Restricted Subsidiaries in respect of any Asset Sale
(including, without limitation, (i) Cash Equivalents received as consideration
in such Asset Sale, (ii) any cash received upon the disposition of any non-cash
consideration received in such Asset Sale, and (iii) any assumption of
liabilities deemed to constitute "cash" for purposes of the covenant described
in "-- Asset Sales"), net of the direct costs relating to such Asset Sale
(including, without limitation, legal, accounting and investment banking fees,
and sales commissions), any relocation expenses incurred as a result thereof,
any taxes paid or payable by the Company or any of its Restricted Subsidiaries
as a result thereof (after taking into account any available tax credits or
deductions and any tax sharing arrangements), amounts required to be paid to
any Person (other than the Company and its Restricted Subsidiaries) having a
Lien on the assets subject to the Asset Sale, 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 any reserve
for adjustment in respect of the sale price of such asset or assets established
in accordance with GAAP (provided that the amount of any such reserve shall be
deemed to constitute Net Proceeds at the time such reserve shall have been
released or is not otherwise required to be retained for such purpose).

         "Non-Recourse Debt" means Indebtedness (i) as to which neither the
Company nor any of its Restricted Subsidiaries (a) provides credit support of
any kind (including any undertaking, agreement or instrument that would
constitute Indebtedness), (b) is directly or indirectly liable (as a guarantor
or otherwise), or (c) constitutes the lender, (ii) no default with respect to
which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time or both) any holder of any other Indebtedness of the
Company or any of its Restricted Subsidiaries to declare a default on such
other Indebtedness or cause the payment thereof to be accelerated or payable
prior to its stated maturity and (iii) as to which the lenders have expressly
waived any recourse which they may have, in law, equity or otherwise, whether
based on misrepresentation, control, ownership or otherwise, to the Company or
any of its Restricted Subsidiaries, including, without limitation, a waiver of
the benefits of the provisions of Section 1111(b) of the U.S. Bankruptcy Code
(Title 11, United States Code), as amended.

         "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.

         "Officer" means, with respect to any Person, the chief executive
officer, the president, the chief operating officer, the chief financial
officer, the chief accounting officer, the treasurer, any assistant treasurer,
the controller, the secretary, any assistant secretary or any vice-president of
such Person.

         "Officers' Certificate" means a certificate signed on behalf of a
Person by two Officers of such Person, one of whom must be the principal
executive officer, the principal financial officer or the principal accounting
officer of such Person, that meets the requirements set forth in the Indenture.

         "Permitted Holders" means (i) Carlyle HighwayMaster Investors, L.P.,
Carlyle HighwayMaster Investors II, L.P., H.M. Rana Investments Limited, TC
Group, L.L.C., Mark D. Ein, Chase Manhattan Investment Holdings, Inc., Archery
Partners, Clipper/Merban, L.P., Clipper/Merchant Partners, L.P., Clipper
Capital Associates, L.P., Erin Mills International Investment Corporation, The
Erin Mills Investment Corporation, The Erin Mills Development Corporation,
William C. Kennedy, Jr., Donald M. Kennedy, William C. Saunders, Robert S.
Folsom, Robert T. Hayes, and Southwestern Bell Wireless Holdings, Inc., (ii) in
the case of each Permitted Holder described in clause (i) that is an entity,
the beneficial owners of such entity as of the Closing Date, and (iii) all
Affiliates of Permitted Holders described in clauses (i) and (ii) (provided
that, for purposes of this clause (iii) only, the proviso set forth in the
definition of the





                                      114
<PAGE>   120
term "Affiliate" shall be deemed modified to provide that beneficial ownership
of 50% or more of the voting securities of a Person shall constitute, and shall
be necessary to constitute, control).

         "Permitted Investments" means (i) any Investment in the Company or in
a Restricted Subsidiary of the Company; (ii) any Investment in Cash
Equivalents; (iii) any Investment by the Company or any of its Restricted
Subsidiaries in a Person engaged in the Telecommunications Business if, as a
result of such Investment, (A) such Person becomes a Restricted Subsidiary of
the Company or (B) such Person is merged, consolidated or amalgamated with or
into, or transfers or conveys substantially all of its assets to, or is
liquidated into, the Company or a Restricted Subsidiary of the Company; (iv)
any Investment in Government Securities in accordance with the provisions of
the Pledge Agreement; (v) Investments the payment for which consists
exclusively of Equity Interests (excluding Disqualified Stock) of the Company;
(vi) Investments in shares of money market mutual or similar funds having
assets in excess of $500 million; and (vii) Investments in negotiable
instruments held for collection in the ordinary course of business and lease,
utility and similar deposits.

         "Permitted Liens" means (i) Liens securing Permitted Indebtedness
Incurred pursuant to clause (i) of the definition of such term; (ii) Liens in
favor of the Company and/or its Restricted Subsidiaries; (iii) Liens on
property of a Person existing at the time such Person is merged into or
consolidated with the Company or any of its Restricted Subsidiaries, provided
that such Liens were in existence prior to the contemplation of such merger or
consolidation and do not extend to any assets other than those of the Person
merged into or consolidated with the Company or any such Restricted Subsidiary;
(iv) Liens securing any Acquired Indebtedness and which exist at the time of
acquisition thereof by the Company or any of its Restricted Subsidiaries,
provided that such Liens were in existence prior to the contemplation of such
acquisition; (v) Liens arising under the Indenture in favor of the Trustee;
(vi) Liens existing on the date of the Indenture; (vii) Liens arising by reason
of (1) any judgment, decree or order of any court not constituting an Event of
Default; (2) taxes not yet delinquent or which are being contested in good
faith by appropriate proceedings which suspend the collection thereof, promptly
instituted and diligently conducted, and for which adequate reserves have been
established to the extent required by GAAP; (3) security for payment of
workers' compensation or other insurance; (4) good faith deposits in connection
with tenders, leases and contracts (other than contracts for the payment of
money), bids, licenses, performance or similar bonds and other obligations of a
like nature, in the ordinary course of business; (5) zoning restrictions,
easements, licenses, reservations, provisions, covenants, conditions, waivers,
restrictions on the use of property or minor irregularities of title (and with
respect to leasehold interests, mortgages, obligations, Liens and other
encumbrances incurred, created, assumed or permitted to exist and arising by,
through or under a landlord or owner of the leased property, with or without
consent of the lessees), none of which materially impairs the use of any parcel
of property material to the operation of the business of the Company or any
Restricted Subsidiary or the value of such property for the purpose of such
business; (6) deposits to secure public or statutory obligations or in lieu of
surety or appeal bonds; (7) surveys, exceptions, title defects, encumbrances,
easements, reservations of, or rights of others for, rights of way, sewers,
electric lines, telegraph or telephone lines and other similar purposes or
zoning or other restrictions as to the use of real property not interfering
with the ordinary conduct of the business of the Company or any of its
Restricted Subsidiaries; or (8) operation of law or statute and incurred in the
ordinary course of business, including without limitation, those in favor of
mechanics, materialmen, suppliers, laborers or employees, and, if securing sums
of money, for sums which are not yet delinquent or are being contested in good
faith by appropriate proceedings which suspend the collection thereof, promptly
instituted and diligently conducted, and for which adequate reserves have been
established to the extent required by GAAP; (viii) Liens created by the Pledge
Agreement; (ix) Liens resulting from the deposit of funds or Government
Securities in trust for the purpose of decreasing or defeasing Indebtedness of
the Company and its Restricted Subsidiaries so long as such deposit of funds or
Government Securities and such decreasing or defeasing of Indebtedness are
permitted under the "Restricted Payments" covenant; (x) Liens securing
obligations in a maximum aggregate amount not to exceed $15 million and
consisting exclusively of (1) Permitted Indebtedness Incurred pursuant to
clause (vii) of the definition of such term and (2) Attributable Debt that
could have been Incurred as a Capital Lease Obligation pursuant to clause (vii)
of the definition of the term "Permitted Indebtedness"; provided that such
Liens attach only to assets subject to such capital lease or sale and leaseback
transaction and other assets directly related thereto; (xi) Liens constituting
licenses of intellectual property rights not otherwise prohibited under the
terms of the Indenture; and (xii) any extension, renewal or replacement (or
successive extensions, renewals or





                                      115
<PAGE>   121
replacements), in whole or in part, of any Lien referred to in the foregoing
clauses (iii), (iv) and (vi) above; provided that the principal amount of the
Indebtedness secured thereby shall not exceed the principal amount of
Indebtedness secured thereby immediately prior to the time of such extension,
renewal or replacement, and that such extension, renewal or replacement Lien
shall be limited to all or a part of the property that secured the Lien so
extended, renewed or replaced (plus improvements on such property).

         "Permitted Refinancing Indebtedness" means any Indebtedness of the
Company or any of its Restricted Subsidiaries issued in exchange for, or the
net proceeds of which are used by such Person to extend, refinance, renew,
replace, defease or refund other Indebtedness of such Person ("Old
Indebtedness"); provided that: (i) the principal amount (or accreted value, if
applicable) of such Permitted Refinancing Indebtedness does not exceed the
principal amount (or accreted value, if applicable) of the Old Indebtedness;
(ii) such Permitted Refinancing Indebtedness has a final maturity date equal to
or later than the final maturity date of, and has a Weighted Average Life to
Maturity equal to or greater than the Weighted Average Life to Maturity of, the
Old Indebtedness; (iii) if the Old Indebtedness is subordinated in right of
payment to the Notes, such Permitted Refinancing Indebtedness is subordinated
in right of payment to the Notes on terms at least as favorable to the Holders
as those contained in the documentation governing the Old Indebtedness; (iv)
such Permitted Refinancing Indebtedness is on terms that are no more
restrictive, as a whole, than those governing such Old Indebtedness; and (v)
such Permitted Refinancing Indebtedness is Incurred only by the Company or the
Restricted Subsidiary that is the obligor on the Old Indebtedness.

         "Permitted Telecommunications Investments" means Investments made by
the Company and its Restricted Subsidiaries in Persons (including Unrestricted
Subsidiaries) engaged as a primary business in the Telecommunications Business.

         "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.

         "Pledge Account" means an account established with the Trustee
pursuant to the terms of the Pledge Agreement for the deposit of the Pledged
Securities purchased by the Company with a portion of the proceeds from the
sale of the Notes.

         "Pledge Agreement" means the Collateral Pledge and Security Agreement,
dated as of the date of the Indenture, by and between the Company and the
Trustee governing the disbursement of funds from the Pledge Account, as such
may be amended from time to time pursuant to the terms thereof.

         "Pledged Securities" means the securities purchased with a portion of
the proceeds from the sale of the Notes, which shall consist of Government
Securities, to be deposited in the Pledge Account.

         "Restricted Investment" means an Investment other than a Permitted
Investment.

         "Restricted Subsidiary" of a Person means any Subsidiary of such
Person that is not an Unrestricted Subsidiary.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Stockholders' Agreement" means that certain Amended and Restated
Stockholders Agreement, dated as of September 27, 1996, by and among the
Company and certain stockholders of the Company, as in effect on the Closing
Date.

         "Subordinated Indebtedness" means Indebtedness of the Company (or a
Restricted Subsidiary) that is expressly subordinated in right of payment to
the Notes (or a Subsidiary Guarantee, as appropriate).





                                      116
<PAGE>   122
         "Subsidiary" means, with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of Capital Stock entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
Person or one or more of the other Subsidiaries of such Person (or a
combination thereof) and (ii) any partnership (a) the sole general partner or
the managing general partner of which is such Person or a Subsidiary of such
Person or (b) the only general partners of which are such Person or of one or
more Subsidiaries of such Person (or any combination thereof). Unless indicated
to the contrary, "Subsidiary" refers to a Subsidiary of the Company.

         "Subsidiary Guarantee" means an unconditional guaranty of the Notes
and the Indenture given by any Restricted Subsidiary or other Person pursuant
to the terms of the Indenture or any supplement thereto.

         "Telecommunications Assets" means assets or working capital used or
useful in the conduct or furtherance of a Telecommunications Business.

         "Telecommunications Business" means the business of (i) developing,
implementing, marketing and distributing voice, data or position location
solutions for mobile communications markets, or (ii) evaluating, participating
in or pursuing any other activity or opportunity that is related to those
identified in clause (i) above.

         "Unrestricted Subsidiary" means any Subsidiary that is designated by
the Board of Directors of the Company as an Unrestricted Subsidiary pursuant to
a resolution of the Board of Directors of the Company, but only to the extent
that such Subsidiary (i) has no Indebtedness other than Non-Recourse Debt, (ii)
does not own any Equity Interests of, or own or hold any Lien on, any property
of the Company or any Restricted Subsidiary of the Company (other than any
Subsidiary of the Subsidiary to be so designated), (iii) has not, and the
Subsidiaries of such Subsidiary have not at the time of designation, and does
not thereafter, Incur any Indebtedness pursuant to which the lender has
recourse to any of the assets of the Company or any of its Restricted
Subsidiaries, (iv) is not party to any material agreement, contract,
arrangement or understanding with the Company or any of its Restricted
Subsidiaries unless either (a) the terms of any such agreement, contract,
arrangement or understanding are no less favorable to the Company or such
Restricted Subsidiary than those that might be obtained at the time from
Persons who are not Affiliates of the Company, or (b) such agreement, contract,
arrangement or understanding is a license of intellectual property by the
Company or a Restricted Subsidiary of the Company to an Unrestricted Subsidiary
of the Company and less than all of the outstanding Capital Stock or other
ownership interests of such Unrestricted Subsidiary (other than directors'
qualifying shares) is owned by the Company and its Restricted Subsidiaries, (v)
is a Person with respect to which neither the Company nor any of its Restricted
Subsidiaries has any direct or indirect obligation (a) to subscribe for
additional Equity Interests or (b) to maintain or preserve such Person's
financial condition or to cause such Person to achieve any specified levels of
operating results, (vi) has not guaranteed or otherwise directly or indirectly
provided credit support for any Indebtedness of the Company or any of its
Restricted Subsidiaries and (vii) has at least one director on its board of
directors that is not a director or executive officer of the Company or any of
its Restricted Subsidiaries and has at least one executive officer that is not
a director or executive officer of the Company or any of its Restricted
Subsidiaries. Any such designation by the Board of Directors of the Company
shall be evidenced to the Trustee by filing with the Trustee a certified copy
of the resolution of the Board of Directors of the Company giving effect to
such designation and an Officers' Certificate certifying that (i) such
designation complied with the foregoing conditions, (ii) such designation was
permitted by the covenant described under "-- Certain Covenants -- Restricted
Payments," (iii) immediately after giving effect to such designation, the
Company could Incur at least $1.00 of additional Indebtedness pursuant to the
Leverage Ratio test set forth in the first paragraph of the covenant described
under the caption "-- Certain Covenants-- Incurrence of Indebtedness" and (iv)
no Default or Event of Default would be in existence immediately following such
designation. If, at any time, any Unrestricted Subsidiary would fail to meet
the foregoing requirements as an Unrestricted Subsidiary, it shall thereafter
cease to be an Unrestricted Subsidiary for purposes of the Indenture and any
Indebtedness, Liens or agreements of such Subsidiary shall be deemed to be
Incurred or created by a Restricted Subsidiary of the Company as of such date
(and, if such Indebtedness, Liens or agreements are not permitted to be
Incurred or created as of such date under the covenants described under "--
Certain Covenants," the Company shall be in default of such





                                      117
<PAGE>   123
covenants). The Board of Directors of the Company may at any time designate any
Unrestricted Subsidiary to be a Restricted Subsidiary, provided that such
designation shall be deemed to be an Incurrence of Indebtedness and a creation
of Liens and agreements by a Restricted Subsidiary of the Company of any
outstanding Indebtedness, Liens or agreements of such Unrestricted Subsidiary
and such designation shall only be permitted if (i) such Indebtedness, Liens
and agreements are permitted under the covenants described under "-- Certain
Covenants," and (ii) no Default or Event of Default would be in existence
immediately following such designation.

         "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (i) the sum
of the products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse
between such date and the making of such payment, by (ii) the then outstanding
principal amount of such Indebtedness.

         "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall at
the time be owned by such Person or by one or more Wholly Owned Restricted
Subsidiaries of such Person.

