CAPROCK COMMUNICATIONS CORP
424B5, 2000-06-16
COMMUNICATIONS SERVICES, NEC
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<PAGE>   1

                                                FILED PURSUANT TO RULE 424(b)(5)
                                                      REGISTRATION NO. 333-32910

PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED APRIL 11, 2000)

                         [CAPROCK COMMUNICATIONS LOGO]

                                4,500,000 SHARES

                          CAPROCK COMMUNICATIONS CORP.

                                  COMMON STOCK
                                $19.50 PER SHARE
                               ------------------

     We are selling 4,500,000 shares of our common stock. The underwriters named
in this prospectus supplement may purchase up to 675,000 additional shares of
common stock from us under certain circumstances.

     Our common stock is quoted on the Nasdaq Stock Market's National Market
under the symbol "CPRK". The last reported sale price of the common stock on the
Nasdaq Stock Market's National Market on June 15, 2000, was $20.50 per share.

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

      INVESTING IN OUR COMMON STOCK INVOLVES RISKS, WHICH ARE DESCRIBED IN THE
"RISK FACTORS" SECTION BEGINNING ON PAGE S-11.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved these securities or determined if this
prospectus supplement or the accompanying prospectus is truthful or complete.
Any representation to the contrary is a criminal offense.

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

<TABLE>
<CAPTION>
                                                              PER SHARE      TOTAL
                                                              ---------   -----------
<S>                                                           <C>         <C>
Public Offering Price                                         $19.5000    $87,750,000
Underwriting Discount                                         $  .8775    $ 3,948,750
Proceeds to CapRock (before expenses)                         $18.6225    $83,801,250
</TABLE>

     The underwriters are offering the shares subject to various conditions. The
underwriters expect to deliver the shares to purchasers on or about June 21,
2000.
                               ------------------

                   Joint Book Runners and Joint Lead Managers

SALOMON SMITH BARNEY                                    BEAR, STEARNS & CO. INC.

June 15, 2000.
<PAGE>   2

                [Insert map of southwest region showing existing
                  and proposed network on inside front cover]
<PAGE>   3

     YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN OR INCORPORATED BY
REFERENCE IN THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING PROSPECTUS. WE HAVE
NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT INFORMATION. WE ARE NOT
MAKING AN OFFER OF THESE SECURITIES IN ANY STATE WHERE THE OFFER IS NOT
PERMITTED. YOU SHOULD NOT ASSUME THAT THE INFORMATION PROVIDED BY THIS
PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING PROSPECTUS IS ACCURATE AS OF ANY DATE
OTHER THAN THE DATE ON THE FRONT OF THIS PROSPECTUS SUPPLEMENT. OUR BUSINESS,
FINANCIAL CONDITION, RESULTS OF OPERATIONS AND PROSPECTS MAY HAVE CHANGED SINCE
THAT DATE.
                               ------------------

                               TABLE OF CONTENTS

                             PROSPECTUS SUPPLEMENT

<TABLE>
<CAPTION>
                                                               PAGE
                                                               ----
<S>                                                            <C>
About This Prospectus Supplement............................    S-2
Forward-Looking Statements..................................    S-3
Prospectus Supplement Summary...............................    S-4
Risk Factors................................................   S-11
Use of Proceeds.............................................   S-24
Dividend Policy.............................................   S-24
Market Price of Common Stock................................   S-24
Capitalization..............................................   S-25
Selected Consolidated Financial Data........................   S-26
Management's Discussion and Analysis of Financial Condition
  and Results of Operations.................................   S-27
Business....................................................   S-38
Regulation and Licenses.....................................   S-55
Management..................................................   S-65
Principal Shareholders......................................   S-68
Description of Outstanding Material Indebtedness............   S-70
Underwriting................................................   S-71
Legal Matters...............................................   S-72
Experts.....................................................   S-72
Where You Can Find More Information.........................   S-73
Index to Consolidated Financial Statements..................    F-1
</TABLE>

                                   PROSPECTUS

<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
About This Prospectus.......................................    1
Where You Can Find More Information.........................    1
The Company.................................................    2
Risk Factors................................................    3
Ratio of Earnings to Fixed Charges and Ratio of Earnings to
  Combined Fixed Charges and Preferred Stock Dividends......    3
Use of Proceeds.............................................    3
Description of Debt Securities..............................    3
Description of Preferred Stock..............................   10
Description of Common Stock.................................   11
Description of Outstanding Material Indebtedness............   11
Description of Outstanding Capital Stock....................   12
Selling Shareholders........................................   13
Plan of Distribution........................................   14
Legal Matters...............................................   16
Experts.....................................................   16
</TABLE>

                                       S-1
<PAGE>   4

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

     Certain persons participating in this offering may engage in transactions
that stabilize, maintain or otherwise affect the price of our common stock,
including over-allotment, stabilizing and short-covering transactions in the
common stock, and the imposition of a penalty bid, during and after the offering
of the common stock. Such stabilization, if commenced, may be discontinued at
any time. For a description of these activities, please refer to the section in
this prospectus supplement entitled "Underwriting."
                               ------------------

     We use market data and industry forecasts throughout this prospectus
supplement, which we have obtained from internal surveys, market research,
publicly available information and industry publications. Industry publications
generally state that the information they provide has been obtained from sources
believed to be reliable, but that the accuracy and completeness of such
information is not guaranteed. Similarly, we believe that the surveys and market
research we or others have performed are reliable, but we have not independently
verified this information. Neither we, nor any of the underwriters, represent
that any such information is accurate.

     We are a Texas corporation. Our principal executive offices are located at
15601 Dallas Parkway, Suite 700, Dallas, Texas 75001, and our telephone number
is (972) 982-9500. We maintain a World Wide Web site at www.caprock.com. The
reference to our World Wide Web address does not constitute incorporation by
reference of the information contained at the site. In this prospectus
supplement, the "Company," "CapRock," "we," "us" and "our" refer to CapRock
Communications Corp. and its subsidiaries, including without limitation CapRock
Telecommunications Corp. ("CapRock Telecommunications"), CapRock Fiber Network,
Ltd. ("CapRock Fiber") and IWL Communications, Incorporated ("IWL
Communications"), which are our three predecessor companies, as well as CapRock
Network Services, L.P., CapRock Telecommunications Leasing Corp. and CapRock
Design Services, L.P., unless the context otherwise requires. In addition,
"Common Stock" refers to our common stock, $.01 par value per share. Unless
otherwise stated, all information contained in this prospectus supplement
assumes no exercise of the underwriters' over-allotment option to purchase up to
675,000 shares of Common Stock from us. CapRock and CapRock Communications are
trademarks of CapRock. All other trade names or trademarks appearing in this
prospectus supplement are the property of their respective holders.
                               ------------------

                        ABOUT THIS PROSPECTUS SUPPLEMENT

     This prospectus supplement contains the terms of this offering. A
description of our capital stock is contained in the accompanying prospectus.
This prospectus supplement, or the information incorporated by reference in this
prospectus supplement, may add, update or change information in the accompanying
prospectus. If information in this prospectus supplement, or the information
incorporated by reference in this prospectus supplement, is inconsistent with
the accompanying prospectus, this prospectus supplement, or the information
incorporated by reference in this prospectus supplement, will apply and will
supersede the information in the accompanying prospectus.

     It is important for you to read and consider all information contained in
this prospectus supplement and the accompanying prospectus in making your
investment decision. You should also read and consider the information in the
documents we have referred you to in "Where You Can Find More Information."

     This prospectus supplement and the accompanying prospectus do not
constitute an offer or solicitation by anyone in any jurisdiction in which an
offer or solicitation is not authorized or in which the person making an offer
or solicitation is not qualified to do so, or to anyone to whom it is unlawful
to make an offer or solicitation.

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

                                       S-2
<PAGE>   5

                           FORWARD-LOOKING STATEMENTS

     This prospectus supplement includes forward-looking statements. We have
based these forward-looking statements on our current expectations and
projections about future events. These forward-looking statements are subject to
risks, uncertainties and assumptions about CapRock including:

     - Our anticipated growth strategies,

     - Anticipated trends in our business, including trends in technology and
       the growth of communications network products and services,

     - Future expenditures for capital projects, and

     - Our ability to continue to control costs and maintain quality.

     These statements may be found in the sections of this prospectus supplement
entitled "Prospectus Supplement Summary," "Risk Factors," "Use of Proceeds,"
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "Business" and in this prospectus supplement generally. Our
actual results could differ materially from those anticipated in these
forward-looking statements as a result of various factors, including all the
risks discussed in "Risk Factors" and elsewhere in this prospectus supplement
and risks related to, among other things, our evolving business model, our
limited operating history, rapid growth, the need for additional capital, debt
and interest payment obligations, restrictions in our senior note indentures,
dependence on and retention of key personnel, successful completion of our
networks, dependence on information systems, interconnection with incumbent
local exchange carriers ("ILECs"), our inability to obtain sufficient
collocations with ILECs, competition, supply and demand for data and
communications services and profitability of such services, the quality and
condition of the infrastructure of the ILECs (including, but not limited to,
last mile connectivity), our ability to profitably market and sell our services
and develop positive cash flow, government regulation and the uncertainty of
deregulation, delays by the ILECs in connecting our customers, reliance on
equipment suppliers and other carriers, regulation of access charges, rapid
technological change, service interruptions, security risks, system failures and
equipment failures, dependence on major carrier customers and joint build
partners, building a fiber network (including obtaining the necessary rights of
way, permits and regulatory approvals), potential liability as an Internet
service provider and protection of our intellectual property.

     We undertake no obligation to publicly update or revise any forward-looking
statements, whether as a result of new information, future events or otherwise.
Because of these risks, uncertainties and assumptions, the forward-looking
events discussed in this prospectus supplement might not occur.

                                       S-3
<PAGE>   6

                         PROSPECTUS SUPPLEMENT SUMMARY

     This summary highlights information contained elsewhere in this prospectus
supplement, the accompanying prospectus and the documents incorporated by
reference. Because it is a summary, it does not contain all of the information
that you should consider before investing. You should read the entire prospectus
supplement, the accompanying prospectus and the documents incorporated by
reference carefully, including the section entitled "Risk Factors" and the
financial statements and related notes to those statements included in this
prospectus supplement, the accompanying prospectus and the documents
incorporated by reference.

                                    CAPROCK

GENERAL

     CapRock is a leading facilities-based integrated communications service
provider to small and medium-sized business and communications carrier customers
in the Southwestern United States. We offer business customers an integrated
bundle of communications products and services including local exchange,
domestic and international long distance, enhanced voice, data, Internet and
dedicated private line services. Additionally, we offer communications-intensive
business and carrier customers dark fiber, high bandwidth dedicated fiber
infrastructure, terminating access for domestic and international long distance
and ATM, frame relay and IP data transport services. We believe that our current
and planned networks will provide our customer base the most comprehensive
service alternative to the incumbent and other competitive communications
service providers in our region.

     Our communications services are provided over our scalable fiber, voice and
data networks which, upon completion, will connect nearly every Tier I, Tier II
and Tier III market in the six-state region of Texas, Louisiana, Arkansas,
Oklahoma, New Mexico and Arizona. At March 31, 2000, our inter-city long-haul
fiber network, consisting primarily of 96 fiber strands, covered approximately
3,700 route miles, which we expect to expand to approximately 6,200 route miles
by year-end 2000. Additionally, at March 31, 2000, we provided switch-based
competitive local exchange services in ten markets, which we expect to expand to
48 markets by year-end 2000. At March 31, 2000, we had 12 voice and 15 data
switches installed and operational on our network.

     We have recently expanded and extended our business plan to allow us to
provide our current and future customers with a broader array of services
delivered over our networks. Specifically, we plan to:

     - Increase our number of central office collocations from 51 at March 31,
       2000 to approximately 200 by year-end 2000,

     - Introduce digital subscriber line ("DSL") services from approximately 100
       collocations by year-end 2000,

     - Construct 22 intra-city metro fiber loops, consisting primarily of 192
       fiber strands, which will add approximately 80 route miles to our fiber
       backbone by year-end 2000, and

     - Expand our total fiber network to approximately 7,500 route miles by
       year-end 2001, including adding 1,250 route miles to our inter-city
       long-haul fiber network routes.

BUSINESS STRATEGY

     We are determined to be the Southwest's dominant competitive provider of
communications services to small and medium-sized businesses. We believe these
customers are under-served by their current providers and are seeking value,
simplicity and outstanding customer service from a single communications
provider. We also believe that our margins and returns on invested capital
quickly increase as we bundle

                                       S-4
<PAGE>   7

our products together and provide them over our fiber, voice and data networks.
The key components of our strategy include the following:

     Provide One-Stop Integrated Communications Services to Small and
Medium-Sized Businesses. We offer small and medium-sized business customers
"one-stop shopping" by giving them the ability to purchase communications
services from a single supplier, including local, long distance, data, Internet,
and soon, DSL services. We believe that bundled services provided on a single
bill enable us to better meet the needs and expectations of our customers,
rapidly penetrate our target markets, capture a larger portion of our customers'
communications expenditures and enhance customer loyalty. We believe that sales
of integrated communications products and services to customers will
increasingly become a major source of our revenues and operating margins.

     Pursue a Super-Regional Focus. We intend to continue targeting customers in
the Southwestern United States where we will provide our services in nearly
every Tier I, II and III market. This region offers us significant opportunities
due to its rapid population growth, rapid job creation and number of access
lines. We believe that our regional focus enables us to better analyze the
market opportunities in this region and develop products and services that
better meet our customers' needs. We believe that we will have the deepest
in-region service coverage of any competitive communications provider, and we
expect to be among the first to offer integrated services in many of our Tier II
and III markets where there is little or no competition to the ILECs. Given that
a substantial portion (estimated to be as high as 70%) of all voice traffic in
the Southwestern United States originates and terminates within the region, we
believe that we will enjoy a significant competitive and financial advantage
over other competitive communications service providers.

     Complete the Southwest Region's Most Extensive Competitive Fiber, Voice and
Data Networks. We are building the Southwest region's most extensive competitive
fiber network, which is comprised primarily of 96 fiber strands pulled through
one of four conduits buried below ground. By year-end 2000, our fiber network
will span approximately 6,200 route miles (including 22 metro fiber loops in key
markets) and will be extremely scalable. A key element of our strategy is to
reduce the cost basis of fiber we retain for our own use by sharing construction
costs with other carriers and to quickly recover our investment by selling
excess dark fiber. We plan to retain at least 24 fiber strands throughout our
entire network. We are also building a competitive local exchange service in 48
markets where we will provide Class 5 switching functionality and DSL services
to our local customers. Our data network will comprise data switches and fiber
capacity that will connect all of these markets in our region, supporting ATM,
frame relay and IP traffic. In many of these local markets we will install
equipment to backhaul our voice and data traffic to one of our switches in order
to significantly lower our capital requirements. We expect our planned fiber,
voice and data networks to be substantially completed in early 2001.

     Focus on Direct Sales to Small and Medium-Sized Business Customers. We use
a direct sales force to sell our communications products and services to
business customers. We believe that our face-to-face sales efforts coupled with
our personalized customer care are highly effective in capturing and retaining
market share among small and medium-sized businesses. We expanded our sales
force to 230 people at March 31, 2000 and will continue to expand our sales
force throughout 2000. We provide our sales force with financial incentives that
promote a high level of ongoing customer care and loyalty. Additionally, at
March 31, 2000, we had 246 independent sales agents who contributed to our sales
efforts throughout the region, primarily in smaller markets.

     Pursue a "Smart Build" Local Strategy, While Maximizing Our Margins by
Emphasizing Facilities-Based Services. We intend to continue to purchase and
install switches, collocate our equipment in the central offices of ILECs and
lease unbundled network elements (or "UNEs") until growth justifies our
investment in additional network assets. We believe that this strategy reduces
our initial capital expenditures and investment risk, as well as the time to
enter and expand within a new market, and generates high returns on invested
capital. At the same time, we believe that we generate significantly higher
operating margins by using our own facilities to provide service rather than by
reselling services

                                       S-5
<PAGE>   8

provided entirely on another carrier's facilities. As a result, we are focusing
our marketing and sales activities in areas where we can serve customers through
a direct connection to our facilities.

     Leverage Our Networks to Serve High-End Residential Customers. We intend to
eventually target high-end, multi-line residential customers located in our
collocation coverage area to enhance our network efficiency and overall
profitability. More and more residential customers are telecommuting and
expanding their personal communications needs, resulting in increased
residential demand for local access lines, Internet services, data services and
DSL lines. We believe we can provide multi-line bundled voice and data services
to these customers at attractive margins in markets where we have already
collocated equipment in the central office of the ILEC and can lease local
access as a UNE. We believe we can effectively target these customers in the
future through telemarketing, direct mail, the web and other sales channels.

     Leverage Our Efficient Back Office Systems. We are automating most of the
processes involved with switching a customer to our network in order to decrease
the time between receipt of a customer order and completion of service
installation. To achieve this goal, we are acquiring, integrating and developing
information technology systems and platforms to support our operations. We have
established and will continue to implement "electronic bonding," which is the
on-line and real-time connections of our operating systems with those of ILECs.
Additionally, we have developed and intend to rollout web-enabled ordering,
billing and customer service features to our customers.

     Capitalize on Proven Management Team. CapRock's veteran management team has
extensive experience and past successes in the communications industry. We
believe the quality, experience and teamwork of our management will enable
CapRock to have the vision, leadership, knowledge and skills necessary to
successfully grow our business and succeed in the competitive communications
industry. Our six senior executives have a combined 78 years of experience in
the telecommunications industry.

RECENT DEVELOPMENTS

     Electronic Bonding. We recently completed testing and began utilizing
electronic bonding with Southwestern Bell Telephone. Electronic bonding with
Southwestern Bell has enabled us to reduce our provisioning times from
approximately 25 business days to as few as five business days. Orders submitted
with electronic bonding are also less likely to be rejected by Southwestern
Bell, resulting in a greater percentage of customers being transitioned to our
facilities in a shorter amount of time. We expect that additional electronic
interfaces with Southwestern Bell will be established in the second quarter of
2000 and with other ILECs by the end of the fourth quarter of 2000.

     Joint Build Projects. In December 1999, we announced a 192 fiber strand,
1,450 mile joint fiber network construction project with AT&T connecting various
cities through Texas, Oklahoma, Arkansas and Louisiana. We are responsible for
constructing most of the network. Upon completion, we and AT&T will each own 96
fibers in a shared conduit, one spare conduit and joint access to one
maintenance conduit. Construction is expected to be completed in the third
quarter of 2000.

     In January 2000, we announced a 192 fiber strand, 1,300 mile joint fiber
network construction project with 360networks Inc., formerly Worldwide Fiber,
connecting various cities through Texas, New Mexico and Arizona. We are each
responsible for constructing various portions of the network. We and 360networks
will each own 96 fibers in a shared conduit, one spare conduit and joint access
to one maintenance conduit. Construction began in the first quarter of 2000 and
is expected to be completed in early 2001.

RECENT MANAGEMENT APPOINTMENTS

     On October 18, 1999, Leo J. Cyr joined CapRock as President and Chief
Operating Officer after a 13-year career at WorldCom. Immediately prior to
joining CapRock, Mr. Cyr was Senior Vice President of WorldCom's Intelligent
Network Architecture and Development Organization. He previously held several
senior management positions in the engineering, wireless, local, network
operations and data

                                       S-6
<PAGE>   9

services departments of WorldCom and was President, Chief Executive Officer and
co-founder of Unisite, Inc.

     On January 26, 2000, T. George Hess, a 31-year telecommunications veteran,
joined CapRock as Senior Vice President of Network Services overseeing
operations, customer service and provisioning. Prior to joining CapRock, Mr.
Hess was Assistant Vice President of Operations and Service Delivery for GTE
Internetworking, a division of GTE providing Internet services to large and
medium-sized corporations. Prior to joining GTE, Mr. Hess was a Senior Vice
President at MFS Communications Company, Inc. and a Vice President at Sprint
Corp.

     On February 2, 2000, Kenneth L. Monblatt, who has ten years of experience
in the telecommunications industry, joined CapRock as Senior Vice President and
Chief Information Officer, after serving in the same position at PageNet.
Previously, Mr. Monblatt established PrimeCo Personal Communication's
Information Technology department and served as its departmental director.

     On February 21, 2000, we announced the promotion of Claude A. Robertson to
Senior Vice President of Carrier Sales. Mr. Robertson joined us in February
1998. Before joining CapRock, Mr. Robertson had been a City Vice President at
MFS WorldCom, Inc. in Denver and a Senior Account Executive at MFS
Communications.

                                       S-7
<PAGE>   10

                                  THE OFFERING

Common Stock offered by
    CapRock................  4,500,000 shares

Common Stock to be
    outstanding after the
    offering(1)............  37,942,541 shares

Use of proceeds............  The net proceeds received by us from this offering
                             (after deducting the underwriting discounts and
                             commissions and estimated offering expenses) will
                             be approximately $83 million. We intend to use
                             these net proceeds to fund the development and
                             growth of our communications networks and business,
                             working capital and general corporate purposes.

Nasdaq Stock Market's
National   Market Symbol...  CPRK
---------------

(1) Based on 33,442,541 shares of Common Stock issued and outstanding as of
    March 31, 2000. If the underwriters exercise the option we granted to them
    in this offering to purchase additional shares of our Common Stock to cover
    over-allotments, then the total number of shares to be outstanding after the
    offering will be 38,617,541 shares. The number of shares outstanding
    excludes unexercised options that we have granted or may grant under our
    employee and director stock option and equity incentive plans and any
    unexercised warrants that we have issued or may issue. As of March 31, 2000,
    4,240,651 options under our employee and director stock option and equity
    incentive plans were outstanding.

                                  RISK FACTORS

     See "Risk Factors" for a discussion of certain factors relating to our
business and an investment in our Common Stock.

                                       S-8
<PAGE>   11

                      SUMMARY CONSOLIDATED FINANCIAL DATA

     The following table sets forth financial data as of and for the years ended
December 31, 1997, 1998 and 1999 and as of and for the three months ended March
31, 1999 and 2000. The business combination among our predecessor companies was
completed on August 26, 1998 and was accounted for as a pooling of interests.
Accordingly, the Consolidated Financial Statements include our three predecessor
companies (CapRock Telecommunications, CapRock Fiber and IWL Communications) as
though these entities were always a part of CapRock.

     In May 1998, IWL Communications changed its fiscal year end to coincide
with the fiscal years of CapRock, CapRock Telecommunications and CapRock Fiber.
This resulted in an adjustment to retained earnings of approximately $260,000 in
the Consolidated Statement of Stockholders' Equity and Comprehensive Income in
1997. IWL Communications' cash flow for this period was added to the 1997
beginning balance in the Consolidated Statement of Cash Flows.

<TABLE>
<CAPTION>
                                                                                    AS OF AND FOR THE THREE
                                        AS OF AND FOR THE YEAR ENDED DECEMBER 31,   MONTHS ENDED MARCH 31,
                                        -----------------------------------------   -----------------------
                                           1997           1998           1999          1999         2000
                                        -----------   ------------   ------------   ----------   ----------
                                                                                          (UNAUDITED)
                                                                  (IN THOUSANDS)
<S>                                     <C>           <C>            <C>            <C>          <C>
STATEMENT OF OPERATIONS DATA:
Revenues..............................   $ 75,349      $ 121,774      $ 192,623      $ 37,036     $ 70,691
Cost of services......................     52,471         83,221        115,676        22,381       42,778
                                         --------      ---------      ---------      --------     --------
          Gross profit................     22,878         38,553         76,947        14,655       27,913
Operating expenses:
  Selling, general and
     administrative...................     14,074         23,528         56,535        12,551       19,095
  Merger related expenses.............         --          2,313             --            --           --
  Depreciation and amortization.......      3,346          4,887          9,698         1,480        4,089
                                         --------      ---------      ---------      --------     --------
          Total operating expenses....     17,420         30,728         66,233        14,031       23,184
                                         --------      ---------      ---------      --------     --------
Operating income......................      5,458          7,825         10,714           624        4,729
Interest expense, net.................     (1,603)        (6,441)       (17,861)       (3,411)      (4,297)
Other income (expense)................        220            106          1,526           (19)         (42)
                                         --------      ---------      ---------      --------     --------
Income (loss) before income taxes.....      4,075          1,490         (5,621)       (2,806)         390
Income tax expense (benefit)..........      1,513          1,267         (2,080)       (1,101)         186
                                         --------      ---------      ---------      --------     --------
          Net income (loss)...........   $  2,562      $     223      $  (3,541)     $ (1,705)    $    204
                                         ========      =========      =========      ========     ========
OPERATING DATA:
EBITDA(a).............................   $  8,804      $  15,025      $  20,412      $  2,104     $  8,818
Cash flows provided by (used in)
  operations..........................      4,112          7,125        (13,302)       (9,690)      (3,392)
Cash flows provided by (used in)
  investing activities................    (12,987)      (134,350)      (264,623)       13,781        2,228
Cash flows provided by financing
  activities..........................     12,114        123,990        283,338            70          602
Capital expenditures..................    (13,631)       (36,855)      (201,289)      (23,819)     (87,039)
BALANCE SHEET DATA:
Cash, cash equivalents and marketable
  securities..........................   $  3,520      $  97,314      $ 188,328      $ 51,488     $110,213
Property, plant and equipment, net....     27,341         59,607        228,601        78,862      299,885
Total assets..........................     49,389        191,966        548,835       193,885      543,078
Long-term debt and capital lease
  obligations.........................     21,062        145,187        347,502       145,308      347,860
Stockholders' equity..................     14,086         16,062         96,030        14,439       97,673
</TABLE>

                                       S-9
<PAGE>   12

<TABLE>
<CAPTION>
                                               AS OF DECEMBER 31,            AS OF MARCH 31,
                                        --------------------------------   -------------------
                                          1997       1998        1999        1999       2000
                                        --------   ---------   ---------   --------   --------
<S>                                     <C>        <C>         <C>         <C>        <C>
OTHER OPERATIONAL DATA (UNAUDITED):
Markets served........................        --           6          10          7         10
Number of voice switches deployed.....         2           6          11          6         12
Number of data switches deployed......        --          --          13         --         15
Central office collocations...........        --          --          31         13         51
Route miles constructed...............       245         800       3,000        800      3,682
Fiber miles constructed, net of
  sales(b)............................    11,760      60,744      92,485     56,172    152,557
Total planned route miles.............       245       4,300       7,500      6,100      7,500
Total planned fiber miles, net of
  sales(b)............................    11,760     396,744     478,741    431,018    473,341
Lines sold............................        --       5,736      61,067     11,403     85,500
Lines installed.......................        --       5,736      40,422      9,085     57,040
Sales force employees.................        32          75         200        118        230
Total employees.......................       196         360         720        428        850
</TABLE>

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

(a)  EBITDA consists of earnings before interest, income taxes, depreciation and
     amortization and merger related expenses. EBITDA is a measure commonly used
     in the communications industry to analyze companies on the basis of
     operating performance. EBITDA is not a measure of financial performance
     under generally accepted accounting principles and should not be considered
     as an alternative to net income as a measure of performance nor as an
     alternative to cash flow as a measure of liquidity.

(b)  Fiber miles are shown net of fiber sold to customers through indefeasible
     right to use agreements (IRUs).

                                      S-10
<PAGE>   13

                                  RISK FACTORS

     You should carefully consider the following risk factors and warnings
before making a decision to invest in our Common Stock. The risks described
below are not the only ones facing our company. Additional risks that we do not
yet know of, or that we currently think are immaterial, may also impair our
business operations. If any of the following risks actually occur, our business,
financial condition or results of operations could be materially adversely
affected. In such case, the trading price of our Common Stock could decline, and
you may lose all or part of your investment. You should also refer to the other
information shown in this prospectus supplement, including our consolidated
financial statements and the related notes.

IT IS DIFFICULT TO PREDICT OUR FUTURE OPERATING RESULTS FROM OUR PREVIOUS
PERFORMANCE SINCE OUR BUSINESS MODEL IS STILL EVOLVING AND WE HAVE A LIMITED
OPERATING HISTORY

     Our limited operating history makes predicting future results difficult.
Because some of our services are new and our business model is still evolving,
we cannot be sure customers will buy our services. In addition, we may realign
our operations into different service areas to support our expanding geographic
markets or make other changes which could increase the cost of providing our
services.

WE MAY BE UNABLE TO MANAGE OUR RAPID GROWTH

     Our company has experienced significant growth in recent years, which has
increased the level of responsibility placed on our management personnel. We
intend to continue growing so that we can pursue existing and potential market
opportunities. This continued growth will place a significant strain on our
management, as well as our financial and other resources. In order to manage our
growth effectively, we must continue to implement and improve our operational
systems, internal procedures, accounts receivable management and financial and
operational controls. If we fail to implement these systems, our business,
financial condition and results of operations will be materially adversely
affected. As we continue to grow, it is important that our management
information systems provide adequate, accurate and timely financial information
so management can make effective and timely business decisions. If our current
management information systems fail, or if we fail to hire and retain qualified
sales, marketing, administrative, operating and technical personnel, our
business operations may be adversely affected. Although we believe we are
properly anticipating our needs, we cannot assure you that we will be able to
properly manage our rapid growth.

WE WILL REQUIRE ADDITIONAL CAPITAL TO EXPAND OUR BUSINESS AND INCREASE REVENUE

     We estimate that our total capital requirements will be approximately $380
million for 2000 and approximately $420 million for 2001. We believe that the
estimated net proceeds from this offering, together with our cash, cash
equivalents and marketable securities, cash flow from operations, and a $100
million credit facility for which we recently obtained a commitment letter will
be sufficient to fund our capital expenditures and working capital requirements
through the end of 2000. However, we cannot assure you that we will be
successful in finalizing the terms of the credit facility. We will require
additional sources of capital to fund our capital expenditure requirements for
2001. We cannot assure you that the additional sources of capital will be
available, that the anticipated sources of working capital will continue to be
available, that we have anticipated all future costs, or that our expected
financial resources will be sufficient to cover future expenditures. Our
revenues and costs are dependent upon several factors that are not within our
control, such as regulatory changes, changes in technology, and increased
competition. If we are unable to obtain additional sources of capital, we may
have to curtail our level of capital expenditures and our rate of expansion,
which may adversely impact our future operating performance.

     In addition, we are likely to need additional capital after the year 2001
to finance further expansion of our fiber, voice and data networks. The actual
amount and timing of future capital requirements may differ from our estimates,
depending on the demand for services, regulatory, technological and competitive

                                      S-11
<PAGE>   14

developments, new market developments and new opportunities. We may also require
additional capital in the future, or sooner than we currently anticipate, for
new business activities related to our current and planned businesses or if we
decide to make acquisitions, enter into joint ventures and strategic alliances
or expand into new geographic regions. Sources of additional capital may include
cash flow from operations, public and private equity, debt financings, bank
financings and vendor financings. If we fail to generate or raise enough
capital, some or all of our current or future expansion plans may be delayed or
abandoned, which could have a material adverse effect on our business, financial
condition, results of operations and cash flow.

OUR SUBSTANTIAL INDEBTEDNESS COULD MAKE US UNABLE TO SERVICE INDEBTEDNESS AND
MEET OUR OTHER REQUIREMENTS AND COULD ADVERSELY AFFECT OUR FINANCIAL HEALTH

     We are highly leveraged and have a significant amount of debt outstanding.
At March 31, 2000, we had approximately $347.9 million of long-term debt, net of
$9.4 million of unamortized debt issuance costs, and $2.7 million in unaccreted
discount, and our debt-to-equity ratio was approximately 3.6 to 1. See
"Capitalization" and "Management's Discussion and Analysis of Financial
Condition and Results of Operations -- Liquidity and Capital Resources." This
degree of leverage may have important consequences to our shareholders, such as
limiting our ability to finance our future operations, to compete effectively
against better capitalized companies, to be flexible in planning for and
reacting to changes in our business, to withstand downturns in our business or
the economy generally, and to pursue business opportunities.

     In addition to our current level of indebtedness, the terms of the
indentures governing our senior notes issued in July 1998 (the "1998 Senior
Notes") and May 1999 (the "1999 Senior Notes") permit us and our subsidiaries to
incur substantial indebtedness in the future, which may include equipment
financings. If we incur additional indebtedness, the risks we now face could
increase.

     Our high level of current indebtedness could have important consequences to
us and you such as:

     - Making it more difficult for us to satisfy our obligations with respect
       to our existing senior notes,

     - Limiting our ability to obtain additional financing to fund our growth
       strategy, working capital, capital expenditures, debt service
       requirements or other purposes,

     - Limiting our ability to use operating cash flow in other areas of our
       business because we must dedicate a substantial portion of these funds to
       make principal payments and fund debt service requirements,

     - Limiting our ability to compete with others who are not as highly
       leveraged as we are,

     - Limiting our ability to react to changing market conditions, changes in
       our industry and economic downturns, and

     - Increasing our vulnerability to general adverse economic and industry
       conditions.

     Our ability to pay interest on our debt and to satisfy our other
obligations will depend upon our future operating performance and our ability to
obtain additional debt or equity financing. Prevailing economic conditions and
financial, business and other factors, many of which are beyond our control,
will affect our ability to make these payments. If in the future we cannot
generate sufficient cash from operations to make scheduled payments on our
senior notes or to meet our other obligations, we will need to refinance our
debt, obtain additional financing or sell assets. We cannot assure you that our
business will generate cash flow, or that we will be able to obtain funding,
sufficient to satisfy our debt service requirements.

LIMITATIONS IMPOSED BY RESTRICTIVE COVENANTS COULD ALTER HOW WE CONDUCT
BUSINESS, AND A DEFAULT UNDER OUR INDENTURES COULD SIGNIFICANTLY IMPACT OUR
ABILITY TO REPAY OUR INDEBTEDNESS

     The indenture for the 1998 Senior Notes and the indenture for the 1999
Senior Notes impose, and we expect that the credit facility for which we have a
commitment letter will impose, significant operating and financial restrictions
on us and our subsidiaries. See "Description of Outstanding Material
Indebtedness."
                                      S-12
<PAGE>   15

These restrictions may significantly limit or prohibit us from engaging in
certain transactions, including the following:

     - Incurring additional indebtedness,

     - Making investments,

     - Issuing or selling capital stock of certain of our subsidiaries,

     - Paying dividends or making other distributions to our shareholders,

     - Limiting the ability of subsidiaries to guaranty indebtedness,

     - Engaging in transactions with affiliates,

     - Creating certain liens on our assets,

     - Entering into sale-leaseback transactions, and

     - Engaging in certain mergers or consolidations.

     These restrictions could limit our ability to obtain future financing, make
needed capital expenditures, withstand a future downturn in our business or in
the economy or otherwise conduct necessary corporate activities.

     Our failure to comply with the restrictions in the indentures and any
senior credit facilities that we have in place from time to time could lead to a
default under the terms of those agreements. We expect that the credit facility
will also require us to maintain specified financial ratios and satisfy certain
financial tests. Our ability to meet these financial ratios and tests may be
affected by events beyond our control and, as a result, we cannot assure you
that we will be able to meet such tests. In the event of a default under any of
our senior credit facilities, the applicable lenders could terminate their
commitments to lend money to us or accelerate the loans and declare all amounts
borrowed due and payable. Borrowings under other debt instruments that contain
cross-acceleration or cross-default provisions may also be accelerated and
become due and payable. If any of these events occurs, we cannot assure you that
we would be able to make the necessary payments to the lenders or be able to
find alternate financing and our failure to do so would have a material adverse
effect on our business, financial condition, results of operations and cash
flow. Even if we could obtain alternate financing, we cannot assure you that it
would be on terms that are favorable or acceptable to us.

OUR SUCCESS DEPENDS ON THE EFFECTIVENESS OF OUR MANAGEMENT; WE HAVE A NEW
PRESIDENT AND CHIEF OPERATING OFFICER AND WE HAVE RECENTLY MADE OTHER CHANGES TO
OUR MANAGEMENT TEAM

     We believe that our success largely depends on the continued involvement
and management of our executive management team and our ability to hire
additional qualified personnel. The competition for qualified managers and
employees in the communications industry is intense. Accordingly, we cannot
assure you that we will be able to retain these key employees or that we will be
able to attract or retain skilled personnel in the future. The loss of the
services of any of these people could have a material adverse effect on our
business, financial condition, results of operations and cash flow.

     We recently hired Leo J. Cyr as our president and chief operating officer,
as well as other new members of our senior management team. See "Management." We
cannot assure you that our new senior officers will be effective in managing our
company or will successfully work with our existing management team.

WE CANNOT ASSURE YOU THAT WE WILL SUCCESSFULLY COMPLETE THE CONSTRUCTION OF OUR
NETWORKS

     Meeting our business objectives, which include offering local, domestic and
international long distance, DSL, Internet and other types of communications
services, will largely depend on our ability to complete and efficiently utilize
our networks. We must also achieve substantial traffic volume over the

                                      S-13
<PAGE>   16

expanded networks in order to fully realize the expected cash flows, operating
efficiencies and cost benefits. The successful completion of our fiber networks
depends upon many factors, some of which are beyond our control, including:

     - Gaining access to sufficient capital,

     - Obtaining access to rights of way,

     - The timely granting of franchise agreements,

     - The availability of construction contractors,

     - Timing conflicts with other fiber projects which could increase
       contractor costs,

     - The pricing and availability of advanced fiber cable,

     - Construction delays,

     - Availability of land or building space at regeneration sites,

     - Cost overruns,

     - Performance of third parties (whether joint build partners or
       contractors), and

     - Other regulatory approvals.

     Although we believe that our cost estimates and build out schedule are
reasonable, we cannot assure you that the actual construction costs or time
required to complete the construction of our fiber network will match our
estimates.

WE ARE DEPENDENT ON EFFECTIVE BILLING, CUSTOMER SERVICE AND INFORMATION SYSTEMS
AND WE MAY HAVE DIFFICULTY INTEGRATING AND DEVELOPING THESE SYSTEMS

     Sophisticated operations support systems, or OSS systems, are vital to all
aspects of our business. Internally developed and externally purchased
information and support systems help to manage our growth and operations
efficiently. As part of our business, we transfer large amounts of electronic
data to and from ILECs and other local telephone companies that compete with the
ILECs. We will be at a competitive disadvantage if we fail to establish
electronic bonding with Southwestern Bell, U S West, GTE, BellSouth and other
ILECs if our competitors successfully establish electronic bonding with those
carriers. Problems in any of the above areas, delays or inaccuracies in billing,
our inability to implement solutions in a timely manner, our inability to manage
the transition from a manual system to an electronic bonding system, or our
failure to establish or upgrade systems as necessary, could have a material
adverse impact on our ability to reach our objectives and on our business,
financial condition, results of operations and cash flow. See "Business -- Sales
and Customer Support."

IF WE DO NOT INTERCONNECT ON FAVORABLE TERMS WITH OUR PRIMARY COMPETITORS, THE
ILECS, OUR BUSINESS WILL BE ADVERSELY AFFECTED

     In addition to providing local service utilizing total service resale
provided by the ILECs, we intend to significantly expand our use of unbundled
network elements. Unbundled network elements constitute the components of the
services customers purchase from ILECs. We expect the resale of unbundled
network elements and services of ILECs to play an important part in our local
service business strategy. Although the ILECs are required under the
Telecommunications Act of 1996 (the "1996 Telecommunications Act") to unbundle
and make available elements of their network and permit us to purchase only the
origination and termination services that we need, thereby decreasing our
operating expenses, such unbundling may not be done as quickly as we require,
will depend upon our ability to collocate our equipment with the ILECs and may
be priced higher than we expect. This is important because we rely on the
facilities of these other carriers to connect to our high capacity digital
switches so that we can provide services to our customers. Our ability to obtain
interconnection, collocation and resale agreements

                                      S-14
<PAGE>   17

on favorable terms, and the time and expense involved in negotiating them, can
be adversely affected by legal developments, among other things.

     Although the 1996 Telecommunications Act requires the ILECs to allow such
resale, we cannot guarantee either:

          (1) that the 1996 Telecommunications Act, certain provisions of which
     ILECs have challenged in federal court, will be implemented on a timely
     basis and on favorable terms, including specifically that the rules
     governing which elements ILECs must provide and the cost methodology for
     providing these elements, which are currently under Federal Communications
     Commission ("FCC") and judicial review, will be upheld,

          (2) that we can successfully negotiate with ILECs the necessary
     collocation, interconnection and resale agreements, particularly those
     agreements that govern the purchase of the unbundled network elements, or

          (3) that the ILECs will timely and accurately process our orders for
     customers switching to our services and for the maintenance of unbundled
     network elements to assure uninterrupted service.

     A Supreme Court decision vacated a FCC rule determining which network
elements the ILECs must provide to competitors on an unbundled basis. On
November 5, 1999, the FCC released an order revising its unbundled network
element rules to conform to the Supreme Court's interpretation of the law, and
reaffirmed the availability of the basic network elements, such as loops and
dedicated transport. This order is subject to further agency reconsideration
and/or court review. Any substantial limitation on our ability to secure
reasonable and timely access to ILEC services and unbundled network elements, to
obtain agreements on as favorable terms as our competitors, or difficulties
obtaining ILEC cooperation in migrating our local service customers from ILEC
facilities to our facilities could have a material adverse effect on our
business, financial condition, results of operations and cash flow. See
"Regulation and Licenses."

OUR PRINCIPAL COMPETITORS FOR LOCAL SERVICES, THE ILECS, AND POTENTIAL
ADDITIONAL COMPETITORS HAVE ADVANTAGES THAT MAY ADVERSELY AFFECT OUR ABILITY TO
COMPETE WITH THEM

     The communications services industry is highly competitive, rapidly
evolving and subject to constant technological change. In particular, numerous
companies offer long distance, local, DSL, Internet, data and bandwidth
services, and we expect competition to increase in the future. We believe that
existing competitors will likely continue to expand their service offerings to
appeal to our existing or potential customers. Many of our existing competitors,
including the ILECs, have greater financial, personnel, brand and name
recognition and other resources. Moreover, we expect that new competitors will
enter the communications market, and that some of these new competitors may
offer similar services to those offered by us. In particular, we believe that
the ILECs in our region may have already begun or may soon begin to offer long
distance services, including SBC Communications, Inc. ("SBC") which has filed an
application with the FCC to provide long distance services in Texas. The United
States Department of Justice recently recommended approval of that application.
However, the FCC still must approve the application before SBC can offer long
distance services in Texas. In addition, the regulatory environment in which we
operate is undergoing significant change. As this regulatory environment
evolves, changes may occur that could create greater or unique competitive
advantages for our current or potential competitors, or could make it easier for
other new entrants to provide services. Other providers currently offer one or
more of each of the services we offer, and many communications companies operate
generally in the same long distance, local, DSL, Internet, data and bandwidth
service submarkets as we do. As a service provider in the long distance
communications industry, we compete with several well established providers, as
well as many other long distance providers with less significant market share.
We cannot assure you that we will be able to compete effectively with other
providers in our region. See "Business -- Competition."

                                      S-15
<PAGE>   18

OUR FUTURE SUCCESS WILL DEPEND ON GROWTH IN THE DEMAND FOR INTERNET ACCESS AND
HIGH-SPEED DATA SERVICES, INCLUDING DSL

     If the markets for the services we offer, including Internet access and
high-speed data services, fail to develop, grow more slowly than anticipated or
become saturated with competitors, we may not be able to achieve our projected
revenues. The markets for business Internet and high-speed data services,
including DSL, are in the early stages of development. Demand for Internet
services is highly uncertain and depends on a number of factors, including the
growth in consumer and business use of new interactive technologies, the
development of technologies that facilitate interactive communication between
organizations and targeted audiences, security concerns and increases in data
transport capacity.

     In addition, the market for high-speed data transmission via DSL technology
is relatively new and evolving. Various providers of high-speed digital services
are testing products from several suppliers for various applications, and no
industry standard has been broadly adopted. Critical issues concerning
commercial use of DSL for Internet and high-speed data access, including
security, reliability, ease of use and cost and quality of service, remain
unresolved and may impact the growth of these services.

     If the market for our Internet access and DSL services fails to develop,
grows more slowly than anticipated or becomes saturated with competitors, these
events could materially adversely affect our business, financial condition and
results of operations. We cannot accurately predict the rate at which this
market will grow, if at all, or whether new or increased competition will result
in market saturation.

THE QUALITY AND CONDITION OF AVAILABLE COPPER TELEPHONE LINES MAY IMPAIR OUR
ABILITY TO PROVIDE DSL SERVICES

     We significantly depend on the quality and maintenance of the copper
telephone lines we obtain from ILECs to provide DSL services. We may not be able
to obtain the copper telephone lines and the services we require on a timely
basis or at quality levels, prices, terms and conditions satisfactory to us.
ILECs may not maintain the lines in a manner satisfactory to us. In the event
that the prices, quality or condition of an ILEC's lines or services are not
acceptable, we may incur expenses which we cannot recover or suffer damage to
our reputation.

OUR DSL SERVICES MAY INTERFERE WITH OR BE AFFECTED BY OTHER TRANSPORT
TECHNOLOGIES

     All transport technologies using copper telephone lines have the potential
to interfere with, or to be interfered with by, other traffic on adjacent copper
telephone lines. Such interference could degrade the performance of our services
and make us unable to provide service on selected lines. Interference, or claims
of interference, if widespread, would adversely affect our speed of deployment,
reputation, brand image, service quality and customer loyalty and satisfaction.
In addition, ILECs may claim that the potential for interference by DSL
technology permits them to restrict or delay our deployment of DSL services. The
telecommunications industry and regulatory agencies are still developing
procedures to resolve interference issues between competitive local exchange
carriers ("CLECs") and ILECs, and these procedures may not be effective. We may
be unable to successfully negotiate interference resolution procedures with
ILECs. Failure to do so could have a material adverse effect on our business,
financial condition, results of operations and cash flow.

OUR SERVICES MAY NOT ACHIEVE SUFFICIENT MARKET ACCEPTANCE TO BECOME PROFITABLE

     To be successful, we must develop and market services that are widely
accepted by businesses at profitable prices. Our success will depend upon the
willingness of our target customers to accept us as an alternative provider of
local, long distance, high-speed data and Internet services. Although we are in
the process of rolling out high-speed data and Internet services and developing
additional products and services, we might not be able to provide the range of
communication services our target business customers need or desire. In
addition, the lack of willingness by e-commerce providers to accept us as a
marketing, sales and distribution partner would have a negative impact on our
ability to deliver additional products and services to our target customers.
                                      S-16
<PAGE>   19

OUR FAILURE TO ACHIEVE OR SUSTAIN MARKET ACCEPTANCE AT DESIRED PRICING LEVELS
COULD IMPAIR OUR ABILITY TO ACHIEVE PROFITABILITY OR POSITIVE CASH FLOW

     Prices for data communication services have fallen historically, a trend we
expect will continue. We expect that prices for fiber, bandwidth, data, local,
long distance and Internet services will decline over the next several years due
primarily to the following:

     - Price competition as various network providers continue to install
       networks that might compete with our networks,

     - Technological advances that permit substantial increases in the
       transmission capacity of both new and existing fiber, and

     - Strategic alliances or similar transactions, such as long distance
       capacity purchasing alliances among regional Bell operating companies
       ("RBOCs"), that increase the parties' purchasing power.

     Accordingly, we cannot predict to what extent we may need to reduce our
prices to remain competitive or whether we will be able to sustain future
pricing levels as our competitors introduce competing services or similar
services at lower prices. Our ability to meet price competition may depend on
our ability to operate at costs equal to or lower than our competitors or
potential competitors. There is a risk that competitors, perceiving us to lack
capital resources, may undercut our rates or increase their services or take
other actions in an effort to force us out of business. Our failure to achieve
or sustain market acceptance at desired pricing levels could impair our ability
to achieve profitability or positive cash flow. In addition, we cannot assure
you that we will be able to achieve increased traffic volumes at acceptable
prices and volumes to support our expanded network. Our business, financial
condition, results of operations and cash flow could be adversely affected if we
are unable to successfully market the capacity of our network or adequately
utilize our network capacity for internal traffic.

OUR NEED TO COMPLY WITH EXTENSIVE GOVERNMENTAL REGULATION CAN INCREASE OUR COSTS
AND SLOW OUR GROWTH

     Significant regulations imposed at the international, federal, state and
local levels govern the provision of telecommunications services and affect our
business and our existing and potential competitors. Delays in receiving
required regulatory approvals, the enactment of new and adverse legislation,
regulations or regulatory requirements or the application of existing laws and
regulations to certain services may have a material adverse effect on our
business, financial condition, results of operations and cash flow. In addition,
future legislative, judicial and regulatory agency actions could alter
competitive conditions in the markets in which we intend to operate, in ways not
necessarily to our advantage. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations," "Business -- Competition" and
"Regulation and Licenses."

DEREGULATION OF THE TELECOMMUNICATIONS INDUSTRY INVOLVES UNCERTAINTIES, AND THE
RESOLUTION OF THESE UNCERTAINTIES COULD ADVERSELY AFFECT OUR BUSINESS

     The 1996 Telecommunications Act provides for a significant deregulation of
the domestic telecommunications industry, including the local exchange, long
distance and cable television industries. Certain pertinent provisions of the
1996 Telecommunications Act remain subject to judicial review and additional FCC
rulemaking, and thus it is difficult to predict what effect the legislation will
have on us and our operations. There are currently many regulatory and court
actions underway and being contemplated by federal and state authorities
regarding interconnection pricing and other issues that could result in
significant changes to the business conditions in the telecommunications
industry. We cannot assure you that these changes will not have a material
adverse effect upon us. See "Regulation and Licenses."

                                      S-17
<PAGE>   20

DELAYS BY THE ILECS IN CONNECTING OUR CUSTOMERS TO OUR NETWORK COULD RESULT IN
CUSTOMER DISSATISFACTION AND LOSS OF BUSINESS

     We rely on the timeliness of ILECs and CLECs in processing our orders for
customers switching to our service and in maintaining the customer's standard
telephone lines to assure uninterrupted service. Delays by the ILECs in
processing orders for customers switching to our service and in connecting our
customers to our network could result in customer dissatisfaction and loss of
business. The ILECs have had little experience leasing standard telephone lines
to other companies. Therefore, the ILECs might not be able to continue to
provide and maintain leased standard telephone lines in a prompt and efficient
manner as the number of standard telephone lines requested by competitive
carriers increases. Their inability to do so could have a material adverse
effect on our business, financial condition, results of operations and cash
flow.

OUR RELIANCE ON A LIMITED NUMBER OF EQUIPMENT SUPPLIERS COULD RESULT IN
ADDITIONAL EXPENSES OR DELAYS IN OUR EXPANSION

     We currently rely and expect to continue to rely on a limited number of
third-party suppliers to manufacture the equipment we require to provide our
services, including our DSL services. If our suppliers enter into competition
with us, or if our competitors enter into exclusive or restrictive arrangements
with our suppliers, it may materially and adversely affect the availability and
pricing of the equipment we purchase. Our reliance on third-party vendors
involves a number of additional risks, including the absence of guaranteed
supply and reduced control over delivery schedules, quality assurance,
production yields and costs.

     We cannot assure you that our vendors will be able to meet our needs in a
satisfactory and timely manner in the future or that we will be able to obtain
alternative vendors when and if needed. It could take a significant period of
time to establish relationships with alternative suppliers for critical
technologies and to introduce substitute technologies into our network. As a
result, the use of alternative vendors could delay our expansion plans. In
addition, if we change vendors, we may need to replace all or a portion of the
equipment, including the DSL equipment, deployed within our network at
significant expense in terms of equipment costs and loss of revenues in the
interim.

DEPENDENCE ON OTHER CARRIERS AND THE REGULATION OF ACCESS CHARGES INVOLVES
UNCERTAINTIES, AND THE RESOLUTION OF THESE UNCERTAINTIES COULD ADVERSELY AFFECT
OUR BUSINESS

     Our ability to provide long distance services to certain domestic and
international locations, especially those not on our network, depends on
agreements with many other carriers. The transmission rates under some of these
agreements are lower than the rates we would be charged for terminating traffic
directly with the ILEC at tariffed rates. If we lost access to the services we
receive under these contracts, if the carriers providing these services raise
their rates or if the services we receive suffer a reduction in quality, it
could have a material adverse effect on our business, financial condition,
results of operations and cash flow.

     We are dependent on our agreements with the ILECs operating in our existing
and targeted markets. These interconnection agreements specify how we connect
our networks with the networks of the ILEC in each of our markets. Federal
telecommunications legislation and FCC rules require ILECs to provide access to
their networks through interconnection agreements and to offer unbundled
elements of their networks and retail services at prescribed rates to other
telecommunications carriers. Failure to negotiate necessary interconnection
agreements or renew existing interconnection agreements on favorable terms could
have a material adverse effect on our business. The pace at which we are able to
add new customers and services could be adversely affected if the ILECs do not
provide us with necessary network elements, collocation space, intercompany
network connections and the means to share information about customer accounts,
service orders and repairs on a timely basis. Disputes concerning the types of
equipment we may collocate could also cause delays and added expense. In
addition, our ability to provide certain high-speed data services will be
dependent on our obtaining space from the various ILECs for physical collocation
of

                                      S-18
<PAGE>   21

our equipment in the ILECs' central offices and elsewhere. In many instances the
ILECs do not timely or fully comply with these requirements. Also, the rules
governing which elements the ILECs must provide and the cost methodology for
providing these elements are currently under FCC and judicial review.

     Interconnection agreements are subject to review and approval by various
federal and state regulators. Parties to interconnection agreements may also
seek modification of the interconnection agreements based on the outcome of
regulatory or judicial rulings occurring after the date of such agreements. The
outcome of these rulings, or any modified interconnection agreements could have
a material adverse effect on us.

     To the extent we provide long distance telecommunications services, we are
required to pay access charges to other local exchange carriers ("LECs") when we
use the facilities of those companies to originate or terminate long distance
calls. As a CLEC, we also provide access services to other long distance service
providers. The interstate access charges of ILECs are subject to extensive
regulation by the FCC, while those of CLECs are subject to a lesser degree of
FCC regulation, but remain subject to the requirement that all charges be just,
reasonable, and not unreasonably discriminatory.

     On May 31, 2000, the FCC adopted an order intended to significantly reduce
access charges paid by long distance companies.

     Disputes have arisen regarding the regulation of access charges and these
may be resolved adversely to us. Some long distance carriers, including AT&T and
Sprint, have challenged the switched access rates of CLECs and have withheld
some or all payments for the switched access services that they continue to
receive. Those long distance carriers have challenged CLEC switched access
charges arguing that they are higher than those of the ILEC serving the same
territory and are therefore unjust and unreasonable. In a specific complaint
case brought by a long distance carrier, the FCC recently confirmed the
obligation of a long distance carrier to pay a CLEC's tariffed rates for
originating access that it received. In contrast, several states have proposed
or required that CLEC access charges be limited to those charged by ILECs
operating in the same area as the CLEC with respect to calls originating or
terminating in such area, except where the CLEC in question can establish that
its costs justify a higher access rate through a formal cost proceeding. The FCC
and state commissions are currently considering the switched access rate level
issue. Our switched access rates will have to be adjusted to comport with future
decisions of the FCC and state commissions and these adjustments could have a
material adverse effect on our business, financial condition, results of
operations and cash flow.

WE MAY BE UNABLE TO ADAPT TO TECHNOLOGICAL CHANGE

     The telecommunications industry is subject to rapid and significant changes
in technology, and we rely on outside vendors for the development of and access
to new technology. We cannot predict the effect of technological changes on our
business. We believe our future success will depend, in part, on our ability to
anticipate and adapt to such changes and to offer, on a timely basis, services
that meet customer demands. We cannot assure you that we will obtain access to
new technology on a timely basis or on satisfactory terms. Any failure by us to
obtain new technology could cause us to lose customers and market share, which
could have a material adverse effect on our business, financial condition,
results of operations and cash flow.

IF OUR EQUIPMENT DOES NOT PERFORM AS WE EXPECT, IT COULD DELAY OUR EXPANSION
INTO NEW MARKETS AND OUR INTRODUCTION OF NEW SERVICES

     In implementing our strategy, we may use new or existing technologies to
offer additional services. We also plan to use equipment manufactured by
multiple vendors to offer our current and future services in each of our
markets. If we cannot successfully install and integrate the technology and
equipment necessary to deliver our current services and any future services
within the time frame and with the cost effectiveness we currently contemplate,
we could be forced to delay or abandon a portion of our expansion plans or the
introduction of new services. This could also affect our ability to attract and
retain customers, which could have a material adverse effect on our business,
financial condition, results of operations and cash flow.
                                      S-19
<PAGE>   22

WE ARE SUBJECT TO THE RISK OF SYSTEM FAILURE AND SECURITY RISKS

     Our equipment, facilities and service operations can be adversely affected
by any of the following factors: fiber cuts, fire, equipment failures, inclement
weather, hurricanes, tornadoes, thunderstorms, power loss, service outages,
failures or loss of satellites, human error, unauthorized intrusion, natural
disasters, acts of sabotage and other similar events.

     We currently have switches in Dallas, Houston, San Antonio, McAllen, Austin
and Victoria, Texas, Lafayette, Louisiana, Phoenix, Arizona and Oklahoma City,
Oklahoma, as well as a managed switch in Jersey City, New Jersey. A substantial
portion of our long distance voice traffic currently passes through one of our
Dallas switches, and thus we rely heavily upon the operation of this Dallas
switch. Any event that negatively impacts the Dallas switches could have a
material adverse effect on our business, financial condition, results of
operation and cash flow.

     We cannot guarantee that fire, equipment failure or other events will not
disable our equipment. Loss or impairment of some or all of our key facilities
could have a material adverse effect on our business, financial condition,
results of operations and cash flow. Our networks and switching facilities
experience periodic service interruptions and equipment failures, and the
operation of our networks remain subject to international, national and regional
telecommunications outages, political instability or regulatory issues from time
to time. As a result, we may, from time to time, experience service
interruptions or equipment failures that could have a material adverse effect on
our business, financial condition, results of operations and cash flow.

     Our network may be vulnerable to unauthorized access, computer viruses and
other disruptive problems. Internet service provider, telecommunications carrier
and corporate networks have in the past experienced, and may in the future
experience, interruptions in service as a result of accidental or intentional
actions of Internet users, current and former employees and others. Unauthorized
access could also potentially jeopardize the security of confidential
information stored in the computer systems of our customers. This might result
in liability to our customers and also might deter potential customers. We
intend to implement security measures that are standard within the
telecommunications industry, as well as newly developed security measures. We
have not done so yet and may not implement such measures in a timely manner. If
and when implemented, such measures may be circumvented. Eliminating computer
viruses and alleviating other security problems may require interruptions,
delays or cessation of service to our customers, which could harm our business,
financial condition, results of operations and cash flow.

WE DEPEND ON OUR MAJOR CARRIER CUSTOMERS AND JOINT BUILD PARTNERS

     Our carrier customers generally use more than one communications service
provider. They can quickly switch from our services to other providers without
incurring significant expense. In addition, our customer agreements generally
provide that in the event of prolonged loss of service or for other good
reasons, customers may terminate our service without penalty. As a result, we
cannot assure you that we will be able to retain our customers. The loss or
significant decrease of business from any of our largest customers would, and a
corresponding reduction in the demand for our services could, have a material
adverse effect on our business, financial condition, results of operations and
cash flow. We also depend on our joint build partners. The joint build fiber
arrangements provide several benefits, including reduction of construction
costs, hiring and supervision of contractors, accelerated acquisitions of rights
of way, franchises and permits, completion of construction on schedule and the
freeing up of resources to focus attention on the construction of other portions
of our network.

WE NEED RIGHTS OF WAY, FRANCHISES AND PERMITS TO BUILD OUR FIBER NETWORK

     We need certain rights of way, franchises and permits from railroads,
utilities, state highway authorities, local governments and transit authorities
to install underground conduits for our fiber network. We cannot assure you that
we will be able to obtain, on a timely basis or at all, and keep all the
additional rights of way, franchises and permits we need to successfully
implement our business plan. If we lose or

                                      S-20
<PAGE>   23

fail to maintain certain critical rights of way, franchises or permits necessary
for the fiber network, there may be a material adverse effect on our business,
financial condition, results of operations and cash flow.

FUTURE SALES OF OUR COMMON STOCK MAY ADVERSELY AFFECT OUR COMMON STOCK PRICE

     We believe that substantially all of the shares of Common Stock that will
be outstanding after this offering and shares of Common Stock issuable upon the
exercise of outstanding options will be freely tradeable under federal
securities laws following this offering, subject to some limitations. These
limitations include vesting provisions in option and restricted stock
agreements, restrictions in lock-up agreements with certain shareholders and
volume and manner-of-sale restrictions under Rule 144. The future sale of a
substantial number of shares of Common Stock in the public market following this
offering, or the perception that such sales could occur, could adversely affect
the prevailing market price of our Common Stock.

OUR FORWARD-LOOKING STATEMENTS MAY MATERIALLY DIFFER FROM ACTUAL EVENTS OR
RESULTS

     This prospectus supplement contains "forward-looking statements," within
the meaning of Section 27A of the Securities Act of 1933, as amended (the
"Securities Act"), and we intend that such forward-looking statements be subject
to the safe harbors created by this law. You generally can identify these
statements by our use of forward-looking words such as "believes," "expects,"
"may," "will," "should" or "anticipates" or the negative or other variations of
such terms or comparable terminology, or by discussion of strategy that involve
risks and uncertainties. We often use these types of statements when discussing
our plans and strategies, our anticipation of revenues from designated markets,
and statements regarding the development of our businesses, the markets for our
services and products, our anticipated capital expenditures, operations support
systems or changes in regulatory requirements and other statements contained in
this prospectus supplement regarding matters that are not historical facts. We
caution you that these forward-looking statements are only predictions and
estimates regarding future events and circumstances. We cannot assure you that
we will achieve the future results reflected in these statements.

WE MAY INCUR LIABILITY AS AN INTERNET SERVICE PROVIDER

     We are an Internet service provider, or an ISP. The law governing the
liability of on-line service providers and Internet access providers for
participating in the hosting or transmission of objectionable materials or
information currently remains unsettled. Under the 1996 Telecommunications Act,
courts can impose civil and criminal penalties for the use of interactive
computer services for the transmission of certain indecent or obscene
communications. The United States Supreme Court in 1997 held this provision
unconstitutional as it relates to indecent, but not obscene, communications.
Also, some states have adopted or may adopt in the future similar requirements.
The constitutionality of such state requirements remains unsettled at this time.
Laws have also been adopted relating to Internet user privacy. In the United
States, the Children's Online Privacy Protection Act applies to the online
collection of personal information from children under the age of 13. The
Federal Trade Commission has issued rules under that Act, and may impose
penalties for non-compliance with the Act and the rules. In addition, several
private parties have filed lawsuits seeking to hold ISPs accountable for
information that they transmit, such as libelous material and copyrighted
material. We cannot predict the outcome of this litigation or the potential for
the imposition of liability on ISPs for information that they host, distribute
or transport. These suits and other laws and regulations could materially change
the way ISPs must conduct business and could impact our determination to expand
or continue this business. To the extent that we become parties to future
litigation, such litigation could have a material adverse effect on our
business, financial condition, results of operations and cash flow.

OTHER COMPANIES HAVE NAMES SIMILAR TO OURS

     Even though we have registered the mark "CapRock Communications" in the
United States, other companies in many different industries, particularly in
West Texas (where the name is commonly used),
                                      S-21
<PAGE>   24

have preexisting rights to the name "Caprock" within defined territories. One
specific company may have the right to use the name for telecommunications
services within an established area. If any of these other companies is
successful with its claims to our name, we may be required to either obtain a
license from them for the use of the name "CapRock," or be required to change
our name within certain defined territories. Either result would cause us to
incur additional expenses. If we are required to change our name, we may lose
the goodwill associated with the CapRock name.

OUR COMMON STOCK PRICE CONSTANTLY CHANGES

     A public market for our Common Stock has existed since August 27, 1998 on
the Nasdaq Stock Market's National Market, under the ticker symbol "CPRK." The
price for our stock on that trading market constantly changes. We expect that
the market price of our Common Stock will continue to change. The fluctuation in
our stock price is caused by a number of factors, some of which are beyond our
control, including:

     - Quarterly variations in operating results,

     - Changes in financial estimates by securities analysts,

     - Changes in market valuations of information technology service and
       telecommunications companies,

     - Announcements by us of significant contracts, acquisitions, strategic
       partnerships, joint ventures, or capital commitments,

     - The loss or acquisition of major customers,

     - Additions or departures of key personnel, and

     - Sales of Common Stock.

     In addition, the stock market in recent years has experienced broad price
and volume fluctuations that have often been unrelated to the operating
performance of companies, particularly telecommunications and technology
companies. These broad market fluctuations also have, and may continue to,
adversely affect the market price of our Common Stock.

OUR OFFICERS AND DIRECTORS WILL OWN ENOUGH SHARES TO CONTROL CAPROCK AFTER THE
OFFERING

     After this offering, our officers and directors together will beneficially
own approximately 37.5% of the outstanding shares of our Common Stock. As a
result, they will be able to exercise control over matters requiring shareholder
approval, including the election of directors, the approval of mergers,
consolidations and sales of all or substantially all of our assets. This may
prevent or discourage tender offers for our Common Stock.

COMMUNICATIONS LAWS AND STATE CORPORATE LAWS MAY MAKE IT HARDER FOR SOMEONE TO
ACQUIRE CONTROL OF CAPROCK

     In most instances, before we transfer control or assign any of our
intrastate certification authorities, international authority or FCC licenses
and authorizations we need regulatory approval by the FCC and various state
regulatory agencies. Certain communications laws also impose limits on foreign
ownership of certain domestic carriers. In addition, our Articles of
Incorporation provide that Article 13.03 of the Texas Business Corporation Act,
which limits statutory takeovers, does not apply to us. Any of these factors
could have the effect of delaying, deferring or preventing a change in control
of CapRock. See "Regulation and Licenses."

                                      S-22
<PAGE>   25

IF WE BECOME SUBJECT TO THE INVESTMENT COMPANY ACT, IT COULD ADVERSELY AFFECT
OUR FINANCING ACTIVITIES AND FINANCIAL RESULTS

     We currently have substantial short-term investments, pending the
deployment of our capital in the pursuit of building our business and these will
increase if we complete this offering. This may result in CapRock being treated
as an "investment company" under the Investment Company Act of 1940 (the
"Investment Company Act"). This statute requires the registration of, and
imposes various substantive restrictions on, certain companies that are, or hold
themselves out as being, engaged primarily, or propose to engage primarily in,
the business of investing, reinvesting or trading in securities, or that fail
certain statistical tests regarding composition of assets and sources of income
and are not primarily engaged in businesses other than investing, reinvesting,
owning, holding or trading securities. We believe that we are primarily engaged
in a business other than investing, reinvesting, owning, holding or trading
securities and, therefore, are not an investment company within the meaning of
this statute. If we were required to register as an investment company under the
Investment Company Act, we would become subject to substantial regulation with
respect to our capital structure, management, operations, transactions with
affiliated persons and other matters. To avoid having to register as an
investment company, we may have to invest a portion of our liquid assets in cash
and demand deposits instead of securities. Having to register as an investment
company or having to invest a material portion of our liquid assets in cash and
demand deposits to avoid such registration could have a material adverse effect
on our business, financial condition, results of operations and cash flow.

WE MAY NOT PAY DIVIDENDS

     We do not expect to pay any cash dividends on our Common Stock in the
foreseeable future. We intend to retain any earnings for use in our business.
The indenture for the 1998 Senior Notes and the indenture for the 1999 Senior
Notes effectively prohibit us from paying cash dividends for the foreseeable
future.

                                      S-23
<PAGE>   26

                                USE OF PROCEEDS

     The net proceeds to CapRock from the sale of 4,500,000 shares of Common
Stock in this offering at the offering price of $19.50 per share are estimated
to be approximately $83 million (approximately $95.8 million if the
underwriters' over-allotment option is exercised in full), after deducting
underwriting discounts and commissions and estimated offering expenses payable
by CapRock. We intend to use the net proceeds from this offering to fund the
development and growth of our communications networks and business, working
capital and general corporate purposes. Until we use the net proceeds in this
manner, we may temporarily use them to make short-term investments. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."

                                DIVIDEND POLICY

     We do not anticipate paying any cash dividends on our Common Stock in the
foreseeable future. Any future determination to pay dividends will be at the
discretion of our Board of Directors and will be dependent upon then existing
conditions. In addition, the indentures for our 1998 Senior Notes and our 1999
Senior Notes effectively prohibit us from paying cash dividends for the
foreseeable future.

                          MARKET PRICE OF COMMON STOCK

     Our Common Stock has traded on the Nasdaq Stock Market's National Market
under the symbol "CPRK" since August 27, 1998, the day after the business
combination of our predecessor companies was completed. The following table sets
forth, for the periods indicated, the range of high and low sales prices for our
Common Stock as reported on the Nasdaq Stock Market's National Market.

<TABLE>
<CAPTION>
                                                              PRICE RANGE OF
                                                               COMMON STOCK
                                                              ---------------
                                                               HIGH     LOW
                                                              ------   ------
<S>                                                           <C>      <C>
1998:
  Third Quarter (beginning on August 27, 1998)..............  $10.00   $ 6.38
  Fourth Quarter............................................    8.75     4.75
1999:
  First Quarter.............................................   20.13     7.25
  Second Quarter............................................   41.63    18.25
  Third Quarter.............................................   40.25    22.38
  Fourth Quarter............................................   34.38    17.25
2000:
  First Quarter.............................................   58.50    29.75
  Second Quarter (through June 15, 2000)....................   49.00    19.00
</TABLE>

     On June 15, 2000, the last reported closing sales price of the Common Stock
was $20.50 per share. As of March 31, 2000, there were approximately 125
shareholders of record of our Common Stock.

                                      S-24
<PAGE>   27

                                 CAPITALIZATION

     The following table sets forth our capitalization as of March 31, 2000 (1)
on an actual basis, and (2) on an as adjusted basis to give effect to our sale
and issuance of 4,500,000 shares of Common Stock offered hereby at an offering
price of $19.50 per share, after deducting the combined underwriting discounts
and commissions and estimated offering expenses and fees totaling approximately
$4.5 million. The table shown below should be read in conjunction with our
Consolidated Financial Statements including the accompanying notes included
elsewhere in this prospectus supplement.

<TABLE>
<CAPTION>
                                                                  MARCH 31, 2000
                                                              ----------------------
                                                               ACTUAL    AS ADJUSTED
                                                              --------   -----------
                                                                   (UNAUDITED)
                                                                  (IN THOUSANDS)
<S>                                                           <C>        <C>
Cash, cash equivalents and marketable securities............  $110,213    $193,414
                                                              ========    ========
Long-term debt:
  11 1/2% Senior notes, due 2009............................  $202,018    $202,018
  12% Senior notes, due 2008................................   145,842     145,842
                                                              --------    --------
          Total long-term debt, net of discount and
            unamortized debt issuance cost..................   347,860     347,860
                                                              --------    --------
Stockholders' equity:
  Common stock, $.01 par value; 200,000,000 shares
     authorized; 33,442,541 shares issued and outstanding,
     actual, and 37,942,541 shares issued and outstanding,
     as adjusted(a).........................................       335         380
  Additional paid-in capital................................    95,965     179,121
  Retained earnings.........................................     2,271       2,271
  Accumulated other comprehensive loss......................       (11)        (11)
  Unearned compensation.....................................      (209)       (209)
  Treasury stock, at cost...................................      (678)       (678)
                                                              --------    --------
          Total stockholders' equity........................    97,673     180,874
                                                              --------    --------
          Total capitalization..............................  $445,533    $528,734
                                                              ========    ========
</TABLE>

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

(a)  Excludes (1) 4,240,651 shares of Common Stock issuable upon exercise of
     options outstanding on March 31, 2000, with a weighted average exercise
     price of $16.86 per share, and (2) 1,386,680 shares available for future
     issuance under our employee and director stock option and equity incentive
     plans as of March 31, 2000.