BOOK-ENTRY, DELIVERY AND FORM

         Except as set forth in the next paragraph, the Exchange Notes will
initially be issued in the form of one or more Global Notes (the "Global
Notes"). The Global Notes will be deposited on the date of the closing of the
sale of the Notes offered hereby (the "Closing Date") with, or on behalf of,
the Depositary and registered in the name of Cede & Co., as nominee for the
Depositary (such nominee being referred to herein as the "Global Note Holder").

         Exchange Notes that are issued as described below under " --
Certificated Securities" will be issued in registered form (the "Certificated
Securities"). Upon the transfer of Certificated Securities, such Certificated
Securities may, unless the Global Notes have previously been exchanged for
Certificated Securities, be exchanged for an interest in a Global Note
representing the principal amount of Notes being transferred.

         The Depositary is a limited-purpose trust company which was created to
hold securities for its participating organizations (collectively, the
"Participants" or the "Depositary's Participants") and to facilitate the
clearance and settlement of transactions in such securities between
Participants through electronic book-entry changes in accounts of its
Participants. The Depositary's Participants include securities brokers and
dealers (including the Initial Purchaser), banks and trust companies, clearing
corporations and certain other organizations. Access to the Depositary's system
is also available to other entities such as banks, brokers, dealers and trust
companies (collectively, the "Indirect Participants" or the "Depositary's
Indirect Participants") that clear through or maintain a custodial relationship
with a Participant, either directly or indirectly. Persons who are not
Participants may beneficially own securities held by or on behalf of the
Depositary only through the Depositary's Participants or the Depositary's
Indirect Participants.

         The Company expects that pursuant to procedures established by the
Depositary (i) upon deposit of the Global Notes, the Depositary will credit the
accounts of Participants with portions of the principal amount of the Global
Notes and (ii) ownership of the Notes evidenced by the Global Notes will be
shown on, and the transfer of ownership thereof will be effected only through,
records maintained by the Depositary (with respect to the interests of the
Depositary's Participants), the Depositary's Participants and the Depositary's
Indirect Participants. Prospective purchasers are advised that the laws of some
states require that certain Persons take physical delivery in definitive form
of securities that they own. Consequently, the ability to transfer Exchange
Notes evidenced by the Global Notes will be limited to such extent. For certain
other restrictions on the transferability of the Exchange Notes, see "Notice to
Investors."

         So long as the Global Note Holder is the registered owner of any
Exchange Notes, the Global Note Holder will be considered the sole owner or
holder of such Exchange Notes outstanding under the Indenture. Beneficial
owners of Exchange Notes evidenced by the Global Note will not be considered
the owners or holders thereof under the Indenture





                                      118
<PAGE>   124
for any purpose, including with respect to the giving of any directions,
instructions or approvals to the Trustee thereunder. The ability of a Person
having a beneficial interest in Exchange Notes represented by a Global Note to
pledge such interest to Persons or entities that do not participate in the
Depositary's system or to otherwise take actions in respect of such interest,
may be affected by the lack of a physical certificate evidencing such interest.

         None of the Company nor the Trustee will have any responsibility or
liability for any aspect of the records relating to or payments made on account
of Exchange Notes by the Depositary, or for maintaining, supervising or
reviewing any records of the Depositary relating to such Exchange Notes.

         Payments in respect of the principal of, premium, if any, interest and
Liquidated Damages, if any, on any Exchange Notes registered in the name of a
Global Note Holder on the applicable record date will be payable by the Trustee
to or at the direction of such Global Note Holder in its capacity as the
registered holder under the Indenture.  Under the terms of the Indenture, the
Company and the Trustee may treat the Persons in whose names the Exchange
Notes, including the Global Notes, are registered as the owners thereof for the
purpose of receiving such payments and for any and all other purposes
whatsoever. Consequently, none of the Company nor the Trustee has or will have
any responsibility or liability for the payment of such amounts to beneficial
owners of Exchange Notes (including principal, premium, if any, interest and
Liquidated Damages, if any).

         The Company believes, however, that it is currently the policy of the
Depositary to immediately credit the accounts of the relevant Participants with
such payment, in amounts proportionate to their respective holdings in
principal amount of beneficial interests in the relevant security as shown on
the records of the Depositary. Payments by the Depositary's Participants and
the Depositary's Indirect Participants to the beneficial owners of Exchange
Notes will be governed by standing instructions and customary practice and will
be the responsibility of the Depositary's Participants or the Depositary's
Indirect Participants.

CERTIFICATED SECURITIES

         Subject to certain conditions, any Person having a beneficial interest
in a Global Note may, upon request to the Company or the Trustee, exchange such
beneficial interest for Exchange Notes in the form of Definitive Notes. Upon
any such issuance, the Trustee is required to register such Exchange Notes in
the name of, and cause the same to be delivered to, such Person or Persons. In
addition, if (i) the Company notifies the Trustee in writing that the
Depositary is no longer willing or able to act as a depositary and the Company
is unable to appoint a qualified successor within 90 days or (ii) the Company,
at its option, notifies the Trustee in writing that it elects to cause the
issuance of Exchange Notes in the form of Definitive Notes under the Indenture,
then, upon surrender by the relevant Global Note Holder of its Global Note,
Exchange Notes in such form will be issued to each Person that the Depositary
identifies as the beneficial owner of the related Exchange Notes.

         Neither the Company nor the Trustee shall be liable for any delay by
the Depositary in identifying the beneficial owners of the related Exchange
Notes and each such Person may conclusively rely on, and shall be protected in
relying on, instructions from the Depositary for all purposes (including with
respect to the registration and delivery, and the respective principal amounts,
of the Exchange Notes to be issued).

SAME DAY SETTLEMENT AND PAYMENT

         The Indenture requires that payments in respect of the Notes
represented by the Global Securities (including principal, premium, if any,
interest and Liquidated Damages, if any) be made by wire transfer of
immediately available funds to the accounts specified by the Global Security
Holder. With respect to Certificated Securities, the Company will make all
payments of principal, premium, if any, interest and Liquidated Damages, if
any, by wire transfer of immediately available funds to the accounts specified
by the Holders thereof or, if no such account is specified, by mailing a check
to each such Holder's registered address. The Notes represented by the Global
Notes are expected to trade in the Depositary's Same Day Funds Settlement
System, and any permitted secondary market trading activity in





                                      119
<PAGE>   125
such Notes will therefore be required by the Depositary to be settled in
immediately available funds. The Company expects that secondary trading in the
Certificated Securities will also be settled in immediately available funds.

                     CERTAIN U.S. FEDERAL TAX CONSEQUENCES

         The following discussion is a summary of certain U.S. federal tax
consequences relevant to the exchange of Old Notes for Exchange Notes and the
ownership of Exchange Notes by persons who (a) acquired Old Notes on original
issue for cash and (b) hold Old Notes and Exchange Notes as capital assets
within the meaning of Section 1221 of the Internal Revenue Code of 1986, as
amended (the "Code").  The discussion is based upon the Code, Treasury
Regulations, Internal Revenue Service ("IRS") rulings and pronouncements, and
judicial decisions now in effect, all of which are subject to change at any
time by legislative, administrative, or judicial action. The discussion does
not discuss every aspect of U.S. federal taxation that may be relevant to a
particular taxpayer under special circumstances or to persons who are otherwise
subject to a special tax treatment (including, without limitation, banks,
broker-dealers, insurance companies, pension and other employee benefit plans,
tax exempt organizations and entities, persons holding Notes, Warrants, or
Common Stock as a part of a hedging or conversion transaction or a straddle,
and holders whose functional currency is not the U.S. dollar) and it does not
discuss the effect of any applicable U.S. state and local or non-U.S. tax laws.
The Company has not sought and will not seek any rulings from the IRS
concerning the tax consequences of the exchange of Old Notes for Exchange Notes
and the ownership of Exchange Notes and, accordingly, there can be no assurance
that the IRS will not successfully challenge the tax consequences described
below. EACH PROSPECTIVE PURCHASER IS URGED TO CONSULT HIS OWN TAX ADVISOR WITH
RESPECT TO THE U.S. FEDERAL TAX CONSEQUENCES OF EXCHANGING OLD NOTES FOR
EXCHANGE NOTES AND OWNING EXCHANGE NOTES, AS WELL AS ANY TAX CONSEQUENCES
APPLICABLE UNDER THE LAWS OF ANY U.S. STATE, LOCAL, OR NON-U.S. TAXING
JURISDICTION.

U.S. HOLDERS

         This Section summarizes certain U.S. federal income tax consequences
of the exchange of Old Notes for Exchange Notes and the ownership of Exchange
Notes by "U.S. Holders." The term "U.S. Holder" refers to a person that is
classified for U.S. federal tax purposes as a United States person. For this
purpose, a United States person includes (i) a resident (within the meaning of
Section 7701(b) of the Code) or current or former citizen of the United States,
(ii) a corporation, limited liability company, or partnership created or
organized in the United States or under the laws of the United States or of any
state or political subdivision thereof, or (iii) an estate or trust whose
income is includable in gross income for U.S. federal income tax purposes
regardless of its source.

         Exchange of Notes.  The exchange of Old Notes for the Exchange Notes
pursuant to the Exchange Offer should not be treated as an "exchange" for
federal income tax purposes, because the Exchange Notes should not be
considered to differ materially in kind or extent from the Old Notes.
Accordingly, the exchange of Old Notes for Exchange Notes should not be a
taxable event to holders for federal income tax purposes.  Moreover, the
Exchange Notes should have the same tax attributes and tax consequences to
holders as the Old Notes had to holders, including, without limitation, the
same issue price, adjusted issue price, original issue discount ("OID"),
adjusted tax basis and holding period.  The tax attributes and tax consequences
of ownership of the Old Notes and, thus, of the Exchange Notes (collectively,
the "Notes"), are summarized below.

         Stated Interest. Stated interest paid or accrued on the Notes will be
taxable to a U.S. Holder as ordinary income in accordance with the holder's
method of accounting for federal income tax purposes. Alternatively, a U.S.
Holder may elect to include stated interest on the Notes (as well as OID,
market discount, de minimis market discount and unstated interest on the Notes,
as adjusted by any amortizable bond premium or acquisition premium) in gross
income on a constant-yield basis. The election will generally apply only to the
Note with respect to which it is made and may not be revoked without the
consent of the IRS. The mechanics and implications of such an election are
beyond the scope of this discussion and, as a result, U.S. Holders should
consult their own tax advisors regarding the desirability of making such an
election.





                                      120
<PAGE>   126
         Original Issue Discount. The Notes were issued with OID for U.S.
federal income tax purposes. The amount of OID on a Note equals the excess of
the principal amount due at maturity on the Note over its "issue price."  The
Company has determined that the portion of the purchase price originally paid
for each Unit which was properly allocable to each Note and, thus, the "issue
price" of each $1,000 Note, equaled $966.51.  Although this allocation is not
binding on the IRS, each U.S. Holder is bound by the Company's allocation,
unless a disclosure statement is attached to the timely filed U.S. federal
income tax of the U.S. Holder for its taxable year in which it acquired the
Note.

         Each U.S. Holder (whether reporting on the cash or accrual basis of
accounting for tax purposes) will be required to include in taxable income for
any particular taxable year the daily portion of the OID described in the
preceding paragraph that accrues on the Note for each day during the taxable
year on which such U.S. Holder holds the Note, and in advance of the receipt of
the cash to which such OID is attributable. The daily portion is determined by
allocating to each day of an accrual period (generally, in the case of the
Notes, the initial period beginning on the issue date and ending on March 15,
1998 and each subsequent six-month period thereafter ending on March 15 and
September 15) a pro rata portion of the OID allocable to such accrual period.
The amount of OID allocable to an accrual period equals the excess of (i) the
product of the "adjusted issue price" of the Note at the beginning of the
accrual period and the Note's "yield to maturity," over (ii) the amount of any
stated interest payments allocable to such accrual period. The "yield to
maturity" of the Notes is the discount rate that, when applied to all payments
due under the Notes (including stated interest payments), results in a present
value equal to the issue price of the Notes. The "adjusted issue price" of a
Note at the beginning of an accrual period will equal its issue price,
increased by the aggregate amount of OID that has accrued on the Note in all
prior accrual periods, and decreased by any principal payments made on the Note
during all prior accrual periods.

         Impact of Applicable High Yield Discount Obligation Rules. If the
yield-to-maturity on the Notes equals or exceeds the sum of 5% and the
"applicable federal rate" (within the meaning of Section 1274(d) of the Code)
in effect for the month in which the Notes are issued ("AFR"), the Notes would
be considered "applicable high yield discount obligations" within the meaning
of Section 163(i) of the Code. In such a case, the Company would not be
permitted to take a deduction for U.S. federal income tax purposes for interest
and OID accrued on the Notes until such time as the Company actually pays such
interest and OID in cash or in property other than stock or debt of the Company
(or persons related to the Company). Moreover, to the extent that the yield to
maturity of the Notes exceeds the sum of 6% and the AFR, such excess (the
"Dividend-Equivalent Interest") would not be deductible at any time by the
Company for U.S.  federal income tax purposes (regardless of whether the
Company actually pays such Dividend Equivalent Interest in cash or in other
property). Such Dividend-Equivalent Interest would be treated as a dividend to
the extent it is deemed to have been paid out of the Company's current or
accumulated earnings and profits. Accordingly, a U.S. Holder that is a domestic
corporation may be entitled to take a dividends-received deduction with respect
to any Dividend-Equivalent Interest received by such corporate U.S. Holder on
the Note.

         Sale, Retirement, or Other Taxable Disposition of Notes. A U.S. Holder
whose Notes are sold or redeemed for cash will recognize gain or loss to the
extent of the difference between the cash received (other than amounts
reflecting accrued and unpaid stated interest on the Notes, which will be taxed
as ordinary income), and the U.S.  Holder's adjusted tax basis in the Notes. A
U.S. Holder's tax basis in a Note will initially equal the issue price of the
Note (determined as described under "-- Original Issue Discount," above, and
will subsequently be increased by the OID includable in such U.S. Holder's
taxable income under the rules described in "-- Original Issue Discount,"
above, and will be reduced by any stated principal payments received on the
Note. Any such gain recognized by a U.S. Holder under the rules described in
this paragraph will be (a) long-term capital gain if the U.S. Holder has held
the Note for more than 18 months, (b) mid-term capital gain if the U.S. Holder
has held the Note for more than one year but not more than 18 months, and (c)
short-term capital gain if the U.S. Holder has not held the Note for more than
one year. Under the recently enacted Taxpayer Relief Act of 1997, (i) long-term
capital gains of individuals are now generally taxed at a maximum rate of 20%
and (ii) mid-term capital gains of individuals are now generally taxed at a
maximum rate of 28%.  Short-term capital gains continue to be taxed at ordinary
income rates and the deductibility of capital losses continues to be subject to
certain limitations.





                                      121
<PAGE>   127
         Holders of Notes should be aware that the market discount rules may
affect resale of the Notes. If a subsequent purchaser of a Note purchases the
Note at a "market discount" and thereafter recognizes gain upon its
disposition, such gain will be taxable as ordinary interest income (rather than
capital gain) to the extent of the "market discount" that has accrued (and has
not otherwise been included in income pursuant to an election made by such
subsequent purchaser) during the period the subsequent purchaser held such
Note. Generally, "market discount" will exist on the purchase of a Note if the
purchase price is less than the adjusted issue price of the Note and any such
market discount will accrue over the remaining term of the Note on a straight
line basis or, at the election of the subsequent purchaser, on a constant yield
to maturity basis.

         Liquidated Damages. The Company intends to take the position that the
Liquidated Damages described above under "Description of the Notes --
Registration Rights; Liquidated Damages" are taxable to U.S. Holders as
ordinary income in accordance with the U.S. Holder's usual method of income tax
accounting. The IRS may take a different position, however, which could require
the U.S. Holder to include such Liquidated Damages in income as they accrue or
become fixed, regardless of the U.S. Holder's method of income tax accounting.

         Information Reporting; Backup Withholding. The Company is required to
furnish to record holders of the Notes, other than corporations and other
exempt holders, and to the IRS, information with respect to interest paid and
the amount of OID accrued on the Notes. Holders who purchase Notes after the
Offering for an amount that differs from the adjusted issue price of the Notes
are required to determine for themselves the amount of OID that is includable
in their taxable income.