                                      S-25
<PAGE>   28

                      SELECTED CONSOLIDATED FINANCIAL DATA

    The following table sets forth financial data as of and for the years ended
December 31, 1995, 1996, 1997, 1998 and 1999 and as of and for the three months
ended March 31, 1999 and 2000. The business combination among our predecessor
companies was completed on August 26, 1998 and was accounted for as a pooling of
interests. Accordingly, the Consolidated Financial Statements include our three
predecessor companies (CapRock Telecommunications, CapRock Fiber and IWL
Communications) as though these entities were always a part of CapRock.

    In May 1998, IWL Communications changed its fiscal year end to coincide with
the fiscal years of CapRock, CapRock Telecommunications and CapRock Fiber. The
Consolidated Statement of Operations for the year ended December 31, 1996
combines the operating activity of IWL Communications for the year ended June
30, 1996 with the operating activity of CapRock Telecommunications and CapRock
Fiber for the year ended December 31, 1996. The net income of IWL Communications
in the amount of approximately $260,000 for the six month period ended December
31, 1996 was excluded from the Consolidated Statement of Operations for the year
ended December 31, 1996 as a result of the non-conforming year ends for such
period. This amount was included as an adjustment to retained earnings in the
Consolidated Statement of Stockholders' Equity and Comprehensive Income in 1997.
IWL Communications' cash flow for this period was added to the 1997 beginning
balance in the Consolidated Statement of Cash Flows.

<TABLE>
<CAPTION>
                                                                                                               AS OF AND FOR THE
                                                                                                                 THREE MONTHS
                                                            AS OF AND FOR THE YEAR ENDED DECEMBER 31,           ENDED MARCH 31,
                                                      -----------------------------------------------------   -------------------
                                                       1995       1996       1997       1998        1999        1999       2000
                                                      -------   --------   --------   ---------   ---------   --------   --------
                                                                                                                  (UNAUDITED)
                                                                         (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                   <C>       <C>        <C>        <C>         <C>         <C>        <C>
STATEMENT OF OPERATIONS DATA:
Revenues............................................  $29,407   $ 50,970   $ 75,349   $ 121,774   $ 192,623   $ 37,036   $ 70,691
Cost of services....................................   21,185     39,357     52,471      83,221     115,676     22,381     42,778
                                                      -------   --------   --------   ---------   ---------   --------   --------
        Gross profit................................    8,222     11,613     22,878      38,553      76,947     14,655     27,913
Operating expenses:
  Selling, general and administrative...............    7,326      8,983     14,074      23,528      56,535     12,551     19,095
  Merger related expenses...........................       --         --         --       2,313          --         --         --
  Depreciation and amortization.....................    1,186      1,536      3,346       4,887       9,698      1,480      4,089
                                                      -------   --------   --------   ---------   ---------   --------   --------
        Total operating expenses....................    8,512     10,519     17,420      30,728      66,233     14,031     23,184
                                                      -------   --------   --------   ---------   ---------   --------   --------
Operating income (loss).............................     (290)     1,094      5,458       7,825      10,714        624      4,729
Interest expense, net...............................     (484)      (585)    (1,603)     (6,441)    (17,861)    (3,411)    (4,297)
Other income (expense)..............................      151         42        220         106       1,526        (19)       (42)
                                                      -------   --------   --------   ---------   ---------   --------   --------
Income (loss) before income taxes and extraordinary
  item..............................................     (623)       551      4,075       1,490      (5,621)    (2,806)       390
Income tax expense (benefit)........................       48        227      1,513       1,267      (2,080)    (1,101)       186
                                                      -------   --------   --------   ---------   ---------   --------   --------
Income (loss) before extraordinary item.............     (671)       324      2,562         223      (3,541)    (1,705)       204
Extraordinary item -- extinguishment of debt........      645         --         --          --          --         --         --
                                                      -------   --------   --------   ---------   ---------   --------   --------
        Net income (loss)...........................  $   (26)  $    324   $  2,562   $     223   $  (3,541)  $ (1,705)  $    204
                                                      =======   ========   ========   =========   =========   ========   ========
Pro forma net income (loss):
  Income (loss) before income taxes and
    extraordinary item..............................  $  (623)  $    551   $  4,075   $   1,490   $  (5,621)  $ (2,806)  $    390
  Pro forma income tax expense (benefit), as if
    CapRock Fiber were a C corporation..............     (211)       143      1,475       1,267      (2,080)    (1,101)       186
                                                      -------   --------   --------   ---------   ---------   --------   --------
  Income (loss) before extraordinary item...........     (412)       408      2,600         223      (3,541)    (1,705)       204
  Extraordinary item, net of taxes..................      397         --         --          --          --         --         --
                                                      -------   --------   --------   ---------   ---------   --------   --------
        Pro forma net income (loss).................  $   (15)  $    408   $  2,600   $     223   $  (3,541)  $ (1,705)  $    204
                                                      =======   ========   ========   =========   =========   ========   ========
Historical and pro forma income (loss) per common
  share:
  Income (loss) before extraordinary item...........  $ (0.02)  $   0.01   $   0.09   $    0.01   $   (0.11)  $  (0.06)  $   0.01
  Extraordinary item, net of taxes..................     0.02         --         --          --          --         --         --
                                                      -------   --------   --------   ---------   ---------   --------   --------
  Basic and diluted.................................  $    --   $   0.01   $   0.09   $    0.01   $   (0.11)  $  (0.06)  $   0.01
                                                      =======   ========   ========   =========   =========   ========   ========
Weighted average shares outstanding:
  Basic.............................................   25,926     27,146     27,984      28,899      31,727     28,943     33,336
  Diluted...........................................   25,936     27,156     28,481      30,028      31,727     28,943     36,006
OPERATING DATA:
EBITDA(a)...........................................  $   896   $  2,630   $  8,804   $  15,025   $  20,412   $  2,104   $  8,818
Cash flows provided by (used in) operations.........      827        781      4,112       7,125     (13,302)    (9,690)    (3,392)
Cash flows provided by (used in) investing
  activities........................................   (1,919)    (9,350)   (12,987)   (134,350)   (264,623)    13,781      2,228
Cash flows provided by financing activities.........      903      8,605     12,114     123,990     283,338         70        602
Capital expenditures................................   (2,282)   (10,212)   (13,631)    (36,855)   (201,289)   (23,819)   (87,039)
BALANCE SHEET DATA:
Cash, cash equivalents and marketable securities....  $ 1,452   $    386   $  3,520   $  97,314   $ 188,328   $ 51,488   $110,213
Property, plant and equipment, net..................    6,705     15,901     27,341      59,607     228,601     78,862    299,885
Total assets........................................   13,198     28,522     49,389     191,966     548,835    193,885    543,078
Long-term debt and capital lease obligations........    2,443     13,254     21,062     145,187     347,502    145,308    347,860
Stockholders' equity................................    3,552      3,886     14,086      16,062      96,030     14,439     97,673
</TABLE>

---------------
(a)  EBITDA consists of earnings before interest, income taxes, depreciation and
     amortization and merger related expenses. EBITDA is a measure commonly used
     in the communications industry to analyze companies on the basis of
     operating performance. EBITDA is not a measure of financial performance
     under generally accepted accounting principles and should not be considered
     as an alternative to net income as a measure of performance nor as an
     alternative to cash flow as a measure of liquidity.

                                      S-26
<PAGE>   29

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

     The following discussion and analysis should be read in conjunction with
our consolidated financial statements and notes thereto contained elsewhere in
this prospectus supplement. This information is not necessarily indicative of
future operating results. Except for the historical information contained below,
the matters discussed in this section are forward-looking statements that
involve a number of risks and uncertainties, including those described in "Risk
Factors." Our actual liquidity needs, capital resources and operating results
may differ materially from the discussion shown below in these forward-looking
statements.

OVERVIEW

     We are a leading facilities-based integrated communications service
provider to small and medium-sized business and communications carrier customers
in the Southwestern United States. We offer business customers an integrated
bundle of communications products and services including local exchange,
domestic and international long distance, enhanced voice, data, Internet and
dedicated private line services. Additionally, we offer our
communications-intensive business and carrier customers dark fiber, high
bandwidth dedicated fiber infrastructure, terminating access for domestic and
international long distance and ATM, frame relay and IP data transport services.
We believe that our current and planned networks will provide our customer base
the most comprehensive service alternative to the incumbent and other
competitive communications service providers in our region.

     Our communications services are provided over our scalable fiber, voice and
data networks which, upon completion, will connect nearly every Tier I, Tier II
and Tier III market in the six-state region of Texas, Louisiana, Arkansas,
Oklahoma, New Mexico and Arizona. At March 31, 2000, our inter-city long-haul
fiber network covered approximately 3,700 route miles, which we expect to expand
to approximately 6,200 route miles by year-end 2000.

     Building and expanding our network and infrastructure has required and will
continue to require us to incur significant capital expenditures, primarily
consisting of the costs to build our fiber network, deploy our voice and data
switches and increase the number of our central office collocations. As of March
31, 2000, we had 51 central office collocations and intend to expand that number
to 200 collocations by the end of 2000. We plan to equip approximately 100 of
these collocations so that we can provide DSL services on a wholesale and retail
basis. These collocations enable us to provide local exchange and other services
on our own network infrastructure, which significantly lowers our cost of
providing these services. Additionally, we had 15 data switches as of March 31,
2000, which we expect to expand to 17 data switches by the end of 2000.

     We have strategically entered into several joint build fiber arrangements,
which will significantly reduce the construction costs of our networks. To date,
we have entered into joint build fiber arrangements with Enron Broadband
Services, Inc. (formerly Enron Communications, Inc.), AT&T, 360networks Inc. and
Pathnet. The joint build fiber arrangements provide several benefits, including
reduction of construction costs, accelerated acquisition of rights of way, and
the freeing up of resources to focus attention on the construction of other
portions of our network. To further reduce the cost of building our network, we
intend to sell excess dark fiber and retain at least 24 fiber strands for our
own use.

RESULTS OF OPERATIONS

     In August 1998, we announced that we had completed a business combination
transaction in which our predecessor companies combined to form our company as
it exists today. The combination was accounted for as a pooling of interests.
Accordingly, our consolidated results include our three predecessor companies
(CapRock Telecommunications, CapRock Fiber and IWL Communications) as though
these entities have always been a part of CapRock.

                                      S-27
<PAGE>   30

     To measure our progress, we classify our revenue into three categories:
carriers' carrier, integrated services and systems services.

     Carriers' Carrier. Carriers' carrier revenue includes all carrier revenues
generated from the sale of domestic and international long distance, from the
sale of T-1 and DS-3 broadband capacity and from the sale and lease of dark
fiber. The revenue generated from the international long distance represents
minutes of traffic generated by U.S.-based long distance carriers terminating in
foreign countries. These revenues are recognized when the services are provided.
The cost of these services is based primarily on the direct costs associated
with owned and leased transmission capacity and the cost of transmitting and
terminating traffic on other carriers' facilities. Commissions paid to sales
representatives or independent sales agents to acquire customer call traffic are
expensed in the period when associated call revenues are recognized.

     Dark fiber sales are generally referred to as IRUs (indefeasible right to
use). These sales are non-recurring. Revenues are recognized immediately on IRUs
sold from available fiber on completed network segments and on the percentage of
completion basis on IRUs sold from network segments under construction. Payment
is generally received at the time of sale, or shortly thereafter, for IRUs sold
on completed network segments. Payment is generally received over contractual
milestones for IRUs sold from network segments under construction. In both
scenarios, payments are received within one year from the time of sale. Revenue
attributed to IRUs was $9.5 million in 1998, $76.1 million in 1999 and $37.7
million for the three months ended March 31, 2000. Revenue attributed to IRUs
beyond 2001 is anticipated to decline as we deplete our dark fiber available for
sale. We expect revenues from our new service offerings to offset this decline
in our IRU revenues.

     Recent accounting pronouncements have affected the recognition of revenue
associated with IRUs entered into after June 30, 1999. See "-- New Accounting
Pronouncements." Accordingly, revenue from the sale of IRUs that convey title to
the purchaser will be recognized as a sale either on a percentage-of-completion
basis or in its entirety if the fiber build has been completed. Revenue from IRU
sales that do not convey title to the purchaser will be recognized over the life
of the IRU. All of our IRU sales since July 1, 1999 have conveyed title to the
purchaser and, accordingly, revenue from such sales has been recognized on a
percentage-of completion basis or in its entirety.

     Revenues generated from dark fiber and capacity leases are generally
recognized in monthly installments over the lease term, which is generally a
lease term of less than ten years.

     Integrated Services. Integrated services revenue includes all revenues
generated from the sale of communications services primarily to small and
medium-sized business customers. These services include local exchange, domestic
and international long distance, enhanced voice, data, Internet and dedicated
private line services, and soon, DSL services. We record revenues and the
related cost of services at the time of customer usage.

     Our local services include revenues from local switched and enhanced
services, such as caller ID and call waiting. We began offering local exchange
services to our customers in 1998. We have been successful in selling our
integrated services to customers and have sold 85,500 local access lines as of
March 31, 2000, of which 57,040 were installed lines. The remaining 28,460 local
access lines were in various stages of customer provisioning at March 31, 2000.
We are currently introducing initiatives to reduce the provisioning cycle time
and our backlog of lines. These initiatives include, among other things,
electronic bonding with the ILEC, which allows our systems to communicate with
those of the ILEC on an automated basis.

     Our long distance revenue consists of both switched access and dedicated
access. Switched access services include "one plus long distance," whereby a
customer has selected CapRock as their long distance provider, toll free
800/888/877 service and calling cards. These services are offered for both
domestic and international calling. Dedicated access service is generally for
larger users with sufficient traffic volume to warrant the use of dedicated
private lines that directly connect the end user to our switch.

     Revenues from integrated services are the foundation for our future growth
and will expand as we increase our customer base and our product offerings to
small and medium-sized business customers. Our
                                      S-28
<PAGE>   31

primary competitors are the ILECs. The table below provides key operational data
relating to our integrated services offering:

<TABLE>
<CAPTION>
                                                       DECEMBER 31,       MARCH 31,
                                                      --------------   ---------------
                                                      1998     1999     1999     2000
                                                      -----   ------   ------   ------
<S>                                                   <C>     <C>      <C>      <C>
Markets served......................................      6       10        7       10
Business customers served...........................  3,950   13,309    5,055   16,808
Sales force employees...............................     75      200      118      230
Voice switches......................................      6       11        6       12
ATM and frame switches..............................     --       13       --       15
Collocations completed..............................     --       31       13       51
Lines sold..........................................  5,736   61,067   11,403   85,500
Lines installed.....................................  5,736   40,422    9,085   57,040
</TABLE>

     Due to our expanding switching platform and collocations, we anticipate
that in 2000 we will have additional revenue sources from access charges and
from the offering of new services, such as DSL. Access charges represent fees
for connecting CapRock local service customers to their selected long distance
carriers (originating access) and for delivering inbound long distance to
CapRock customers (terminating access). Additionally, we believe that we will be
able to offer dedicated access to our customers for voice and data services on
our network through dedicated private lines and virtual private networks. These
services and charges will be recognized as revenue as the services are provided.

     Systems Services. Systems services revenue includes revenues generated from
the design, installation, leasing and sale of voice and data systems and
products typically to offshore oil and gas industry customers in the Gulf of
Mexico. Satellite and microwave transmission media are used depending on the
type and location of the drilling rig involved. We also install telephone and
switchboard equipment to offshore customers. These revenues are recognized as
the services are provided. We will continue to provide these services to our
customer base, however, as our other revenue sources continue to grow, this
component of our business will become a smaller percent of revenues.

     The following table represents the various sources of revenues:

<TABLE>
<CAPTION>
                                                                       THREE MONTHS ENDED
                                          YEAR ENDED DECEMBER 31,           MARCH 31,
                                       -----------------------------   -------------------
                                        1997       1998       1999       1999       2000
                                       -------   --------   --------   --------   --------
                                                                           (UNAUDITED)
                                                         (IN THOUSANDS)
<S>                                    <C>       <C>        <C>        <C>        <C>
Revenues:
  Carriers' carrier..................  $41,805   $ 80,628   $141,175   $24,452    $55,111
  Integrated services................    8,640      9,516     21,870     4,504      9,680
  Systems services...................   24,904     31,630     29,578     8,080      5,900
                                       -------   --------   --------   -------    -------
          Total revenues.............  $75,349   $121,774   $192,623   $37,036    $70,691
                                       =======   ========   ========   =======    =======
Gross margin percent.................       30%        32%        40%       40%        40%
                                       =======   ========   ========   =======    =======
</TABLE>

                                      S-29
<PAGE>   32

     The following table sets forth, for the periods indicated, our statement of
operations as a percentage of our operating revenues:

<TABLE>
<CAPTION>
                                                                             THREE MONTHS
                                                      FOR THE YEAR ENDED        ENDED
                                                         DECEMBER 31,         MARCH 31,
                                                     --------------------    ------------
                                                     1997    1998    1999    1999    2000
                                                     ----    ----    ----    ----    ----
                                                                             (UNAUDITED)
<S>                                                  <C>     <C>     <C>     <C>     <C>
Revenues...........................................  100%    100%    100%    100%    100%
Cost of services...................................   70      68      60      60      60
                                                     ---     ---     ---     ---     ---
          Gross profit.............................   30      32      40      40      40
Operating expenses:
  Selling, general and administrative..............   19      19      29      34      28
  Merger related expenses..........................   --       2      --      --      --
  Depreciation and amortization....................    4       4       5       4       6
                                                     ---     ---     ---     ---     ---
          Total operating expenses.................   23      25      34      38      34
                                                     ---     ---     ---     ---     ---
Operating income...................................    7       7       6       2       6
Interest expense...................................   (2)     (8)    (14)    (12)     (9)
Interest income....................................   --       2       4       2       3
Other income.......................................   --      --       1      --      --
                                                     ---     ---     ---     ---     ---
          Income (loss) before income taxes........    5       1      (3)     (8)     --
Income tax expense (benefit).......................    2       1      (1)     (3)     --
                                                     ---     ---     ---     ---     ---
          Net income (loss)........................    3%     --%     (2)%    (5)%    --%
                                                     ===     ===     ===     ===     ===
</TABLE>

THREE MONTHS ENDED MARCH 31, 1999 COMPARED TO THREE MONTHS ENDED MARCH 31, 2000

     Revenues. Total revenues increased $33.7 million, or 91%, from $37.0
million during the three months ended March 31, 1999 to $70.7 million during the
three months ended March 31, 2000. This increase was attributable to increases
of 125% in carriers' carrier, 116% in integrated services and offset by a
decrease of 27% in systems services revenue.

     Carriers' carrier revenue increased $30.6 million from $24.5 million during
the three months ended March 31, 1999 to $55.1 million during the three months
ended March 31, 2000. The 125% increase resulted primarily from the sale of IRUs
and dark fiber leases. Minutes of use associated with our carrier business
increased from approximately 217.8 million minutes during the three months ended
March 31, 1999 to 263.3 million during the three months ended March 31, 2000.
The average revenue per carrier minute was approximately $0.08 per minute during
the three months ended March 31, 1999 and $0.06 per minute during the three
months ended March 31, 2000. The decrease in the revenue per minute is
attributable to a decrease in domestic and international rates. We anticipate
that long distance competitive pressures will continue to drive down prices, but
the price decline will be partially offset by increased volumes. Fiber related
revenues, attributed to IRUs, increased $26.6 million from $11.1 million during
the three months ended March 31, 1999 to $37.7 million during the three months
ended March 31, 2000. We anticipate revenue relating to IRUs to continue at
comparable levels through 2000 and decline in subsequent years. However,
period-to-period fluctuations can be expected as this type of revenue is
affected by the negotiation and terms of these contracts and the build out of
our network. We derived approximately $5.6 million and $9.7 million or 15% and
14% of our revenue from traffic terminated to international countries during the
three months ended March 31, 1999 and 2000, respectively. Revenue per minute for
a majority of the international countries, particularly Mexico, continues to
decrease as a result of deregulation in the countries and increased competition.

     Integrated services revenue increased $5.2 million from $4.5 million during
the three months ended March 31, 1999 to $9.7 million during the three months
ended March 31, 2000. The 116% increase was attributable to growth in the number
of business customers both from increased penetration in our existing markets
and from the deployment of our network into new markets. Access lines sold
increased from

                                      S-30
<PAGE>   33

11,403 at March 31, 1999 to 85,500 at the end of March 31, 2000. Installed
access lines increased from 9,085 at March 31, 1999 to 57,040 at March 31, 2000.
Our direct sales force increased from 118 at March 31, 1999 to 230 at March 31,
2000. We now have sales offices in Dallas, Fort Worth, Houston, San Antonio,
Austin, Corpus Christi and Victoria, Texas, Lafayette and New Orleans, Louisiana
and Phoenix, Arizona. We anticipate increased revenue from integrated services
as our networks are further deployed in new markets and as our sales force for
this revenue segment continues to grow.

     Systems services revenue decreased $2.2 million from $8.1 million during
the three months ended March 31, 1999 to $5.9 million during the three months
ended March 31, 2000. The 27% decrease was attributable to a reduction in the
leasing and sale of voice and data systems and fewer projects involving the
engineering and integration of telecommunications systems and sales, service and
maintenance of telecommunications equipment. We anticipate systems services
revenue in 2000 will remain at comparable levels.

     Cost of Services. Cost of services increased $20.4 million, or 91%, from
$22.4 million during the three months ended March 31, 1999 to $42.8 million
during the three months ended March 31, 2000. The increase in cost of services
was primarily attributable to the continued growth in revenue. Gross margins
were 40% for the three month periods ended March 31, 1999 and 2000. Gross
margins on minutes of use associated with our carrier customers have decreased
from the three months ended March 31, 1999 to the three months ended March 31,
2000 as a result of competitive pressures. This decrease was offset by a higher
volume of IRU sales during the three months ended March 31, 2000 compared to the
three months ended March 31, 1999, which carry a higher gross margin.

     Selling, General and Administrative Expenses. Selling, general and
administrative expenses ("SG&A") include salaries, benefits, occupancy costs,
commissions, sales and marketing expenses and administrative expenses. SG&A
increased $6.5 million, or 52%, from $12.6 million during the three months ended
March 31, 1999 to $19.1 million during the three months ended March 31, 2000.
The increase resulted primarily from the additional personnel required to
support our growth, advertising to increase name recognition and brand awareness
and additional sales commission payments.

     Depreciation and Amortization Expense. Depreciation and amortization
expense increased $2.6 million, or 173%, from $1.5 million during the three
months ended March 31, 1999 to $4.1 million during the three months ended March
31, 2000. This increase resulted primarily from additional fiber segments placed
in service and purchases of additional equipment and other fixed assets to
accommodate our growth. We expect that depreciation and amortization expense
will continue to increase in subsequent periods as we continue to expand our
facilities and place additional fiber segments in service.

     Interest Expense. Interest expense increased $2.2 million from $4.3 million
during the three months ended March 31, 1999 to $6.5 million during the three
months ended March 31, 2000. The increase resulted from interest expense related
to our 1999 Senior Notes. See "-- Liquidity and Capital Resources."

     Interest Income. Interest income increased $1.4 million from $845,000
during the three months ended March 31, 1999 to $2.2 million during the three
months ended March 31, 2000. The increase was attributable to the interest and
investment accretion with the marketable securities purchased with the proceeds
from our 1999 Senior Notes.

     Income Tax Expense (Benefit). During the three months ended March 31, 1999,
we incurred income tax benefit of $1.1 million compared to an income tax expense
of $186,000 during the three months ended March 31, 2000. The expense or benefit
resulted from the income or loss for the respective periods.

     Net Income (Loss). Net income increased $1.9 million from a net loss of
$1.7 million during the three months ended March 31, 1999 to net income of
$204,000 during the three months ended March 31, 2000 as a result of the factors
discussed above.

                                      S-31
<PAGE>   34

YEAR ENDED 1998 COMPARED TO 1999

     Revenues. Total revenues increased $70.8 million, or 58%, from $121.8
million in 1998 to $192.6 million in 1999. This increase was attributable to
increases of 75% in carriers' carrier, 130% in integrated services and offset by
a decrease of 6% in systems services revenue.

     Carriers' carrier revenue increased $60.6 million from $80.6 million in
1998 to $141.2 million in 1999. The 75% increase resulted primarily from the
sale of IRUs and dark fiber leases. Minutes of use associated with our carrier
business increased from approximately 739.9 million minutes in 1998 to 861.7
million in 1999. The average revenue per carrier minute was approximately $0.11
per minute in 1998 and $0.16 per minute in 1999. The increase in the revenue per
minute is attributable to a higher percentage of international traffic
terminated to countries (other than Mexico) with a higher revenue per minute
rate. We anticipate that long distance competitive pressures will continue to
drive down prices, but the price decline will be partially offset by increased
volumes. Fiber related revenues, attributed to IRUs, increased $66.6 million
from $9.5 million in 1998 to $76.1 million in 1999. We anticipate revenue for
IRUs to continue at comparable levels through 2000 and decline in subsequent
years. However, period-to-period fluctuations can be expected as this type of
revenue is affected by the negotiation and terms of these contracts and the
build out of our network. We derived approximately $42.6 million and $37.9
million or 35% and 20% of our revenue from traffic terminated to international
countries in 1998 and 1999, respectively. Revenue per minute for a majority of
the international countries, particularly Mexico, continues to decrease as a
result of deregulation in the countries and increased competition.

     Integrated services revenue increased $12.4 million from $9.5 million in
1998 to $21.9 million in 1999. The 130% increase was attributable to growth in
the number of business customers both from increased penetration in our existing
markets and from the deployment of our network into new markets. Access lines
sold increased from 5,736 at the end of 1998 to 61,067 at the end of 1999.
Installed access lines increased from 5,736 at the end of 1998 to 40,422 at the
end of 1999. Our direct sales force increased from 75 at the end of 1998 to 200
at the end of 1999. We now have sales offices in Dallas, Fort Worth, Houston,
San Antonio, Austin, Corpus Christi and Victoria, Texas, Lafayette and New
Orleans, Louisiana and Phoenix, Arizona. We anticipate increased revenue from
integrated services as our networks are further deployed in new markets and as
our sales force for this revenue segment continues to grow.

     Systems services revenue decreased $2.0 million from $31.6 million in 1998
to $29.6 million in 1999. The 6% decrease was attributable to a moderate
reduction in the leasing and sale of voice and data systems and fewer projects
involving the engineering and integration of telecommunications systems and
sales, service and maintenance of telecommunications equipment. We anticipate
systems services revenue in 2000 will remain at levels comparable to 1999.

     Cost of Services. Cost of services increased $32.5 million, or 39%, from
$83.2 million in 1998 to $115.7 million in 1999. The increase in cost of
services was primarily attributable to the continued growth in revenue. The
eight percentage point increase in gross margin from 32% to 40% resulted
primarily from lower per minute costs attributable to higher traffic over our
network and the sale of dark fiber. The increase in the gross margin in 1999 was
partially offset by lower margins attributable to international traffic. Gross
margins may vary in future periods as a result of these and other factors.

     Selling, General and Administrative Expenses. SG&A include salaries,
benefits, occupancy costs, commissions, sales and marketing expenses and
administrative expenses. SG&A increased $33.0 million, or 140%, from $23.5
million in 1998 to $56.5 million in 1999. The increase resulted primarily from
the additional personnel required to support our growth, advertising to increase
name recognition and brand awareness and additional sales commission payments.

     We recorded merger related expenses of $2.3 million in 1998, as compared to
no such costs in 1999. The merger related expenses relate to the business
combination of CapRock Telecommunications, CapRock Fiber and IWL Communications,
our predecessor companies. This combination was consummated on August 26, 1998.
The merger related expenses consist of fees for investment bankers, attorneys,
accountants, financial printing and other related charges.

                                      S-32
<PAGE>   35

     Depreciation and Amortization Expense. Depreciation and amortization
expense increased $4.8 million, or 98%, from $4.9 million in 1998 to $9.7
million in 1999. This increase resulted primarily from additional fiber segments
placed in service and purchases of additional equipment and other fixed assets
to accommodate our growth. We expect that depreciation and amortization expense
will continue to increase in subsequent periods as we continue to expand our
facilities and place additional fiber segments in service.

     Interest Expense. Interest expense increased $17.8 million from $9.5
million in 1998 to $27.3 million in 1999. The increase resulted from interest
expense related to our 1998 Senior Notes and our 1999 Senior Notes. See
"-- Liquidity and Capital Resources." Interest expense is anticipated to
increase in 2000, as a result of a revolving credit facility that we expect to
obtain. However, there can be no assurances that the revolving credit facility
will occur.

     Interest Income. Interest income increased $6.4 million from $3.0 million
in 1998 to $9.4 million in 1999. The increase was attributable to the interest
and investment accretion associated with the marketable securities purchased
with the proceeds from our 1998 Senior Notes and our 1999 Senior Notes.

     Income Tax Expense (Benefit). In 1998, we incurred income tax expense of
$1.3 million compared to an income tax benefit of $2.1 million in 1999. The
expense or benefit resulted from the income or loss for the respective periods.
The effective tax rates for 1998 and 1999 were 85% and 37%, respectively. The
effective tax rate for 1998 was higher than the effective tax rate for 1999 due
to the non-deductibility of certain merger related costs.

     Net Income (Loss). Net income decreased $3.7 million from net income of
$223,000 in 1998 to a net loss of $3.5 million in 1999 as a result of the
factors discussed above.

YEAR ENDED 1997 COMPARED TO 1998

     Revenues. Total revenues increased $46.5 million, or 62%, from $75.3
million in 1997 to $121.8 million in 1998. The 62% increase was attributable to
increases of 93% in carriers' carrier, 10% in integrated services and 27% in
systems services revenue.

     Carriers' carrier revenue increased $38.8 million from $41.8 million in
1997 to $80.6 million in 1998. The 93% increase resulted primarily from the
rapid growth in domestic and international switched services sold to other
carriers and as a result of $9.5 million in IRUs in 1998; no such revenue from
IRUs was recorded before 1998.

     Integrated services revenue increased $876,000 from $8.6 million in 1997 to
$9.5 million in 1998. The 10% increase was attributable to growth in the number
of business customers both from increased penetration in our existing markets
and from the deployment of our network into new markets. Access lines sold and
billable access lines increased from none at the end of 1997 to 5,736 at the end
of 1998.

     Systems services revenue increased $6.7 million from $24.9 million in 1997
to $31.6 million in 1998. The 27% increase was attributable to growth associated
with the leasing and sale of voice and data systems and projects involving the
engineering and integration of telecommunications systems and sales, service and
maintenance of telecommunications equipment. In 1997, system services revenue
included product resale revenue of $2.9 million as compared to no product
resales in 1998. The product resales to a single customer were substantially
complete in May 1997 and such revenues are not expected to contribute in a
material manner in future years.

     Cost of Services. Cost of services increased $30.7 million, or 58%, from
$52.5 million in 1997 to $83.2 million in 1998. The increase in cost of services
was primarily attributable to the continued growth in all three revenue
categories. The two percentage point increase in gross margin from 30% to 32%
resulted primarily from lower per minute costs attributable to higher traffic
over our network and the sale of dark fiber. The increase in the gross margin in
1998 was partially offset by lower margins attributable to international
traffic, which carries a lower gross margin percentage. Gross margins may vary
in future periods as a result of these and other factors.

                                      S-33
<PAGE>   36

     Selling, General and Administrative Expenses. SG&A increased $9.4 million,
or 67%, from $14.1 million in 1997 to $23.5 million in 1998. The increase
resulted primarily from the additional personnel required to support our growth,
advertising to increase name recognition and brand awareness, and additional
sales commission payments.

     We recorded merger related expenses of $2.3 million in 1998, as compared to
no such costs in 1997. The merger related costs relate to the business
combination of CapRock Telecommunications, CapRock Fiber and IWL Communications,
our predecessor companies. This combination was consummated on August 26, 1998.
The merger related expenses consist of fees for investment bankers, attorneys,
accountants, financial printing and other related charges.

     Depreciation and Amortization Expense. Depreciation and amortization
expense increased $1.6 million, or 48%, from $3.3 million in 1997 to $4.9
million in 1998. This increase resulted primarily from purchases of additional
equipment and other fixed assets to accommodate CapRock's growth. We expect that
depreciation and amortization expense will continue to increase in subsequent
periods as we continue to expand our facilities.

     Interest Expense. Interest expense increased $7.8 million from $1.7 million
in 1997 to $9.5 million in 1998. The increase resulted from interest expense
related to our 1998 Senior Notes. See "-- Liquidity and Capital Resources."

     Interest Income. Interest income increased $2.9 million from $132,000 in
1997 to $3.0 million in 1998. The increase was attributable to the interest and
investment accretion associated with the marketable securities purchased with
the proceeds from our 1998 Senior Notes.

     Income Taxes. Income tax expense of $1.5 million in 1997 was comparable to
the income tax expense of $1.3 million in 1998. The effective tax rate was 37%
in 1997 as compared to 85% in 1998. The increase in the effective tax rate was
primarily attributable to certain non-deductible merger related expenses in the
amount of approximately $1.8 million.

     Net Income. Net income decreased $2.3 million, or 91%, from $2.6 million in
1997 to $223,000 in 1998 as a result of the factors discussed above.

LIQUIDITY AND CAPITAL RESOURCES

     We had cash, cash equivalents and marketable securities of $97.3 million at
December 31, 1998, as compared with $188.3 million at December 31, 1999. The
increase was attributable to our debt and equity offerings completed during the
second quarter of 1999. This increase was partially offset by the utilization of
cash, cash equivalents and marketable securities for the build out of our fiber
network and increase in corporate overhead to support our growth. Our cash, cash
equivalents and marketable securities decreased from $188.3 million at December
31, 1999 to $110.2 million at March 31, 2000. The decrease was attributable to
the utilization of cash, cash equivalents and marketable securities for the
build out of our fiber network and increase in corporate overhead to support our
growth.

     Our cash flow provided from operating activities for 1998 was $7.1 million
as compared to $13.3 million used in operating activities during 1999. Our cash
flow used in operating activities for the three months ended March 31, 1999 was
$9.7 million as compared to $3.4 million used in operating activities during the
three months ended March 31, 2000. These changes were primarily attributable to
an increase in accounts receivable and unbilled services, and the timing of
certain capital expenditure payments to vendors relating to our fiber network
build out. IRU transactions for network segments under construction typically
have longer payment terms than other accounts receivable activity due to
contractual milestones that must be met before payments are made.

     Cash used in investing activities in 1998 and 1999 was $134.4 million and
$264.6 million, respectively. Cash provided by investing activities during the
three months ended March 31, 1999 was $13.8 million as compared to cash provided
by investing activities during the three months ended March 31, 2000 of $2.2
million. Capital resources used for the purchase of property, plant and
equipment increased

                                      S-34
<PAGE>   37

$164.4 million from $36.9 million in 1998 to $201.3 million in 1999, and
increased $63.2 million from $23.8 million during the three months ended March
31, 1999 to $87.0 million during the three months ended March 31, 2000. These
increases primarily related to the purchase of telecommunications equipment and
costs incurred with the build out of our fiber network. In 1998, we used $145.0
million to invest in marketable securities as compared to $283.6 million in
1999. Cash received from the sale of marketable securities was $48.0 million in
1998, $198.0 in 1999 and $77.5 million during the three months ended March 31,
2000.

     In July 1998, we issued $150 million aggregate principal amount of our 1998
Senior Notes. Interest on the 1998 Senior Notes is payable semi-annually in
arrears on January 15 and July 15 of each year, which commenced January 15,
1999, at the rate of 12% per year. The net proceeds from the offering of our
1998 Senior Notes was approximately $145 million, a portion of which was used to
repay all of our then-existing debt obligations, totaling $26.8 million.

     In May 1999, we sold 4,000,000 shares of our Common Stock at a price of
$22.00 per share in a public offering. We received net proceeds, after deducting
underwriting discounts and expenses payable by us, of approximately $81.9
million from the sale of our Common Stock.

     In May 1999, we issued $210 million aggregate principal amount of our 1999
Senior Notes. Interest on the 1999 Senior Notes is payable semi-annually in
arrears on May 1 and November 1 of each year, which commenced November 1, 1999,
at the rate of 11 1/2% per year. We received net proceeds from that offering,
after deducting the initial purchasers' discount and estimated expenses, of
approximately $201.2 million.

     The indentures governing the 1998 Senior Notes and the 1999 Senior Notes
contain certain restrictive operating and financial covenants, including
restrictive covenants relating to borrowing additional money, paying dividends
or making other distributions to our shareholders, limiting the ability of
subsidiaries to make payments to us, making certain investments, creating
certain liens on our assets, selling certain assets and using the proceeds from
those sales for certain purposes, entering into transactions with affiliates and
engaging in certain mergers or consolidations. The 1999 Senior Notes are senior
unsecured obligations and as such rank pari passu in right of payment with our
existing 1998 Senior Notes and with all of our future unsecured and
unsubordinated indebtedness. All of the covenants are subject to a number of
important qualifications and exceptions. These covenants may adversely affect
our ability to finance our future operations or capital needs or to engage in
other business activities that may be in our best interests.

     The remaining proceeds from the 1998 Senior Notes, the 1999 Senior Notes
and the Common Stock sold in May of 1999 have been, and will be, used to fund
capital expenditures for the construction of our fiber network, switching
equipment and other capital expenditures and to expand our sales offices, for
potential acquisitions and for general working capital purposes. Unutilized
funds have been invested in short-term, high-grade investment securities
classified as available for sale.

     We recently obtained a commitment letter from The Chase Manhattan Bank for,
and began finalizing, a $100 million senior secured credit facility. The final
terms and conditions of the credit facility will depend on negotiation of
definitive documentation, which we expect will contain customary restrictive
covenants, including financial covenants.

     We expect to require significant financing for future capital expenditure
and working capital requirements. Capital will be required to, among other
things, (1) fund the construction and operation of our fiber network, including
the portion to be constructed through joint build arrangements with AT&T,
Pathnet, 360networks Inc. and Enron Broadband Services, to approximately 6,200
route miles throughout the Southwest region by the end of 2000 and to
approximately 7,500 route miles by the end of 2001, (2) fund the purchase and
installation of voice and data switches, (3) fund the installation of equipment
associated with DSL services and the build out of collocation facilities, (4)
fund the further development of our OSS and information technology equipment,
and (5) open an additional seven sales offices in 2000 and add sales support and
customer service personnel in markets throughout Texas, Louisiana, Oklahoma,
Arkansas, New Mexico and Arizona. We currently estimate that our aggregate
capital requirements will

                                      S-35
<PAGE>   38

total approximately $380 million for 2000 and approximately $420 million for
2001. We believe our cash, cash equivalents and marketable securities, and cash
flow from operations, together with the expected net proceeds from this offering
and the $100 million credit facility will be sufficient to fund our capital
requirements through the end of 2000. However, we cannot assure you that we will
be successful in finalizing the terms of the credit facility. We will require
additional sources of capital to fund our capital expenditure requirements for
2001. We cannot assure you that the additional sources of capital will be
available, that the anticipated sources of working capital will continue to be
available, that we have anticipated all future costs, or that our expected
financial resources will be sufficient to cover future expenditures. If we are
unable to obtain additional sources of capital, we may have to curtail our level
of expenditures and our rate of expansion, which may adversely impact our future
operating performance.

     We may require additional capital in the future for new business activities
related to our current and planned businesses, or in the event we decide to make
acquisitions, enter into joint venture and strategic alliances or expand into
new geographic regions. Sources of additional capital may include cash flow from
operations, public or private equity financings (which may include preferred
stock offerings) and debt financings, bank debt and vendor financings. In
addition, we may enter into joint construction agreements with carriers, thereby
reducing our capital expenditure requirements. However, we cannot assure you
that we will be successful in producing sufficient cash flow or raising
sufficient debt or equity capital to meet our strategic business objectives or
that such funds, if available, will be available on a timely basis and on terms
that are acceptable to us. If we are unable to obtain such capital, the build
out of portions of our expanded network may be significantly delayed, curtailed
or abandoned. In addition, we may accelerate the rate of deployment of our
network, which in turn may accelerate our need for additional capital. Our
actual capital requirements will also be affected, possibly materially, by
various factors, including the timing and actual cost of the deployment of our
network, the timing and cost of expansion into new markets, the extent of
competition and the pricing of dark fiber and telecommunications services in our
markets.

NEW ACCOUNTING PRONOUNCEMENTS

     In June 1998, the FASB issued SFAS No. 133, "Accounting for Derivative
Instruments and Hedging Activity" ("SFAS 133") which requires that all
derivatives be recognized in the statement of financial position as either
assets or liabilities and measured at fair value. In addition, all hedging
relationships must be designated, reassessed and documented pursuant to the
provisions of SFAS No. 133. In June 1999, FASB delayed the effectiveness of SFAS
133 to fiscal years beginning after June 15, 2000. The adoption of SFAS 133 will
not have an impact on our financial position, results of operations and cash
flow.

     In June 1999, the Financial Accounting Standards Board (the "FASB") issued
Interpretation No. 43, "Real Estate Sales, an interpretation of FASB Statement
No. 66." The interpretation is effective for sales of real estate with property
improvements or integral equipment entered into after June 30, 1999. Under this
interpretation, dark fiber is considered integral equipment and accordingly,
title must transfer to a lessee in order for a lease transaction to be accounted
for as a sales-type lease. The application of the provisions of FASB
Interpretation No. 43 did not have an impact on our financial position, results
of operations and cash flow.

     In December 1999, the SEC staff issued Staff Accounting Bulletin No. 101,
"Revenue Recognition in Financial Statements" ("SAB 101"). SAB 101 summarizes
certain of the staff's views in applying General Accepted Accounting Principles
to revenue recognition and accounting for deferred costs in the financial
statements. Based on our current revenue recognition policies, SAB 101 is not
expected to materially impact our financial position, results of operations and
cash flow.

CONTINGENCIES

     We are party to ordinary litigation incidental to our business. No
currently pending litigation is expected to have a material adverse effect on
our business, financial condition, results of operations and cash flow.

                                      S-36
<PAGE>   39

YEAR 2000 READINESS

     We established a year 2000 committee made up of leaders from our
operational areas to assess our year 2000 readiness. The committee had the
involvement of senior management and the Board of Directors and its objectives
were a top priority. We undertook various initiatives intended to provide that
computer equipment and software would function properly with respect to dates in
the year 2000 and thereafter. We experienced no problems in our critical systems
subsequent to December 31, 1999 related to the year 2000, nor did we incur any
problems from critical system services provided by third parties. We spent less
than $250,000 addressing our year 2000 readiness through the end of 1999.

MARKET RISK

     We are exposed to market risk from changes in marketable securities (which
consist of money market and commercial paper). At March 31, 2000, our marketable
securities were recorded at a fair value of approximately $105 million, with an
overall weighted average return of approximately 5% and an overall weighted
average life of less than one year. The marketable securities held by us have
exposure to price risk, which is estimated as the potential loss in fair value
due to a hypothetical change of 50 basis points (10% of our overall average
return on marketable securities) in quoted market prices. This hypothetical
change would have an immaterial effect on the recorded value of the marketable
securities.

     We are not exposed to material future earnings or cash flow fluctuations
from changes in interest rates on long-term debt since 100% of our long-term
debt is at a fixed rate as of March 31, 2000. The fair value of our long-term
debt at March 31, 2000 was estimated to be $339 million based on the overall
rate of the long-term debt of 11.71% and an overall maturity of nine years
compared to terms and rates currently available in long-term financing markets.
Market risk is estimated as the potential decrease in fair value of our
long-term debt resulting from a hypothetical increase of 117 basis points in
interest rates (ten percent of our overall borrowing rate). Such an increase in
interest rates would result in approximately an $8 million decrease in fair
value of our long-term debt. To date, we have not entered into any derivative
financial instruments to manage interest rate risk and are currently not
evaluating the future use of any such financial instruments.

     We do not currently have any material exposure to foreign currency
transaction gains or losses. Substantially all business transactions are in U.S.
dollars. To date, we have not entered into any derivative financial instrument
to manage foreign currency risk and are currently not evaluating the future use
of any such financial instruments.

                                      S-37
<PAGE>   40

                                    BUSINESS

OVERVIEW

     We are a leading facilities-based integrated communications service
provider to small and medium-sized business and communications carrier customers
in the Southwestern United States. We offer business customers an integrated
bundle of communications products and services including local exchange,
domestic and international long distance, enhanced voice, data, Internet and
dedicated private line services. Additionally, we offer our
communications-intensive business and carrier customers dark fiber, high
bandwidth dedicated fiber infrastructure, terminating access for domestic and
international long distance and ATM, frame relay and IP data transport services.
We believe that our current and planned networks will provide our customer base
the most comprehensive service alternative to the incumbent and other
competitive communications service providers in our region.

     Our communications services are provided over our scalable fiber, voice and
data networks which, upon completion, will connect nearly every Tier I, Tier II
and Tier III market in the six-state region of Texas, Louisiana, Arkansas,
Oklahoma, New Mexico and Arizona. At March 31, 2000, our inter-city long-haul
fiber network, consisting primarily of 96 fiber strands, covered approximately
3,700 route miles, which we expect to expand to approximately 6,200 route miles
by year-end 2000. Additionally, at March 31, 2000, we provided switch-based
competitive local exchange services in ten markets, which we expect to expand to
48 markets by year-end 2000. At March 31, 2000, we had 12 voice and 15 data
switches installed and operational on our network.

     We have recently expanded and extended our business plan to allow us to
provide our current and future customers with a broader array of services
delivered over our networks. Specifically, we plan to:

     - Increase our number of central office collocations from 51 at March 31,
       2000 to 200 by year-end 2000,

     - Introduce DSL services from approximately 100 collocations by year-end
       2000,

     - Construct 22 intra-city metro fiber loops, consisting primarily of 192
       fiber strands, which will add approximately 80 route miles to our fiber
       backbone by year-end 2000, and

     - Expand our total fiber network to approximately 7,500 route miles by
       year-end 2001, including adding 1,250 route miles to our inter-city
       long-haul fiber network routes.

     We believe our expanded local exchange network and data network in
combination with our regional fiber network provide us with a number of
important advantages including our ability to:

     - Reach a broader customer base within our region,

     - Provide switching infrastructure to penetrate the local exchange market
       in our region while reducing the cost of providing local access by
       leasing copper lines from the ILEC as an unbundled network element,

     - Offer high-speed broadband access over DSL, which provides a digital
       connection for carrying voice and data traffic over leased copper lines,

     - Aggregate regional voice and data traffic over our own fiber backbone,
       and

     - Significantly enhance our operating margins and returns on invested
       capital.

     In addition, we believe that a substantial market opportunity exists for us
in our target markets as a result of the following factors:

     - Attractive growth dynamics of the Southwest region,

     - Growing demand for data services and Internet services,

                                      S-38
<PAGE>   41

     - Need for integrated communications solutions for small and medium-sized
       businesses,

     - Increasing communications needs of high-end, multi-line residential
       customers, and

     - Rapidly developing telecommunications technologies.

     We introduced electronic bonding, which is the on-line and real-time
connections of our operations support systems with those of the ILECs, beginning
with Southwestern Bell in Texas in the fourth quarter of 1999. We are determined
to achieve electronic bonding with the ILECs in most of our markets by the end
of 2000. This electronic interface allows us to create service requests on-line,
leading to faster installations of customer orders and a reduction in the number
of errors associated with multiple manual inputs. We expect electronic bonding
to improve productivity by decreasing the period between the time of sale and
the time the customer's line is installed on our network. For example,
electronic bonding with Southwestern Bell has enabled us to reduce our
provisioning times from approximately 25 business days to as few as five
business days. We also expect an automated process will reduce our selling,
general and administrative costs.

     We have begun, and will continue, to acquire and develop our back office
systems and procedures with vendors, including Metasolv, DSET, Sterling, Oracle,
RiverRock, Micromuse, Viryanet and Portal. We believe these platforms provide us
with a competitive advantage in terms of reducing costs, processing large order
volumes for multiple products and services, providing bundled bills and billing
options over the Internet and enhancing customer service. Our back office
systems enable us to enter, schedule and track a customer's order from the point
of sale to the installation and testing of service. These systems interface with
each other and include order entry, credit approval, provisioning, billing,
collection, customer service, trouble management, monitoring, facilities
inventory management and reporting systems.

BUSINESS STRATEGY

     We are determined to be the Southwest's dominant integrated communications
service provider to small and medium-sized businesses. We believe these
customers are under-served by their current providers and are seeking value,
simplicity and outstanding customer service from a single communications
provider. We also believe that our margins and returns on invested capital
quickly increase as we bundle our products together and provide them over our
fiber, voice and data networks. The key components of our strategy include the
following:

     Provide One-Stop Integrated Communications Services to Small and
Medium-Sized Businesses. We offer "one-stop shopping" to our target business
customers by giving them the ability to purchase most communications services
from a single supplier. We believe that bundled services provided on a single
bill enable us to better meet the needs and expectations of our customers,
rapidly penetrate our target markets, capture a larger portion of our customers'
communications expenditures and enhance customer loyalty. We believe that sales
of integrated communications products and services to customers will
increasingly become a major source of our revenues and operating margins. We
offer the following services:

     - Local services, including enhanced voice services,

     - Domestic and international long distance services,

     - Data services, including frame relay, ATM and virtual private networks,

     - Internet services,

     - Dedicated private lines (including high-speed lines),

     - ISDN or integrated services digital network trunking, and

     - DSL services (which we expect to begin providing in the second half of
       2000), which will support both voice and data traffic.

                                      S-39
<PAGE>   42

     These comprehensive services are generally not available or bundled
together on a single bill by the ILECs, and, if available, they are usually
offered at relatively higher prices. By offering this bundle of services at
attractive prices, we believe that we can address customer desires for improved
value and simplicity, and thereby accelerate our ability to acquire new
customers and enhance customer loyalty.

     Pursue a Super-Regional Focus. We intend to continue targeting customers in
the Southwestern United States. We seek to be among the first to offer
integrated services in many of our smaller markets where there is little or no
competition to the ILECs. We believe that the Southwestern United States is
attractive due to:

     - Rapid population growth. According to statistics published by the U.S.
       Census Bureau, Texas is the second largest state, with a population of
       approximately 20 million, and experienced the second largest population
       growth among all states in the country during the last decade. The
       combined populations of Dallas/Fort Worth, Houston and San Antonio exceed
       the populations of each of 43 other states. We have been located in Texas
       since we were founded.

     - Rapid job creation. According to the U.S. Bureau of Labor statistics, 20%
       of all jobs created in the U.S. during the 1990's were created in the
       Southwest region with Texas and Arizona ranking first and seventh,
       respectively. During the 1990's, the Southwest region created
       approximately 4.1 million new jobs.

     - Number of access lines. Based on statistics published by the FCC, in 1998
       there were approximately 20.4 million total local access lines in our
       six-state region, of which approximately 7.7 million were business lines
       and approximately 12.7 million were residential lines.

     - Limited competition. We believe that ILECs still control approximately
       95% of all local access lines in the Southwest region. Limited
       competition exists in markets outside the major metropolitan areas. We
       believe most national competitors are concentrating their efforts only on
       the top five markets in the region, and ignoring most other markets.

     - Traffic patterns. We believe that a substantial portion (estimated to be
       as high as 70%) of all voice traffic in the Southwestern United States
       originates and terminates within the region. In addition, traffic
       continues to increase rapidly between the United States and Mexico. We
       believe that over half of the traffic between the United States and
       Mexico passes through border crossings along the Texas border.

     Complete the Southwest Region's Most Extensive Competitive Fiber, Voice and
Data Networks. We are building the Southwest region's most extensive competitive
fiber network, which is comprised primarily of 96 fiber strands pulled through
one of four conduits buried below ground. By year-end 2000, our fiber network
will span 6,200 route miles (including 22 metro fiber loops in key markets) and
will be extremely scalable. A key element of our strategy is to reduce the cost
basis of fiber we retain for our own use by sharing construction costs with
other carriers and to quickly recover our investment by selling excess dark
fiber. We plan to retain at least 24 fiber strands throughout our entire
network. We are also building a competitive local exchange service in 48 markets
where we will provide Class 5 switching functionality and DSL services to our
local customers. Our data network will comprise data switches and fiber capacity
that will connect all of these markets in our region, supporting ATM, frame
relay and IP traffic. In many of these local markets we will install equipment
to backhaul our voice and data traffic to one of our switches in order to
significantly lower our capital requirements. We expect our fiber, voice and
data networks to be substantially completed in early 2001. Upon completion, our
networks will connect nearly every Tier I, Tier II and Tier III market in our
six-state region. We define Tier I, Tier II and Tier III markets according to
the population size of the market. A Tier I market means a market with a
population greater than 750,000 people. A Tier II market means a market with a
population between 200,000 and 750,000 people. A Tier III market means a market
with a population between 20,000 and 200,000 people.

     We intend to construct the most extensive, advanced and scalable network in
the region. By installing multiple conduits and a minimum of 96 fiber strands in
the first conduit, we are creating a robust network

                                      S-40
<PAGE>   43

that will have significant flexibility to add capacity to meet future customer
demand. The spare conduits enable us to cost-effectively deploy future
generations of fiber, by rapidly expanding capacity without the cost of new
construction. We believe that we can rapidly scale our network to support the
demands for increased bandwidth. In addition, we believe our networks are well
positioned to benefit from the current trend among data service providers to
push data closer to the customer in order to improve access speeds and reduce
long-haul bandwidth congestion. Finally, we intend to interconnect our network
with the networks of selected Mexican carriers at multiple border crossings,
creating future international opportunities, subject to various regulatory
requirements.

     Demand for dark fiber has been extremely strong, and we believe it will
remain strong through 2000. Our network has been designed to complement existing
major long-haul fiber networks. To the extent possible, our routes are
geographically diverse from the existing fiber networks of AT&T, WorldCom,
Sprint, and Qwest. By being one of the first to build new and diverse routes
through much of the region, we have the "first mover" opportunity of enabling
other carriers to buy fiber from us rather than building their own fiber
networks.

     Focus on Direct Sales to Small and Medium-Sized Business Customers. We use
a direct sales force to sell our communications products and services to
business customers. We believe that our face-to-face sales efforts coupled with
our personalized customer care through a single point of contact are highly
effective in penetrating, capturing and retaining market share among small and
medium-sized businesses. We believe that ILECs have generally neglected to
target small and medium-sized business customers with direct sales efforts. Our
sales management team is composed of executives with experience in managing a
large number of direct sales specialists in the telecommunications and data
networking industries.

     We expanded our direct sales force to 230 people at March 31, 2000. We
continue to successfully attract and retain highly qualified sales and support
personnel by offering them:

     - A competitive success-based compensation package emphasizing customer
       loyalty,

     - The opportunity to participate in our rewards and success through
       participating in our stock option programs,

     - The opportunity to work with an experienced and successful management
       team in building an entrepreneurial company, and

     - A complete set of communications products and services backed by advanced
       bundled billing and outstanding customer care.

     Pursue a "Smart Build" Local Strategy, While Maximizing Our Margins by
Emphasizing Facilities-Based Services. To maximize our speed to market and to
minimize investment risk, we intend to continue to pursue what we refer to as a
"smart build" strategy. Under this strategy, we:

     - Purchase and install switches,

     - Collocate our equipment in the central offices of ILECs, and

     - Lease unbundled network elements from the ILECs until growth justifies
       our investment in additional network assets.

     We believe this strategy offers numerous economic benefits. It reduces the
time to enter new markets to less than half of that required by the older
traditional CLEC models that were unable to use unbundled network elements. This
"smart build" strategy also reduces our initial capital expenditures and
investment risk, and we believe generates higher returns on invested capital
than strategies that build fiber networks to each customer.

     We intend to increase our collocation sites in ILEC central offices from 51
at March 31, 2000 to approximately 200 by year-end 2000. These collocations
enable us to access ILEC unbundled network

                                      S-41
<PAGE>   44

elements that provide direct connections to our customers. The operating margins
under this strategy are significantly higher than those margins from total
service resale of ILEC services. Our business plan expansion also includes
building and acquiring metro fiber loops in most of our major markets that will
connect our switching points of presence with many of the ILEC central offices
where we will be collocated. The metro fiber loops will replace the network
elements that we are leasing on a short-term basis from the ILECs and are
expected to provide us with higher operating margins and more efficient and
reliable services. We expect to have 22 metro fiber loops in place by year-end
2000.

     At the same time, we believe that we generate significantly higher
operating margins by using our own facilities to provide service rather than by
reselling services provided entirely on another carrier's facilities. Our voice
and data networks ride on our fiber network and will include 22 metro fiber
loops in key markets, which enables us to transport an increasing percentage of
our traffic on our own facilities. Consequently, as part of our "smart build"
strategy, we will selectively focus our marketing and sales activities on areas
where we can serve customers through a direct connection using unbundled loops
or high capacity circuits connected to our switching facilities, and where the
customer base in such target market justifies the additional investment in
network assets. These unbundled local loops generally are the "last mile"
twisted pair copper lines between the ILEC central offices and the end-user
customer.

     Leverage Our Networks to Serve High-End Residential Customers. We intend to
eventually target high-end, multi-line residential customers located in our
collocation coverage area to enhance our network efficiency and overall
profitability. More and more residential customers are telecommuting and
expanding their personal communications needs, resulting in increased
residential demand for local access lines, Internet services, data services and
DSL lines. We believe we can provide multi-line bundled voice and data services
to these customers at attractive margins in markets where we have already
collocated equipment in the central office of the ILEC and can lease local
exchange services as an unbundled network element. We believe we can effectively
target these customers in the future through telemarketing, direct mail, the web
and other sales channels.

     We do not intend to serve the needs of the entire residential marketplace,
but will target the needs of residences requiring multiple lines, enhanced local
services, long distance services, Internet and DSL services. Our bundled
products will be designed to capture attractive margins. We believe these
services can be profitably provided utilizing the unbundled network elements.
Customers would sign term contracts for services, could choose to be billed
electronically or pay by credit card and could access their accounts via the
Internet. We believe this approach helps to minimize potential churn, decrease
the cost of billing, accelerate payments receipt, reduce bad debt risk, and
provide superior customer service at a lower cost to us. We believe we can
effectively target these customers in the future through telemarketing, direct
mail, the web and other sales channels.

     Residential peak calling times typically offset business workday calling
patterns. By establishing a base of residential customers we believe we can
enhance our network efficiency and improve overall profitability. Most central
offices, especially in Tier II and Tier III markets, service both business and
residential customers. Once we establish collocations to support our business
customers, we believe we can generate attractive incremental profits at low
additional cost by targeting high-end residential customers with packaged
products. In addition, the peak hours for residential traffic differ from the
peak usage hours for business customers, improving overall network utilization
and efficiency. Margins increase further once DSL enables the provisioning of
multiple local lines over a single UNE local loop to the high-end, multi-line
residential customers. Finally, we believe that most CLECs are focused on
business customers, and that the competition is lower for bundled services to
residential customers.

     Leverage Our Efficient Back Office Systems. We are automating most of the
processes involved with switching a customer to our network. The goals of our
systems' design are to decrease the time between receipt of customer orders and
completion of service installation, to reduce overhead costs, to reduce fees
paid to transition customers from ILECs to CapRock and to improve customer
service. To achieve these goals, we are developing, acquiring and integrating
information technology systems and platforms to support our operations. We have
established and will continue to implement "electronic bonding," which is

                                      S-42
<PAGE>   45

the on-line and real-time connections of our operating systems with those of
ILECs. We have invested heavily in our information technology department and
have attracted outstanding, experienced telecommunications IT personnel. We have
developed and intend to roll out web-enabled ordering, billing and other
customer service features.

     Our back office systems have been designed to:

     - Provide real-time network visibility,

     - Enhance control and management of our networks and elements from a
       central location,

     - Rapidly scale,

     - Reduce duplication of order entry,

     - Minimize opportunities for manual order entry errors,

     - Synchronize multiple tasks during the provisioning process when
       turning-up different types of voice and data services,

     - Provide a single platform for bundled billing and customer care, and

     - Manage work flow processes, inventory, traffic and trouble ticketing
       procedures.

     Capitalize on Proven Management Team. Our veteran management team has
extensive experience and past successes in the communications industry. We
believe the quality, experience and teamwork of our management provides us with
the vision, leadership, knowledge, entrepreneurial energy and skills necessary
to successfully grow our business and succeed in the competitive communications
industry.

     - Jere W. Thompson, Jr. founded CapRock Fiber in 1992, became Chairman and
       President of CapRock Telecommunications in 1994 and has guided the
       development and growth of our company since that time. Mr. Thompson has
       served as Chief Executive Officer of CapRock since its formation in 1998.

     - Leo J. Cyr was named President and Chief Operating Officer of CapRock on
       October 18, 1999. Mr. Cyr joined our company after a 13-year career at
       WorldCom. Immediately prior to joining CapRock, Mr. Cyr was Senior Vice
       President of WorldCom's Intelligent Network Architecture and Development
       Organization. He previously held several senior management positions in
       the engineering, wireless, local, network operations and data services
       departments of WorldCom and was President, Chief Executive Officer and
       co-founder of Unisite, Inc.

     - Kevin W. McAleer is our Chief Financial Officer, has been with CapRock
       since early 1998 and has over 18 years experience as the Chief Financial
       Officer of several publicly held companies.

     - T. George Hess, a 31-year telecommunications veteran, joined CapRock on
       January 26, 2000 as Senior Vice President of Network Services overseeing
       operations, customer service and provisioning. Prior to joining CapRock,
       Mr. Hess was Assistant Vice President of Operations and Service Delivery
       for GTE Internetworking, a division of GTE providing Internet services to
       medium and large corporations. Prior to joining GTE, Mr. Hess was a
       Senior Vice President at MFS Communications Company Inc. and a Vice
       President at Sprint.

     - Claude A. Robertson is our Senior Vice President of Carrier Sales and has
       been with the company since 1998. Previously, Mr. Robertson was City Vice
       President for MFS WorldCom, Inc. in Denver. Prior to joining MFS
       WorldCom, Mr. Robertson served as Senior Account Executive at MFS
       Communications.

     - Kenneth L. Monblatt became Senior Vice President and Chief Information
       Officer on February 2, 2000. Mr. Monblatt joined CapRock after serving in
       the same position at PageNet. Previously, Mr. Monblatt established
       PrimeCo Personal Communication's Information Technology department and
       served as its departmental director.

                                      S-43
<PAGE>   46

MARKET OPPORTUNITY

     We believe that a substantial market opportunity exists for us as a result
of the following factors:

     - Attractive growth dynamics of the Southwest region,

     - Growing demand for data services and Internet services,

     - Need for integrated communications solutions,

     - Increasing communications needs of high-end, multi-line residential
       customers, and

     - Rapidly developing telecommunications technologies.

     Attractive growth dynamics of the Southwest region. Based on FCC statistics
at the end of 1998, which we believe is the most recently available data, ILECs
still control almost 95% of the Southwest local service market, and the
population of the Southwest region is large and growing rapidly. According to
statistics provided by the U.S. Census Bureau, Texas is the second largest state
in the U.S., with a population of approximately 20 million. Over the past ten
years, Texas was the second fastest growing state in terms of total population
and was the fastest growing state in terms of new job creation. According to the
U.S. Bureau of Labor statistics, 20% of all jobs created in the U.S. during the
1990s were created in the Southwest region with Texas and Arizona ranking first
and seventh, respectively. During the 1990s, the Southwest region created
approximately 4.1 million new jobs. The combined population of the Dallas/Ft.
Worth, Houston and San Antonio metropolitan areas exceeds the populations of
each of 43 other states. Based on statistics published by the FCC, in 1998 there
were approximately 20.4 million total local access lines in our six-state
region, of which approximately 7.7 million were business lines and approximately
12.7 million were residential lines.

     Growing demand for data services and Internet services. Demand for
bandwidth is being fueled by the demand for data and Internet services.
According to market studies by Frost & Sullivan the total U.S. broadband access
services market is expected to grow at an annual rate of approximately 25%, from
$18 billion in 1999 to over $55 billion in 2004. During this period, the U.S.
market for ATM, frame relay and public data services is expected to grow from
over $6 billion to approximately $13 billion. Although rapid access to
information and the ability to distribute it quickly through the use of data
connections are critical to businesses, many of the nation's businesses,
especially small and medium-sized businesses located in Tier II and Tier III
markets, do not have access to data services. Much of the growth is expected to
result from increased demand for e-mail, web hosting services, e-commerce,
collaborative workflow and real-time video services and applications. In
addition, the proliferation of local area networks, wide area networks, private
networks, Internet services, e-mail and other enhanced services has caused data
transmissions to become a significant and increasing portion of overall
telecommunications traffic. These services are expected to drive much of the
growth in the data communications market.

     Need for integrated communications solutions. Currently the vast majority
of the region's small and medium-sized business and high-end, multi-line
residential customers need to deal with multiple communications providers to
satisfy their communications needs. These customers tend to use the ILECs for
local services, long distance carriers for long distance services, equipment
integrators for on-premise voice and network systems, and Internet service
providers for Internet access and other services. As a result, we believe that
there exists a significant and growing demand from small and medium-sized
business and high-end, multi-line residential customers for the provision of
advanced telecommunications services from a single provider that can not only
provide a convenient bundled package of products and services, but also provide
integrated customer care and support.

     Increasing communications needs of high-end, multi-line residential
customers. More and more high-end, multi-line residential customers are
telecommuting and expanding their personal communications needs, resulting in
increased residential demand for local access lines, Internet services, data
services and DSL lines. We believe there is an opportunity for CLECs to provide
multi-line bundled voice and data services to these customers at attractive
margins in markets where CLECs have already collocated

                                      S-44
<PAGE>   47

equipment in the central office of the ILEC and can lease local access as an
unbundled network element. We believe we can effectively target these customers
in the future through telemarketing, direct mail, the web and other sales
channels to enhance our network efficiency and overall profitability.

     Rapidly developing telecommunications technologies. Advances in various
telecommunications technologies, such as high-speed optical transmission
electronics, dense wave division multiplexing ("DWDM"), and packet-switches are
reducing the cost structure of newly-deployed telecommunications networks.
High-speed OC-192 transmission electronics operate at approximately 10 billion
pulses of light per second, four times faster and far more cost effectively than
prior generation electronics. DWDM significantly increases the transmission
capacity of a single strand of fiber cable as it can increase the carrying
capacity of a single fiber 32 fold by allowing simultaneous transmission of up
to 32 optical channels per fiber. High performance packet switches break up data
into "packets." Compared to circuit switches, packet switches are almost half
the cost on a per port basis and utilize bandwidth more than ten times more
efficiently in the transmission of voice and data.

OUR FIBER, VOICE AND DATA NETWORKS

     Our communications services are provided over our scalable fiber, voice and
data networks, which upon completion will connect nearly every Tier I, Tier II
and Tier III market in our six-state region. At March 31, 2000, our inter-city
long-haul network covered approximately 3,700 route miles, which we expect to
expand to approximately 6,200 route miles by year-end 2000 and to approximately
7,500 route miles by year-end 2001. Additionally, at March 31, 2000, we provided
competitive local exchange services in ten markets, which we expect to expand to
48 markets by year-end 2000. At March 31, 2000, we had 12 voice and 15 data
switches (which we expect to expand to 17 data switches by year-end 2000)
installed and operational on our network.

     Our network is designed to be sufficiently scalable and flexible to meet
future demand and to accommodate advances in fiber technology and electronics.
We are burying three to four conduits throughout our network. These conduits are
shared with our joint build partners, for those segments in our network we are
jointly building with others. In one of our conduits, we are installing a
minimum combination of 96 single mode and Lucent Truewave or comparable fibers.
We are retaining, at a minimum, at least one spare conduit for future use. Both
Truewave and single-mode fiber are capable of supporting DWDM. We intend to
retain at least 24 fiber strands throughout most of our network. The routes of
the network are primarily constructed on state highway and county road rights of
way, and are planned to be generally geographically diverse from the existing
fiber networks of AT&T, Sprint, and WorldCom. We plan to interconnect our fiber
network with the fiber networks of selected Mexican carriers at multiple border
crossings, subject to various regulatory requirements.

     We intend to have Class 5 switching functionality in all markets in which
we provide competitive local exchange services. In many of these local markets
we will install equipment to backhaul our voice and data traffic to one of our
switches in order to significantly lower our capital requirements. We have two
switches located in each of Dallas, Texas and Phoenix, Arizona. We also have one
switch in each of Houston, San Antonio, Victoria, Austin and McAllen, Texas,
Lafayette, Louisiana and Oklahoma City, Oklahoma. We lease one switch in Jersey
City, New Jersey. Our regional network is controlled and monitored by a state of
the art network operations center located in Dallas. Our network operations
center in Houston supports our Dallas network operations center, providing back
up in the event of a network failure. Locally based switch engineers and
technicians also manage each switch.

     We generally lease local network trunking facilities from the ILEC and/or
one or more CLECs in order to connect our switch to major ILEC central offices
serving the central business district and outlying areas of business
concentrations. Our switch is also connected to ILEC tandem switches and certain
interexchange carrier points-of-presence. To access the largest number of
customers possible without having to lay fiber to each of their premises, we
locate access equipment such as integrated digital loop carriers, DSL access
multiplexers and related equipment in each of the ILEC central offices.

                                      S-45
<PAGE>   48

     As each customer is signed up, we provide service by leasing unbundled
loops from the ILEC to connect our integrated digital loop carriers located in
the central office to the customer premise equipment. For large business,
government, or other institutional customers or for numerous customers located
in large buildings, it can be more cost-effective for us to lease ILEC or CLEC
capacity, or a wireless local loop from one of the emerging wireless CLECs, to
connect the customer to our network. In these cases, we will locate our
integrated digital loop carriers or other equipment in the customer's building.

     In order to provide comprehensive geographic service coverage to customers
with locations in areas beyond the reach of central offices where we have
established collocations, we generally provide services utilizing tariffs
commonly referred to as "UNE-P." These tariffs enable us to purchase multiple
unbundled network elements from the ILEC, including the element that packages
all of the elements back together to provide local service dial tone and
advanced local features. The UNE-P platform tariff was mandated by the FCC in
its UNE Remand Order in November 1999 in order to accelerate local service
competition in urban and rural markets. The FCC has said it will review the
Order again in three years. The Order remains subject to FCC and court review.

     In addition to being lower in cost than total service resale, UNE-P mirrors
UNEs in treatment of access fees. With total service resale, the ILEC is capable
of charging and retaining originating and terminating access fees for long
distance calls. These fees are generally a few cents per minute on both the
originating and terminating ends. With UNEs and UNE-P, no originating fees are
charged to us by the ILEC. Additionally, with these tariffs we are able to
charge other long distance companies a terminating access fee for completing
their long distance call to our local service customer. By bundling long
distance together with local service provided over UNE and UNE-Ps, the economics
of long distance change dramatically and positively. By carrying end to end
traffic on our own network, the variable cost of carrying a long distance call
from one of our customers to another of our customers drops from several cents
per minute to a fraction of a cent per minute. These attractive economics will
position us to compete profitably as competition in the long distance market
opens up to RBOCs.