         Certain U.S. Holders may be subject to backup withholding at the rate
of 31% with respect to interest and OID paid on the Notes or with respect to
proceeds received from a disposition of the Notes. Generally, backup
withholding applies only if (i) the payee fails to furnish a correct taxpayer
identification number ("TIN") to the payor in the manner required or fails to
demonstrate that it otherwise qualifies for an exemption, (ii) the IRS notifies
the payor that the TIN furnished by the payee is incorrect, (iii) the payee has
failed to report properly the receipt of a "reportable payment" on one or more
occasions and the IRS has notified the payor that withholding is required, or
(iv) the payee fails (in certain circumstances) to provide a certified
statement, signed under penalties of perjury, that the TIN furnished is the
correct number and that such holder is not subject to backup withholding.
Backup withholding is not an additional tax but, rather, is a method of tax
collection. U.S. Holders will be entitled to credit any amounts withheld under
the backup withholding rules against their actual tax liabilities provided the
required information is furnished to the IRS.

NON-U.S. HOLDERS

         This Section summarizes certain U.S. federal tax consequences of the
exchange of Old Notes for Exchange Notes and the ownership of Notes by
"Non-U.S. Holders." The term "Non-U.S. Holder" refers to a person that is not
classified for U.S. federal tax purposes as a "United States person," as
defined in "-- U.S. Holders," above.

         Exchange of Notes.  The exchange of Old Notes for the Exchange Notes
pursuant to the Exchange Offer should not be a taxable event to Non-U.S.
Holders for U.S. federal income tax purposes.

         Interest and OID. In general, a Non-U.S. Holder will not be subject to
U.S. federal income tax or regular withholding tax with respect to stated
interest or OID received or accrued on the Notes so long as (a) the interest
and OID is not effectively connected with the conduct of a trade or business
within the United States, (b) the Non-U.S.  Holder does not actually or
constructively own 10% or more of the total combined voting power of all
classes of stock of the Company entitled to vote, (c) the Non-U.S. Holder is
not a controlled foreign corporation that is related to the Company actually or
constructively through stock ownership, and (d) either (i) the beneficial owner
of the Note certifies to the Company or its agent, under penalties of perjury,
that it is not a U.S. Holder and provides its name and address on U.S. Treasury
Form W-8 (or on a suitable substitute form) or (ii) the Note is held by 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 such financial institution certifies under
penalties of perjury that such a Form W-8





                                      122
<PAGE>   128
(or suitable substitute form) has been received from the beneficial owner by it
or by a financial institution between it and the beneficial owner and furnishes
the payor with a copy thereof.

         Gain on Disposition of Notes.  Non-U.S. Holders generally will not be
subject to U.S. federal income taxation on gain recognized on a disposition of
Notes so long as (i) the gain is not effectively connected with the conduct by
the Non-U.S. Holder of a trade or business within the United States and (ii) in
the case of a Non-U.S. Holder who is an individual, either such Non-U.S. Holder
is not present in the United States for 183 days or more in the taxable year of
disposition or such Non-U.S. Holder does not have a "tax home" (within the
meaning of section 911(d)(3) of the Code) in the United States.

         Federal Estate Taxes. In general, an individual who is a Non-U.S.
Holder will incur liability for U.S. federal estate tax if the fair market
value of the property included in such individual's taxable estate for U.S.
federal estate tax purposes exceeds the statutory threshold amount, which is
currently $60,000. For these purposes, a Note held by such an individual who,
at the time of death, is not a citizen or resident of the United States should
not be subject to U.S.  federal estate tax as a result of such individual's
death if the individual does not actually or constructively own 10% or more of
the total combined voting power of all classes of stock of the Company entitled
to vote and, at the time of the individual's death, if 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 United States.

         U.S. Information Reporting Requirements and Backup Withholding Tax.
Generally, payments of interest, OID, premium or principal on the Notes to
Non-U.S. Holders will not be subject to information reporting or backup
withholding if the Non-U.S. Holder complies with the certification requirements
set forth in clause (d) under "-- Interest and OID on Notes" above.

         Non-U.S. Holders will not be subject to information reporting or
backup withholding with respect to the payment of proceeds from the disposition
of Notes effected by, to or through the foreign office of a broker; provided,
however, that if the broker is a U.S. person or a U.S.-related person,
information reporting (but not backup withholding) would apply unless the
broker has documentary evidence in its records as to the Non-U.S. Holder's
foreign status (and has no actual knowledge to the contrary), or the Non-U.S.
Holder certifies as to its non-U.S. status under penalty of perjury or
otherwise establishes an exemption. Non-U.S. Holders will be subject to
information reporting and backup withholding at a rate of 31% with respect to
the payment of proceeds from the disposition of Notes effected by, to or
through the U.S. office of a broker, unless the Non-U.S. Holder certifies as to
its non-U.S. status under penalty of perjury or otherwise establishes an
exemption.

         The IRS has proposed regulations that, if issued as final regulations,
would require Non-U.S. Holders to provide additional information in order to
establish an exemption from, or reduce the rate of, withholding tax or backup
withholding tax and, in particular, would require certain Non-U.S. Holders, and
foreign partners of partnerships that are Non-U.S. Holders, to provide certain
information and comply with certain certification requirements not required
under existing law, including requirements that the Non-U.S. Holder furnish its
name, address and taxpayer identification number. Such proposed regulations are
proposed to be effective generally for payments made after December 31, 1997.
It is not possible to predict whether, or in what form, the proposed
regulations ultimately will be adopted.

         Amounts withheld under the backup withholding rules do not constitute
a separate U.S. federal income tax.  Rather, amounts withheld under the backup
withholding rules from a payment to a Non-U.S. Holder will be allowed as a
credit against such Non-U.S. Holder's U.S. federal income tax liability and any
amounts withheld in excess of such Non- U.S. Holder's U.S. federal income tax
liability would be refunded, provided that the required information is
furnished to the IRS.





                                      123
<PAGE>   129
                              PLAN OF DISTRIBUTION

         Each Participating Broker-Dealer that receives Exchange Notes for its
own account in connection with 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 Participating Broker-Dealers during the period referred to below in
connection with resales of Exchange Notes received in exchange for Old Notes
where such Old Notes were acquired by such Participating Broker-Dealers for
their own accounts as a result of market- making activities or other trading
activities (other than a resale of an unsold allotment from the original sale
of Old Notes).  The Company has agreed that this 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 such Exchange Notes for a period
ending 180 days from the date on which the Exchange Offer Registration
Statement is declared effective.  However, a Participating Broker-Dealer who
intends to use this Prospectus in connection with the resale of Exchange Notes
received in exchange for Old Notes pursuant to the Exchange Offer must notify
the Company, or cause the Company to be notified, on or prior to the Expiration
Date, that it is a Participating Broker-Dealer.  Such notice may be given in
the space provided for that purpose in the Letter of Transmittal or may be
delivered to the Exchange Agent at one of the addresses set forth in the Letter
of Transmittal.  See "The Exchange Offer -- Resales of Exchange Notes."

         The Company will not receive any proceeds from the issuance of the
Exchange Notes offered hereby.  Exchange Notes received by Participating
Broker-Dealers for their own accounts in connection with 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 at 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 Participating Broker- Dealer that
resells Exchange Notes that were received by it for its own account in
connection with 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, a Participating Broker-Dealer will not be deemed to
admit that it is an "underwriter" within the meaning of the Securities Act.

         For a period ending 180 days from the date on which the Exchange Offer
Registration Statement is declared effective, the Company will promptly send
additional copies of this Prospectus and any amendment or supplement to this
Prospectus to any Participating Broker-Dealer that requests such documents in
the Letter of Transmittal.





                                      124
<PAGE>   130
                                 LEGAL MATTERS

         The legality of the securities offered hereby will be passed upon for
the Company by Baker & Botts, L.L.P., Dallas, Texas.

                                    EXPERTS

         The consolidated financial statements of HighwayMaster Communications,
Inc. and its subsidiary as of December 31, 1995 and 1996 and for each of the
years in the three-year period ended December 31, 1996, included in this
Prospectus, have been audited by Price Waterhouse LLP, independent accountants,
as stated in their report appearing herein.





                                      125
<PAGE>   131
                                    GLOSSARY

      AIRTIME CHARGES:       Charges to users of wireless communications
                             systems based on the actual minutes of use.
        

      ANALOG:                A transmission method employing a continuous wave
                             to communicate information rather than a pulsed or
                             digital method. Most existing cellular and SMR
                             systems employ analog technology.
        

      A-SIDE AND B-SIDE:     The FCC permits only two cellular carriers to
                             compete in each cellular market, one from a group
                             of A-Side carriers which operate in one frequency
                             range and the other from a second frequency range,
                             the B-Side.
        

      AUTONOMOUS
      REGISTRATION:          Procedure whereby a cellular telephone
                             automatically identifies itself to the cellular
                             carrier as it enters a new cellular MSA or RSA,
                             allowing for automatic out-of-area call delivery.
                             Existing autonomous-registration call delivery
                             systems have very limited RSA participation
                             because of the high operating costs to cellular
                             carriers.
        

      CALL AUTHORIZATION:    Pre-authorization procedure undertaken by a
                             cellular carrier for outgoing calls from a
                             cellular telephone. Call authorization for an
                             out-of-area caller requires verification with his
                             home cellular carrier.
        

      CELLULAR:              The mobile radio service licensed by the FCC to
                             provide services on a common carrier basis
                             utilizing 50 MHZ of spectrum in the 800-MHZ band.
                             Cellular is the first mobile radio service to
                             broadly employ frequency reuse in its system
                             design, allowing for greatly expanded capacity and
                             reduced pricing.
        

      COMMON CARRIER:        An entity offering services that are for profit,
                             interconnected with the public switched telephone
                             network, and held out to the public without
                             restrictions and on a non-discriminatory basis.
        




                                      126
<PAGE>   132
      DIGITAL:               Describes a method of storing, processing and
                             transmitting information through the use of pulses
                             which represent numbers. Because digital systems
                             reduce all sound, information, or other data to
                             numeric values, as opposed to continuously
                             variable analog signals, digital systems allow for
                             rapid manipulation, processing, and storage of the
                             sound or other data by computer.
        

      DISPATCH:              A service provided to customers who want to
                             transmit and receive short messages to and from a
                             fleet of vehicles operating within range of the
                             system's repeater. Dispatch can be structured in a
                             one-to-one format or a one-to-many format between
                             Series 5000 Mobile Units and a fixed base station.
        

      EMPTY MILES:           Miles driven by a truck without a revenue-
                             generating load.


      ESMR:                  Enhanced Specialized Mobile Radio. ESMR is a
                             technology that has been developed specifically to
                             provide digital service using the SMR frequency
                             band. ESMR provides enhanced services such as
                             instant conferencing, mobile telephone, short-text
                             messaging with acknowledgment and data
                             transmission.
        

      FCC:                   Federal Communications Commission.


      FREQUENCY:             A point on the spectrum, measured in Hertz. Radio
                             transmitters are designed to transmit signals
                             utilizing a pre-selected frequency, and receivers
                             are designed to tune out all signals other than
                             signals of a pre-selected frequency. Two users
                             cannot broadcast simultaneously on identical
                             frequencies in the same location without
                             interference, creating the need for regulatory
                             bodies such as the FCC to allocate radio
                             frequencies.
        

      GEO-STATIONARY ORBIT:  An orbit 22,300 miles above the equator which
                             allows a satellite to orbit at the same speed as
                             the earth's rotation, remaining in a fixed
                             position over the earth. Existing satellite
                             communications systems utilize geo-stationary
                             satellites.
        

      GPS:                   Global Positioning System. A network of
                             navigational satellites maintained by the U.S.
                             Department of Defense which provides navigational
                             information to specialized radio receivers.
        

      GTE-TSI:               GTE Telecommunications Services Incorporated
                             and/or its affiliates.
        
        



                                      127
<PAGE>   133
      GTE WIRELESS:          GTE Wireless and/or its affiliates.


      HERTZ:                 The unit for measuring electromagnetic (including
                             radio) frequencies. One Hertz (abbreviated Hz)
                             equals one cycle per second; kHz (kilohertz)
                             stands for thousands of Hertz; MHZ (megahertz)
                             stands for millions of Hertz.
        

      HIGHWAYMASTER NETWORK: A private, wireless enhanced services
                             telecommunications network utilized by the
                             Company. This network integrates the following
                             principal elements utilizing the Company's
                             patented technology: (i) access to the cellular
                             infrastructure through contracts with more than 70
                             cellular carriers; (ii) call processing, data
                             management and related functions provided through
                             switching complexes operated by AT&T and the
                             Company; and (iii) call delivery information and
                             other "clearinghouse" services provided through
                             contracts with GTE-TSI and EDS.
        

      INCOMING CALL
      DELIVERY:              The ability of a cellular telephone system to
                             deliver a call to a mobile telephone (ring the
                             mobile telephone).
        

      INTERFACE:             Computer software and hardware which allow two
                             different computer systems to communicate with
                             each other or, as a verb, the action of
                             establishing such a connection.
        

      LEO:                   Low-earth orbit. LEO satellites orbit quickly
                             around the earth, requiring multiple satellites if
                             continuous communication is required in a specific
                             geographic location.
        

      LORAN-C:               Local Radio Aid to Navigation. A network of
                             navigational transmitters maintained by the U.S.
                             Coast Guard to provide navigational information to
                             specialized radio receivers in the continental
                             United States.
        

      LONG-HAUL:             Segment of the trucking industry which carries
                             freight over average distances of over 100 miles.
        

      LTL:                   Less-than-truckload; trucking companies that
                             utilize smaller local delivery trucks to pick up
                             less-than-truckload shipments for consolidation at
                             a depot before long-haul shipment.
        




                                      128
<PAGE>   134
      MEO:                   Middle-earth orbit. MEO satellites orbit at
                             distances from the earth that are greater than
                             LEOs but less than geo-stationary satellites.
        

      MODEM:                 Modulator-Demodulator. Converts digital data into
                             a form that can be transmitted over telephone
                             lines, and reconverts it to digital on the
                             receiving end.
        

      MSA:                   Metropolitan Statistical Area. MSAs are of two
                             types, cellular MSAs and census MSAs. Cellular
                             MSAs are determined by the FCC for the purpose of
                             granting licenses to provide cellular telephone
                             service within a particular area. Census MSAs are
                             determined by the U.S. Census Bureau for general
                             purposes. Cellular MSAs and census MSAs may differ
                             from area to area.
        

      PAGING:                A one-way messaging service generally transmitting
                             text messages of limited length to a compact
                             receiver while within range of the paging
                             company's transmitters.
        

      PCS:                   Personal Communications Services. PCS is an
                             all-digital wireless telephony service that
                             provides integrated services not currently offered
                             by traditional analog cellular providers and a
                             wider range of service options, including
                             integrated voice mail, enhanced custom-calling and
                             short-messaging. In the future, PCS systems may
                             offer high-speed data transmission to and from
                             computers, advanced paging services, facsimile
                             services and Internet access.
        

      PRIVATE CARRIER:       A for-profit operator of a private land mobile
                             service which does not resell for profit any
                             exchange or inter-exchange service or facility
                             which has been purchased from a common carrier.
        

      REAL-TIME:             A term used to describe a computer or
                             communications function which happens
                             instantaneously, while the system is in use, as
                             opposed to batched or store-and-forward methods
                             that record and store information for processing
                             or transmission at a later time.
        

      RESELLER:              A carrier that does not own transmission
                             facilities, but obtains communications services
                             from another carrier for resale to the public for
                             profit.
        

      RSA:                   Rural Service Area as defined by the FCC.





                                      129
<PAGE>   135
      SERIES 5000 MOBILE
      UNIT:                  The Series 5000 mobile communications unit,
                             including earlier fully-equipped versions, which
                             functions include voice communication, the
                             transmission and receipt of data messages,
                             navigational tracking, calculation of fuel taxes,
                             estimating times of arrival, storing data and
                             monitoring on-board electronic engine and other
                             electronic functions.
        

      SMR:                   Specialized Mobile Radio. SMR is a type of
                             wireless dispatch communications that is used
                             primarily as a business communications tool. The
                             service provides point-to-multipoint or
                             "one-to-many" voice communications. The FCC
                             allocated SMR operators a total of 19 MHZ of
                             spectrum, near the allocation for cellular
                             operators in the 800 and 900 MHZ bands. The FCC
                             regulated SMR differently from cellular, however,
                             leading SMR to develop networks based on
                             high-powered transmitters that precluded
                             increasing system capacity by reusing frequencies. 
                             Capacity restraints led SMR operators to focus on
                             dispatch service.
        