     Joint Build Projects. To reduce the cost of fiber retained for our own use,
we have sold in the past, and intend to sell in the future, conduit and dark
fiber to third parties. In addition, we have entered into the following joint
build arrangements, which account for approximately 63% of the route miles of
our planned network construction:

  Enron Broadband Services, Inc.:

     In February 1999, we completed a joint build agreement with Enron Broadband
Services, Inc. for approximately 1,070 miles of fiber network in Texas. The
joint build arrangement is complete, connecting Amarillo, Lubbock, Dallas, Fort
Worth, Waco, Bryan, Austin, San Marcos, San Antonio and Houston, Texas. After
the sales of IRUs and the division of fiber and conduits between us and Enron,
we received 56 fibers and one spare conduit.

  Pathnet:

     In November 1999, we entered into a project with Pathnet to jointly build a
350-mile fiber network between Albuquerque, New Mexico and El Paso, Texas. We
will each own one conduit and will jointly own the two remaining conduits.
Construction began in the first quarter of 2000 with completion expected by
year-end 2000.

  AT&T:

     In December 1999, we entered into a regional joint build construction
effort with AT&T to jointly build approximately 1,450 miles of fiber network.
The fiber ring passes through Dallas and Tyler, Texas; Shreveport and Monroe,
Louisiana; Pine Bluff, Little Rock and Fort Smith, Arkansas; Muskogee, Oklahoma
City, Norman and Lawton, Oklahoma; and Wichita Falls, Denton and Fort Worth,
Texas. We are installing a four conduit facility with AT&T, with each company
owning one conduit and sharing the other two. In the past, we have jointly
constructed segments with Teleport Communications Inc., a
                                      S-46
<PAGE>   49

competitive local phone company, and with TCI Communications Inc., a cable
television company, both of which are now owned by AT&T.

  360networks:

     In January 2000, we entered into a regional joint build construction effort
with 360networks to jointly build approximately 1,300 miles of fiber network
through Texas, New Mexico and Arizona. This will also allow us to increase the
speed to market of our voice and high-speed data services to cities along the
route, including Tucson, Arizona; Santa Fe and Albuquerque, New Mexico; and El
Paso, Midland, San Angelo, and Temple, Texas. The co-build agreement calls for
us to construct a Texas fiber route from El Paso through Temple to Austin, while
360networks is responsible for laying fiber west of El Paso through Tucson and
into Phoenix. We will each own one conduit and will jointly own the two
remaining conduits. Construction began in the first quarter of 2000 with
completion expected in early 2001.

     These joint build arrangements provide several benefits, including
reduction of construction costs, accelerated acquisition of rights of way, the
majority of which are substantially completed, and the freeing up of resources
to focus attention on the construction of other portions of the network. Each
city-pair segment of our fiber network is operational upon completion of
construction. Should network construction be slowed or postponed, our existing
network is still operational and our integrated services strategy can continue
essentially unchanged.

NETWORK DEPLOYMENT AND TRAFFIC MANAGEMENT

     As of March 31, 2000, we were operating in the following local markets:
Austin, Corpus Christi, Dallas, Fort Worth, Houston, San Antonio and Victoria,
Texas; Lafayette and New Orleans, Louisiana; and Phoenix, Arizona.

     The following table sets forth our targeted markets (which generally
include surrounding areas) and our current build out schedule through the end of
2000. The order and timing of network deployment may vary and will depend on a
number of factors, including recruiting management and sales personnel,
negotiations with city management, the regulatory environment, our results of
operations and the existence of specific market opportunities, such as
acquisitions. We may also elect not to deploy networks in each such market.

<TABLE>
<CAPTION>
                                                              ESTIMATED TOTAL    ACTUAL OR ESTIMATED
                                                                  ACCESS         INITIAL FACILITIES
CURRENT MARKETS                                                  LINES(A)       BASED SERVICE DATE(B)
---------------                                               ---------------   ---------------------
<S>                                                           <C>               <C>
Austin, TX..................................................       659,000          1999
Corpus Christi, TX..........................................       231,000          1999
Dallas, TX..................................................     1,912,000          1999
Fort Worth, TX..............................................       949,000          1999
Houston, TX.................................................     2,342,000          1999
San Antonio, TX.............................................       916,000          1999
Victoria, TX................................................        33,000          1999
Lafayette, LA...............................................       208,000          1999
New Orleans, LA.............................................       724,000          1999
Phoenix, AZ.................................................     1,668,000          1999
</TABLE>

                                      S-47
<PAGE>   50

<TABLE>
<CAPTION>
                                                            ESTIMATED TOTAL    ACTUAL OR ESTIMATED
                                                                ACCESS         INITIAL FACILITIES
PLANNED MARKETS                                                LINES(A)       BASED SERVICE DATE(B)
---------------                                             ---------------   ---------------------
<S>                                                         <C>               <C>
Abilene, TX...............................................        73,000      Third Quarter 2000
Alexandria, LA............................................        70,000      Third Quarter 2000
Brownsville, TX...........................................       194,000      Third Quarter 2000
College Station, TX.......................................        79,000      Third Quarter 2000
Denton, TX................................................        50,000      Third Quarter 2000
El Paso, TX...............................................       419,000      Third Quarter 2000
Fort Smith, AR............................................        74,000      Third Quarter 2000
Longview, TX..............................................       124,000      Third Quarter 2000
Lubbock, TX...............................................       137,000      Third Quarter 2000
McAllen, TX...............................................       311,000      Third Quarter 2000
Monroe, LA................................................        81,000      Third Quarter 2000
Muskogee, OK..............................................        11,000      Third Quarter 2000
Nacogdoches, TX...........................................        20,000      Third Quarter 2000
Norman, OK................................................        39,000      Third Quarter 2000
Odessa, TX................................................       146,000      Third Quarter 2000
Oklahoma City, OK.........................................       511,000      Third Quarter 2000
Pine Bluff, AR............................................        31,000      Third Quarter 2000
Rio Grande City, TX.......................................         8,000      Third Quarter 2000
San Angelo, TX............................................        61,000      Third Quarter 2000
Scottsdale, AZ............................................        74,000      Third Quarter 2000
Shreveport, LA............................................       209,000      Third Quarter 2000
Temple, TX................................................        31,000      Third Quarter 2000
Tulsa, OK.................................................       382,000      Third Quarter 2000
Tyler, TX.................................................       101,000      Third Quarter 2000
Waco, TX..................................................       121,000      Third Quarter 2000
Wichita Falls, TX.........................................        82,000      Third Quarter 2000
Amarillo, TX..............................................       124,000      Fourth Quarter 2000
Baton Rouge, LA...........................................       318,000      Fourth Quarter 2000
Beaumont, TX..............................................       224,000      Fourth Quarter 2000
Galveston, TX.............................................       146,000      Fourth Quarter 2000
Harlingen, TX.............................................       194,000      Fourth Quarter 2000
Lake Charles, LA..........................................       100,000      Fourth Quarter 2000
Laredo, TX................................................       112,000      Fourth Quarter 2000
Little Rock, AR...........................................       212,000      Fourth Quarter 2000
Midland, TX...............................................       146,000      Fourth Quarter 2000
Lawton, OK................................................        56,000      Fourth Quarter 2000
Memphis, TN...............................................       586,000      Fourth Quarter 2000
Tucson, AZ................................................       450,000      Fourth Quarter 2000
                                                              ----------
          TOTAL...........................................    15,749,000
                                                              ==========
</TABLE>

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

(a)  Data as of December 31, 1999. Our estimated total access lines are
     illustrative only. This table is not intended to accurately state the total
     access lines in each listed market. Total access lines are estimated by
     multiplying (i) 1998 access line totals for each state (as published by the
     FCC) by (ii) the 1999 population for each city divided by the total
     population of the appropriate state.

(b)  Refers to the first year or quarter during which we commenced offering, or
     expect to commence offering, facilities-based service based on our expanded
     business plan.

                                      S-48
<PAGE>   51

     In some markets, we will not deploy our own switch. Rather, we will deploy
transmission equipment in central offices and route traffic to an existing
switch until traffic growth warrants the addition of a dedicated switch to
service that market. After the initial implementation activities are completed
in a market, we follow an ongoing capacity management plan to ensure that
adequate quantities of network facilities, such as interconnection trunks are in
place, and devise a contingency plan to address spikes in demand caused by
events such as a larger-than-expected customer sales in a relatively small
geographic area.

     Our network operations center located in Dallas monitors and controls our
fiber network 24 hours a day, seven days a week. Our network operations center
in Houston supports our Dallas network operations center, providing back up in
the event of a network failure.

CAPROCK'S COMMUNICATIONS SERVICES

     We provide services to small and medium-sized businesses, communications
carrier customers and high-end, multi-line residential customers. Our business
customers are able to customize their selection of our services to fit their
needs. Integrated services offered to our business customers include local
exchange, domestic and international long distance, enhanced voice, data,
Internet and dedicated private line services. Our principal carrier services
include dark fiber, high bandwidth dedicated fiber infrastructure, terminating
access for domestic and international long distance and ATM, frame relay and IP
data transport services. Systems services primarily represents equipment and
telecommunications services provided to offshore and overseas oil and gas
companies. Systems services include our integrated services products as well as
customer premise equipment.

INTEGRATED SERVICES

     We offer integrated services, including local exchange, domestic and
international long distance, enhanced voice, data, Internet and dedicated
private line services, to our business customers.

     Local Exchange Services. We offer local telephone services, including local
dial tone and enhanced features such as:

     - Call forwarding,

     - Call waiting,

     - Calling number identification and/or calling name identification,

     - Call transfer,

     - Distinctive ringing, and

     - Station-to-station four digit dialing without a private branch exchange.

     By offering local dial tone service, we also receive originating and
terminating access charges for long distance calls placed or received by our
customers. We offer local voice services over unbundled loops as well as high
capacity lines such as T-1 connections. We also combine voice and data over T-1
connections, and soon, over DSL connections.

     Domestic and International Long Distance Services. We offer a broad range
of domestic and international long distance services, which include "1+"
outbound calling, inbound toll free service, as well as calling cards, debit
cards and operator assistance.

     Data Services. Many small and medium-sized businesses do not use data or
high-speed Internet access services today. We believe that these businesses will
increasingly demand these services as e-commerce and other Internet products
develop. At March 31, 2000, we had 12 voice and 15 data switches (which we
expect to expand to 17 data switches by year-end 2000) installed and operational
on our network. This data network supports all of our data, DSL and Internet
services. We also believe that the value of a network is exponential to the
number of sites or customers connected. By concentrating our
                                      S-49
<PAGE>   52

network deployment on the Southwest, we believe we are building an advanced data
network that is very attractive to regional businesses.

     DSL and Other High-Speed Data Services. We offer high-speed Internet access
and data transmission services that support wide area network interconnections.
These services establish communications links that enable file sharing among
geographically distributed computer workgroups. The services may be provided via
ATM, frame relay or dedicated point-to-point connections. To provide these
services, we use leased last mile high capacity connections, such as T-1s and
DS-3s, to reach our customers and connect them to our own long-haul fiber
network or capacity leased from others. We intend to provide DSL services
throughout the Southwest region from our facilities or those of a partner from
200 central offices by year-end 2000.

     FlexT. We recently announced our FlexT bundled services package for
business customers. FlexT combines local exchange, domestic and international
long distance, Internet and high-speed data services via dedicated private
lines, provides efficient cost alternatives to traditional rate plans, and
combines all services on a single invoice.

CARRIER SERVICES

     We intend to establish ourself as the premier carriers' carrier within the
Southwest region, providing voice, data, broadband and dark fiber services over
the most extensive advanced fiber network in the Southwest region. Our principal
carriers' carrier services are domestic and international long distance
terminating access, bandwidth provision, calling cards, debit cards and dark
fiber. We have more than 160 carrier customers, including AT&T, WorldCom, Qwest
and Sprint. For the year ended December 31, 1999, revenues from services
provided to WorldCom and Enron each accounted for more than 10% of our revenues.

     Domestic and International Long Distance Terminating Access. We offer
carrier customers the ability to terminate their long distance calls through our
voice switches. This is provided on a per-call basis, with rates generally based
on a per minute basis. We provide these services for both domestic and
international calls. Most of our carrier international traffic is terminated in
Mexico and in countries where we have established direct connections with
foreign government owned or competitive telephone companies.

     High Capacity Bandwidth. We offer high capacity bandwidth such as T-1,
DS-3, OC-3, OC-12 and OC-48 services to our carrier customers. This service is
generally provided over our own fiber network. Utilizing our DWDM electronics,
we have also begun to market individual wavelengths over our fiber network.
Customers purchasing wavelengths provide their own electronics at each end of
the fiber segment. Wavelengths enable them to adjust capacity as if they owned
their own fiber. Carriers utilize this broadband capacity to support their voice
and data traffic requirements and to establish diverse routing.

     Frame Relay and ATM. We provide end-to-end performance of a customer's
network throughout our region, including the local loop. We are able to extend
this level of performance since we have one of the most highly distributed frame
relay networks in the Southwest region, extending the high-speed data benefits
of frame relay to most Tier I, Tier II and Tier III markets through our region.
Our ATM services are designed for high capacity customers requiring the
flexibility of serving single or multiple locations from one originating
location. These services can be used to facilitate multi-media networking
between high-speed devices such as work stations, super computers, routers and
bridges.

     Dark Fiber. We are building an approximately 7,500 route mile regional
fiber network, which we believe will be, upon completion, one of the region's
most extensive long-haul fiber networks. Much of this network is being built on
routes that are diverse from older existing networks. We are installing, on
average, a minimum of 96 fibers throughout our network with the intent of
retaining at least 24 fibers for our future use. The remaining 72 fibers are
available to sell or swap. The network has been designed with eight major rings
and connects nearly every Tier I, Tier II and Tier III market in our region.

     As our network is completed, dark fiber is being offered for sale to other
carriers. Prices are established on an individual case basis, but generally
reflect the cost of construction and the total quantity
                                      S-50
<PAGE>   53

of fiber being purchased. Our contracts provide for the transfer of title to the
fiber, whereas many other providers retain title. Revenues are recorded at the
time of sale for fiber that is already available, and on a
percentage-of-completion basis for fiber segments that are still under
construction. Additionally, we receive maintenance and collocation revenues
subsequent to the sale of the dark fiber.

SYSTEM SERVICES

     We provide offshore voice and data systems and services to the oil and gas
industry in the Gulf of Mexico. Satellite and microwave transmission media are
used depending on the type and location of the drilling rig involved. Our
communications systems are flexible and can be quickly re-aligned as rigs move
to new locations. We also sell and install telephone and switchboard equipment
to our offshore customers.

SALES AND CUSTOMER SUPPORT

     We offer an integrated package of local exchange, domestic and
international long distance, enhanced voice, data, Internet and dedicated
private line services to small and medium-sized businesses. We believe that
these businesses are seeking simplicity, value and outstanding customer service.
These businesses often lack the resources to have an in-house telecommunications
manager. Consequently, we believe "one-stop shopping" for most communications
services from a single supplier and bundling all services on a single bill
appeals to businesses' desire for simplicity. The bundling of services also
addresses their desire for value when the bundling results in lower costs than
obtaining those same services from multiple vendors. Finally, outstanding
customer service is essential in establishing and maintaining customer
relationships. We believe that our direct sales efforts, bundled services and
customer care programs enable us to better meet the needs of our customers,
rapidly penetrate our target markets, capture a larger portion of our customers'
communications expenditures and enhance customer loyalty.

     Although the vast majority of our sales force is focused primarily on the
small and medium-sized business segment, we also provide services to and receive
a material portion of our revenues from carriers and large business customers.
Therefore, our sales force and customer care organizations are organized to
serve each of these three segments. Sales and marketing approaches in the
telecommunications market are market-segment specific, and we have divided our
sales force into three groups with the following approaches:

     - Small and medium-sized businesses: We use direct sales with sales forces
       based locally in each market;

     - Large businesses, government entities and institutions: We use our
       enterprise sales account teams to respond to the more complex
       requirements of these larger entities; and

     - Wholesale carriers: We use a direct sales force, trade shows, established
       business relationships, competitive pricing and customized back office
       solutions.

     At March 31, 2000, we had 11 sales offices, and we expect to have 18 sales
offices by year-end 2000.

     As of March 31, 2000, our direct sales force consisted of 230 people
(including account executives) supporting our integrated, carrier and systems
services customers. We intend to hire and train approximately 80 additional
account executives by the end of 2000 and an additional 120 account executives
by the end of 2001.

     As of March 31, 2000, we also had 246 independent sales agents located
throughout Texas, Oklahoma, Arizona, New Mexico and New York. Our agent program
was established in 1996, and consists primarily of independent telephone
equipment vendors authorized by us to market our products and services.
Authorized agents receive recurring commissions based on product, pricing,
volume of usage and customer loyalty. We have six agent managers who actively
recruit new independent sales agents.

     In markets where we have already collocated equipment in the central office
of the ILEC and can lease local access as an unbundled network element, we
intend to eventually target high-end, multi-line

                                      S-51
<PAGE>   54

residential customers through telemarketing, direct mail, the web and other
sales channels. We believe these high-end residential customers will contribute
to our network efficiency and overall profitability. We expect to commence these
residential marketing efforts in the fourth quarter of 2000, primarily on an
outsourced basis.

     To support our carriers' carrier and integrated services customers, we
operate a call center in Dallas, Texas staffed by our customer service
representatives, who have completed a certification and training program
provided by us. To enhance their effectiveness, we provide ongoing training to
all customer service representatives. Our customer service department uses
on-line, real-time automated systems that provide notes from all prior contacts
with the customer, provide a complete account and payment history for customers
billed by us and enable the customer service representatives to provision new
services and modify existing services on all of our products.

     Our operations support system was developed by RiverRock Systems, Ltd.
CapRock owns a 49% limited partnership interest in RiverRock and David E.
Thompson, the brother of Jere W. Thompson, Jr., owns a 50% limited partnership
in RiverRock. Thompson Technology, Inc., a Texas corporation ("TTI") that is
owned by David E. Thompson, is the general partner and owns a 1% general
partnership interest in RiverRock. Although it is the intention of RiverRock to
market and sell licenses for the system to third parties, as of the date of this
prospectus supplement, no marketing or sales to third parties have been made.
RiverRock was formed when CapRock and TTI transferred all rights to the system
developed by CapRock and TTI into RiverRock. CapRock has been granted a
royalty-free, perpetual and non-exclusive license for the use of the system.
CapRock also receives upgrades, maintenance and other support from RiverRock for
three years, without the payment of any fees or royalties, which expires in June
2001. Thereafter, CapRock will be required to pay the same fees and royalties
for system upgrades, maintenance and support as other licensees of RiverRock.

COMPETITION

     Overview. The communications services industry is highly competitive,
rapidly evolving and subject to constant technological change. We face a variety
of existing and potential competitors, including:

     - The ILECs in our current target markets,

     - Other voice and data CLECs,

     - Long distance carriers, and

     - Potential market entrants, including cable television companies, shared
       tenant service companies, electric utilities, microwave carriers,
       satellite carriers, wireless telephone system operators and private
       networks built by large end-users.

     We compete primarily on the basis of price, customer service and the
ability to provide a variety of communications products and services.

     We intend to expand our fiber network to approximately 7,500 route miles
throughout the Southwest region by year-end 2001. We expect to compete with
numerous established and start-up national and regional fiber networks owned by
long distance carriers, ILECs and CLECs throughout the Southwest region. These
competitors include very large companies such as: AT&T, WorldCom, Sprint
(WorldCom has entered into an agreement to acquire Sprint), 360networks, Level
3, Williams, SBC, Qwest, TXU, Broadwing and IFN. Many of these companies have
greater name recognition, financial, personnel, technical and marketing
resources than we have. We also anticipate that other providers of local and
long distance telecommunications services will plan and construct fiber networks
that could compete with our network. Competing networks may also have advanced
fiber and operating capabilities similar to those of our network. Furthermore,
we expect that some of our competitors will compete in our geographic market and
directly with us for many of the same customers along a significant portion of
the routes along which we intend to operate.

                                      S-52
<PAGE>   55

     Local Exchange Service. Our business objective is to expand significantly
our operations to provide local exchange services. Regulation permitting us to
compete in the local service market has only recently been enacted into law,
following enactment of the 1996 Telecommunications Act. See "Regulation and
Licenses." Our primary competitor in each of our existing and targeted markets
is the ILEC. Examples include Southwestern Bell, BellSouth and GTE. Other
competitors in the local exchange market include very large long distance
carriers, such as AT&T, WorldCom, and Sprint. The ILECs currently dominate the
provision of local exchange services in their respective markets, and the ILECs
and the very large long distance carriers have greater name recognition and
greater financial, technical, network, marketing and personnel resources than we
do. Those entities also hold longer standing relationships with regulatory
authorities at the federal and state levels than we do.

     In addition to competition from ILECs, we also face competition from a
growing number of other CLECs. Although we believe that CLECs overall have only
captured approximately 5% of the local telecommunications market in our region
(based on published 1998 FCC statistics), we nevertheless compete to some extent
with other CLECs in our customer segments. There are typically several other
CLECs competing in each metropolitan market we serve or plan to enter. Examples
of data and voice CLECs in our markets include Allegiance Telecom, Inc., Covad
Communications Group Inc., NEXTLINK Communications, Inc., NorthPoint
Communications Group Inc., Rhythms NetConnections, Inc., Teligent, Inc. and
Winstar Communications Inc. In some instances, these CLECs have resources
greater than ours and offer a wider range of services. Like us, many of the
CLECs in our markets target small and medium-sized business customers.

     Domestic and International Long Distance. We provide long distance services
using our own facilities and by reselling the facilities of other carriers, both
in the United States and between the United States and other countries. The long
distance communications industry is intensely competitive, and the marketing and
pricing decisions of the larger industry participants such as AT&T, WorldCom,
and Sprint have a significant impact on us. WorldCom has entered into an
agreement to acquire Sprint. Significant consolidation in the industry has
created and will continue to create numerous other entities with substantial
resources to compete for long distance business. Such entities include Global
Crossing Ltd., Broadwing Communications and Qwest. In addition, the FCC has
recently granted approval to one of the RBOCs to provide in-region long distance
service in New York and other RBOCs may be approved to enter the long distance
market in additional states in the future. SBC Communications has filed an
application with the FCC to provide long distance services in Texas. The United
States Department of Justice recently recommended approval of that application.
However, the FCC still must approve the application before SBC can offer long
distance services in Texas. GTE does not require FCC approval and may enter the
long distance market now. These larger competitors have significantly greater
name recognition and greater personnel, financial, technical, network and
marketing resources. Many may also offer a broader portfolio of services and
have long standing relationships with the customers we target. Moreover, we
cannot guarantee that our competitors cannot negotiate contracts with suppliers
of telecommunications services to obtain conditions of service more favorable
than ours. Many of our competitors enjoy economies of scale that can result in a
lower cost structure for transmission and related terminating costs. Those
carriers could bring significant pricing pressure to bear on us.

     Customers frequently change long distance providers in response to lower
rates or promotional incentives by competitors. Prices for domestic and
international long distance calls have declined in recent years and we expect
them to continue to decrease further and more rapidly. Indeed, we expect
competition in all of our relevant markets to increase. This increased
competition could adversely affect our net revenue per minute and gross margins.
We cannot guarantee that we can compete effectively in the domestic or
international long distance markets.

EMPLOYEES

     As of March 31, 2000, we employed 850 people, including 272 in sales and
marketing, 241 in engineering and technical services, 155 in provisioning and
customer care and 182 in management, administration and finance. At that date,
we also had an agent sales force numbering 246 independent
                                      S-53
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sales agents throughout Texas, Oklahoma, Arizona, New Mexico and New York. We
use the services of independent contractors for construction of our fiber
network. None of our employees is represented by a labor union or is subject to
a collective bargaining agreement. We believe that we have good relations with
our employees.

PROPERTIES

     We own or lease buildings that contain approximately 375,000 square feet of
floor space. Our primary headquarters are located in Dallas, Texas. We own an
office building in Friendswood, Texas and an office building in Lafayette,
Louisiana, and we lease the remainder of our office space.

     All of the fiber, telecommunications equipment and other properties and
equipment used in our networks are owned or leased by us. We have entered into
various franchise, rights of way and lease agreements for network regeneration
sites. These properties and agreements do not lend themselves to description by
character and location of principal units and are not considered meaningful for
this disclosure. Our principal facilities include:

<TABLE>
<CAPTION>
                                         APPROXIMATE
LOCATION                                 SQUARE FEET                 DESCRIPTION
--------                                 -----------                 -----------
<S>                                      <C>           <C>
Dallas, Texas..........................    215,000     Corporate headquarters for
                                                       administration, finance and carrier
                                                       sales functions, network operations
                                                       center, sales, switching and customer
                                                       support personnel
Friendswood, Texas.....................     30,000     Engineering, network operations center,
                                                       administration, production and
                                                       warehouse
Houston, Texas.........................     24,000     Division headquarters for
                                                       administration, finance and sales
                                                       functions
Phoenix, Arizona.......................     10,000     Switching facility and sales functions
</TABLE>

We consider our facilities adequate for our current needs and believe that
suitable additional space will be available, as needed, to accommodate further
physical expansion of corporate operations and for additional sales and service.

LEGAL PROCEEDINGS

     We are a party to ordinary litigation incidental to our business from time
to time. Currently, we are not a party to any litigation that we expect would
have a material adverse effect on our business, financial condition, results of
operations and cash flow.

                                      S-54
<PAGE>   57

                            REGULATION AND LICENSES

     The following summary of regulatory developments and legislation does not
purport to describe all present and proposed federal, state and local
regulations and legislation affecting the communications industry. Other
existing federal, state and local legislation and regulations are currently the
subject of judicial proceedings, legislative hearings, and administrative
proposals which could change, in varying degrees, the manner in which this
industry operates. Neither the outcome of these proceedings, nor their impact
upon us or the communications industry, can be predicted at this time. This
section also sets forth a brief description of regulatory and tariff issues
pertaining to our operations.

     We provide domestic and international services subject to varying degrees
of U.S. federal, state and local regulation, and regulation by foreign
authorities. In the United States, the Communications Act of 1934 (the "1934
Communications Act"), as amended, including the regulations promulgated by the
FCC thereunder, as well as the applicable laws and regulations of the various
states and state regulatory commissions all govern the provision of
telecommunications services. The FCC exercises jurisdiction under Title II of
the 1934 Communications Act over all facilities of, and services offered by,
telecommunications common carriers to the extent such services involve
jurisdictionally interstate common carrier communications, including
international communications originating from or terminating in the United
States. State regulatory authorities retain jurisdiction over jurisdictionally
intrastate communications. Under Title III of the 1934 Communications Act, the
FCC also regulates the licensing and use of the radio frequency spectrum. Local
governments sometimes impose franchise or licensing requirements on local
service competitors and/or facilities companies. Services we provide in other
countries remain subject to the telecommunications laws and regulations of those
countries.

     The FCC and the state regulatory agencies impose and enforce regulatory
requirements applicable to our operations. The FCC and the state regulatory
agencies may address regulatory non-compliance with a variety of enforcement
mechanisms, including:

     - monetary forfeitures,

     - refund orders,

     - injunctive relief,

     - license conditions, and/or

     - license revocation.

     As a telecommunications carrier, we must also comply with the Federal
digital wiretapping administered by the U.S. Department of Justice and the FCC.
Telecommunications industry regulation varies substantially from state to state
and continues to change rapidly. Moreover, as deregulation at the federal level
occurs, some states are reassessing the level and scope of regulation applicable
to carriers. Domestic or international regulators or third parties could raise
material issues with regard to our compliance or non-compliance with applicable
regulations. Future regulatory, judicial or legislative activities could have a
material adverse effect on our business, financial condition, results of
operations and cash flow.

U.S. FEDERAL REGULATION

     Local Service Regulation Under The 1996 Telecommunications Act. The 1996
Telecommunications Act, which amended the 1934 Communications Act, provided for
comprehensive reform of the United States' telecommunications laws. In passing
the 1996 Telecommunications Act, Congress sought to increase local competition
from newer competitors such as long distance carriers, cable TV companies and

                                      S-55
<PAGE>   58

public utility companies. The 1996 Telecommunications Act specifically requires
all LECs (including ILECs and CLECs):

     - not to prohibit or unduly restrict resale of their services,

     - to provide dialing parity, number portability and nondiscriminatory
       access to telephone numbers, operator services, directory assistance and
       directory listings,

     - to afford access to poles, ducts, conduits and rights of way, and

     - to establish reciprocal compensation arrangements for the transport and
       termination of telecommunications.

     In addition, ILECs must provide:

     - interconnection on certain terms and conditions,

     - unbundled network elements,

     - resold local services at wholesale rates,

     - reasonable public notice of any changes in the information needed for
       transmission and routing services over their communications facilities,
       and

     - physical collocation of equipment necessary for interconnection and
       access to unbundled network elements at the LECs' premises.

     On March 31, 1999, the FCC released its Collocation Order that requires
ILECs to permit CLECs to collocate any equipment used for interconnection or
access to unbundled network elements even if that equipment includes switching
or enhanced service functions. Among other things, the Collocation Order also:

     - prohibits ILECs from placing any limits on the use of switching or
       enhanced features for permissible collocated equipment; and

     - requires ILECs to make cageless collocation available and permit CLECs to
       construct their own cross-connect facilities.

     On March 17, 2000, the United States Court of Appeals for the District of
Columbia Circuit vacated limited portions of the Collocation Order, holding
certain definitions contained in the FCC's rules are impermissibly broad. The
court remanded the Collocation Order in part for further FCC consideration of
these issues. The FCC will be instituting proceedings to comply with the Court's
remand. In the interim, the FCC has obtained written commitments from the RBOCs
and GTE regarding their collocation practices. The FCC hopes these commitments
will facilitate the continuing development of competition in local markets and
provide some measure of certainty to parties seeking collocation from ILECs.

     Under the 1996 Telecommunications Act, RBOCs have the opportunity to
provide out-of-region long distance and certain cable TV services immediately
and in-region long distance services after the RBOCs meet certain conditions.
Specifically, an RBOC can enter the market for in-region long distance services
within areas where the RBOC provides local exchange service upon FCC approval
based on a showing that facilities-based competition and interconnection
agreements meeting a 14-point checklist both exist. On December 22, 1999, the
FCC granted Bell Atlantic's application to offer in-region long distance
services in New York, marking the first time since the breakup of AT&T that an
RBOC is able to provide its customers with both local and long distance service.
Entry of RBOCs into the domestic and international long distance business and
the emergence of other new local competitors could subject us to substantial
competition and could have a material adverse effect on our business, financial
condition and results of operations.

                                      S-56
<PAGE>   59

     AT&T and Covad Communications have asked the United States Court of Appeals
for the District of Columbia Circuit to overturn the FCC decision on the grounds
that Bell Atlantic has not, in fact, sufficiently opened the local phone market
to rivals. While the case is pending, Bell Atlantic will continue to offer long
distance services in New York. SBC Communications has filed an application with
the FCC to provide long distance services in Texas. That application is still
pending. The United States Department of Justice recently recommended approval
of that application. However, the FCC still must approve the application before
SBC can offer long distance services in Texas. Other RBOCs are expected to file
similar applications seeking in-region long distance authority in other states.
If the FCC approves these applications, the competition we face in the states in
which we operate or plan to operate will also increase.

     On August 8, 1996, the FCC released the Interconnection Decision, which
established a framework of minimum, national rules enabling state commissions
and the FCC to begin implementing many of the local competition provisions of
the 1996 Telecommunications Act. Among other things, the Interconnection
Decision:

     - prescribed certain minimum points of interconnection,

     - adopted a minimum list of unbundled network elements that ILECs must make
       available to competitors, and

     - adopted a methodology for states to use when setting prices for unbundled
       network elements and for wholesale resale services.

     On January 25, 1999, the Supreme Court issued an opinion overturning prior
decisions issued by the U.S. Court of Appeals for the Eighth Circuit that had
vacated certain portions of the Interconnection Decision. The Supreme Court's
decision confirmed the FCC's authority to issue regulations implementing the
pricing and other provisions of the 1996 Telecommunications Act and reinstated
most of the challenged rules. However, the Supreme Court vacated a key FCC rule
that identified the network elements that ILECs must unbundle. The FCC has since
adopted a new standard for analyzing unbundled network elements, as required by
the Supreme Court. Applying this standard to the existing network elements, the
FCC concluded that ILECs would no longer be required to provide directory
assistance and operator services as network elements, though they will continue
to be available pursuant to tariffed rates. The FCC also removed unbundled
switching as an element in the top 50 metropolitan statistical areas where the
ILECs are also providing certain other combinations of elements in a
nondiscriminatory fashion. The FCC declined, however, except in limited
circumstances, to require ILECs to unbundle certain facilities used to provide
high-speed Internet access and other data services.

     The Eighth Circuit decisions and their reversal by the Supreme Court
perpetuate continuing uncertainty about the rules governing the pricing, terms
and conditions of interconnection agreements. During the pendency of the Eighth
Circuit proceedings, state public utilities commissions have continued to
conduct arbitrations, and to implement and enforce interconnection agreements.
However, the Supreme Court's ruling and further proceedings on remand may affect
the scope of the state commissions' authority to conduct such proceedings or to
implement or enforce interconnection agreements. The U.S. Supreme Court's
decision has resulted in new and additional rules being promulgated by the FCC.
Given the general uncertainty surrounding the effect of the Eighth Circuit
decisions, the decision of the Supreme Court reversing them, and subsequent
proceedings, we cannot guarantee that we can continue to obtain or enforce
acceptable interconnection terms or interconnection terms consistent with our
business plans.

     On August 7, 1998, the FCC released an Order denying requests by various
ILECs that the FCC use Section 706 of the 1996 Telecommunications Act to forbear
from regulating advanced telecommunications services. Instead, the FCC
determined that advanced services constitute telecommunications services and
that ILECs must comply with the unbundling and resale obligations and the
in-region inter-LATA restrictions of the 1996 Telecommunications Act in their
provision of advanced services. The FCC also proposed in a rulemaking to allow
ILECs to provide advanced services on an unregulated basis through separate
subsidiaries. We cannot predict the outcome of the FCC's proceeding. However, if
the FCC does
                                      S-57
<PAGE>   60

forbear from regulating advanced telecommunications services, such a decision
would increase the ability of ILECs to compete against less established carriers
such as us.

     Domestic Interstate Services. The FCC considers domestic interstate common
carriers (including us) that do not have market power as "nondominant." The FCC
subjects nondominant carriers to minimal regulation. However, interstate
carriers offering services to the public must comply with the federal statutory
and regulatory requirements of common carriage under the 1934 Communications Act
and file various reports and pay various fees and assessments. Among other
things, interstate common carriers must offer service on a non-discriminatory
basis at just and reasonable rates. Nondominant carriers need not obtain
specific prior FCC approval to initiate or expand domestic interstate services,
although they must file a tariff with the FCC. Nondominant carriers remain
subject to the FCC's complaint jurisdiction. In particular, we may be subject to
complaint proceedings in conjunction with alleged noncompliance such as
unauthorized changes in a customer's preferred carrier. In the event that the
FCC finds that we have violated an applicable rule or regulation, due to a
complaint, noncompliance with a fee payment or other reporting requirement or an
internal investigation, the FCC retains broad authority to impose various
sanctions or penalties. The FCC has issued an order eliminating the requirement
that nondominant carriers maintain tariffs for their domestic interstate
services on file at the FCC. Several carriers appealed the FCC's order to the
U.S. Court of Appeals for the District of Columbia and that court stayed the
FCC's order pending resolution of the appeal. On April 28, 2000, the D.C.
Circuit affirmed the FCC's order and, at this time, we cannot predict whether
further appeals will be pursued. The FCC order became effective on May 1, 2000.
Therefore, nondominant interexchange carriers will need to find new means of
providing notice to customers of prices, terms and conditions on which they
offer their interstate services. On May 9, 2000, the FCC implemented a
nine-month transition period (ending January 31, 2001) for carriers, and is
seeking comment on various issues relating to detariffing. By the end of the
transition period, carriers must cancel their domestic, interstate tariff
offerings that are covered by the FCC's detariffing order. The FCC had released
an earlier order specifying how carriers should inform customers of their rates
if detariffing occurs. Rate information is to be provided to customers by such
means as posting the rates on a carrier's World Wide Web site. Elimination of
tariffs will require that we secure with each of our customers contractual
agreements containing the terms of the services offered. To the extent that
disputes arise over such contracts, carriers, including us, may no longer resort
to the legal doctrine that the terms of a filed tariff supersede individual
contract language.

     International Service Regulation. As a provider of international
telecommunications services, we must comply with the federal statutory and
regulatory requirements of common carriage under the 1934 Communications Act.
International common carriers must obtain authority from the FCC under Section
214 of the 1934 Communications Act and file a tariff containing the rates,
terms, and conditions applicable to their services before initiating their
international telecommunications services. We hold global authority from the FCC
to provide resale of switched services and private line services (where
permitted by the FCC) and to provide facilities-based services. We maintain an
international tariff on file with the FCC. International telecommunications
service providers must also file with the FCC:

     - copies of their contracts with other carriers,

     - certain foreign carrier agreements, and

     - various reports regarding their international revenue, traffic flows and
       use of international facilities.

     Carriers holding Section 214 authority must also comply with FCC rules
requiring, among other things, prior approval for most transfers of control and
assignments.

     Authorized international carriers must also comply with the FCC's
international service regulations, including the International Settlements
Policy ("ISPY") which governs:

     - the payment settlements between U.S. common carriers and their foreign
       correspondents for terminating traffic over each other's networks,

     - the accounting rates for such settlements, and
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<PAGE>   61

     - the permissible deviations from these policies.

     The ISPY applies to both resale and facilities-based operations. To the
extent that we acquire or own facilities that permit us to carry international
traffic, the FCC may pay particular attention to our compliance with that
policy.

     The FCC also recently approved significant reform of its ISPY, and
deregulated intercarrier settlement arrangements between U.S. carriers and
non-dominant foreign carriers and arrangements with all foreign carriers on
competitive routes. Specifically, the new FCC rules generally eliminated the
ISPY and contract filing requirements for arrangements with foreign carriers
that lack market power. The recent ISPY reform also changed the FCC's private
line resale (or international simple resale ("ISR")) policy, which prohibits
carriers from using private line circuits to provide switched services to a
foreign country unless the FCC has approved that foreign route for ISR service.
The FCC will approve a foreign route for ISR if it finds that the country offers
equivalent resale opportunities to engage in similar activities in that country
or, with WTO countries, if the local telecommunications provider charges U.S.
carriers rates at or below the FCC-determined rate for terminating U.S. traffic
(the "Benchmark Rate"). The new ISPY reform effectively permits ISR arrangements
with nondominant foreign carriers. Where U.S. carriers enter into agreements
with dominant foreign carriers, ISR will continue to be permitted on those
foreign routes approved by the FCC. The ISPY reform will open new opportunities
for U.S. carriers to enter into innovative, economic traffic arrangements with
foreign carriers, but will also likely increase competition in the international
services market.

     The FCC also streamlined Section 214 license and related requirements.
While these rule changes may provide carriers with more flexibility to respond
more rapidly to changes in the global telecommunications market, they will also
likely increase the level of competition in the international telecommunications
marketplace.

     Wireless Services. We own and maintain a variety of telecommunications
infrastructures and we hold various FCC and international licenses to transmit
voice and data. We currently hold numerous FCC licenses to provide land mobile,
microwave and satellite communications services. See "-- Licenses."

     FCC licensees authorized to provide microwave, satellite earth station and
land mobile service must comply with requirements under Title III of the 1934
Communications Act and a variety of detailed licensing, operational and
technical requirements specific to each service. Among other requirements,
licensees seeking to alter the technical or operational configurations of their
equipment or to continue operating beyond the expiration date of the licenses
must seek additional prior authority from the FCC. FCC rules also contain
various other requirements such as restrictions on proposed transfers of control
or assignments and required compliance with relevant Federal Aviation
Administration rules on wireless tower construction and operation. The FCC
generally retains the right to sanction a carrier or revoke its authorizations
if a carrier violates applicable laws or regulations.

     The FCC continues to refine its wireless rules for each service area to
accommodate advances in technology, developing markets and new service
arrangements, to implement certain provisions of the 1996 Telecommunications
Act, and to eliminate confusing, outdated, redundant or otherwise burdensome
regulation. Opportunities to obtain new common carrier wireless licenses are
often limited by the FCC's auction process under which the FCC assigns wireless
licenses to the highest bidder.

     The 1934 Communications Act generally limits direct foreign ownership of
wireless licenses to 20%, but provides for indirect foreign ownership holdings
above 25% upon FCC approval. In its order implementing the U.S. commitment under
the WTO Agreement, the FCC established new rules that effectively relax the
foreign ownership limits for common carrier wireless licenses. Specifically, the
new rules allow for up to 100% indirect ownership of wireless licenses by
foreign interests from countries that are members of the WTO upon FCC review and
approval from countries that have participated in the WTO Agreement.

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<PAGE>   62

     Access Charges. The cost of providing long distance and local exchange
services will be affected by changes in the "access charge" rates imposed by
ILECs on long distance carriers for origination and termination of calls over
local facilities. The term "access service" describes the use of local exchange
facilities for the origination and termination of interexchange communications.
On May 16, 1997, the FCC released an order intended to reform the FCC's system
of interstate access charges to make that regime compatible with the
pro-competitive deregulatory framework of the 1996 Telecommunications Act. The
FCC's access reform order adopts various changes to federal policies governing
interstate access service pricing designed to move access charges, over time, to
more economically efficient levels and rate structures. Among other things, the
FCC:

     - modified rate structures for certain non-traffic sensitive access rate
       elements, moving some costs from a per-minute-of-use basis to flat-rate
       recovery, including one new flat rate element,

     - changed its structure for interstate transport services, and

     - affirmed interstate access charges do not apply to ISPs.

     On August 18, 1998, the Eighth Circuit affirmed the FCC's access reform
order.

     On April 5, 1999, U S West filed a petition with the FCC asking the FCC to
find that IP telephony services are telecommunications services, not enhanced
services or information services, and therefore should be subject to access
charge and universal service obligations. We cannot predict how the FCC will
rule on U S West's petition. If the FCC does ultimately determine that IP
telephony is subject to the FCC's access charge and universal service regimes,
such a ruling would likely substantially increase the costs of providing IP
telephony. U S West filed similar requests before the Nebraska Public Service
Commission and the Colorado Public Utility Commission, however neither of these
commissions reached decision on these issues.

     In response to claims that existing access charge levels are excessive, the
FCC stated that it would rely on market forces first to drive prices for
interstate access to competitive levels but that a "prescriptive" approach might
be considered if necessary. On May 31, 2000, the FCC adopted an order intended
to significantly reduce access charges paid by long distance companies. On
August 5, 1999, the FCC adopted an order granting ILECs additional pricing
flexibility, implementing certain access charge reforms, and seeking comments on
others. The order provides a framework of "triggers" to provide those companies
with greater pricing flexibility to set interstate access rates as competition
increases. The order also initiated a rulemaking to determine whether the FCC
should regulate the access charges of CLECs. If this increased pricing
flexibility for price cap ILECs is not effectively monitored, or if the FCC
regulates CLEC access charges, it could have a material adverse impact on our
ability to price our own interstate access services competitively.

     Some long distance carriers, including AT&T and Sprint, have challenged the
switched access rates of CLECs and have withheld some or all payments for the
switched access services that they continue to receive. Those long distance
carriers have challenged CLEC switched access charges arguing that they are
higher than those of the ILEC serving the same territory and are therefore
unjust and unreasonable. In a specific complaint case brought by a long distance
carrier, the FCC recently confirmed the obligation of a long distance carrier to
pay a CLEC's tariffed rates for originating access that it received. In
contrast, several states have proposed or required that CLEC access charges be
limited to those charged by ILECs operating in the same area as the CLEC with
respect to calls originating or terminating in such area, except where the CLEC
in question can establish that its costs justify a higher access rate through a
formal cost proceeding. The FCC and state commissions are currently considering
the switched access rate level issue. Our switched access rates will have to be
adjusted to comport with future decisions of the FCC and state commissions and
these adjustments could have a material adverse effect on our business,
financial condition, results of operations and cash flow.

     Line Sharing. On November 18, 1999, the FCC adopted a new order requiring
ILECs to provide line sharing, which will allow CLECs to offer data services
over the same line the consumer uses for voice

                                      S-60
<PAGE>   63

services without the CLECs being required to offer the voice services. State
commissions have been authorized to establish the prices to the CLECs for such
services. The decision has been appealed.

     Universal Service Charges. In 1997, the FCC released an order establishing
a significantly expanded federal universal service subsidy regime. Specifically,
the FCC established new universal service funds to support telecommunications
and information services provided to qualifying schools, libraries and rural
health care providers, and expanded the federal subsidies for local telephone
services provided to low-income consumers. The FCC collects money to fund this
expanded regime from interstate carriers and certain other entities. Our
payments for the schools and libraries and rural health care fund depend on
estimated quarterly intrastate, interstate and international gross end-user
telecommunications revenues. Contribution factors vary quarterly and the FCC
bills carriers on a monthly basis. Contribution factors for the second quarter
of 2000 are 5.7101%. Because the contribution factors do vary quarterly, we
cannot currently accurately determine the annualized impact on our annual
performance. Several parties have appealed the FCC's universal service order.
The United States Court of Appeals for the Fifth Circuit upheld the order in
most respects, but has rejected the FCC's effort to base contributions in part
on intrastate revenues. The FCC's universal service program may also be altered
as a result of the agency's reconsideration of its policies, or by future
Congressional action.

     The FCC may also issue new regulations governing the treatment of calls to
ISPs for the purposes of universal service obligations. In a recent report to
Congress, the FCC clarified that carriers must consider revenues earned from the
transmission services supplied to ISPs when calculating universal service
obligations. The FCC plans to address in the future the contribution
obligations, if any, of ISPs using their own facilities and ISPs providing
phone-to-phone IP telephony. We cannot predict the outcome of these proceedings
or their potential effect on our operations.

     Internet Services. There are currently few U.S. laws or regulations that
specifically regulate communications or commerce over the Internet. One area in
which Congress did attempt to regulate information over the Internet involved
the dissemination of obscene or indecent materials. The constitutionality of
those provisions have been debated in litigation ongoing today and has been
subject to further litigation. It is possible that in the future laws and
regulations could be adopted which address matters such as user privacy,
copyrights, pricing and the characteristics and quality of Internet services,
among other areas. Internet-related legislation and regulatory policies are
continuing to develop and we could be subject to increased regulation in the
future. Laws or regulations could be adopted in the future or existing laws and
regulations could be applied to the Internet that may decrease the growth and
expansion of the Internet's use, increase our cost of doing business, or
otherwise adversely affect our business.

     Laws have also been adopted relating to Internet user privacy. In the
United States, the Children's Online Privacy Protection Act applies to the
online collection of personal information from children under the age of 13. The
Federal Trade Commission has issued rules under that Act, and may impose
penalties for non-compliance with the Act and the rules.

     In addition, in 1998 Congress passed the Digital Millennium Copyright Act.
That act provides ISPs that comply with its requirements numerous protections
from certain types of copyright liability. To the extent that we have not met
those requirements, third parties could seek recovery from us for copyright
infringements caused by our Internet customers.

     The law relating to the liability of ISPs for information carried on or
disseminated through their networks is currently unsettled. It is possible that
claims could be made against ISPs for defamation, negligence, copyright or
trademark infringement, or on other theories based on the nature and content of
the materials disseminated through their networks. We could be required to
implement measures to reduce our exposure to potential liability, which may
require, for instance, the expenditure of resources or the discontinuance or
modification of certain product or service offerings. Costs that may be incurred
as a result of contesting any claims relating to our services or the consequent
imposition of liability could have a material adverse effect on our business,
financial condition, results of operations and cash flow.

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     The Eighth Circuit found that the FCC has a reasonable basis for not
requiring ISPs to pay access charges. In June 1997, every RBOC advised CLECs
that they did not consider calls in the same local calling area from RBOC served
customers to CLEC served ISPs, to be local calls under the interconnection
agreements between the RBOCs and the CLECs. The RBOCs also claimed that the FCC
exempted these calls from access charges, and therefore that CLECs could not
recover compensation for transporting and terminating such calls. As a result,
the RBOCs threatened to withhold, and in many cases did withhold, reciprocal
compensation for the transport and termination of such calls. To date, numerous
state commissions have ruled on this issue in the context of state commission
arbitration proceedings or enforcement proceedings. Of the over 30 state
commissions that have considered this issue, almost all have held that RBOCs
must pay reciprocal compensation for such calls. Various entities have appealed
these decisions. We cannot predict the outcome of pending or future appeals.

     On February 26, 1999, the FCC determined that calls made to ISPs are
largely interstate in nature, and requested comments regarding how this traffic
should be regulated once existing interconnection agreements expire. However,
the FCC also determined that since federal law did not govern compensation for
this traffic when existing interconnection agreements were signed, the states
could determine whether carriers should pay reciprocal compensation for these
calls under existing agreements. There is a risk that state commissions which
previously considered this issue and ordered the payment of reciprocal
compensation could revisit this issue on their own volition or at the request of
an ILEC, and revise their prior decisions on this issue. Of the several Federal
District Courts and three Courts of Appeal that have reviewed this issue on the
merits to date, all have upheld state decisions requiring that reciprocal
compensation be paid for ISP-bound traffic.

     On March 24, 2000, the U.S. Court of Appeals for the District of Columbia
Circuit vacated the FCC's February 26, 1999 ruling that Internet-bound calls are
jurisdictionally interstate and therefore not local calls for which reciprocal
compensation is owed. The Court remanded the proceeding to the FCC for a further
review of the nature of these calls for purposes of reciprocal compensation. We
cannot predict the impact of the Court's ruling on pending or future proceedings
at this time.

STATE REGULATION

     Most states require carriers to obtain a certification or other
authorization before offering local exchange and long distance intrastate
services. These certifications generally require a showing that the carrier has
adequate financial, managerial and technical resources to offer the proposed
services in a manner consistent with the public interest. We hold long distance
authorization in most, but not all, of the states in which certificates are
required. In addition most states impose tariff requirements on carriers and
require that common carriers charge just and reasonable rates and not
discriminate among similarly situated customers. Some states also require the
filing of periodic reports, the payment of various regulatory fees and
surcharges, and compliance with service standards and consumer protection rules.
States often require prior approvals or notifications for certain transfers of
assets (such as fiber cable or other telecommunications facilities), customers,
or ownership. Some states also require approval or notice for the issuance of
securities or debt or for name changes. We have sought or expect to seek various
additional authority in some states. We cannot guarantee that we will be able to
successfully obtain such approvals. States generally retain the right to
sanction a carrier or to revoke certifications if a carrier violates relevant
laws and/or regulations. If any state regulatory agency concluded that we
provide intrastate service without the appropriate authority, or that we are not
otherwise in compliance with state public utility commission rules, that agency
could initiate enforcement actions, potentially including the imposition of
fines, the disgorging of revenues, or the refusal to grant the regulatory
authority necessary for the future provision of intrastate telecommunications
services. We hold authority to provide long distance and competitive local
exchange services in certain states including Arizona, Arkansas, Kansas,
Louisiana, Oklahoma and Texas, and have authority to provide interexchange
service in at least 43 states.

     In addition, carriers providing intrastate services must comply with state
utility commission rules and policies with respect to ILEC and CLEC competition,
geographic build out, mandatory de-tariffing and other matters. Certain states
have adopted specific universal service funding obligations. Numerous other
                                      S-62
<PAGE>   65

states have also instituted proceedings to adopt state universal service funding
obligations rules. State commissions generally have authority to impose
sanctions on carriers ranging from fines to license revocation to address
non-compliance with the states' particular regulatory policies and requirements.

     State regulatory agencies also regulate access charges and other pricing
for telecommunications services within each state. The RBOCs and other LECs have
sought reductions in state regulatory requirements, including greater pricing
flexibility. If regulators allow variable pricing of access charges based on
volume, we could face a competitive disadvantage in competing against larger
long distance carriers. We also could face increased price competition from the
RBOCs and other LECs for local and long distance services. In addition, the
removal of former restrictions on long distance service offerings by the RBOCs
as a result of the 1996 Telecommunications Act could further increase
competition. We cannot predict what impact of such rule changes might have on
our operations.

LOCAL GOVERNMENT AUTHORIZATIONS

     We also own telecommunications facilities that may be subject to certain
local government requirements. In particular, facilities-based companies must
generally obtain street use and construction permits and licenses and/or
franchises to install and expand fiber networks using municipal rights of way.
While regulation of municipal rights of way generally remains a matter under
local jurisdiction, some states have enacted or are considering enacting
measures that affect the ability of local governments to impose certain types of
restrictions on franchisees or to require certain types of concessions from
carriers seeking franchise agreements.

     Termination of our existing franchise or license agreements before their
expiration dates or failure to renew those agreements and any resulting
requirement to remove facilities could have a material adverse effect on our
business, financial condition, results of operations and cash flow. In some
municipalities carriers must pay license or franchise fees based on a percentage
of gross revenues or on a per linear foot basis, as well as post performance
bonds or letters of credit. We cannot guarantee that we can retain existing
franchises or that franchise fees will remain at their current levels.

FOREIGN REGULATION

     International telecommunications providers are subject to varying degrees
of regulation in each of the jurisdictions in which they provide service. Local
laws and regulations, and the interpretation of such laws and regulations,
differ significantly from country to country. To the extent that we provide, now
or in the future, services in non-U.S. countries, we must comply with the laws
and regulations of foreign countries. The nature and extent of
telecommunications regulation varies significantly from country to country and
may include requirements that reflect closed or limited market access. We may
also face burdensome requirements to obtain initial licensing and encounter
operational and rate requirements in the relevant countries. For example, many
countries, including Mexico, have international settlements policies similar to
the one imposed by the U.S. Such policies and their enforcement vary between
different countries. To the extent that we provide service between the U.S. and
other countries, various international settlement policies may apply.

LICENSES

     We have received authorization, by virtue of state certification, tariff,
registration, or on a deregulated basis, to provide resold long distance
services in at least 43 states. In order to provide wireless mobile services, we
own various radio systems that provide two-way voice communications and have
obtained approximately 35 FCC licenses with approximately 300 frequency pairs.
These licenses have varying terms that expire and will require renewal. As each
license comes due for renewal, we will evaluate the need for such license and
elect to either renew the license or let it expire where, for example, we expect
no further need to use a particular license. These FCC wireless licenses allow
us to provide two-way wireless radio services along the Texas and Louisiana Gulf
Coast and offshore to oil and gas-related companies. Each frequency pair allows
two-way transmission and reception. We hold approximately 20 microwave FCC

                                      S-63
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licenses providing voice and data services along the Texas and Louisiana Gulf
Coast and offshore to drilling, production and related companies. We hold four C
band fixed earth station authorizations and special temporary authority for
another C band temporary-fixed earth station. We also hold seven authorizations
that permit us to own and operate a network of Very Small Aperture Terminal
("VSAT") networks that operate in the Ku band.

     We also operate as an FCC certificated Section 214 carrier to provide
resold switched telecommunications services. We have obtained common carrier
authority from the FCC to provide global resale of switched and private line
services as well as global facilities.

     We currently provide international facilities-based private line service on
a private carrier basis into Bolivia, Bosnia, Croatia, Ecuador, Hungary and
Russia. As part of our plans to increase service offerings, we have obtained
authority to provide competitive local exchange services and long distance
services in Arizona, Arkansas, Kansas, Louisiana, Oklahoma and Texas. In
addition, we have received approval to have pole attachment rights to existing
or future facilities of Entergy, BellSouth and the State of Louisiana. Pole
attachment rights allow us to attach our own fiber cable to other parties'
respective utility poles. In addition, we own installed fiber cable placed under
various public and private rights of way.

DIGITAL WIRETAPPING

     The Communications Assistance to Law Enforcement Act ("CALEA"), enacted in
1994, requires telecommunications carriers to make available certain
telecommunications capabilities to U.S. law enforcement officials to permit
those authorities to continue to intercept communications involving advanced
technologies such as digital and wireless transmission communications. CALEA
imposes certain obligations on carriers to ensure that their equipment,
facilities and services will meet capability and capacity requirements in order
to provide law enforcement agencies the ability to intercept wireline and
wireless communications transmitted over those carrier's networks. Courts may
impose fines of up to $10,000 per day on telecommunications carriers that fail
to meet the required capability functions, as determined by industry standards.
Under procedures specified in CALEA, the U.S. Department of Justice ("DOJ")
recently filed a petition at the FCC challenging the technical capability
standard developed by the telecommunications industry. Because of the disputed
standard, several carriers sought an FCC extension of the October 25, 1998
capability compliance deadline. The FCC recently extended the compliance date
for the CALEA capability requirements to June 30, 2000 to permit manufacturers
sufficient time to develop CALEA compliant equipment. Carriers have also been
permitted to file petitions for extension of the CALEA capability requirements.
In the meantime, we expect the FCC to issue shortly an order identifying the
capabilities carriers, such as us, will have to provide to law enforcement
officials in order to meet CALEA's requirements. Telecommunications carriers
must also meet CALEA capacity requirement mandating that by March 12, 2001,
carriers enable a specific number of simultaneous interceptions determined on a
geographic basis. We cannot predict the nature and extent of the impact the
CALEA requirements will have on us or on telecommunications carriers in general.

                                      S-64
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                                   MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

     Our directors and executive officers, and their respective ages, as of the
date of this prospectus supplement are as follows:

<TABLE>
<CAPTION>
NAME                                   AGE                     POSITION(S)
----                                   ---                     -----------
<S>                                    <C>    <C>
Jere W. Thompson, Jr. ...............  43     Chairman of the Board, Chief Executive Officer
                                              and Director
Leo J. Cyr...........................  44     President, Chief Operating Officer and
                                              Director
Kevin W. McAleer.....................  49     Senior Vice President, Chief Financial
                                              Officer, Treasurer and Secretary
T. George Hess.......................  55     Senior Vice President of Network Services
Claude A. Robertson..................  37     Senior Vice President of Carrier Sales
Kenneth L. Monblatt..................  34     Senior Vice President, Chief Information
                                              Officer
Matthew M. Kingsley..................  35     Corporate Controller
Timothy W. Rogers....................  37     Director
Mark Langdale........................  46     Director
Christopher J. Amenson...............  50     Director
John R. Harris.......................  51     Director
</TABLE>

     Jere W. Thompson, Jr. has served as Chairman of the Board and Chief
Executive Officer of CapRock since its formation in February 1998. Mr. Thompson
also has served as President of CapRock Telecommunications, one of our
predecessor companies, since April 1994, and since July 1992, upon founding
CapRock Fiber, another of our predecessor companies, as the President of its
general partner. In 1987, Mr. Thompson joined The Thompson Company, an
investment company, where he became a Vice President and assisted in the
acquisition and management of several of The Thompson Company portfolio
companies. From 1982 to 1986, Mr. Thompson worked in commercial real estate as a
broker and then with Trammell Crow Community Development Company. Since 1989,
Mr. Thompson has been a member of the board of directors and since 1995 he has
served as Chairman of the North Texas Tollway Authority and its predecessor, the
Texas Turnpike Authority. Mr. Thompson is also a board member of Cistercian
Preparatory School and the Southwestern Medical Foundation. Mr. Thompson has a
B.A. in Economics from Stanford University and a M.B.A. from the University of
Texas Graduate School of Business.

     Leo J. Cyr has served as President, Chief Operating Officer and Director of
CapRock since October 1999. Prior thereto, Mr. Cyr was Senior Vice President of
WorldCom's Intelligent Network Architecture and Development Organization from
September 1998 to September 1999, where he was responsible for designing and
maintaining intelligent network systems. Mr. Cyr spent 13 years with WorldCom in
various operational positions and as Vice President and Senior Vice President of
several engineering organizations. Additionally, Mr. Cyr was President, CEO and
co-founder of Unisite, Inc., a successful start-up company managing wireless
sites supporting multiple wireless operators. Prior to joining WorldCom, Mr. Cyr
spent five years in the U.S. Army and worked with Peat Marwick Mitchell & Co. as
a management consultant. Mr. Cyr holds an engineering degree from the U.S.
Military Academy.

     Kevin W. McAleer has served as Senior Vice President and Chief Financial
Officer of CapRock since April 1998 and as Treasurer and Secretary since August
1998. From 1996 to 1997, Mr. McAleer served as Chief Financial Officer,
Secretary and as a member of the Executive Management Committee of American Pad
and Paper Co., one of the largest manufacturers and marketers of paper-based
office products in North America. From 1990 to 1996, Mr. McAleer served as
Executive Vice President, Chief Financial Officer and as a member of the
Executive Management Committee of Rexene Corporation, which manufactures plastic
film and plastic resins. From 1985 to 1990, Mr. McAleer served as Senior Vice
President-Administration, Chief Financial Officer, Secretary and Treasurer, and
as a member of the Executive Management Committee and the Board of Directors of
Varo, Inc., which manufactures

                                      S-65
<PAGE>   68

electronics supplied primarily to U.S. military agencies, such as proprietary
night vision systems, high-reliability power systems and airborne missile
launchers. From 1981 to 1985, Mr. McAleer served as Vice President-Finance,
Chief Financial Officer, Secretary and Treasurer, and as a member of the
Executive Management Committee of Tocom, Inc., which designs and manufactures
high-technology communications products and services for the cable industry. Mr.
McAleer is a certified public accountant and is a member of the American
Institute of Certified Public Accountants and the Texas Society of Certified
Public Accountants. Mr. McAleer has a B.S. in Accounting/Economics from LaSalle
University in Philadelphia, Pennsylvania.

     T. George Hess has served as Senior Vice President of Network Services of
CapRock since January 2000. From April 1998 until January 2000, Mr. Hess served
as Assistant Vice President Operations and Service Delivery for GTE
Internetworking, a division of GTE providing Internet services to medium and
large corporations, where he was responsible for broadband provisioning, network
control center and the technical workforce for the 17,000 mile Internet backbone
network. Prior to joining GTE, Mr. Hess was Chief Operating Officer for Digital
Teleport Inc. in St. Louis where he raised capital for a six state fiber
network. From 1996 to 1997 Mr. Hess was Chief Service Officer for Tie
Communications and responsible for consolidating customer service operations
into a single center. From 1993 to 1996, Mr. Hess was Chief Service Officer for
MFS Intelenet, the CLEC business unit of MFS Communications Company, Inc., where
he was responsible for switch maintenance, engineering, provisioning,
installation and repair, customer service, billing and network control center
operations. Mr. Hess spent 16 years with United Telecommunications holding a
number of management positions including Vice President Voice Services where he
created the operator services organization for Sprint. Mr. Hess started his
telecommunications career at Ohio Bell in 1967 after graduating from Ohio
Wesleyan.

     Claude A. Robertson has been with CapRock since February 1998. Mr.
Robertson joined CapRock as the director of Carrier Sales, and was promoted to
Vice President of Carrier Sales in June 1998. In February 2000, Mr. Robertson
was promoted to Senior Vice President of Carrier Sales. From 1996 to January
1998, Mr. Robertson served as City Vice President at MFS WorldCom, Inc. in
Denver. From 1994 to 1996, he served as Senior Account Executive at MFS
Communications. From 1988 to 1993 Mr. Robertson worked for Sprint Communications
and held various sales positions with the firm. Mr. Robertson graduated from
Texas A&M University with a degree in Finance.

     Kenneth L. Monblatt started as the Senior Vice President and Chief
Information Officer of CapRock in February 2000. From 1999 to 2000, Mr. Monblatt
served as the Senior Vice President and Chief Information Officer of PageNet.
From 1995 to 1999, Mr. Monblatt served in several senior management roles as a
Director of Information Technology for PrimeCo Personal Communications. From
1987 to 1995, Mr. Monblatt served in a management consulting capacity with
several top tier consulting companies including TRW (formerly BDM), American
Management Systems and Modis Solutions (formerly Berger & Co.). Consulting
engagements centered on strategy, business development, process development and
large-scale systems implementations for communications providers worldwide. Mr.
Monblatt has his B.S. in Management Information Systems from University of
Maryland, in addition to executive program certifications from Yale School of
Management and Stanford's Graduate School of Business.

     Matthew M. Kingsley has served as Corporate Controller of CapRock since
August 1998. From August 1996 to August 1998, Mr. Kingsley was an audit manager
for KPMG LLP and held various positions with that firm from January 1988 until
February 1992. From February 1992 until August 1996, Mr. Kingsley held various
positions, including Senior Manager of Financial Planning, with DSC
Communications Corporation, a telecommunications equipment manufacturer. Mr.
Kingsley is a certified public accountant and is a member of the American
Institute of Certified Public Accountants and the Texas Society of Certified
Public Accountants. Mr. Kingsley has a B.B.A. in Accounting from the University
of Wisconsin.

     Timothy W. Rogers served as Executive Vice President of Integrated Services
Sales and Marketing from January 2000 until May 2000 and has served as a
director of CapRock since its formation in February 1998. Mr. Rogers remains
employed by CapRock. From February 1998 until January 2000,

                                      S-66
<PAGE>   69

Mr. Rogers served as Executive Vice President of Retail Sales and Network
Operations of CapRock. Mr. Rogers served as Executive Vice President of Retail
Sales and Network Operations and as a Director of CapRock Telecommunications
since April 1994. In 1992, Mr. Rogers co-founded Synergy Telecommunications,
Inc., a telecommunications company responsible for marketing a fiber network in
West Texas, Oklahoma, Colorado and New Mexico, and from February 1992 to April
1994 served as one of its three executive officers. In April 1994, CapRock
Investors purchased half of Synergy and subsequently Synergy changed its name to
CapRock Telecommunications. From August 1989 to December 1991, Mr. Rogers was a
sales manager of Qwest. From July 1988 to August 1989, Mr. Rogers was a Senior
Account Executive for Southwest Network Services. From April 1987 to June 1988,
Mr. Rogers was an account executive with Sprint. Mr. Rogers has a B.B.A. in
Marketing from Southwest Texas State University.

     Mark Langdale has served as a director of CapRock since its formation in
February 1998. Mr. Langdale served as a Director of CapRock Telecommunications
since April 1994 and Secretary of the general partner of CapRock Fiber since
1992. Mr. Langdale is President of Posadas USA, Inc., a subsidiary of Grupo
Posadas S.A. De C.V., a hotel management company domiciled in Mexico, a position
he has held since 1989. From 1987 to 1989, he served as Vice President for
Thompson Realty Company, a real estate investment company. Mr. Langdale
currently serves as a member of the Board of Directors of Grupo Posadas S.A. De
C.V. and as Chairman of the Texas Department of Economic Development. Mr.
Langdale earned his LL.B. at the University of Houston and a B.B.A. with honors
in Finance at the University of Texas.

     Christopher J. Amenson has served as a director of CapRock since its
formation in February 1998. Mr. Amenson has served as a director of IWL
Communications since June 1997. Mr. Amenson has served as President and Chief
Operating Officer of SBS Technologies, Inc., a manufacturer of computer
components, since April 1992 and as a director since August 1992. In October
1996 he became the Chief Executive Officer and in May 1997 he became Chairman of
the Board of Directors of SBS Technologies, Inc. For five years before joining
SBS Technologies, Inc., Mr. Amenson was President of Industrial Analytics, Inc.,
a Boston-based investment banking firm. Mr. Amenson holds a B.A. Degree in
Government from the University of Notre Dame and a Master's Degree in Business
Management from the Sloan Fellows Program at the Massachusetts Institute of
Technology.

     John R. Harris has served as a director of CapRock since August 1998. Since
December 1999, Mr. Harris has served as President and Chief Executive Officer of
ztango.com, a wireless Internet software and services company. Prior thereto,
Mr. Harris served as a Corporate Vice President at Electronic Data Systems
Corporation, an information and technology outsourcing and data processing
company ("EDS"), from 1997 until March 31, 1999 (when he resigned from EDS),
where he was responsible for marketing and corporate strategy. From 1989 to
1997, he served as President of the Communications Industry Group at EDS where
he was responsible for four business units directed toward wirelines, wireless,
media and interactive services. Mr. Harris is on the Board of Directors of
Applied Graphics Technologies, Inc., an independent provider of digital prepress
services. Mr. Harris received his undergraduate and graduate degrees in business
administration from West Georgia University.

                                      S-67
<PAGE>   70

                             PRINCIPAL SHAREHOLDERS

     The following table shows information concerning the beneficial ownership
of our Common Stock as of March 31, 2000 by: (1) each director, our Chief
Executive Officer and our other four most highly compensated executive officers
in fiscal year 1999, (2) each person we know to beneficially own more than 5% of
the outstanding shares of our Common Stock; and (3) all of our officers and
directors as a group. The address for Messrs. Thompson, Jr., Cyr, Rogers,
Roberts, Terrell, McAleer, CapRock Investors and Greenway Holdings, L.P. is
15601 Dallas Parkway, Suite 700, Dallas, Texas 75001. The address for Mr.
Leonards is 12000 Aerospace Ave., Suite 200, Houston, Texas 77034.

<TABLE>
<CAPTION>
                                                              SHARES BENEFICIALLY OWNED
                                                                  PRIOR TO OFFERING
                                                              --------------------------
                                                                              PERCENT
NAME AND ADDRESS                                                NUMBER      OF CLASS(1)
----------------                                              -----------   ------------
<S>                                                           <C>           <C>
Jere W. Thompson, Jr.(2)....................................   7,461,776          22.3%
Leo J. Cyr(3)...............................................     100,000             *
Ignatius W. Leonards(4).....................................   1,693,510           5.1%
Timothy W. Rogers(5)........................................   2,679,610           8.0%
Scott L. Roberts(6).........................................   2,595,110           7.8%
Timothy M. Terrell(7).......................................   2,573,110           7.7%
Kevin W. McAleer(8).........................................      20,000             *
Mark Langdale(9)............................................   8,344,967          25.0%
  5950 Berkshire, Suite 990
  Dallas, TX 75225
Christopher J. Amenson(10)..................................      12,665             *
  c/o SBS Technologies, Inc.
  2400 Louisiana Blvd., N.E.
  AFC Building 5, Suite 600
  Albuquerque, NM 87110
John R. Harris(11)..........................................      10,999             *
  2808 McKinney Ave., Suite 220
  Dallas, TX 75204
Jere W. Thompson, Sr.(12)...................................   7,025,046          21.0%
  Two Turtle Creek Village
  3838 Oak Lawn Ave., Suite 1850
  Dallas, TX 75219
Greenway Holdings, L.P.(2)..................................   2,014,082           6.0%
CapRock Investors(2)........................................   4,320,981          12.9%
All executive officers and directors as a group(13) (twelve
  persons)..................................................  15,948,814          47.6%
</TABLE>

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

  *  Less than 1% of the outstanding shares of the class.

 (1) Based upon 33,442,541 shares of Common Stock issued and outstanding as of
     March 31, 2000. The information contained in this table with respect to
     beneficial ownership reflects "beneficial ownership" as defined in Rule
     13d-3 under the Securities Exchange Act of 1934, which means generally any
     person who, directly or indirectly, has or shares voting power or
     investment power with respect to a security. Shares of Common Stock not
     outstanding but deemed beneficially owned by virtue of the right of an
     individual or group to acquire such shares within 60 days after March 31,
     2000 are treated as outstanding only when determining the amount and
     percentage of Common Stock owned by such individual or group. All
     information with respect to the beneficial ownership of any principal
     shareholder was furnished by such principal shareholder and we believe
     that, except as otherwise noted or pursuant to community property laws,
     each shareholder has sole voting and investment power with respect to
     shares shown.