      SPECTRUM:              A term generally applied to the entire collection
                             of radio frequencies. Because two users can not
                             simultaneously broadcast on the same frequency in
                             the same location without interference, regulatory
                             bodies such as the FCC must pre- approve usage of
                             each portion of the spectrum.
        

      WIRELESS:              When used broadly, this term describes
                             telecommunications services that rely on radio
                             waves for communication rather than a land-line
                             link.
        




                                      130
<PAGE>   136

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>

                                                                                                       PAGE
                                                                                                       ----
<S>                                                                                                       <C>
CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 1995 AND 1996 AND FOR THE
   YEARS ENDED DECEMBER 31, 1994, 1995 AND 1996:

Report Of Independent Accountants...................................................................... F-2

Consolidated Balance Sheets At December 31, 1995 And 1996.............................................. F-3

Consolidated Statements Of Operations For The Years Ended
   December 31, 1994, 1995 And 1996.................................................................... F-4

Consolidated Statements Of Cash Flows For The Years Ended
   December 31, 1994, 1995 And 1996.................................................................... F-5

Consolidated Statements Of Changes In Partners' And Stockholders' Equity
   For The Years Ended December 31, 1994, 1995 And 1996................................................ F-6

Notes To Consolidated Financial Statements............................................................. F-7

CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 1996 AND JUNE 30, 1997 AND
   FOR THE SIX MONTHS ENDED JUNE 30, 1996 AND JUNE 30, 1997 (UNAUDITED):

Consolidated Balance Sheets At December 31, 1996 And June 30, 1997 (Unaudited)......................... F-24

Consolidated Statements Of Operations For The Six Months Ended June 30, 1996
   And June 30, 1997 (Unaudited)....................................................................... F-25

Consolidated Statements Of Cash Flows For The Six Months Ended June 30, 1996
   And June 30, 1997 (Unaudited)....................................................................... F-26

Consolidated Statement Of Changes In Stockholders' Equity For The Six Months
   Ended June 30, 1997 (Unaudited)..................................................................... F-27

Notes To Consolidated Financial Statements (Unaudited)................................................. F-28
</TABLE>




                                      F-1
<PAGE>   137


                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Stockholders of HighwayMaster
         Communications, Inc.

         In our opinion, the consolidated financial statements appearing on
pages F-3 through F-24 of this Prospectus, present fairly, in all material
respects, the financial position of HighwayMaster Communications, Inc. and its
subsidiary at December 31, 1995 and 1996, and the results of their operations
and their cash flows for each of the three years in the period ended December
31, 1996, in conformity with generally accepted accounting principles. 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 of these statements in accordance with
generally accepted auditing standards which 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, assessing the accounting principles used and significant estimates
made by management, and evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for the
opinion expressed above.


PRICE WATERHOUSE LLP



Dallas, Texas
February 10, 1997



                                      F-2
<PAGE>   138

               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY
                          CONSOLIDATED BALANCE SHEETS
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)
<TABLE>
<CAPTION>

                                     ASSETS
                                                                                        December 31,
                                                                                      1995        1996
                                                                                   ---------    ---------
<S>                                                                                <C>          <C>      
Current assets:
  Cash and cash equivalents ....................................................   $  23,969    $  19,725
  Accounts receivable, net of allowance for doubtful
     accounts of $815 and $774, respectively ...................................       5,949        8,537
  Other short-term receivables .................................................         803          919
  Inventory ....................................................................       4,199        3,458
  Prepaid expenses .............................................................         506          231
                                                                                   ---------    ---------
          Total current assets .................................................      35,426       32,870
Property and equipment, net of accumulated depreciation of
  $800 and $1,776, respectively ................................................       3,927        7,756
Long-term receivables ..........................................................       1,394        1,045
Deposits .......................................................................         112          309
Other assets, net of accumulated amortization of $1,125 and
  $1,024, respectively .........................................................       1,510          949
                                                                                   ---------    ---------
          Total assets .........................................................   $  42,369    $  42,929
                                                                                   =========    =========
                       LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable .............................................................   $   5,028    $   3,450
  Telecommunications costs payable .............................................       1,984        2,805
  Accrued interest payable to related parties ..................................         345           --
  Accrued warranty .............................................................         876          273
  Accrued loss on short-term contracts .........................................          --          570
  Other current liabilities ....................................................       1,421        1,167
                                                                                   ---------    ---------
          Total current liabilities ............................................       9,654        8,265
Notes payable to related parties ...............................................      11,488           --
                                                                                   ---------    ---------
Commitments and contingencies (Note 12)
          Total liabilities ....................................................      21,142        8,265
                                                                                   ---------    ---------
Series B redeemable preferred stock, $.01 par value, 10,000
  shares authorized; 1,080 and zero shares issued and
  outstanding, respectively ....................................................       8,126           --
                                                                                   ---------    ---------
Stockholders' equity:
  Series D participating convertible preferred stock, $.01 par value, 1,000
     shares authorized; zero and 1,000
     shares issued and outstanding at December 31, 1995 and ....................          --           --
     1996, respectively
  Common stock, $.01 par value, 50,000,000 shares
     authorized; 22,333,661 and 25,150,527 shares issued;
     22,021,664 and 24,838,530 shares outstanding at ...........................         223          251
     December 31, 1995 and 1996, respectively
  Additional paid-in capital ...................................................      90,560      144,829
  Accumulated deficit...........................................................     (77,135)    (109,869)
  Treasury stock, 311,997 shares, at cost.......................................        (547)        (547)
                                                                                   ----------   ---------             
                                                                                     
          Total stockholders' equity............................................      13,101       34,664
                                                                                   ---------    ---------
          Total liabilities and stockholders' equity............................    $ 42,369   $   42,929
                                                                                   =========    =========
</TABLE>



          See accompanying notes to consolidated financial statements.



                                      F-3
<PAGE>   139

               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                        (IN THOUSANDS, EXCEPT PER SHARE)

<TABLE>
<CAPTION>
                                                                       YEAR ENDED DECEMBER 31,
                                                                       -----------------------
                                                                    1994         1995         1996
                                                                    ----         ----         ----
<S>                                                                <C>         <C>         <C>     
Revenues:
  Product ......................................................   $ 11,075    $ 16,946    $ 14,645
  Service ......................................................      2,436       9,908      16,056
                                                                   --------    --------    --------
          Total revenues .......................................     13,511      26,854      30,701
                                                                   --------    --------    --------
Cost of revenues:
  Product ......................................................     11,867      17,730      15,099
  Service ......................................................      2,099       9,172      11,489
  Write-down of inventory ......................................      1,658          --       1,943
                                                                   --------    --------    --------
          Total cost of revenues ...............................     15,624      26,902      28,531
                                                                   --------    --------    --------
Gross profit (loss) ............................................     (2,113)        (48)      2,170
General and administrative expenses ............................      6,577       7,299       9,479
Sales and marketing expenses ...................................      3,890       6,273       9,139
Engineering expenses ...........................................      1,900       2,868       4,094
Customer service expenses ......................................      4,587       5,727       8,089
                                                                   --------    --------    --------
          Operating loss .......................................    (19,067)    (22,215)    (28,631)
Interest income ................................................        279       1,041         809
Interest expense to related parties ............................     (5,999)     (5,106)     (1,691)
Recapitalization costs .........................................       (733)         --          --
Other (expense) ................................................       (361)       (117)       (230)
                                                                   --------    --------    --------
          Loss before income taxes and extraordinary
            item ...............................................    (25,881)    (26,397)    (29,743)
Income tax provision ...........................................         --          --          --
                                                                   --------    --------    --------
          Loss before extraordinary item .......................    (25,881)    (26,397)    (29,743)
Extraordinary item-- loss on extinguishment of debt ............         --      (6,980)       (317) 
                                                                   --------    --------    --------
          Net loss .............................................   $(25,881)   $(33,377)   $(30,060)
                                                                   ========    ========    ========
Primary per share data:
  Loss before extraordinary item ...............................               $  (1.39)   $  (1.39)
  Extraordinary item ...........................................                  (0.34)      (0.01)
                                                                               --------    --------
  Net loss per share ...........................................               $  (1.73)   $  (1.40)
                                                                               ========    ========
Weighted average number of shares outstanding ..................                 20,407      22,763
                                                                               ========    ========
Pro forma per share data (unaudited):
  pro forma net loss per share .................................   $  (1.50)
                                                                   ========
  Weighted average number of shares outstanding used in the
     pro forma net loss per share calculation ..................     18,259
                                                                   ========
</TABLE>


          See accompanying notes to consolidated financial statements.



                                      F-4
<PAGE>   140

               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                     YEAR ENDED DECEMBER 31,
                                                                     -----------------------
                                                                  1994         1995        1996
                                                                  ----         ----        ----
<S>                                                             <C>         <C>         <C>      
Cash flows from operating activities:
  Net loss ..................................................   $(25,881)   $(33,377)   $(30,060)
  Adjustments to reconcile net loss to cash used in
     operating activities:
     Depreciation and amortization ..........................        825         886       1,651
     Amortization of discount on notes payable ..............      2,410       2,296         871
     Interest paid-in-kind ..................................        457          --          --
     Payment of debt issue costs ............................     (1,000)         --          --
     Extraordinary item .....................................         --       6,980         317
     (Increase) decrease in accounts receivable .............     (4,169)     (1,127)     (2,588)
     (Increase) decrease in other receivables ...............     (1,051)     (1,146)        233
     (Increase) decrease in inventory .......................       (182)       (669)        741
     (Increase) decrease in prepaid expenses and
       deposits .............................................         (3)       (386)         78
     Increase (decrease) in accounts payable ................      3,942        (906)     (1,578)
     Increase (decrease) in accrued expenses and other
       current liabilities ..................................      2,346       1,753         189
     Other ..................................................        219         (74)        329
                                                                --------    --------    --------
          Net cash used in operating activities .............    (22,087)    (25,770)    (29,817)
                                                                --------    --------    --------
Cash flows from investing activities:
  Additions to property and equipment .......................     (1,098)     (2,990)     (4,877)
  Additions to capitalized software .........................       (515)     (1,086)       (262)
                                                                --------    --------    --------
          Net cash used in investing activities .............     (1,613)     (4,076)     (5,139)
                                                                --------    --------    --------
Cash flows from financing activities:
  Proceeds from issuance of common stock, net ...............         --      72,774      10,000
  Proceeds from issuance of preferred stock and warrants,
     net ....................................................         --          --      19,688
  Proceeds from notes payable to related parties ............     35,000       4,122       5,000
  Payments on loans from related parties ....................     (7,225)    (27,239)     (5,000)
  Proceeds from exercise of stock options ...................         --          --       1,024
  Purchase of treasury shares ...............................       (547)         --          --
                                                                --------    --------    --------
          Net cash provided by financing activities .........     27,228      49,657      30,712
                                                                --------    --------    --------
Increase (decrease) in cash .................................      3,528      19,811      (4,244)
Cash and cash equivalents, beginning of period ..............        630       4,158      23,969
                                                                --------    --------    --------
Cash and cash equivalents, end of period ....................   $  4,158    $ 23,969    $ 19,725
                                                                ========    ========    ========
Supplemental cash flow information:
  interest paid .............................................   $  2,451    $  3,267    $  1,056
                                                                ========    ========    ========

</TABLE>


          See accompanying notes to consolidated financial statements.



                                      F-5
<PAGE>   141



               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

    CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' AND STOCKHOLDERS' EQUITY
                (DOLLARS IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
<CAPTION>
                                                                                                                             
                                                                         PREFERRED STOCK              COMMON STOCK
                                           GENERAL       LIMITED         ---------------       ---------------------------    
                                           PARTNERS      PARTNERS        SHARES    AMOUNT        SHARES            AMOUNT   
                                         -----------     --------        -----     ------      ----------         --------
<S>                                      <C>             <C>            <C>        <C>           <C>              <C> 
Partners' deficit at December 31,
  1993 ..............................    $    (5,193)     $  1,377          --     $    --              --        $     --   
  Recapitalization ..................          5,193        (1,377)        929          --      13,650,000             137      
  Issuance of common stock ..........                                                            4,154,329              41      
  Purchase of treasury stock ........        
  Accretion of discount -- Series                                                
    B redeemable preferred stock ....        
  net loss for year .................        
                                         -----------      --------       -----     -------      ----------        --------
Stockholders' equity (deficit) at                                                
  december 31, 1994 .................             --            --         929          --      17,804,329             178       
  Issuance of common                                                             
    stock -- Initial public                                                      
    offering ........................                                                            4,000,000              40 
  Issuance of common                                                             
    stock-- Note exchange ...........                                                              529,332               5  
  Accretion of discount-- Series                                                 
    B redeemable preferred stock ....      
  Cancellation of Series C                                                       
    preferred stock .................                                     (929)         --    
  Net loss for year .................        
                                         -----------      --------       -----     -------      ----------        --------
Stockholders' equity (deficit) at                                                
  December 31, 1995 .................             --            --          --          --      22,333,661             223 
  Issuance of common stock ..........                                                            1,818,018              18 
  Issuance of Series D preferred                                                 
    stock ...........................                                    1,000          --     
  Exchange of Series B preferred                                                 
    stock for common stock ..........                                                              864,000               9 
  Accretion of discount -- Series                                                
    B redeemable preferred stock ....         
  Exercise of stock options .........                                                              134,848               1  
  Net loss for year .................       
                                         -----------      --------       -----     -------      ----------        --------
Stockholders' equity (deficit) at                                                
  December 31, 1996 .................    $        --      $     --       1,000     $    --      25,150,527        $    251        
                                         ===========      ========       =====     =======      ==========        ========

<CAPTION>

                                               ADDITIONAL             TREASURY STOCK
                                                PAID-IN               --------------               ACCUMULATED
                                                CAPITAL           SHARES           AMOUNT            DEFICIT            TOTAL
                                              ---------           -------         ---------         ---------         --------
<S>                                           <C>               <C>               <C>               <C>               <C>      
Partners' deficit at December 31,         
  1993 ..............................         $      --                --         $      --         $      --         $ (3,816)
  Recapitalization ..................            (2,194)                                              (14,665)         (12,906)
  Issuance of common stock ..........             9,571                                                                  9,612
  Purchase of treasury stock ........                             311,997              (547)                              (547)
  Accretion of discount -- Series         
    B redeemable preferred stock ....                                                                  (1,235)          (1,235)
  net loss for year .................                                                                 (25,881)         (25,881)
                                              ---------           -------         ---------         ---------         --------
Stockholders' equity (deficit) at         
  december 31, 1994 .................             7,377           311,997              (547)          (41,781)         (34,773)
  Issuance of common                      
    stock -- Initial public               
    offering ........................            72,734                                                                 72,774
  Issuance of common                      
    stock-- Note exchange ...........            10,449                                                                 10,454
  Accretion of discount-- Series          
    B redeemable preferred stock ....                                                                  (1,977)          (1,977)
  Cancellation of Series C                
    preferred stock .................                                                                                       --   
  Net loss for year .................                                                                 (33,377)         (33,377)
                                              ---------           -------         ---------         ---------         --------
Stockholders' equity (deficit) at         
  December 31, 1995 .................            90,560           311,997              (547)          (77,135)          13,101
  Issuance of common stock ..........            22,707                                                                 22,725
  Issuance of Series D preferred          
    stock ...........................            19,688                                                                 19,688
  Exchange of Series B preferred          
    stock for common stock ..........            10,791                                                  (843)           9,957
  Accretion of discount -- Series         
    B redeemable preferred stock ....                                                                  (1,831)          (1,831)
  Exercise of stock options .........             1,083                                                                  1,084
  Net loss for year .................                                                                 (30,060)         (30,060)
                                              ---------           -------         ---------         ---------         --------
Stockholders' equity (deficit) at         
  December 31, 1996 .................         $ 144,829           311,997         $    (547)        $(109,869)        $ 34,664
                                              =========           =======         =========         =========         ========
</TABLE>

          See accompanying notes to consolidated financial statements.