 (2) Includes 4,320,981 shares held of record by CapRock Investors, 108,932
     shares held of record by CapRock Systems, Inc., 2,014,082 shares held of
     record by Greenway Holdings, L.P. CapRock

                                      S-68
<PAGE>   71

     Investors is a Texas joint venture, of which Jere W. Thompson, Jr. is the
     managing venturer and in which he owns a controlling interest and 17,000
     shares subject to currently exercisable options. The Joint Venture
     Agreement of CapRock Investors grants to Mr. Thompson, Jr. certain
     authority, including the authority to decide and cast all votes on behalf
     of CapRock Investors as a shareholder of CapRock. As a consequence, both
     CapRock Investors and Mr. Thompson, Jr. may each be deemed to be the
     beneficial owner of all of the shares. CapRock Systems, Inc. is a Texas
     corporation of which Mr. Thompson, Jr. owns 50% of the outstanding common
     stock and is an officer and a director; as a result he has shared voting,
     investment, and dispositive power with respect to the 108,932 shares held
     by CapRock Systems, Inc. Greenway Holdings, L.P. is a Texas limited
     partnership of which Mr. Thompson, Jr. is the general partner and has sole
     voting, investment and dispositive power; as a result, he may be deemed to
     be the beneficial owner of all of the shares held of record by Greenway
     Holdings, L.P.

 (3) Represents 100,000 shares of restricted stock issued under the Company's
     1998 Equity Incentive Plan and subject to vesting in equal installments
     over a three-year period beginning in 2000.

 (4) Includes 20,166 shares held by Ignatius W. Leonards as custodian for minor
     children and 12,500 shares subject to currently exercisable options.

 (5) Includes 8,970 shares held by Neal S. Rogers as custodian for minor
     children of Timothy W. Rogers and 12,500 shares subject to currently
     exercisable options. Neal S. Rogers is Timothy W. Roger's brother.

 (6) Includes 8,000 shares subject to currently exercisable options.

 (7) Includes 11,000 shares subject to currently exercisable options.

 (8) Represents 20,000 shares subject to currently exercisable options.

 (9) Includes 4,320,981 shares held of record by CapRock Investors, 108,932
     shares held of record of CapRock Systems, Inc., 628,064 shares held of
     record by Mr. Langdale as Trustee of the Mark Langdale 1999 Trust u/a/d
     April 12, 1999, 628,064 shares held of record by Mr. Langdale as Trustee of
     the Patricia Langdale 1999 Trust u/a/d April 12, 1999 and 3,333 shares
     subject to currently exercisable options. Under the Joint Venture Agreement
     of CapRock Investors, the approval of a majority-in-interest of the
     venturers is required to approve the disposition of the shares. Because of
     the ownership interest of Jere W. Thompson, Jr., Mark Langdale, and Jere W.
     Thompson, Sr., two of the three acting together can authorize or prevent a
     disposition of the shares. As a result, each may be deemed to be the
     beneficial owner of all of the shares. CapRock Systems, Inc. is a Texas
     corporation of which Mr. Langdale owns 50% of the outstanding common stock
     and is an officer and a director; as a result he has shared voting,
     investment and dispositive power with respect to the 108,932 shares held by
     CapRock Systems, Inc.

(10) Includes 10,665 shares subject to currently exercisable options.

(11) Includes 3,999 shares subject to currently exercisable options.

(12) Includes 1,302,283 shares held of record by The Williamsburg Corporation,
     4,320,981 shares held of record by CapRock Investors and 63,077 shares held
     of record by Jere W. Thompson, Sr.'s spouse. Under the Joint Venture
     Agreement of CapRock Investors, the approval of a majority-in-interest of
     the venturers is required to approve the disposition of the shares. Because
     of the ownership interest of Jere W. Thompson, Jr., Mark Langdale, and Jere
     W. Thompson, Sr., two of the three acting together can authorize or prevent
     a disposition of the shares. As a result, each may be deemed to be the
     beneficial owner of all of the shares. The Williamsburg Corporation is a
     Texas corporation, of which Mr. Thompson, Sr. is the president and a
     director; as a result he has shared voting, investment, and dispositive
     power with respect to the 1,302,283 shares held by The Williamsburg
     Corporation.

(13) Includes 95,997 shares subject to currently exercisable options and 115,000
     shares of restricted stock subject to vesting provisions.

                                      S-69
<PAGE>   72

                DESCRIPTION OF OUTSTANDING MATERIAL INDEBTEDNESS

     CapRock has outstanding $150.0 million of 1998 Senior Notes due 2008
bearing interest at the rate of 12% per annum and $210.0 million of 1999 Senior
Notes due 2009 bearing interest at the rate of 11 1/2% per annum. The 1998
Senior Notes and the 1999 Senior Notes are subject to the terms and conditions
of indentures between CapRock and Chase Manhattan Trust Company, National
Association (formerly known as PNC Bank, N.A.), as Trustee. The following
summary highlights some provisions of the indentures.

     The 1998 Senior Notes will mature on July 15, 2008. Interest on the 1998
Senior Notes is payable semiannually in cash on January 15 and July 15 of each
year, commencing January 15, 1999. The 1999 Senior Notes will mature on May 1,
2009. Interest on the 1999 Senior Notes is payable semiannually in cash on May 1
and November 1 of each year, commencing on November 1, 1999. The senior notes
are general senior unsecured obligations of CapRock, and as such, rank pari
passu in right of payment with all existing and future unsecured and
unsubordinated indebtedness of CapRock. The senior notes are effectively
subordinated in right of payment to all secured indebtedness of CapRock to the
extent of the value of the assets securing such indebtedness. In addition,
CapRock is a holding company, and the senior notes are effectively subordinated
to all existing and future indebtedness and other liabilities (including trade
payables) of CapRock's subsidiaries.

     The indentures contain covenants that, among other things, limit or
prohibit us from engaging in certain transactions including the following:

     - Borrowing additional money,

     - Paying dividends or making other distributions to our shareholders,

     - Limiting the ability of subsidiaries to make payments to us,

     - Making certain investments,

     - Creating certain liens on our assets,

     - Selling certain assets and using the proceeds from those sales for
       certain purposes,

     - Entering into transactions with affiliates, and

     - Engaging in certain mergers or consolidations.

     The events of default under the senior notes include various events of
default customary for such types of agreements including, among others, the
failure to pay principal and interest when due on the senior notes,
cross-defaults on other indebtedness, certain judgments, and certain events of
bankruptcy, insolvency and reorganization.

                                      S-70
<PAGE>   73

                                  UNDERWRITING

     Subject to the terms and conditions contained in an underwriting agreement
dated June 15, 2000, each underwriter named below has severally agreed to
purchase, and we have agreed to sell to such underwriter, the number of shares
of Common Stock set forth opposite the name of such underwriter below.

<TABLE>
<CAPTION>
                                                              NUMBER OF
                            NAME                               SHARES
                            ----                              ---------
<S>                                                           <C>
Salomon Smith Barney Inc. ..................................  2,250,000
Bear, Stearns & Co. Inc. ...................................  2,250,000
                                                              ---------
     Total..................................................  4,500,000
                                                              ---------
</TABLE>

     The underwriting agreement provides that the obligations of the several
underwriters to purchase the shares of Common Stock included in this offering
are subject to approval of certain legal matters by counsel and to certain other
conditions. The underwriters are obligated to purchase all of the shares of
Common Stock offered hereby (other than those shares covered by the
over-allotment option described below) if they purchase any of the shares.

     The underwriters propose to offer some of the shares directly to the public
at the public offering price set forth on the cover page of this prospectus
supplement and some of the shares to certain dealers at the public offering
price less a concession not in excess of $0.5275 per share. The underwriters may
allow, and such dealers may re-allow, a concession on sales to certain other
dealers. If all of the shares are not sold at the initial offering price, the
underwriters may change the public offering price and the other selling terms.

     We have granted to the underwriters an option, exercisable for 30 days from
the date of this prospectus supplement, to purchase up to 675,000 additional
shares of Common Stock at the offering price less underwriting discounts. The
underwriters may exercise such option solely for the purpose of covering
over-allotments, if any, in connection with the offering. To the extent that the
underwriters exercise such option, each underwriter will be obligated, subject
to certain conditions, to purchase a number of additional shares approximately
proportionate to such underwriter's initial purchase commitment.

     We, our officers and directors, and certain of our shareholders have agreed
that, for a period of 90 days from the date of this prospectus supplement, they
will not, without the prior written consent of the underwriters, dispose of or
hedge any shares of Common Stock or any securities convertible into or
exchangeable for our Common Stock. The underwriters in their discretion may
release any of the securities subject to these lock-up agreements at any time
without notice.

     The Common Stock is quoted on the Nasdaq Stock Market's National Market
under the symbol "CPRK."

     The following table shows the underwriting discounts and commissions to be
paid to the underwriters by us in connection with this offering. These amounts
are shown assuming both no exercise and full exercise of the underwriters'
option to purchase additional shares of Common Stock.

<TABLE>
<CAPTION>
                                                                    PAID BY CAPROCK
                                                              ---------------------------
                                                              NO EXERCISE   FULL EXERCISE
                                                              -----------   -------------
<S>                                                           <C>           <C>
Per share...................................................  $    .8775     $    .8775
Total.......................................................  $3,948,750     $4,541,063
</TABLE>

     In connection with the offering, the underwriters may purchase and sell
shares of the Common Stock in the open market. These transactions may include
over-allotment, syndicate covering transactions and stabilizing transactions.
Over-allotment involves syndicate sales of Common Stock in excess of the number
of shares to be purchased by the underwriters in the offering, which creates a
syndicate short position. Syndicate covering transactions involve purchases of
the Common Stock in the open market after the

                                      S-71
<PAGE>   74

distribution has been completed in order to cover syndicate short positions.
Stabilizing transactions consist of certain bids or purchases of the Common
Stock made for the purpose of preventing or retarding a decline in the market
price of the Common Stock while the offering is in progress.

     The underwriters also may impose a penalty bid. Penalty bids permit the
underwriters to reclaim a selling concession from a syndicate member when the
underwriters, in covering syndicate short positions or making stabilizing
purchases, repurchase shares originally sold by that syndicate member.

     Any of these activities may cause the price of the Common Stock to be
higher than the price that otherwise would exist in the open market in the
absence of such transactions. These transactions may be effected on the Nasdaq
Stock Market's National Market or in the over-the-counter market, or otherwise
and, if commenced, may be discontinued at any time.

     In addition, in connection with this offering, certain of the underwriters
(and selling group members) may engage in passive market making transactions in
the Common Stock on the Nasdaq Stock Market's National Market, prior to the
pricing and completion of the offering. Passive market making consists of
displaying bids on the Nasdaq Stock Market's National Market no higher than the
bid prices of independent market makers and making purchases at prices no higher
than those independent bids and effected in response to order flow. Net
purchases by a passive market maker on each day are limited to a specified
percentage of the passive market maker's average daily trading volume in the
Common Stock during a specified period and must be discontinued when such limit
is reached. Passive market making may cause the price of the Common Stock to be
higher than the price that otherwise would exist in the open market in the
absence of such transactions. If passive market making is commenced, it may be
discontinued at any time.

     We estimate that the total expenses of this offering will be $600,000.

     We have agreed to indemnify the underwriters against certain liabilities,
including liabilities under the Securities Act, or to contribute to payments the
underwriters may be required to make in respect of any of these liabilities.

     Certain of the underwriters, their affiliates and predecessors are
providing, have provided and may in the future provide investment banking or
other financial services to us and our affiliates in the ordinary course of
business and will receive customary compensation in connection therewith.

                                 LEGAL MATTERS

     Certain legal matters with respect to the validity of the shares of Common
Stock offered hereby will be passed upon for us by Munsch Hardt Kopf & Harr,
P.C., Dallas, Texas. Certain legal matters relating to the offering will be
passed upon for the underwriters by Paul, Hastings, Janofsky & Walker LLP, New
York, New York. As of the date of this prospectus supplement, certain members of
Munsch Hardt Kopf & Harr, P.C. beneficially own, in the aggregate, 1,350 shares
of our Common Stock.

                                    EXPERTS

     The consolidated financial statements of CapRock Communications Corp. as of
December 31, 1998 and 1999 and for each of the years in the three-year period
ended December 31, 1999 are included in this prospectus supplement in reliance
upon the report of KPMG LLP, independent certified public accountants, appearing
elsewhere herein and upon the authority of said firm as experts in accounting
and auditing.

                                      S-72
<PAGE>   75

                      WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports, proxy statements and other
information with the SEC. Our SEC filings are available to the public over the
Internet at the SEC's web site at http://www.sec.gov. You may also read and copy
any document we file at the SEC's public reference room at 450 Fifth Street,
N.W., Washington, D.C. 20549. These documents are also available at the public
reference rooms at the SEC's regional offices in New York, New York and Chicago,
Illinois. Please call the SEC at 1-800-SEC-0330 for further information on the
public reference rooms. Our SEC filings are also available at the offices of the
Nasdaq Stock Market's National Market in Washington, D.C.

     The SEC allows us to "incorporate by reference" the information we file
with it, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus supplement, and information that we file
later with the SEC will automatically update and supersede this information.
This prospectus incorporates by reference our documents listed below and any
future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of
the Securities Exchange Act of 1934, as amended, until we sell all of the
securities.

     - Our Annual Report on Form 10-K for the year ended December 31, 1999;

     - Our Quarterly Report on Form 10-Q for the three months ended March 31,
       2000;

     - Our Current Report on Form 8-K filed with the SEC on April 20, 2000; and

     - The description of our Common Stock contained in our registration
       statement on Form 8-A under the Exchange Act (File No. 000-24581).

     During the course of this offering and prior to the consummation of any
sales, each potential investor is invited to ask us questions concerning the
terms and conditions of this offering. Potential investors may also obtain any
additional information necessary to verify the accuracy of the information in
this prospectus supplement to the extent that we possess such information or can
acquire it without unreasonable effort or expense.

     Potential investors may obtain a copy of any of the agreements summarized
herein (subject to certain restrictions because of the confidential nature of
the subject matter) or any of our SEC filings without charge by written or oral
request directed to CapRock Communications Corp., Attention: Secretary, 15601
Dallas Parkway, Suite 700, Dallas, Texas 75001, (972) 982-9500.

                                      S-73
<PAGE>   76

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                               PAGE
                                                               ----
<S>                                                            <C>
CONSOLIDATED FINANCIAL STATEMENTS
Independent Auditors' Report................................    F-2
Consolidated Balance Sheets as of December 31, 1998 and
  1999......................................................    F-3
Consolidated Statements of Operations for the years ended
  December 31, 1997, 1998 and 1999..........................    F-4
Consolidated Statements of Stockholders' Equity and
  Comprehensive Income (Loss) for the years ended December
  31, 1997, 1998 and 1999...................................    F-5
Consolidated Statements of Cash Flow for the years ended
  December 31, 1997, 1998 and 1999..........................    F-6
Notes to Consolidated Financial Statements..................    F-7
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
Condensed Consolidated Balance Sheets as of December 31,
  1999 and March 31, 2000 (unaudited).......................   F-24
Condensed Consolidated Statements of Operations (unaudited)
  for the three months ended March 31, 1999 and 2000........   F-25
Condensed Consolidated Statements of Cash Flows (unaudited)
  for the three months ended March 31, 1999 and 2000........   F-26
Notes to Condensed Consolidated Financial Statements
  (unaudited)...............................................   F-27
</TABLE>

                                       F-1
<PAGE>   77

                          INDEPENDENT AUDITORS' REPORT

The Board of Directors and Stockholders
CapRock Communications Corp.:

     We have audited the accompanying consolidated balance sheets of CapRock
Communications Corp. and subsidiaries, as of December 31, 1998 and 1999, and the
related consolidated statements of operations, stockholders' equity and
comprehensive income (loss), and cash flows for each of the years in the three-
year period ended December 31, 1999. These consolidated financial statements are
the responsibility of the Company's management. Our responsibility is to express
an opinion on these consolidated financial statements based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of CapRock
Communications Corp. and subsidiaries as of December 31, 1998 and 1999, and the
results of their operations and their cash flows for each of the years in the
three-year period ended December 31, 1999, in conformity with generally accepted
accounting principles.

                                            KPMG LLP

Dallas, Texas
February 15, 2000

                                       F-2
<PAGE>   78

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS
                           DECEMBER 31, 1998 AND 1999
                       (IN THOUSANDS, EXCEPT SHARE DATA)

<TABLE>
<CAPTION>
                                                                1998       1999
                                                              --------   --------
<S>                                                           <C>        <C>
                                     ASSETS

Current assets:
  Cash and cash equivalents.................................  $    294   $  5,692
  Marketable securities.....................................    97,020    182,636
  Accounts receivable and unbilled services, less allowance
     for doubtful accounts of $710 and $5,208 at December
     31, 1998 and 1999, respectively........................    19,936    116,380
  Income tax receivable.....................................     1,405        411
  Costs and estimated earnings in excess of billings........     7,238        870
  Inventory.................................................     1,302      1,761
  Prepaid expenses and other................................       707      2,775
  Deferred income taxes.....................................     1,989      6,594
                                                              --------   --------
          Total current assets..............................   129,891    317,119
Property, plant and equipment...............................    71,968    249,969
Accumulated depreciation....................................   (12,361)   (21,368)
                                                              --------   --------
Property, plant and equipment, net..........................    59,607    228,601
Other assets................................................     2,468      3,115
                                                              --------   --------
          Total assets......................................  $191,966   $548,835
                                                              ========   ========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable and accrued expenses.....................  $ 26,851   $ 88,725
  Billings in excess of costs and estimated earnings........        --     11,541
  Unearned revenue..........................................       551        708
                                                              --------   --------
          Total current liabilities.........................    27,402    100,974
Senior notes, net of discount and unamortized debt issuance
  costs.....................................................   145,187    347,502
Deferred income taxes.......................................     3,315      4,329
                                                              --------   --------
          Total liabilities.................................   175,904    452,805
Stockholders' equity:
  Preferred stock, $.01 par value; 20,000,000 shares
     authorized; none issued................................        --         --
  Common stock, $.01 par value; 200,000,000 shares
     authorized; issued and outstanding, 28,932,395 and
     33,242,351 shares at December 31, 1998 and 1999,
     respectively...........................................       289        333
  Additional paid-in capital................................    10,522     94,543
  Retained earnings.........................................     5,608      2,067
  Accumulated other comprehensive income (loss).............         9         (6)
  Unearned compensation.....................................      (329)      (229)
  Treasury stock, at cost...................................       (37)      (678)
                                                              --------   --------
          Total stockholders' equity........................    16,062     96,030
                                                              --------   --------
          Total liabilities and stockholders' equity........  $191,966   $548,835
                                                              ========   ========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-3
<PAGE>   79

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                  YEARS ENDED DECEMBER 31, 1997, 1998 AND 1999
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE>
<CAPTION>
                                                               1997      1998       1999
                                                              -------   -------   --------
<S>                                                           <C>       <C>       <C>
Revenues:
  Carriers' carrier.........................................  $41,805   $80,628   $141,175
  Integrated services.......................................    8,640     9,516     21,870
  Systems services..........................................   24,904    31,630     29,578
                                                              -------   -------   --------
          Total revenues....................................   75,349   121,774    192,623
Cost of services............................................   52,471    83,221    115,676
                                                              -------   -------   --------
          Gross profit......................................   22,878    38,553     76,947
Operating expenses:
  Selling, general and administrative.......................   14,074    23,528     56,535
  Merger related expenses...................................       --     2,313         --
  Depreciation and amortization.............................    3,346     4,887      9,698
                                                              -------   -------   --------
          Total operating expenses..........................   17,420    30,728     66,233
                                                              -------   -------   --------
Operating income............................................    5,458     7,825     10,714
Interest expense............................................   (1,735)   (9,459)   (27,292)
Interest income.............................................      132     3,018      9,431
Other income................................................      220       106      1,526
                                                              -------   -------   --------
          Income (loss) before income taxes.................    4,075     1,490     (5,621)
Income tax expense (benefit)................................    1,513     1,267     (2,080)
                                                              -------   -------   --------
          Net income (loss).................................  $ 2,562   $   223   $ (3,541)
                                                              =======   =======   ========
Earnings (loss) per common share:
  Basic.....................................................  $  0.09   $  0.01   $  (0.11)
  Diluted...................................................  $  0.09   $  0.01   $  (0.11)
Weighted average shares outstanding:
  Basic.....................................................   27,984    28,899     31,727
  Diluted...................................................   28,481    30,028     31,727
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-4
<PAGE>   80

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS)
                  YEARS ENDED DECEMBER 31, 1997, 1998 AND 1999
                         (IN THOUSANDS, EXCEPT SHARES)
<TABLE>
<CAPTION>
                                                                                                ACCUMULATED
                                                                                                   OTHER
                                 COMMON STOCK        TREASURY STOCK    ADDITIONAL              COMPREHENSIVE
                              -------------------   ----------------    PAID-IN     RETAINED      INCOME         UNEARNED
                                SHARES     AMOUNT   SHARES    AMOUNT    CAPITAL     EARNINGS      (LOSS)       COMPENSATION
                              ----------   ------   -------   ------   ----------   --------   -------------   ------------
<S>                           <C>          <C>      <C>       <C>      <C>          <C>        <C>             <C>
BALANCE AT DECEMBER 31,
  1996......................  27,148,521    $271         --   $  --     $ 1,052     $ 2,563        $ --           $  --
Issuance of common stock....      79,222       1                 --         777          --          --              --
Proceeds from initial public
  common stock offering, net
  of expenses...............   1,450,000      15         --      --       6,982          --          --              --
Deferred compensation from
  compensatory stock option
  grants....................          --      --         --      --          --          --          --            (417)
Amortization of deferred
  compensation..............          --      --         --      --          --          --          --              21
Net income excluded from IWL
  Communications for the six
  months ended December 31,
  1996 as a result of
  conforming fiscal year
  end.......................          --      --         --      --          --         260          --              --
Comprehensive income:
        Net income..........          --      --         --      --          --       2,562          --              --
                              ----------    ----    -------   -----     -------     -------        ----           -----
BALANCE AT DECEMBER 31,
  1997......................  28,677,743     287         --      --       8,811       5,385          --            (396)
Issuance of common shares
  under stock option plans
  and restricted stock
  awards, including tax
  benefits..................      52,641      --         --      --         135          --          --             (33)
Acquisition of treasury
  shares under stock option
  plans.....................          --      --     (5,255)    (37)         --          --          --              --
Issuance of stock relating
  to acquisition............     207,266       2         --      --       1,576          --          --              --
Amortization of deferred
  compensation..............          --      --         --      --          --          --          --             100
Comprehensive income:
        Net income..........          --      --         --      --          --         223          --              --
        Currency translation
          adjustment........          --      --         --      --          --          --           9              --
Total comprehensive
  income....................
                              ----------    ----    -------   -----     -------     -------        ----           -----
BALANCE AT DECEMBER 31,
  1998......................  28,937,650     289     (5,255)    (37)     10,522       5,608           9            (329)
Issuance of common shares
  under stock option plans
  and restricted stock
  awards, including tax
  benefits..................     335,015       4         --      --       2,184          --          --              --
Acquisition of treasury
  shares under stock option
  plans.....................          --      --    (25,059)   (641)         --          --          --              --
Proceeds from public common
  stock offering, net of
  expenses..................   4,000,000      40         --      --      81,837          --          --              --
Amortization of deferred
  compensation..............                  --         --      --          --          --          --             100
Comprehensive loss:
        Net loss............          --      --         --      --          --      (3,541)         --              --
        Currency translation
          adjustment........          --      --         --      --          --          --         (15)             --
Total comprehensive loss....
                              ----------    ----    -------   -----     -------     -------        ----           -----
BALANCE AT DECEMBER 31,
  1999......................  33,272,665    $333    (30,314)  $(678)    $94,543     $ 2,067        $ (6)          $(229)
                              ==========    ====    =======   =====     =======     =======        ====           =====

<CAPTION>

                              CONSOLIDATED
                              STOCKHOLDERS'
                                 EQUITY
                              -------------
<S>                           <C>
BALANCE AT DECEMBER 31,
  1996......................     $ 3,886
Issuance of common stock....         778
Proceeds from initial public
  common stock offering, net
  of expenses...............       6,997
Deferred compensation from
  compensatory stock option
  grants....................        (417)
Amortization of deferred
  compensation..............          21
Net income excluded from IWL
  Communications for the six
  months ended December 31,
  1996 as a result of
  conforming fiscal year
  end.......................         260
Comprehensive income:
        Net income..........       2,562
                                 -------
BALANCE AT DECEMBER 31,
  1997......................      14,087
Issuance of common shares
  under stock option plans
  and restricted stock
  awards, including tax
  benefits..................         102
Acquisition of treasury
  shares under stock option
  plans.....................         (37)
Issuance of stock relating
  to acquisition............       1,578
Amortization of deferred
  compensation..............         100
Comprehensive income:
        Net income..........         223
        Currency translation
          adjustment........           9
                                 -------
Total comprehensive
  income....................         232
                                 -------
BALANCE AT DECEMBER 31,
  1998......................      16,062
Issuance of common shares
  under stock option plans
  and restricted stock
  awards, including tax
  benefits..................       2,188
Acquisition of treasury
  shares under stock option
  plans.....................        (641)
Proceeds from public common
  stock offering, net of
  expenses..................      81,877
Amortization of deferred
  compensation..............         100
Comprehensive loss:
        Net loss............      (3,541)
        Currency translation
          adjustment........         (15)
                                 -------
Total comprehensive loss....      (3,556)
                                 -------
BALANCE AT DECEMBER 31,
  1999......................     $96,030
                                 =======
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-5
<PAGE>   81

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOW
                  YEARS ENDED DECEMBER 31, 1997, 1998 AND 1999
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                1997       1998        1999
                                                              --------   ---------   ---------
<S>                                                           <C>        <C>         <C>
Cash flows from operating activities:
  Net income (loss).........................................  $  2,562   $     223   $  (3,541)
  Adjustments to reconcile net income (loss) to net cash
    provided by (used in) operating activities:
    Depreciation and amortization...........................     3,346       4,887       9,698
    Gain on sale of assets..................................      (105)        (51)        (13)
    Non-cash compensation expense...........................        --          --         139
    Deferred income taxes...................................       384       1,206      (2,157)
    Equity in earnings of unconsolidated joint ventures.....      (115)        (46)     (1,586)
    Amortization of discount and debt issuance costs,
      included in interest expense..........................        --         202       1,154
    Changes in operating assets and liabilities:
      Accounts receivable and unbilled services.............    (6,495)     (4,793)    (96,444)
      Income tax receivable.................................       554      (1,995)        668
      Costs and estimated earnings in excess of billings....        83      (7,238)      6,368
      Inventory.............................................     1,632        (279)       (459)
      Prepaid expenses and other............................    (1,119)        416        (702)
      Accounts payable and accrued liabilities..............     3,385      14,593      61,875
      Billings in excess of costs and estimated earnings....        --          --      11,541
      Unearned revenue......................................        --          --         157
                                                              --------   ---------   ---------
         Net cash provided by (used in) operating
           activities.......................................     4,112       7,125     (13,302)
Cash flows from investing activities:
  Purchases of property, plant and equipment................   (13,631)    (36,855)   (201,289)
  Purchase of marketable securities.........................        --    (145,000)   (283,613)
  Proceeds from sale of marketable securities...............        --      47,980     197,997
  Proceeds from disposal of property, plant and equipment...       644         304      22,833
  Investment in unconsolidated subsidiary...................        --        (169)       (551)
  Purchase of ICEL..........................................        --        (610)         --
                                                              --------   ---------   ---------
         Net cash used in investing activities..............   (12,987)   (134,350)   (264,623)
Cash flows from financing activities:
  Principal payments on notes payable.......................   (14,608)    (19,302)         --
  Proceeds from issuance of senior notes, net of debt
    issuance costs..........................................    20,554     144,985     201,161
  Proceeds from line of credit..............................    40,743      44,717          --
  Principal payments on line of credit......................   (40,405)    (45,869)         --
  Loan fees paid under long-term note agreement.............      (347)         --          --
  Net change in bank overdraft..............................      (957)         --          --
  Purchase of treasury stock................................        --         (37)       (641)
  Proceeds from stock option exercises......................       350         102         941
  Proceeds from issuance of common stock, net of issuance
    costs...................................................     6,997          --      81,877
  Other.....................................................      (213)       (606)         --
                                                              --------   ---------   ---------
         Net cash provided by financing activities..........    12,114     123,990     283,338
Effect of exchange rate on cash and cash equivalents........        --           9         (15)
                                                              --------   ---------   ---------
Net increase (decrease) in cash and cash equivalents........     3,239      (3,226)      5,398
Cash and cash equivalents at beginning of year..............       281       3,520         294
                                                              --------   ---------   ---------
Cash and cash equivalents at end of year....................  $  3,520   $     294   $   5,692
                                                              ========   =========   =========
Supplemental disclosure of cash flow information:
  Cash paid for interest including interest capitalized of
    $0, $183 and $6,724 in 1997, 1998 and 1999,
    respectively............................................  $  1,761   $   1,344   $  28,885
                                                              ========   =========   =========
  Cash paid (refunds received) for income taxes, net........  $    801   $   1,862   $    (974)
                                                              ========   =========   =========
Non-cash investing activity:
  Issuance of stock for ICEL acquisition....................  $     --   $   1,578   $      --
                                                              ========   =========   =========
  Issuance of restricted stock..............................  $     --   $      --   $     139
                                                              ========   =========   =========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-6
<PAGE>   82

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           DECEMBER 31, 1998 AND 1999

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

  (a) Basis of Presentation and Nature of Business

     The consolidated financial statements include CapRock Communications Corp.
("CapRock" or the "Company") and its majority owned subsidiaries. The Company
was formed on February 3, 1998, to serve as a holding company for the operations
of CapRock Telecommunications Corp., a Texas corporation ("CapRock
Telecommunications"), CapRock Fiber Network Ltd., a Texas limited partnership
("CapRock Fiber"), and IWL Communications, Incorporated, a Texas corporation,
doing business as CapRock Services Corp. ("CapRock Services"), and its wholly
owned subsidiaries upon the consummation of the business combination of those
companies (the "Combination"). All significant inter-company transactions are
eliminated in consolidation. The equity method is used to account for
unconsolidated investments in companies in which the Company exercises
significant influences over operating and financial policies, but does not have
a controlling interest. On August 26, 1998, pursuant to the Agreement and Plan
of Merger and Plan of Exchange dated February 16, 1998, as amended (the "Merger
Agreement"), among the Company, CapRock Telecommunications, CapRock Fiber,
CapRock Services and certain other parties, the Company completed the
Combination (note 2).

     The Company is a regional facilities-based integrated communications
provider offering local, long distance, Internet, data and private line services
to small and medium-sized businesses. The Company also provides switched and
dedicated access, regional and international long distance, private lines and
dark fiber to carrier customers. The Company is in the process of building an
advanced fiber network throughout Texas, Louisiana, Oklahoma, Arkansas, New
Mexico and Arizona. Additionally, the Company, through its wholly owned
subsidiary -- CapRock Services, provides communications solutions to customers
with operations in remote, difficult-access regions. The Company markets its
services through its internal sales representatives and a network of independent
agents.

  (b) Cash Equivalents and Short-Term Investments Available for Sale

     The Company considers all cash in bank accounts as cash equivalents.
Marketable securities consist of U.S. government, money market and commercial
paper securities, with maturities of less than one year. Marketable securities
are stated at cost and are adjusted for discount accretion and premium
amortization, which approximate fair value. The Company's short-term investment
objectives are safety, liquidity and yield.

  (c) Inventory

     Inventory substantially consists of parts and equipment held for resale.
Inventory that can be specifically identified using a unique identification
number is stated at the lower of specified cost or market. Inventory that cannot
be specifically identified is stated at the lower of cost or market, where cost
is determined using the first in first out method. Market value, in all cases,
represents the lower of replacement cost or net realizable value.

  (d) Property, Plant and Equipment

     Property, plant and equipment are stated at cost and include certain costs,
which are capitalized during the installation and expansion of the
telecommunications network including interest costs, payroll, general and
administrative costs related to the construction. Depreciation is computed using
the straight-line method over the estimated useful lives of the assets.
Leasehold improvements are amortized using the straight-line method over the
shorter of the estimated useful lives of the assets or the remaining terms of
the leases. Assets under construction are not depreciated until placed in
service.

                                       F-7
<PAGE>   83
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     In the process of building out its fiber network, the Company may enter
into Indefeasible Right to Use contracts ("IRUs") for the sale of fiber usage
rights and to provide the construction services for such fiber. The Company may
install additional conduits for these segments included in the IRUs for its own
use while performing the construction services. This additional conduit is
capitalized proportionately with the number of conduits placed, and depreciation
begins for these costs as the specific fiber segment is placed in service.

  (e) Revenues and Cost of Revenues

     The Company recognizes revenue from the following sources: Carriers'
Carrier, Integrated Services and Systems Services.

     Carriers' Carrier: Carriers' carrier revenue includes all carrier revenues
generated from the sale of domestic and international switched services, from
the sale of T-1 and DS-3 broadband capacity and from the sale and lease of dark
fiber. The revenue generated from international switched services represent
minutes of long distance traffic terminating in foreign countries, but generated
by domestic U.S. based long distance carriers. Such revenues are recognized when
the services are provided. The cost of revenues associated with these services
is based primarily on the direct costs associated with owned and leased
transmission capacity and the cost of transmitting and terminating traffic on
other carriers' facilities. Commissions paid to sales representatives or agents
to acquire customer call traffic are expensed in the period when associated call
revenues are recognized.

     The Company accounts for long-term construction contracts relating to the
development of telecommunications networks for customers using the
percentage-of-completion method, which would include the sale of fiber usage
rights through IRUs and the related construction services associated with
building the fiber network specified in the IRUs. Progress under the
percentage-of-completion is measured based upon costs incurred to date compared
with total estimated construction costs. Customers are billed based upon
contractual milestones.

     Integrated Services: Integrated services revenue includes all revenues
generated from the sale of telecommunications products to business and
residential customers. These products include local, long distance, Internet,
data and private line services. The Company records revenues for these
telecommunications services at the time of customer usage. The cost of revenues
associated with services is based primarily on the direct costs associated with
owned and leased transmission capacity and the cost of transmitting and
terminating traffic on other carriers' facilities. The cost of revenues for
local services also includes payments to local exchange carriers and
interexchange carriers for access and transport charges. Commissions paid to
sales representatives or agents to acquire customer call traffic are expensed in
the period when associated call revenues are recognized.

     Systems Services: Systems services revenue includes revenues generated from
the design, installation, leasing and sale of voice and data systems and
products, primarily to companies in the oil and gas industry. The revenues
associated with the leasing and sale of voice and data systems products are
recorded as the services are provided. The revenue associated with the design
and installation of voice and data systems products primarily relates to
communication system contracts involving the engineering and integration of
telecommunications systems and sales, service and maintenance of
telecommunications equipment. These contracts are typically fixed price and such
revenue is recognized based upon the percentage-of-completion method, primarily
based upon contract costs incurred to date compared with total estimated
contract costs. In 1997 systems services revenue included product resales to a
single customer which were substantially complete in May 1997.

                                       F-8
<PAGE>   84
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  (f) Business and Credit Concentration

     Financial instruments which potentially expose the Company to a
concentration of credit risk, as defined by SFAS No. 105, Disclosure of
Information about Financial Instruments with Off-Balance Sheet Risk and
Financial Instruments with Concentrations of Credit Risk, consist primarily of
accounts receivable from carriers, retail and commercial customers. The Company
extends credit to customers on an unsecured basis with the risk of loss limited
to outstanding amounts.

  (g) Income Taxes

     Income taxes are accounted for under the asset and liability method.
Deferred tax assets and liabilities are recognized for the future tax
consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases and operating loss and tax credit carryforwards. Deferred tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. The effect on deferred tax assets and liabilities of a
change in tax rates is recognized in income in the period that includes the
enactment date.