                                      F-6
<PAGE>   142

               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  RECAPITALIZATION AND BUSINESS OVERVIEW

Recapitalization

         On April 24, 1992, By-Word Joint Venture L.P., a Delaware limited
partnership, was formed with one general partner, By-Word Technologies, Inc.
("By-Word") and one limited partner, the FBR Eighteen Corporation ("FBR"). FBR
was wholly-owned by the Eighteen Wheeler Corporation ("Eighteen Wheeler"). On
April 27, 1992, By-Word Joint Venture L.P. changed its name to HighwayMaster
L.P. (the "Partnership"). At December 31, 1993, the approximate percentages of
interest in the Partnership were as follows:

<TABLE>

<S>                                                              <C>   
By-Word......................................................    39.55%
FBR..........................................................    58.99%
Robert Hayes.................................................     1.08%
Robert Folsom................................................     0.38%
</TABLE>

         On February 4, 1994, the Company was recapitalized in a transaction
whereby, (i) holders of the stock of Eighteen Wheeler contributed such stock to
a newly formed entity, HM Holding Corporation, in exchange for promissory notes
in the aggregate principal amount of $9,291,050; 8,052,330 shares of common
stock; and 929.105 shares of Series A Preferred Stock, (ii) individual partners
contributed their interests in the Partnership to HM Holding Corporation in
exchange for promissory notes in the aggregate principal amount of $1,508,950;
198,900 shares of common stock; and 150.895 shares of Series A Preferred Stock
and (iii) By-Word contributed its interest in the Partnership and the residual
rights to certain intellectual property previously licensed to the Partnership
in exchange for 5,398,770 shares of common stock. The shares of Series A
Preferred Stock were subsequently canceled in exchange for which the prior
holders of stock in Eighteen Wheeler received 929.105 shares of Series B
Preferred Stock and 929.105 shares of Series C Preferred Stock, and the
individual partners received 150.895 shares of Series B Preferred Stock. As a
result of the foregoing transactions, Eighteen Wheeler became a wholly-owned
subsidiary of HM Holding Corporation. FBR and the Partnership were merged with
and into Eighteen Wheeler, and the name of the surviving corporation was
changed to HighwayMaster Corporation. By virtue of the merger, HighwayMaster
Corporation became the successor in interest to the Partnership. These
transactions are collectively referred to as the "Recapitalization."

         In connection with the Recapitalization, the Company paid an aggregate
of $733,000 in transaction and legal fees which were charged to earnings during
1994. Approximately $465,000 of these fees were paid to a stockholder of the
Company.

         From February 4, 1994 to December 31, 1994, certain stockholders of
the Company contributed a total of $35.0 million in cash in exchange for the
Company's common stock and notes payable (see Note 8).

         In February 1995, HM Holding Corporation changed its name to
HighwayMaster Communications, Inc. (the "Company"). Since the operations were
conducted solely by the Partnership and the Company and no other party to the
Recapitalization conducted operating activities, there was no change in the
historical cost basis of the Company's assets and liabilities. Unless otherwise
stated, references to the "Company" shall include HighwayMaster Communications,
Inc. (formerly HM Holding Corporation) and its subsidiary and its predecessors,
including the Partnership.



                                      F-7
<PAGE>   143

Business Overview

         From April 24, 1992 (inception) through June 1993, the Company was in
the development stage and its primary activities related to the design and
development of its products. The Company began selling its products in the
third quarter of 1993.

         The Company operates a wireless enhanced-services network with both
voice and data capabilities in 99% of the available cellular coverage areas in
the United States and 100% of the ASide cellular coverage areas in Canada. The
Company's private network covers approximately 95% of the United States
interstate highway system. Through this private network, the Company provides
integrated mobile voice, data, tracking, and fleet management information
services to trucking companies and private truck operators in the long-haul
segment of the transportation industry.

         The HighwayMaster system includes a Mobile Communication Unit (the
"Mobile Communication Unit" or "Unit") installed in each truck and a
proprietary dispatch software package developed by the Company for use by
trucking companies. The Mobile Communication Unit transmits and receives voice
and data communication to and from long-haul trucks through the Company's
private network. In addition, the Unit contains a sophisticated navigational
tracking device that enables dispatchers to obtain accurate position reports
for trucks located anywhere in the United States and Canada. The Company's
dispatch software package enables a trucking company to optimize the use of its
fleet by processing data transmitted by Mobile Communication Units and
performing a variety of fleet management functions.

         In the fourth quarter of 1996, the Company entered into a strategic
business alliance with Prince Corporation ("Prince"), a subsidiary of Johnson
Controls, Inc., to develop and provide AutoLink service for motorists in the
United States and Canada. The basic AutoLink Product will provide an
intelligent communications link from the car to an information services complex
in order to provide emergency assistance, roadside assistance and information
services to the occupants of the car, including remote tracking of stolen or
missing vehicles. HighwayMaster will be responsible for managing the network,
providing software for the intelligent mobile unit in the car and assisting in
managing various information services providers. The AutoLink business alliance
is currently in its preliminary stages and no revenues will be realized by the
Company from AutoLink in 1997.

2.  STOCK SPLIT

         On May 26, 1995, the Company's board of directors authorized, and a
majority of stockholders approved, a one thousand nine hundred and
fifty-for-one (1,950 for 1) common stock split effected in the form of a stock
dividend, payable to shareholders of record on May 26, 1995. The stock split
has been given retroactive effect to January 1, 1994 (the year in which the
Recapitalization to a corporate structure took place) in the accompanying
financial statements.

3.  COMPLETION OF INITIAL PUBLIC OFFERING AND NOTE EXCHANGE

         On June 28, 1995, the Company completed its initial public offering
(the "Offering") of 4,000,000 shares of common stock at a price of $19.75 per
share. Proceeds from the Offering totaled $72,774,000, net of underwriters'
discounts and other offering expenses totaling $6,226,000.

         A portion of the proceeds from the Offering was used to retire notes
payable to related parties in the aggregate principal amount of $27,239,000
(see Note 8). In addition, 529,332 shares of common stock were issued to retire
notes payable to related parties (the "Note Exchange") in the aggregate
principal amount of $10,454,000. In connection with the foregoing, the
unamortized balances of debt discount and debt issue costs associated with the
indebtedness retired, in the aggregate amount of $6,980,000, were charged to
expense and are reported in the accompanying consolidated statements of
operations as an extraordinary item, "loss on extinguishment of debt."



                                      F-8
<PAGE>   144


4.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

         The consolidated financial statements include those of HighwayMaster
Communications, Inc. and HighwayMaster Corporation. All significant
intercompany accounts and transactions have been eliminated in consolidation.

Estimates Inherent in the Preparation of Financial Statements

         The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make 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 and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Revenue Recognition

         Revenues from equipment sales and licensing of equipment software are
generally recognized at the time the Units are shipped to customers. In certain
cases the Company has installed Units in customers' trucks on a trial basis,
permitting customers to return the Units with limited or no penalty. In such
cases, the Company recognizes revenue when the trial period expires. Revenues
generated from voice and data communications services are recognized upon
customer usage. Until 1996, AT&T invoiced and collected payments from all of
the Company's customers for voice and data communication services associated
with the Company's equipment. The Company records as revenue an amount equal to
the payments received from AT&T, and the remainder of these service charges,
including amounts for call processing, enhanced long distance services and
customer collection fees, is retained by AT&T under the terms of the AT&T
Contract (see Note 11). Beginning in the third quarter of 1996, the Company
started providing customer billing, credit and collection activities for voice
and data communication services for certain customers.

Cash and Cash Equivalents

         Cash and cash equivalents include cash on hand and investments with
purchased original maturities of three months or less. Such investments consist
of short-term commercial paper, U.S. Government and U.S. Government Agency
obligations, and money-market accounts. The Company has approximately
$19,500,000 of cash and cash equivalents in excess of FDIC insured limits at
December 31, 1996. The Company has not experienced any losses on its cash and
cash equivalents.

Business and Credit Concentrations

         The majority of the Company's business activities and related accounts
receivable are with customers in the interstate trucking industry. The
receivables generated from equipment sales are generally secured by the
respective Units shipped to the customer. Allowances have been provided for
amounts which may eventually become uncollectible and to provide for any
disputed charges. No customer accounted for more than 10% of total consolidated
revenues for the years ended December 31, 1995 and 1996. During 1994, one
interstate trucking company accounted for approximately $2.8 million, or 21%,
of total consolidated revenues.

Inventory

         Inventory consists primarily of component parts and finished products
which are valued at the lower of cost or market. Cost is determined using the
first-in, first-out (FIFO) method.



                                     F-9
<PAGE>   145

Property and Equipment

         Property and equipment are stated at cost and are depreciated on a
straight-line basis over the estimated useful lives of the various classes of
assets, which range from three to five years. Maintenance and repairs are
charged to operations while renewals or betterments are capitalized.

Accrued loss on short-term contracts

         The Company contracts with existing customers to upgrade previously
installed earlier generation Mobile Communication Units to current generation
Units. In the event the cost of the equipment to be provided for upgrade
contracts is expected to exceed the sum of the upgrade contract price and the
estimated fair market value of the equipment to be returned as a result of the
upgrade, a loss is recognized.

Research and Development Costs

         The Company expenses research and development costs as incurred.
During 1994, 1995 and 1996, the Company expensed $1,211,000, $1,539,000 and
$1,294,000 in research and development costs for hardware and software that are
reflected in Engineering Expenses in the Consolidated Statements of Operations.

Software Development Costs

         Purchased computer software costs are amortized using the
straight-line method over expected useful lives which range from 18 to 60
months. Payments to the Company's service providers for software enhancements,
to which the service providers retain ownership, are capitalized as software
development costs. These costs are amortized over the lives of the service
contracts, varying from 12 to 36 months.

         Costs related to the research, design and development of computer
software are charged to research and development expense as incurred. During
1994, 1995, and 1996, the Company expensed $330,000, $804,000, and $673,000,
respectively, in research and development costs that are reflected in
Engineering Expenses in the Consolidated Statements of Operations. Software
development costs that meet the capitalization requirements of Statement of
Financial Accounting Standards No. 86, "Accounting for the Costs of Computer
Software to be Sold, Leased, or Otherwise Marketed" are capitalized. Software
development costs are amortized using the straight line method over eighteen
months or the estimated economic life of the product, whichever is less.

         As of December 31, 1995 and 1996, the unamortized portion of computer
software costs was $1,199,000 and $873,000, respectively. Amortization of such
costs charged to expense during 1994, 1995, and 1996 was $223,000, $278,000,
and $504,000, respectively.

Advertising Costs

         Advertising costs are expensed as incurred. During 1994, 1995, and
1996 the Company expensed $941,000, $2,041,000 and $1,637,000, respectively, in
advertising costs that are reflected in Sales and Marketing Expenses in the
Consolidated Statements of Operations.

Income Taxes

         The Company accounts for income taxes pursuant to Statement of
Financial Accounting Standards No. 109, "Accounting For Income Taxes" ("SFAS
109"). Deferred income taxes are calculated using an asset and liability
approach wherein deferred taxes are provided for the tax effects of basis
differences for assets and liabilities arising from differing treatments for
financial and income tax reporting purposes. Valuation allowances against
deferred tax assets are provided where appropriate.




                                     F-10
<PAGE>   146

Earnings Per Share

         Net loss per share for the years ended December 31, 1995 and 1996
("primary loss per share") was computed by dividing the net loss, increased by
the accretion of discount on the Series B Preferred Stock ($1,977,000 and
$1,831,000 in 1995 and 1996, respectively), by the weighted average number of
shares outstanding during the year.

         Stock options granted with exercise prices below the $19.75 initial
public offering price and shares of common stock issued during the twelve-month
period preceding the initial filing date of the Offering have been included in
the calculation of weighted average shares outstanding through the date of the
Offering (June 28, 1995). The stock options were included in the calculation of
common stock equivalents using the treasury stock method. Stock options are
excluded from the calculation of weighted average shares outstanding subsequent
to the date of the Offering since their effect would be anti-dilutive.

         Pro forma net loss per share (unaudited) was computed by dividing the
pro forma net loss for the year ended December 31, 1994 by the pro forma
weighted average number of shares outstanding during the year. Pro forma net
loss was calculated by increasing the net loss for 1994 by $1,481,000,
representing interest expense on the $10.8 million of notes payable related to
the Recapitalization for the period January 1, 1994 to February 4, 1994
($134,000) and the accretion of discount on the Series B Preferred Stock for
the period from January 1, 1994 to December 31, 1994 ($1,347,000). The pro
forma weighted average number of shares was calculated assuming that all shares
issued in the Recapitalization were issued as of January 1, 1994.

         Supplemental net loss per share (unaudited) is presented below to show
what loss per share would have been for 1996 assuming the shares issued in
September 1996 to retire indebtedness and the Series B Preferred Stock had been
issued as of January 1, 1996 and the associated indebtedness and Series B
Preferred Stock had been retired as of January 1, 1996. Supplemental net loss
per share (unaudited) for the year ended December 31, 1996 is based on the
weighted average number of shares of common stock used in the primary loss per
share calculation plus the number of additional weighted average shares
(1,384,648) that would have been outstanding had $12,662,000 of indebtedness
and $10,800,000 of Series B Preferred Stock been retired at January 1, 1996.
For the purposes of computing supplemental net loss per share (unaudited), the
net loss for the year ended December 31, 1996 was increased by $1,831,000 for
the accretion of discount on the Series B Preferred Stock and was reduced by
$1,659,000 and $1,831,000 for the interest expense on the indebtedness and the
accretion of discount on the Series B Preferred Stock, respectively.
Supplemental net loss per share (unaudited) for the year ended December 31,
1996 is as follows:

<TABLE>
<S>                                                                          <C>            
Supplemental net loss before extraordinary item ..........................   $        (1.17)
Extraordinary item .......................................................             (.01)
                                                                             --------------
Supplemental net loss per share ..........................................   $        (1.18)
                                                                             ==============
Weighted average number of shares outstanding used in the supplemental net
  loss per share calculation .............................................       24,147,512
                                                                             ==============
</TABLE>

Fair Value of Financial Instruments

         The carrying amount of cash and cash equivalents, accounts receivable,
accounts payable and accrued liabilities approximates fair value because of
their short-term maturity.

Reclassifications

         Certain operating expenses for 1994 and 1995 have been reclassified to
conform to the 1996 presentation.



                                     F-11
<PAGE>   147

5.  LEASING OPERATIONS

         The Company leases its products to certain customers with terms
ranging from three to five years. The related contracts are accounted for as
sales-type leases. As of December 31, 1996, minimum future lease payments
expected to be received were:

<TABLE>
<C>                                                    <C>        
1997 ...............................................   $   513,000
1998 ...............................................       513,000
1999 ...............................................       445,000
2000 ...............................................       154,000
                                                       -----------
          Total minimum future lease payments ......     1,625,000
Less: unearned interest income .....................      (157,000)
                                                       -----------
          Total receivable balance .................   $ 1,468,000
                                                       ===========
 
</TABLE>

         Of the receivable balance above, $423,000 is included in other
short-term receivables and $1,045,000 is included in long-term receivables in
the Consolidated Balance Sheet at December 31, 1996.

         In March 1997, a customer who represents $1,239,000 of the total
receivable balance notified the Company that they intended to terminate their
long-term lease commitment. Although the lease agreement contains termination
penalties, the Company believes that it may be necessary to write-off a portion
of the receivable as a result of the lease termination. The Company estimates
that the amount of the write-off may range from approximately $500,000 to
$1,000,000, although the Company is continuing to evaluate its position under
the lease and no final decision has been reached. No provision for loss has
been recorded in the Consolidated Financial Statements.

6.  INVENTORY

         Inventory consisted of the following:

<TABLE>
<CAPTION>
                                                                  December 31
                                                          --------------------------
                                                             1995             1996
                                                          ----------      ----------
<S>                                                       <C>             <C>       
Complete systems......................................    $1,968,000      $1,265,000
Component parts.......................................     2,231,000       2,193,000
                                                          ----------      ----------
                                                          $4,199,000      $3,458,000
                                                          ==========      ==========
</TABLE>

         During 1996, the Company recorded a write-down of approximately $1.9
million to adjust the carrying value of used earlier generation mobile unit
component parts inventory to its estimated net realizable value.

7.  PROPERTY AND EQUIPMENT

Property and equipment consisted of the following:

<TABLE>
<CAPTION>
                                              December 31
                                      --------------------------
                                         1995             1996
                                      -----------    -----------
<S>                                   <C>            <C>        
Machinery and equipment ...........   $ 1,692,000    $ 2,234,000
Vehicles ..........................       370,000        370,000
Computers and office equipment ....     1,166,000      2,087,000
Network Services Center ...........            --      4,841,000
Construction-in-progress ..........     1,499,000             --
                                      -----------    -----------
                                        4,727,000      9,532,000
Less: accumulated depreciation ....      (800,000)    (1,776,000)
                                      -----------    -----------
                                      $ 3,927,000    $ 7,756,000
                                      ===========    ===========
</TABLE>




                                     F-12
<PAGE>   148

         Total depreciation expense charged to operations during 1994, 1995 and
1996 was $296,000, $395,000 and $1,041,000, respectively.

8.  NOTES PAYABLE TO RELATED PARTIES

         As a part of the Recapitalization, the Company issued promissory notes
in the amount of $10.8 million, 13,650,000 shares of common stock, 1,080 shares
of Series B Preferred Stock and 929 shares of Series C Preferred Stock (see
Note 1).

         Also as part of the Recapitalization, the holders of the stock of
Eighteen Wheeler contributed such stock to the Company in exchange for notes in
the aggregate principal amount of approximately $9.3 million, 8,052,330 shares
of common stock and 929.1 shares of Series A Preferred Stock; individual
partners contributed their interest in the Partnership to the Company in
exchange for notes in the aggregate principal amount of approximately $1.5
million, 198,900 shares of common stock and 150.895 shares of Series A
Preferred Stock; and By-Word contributed its interest in the Partnership and
the residual rights to certain intellectual property previously licensed to the
Partnership in exchange for 5,398,770 shares of common stock. The Company also
entered into a Subscription Agreement dated February 4, 1994 (the "Subscription
Agreement") providing for the sale by the Company of up to $45 million
aggregate principal amount of promissory notes and up to an aggregate of
5,850,000 shares of common stock of the Company. Pursuant to the Subscription
Agreement, (i) on February 4, 1994, the Company issued $10.0 million aggregate
principal amount of promissory notes and 975,000 shares of common stock of the
Company for $10.0 million; (ii) on March 28, 1994, the Company issued $20.0
million aggregate principal amount of promissory notes and 2,437,500 shares of
common stock for $20.0 million; and (iii) on October 17, 1994, the Company
issued $5.0 million aggregate principal amount of promissory notes and 741,848
shares of common stock for $5.0 million. The coupon interest rate on the
outstanding principal amount of the notes was 8% per annum. The notes were
discounted using an effective borrowing rate of approximately 18%.

         Pursuant to the Note Exchange Agreement entered into in May 1995, the
Company and noteholders agreed to modify the requirements for repayment of the
notes upon closing of a public offering. Accordingly, upon completion of the
Offering (see Note 3) (i) 50% of the outstanding principal amount of the notes
held by members of the Carlyle Group, Clipper and Chase were paid in cash from
proceeds of the Offering, an aggregate of $5.0 million of the principal amount
of such notes were exchanged for common stock at the Offering price (but not
registered for sale in the Offering), and the remaining principal balance of
the notes held by such noteholders continue to be held by such noteholders
after the Offering; (ii) 50% of the outstanding principal amount of the notes
held by Erin Mills affiliates were paid in cash from the proceeds of the
Offering, and the remaining principal balance of the notes held by Erin Mills
affiliates were exchanged for common stock at the Offering price (but not
registered for sale in the Offering); (iii) 50% of the notes held by Mr. Folsom
and Mr. Hayes were paid in cash from the proceeds of the Offering, and the
remaining principal balance of the notes held by Mr. Folsom and Mr. Hayes were
exchanged for common stock at the Offering price (but not registered for sale
in the Offering) and; (iv) the maturity date for the principal amount of the
notes was changed to December 31, 1996.

         In April 1995, May 1995 and June 1995, certain stockholders of the
Company, other than certain management stockholders, entered into Note Purchase
Agreements with the Company pursuant to which such stockholders purchased pro
rata, in proportion to their stock ownership, short-term 9% promissory notes
from the Company in the aggregate principal amount of $1.6 million, $1.4
million and $1.1 million, respectively. These notes, together with accrued
interest thereon, were repaid in June, 1995 with proceeds from the Offering.

         Pursuant to the Note Exchange Agreement and the Note Purchase
Agreements an aggregate principal amount of $27,239,000 of notes payable to
related parties were repaid with proceeds from the Offering. In addition,
529,332 shares of common stock were issued to retire notes payable to related
parties (the "Note Exchange") in the aggregate principal amount of $10,454,000.
In connection with the foregoing, the unamortized balances of debt discount and
debt issue costs associated with the indebtedness retired, in the aggregate
amount of $6,980,000 were charged to expense and are reported in the
accompanying consolidated statements of operations as an extraordinary item,
"loss on extinguishment of debt."




                                     F-13
<PAGE>   149

         After the above repayments, $12,662,000 principal amount of notes
payable to related parties remained outstanding at December 31, 1995. These
notes had an 8% per annum coupon rate and a maturity date of December 31, 1996.
The notes were discounted using an effective borrowing rate of approximately
18%.

         On March 29, 1996, the Company and the noteholders entered into a Note
Extension Option Agreement (the "Extension Option"). Under the Extension
Option, the Company had the unilateral right to elect to extend the maturity
date of the notes to June 30, 1997. Because of the availability of the
Extension Option to the Company, the notes were classified as a long-term
liability at December 31, 1995.

         On September 27, 1996, the Company, the Erin Mills Stockholders, the
Carlyle Stockholders and certain other holders of outstanding securities of the
Company entered into a Recapitalization Agreement (the "1996 Recapitalization
Agreement"), and consummated the 1996 Recapitalization Transactions
contemplated thereby. In particular, upon the terms and conditions set forth in
the 1996 Recapitalization Agreement, (i) the Company repaid in full the
principal amount of and interest accrued on certain promissory notes in the
aggregate principal amount of $5.0 million executed in favor of an Erin Mills
Stockholder in order to repay certain advances made by such Erin Mills
Stockholder in August and September 1996 to enable the Company to meet its
short-term working capital and other requirements, (ii) the Company issued an
aggregate of 800,000 shares of Common Stock to two Erin Mills Stockholders in
exchange for aggregate cash payments in the amount of $10.0 million, (iii) the
Company issued an aggregate of 864,000 shares of Common Stock to three Erin
Mills Stockholders and two other persons in exchange for the surrender to the
Company for cancellation of all outstanding shares of Series B Preferred Stock,
(iv) the Company paid to the Carlyle Stockholders a portion of the accrued and
unpaid interest on certain promissory notes in the aggregate principal amount
of $12,662,000 (the "Carlyle Notes") executed in favor of the Carlyle
stockholders, and (v) the Company issued an aggregate of 1,018,018 shares of
Common Stock in exchange for the surrender of the Carlyle Notes for
cancellation. In connection with the foregoing, the unamortized balances of
debt discount and debt issue costs associated with the indebtedness retired, in
the aggregate amount of $317,000, were charged to expense and are reported in
the accompanying consolidated statements of operations as an extraordinary
item, "loss on extinguishment of debt."

9.  INCOME TAXES

         As discussed in Note 1, the Company's predecessor business activities
prior to February 4, 1994 were conducted as a Partnership which was not subject
to income tax. The profits and losses of the Partnership were reflected on the
tax returns of the individual partners. Accordingly, the financial statements
of the Partnership for periods prior to February 4, 1994 do not include any
provision for income taxes.

         Effective with the Recapitalization on February 4, 1994, the Company
became a corporation and the consolidated financial statements reflect the tax
effects of the Company's activities from that date. The tax effects for the
period January 1 to February 4, 1994 and arising from the Company's conversion
to a corporation on February 4, 1994 were not material.



                                     F-14
<PAGE>   150

         The components of the Company's net deferred tax asset were as
follows:

<TABLE>
<CAPTION>
                                                                   December 31
                                                          ----------------------------
                                                               1995            1996
                                                          ------------    ------------
<S>                                                       <C>             <C>         
Deferred tax assets
  Step-up of tax basis in assets ......................   $  1,183,000    $  1,543,000
  Research and development credit .....................        340,000         254,000
  Accrued warranty ....................................        298,000          93,000
  Recapitalization costs ..............................        369,000         266,000
  Allowance for doubtful accounts .....................        277,000         263,000
  Accrued interest ....................................        590,000         332,000
  Inventory ...........................................        146,000         104,000
  Accrued vacation ....................................         89,000          67,000
  Net operating loss carryforwards ....................     18,457,000      32,352,000
                                                          ------------    ------------
  Gross deferred tax assets ...........................     21,749,000      35,274,000
  Valuation allowance .................................    (21,551,000)    (34,745,000)
                                                          ------------    ------------
  Net deferred tax asset ..............................        198,000         529,000
Deferred tax liability
  Depreciation ........................................       (158,000)       (460,000)
  Other ...............................................        (40,000)        (69,000)
                                                          ------------    ------------
Net deferred tax asset ................................   $         --    $         --
                                                          ============    ============
</TABLE>

         The following is a reconciliation of the provision for income taxes at
the U.S. federal income tax rate to the income taxes reflected in the
Consolidated Statements of Operations:




                                     F-15
<PAGE>   151
<TABLE>
<CAPTION>
                                                                    December 31
                                                     ------------------------------------------
                                                         1994           1995            1996
                                                     -----------    -----------    ------------ 
<S>                                                  <C>            <C>            <C>          
Income tax benefit at Federal statutory rate .....   $(8,800,000)   $(8,784,000)   $(10,220,000)
Net operating losses not benefitted ..............     8,761,000      8,735,000      10,146,000
Other ............................................        39,000         49,000          74,000
                                                     -----------    -----------    ------------ 
          Income tax benefit .....................   $        --    $        --    $         --
                                                     ===========    ===========    ============ 
</TABLE>

         At December 31, 1996, the Company had net operating loss carryforwards
aggregating approximately $95.2 million which expire in various years between
2007 and 2011. Due to the issuance of certain notes payable in connection with
the Recapitalization discussed in Note 8, there was a change in ownership under
the Internal Revenue Code which limits the annual utilization of these
carryforwards and will cause some amount of the carryforwards to expire
unutilized. Any additional changes in ownership subsequent to the
Recapitalization could also result in additional limitations of loss
carryforwards.

10. PARTNERS'/STOCKHOLDERS' EQUITY INSTRUMENTS AND RELATED MATTERS

Issuance of Series D Preferred Stock

         On September 27, 1996, the Company and Southwestern Bell Wireless
Holdings, Inc. ("SBW"), a wholly owned subsidiary of SBC Communications Inc.
("SBC"), consummated certain transactions, including but not limited to (i) the
issuance of 1,000 shares of a new series of preferred stock, par value $0.01
per share, designated as Series D Participating Convertible Preferred Stock
("Series D Preferred Stock") in consideration of a cash payment in the amount
of $20.0 million and (ii) the issuance to SBW of certain Warrants.

         Each outstanding share of Series D Preferred Stock is convertible into
1,600 shares of Common Stock at the option of SBW. In addition, at such time as
SBW obtains certain regulatory relief required in order for it to offer
long-distance telephone services, all outstanding shares of Series D Preferred
Stock will automatically convert into an equal number of shares of a new series
of common stock designated as Class B Common Stock.

         Each outstanding share of Class B Common Stock will be convertible
into 1,600 shares of Common Stock at the option of SBW. The holders of Class B
Common Stock will be entitled to receive dividends and liquidating
distributions in an amount equal to the dividends and liquidating distributions
payable on or in respect of the number of shares of Common Stock into which
such shares of Class B Common Stock are then convertible. The holders of Common
Stock and Class B Common Stock will generally have identical voting rights and
will vote together as a single class, with the holders of Class B Common Stock
being entitled to a number of votes equal to the number of shares of Common
Stock into which the shares of Class B Common Stock held by them are then
convertible. In addition, the holders of Class B Common Stock will be entitled
to elect one director of the Company (or two directors if SBW and its
affiliates beneficially own at least 20% of the outstanding shares of Common
Stock on a fully diluted basis) and will have the right to approve certain
actions on the part of the Company.

         The Warrants issued to SBW entitle the holder thereof to purchase (i)
3,000,000 shares of Common Stock at an exercise price of $14.00 per share and
(ii) 2,000,000 shares of Common Stock at an exercise price of $18.00 per share.
The Warrants will expire on September 27, 2001.

Series B Preferred Stock

         As part of the Recapitalization described in Note 1, the Company
issued 1,080 shares of its Series A Preferred Stock. On February 28, 1994, all
shares of the Series A Preferred Stock were reacquired by the Company and the




                                     F-16
<PAGE>   152

respective holders were issued shares of Series B and Series C Preferred Stock.
The Preferred Stock was recorded at its fair value as of the date of issuance.
The Series C Preferred Stock was canceled in 1995.

         The Series B Preferred Stock was required to be redeemed by the
Company at a price of $10,000 per share ($10,800,000 in the aggregate) if the
purchasers of the notes and common stock under the Subscription Agreement had
realized a certain required return (as defined) on their investment in the
Company. In contemplation of the transactions consummated on September 27,
1996, it was determined that the Series B Preferred Stock would qualify for
redemption at its maturity date, February 4, 1997. Accordingly, the Series B
Preferred Stock was extinguished pursuant to the 1996 Recapitalization
Agreement by the issuance of 864,000 shares of Common Stock (see Note 8).

Settlement Agreement and By-Word Exchange Agreement

         In connection with a lawsuit brought by a former employee of By-Word
and the employee's spouse (collectively, the "Plaintiffs") against By-Word, the
Company and certain of its stockholders and affiliates (collectively, the
"Defendants"), in which the Plaintiffs alleged certain claims for, among other
things, breach of employment and personal injury, the Plaintiffs entered into a
Compromise Settlement and Mutual Release, in September 1994 (the "Settlement
Agreement"), pursuant to which the plaintiffs rescinded the original purchase
of the shares of By-Word, and the Plaintiffs settled all claims against the
Defendants in exchange for $1,653,000 (the "Settlement Amount"). The Company
loaned By-Word the Settlement Amount pursuant to a promissory note dated
September 30, 1994, in the amount of $1,653,000 (the "By-Word Note") to pay the
Plaintiffs under the Settlement Agreement.

         Pursuant to an agreement dated October 1, 1994, between the Company
and By-Word (the "By-Word Exchange Agreement"), By-Word contributed 5,398,770
shares of the Company's common stock to the Company in exchange for which the
Company issued 5,086,773 shares of the Company's common stock to By-Word and
assumed By-Word's obligations under the By-Word Note. The Company recorded the
transaction as an increase in treasury shares. The obligations assumed from
By-Word by the Company were in excess of the fair value of the stock received;
therefore, the amount of $1,106,000 of obligations assumed over the fair value
of the stock was recorded as an expense that is reflected in General and
Administrative Expenses in the 1994 Consolidated Statement of Operations.
By-Word instituted dissolution proceedings on November 30, 1994 and distributed
its shares of common stock of the Company then held by By-Word pro rata to the
former shareholders of By-Word.

Incentive Plan and Other

         Pursuant to a 1994 Stock Option Plan, as amended, (the "Plan") options
may be granted to employees for the purchase of an aggregate of up to 2,474,462
shares of the Company's common stock. The Plan requires that the exercise price
for each stock option be not less than 100% of the fair market value of common
stock at the time the option is granted. Both nonqualified stock options and
incentive stock options, as defined by the Internal Revenue Code of 1986, as
amended, may be granted under the Plan. Options granted under the Plan vest 20%
on the date of grant and 20% on each of the following four anniversary dates of
the date of grants and expire six years from the date of grant.