  (h) Stock-Based Compensation

     The Company accounts for its stock-based employee compensation plan using
the intrinsic value based method prescribed by Accounting Principles Board
Opinion No. 25, Accounting for Stock Issued to Employees ("APB No. 25"). As
such, compensation expense is recorded on the date of grant to the extent the
current market price of the underlying stock exceeds the exercise price. The
Company has provided pro forma disclosures as if the fair value-based method of
accounting for these plans, as prescribed by Statement of Financial Accounting
Standards ("SFAS") No. 123, Accounting for Stock-Based Compensation ("SFAS No.
123"), had been applied.

  (i) Foreign Currency Translation

     Results of operations for foreign investments are translated from the
designated functional currency to the U.S. dollar using average exchange rates
during the period, while assets and liabilities are translated at the exchange
rate in effect at the reporting date. Resulting gains and losses from
translating foreign currency financial statements are included in accumulated
other comprehensive income, a component of stockholders' equity.

  (j) Intangible Assets

     The Company recorded approximately $1.6 million of goodwill and $300,000
relating to other intangibles in connection with the acquisition of Integrated
Communications and Engineering Ltd. ("ICEL") (note 16). Goodwill represents the
excess of the purchase price over fair value of identifiable net assets acquired
and is amortized on a straight-line basis over the expected periods to be
benefited. Goodwill in connection with the acquisition of ICEL will be amortized
over 20 years. The Company assesses the recoverability of this intangible asset
by determining whether the amortization of the goodwill balance over its
remaining life can be recovered through undiscounted future operating cash
flows. The amount of goodwill impairment, if any, is measured based upon
projected discounted future operating cash flows using a discounted rate
reflecting the Company's average cost of funds. The assessment of the
recoverability of goodwill will be impacted if estimated future operating cash
flows are not achieved.

                                       F-9
<PAGE>   85
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  (k) Impairment of Long-Lived Assets

     The Company accounts for long-lived assets in accordance with the
provisions of SFAS No. 121, Accounting for the Impairment of Long-Lived Assets
and for Long-Lived Assets to be Disposed of. The Statement requires that
long-lived assets and certain identifiable intangibles be assessed for
impairment whenever events or changes in circumstances indicate that the
carrying amount of an asset may not be recoverable. Recoverability of assets to
be held and used is measured by a comparison of the carrying amount of an asset
to future net cash flows expected to be generated by the asset. If such assets
are considered to be impaired, the impairment to be recognized is measured by
the amount by which the carrying amount of the assets exceeds the fair value of
the assets. Assets to be disposed of are reported at the lower of the carrying
amount or fair value less costs to sell.

  (l) Fair Value of Financial Instruments

     The Company believes that the carrying amounts of its financial instruments
included in current assets and current liabilities approximate the fair value of
such items due to their short-term nature. As of December 31, 1999, the
estimated fair value and the carrying amount of the Company's 12% Senior Notes
due 2008 was $155.3 million and $145.7 million, respectively. As of December 31,
1999, the estimated fair value and the carrying amount of the Company's 11 1/2%
Senior Notes due 2009 was $215.3 million and $201.8 million, respectively.

  (m) Use of Estimates

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect certain reported amounts and disclosures. Accordingly,
actual results could differ from those estimates.

  (n) Earnings per Common Share

     In 1997, the Company adopted the Financial Accounting Standards Board
Statement No. 128 ("SFAS No. 128"), "Earnings Per Share". All earnings per share
amounts for all periods have been presented, and where necessary, restated to
conform to SFAS No. 128 requirements. (In thousands, except per share data).

<TABLE>
<CAPTION>
                                                           1997      1998      1999
                                                          -------   -------   -------
<S>                                                       <C>       <C>       <C>
Numerator:
          Net income (loss).............................  $ 2,562   $   223   $(3,541)
Denominator:
  Denominator for basic earnings (loss) per common
     share -- weighted average shares outstanding.......   27,984    28,899    31,727
Effect of dilutive securities:
  Warrants and employee stock options...................      497     1,129        --
                                                          -------   -------   -------
  Denominator for diluted earnings (loss) per common
     share -- weighted average shares outstanding.......   28,481    30,028    31,727
                                                          =======   =======   =======
Basic and diluted earnings (loss) per common share......  $  0.09   $  0.01   $ (0.11)
                                                          =======   =======   =======
</TABLE>

     For the year ended December 31, 1999, the effect of the Company's potential
common stock equivalents was omitted from the computation of diluted net loss
per common share as their effect would be antidilutive.

                                      F-10
<PAGE>   86
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  (o) Comprehensive Income

     On January 1, 1998, the Company adopted SFAS No. 130, "Reporting
Comprehensive Income" ("SFAS No. 130"). SFAS No. 130 establishes standards for
reporting and presentation of comprehensive income and its components in a full
set of financial statements. Comprehensive income consists of net income and
currency translation adjustments and is presented in the consolidated statements
of stockholders' equity and comprehensive income (loss). The Statement requires
only additional disclosures in the consolidated financial statements; it does
not affect the Company's financial position or results of operations. Prior to
1998, the Company's comprehensive income only consisted of net income.

(2) BUSINESS COMBINATION

     On August 26, 1998, pursuant to the Plan of Agreement of Merger and Plan of
Exchange dated February 16, 1998, as amended, the Company completed the mergers
with CapRock Telecommunications, CapRock Fiber and CapRock Services.
Accordingly, the Consolidated Balance Sheets as of December 31, 1998 and 1999
and the Consolidated Statements of Operations, Stockholders' Equity and
Comprehensive Income (Loss) and Cash Flows for each of the years in the three
year period ended December 31, 1999 include CapRock Telecommunications, CapRock
Fiber and CapRock Services as though these entities had always been a part of
CapRock.

     All previously outstanding shares of CapRock Services common stock ceased
to exist and each such share was converted into and became exchangeable for one
share of CapRock common stock, and all previously outstanding shares of CapRock
Telecommunications common stock ceased to exist, and each such share was
converted into and became exchangeable for 1.789030878 shares of CapRock common
stock and each one percent (1%) of the interests in CapRock Fiber issued and
outstanding was exchanged for 63,194.54 shares of CapRock common stock. The
Company issued 28,910,221 common shares in exchange for the outstanding common
share of CapRock Telecommunications, CapRock Fiber and CapRock Services.
Additionally, outstanding employee stock options of CapRock Services and CapRock
Telecommunications were converted at the above exchange factors into options to
purchase shares of CapRock common stock. The mergers and interest exchange
constituted a tax-free reorganization and was accounted for as a pooling of
interests.

     The transactions between CapRock, CapRock Services and CapRock Fiber have
been eliminated for all respective periods presented. Certain reclassifications
were made to CapRock Services financial statements to conform to CapRock's
presentations.

(3) MARKETABLE SECURITIES

     Investments in marketable securities at December 31, 1998 and 1999
consisted of money market investments of $46,666,281 and $9,974,718,
respectively and commercial paper securities of $50,353,508 and $172,661,433,
respectively.

     At December 31, 1998 and 1999, the estimated fair value of the Company's
commercial paper securities approximated cost, and the gross unrealized gains
and losses were not significant.

                                      F-11
<PAGE>   87
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

(4) PROPERTY, PLANT AND EQUIPMENT

     Property, plant and equipment is comprised of the following (amounts in
thousands):

<TABLE>
<CAPTION>
                                                       USEFUL LIVES    1998       1999
                                                       ------------   -------   --------
<S>                                                    <C>            <C>       <C>
Land.................................................      --         $   300   $  1,034
Buildings............................................     20-30         1,189        910
Leasehold improvements...............................  Lease Term       1,191      6,312
Office equipment, furniture and other................      5-7          9,707     19,023
Telecommunications network...........................     5-20         21,148    107,065
Equipment for rent/lease.............................     7-10         16,659     15,811
Construction in progress.............................      --          21,774     99,814
                                                                      -------   --------
          Total property, plant and equipment........                  71,968    249,969
Less accumulated depreciation........................                  12,361     21,368
                                                                      -------   --------
          Property, plant and equipment, net.........                 $59,607   $228,601
                                                                      =======   ========
</TABLE>

     The Company capitalizes interest cost as a component of the cost of
construction in progress. The following is a summary of interest costs incurred
during 1998 and 1999 (in thousands):

<TABLE>
<CAPTION>
                                                               1998     1999
                                                              ------   -------
<S>                                                           <C>      <C>
Interest cost capitalized...................................  $  183   $ 6,724
Interest cost charged to income.............................   9,459    27,292
                                                              ------   -------
          Total interest costs incurred.....................  $9,642   $34,016
                                                              ======   =======
</TABLE>

(5) COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS AND BILLINGS IN EXCESS OF
    COSTS AND EARNINGS

<TABLE>
<CAPTION>
                                                               1998      1999
                                                              ------   --------
                                                               (IN THOUSANDS)
<S>                                                           <C>      <C>
Costs incurred on uncompleted contracts.....................  $3,480   $ 13,288
Estimated earnings..........................................   6,119      4,360
                                                              ------   --------
                                                               9,599     17,648
Less: billings to date......................................   2,361     28,319
                                                              ------   --------
                                                              $7,238   $(10,671)
                                                              ======   ========
</TABLE>

     Included in accompanying balance sheets under the following captions:

<TABLE>
<CAPTION>
                                                               1998      1999
                                                              ------   --------
                                                               (IN THOUSANDS)
<S>                                                           <C>      <C>
Costs and estimated earnings in excess of billings..........  $7,238   $    870
Billings in excess of costs and earnings on uncompleted
  contracts.................................................      --    (11,541)
                                                              ------   --------
                                                              $7,238   $(10,671)
                                                              ======   ========
</TABLE>

(6) INVESTMENT IN KENWOOD SYSTEMS GROUP

     In September 1997, the Company sold its 50% ownership in Kenwood Systems
Group, Inc. ("KSG"), a California corporation. The remaining 50% of the voting
common stock is owned by Kenwood Americas Corporation ("KAC"). The results of
operations from January 1, 1997 through the date of sale (September 30, 1997) of
KSG have been reflected in the Company's operating results. The Company recorded
a gain on the sale of KSG of $66,226 in 1997.

                                      F-12
<PAGE>   88
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The investment was recorded using the equity method in which the original
investment, adjusted for the Company's proportionate share of KSG's income,
losses and dividend distributions, was recorded as a long-term investment. The
Company's original investment in KSG was $200,000. An additional investment of
$50,000 was made during the year ended December 31, 1997. The Company's
proportionate share of KSG's earnings for the year ended December 31, 1997 was
$115,107.

     The Company received a management fee of $76,995 from KSG for the year
ended December 31, 1997. Billings by the Company to KSG for the year ended
December 31, 1997 for insurance, supplies, equipment and management fees totaled
approximately $174,500.

(7) LEASES

     The Company leases equipment, office space, communication services and land
and buildings (used for transmission sites) under operating leases. Future
minimum lease payments under these lease agreements for each of the next five
years are summarized as follows (in thousands):

<TABLE>
<S>                                                          <C>
Year ending December 31,
  2000.....................................................  $ 4,809
  2001.....................................................    5,023
  2002.....................................................    4,481
  2003.....................................................    4,260
  2004.....................................................    3,928
  Thereafter...............................................   10,829
                                                             -------
          Total minimum lease payments.....................  $33,330
                                                             =======
</TABLE>

     As operating leases expire, it is expected that they will be replaced with
similar leases. Rent expense under operating leases totaled $1,419,812,
$1,027,651 and $4,684,807 for each of the years ended December 31, 1997, 1998
and 1999, respectively.

     The Company also enters into right of way agreements in connection with
building its fiber network. The annual expenditures relating to these agreements
is immaterial.

(8) DEBT

     In July 1998, the Company issued $150 million aggregate principal amount of
its 12% Senior Notes due 2008 (the "1998 Senior Notes"), which closed on July
16, 1998. Interest on the 1998 Senior Notes is payable semi-annually in arrears
on January 15 and July 15 of each year, commencing on January 15, 1999, at the
rate of 12% per annum. The 1998 Senior Notes are presented net of unamortized
debt issuance costs of $4,812,961 and $4,283,748 at December 31, 1998 and 1999,
respectively. The amortization of debt issuance cost is recorded to interest
expense and such amount was $202,159 and $529,213 in 1998 and 1999,
respectively. The net proceeds from the offering were used to repay existing
debt obligations. Such proceeds for debt payoffs totaled $26.8 million.

     In May 1999, the Company issued $210 million aggregate principal amount of
its 11 1/2% Senior Notes due 2009 (the "1999 Senior Notes"), which closed on May
18, 1999. Interest on the 1999 Senior Notes is payable semi-annually in arrears
on May 1 and November 1 of each year, commencing on November 1, 1999, at the
rate of 11 1/2% per annum. The 1999 Senior Notes are presented net of
unamortized debt issuance costs of $5,390,541 and unaccreted discount of
$2,823,862 at December 31, 1999. The amortization of debt issuance costs and
discount accretion are recorded to interest expense and such amounts were
$385,039 and $240,033, respectively, in 1999.

                                      F-13
<PAGE>   89
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The 1998 Senior Notes and 1999 Senior Notes contain certain covenants which
provide for limitations on indebtedness, dividends, asset sales and certain
other transactions and effectively prohibits the payment of cash dividends. The
proceeds from the 1998 Senior Notes and 1999 Senior Notes will be used to fund
capital expenditures for the construction of its fiber optic network, to expand
its sales offices, for potential acquisitions and for general working capital
purposes. The funds have been invested in high-grade liquid securities.

(9) RELATED PARTIES

     The Company currently leases private line services from affiliated
companies. Total payments to these affiliated companies for services totaled
$1,176,000 in 1998 and $1,810,000 in 1999. The Company believes that the prices
charged for such services do not exceed prices charged by unrelated parties.

     The Company's billing and back office systems are being developed by
RiverRock Systems, Ltd. ("RiverRock"), a limited partnership formed in July
1998. The Company owns a 49% interest in the limited partnership and David E.
Thompson owns a 50% limited partnership interest. Thompson Technology, Inc.
(which is owned by David Thompson, a brother of Jere W. Thompson, Jr. -- CEO of
CapRock Communications Corp.) is the general partner and owns a 1% general
partnership interest. The Company is committed to fund $700,000 for the
development of the systems. The Company contributed a total of $169,166 and
$550,904 in 1998 and 1999, respectively, as capital contributions to RiverRock.
In 1999, the Company was billed by RiverRock $698,652 for software and
programming services outside the scope of the original agreement, and this
amount was an outstanding payable as of December 31, 1999. The Company recorded
losses relating to its investment in RiverRock of $84,000 and $171,000 for the
years ended December 31, 1998 and 1999, respectively. The investment balances of
$85,166 and $465,070 as of December 31, 1998 and 1999, respectively, were
included in other assets.

     At December 31, 1999 the Company had a note receivable from one of its
officers. The note bears interest at the prime rate and requires annual
principal and interest payments for its term of three years. However, if the
officer is employed by the Company on a payment's due date the payment is
forgiven.

(10) ALLOWANCE FOR DOUBTFUL ACCOUNTS

     The activity in the allowance for doubtful accounts for the years ended
December 31, 1997, 1998 and 1999 is as follows (in thousands):

<TABLE>
<CAPTION>
                                                            1997     1998      1999
                                                           ------   -------   -------
<S>                                                        <C>      <C>       <C>
Allowance for doubtful accounts at beginning of year.....  $  399   $ 1,781   $   710
Additions charged to bad debt expense....................   1,382     1,650     6,010
Write-downs charged against the allowance, net of
  recoveries.............................................      --    (2,721)   (1,512)
                                                           ------   -------   -------
          Allowance for doubtful accounts at end of
            year.........................................  $1,781   $   710   $ 5,208
                                                           ======   =======   =======
</TABLE>

(11) LEASE CONTRACTS

     The Company provides telecommunications services to various customers under
operating leases. The services include agreements to lease capacity to customers
over the fiber optic line, communications equipment, line/satellite charges
and/or maintenance charges. These leases impose certain obligations on both the
lessor and lessee, which must be met during the term of the lease.

     A significant portion of these services requires that the Company have
access to international communication satellites. The Company has contracted
with a Russian entity for rights to access its portion of an international
communications satellite. The Company has agreed to pay a recurring monthly fee
to the entity based on the amount of satellite space segment utilized by each
lessee. Additionally, the

                                      F-14
<PAGE>   90
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Company has sold communication equipment to the entity. The Company utilizes
those facilities to provide communication services to various United States
energy and oil and gas companies and other customers doing business in Russia.

     The following is a summary of expected revenue to be earned during the next
five years by the Company on lease agreements executed on or before December 31,
1999 (in thousands).

<TABLE>
<S>                                                          <C>
Year ending December 31,
  2000.....................................................  $ 7,530
  2001.....................................................    5,891
  2002.....................................................    5,010
  2003.....................................................    4,533
  2004.....................................................    3,082
  Thereafter...............................................    5,972
                                                             -------
          Total............................................  $32,018
                                                             =======
</TABLE>

(12) STOCKHOLDERS' EQUITY

INITIAL PUBLIC OFFERING

     The Company, through its wholly owned subsidiary -- CapRock Services,
completed an initial public offering ("IPO") of common stock on June 12, 1997,
issuing 1,450,000 shares at $6.00 per share. The proceeds, net of commissions
and expenses, from this IPO totaled $6,996,505. In July 1997, the underwriters
exercised an over allotment option and purchased an additional 62,496 shares
resulting in net proceeds of $337,473.

SECONDARY PUBLIC OFFERING

     In May 1999, the Company completed a secondary public offering of common
stock, issuing 4,000,000 shares at $22.00 per share. The proceeds, net of
commissions and expenses, from this offering totaled $81,876,501.

COMMON STOCK

     CapRock was incorporated as a Texas corporation on February 3, 1998, to
serve as a holding company for the operations of CapRock Telecommunications,
CapRock Fiber and CapRock Services after completion of their business
combination (note 2) in conformance with the provisions of their Agreement and
Plan of Merger dated February 16, 1998. The Company issued 28,910,221 common
shares in exchange for the outstanding common shares and partnership interests
of CapRock Telecommunications, CapRock Fiber and CapRock Services.

CAPROCK TELECOMMUNICATIONS EMPLOYEE STOCK OPTION PLAN

     In September 1997, CapRock Telecommunications adopted a stock option plan
(the "CapRock Telecommunication Plan") pursuant to which the Company's Board of
Directors may grant nonqualified options to employees. The CapRock
Telecommunications Plan authorized grants of options to purchase up to 10% of
the common shares outstanding. All CapRock Telecommunications stock options have
a ten-year term and cannot be exercised prior to September 1, 1998. The options
vest over three to five-year periods. All options expire August 31, 2007. Upon
consummation of the merger, the outstanding stock options under this plan were
converted at the exchange factor (note 2) into options to purchase shares of
CapRock common stock.

                                      F-15
<PAGE>   91
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     In 1997, CapRock Telecommunications granted 380,313 nonqualified stock
options under the CapRock Telecommunications Plan with an exercise price of
$1.00 per share. The Company recorded deferred compensation of $417,100 related
to these stock option grants, which will be recognized over the vesting period.
As of December 31, 1999, 71,923 of the options previously granted were forfeited
and canceled, 86,212 options were exercised and 222,178 options were
outstanding.

CAPROCK SERVICES INCENTIVE STOCK OPTION PLAN

     In 1996, CapRock Services adopted an Employee Incentive Stock Option Plan
("CapRock Services Incentive Plan"). The option price per share could not be
less than the fair market value of a share on the date the option is granted.
Options under such plan generally vest at the rate of 20% per year over a five
year period; however; the Board at its discretion may accelerate the vesting
schedule. All options granted under the CapRock Services Incentive Plan on or
prior to the IPO date, June 12, 1997, vested in full on the offering date.
CapRock Services granted 342,214 options under the plan. The stock options
expire ten years from the date of grant. Upon consummation of the merger, the
outstanding stock options under this plan were converted at a one to one ratio
to purchase shares of CapRock common stock.

     As of December 31, 1999, 46,000 of the options previously granted were
forfeited, 140,148 options were exercised and 156,066 options were outstanding.
No additional options are available for grant under the CapRock Services
Incentive Plan.

WARRANTS

     The Company issued to its investment bankers warrants to purchase up to
145,000 shares of common stock, at an exercise price equal to 120% of the IPO
price. Upon consummation of the merger, the outstanding warrants were converted
at a one to one ratio to purchase shares of CapRock common stock. All of the
warrants were outstanding as of December 31, 1999.

     The warrants have certain demand and "piggy-back" registration rights that
may require the Company to register for resale the shares of Common Stock
issuable under the warrants. The warrants are exercisable for a period of four
years, beginning June 12, 1998.

CAPROCK EQUITY INCENTIVE PLAN

     On August 26, 1998, in connection with the approval of the merger, the
shareholders of the Company approved an equity incentive plan (the "CapRock
Plan"). The CapRock Plan authorized the granting of awards, which would allow up
to an aggregate of 5,000,000 share of common stock to be acquired by
participants and provides that a maximum of 2,500,000 shares of common stock may
be issued to any one participant. All prospective equity grants will be issued
from the CapRock Plan. The awards under the Plan may take the form of stock
options, stock appreciation rights, restricted stock awards, deferred stock,
stock reload options, and other stock based awards.

     Stock options granted under the CapRock Plan may be either options that are
intended to qualify for treatment as incentive stock options under Section 422
of the IRS tax code or options that do not so qualify (non-qualified stock
options). Options under the Plan may be granted to any person who is an officer
or other employee or consultants of the Company or any of its subsidiaries. The
exercise price of incentive stock options must be at least the fair value of a
share of the common stock on the date of grant (and not less than 110% of the
fair market value of a share of the common stock on the date of grant). The
exercise price of non-qualified stock options may be less than 100% of the fair
market value of a share of the common stock on the date of grant. The term of
the option may not exceed 10 years (5 years in the case of incentive stock
options granted to an optionee owning 10% or more of the common stock).

                                      F-16
<PAGE>   92
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     As of December 31, 1999, the Company granted 4,030,190 options under this
plan and these options vest over three to five years. As of December 31, 1999,
453,620 of the options granted were forfeited and canceled, 76,300 options
granted were exercised and 3,500,270 of the options were outstanding.

RESTRICTED STOCK

     In October 1999, the Company granted one of its executive officers 100,000
shares of restricted stock. The restriction on these shares expires over 3
years.

DIRECTOR STOCK OPTION PLAN

     On August 26, 1998, in connection with the approval of the merger, the
shareholders of the Company approved the Director Stock Option Plan (the
"CapRock Director Plan"). All options to be granted under the CapRock Director
Plan will be non-qualified stock options. A total of 400,000 shares of common
stock have been reserved for issuance under the CapRock Director Plan. Each
option will expire ten years from the date of grant and the options vest over
three years. Outstanding options will expire earlier if an optionee terminates
service as a director before the end of the first ten-year term. As of December
31, 1999, the Company granted 34,000 options under this plan and all were
outstanding as of December 31, 1999.

     The remaining options available for future grant as of December 31, 1999
are 1,423,430 options under the CapRock Plan and 366,000 under the CapRock
Director Plan.

     A summary of options activity under the plans described above is as
follows:

<TABLE>
<CAPTION>
                                                                             WEIGHTED-
                                                                NUMBER        AVERAGE
                                                              OF OPTIONS   EXERCISE PRICE
                                                              ----------   --------------
<S>                                                           <C>          <C>
BALANCE AT DECEMBER 31, 1996................................    160,614        $ 3.62
  Options granted...........................................    552,499          2.25
  Options exercised.........................................    (13,919)         3.56
  Options forfeited.........................................     (8,275)          .56
                                                              ---------        ------
BALANCE AT DECEMBER 31, 1997................................    690,919          2.56
  Options granted...........................................  1,721,600          6.58
  Options exercised.........................................    (53,726)         3.04
  Options forfeited.........................................    (98,926)         4.80
                                                              ---------        ------
BALANCE AT DECEMBER 31, 1998................................  2,259,867          5.51
  Options granted...........................................  2,370,005         20.82
  Options exercised.........................................   (235,015)         4.00
  Options forfeited.........................................   (482,343)        11.72
                                                              ---------        ------
BALANCE AT DECEMBER 31, 1999................................  3,912,514        $14.11
                                                              =========        ======
</TABLE>

                                      F-17
<PAGE>   93
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     A summary of options outstanding as of December 31, 1999 is as follows:

<TABLE>
<CAPTION>
                                                   NUMBER OF    WEIGHTED-AVERAGE    NUMBER OF
RANGE OF                                            OPTIONS        REMAINING         OPTIONS
EXERCISE PRICE                                    OUTSTANDING   CONTRACTUAL LIFE   EXERCISABLE
--------------                                    -----------   ----------------   -----------
<S>                                               <C>           <C>                <C>
$ 0.56 to $ 0.56................................     222,178          7.78            44,678
$ 3.56 to $ 4.49................................      55,666          5.92            55,666
$ 6.00 to $ 8.25................................   1,671,440          8.73           306,634
$ 9.56 to $13.81................................      50,000          9.12                --
$19.50 to $27.50................................   1,660,210          9.67                --
$31.50 to $40.50................................     253,020          9.50                --
                                                   ---------          ----           -------
$ 0.56 to $40.50................................   3,912,514          9.09           406,978
                                                   =========          ====           =======
</TABLE>

     The Company applied the intrinsic value method prescribed by APB Opinion
No. 25 in accounting for its plans. SFAS No. 123 requires disclosure of the
compensation cost for stock-based incentives granted based upon the fair value
at grant date for awards. Applying SFAS No. 123 would result in pro forma net
income (loss) and earnings (loss) per common share amounts as follows (in
thousands, except per share data):

<TABLE>
<CAPTION>
                                                                       1997    1998     1999
                                                                      ------   -----   -------
<S>                                                     <C>           <C>      <C>     <C>
Net income (loss).....................................  As reported   $2,562   $ 223   $(3,541)
                                                        Pro forma      2,385    (762)   (6,010)
Basic earnings (loss) per common share................  As reported     0.09    0.01     (0.11)
                                                        Pro forma       0.09   (0.03)    (0.19)
Diluted earnings (loss) per common share..............  As reported     0.09    0.01     (0.11)
                                                        Pro forma       0.08   (0.03)    (0.19)
</TABLE>

     The fair value of each option grant was estimated using the Black-Scholes
option pricing model with the following assumptions: risk free interest rate of
5.8%; expected option live of 2.5 years; expected volatility of 55%, 52% and
52%, and no expected dividend yield, in 1997, 1998 and 1999, respectively.

(13) INCOME TAXES

<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31, 1997
                                                            ---------------------------------------
                                                            U.S. FEDERAL   FOREIGN   STATE   TOTAL
                                                            ------------   -------   -----   ------
                                                                        (IN THOUSANDS)
<S>                                                         <C>            <C>       <C>     <C>
Current...................................................     $  947       $113      $70    $1,130
Deferred..................................................        365         --       18       383
                                                               ------       ----      ---    ------
          Total...........................................     $1,312       $113      $88    $1,513
                                                               ======       ====      ===    ======
</TABLE>

<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31, 1998
                                                           ---------------------------------------
                                                           U.S. FEDERAL   FOREIGN   STATE   TOTAL
                                                           ------------   -------   -----   ------
                                                                       (IN THOUSANDS)
<S>                                                        <C>            <C>       <C>     <C>
Current..................................................      $ --        $ --     $ 62    $   62
Deferred.................................................       897         134      174     1,205
                                                               ----        ----     ----    ------
          Total..........................................      $897        $134     $236    $1,267
                                                               ====        ====     ====    ======
</TABLE>

                                      F-18
<PAGE>   94
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31, 1999
                                                              ------------------------------
                                                              U.S. FEDERAL   STATE    TOTAL
                                                              ------------   -----   -------
                                                                      (IN THOUSANDS)
<S>                                                           <C>            <C>     <C>
Current.....................................................    $    --      $  77   $    77
Deferred....................................................     (2,978)      (287)   (3,265)
                                                                -------      -----   -------
          Total.............................................    $(2,978)     $(210)   (3,188)
                                                                =======      =====   =======
Tax equivalents related to non-qualified option exercises
  credited to additional paid-in capital....................                           1,108
                                                                                     -------
          Total provision (benefit).........................                         $(2,080)
                                                                                     =======
</TABLE>

     Foreign income taxes results from taxes relating to operations in the
United Kingdom and from taxes withheld on sales related to Russian operations.
Operating income (loss) from such operations for the years ended December 31,
1997, 1998 and 1999 were $555,000, $(441,000) and $(1,105,000) respectively.

     Income tax expense differs from the amount computed by applying the federal
income tax rate of 34% to earnings before taxes, as follows (in thousands):

<TABLE>
<CAPTION>
                                                             1997     1998     1999
                                                            ------   ------   -------
<S>                                                         <C>      <C>      <C>
Income tax provision at 34%...............................  $1,386   $  506   $(1,911)
Merger expenses not deductible for tax purposes...........      --      612        --
Expenses not deductible for tax purposes..................      33       29        63
State income tax expense, net of federal effect...........      89      155      (139)
Effect of foreign operations, including foreign tax
  credits.................................................     (49)     (11)      (22)
Exclusion of CapRock Fiber income tax benefit.............      39       --        --
Other.....................................................      15      (24)      (71)
                                                            ------   ------   -------
          Total...........................................  $1,513   $1,267   $(2,080)
                                                            ======   ======   =======
</TABLE>

     The tax effects of temporary differences and carryforwards, which result in
a significant portion of the deferred tax assets and liabilities, are as follows
(in thousands):

<TABLE>
<CAPTION>
                                                          1998                   1999
                                                  --------------------   --------------------
                                                  ASSETS   LIABILITIES   ASSETS   LIABILITIES
                                                  ------   -----------   ------   -----------
<S>                                               <C>      <C>           <C>      <C>
Effect on deferred taxes of carryforwards.......  $2,036     $   --      $4,412     $   --
Foreign tax credit..............................     207         --         207         --
Allowance for doubtful accounts.................     245         --       1,927         --
Unearned compensation...........................      --         17          22         --
Deferred revenue................................      --      1,906          --         --
Accrued vacation pay............................      40         --          --         --
Property, plant and equipment...................      --      1,962          --      4,359
Other...........................................      31         --          56         --
                                                  ------     ------      ------     ------
          Total deferred taxes..................  $2,559     $3,885      $6,624     $4,359
                                                  ======     ======      ======     ======
</TABLE>

     The deferred tax assets and liabilities are reflected in the financial
statements in the following balance sheet accounts (in thousands):

<TABLE>
<CAPTION>
                                                               1998     1999
                                                              ------   ------
<S>                                                           <C>      <C>
Current deferred tax assets.................................  $1,989   $6,594
Non-current deferred tax liability..........................   3,315    4,329
</TABLE>

                                      F-19
<PAGE>   95
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     A net operating loss of $11.5 million was available as of December 31, 1999
and will be available to offset future taxable income. The net operating loss
carryforward will expire in years 2018 and 2019; however, management believes
that this carryforward will be utilized prior to expiration. No valuation
allowance for deferred taxes at December 31, 1998 and 1999 is considered
necessary as management has determined that it is more likely than not that
these assets will be realized. The ultimate realization of deferred tax assets
is dependent upon the generation of future taxable income during the periods in
which those temporary differences become deductible. The Company considered the
scheduled reversal of deferred tax liabilities, projected future taxable income,
and tax planning strategies in making this assessment.

(14) COMMITMENTS

     The Company has entered into joint build agreements where it manages the
project. As manager, the Company is committed to meeting various construction
milestones during the term of the project. In the event that the completion
dates for any of the milestones are not met by the Company, penalties are
imposed on the Company. Such penalties incurred by the Company have been
immaterial and the Company believes that future penalties would also be
immaterial.

     At December 31, 1999 the Company had committed to make payments totaling
$44.5 million relating to the purchase of IRUs.

     The Company has an agreement with various vendors, which require minimum
usage. In the event such monthly commitments are not met, the Company is
required to remit to the vendor the difference between the commitments and the
actual usage. Such amount, if necessary, would be recorded as cost of revenue in
the period incurred.

     The Company entered into a volume purchase commitment of $13 million
relating to the purchase of telecommunications equipment. In the event the $13
million commitment is not fulfilled by CapRock, the Company shall pay the vendor
a penalty ranging from 3%-13% of the purchase commitment. The Company believes
that no penalties will be incurred under this contract.

(15) 401(k) PLANS

     The Company offers its qualified employees the opportunity to participate
in one of its defined contribution retirement plans qualifying under the
provisions of Section 401(k) of the Internal Revenue Code. Each employee may
contribute on a tax deferred basis a portion of annual earnings not to exceed
$10,000. The Company matches individual employee contributions up to a maximum
level, which in no case exceeds 6%. The Company's matching contributions to the
plan (after forfeitures) for the years ended December 31, 1997, 1998 and 1999
were $30,287, $81,086 and $233,319, respectively.

(16) ACQUISITION

     In January 1998, the Company completed the acquisition of Integrated
Communications and Engineering, Ltd. ("ICEL"), a communications systems
integrator and maintenance provider in Aberdeen, Scotland. The Company paid a
total purchase price of approximately $2.2 million comprised of approximately
$610,000 in cash and 207,266 shares of the Company's common stock. The
acquisition was accounted for as a purchase business combination, and
accordingly the purchase price was allocated to assets acquired and liabilities
assumed. Approximately $1.6 million was recorded as goodwill and $300,000 was
allocated to contracts as a result of the transaction.

                                      F-20
<PAGE>   96
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The following summarizes the unaudited consolidated data as though the
acquisition of ICEL occurred as of January 1, 1997 (in thousands):

<TABLE>
<CAPTION>
                                                              HISTORICAL   PRO FORMA
                                                              ----------   ---------
<S>                                                           <C>          <C>
Revenue.....................................................   $75,349      $78,679
Net income..................................................     2,562        2,681
Earnings per share..........................................      0.09         0.10
</TABLE>

(17) SUBSEQUENT EVENTS

     In January 2000, CapRock and 360networks Inc. (formerly Worldwide Fiber)
entered into a regional joint construction effort to jointly build approximately
1,300 miles of fiber network through Texas, New Mexico and Arizona. This will
also allow CapRock to increase the speed to market of its voice and high-speed
data services to cities along the route, including Tucson, Arizona; Santa Fe and
Albuquerque, New Mexico; and El Paso, Midland, San Angelo, and Temple, Texas.
The co-build contract calls for CapRock to construct a Texas fiber route from El
Paso through Temple to Austin, while 360networks Inc. is responsible for laying
fiber west of El Paso through Tucson and into Phoenix. The projected budget for
this development is in excess of $100 million. CapRock and 360networks Inc. will
each own one conduit and will jointly own those remaining in the multi-conduit
segment. Construction is scheduled to begin in the first quarter of 2000 with
completion expected by year end.

(18) SEGMENT REPORTING AND CONCENTRATION OF CUSTOMERS

     In June 1997, the Financial Accounting Standards Board issued Statement No.
131, Disclosures about Segments of an Enterprise and Related Information, which
the Company has adopted in 1998. The Company identifies such segments based on
management responsibility. The Company measures segment profit as operating
income, which is defined as income before interest expense and income taxes. The
revenue for the Carriers' Carrier, Integrated Services and Systems Services are
discussed in note 1(e). The Corporate Division includes certain general and
administrative functions and operating expenses. Merger related expenses of $2.3
million were included in corporate, which comprise the segment operating loss of
$3.5 million in 1998. The general and administrative expenses were allocated to
each of the respective divisions prior to 1998. Information regarding operating
segments is as follows (in thousands):

<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31, 1997
                                                ---------------------------------
                                    CARRIERS'   INTEGRATED   SYSTEMS
                                     CARRIER     SERVICES    SERVICES   CORPORATE   CONSOLIDATED
                                    ---------   ----------   --------   ---------   ------------
<S>                                 <C>         <C>          <C>        <C>         <C>
Revenue from external customers...   $41,805      $8,640     $24,904     $    --      $75,349
Depreciation and amortization.....     1,468         128       1,750          --        3,346
Capitalized interest..............        --          --          --          --           --
Operating income..................     3,300         596       1,562          --        5,458
Total assets......................    20,642       2,464      26,283          --       49,389
</TABLE>

<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31, 