         The Company applies APB Opinion No. 25 and related interpretations in
accounting for the Plan. Accordingly, no compensation cost has been recognized
for options issued under the Plan. Had compensation cost been determined based
on the fair market value at the grant dates for awards under the Plan
consistent with the method provided by SFAS 123, the Company's net loss and net
loss per share would have been increased to the pro forma amounts indicated
below:

<TABLE>
<CAPTION>
                                                                       For the Year Ended December 31,
                                                                     ----------------------------------
                                                                         1995                    1996
                                                                     ------------          ------------ 
<S>                                                  <C>             <C>                   <C>          
Net loss............................................ As reported     $(33,377,000)         $(30,060,000)
                                                     Pro forma       $(33,458,000)         $(30,584,000)
Primary net loss per share.......................... As reported     $      (1.73)         $      (1.40)
                                                     Pro forma       $      (1.74)         $      (1.42)

</TABLE>



                                     F-17

<PAGE>   153

         The fair value of each option grant is estimated on the date of grant
using the Black-Scholes option pricing model with the following weighted
average assumptions used for grants during the years ended December 31, 1995
and 1996:

<TABLE>
<CAPTION>
                                      FOR THE YEAR ENDED
                                         DECEMBER 31,
                                      ------------------
                                       1995       1996
                                       ----       ----
<S>                                   <C>        <C>   
Dividend .....................          --         --
Expected volatility ..........        70.90%     74.02%
Risk free rate of return .....         6.80%      6.24%
Expected life in years .......         6.00       6.00
</TABLE>

         A summary of the status of the Company's Plan as of December 31, 1994,
1995 and 1996, and changes during the years ended on those dates is presented
below:

<TABLE>
<CAPTION>
                                                        1994                             1995                                 1996
                                                       WEIGHTED                         WEIGHTED                            WEIGHTED
                                                       AVERAGE                          AVERAGE                             AVERAGE
                                                       EXERCISE                         EXERCISE                            EXERCISE
                                      SHARES            PRICE          SHARES             PRICE          SHARES              PRICE
                                     ---------         ---------      ---------         ---------       ---------          --------
<S>                                  <C>               <C>            <C>               <C>             <C>                <C>     
Outstanding at beginning of       
  year ........................             --             --         1,947,144         $    7.58       1,974,462          $   7.58
Granted .......................      1,947,144         $    7.58         27,318              7.58         266,000              7.73
Exercised .....................             --             --                --             --           (134,848)             7.59
Forfeited .....................             --             --                --             --            (62,316)             7.62
                                     ---------         ---------      ---------         ---------       ---------          --------
Outstanding at end of year ....      1,947,144         $    7.58      1,974,462         $    7.58       2,043,298          $   7.61
                                     =========         =========      =========         =========       =========          ========
Options exercisable at end        
  of year .....................      1,338,994         $    7.58      1,496,496         $    7.58       1,565,165          $   7.58
                                     =========         =========      =========         =========       =========          ========
Weighted average value of         
  options granted during the      
  year ........................                                                         $    12.77                         $   5.51
                                                                                        ==========                         ========
</TABLE>                          
                                  
                                  


                                     F-18

<PAGE>   154

The following table summarizes information about stock options outstanding
under the Plan at December 31, 1996:

<TABLE>
<CAPTION>
                                                                                      OPTIONS               OPTIONS
                                                                                    OUTSTANDING           EXERCISABLE
                                                                                    -----------           -----------
 <S>                                                                             <C>                   <C>
 Number of options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,043,298             1,565,165
                                                                                                      
 Range of exercise prices  . . . . . . . . . . . . . . . . . . . . . . . . .     $7.58 to $7.75        $7.58 to $7.75
 Weighted average remaining contractual
   life in years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                3.8                   3.6
 Weighted average exercise price . . . . . . . . . . . . . . . . . . . . . .              $7.61                 $7.58
</TABLE>

         During April 1995, the Company granted options outside of the Plan to
a director of the Company to purchase 3,798 shares of common stock. The options
were immediately exercisable for a term of six years at a price of $7.58 per
share. The fair value of the option grant was estimated to be approximately
$12.79 per option on the date of grant using the Black-Scholes option pricing
model with the following weighted average assumptions: no expected dividend
yield; an expected life of six years; expected volatility of 70.09 percent; and
a risk free interest rate of 7.00 percent.  Approximately $32,000 was charged
to compensation cost during 1995 for the options. All such options were
unexercised at December 31, 1996.

Retirement Plan

         In December 1994, the Company established the 401(k) Retirement
Investment Profit-Sharing Plan covering substantially all employees. The
Company did not make matching contributions to the Plan in either 1994, 1995 or
1996.

Partner's Deficit and Other

         Capital account allocations for financial reporting purposes, which
are different than capital account allocations for tax purposes, reflect the
net profits and losses from operations allocated each year as defined in the
Partnership Agreement.

11.  TERMINATION OF AT&T CONTRACT

         The Company and AT&T were parties to a contract (the "AT&T Contract")
under which AT&T provided enhanced call processing, data management services
and long-distance network transport services through a switching complex owned
and operated by AT&T. The AT&T Contract was terminated by AT&T effective June
29, 1996. However, AT&T continues to provide services for certain Company
customers without a formal contract pursuant to AT&T's obligations with respect
to its existing service agreements with such customers.

12. COMMITMENTS AND CONTINGENCIES

Litigation

         On February 16, 1996, the Company filed a lawsuit against AT&T Corp.
("AT&T") in the U.S. District Court, Northern District of Texas, Dallas
Division. The Company is seeking preliminary and permanent injunctive relief
restraining AT&T from using and disclosing the Company's trade secrets and
proprietary information relating to its mobile communications technology. In
July 1996, AT&T filed counterclaims essentially mirroring the Company's claims.

         In September and October 1996, both the Company and AT&T filed
additional claims against each other related to breach of contract and various
tortious activities. AT&T seeks an injunction, a declaratory judgment defining
the parties' intellectual property rights, actual and punitive damages and
attorneys' fees in connection with its counterclaims. The Company seeks a
declaration that the patents issued to AT&T using the Company's proprietary


                                     F-19
<PAGE>   155
information are invalid and should be transferred from AT&T to the Company. The
Company also brought Texas Deceptive Trade Practices Act ("DTPA") claims
against AT&T and seeks actual, punitive and treble damages and attorneys' fees
in connection with its claims. Additionally, the Company's amended complaint
added Lucent Technologies, Inc. ("Lucent") as an additional defendant, to which
AT&T transferred certain of the patents at issue in the lawsuit.

         In November 1996, AT&T filed a Partial Motion to Dismiss the Company's
DTPA claims, various tort claims and the patent invalidity charges.
Additionally, in November 1996, Lucent filed a motion to dismiss all of the
Company's claims against Lucent. In December 1996, the Company filed a response
to AT&T's partial motion to dismiss and a response to Lucent's motion to
dismiss. A hearing on the parties' motions is currently scheduled for May 1997.

         On December 14, 1995 and on February 23, 1996, lawsuits were filed by
certain plaintiffs against the Company and its directors, along with the lead
underwriters for the Company's Offering. The plaintiff in each suit sought
securities class-action certification and purported to represent all similarly
situated shareholders, who bought stock in the Company pursuant to its Offering
in June 1995 or immediately thereafter. The plaintiffs sought unspecified
damages and alleged that the Company's registration statement, prospectus and
other communications in its Offering contained false and materially misleading
statements. The two lawsuits were consolidated into one. On November 4, 1996,
the Court entered a Stipulation and Order of Dismissal which was signed by all
parties, including proposed plaintiffs- in-intervention. This action dismissed
the pending litigation with prejudice, precluding these same plaintiffs from
refiling the same claims in the future. The dismissal of this action did not
involve any payment on the part of the Company or any other defendant.

         The Company is involved in other litigation matters that normally
arise in the course of conducting its business. These matters are not
considered to be of a material nature nor would they have a material effect on
the business activities or continued operations of the Company.

GTE and EDS Contracts

         A subsidiary of GTE, GTE Telecommunications Services, Inc.
("GTE-TSI"), and a subsidiary of Electronic Data Systems, Inc. ("EDS"), perform
certain "clearinghouse" functions for the Company which include, among other
things, validation and verification of roaming numbers and provision and
routing of call delivery information. The Company's agreement with GTE-TSI
expires in March 1998, with certain renewal options by the Company after that
date. The agreement with GTE-TSI may be renewed by the Company for up to ten
additional one-year terms after expiration at a reasonable price to be
determined solely by GTE-TSI. The agreement with EDS expires in August 1998
with successive automatic renewal terms of one-year thereafter, unless
terminated at the option of either party upon 60 days' notice prior to any
expiration date. Another subsidiary of GTE, GTE Wireless, indirectly provides a
significant amount of cellular coverage for the HighwayMaster system and pays
all cellular carriers in the HighwayMaster system for HighwayMaster, billing
the Company on a monthly basis. The term of the current agreement with GTE
Wireless expires in March 1999. The aggregate future minimum payments
associated with these agreements were as follows as of December 31, 1996:

<TABLE>
         <S>                                         <C>
         1997  . . . . . . . . . . . . . . . . . .   $1,080,000
         1998  . . . . . . . . . . . . . . . . . .      680,000
         1999  . . . . . . . . . . . . . . . . . .      120,000
                                                     ----------
                                                     $1,880,000
                                                     ==========
</TABLE>

         Costs related to these contracts are included as cost of service
revenues in the Consolidated Statements of Operations.





                                      F-20
<PAGE>   156
Employment Agreements

         Two officers of the Company entered into employment contracts with
HighwayMaster Corporation effective February 1994 and continuing through the
fifth anniversary of the consummation of the Offering (see Note 3), unless
terminated earlier in the event of death, permanent disability, for "cause" or,
under certain conditions, voluntarily. Under the employment contracts, either
HighwayMaster Corporation or the individuals may terminate employment, without
liability, at any time after February 1996 upon one year's written notice to
the other party. The terms of the contracts provide for an annual base salary
($399,300 at December 31, 1996) for each officer, with annual increases each
year equal to 10%. Each officer shall also receive annual bonuses during the
term of his contract, calculated as defined in the contracts. In addition, the
officers may receive discretionary bonuses at the sole discretion of the board
of directors of HighwayMaster Corporation. During 1994, 1995 and 1996, no
bonuses were earned by the employees. The employment contracts provide for a
severance payment equal to the remaining amount of salary payable under the
contract in the event of termination other than for "cause". The employment
contracts also provide that each of the officers is subject to a covenant not
to compete during the period that compensation is paid under his employment
agreement and for 24 months thereafter.

         A third officer of the Company entered into an employment contract
with HighwayMaster Corporation effective November 1994 and continuing through
the fifth anniversary of the consummation of the Offering, unless terminated
earlier in the event of death, permanent disability, for "cause" or, under
certain conditions, voluntarily. Pursuant to the employment contract, the
officer receives an annual base salary ($302,500 at December 31, 1996), with
annual increases, annual bonuses and discretionary bonuses set on similar terms
as above. During 1994, 1995 and 1996 no such bonuses were earned. In the event
of a termination of employment by the Company with notice or by the officer due
to the Company's breach, the officer will be entitled to the remaining amount
of salary and the minimum bonus that would be payable under the employment
contract absent the termination. In the event of a termination by the officer
with notice (other than as set forth in the preceding sentence), the officer
will be entitled to the salary payable for the remaining term of the contract
or 90 days, whichever is less. Other than in the case of a termination by the
officer due to a breach by the Company, or a termination by the Company with
notice, the contract provides that the officer is subject to a covenant not to
compete for a period of 12 months after the termination of his employment.

Leases

         The Company leases certain office facilities and furniture and
equipment under noncancelable operating leases.  The future minimum lease
payments associated with such leases were as follows as of December 31, 1996:

<TABLE>
         <S>                                              <C>
         1997  . . . . . . . . . . . . . . . . . . . .    $ 1,056,000
         1998  . . . . . . . . . . . . . . . . . . . .        699,000
         1999  . . . . . . . . . . . . . . . . . . . .        141,000
         2000  . . . . . . . . . . . . . . . . . . . .         50,000
         2001  . . . . . . . . . . . . . . . . . . . .          8,000
                                                          -----------
                                                          $ 1,954,000
                                                          ===========
</TABLE>

         During 1994, 1995, and 1996, total rent expense charged to operating
expenses was approximately $613,000, $941,000, and $1,388,000, respectively.

Pickett Racing Contract

         The Company is obligated under a promotional Sports Car Club of
America ("SCCA") racing team sponsorship agreement with Pickett Racing to pay
ten consecutive monthly payments of $65,000 each, which commenced in January
1997.





                                      F-21
<PAGE>   157
Truckstops of America, Inc. Contract

         In June 1994, the Company entered into a three-year operating
agreement with Truckstops of America, Inc. to sell, install, and service Mobile
Communication Units through a national network of truckstop sites. Truckstops
of America, Inc. is required to purchase minimum levels of inventory and parts
for each sales location, and the Company is obligated to repurchase inventory
in the event it becomes unsalable. At December 31, 1996, the amount of
inventory subject to return was approximately $150,000.

Capital Expenditures

         The Company is committed to build another Network Switching Center
(the "additional Complex") in connection with its contract with Prince for the
AutoLink product offering. Construction of the additional Complex is scheduled
for the fourth quarter of 1997 at a cost estimated to range from $2.0 to $3.0
million.

13.  RELATED PARTY TRANSACTIONS

         In connection with the Recapitalization, the Company assumed the
rights and obligations of the Partnership under a certain Agency Agreement,
dated as of February 1, 1993, by and between the Partnership and Saunders,
Lubinski & White, Inc. (the "Agency"). During 1994, 1995, and 1996, the Company
paid $1,231,000, $1,405,000, and $435,000, respectively, under the Agency
Agreement, which includes the pass-through of actual third-party expenses
incurred by the Agency on the Company's behalf. The Agency Agreement provides
that in consideration for its advertising services, the Agency will receive a
5% profit based on the Agency's internal costs on all services provided to the
Company, subject to future negotiation, in addition to actual third-party
media, production and other reasonable expenses. The Agency Agreement may be
terminated, with or without cause, at any time by either party, with 90 days'
notice. An officer of the Company was a principal stockholder and officer of
the Agency until January 1, 1997.

         The Company leases office space from a stockholder for $57,000 per
month plus maintenance and repairs, at an average rate of $14.60 per square
foot per year. Total rent paid under this agreement during 1994, 1995 and 1996
was approximately $194,000, $311,000, and $699,000, respectively.

         Two stockholders of the Company and certain of their affiliates own a
minority interest in Truckstops of America, Inc. (see Note 12). During 1994,
1995 and 1996, the Company recorded revenues of approximately $687,000,
$428,000 and zero, respectively, from sales to Truckstops of America, Inc.

14.  QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

         Unaudited consolidated quarterly results of operations for 1996 and
1995 are as follows (in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                                                  FIRST       SECOND        THIRD     FOURTH
                                                                 QUARTER     QUARTER       QUARTER   QUARTER
                                                                 -------     -------       -------   -------
         1996
         ----
         <S>                                                     <C>         <C>          <C>        <C>
         Total revenues  . . . . . . . . . . . . . . . . . . .   $ 6,291     $  7,581     $  7,524   $ 9,305
         Gross profit (loss)(1)  . . . . . . . . . . . . . . .     1,003        1,052        1,375    (1,260)
         Operating loss  . . . . . . . . . . . . . . . . . . .    (6,136)      (6,484)      (6,718)   (9,293)
         Loss before extraordinary item  . . . . . . . . . . .    (6,368)      (6,899)      (7,463)   (9,013)
         Extraordinary item  . . . . . . . . . . . . . . . . .        --           --         (317)       --
         Net loss  . . . . . . . . . . . . . . . . . . . . . .    (6,368)      (6,899)      (7,780)   (9,013)
         Primary loss per share:(2)
           Before extraordinary item . . . . . . . . . . . . .   $ (0.32)    $  (0.34)    $  (0.37)  $ (0.36)
           Extraordinary item  . . . . . . . . . . . . . . . .        --           --        (0.01)       --
           Net loss  . . . . . . . . . . . . . . . . . . . . .   $ (0.32)    $  (0.34)    $  (0.38)  $ (0.36)
         Weighted average shares outstanding . . . . . . . . .    22,022       22,035       22,178    24,801
</TABLE>





                                      F-22
<PAGE>   158
<TABLE>
<CAPTION>
                                                                   FIRST       SECOND        THIRD     FOURTH
                                                                  QUARTER     QUARTER       QUARTER   QUARTER
                                                                  -------     -------       -------   -------
          1995 
          -----
          <S>                                                     <C>         <C>          <C>        <C>
          Total revenues  . . . . . . . . . . . . . . . . . . .   $ 5,681     $  6,032     $  7,654   $ 7,487
          Gross profit (loss) . . . . . . . . . . . . . . . . .      (238)         226          472      (508)
          Operating loss  . . . . . . . . . . . . . . . . . . .    (5,432)      (4,826)      (5,175)   (6,782)
          Loss before extraordinary item  . . . . . . . . . . .    (7,243)      (6,786)      (5,268)   (7,100)
          Extraordinary item  . . . . . . . . . . . . . . . . .        --       (6,980)          --        --
          Net loss  . . . . . . . . . . . . . . . . . . . . . .    (7,243)     (13,766)      (5,268)   (7,100)
          Primary loss per share:(2)
            Before extraordinary item . . . . . . . . . . . . .   $ (0.41)    $  (0.39)    $  (0.26)  $ (0.34)
            Extraordinary item  . . . . . . . . . . . . . . . .        --     $  (0.37)          --        --
            Net loss  . . . . . . . . . . . . . . . . . . . . .   $ (0.41)    $  (0.76)    $  (0.26)  $ (0.34)
          Weighted average shares outstanding . . . . . . . . .    18,711       18,820       22,022    22,022
</TABLE>
- -----------------


(1)      Fourth quarter includes $1,943,000 inventory writedown related to used
         earlier generation mobile unit component parts.

(2)      Net loss per share is computed independently for each of the quarters
         presented. Therefore, the sum of the quarterly net loss per share
         amounts will not necessarily equal the total for the year.





                                      F-23
<PAGE>   159
               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                          CONSOLIDATED BALANCE SHEETS
                                  (UNAUDITED)
                                 (IN THOUSANDS)

                                     ASSETS

<TABLE>
<CAPTION>
                                                                                     DECEMBER 31,    JUNE 30,
                                                                                         1996          1997
                                                                                         ----          ----
      <S>                                                                              <C>          <C>
      Current assets:
        Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . .      $ 19,725     $   5,987
        Accounts receivable, net  . . . . . . . . . . . . . . . . . . . . . . . .         8,537        11,503
        Other short-term receivables  . . . . . . . . . . . . . . . . . . . . . .           919           838
        Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         3,458         2,764
        Prepaid expenses  . . . . . . . . . . . . . . . . . . . . . . . . . . . .           231           420
                                                                                       --------     ---------
                Total current assets  . . . . . . . . . . . . . . . . . . . . . .        32,870        21,512
      Property, plant and equipment, net  . . . . . . . . . . . . . . . . . . . .         7,756         8,080
      Long-term receivables . . . . . . . . . . . . . . . . . . . . . . . . . . .         1,045           336
      Deposits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           309           308
      Other assets  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           949         2,750
                                                                                       --------     ---------
                Total assets  . . . . . . . . . . . . . . . . . . . . . . . . . .      $ 42,929     $  32,986
                                                                                       ========     =========

                             LIABILITIES AND STOCKHOLDERS' EQUITY

      Current liabilities:
        Accounts payable  . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $  3,450     $   4,345
        Telecommunications costs payable  . . . . . . . . . . . . . . . . . . . .         2,805         4,828
        Accrued warranty  . . . . . . . . . . . . . . . . . . . . . . . . . . . .           273           709
        Accrued loss on short-term contracts  . . . . . . . . . . . . . . . . . .           570           367
        Other current liabilities . . . . . . . . . . . . . . . . . . . . . . . .         1,167         1,888
                                                                                       --------     ---------
                Total current liabilities . . . . . . . . . . . . . . . . . . . .         8,265        12,137
                                                                                       --------     ---------
      Stockholders' equity:
        Preferred stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            --            --
        Common stock  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           251           252
        Additional paid-in capital  . . . . . . . . . . . . . . . . . . . . . . .       144,829       145,030
        Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . . .      (109,869)     (123,886)
        Treasury stock  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          (547)         (547)
                                                                                       --------     ---------
                Total stockholders' equity  . . . . . . . . . . . . . . . . . . .        34,664        20,849
                                                                                       --------     ---------
           Total liabilities and stockholders' equity . . . . . . . . . . . . . .      $ 42,929     $  32,986
                                                                                       ========     =========

</TABLE>


          See accompanying notes to consolidated financial statements.





                                      F-24
<PAGE>   160
               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)
                        (IN THOUSANDS, EXCEPT PER SHARE)

<TABLE>
<CAPTION>
                                                                                                SIX MONTHS ENDED  
                                                                                                     JUNE 30,     
                                                                                                ------------------
                                                                                                1996          1997
                                                                                                ----          ----
    <S>                                                                                      <C>           <C>
    Revenues:
      Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       $   6,423     $  14,249
      Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           7,449        11,006
                                                                                              ---------     ---------
              Total revenues  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          13,872        25,255
                                                                                              ---------     ---------
    Cost of revenues:
      Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           6,403        12,148
      Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           5,415         8,671
                                                                                              ---------     ---------
              Total cost of revenues  . . . . . . . . . . . . . . . . . . . . . . . . .          11,818        20,819
                                                                                              ---------     ---------
    Gross profit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           2,054         4,436
    General and administrative expenses . . . . . . . . . . . . . . . . . . . . . . . .           4,299         7,096
    Sales and marketing expenses  . . . . . . . . . . . . . . . . . . . . . . . . . . .           4,710         4,055
    Engineering expenses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           1,736         2,212
    Customer service expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           3,930         5,538
                                                                                              ---------     ---------
      Operating loss  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         (12,621)      (14,465)
    Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             444           448
    Interest expense to related parties . . . . . . . . . . . . . . . . . . . . . . . .          (1,088)           --
    Other expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              (3)           --
                                                                                              ---------     ---------
      Loss before income taxes and extraordinary item . . . . . . . . . . . . . . . . .         (13,268)      (14,017)
    Income tax provision  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              --            --
                                                                                              ---------     ---------
      Net loss  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       $ (13,268)    $ (14,017)
                                                                                              =========     ========= 
    Per share data:
      Net loss per share  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       $   (0.66)    $   (0.56)
                                                                                              ---------     ---------
      Weighted average number of shares outstanding . . . . . . . . . . . . . . . . . .          22,029        24,843
                                                                                              =========     =========

</TABLE>


          See accompanying notes to consolidated financial statements.





                                      F-25
<PAGE>   161
               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                          SIX MONTHS ENDED JUNE 30,
                                                                                          -------------------------
                                                                                            1996            1997
                                                                                            ----            ----
      <S>                                                                                 <C>             <C>
      CASH FLOWS FROM OPERATING ACTIVITIES:
        Net loss  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $ (13,268)       $(14,017)
        Adjustments to reconcile net loss to cash used in
           operating activities:
           Depreciation and amortization  . . . . . . . . . . . . . . . . . . . .               645           1,172
           Amortization of discount on notes payable  . . . . . . . . . . . . . .               574              --
           (Increase) decrease in accounts receivable . . . . . . . . . . . . . .                28          (2,966)
           (Increase) decrease in other receivables . . . . . . . . . . . . . . .                99             790
           (Increase) decrease in inventory . . . . . . . . . . . . . . . . . . .            (5,379)            694
           (Increase) decrease in prepaid expenses and deposits . . . . . . . . .               158            (188)
           Increase (decrease) in accounts payable  . . . . . . . . . . . . . . .                56             895
           Increase (decrease) in accrued expenses and other
            current liabilities . . . . . . . . . . . . . . . . . . . . . . . . .              (453)          2,977
           Other  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               116             (44)
                                                                                          ---------        --------
                Net cash used in operating activities . . . . . . . . . . . . . .           (17,424)        (10,687)
                                                                                          ---------        --------
      CASH FLOWS FROM INVESTING ACTIVITIES:
        Additions to property and equipment . . . . . . . . . . . . . . . . . . .            (2,099)         (1,191)
        Additions to capitalized software . . . . . . . . . . . . . . . . . . . .               (88)         (2,062)
                                                                                          ---------        --------
                Net cash used in investing activities . . . . . . . . . . . . . .            (2,187)         (3,253)
                                                                                          ---------        --------
      CASH FLOWS FROM FINANCING ACTIVITIES:
        Proceeds from exercise of stock options . . . . . . . . . . . . . . . . .               272             202
                                                                                          ---------        --------
                Net cash provided by financing activities . . . . . . . . . . . .               272             202
                                                                                          ---------        --------
      Net decrease in cash  . . . . . . . . . . . . . . . . . . . . . . . . . . .           (19,339)        (13,738)
      Cash and cash equivalents, beginning of period  . . . . . . . . . . . . . .            23,969          19,725
                                                                                          ---------        --------
      Cash and cash equivalents, end of period  . . . . . . . . . . . . . . . . .         $   4,630        $  5,987
                                                                                          =========        ========
      Supplemental cash flow information:
        Interest paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $     508        $     --
                                                                                          =========        ========
</TABLE>


          See accompanying notes to consolidated financial statements.





                                      F-26
<PAGE>   162
               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

           CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
                         SIX MONTHS ENDED JUNE 30, 1997
                                  (UNAUDITED)
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
                                                                                                                              
                               PREFERRED STOCK      COMMON STOCK      ADDITIONAL   TREASURY STOCK                             
                               ---------------  -------------------    PAID-IN     ---------------   ACCUMULATED              
                               SHARES   AMOUNT  SHARES       AMOUNT    CAPITAL     SHARES   AMOUNT     DEFICIT         TOTAL  
                               ------   ------  ------       ------   ----------   ------   ------   -----------     -------- 
    <S>                        <C>      <C>     <C>          <C>      <C>          <C>      <C>      <C>             <C>
    Stockholders' equity at                                                                                                   
      December 31, 1996 . .     1,000   $   --  25,150,527   $  251   $  144,829  311,997   $ (547)  $  (109,869)    $ 34,664 
      Exercise of stock                                                                                                       
        options . . . . . .                         26,456        1          201                                          202  
      Net loss  . . . . . .                                                                              (14,017)     (14,017) 
                                -----   ------  ----------   ------   ----------  -------   ------   -----------     -------- 
    Stockholders' equity at                                                                                                   
      June 30, 1997 . . . .     1,000   $   --  25,176,983   $  252   $  145,030  311,997   $ (547)  $  (123,886)    $ 20,849 
                                =====   ======  ==========   ======   ==========  =======   ======   ===========     ======== 
</TABLE>

               See accompanying notes to consolidated statements.





                                      F-27
<PAGE>   163
               HIGHWAYMASTER COMMUNICATIONS, INC. AND SUBSIDIARY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)

1.  BUSINESS OVERVIEW

         The Company develops and implements mobile communications solutions,
including integrated voice, data and position location services, to meet the
needs of its customers. The initial application for the Company's wireless
enhanced services has been developed for, and is currently being marketed and
sold to, companies which operate in the long-haul trucking market. The Company
provides long-haul trucking companies with a comprehensive package of mobile
communications and management control services at low, fixed per minute rates,
thereby enabling its trucking customers to effectively monitor the operations
and improve the performance of their fleets. The Company is currently
developing additional applications for its network to expand the range of
trucking companies that utilize its services and to address the need of the
automotive and other markets. Among other things, the Company recently entered
into a strategic business alliance with Prince Corporation, a subsidiary of
Johnson Controls, Inc. and a leading supplier of automotive interior systems
and components, to develop and provide an automobile safety and security
service, the "AutoLink" service, to motorists in the United States and Canada.
The AutoLink service is expected to be available on a commercial basis
beginning in late 1998.

         At the present time, the Company derives all of its revenues from the
long-haul trucking market from sales and installation of Mobile Communication
Units and charges for its services.

2.  BASIS OF PRESENTATION

         The unaudited consolidated financial statements presented herein have
been prepared in accordance with the instructions to Form 10-Q and Article 10
of Regulation S-X. Accordingly, they do not include all footnote disclosures
required by generally accepted accounting principles. These consolidated
financial statements should be read in conjunction with the Company's audited
consolidated financial statements for the year ended December 31, 1996. The
accompanying consolidated financial statements reflect all adjustments (all of
which are of a normal recurring nature) which are, in the opinion of
management, necessary for a fair presentation of the Company's financial
position, results of operations and cash flows for the interim periods. The
results for any interim period are not necessarily indicative of the results
for the entire year.

3.  LEASING OPERATIONS

         The Company leases its products to certain customers with terms
ranging from three to five years. The related contracts are accounted for as
sales-type leases. At December 31, 1996, the total amounts receivable under
sales-type leases was $1,468,000. In March 1997, a customer who represented
$1,239,000 of this amount receivable notified the Company that it intended to
terminate its long-term lease commitment. Although the lease agreement contains
termination penalties, the amount due from this customer is in dispute.
Accordingly, the Company recorded a $1,000,000 charge to reduce the carrying
value of the receivable at March 31, 1997.

4.  INVENTORIES

<TABLE>
<CAPTION>
                                                                                    DECEMBER 31,       JUNE 30,
                                                                                       1996              1997
                                                                                    ----------        ----------
      <S>                                                                           <C>               <C>
      Complete systems  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $1,265,000        $  543,000
      Component parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2,193,000         2,221,000
                                                                                    ----------        ----------
                                                                                    $3,458,000        $2,764,000
                                                                                    ==========        ==========
</TABLE>





                                      F-28
<PAGE>   164
5.  EARNINGS PER SHARE

         Net loss per share for the six months ended June 30, 1997 was computed
by dividing the net loss by the weighted average number of shares outstanding
during the period. Net loss per share for the six months ended June 30, 1996
was computed by dividing the net loss, increased by the accretion of discount
on Series B Preferred Stock ($1,220,000) by the weighted average number of
shares outstanding during the period.

         Stock options are excluded from the calculation of weighted average
shares outstanding for the six months ended June 30, 1996 and 1997 since their
effect would be anti-dilutive.

         In February 1997, the FASB issued FAS No. 128, "Earnings per Share"
("FAS 128"), which is effective for financial statements issued for periods
ending after December 15, 1997, including interim periods. Effective December
31, 1997, the Company will adopt FAS 128, which establishes standards for
computing and presenting earnings per share (EPS). Adoption of FAS 128 would
not have changed the earnings per share amounts reported in the accompanying
consolidated financial statements.

6.  LITIGATION

         As previously reported, the Company is party to a lawsuit filed in the
U.S. District Court, Northern District of Texas, Dallas Division against AT&T
Corp. ("AT&T") and Lucent Technologies, Inc. ("Lucent"). Since the filing of
the Company's Annual Report on Form 10-K for the year ended December 31, 1996,
there have been no material changes in this matter except that with respect to
AT&T's Partial Motion to Dismiss and Lucent's Motion to Dismiss, the court has
requested supplemental briefing in lieu of a hearing on oral arguments.
Briefing dates extend into September and an Order by the Court will follow.





                                      F-29
<PAGE>   165
================================================================================

    NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED
BY THE COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
SOLICITATION OF AN OFFER TO BUY, ANY SECURITY OTHER THAN THE EXCHANGE NOTES
OFFERED HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY ANY OF THE EXCHANGE NOTES TO ANYONE OR BY ANYONE IN ANY
JURISDICTION WHERE, OR TO ANY PERSON TO WHOM, IT WOULD BE UNLAWFUL TO MAKE SUCH
AN OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE
MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE AN IMPLICATION THAT THERE
HAS NOT BEEN A CHANGE IN THE INFORMATION SET FORTH IN THIS PROSPECTUS OR IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.

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

                               TABLE OF CONTENTS

                                  ------------
<TABLE>
<CAPTION>
                                                                         PAGE
                                                                         ----
<S>                                                                   <C>
Prospectus Summary  . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
Risk Factors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
Use of Proceeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
Capitalization  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
Selected Financial Data . . . . . . . . . . . . . . . . . . . . . . . . .  36
Management's Discussion and Analysis Of                               
  Financial Condition and Results of Operations . . . . . . . . . . . . .  38
Business  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
Management  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
Security Ownership  . . . . . . . . . . . . . . . . . . . . . . . . . . .  77
Certain Relationships and Related                                     
  Party Transactions  . . . . . . . . . . . . . . . . . . . . . . . . . .  79
The Exchange Offer  . . . . . . . . . . . . . . . . . . . . . . . . . . .  83
Description of Exchange Notes . . . . . . . . . . . . . . . . . . . . . .  92
Certain U.S. Federal Income Tax                                       
  Considerations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Plan of Distribution  . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Legal Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Experts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Glossary  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Index to Consolidated Financial Statements  . . . . . . . . . . . . . . . F-1
</TABLE>

================================================================================

================================================================================

                                HIGHWAYMASTER
                             COMMUNICATIONS, INC.





                               OFFER TO EXCHANGE
                            ITS 13 3/4% SENIOR NOTES
                              DUE 2005 (SERIES B)
            FOR ANY AND ALL OF ITS OUTSTANDING 13 3/4% SENIOR NOTES
                              DUE 2005 (SERIES A)


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

                                   PROSPECTUS          

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


                               November 4, 1997


================================================================================


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission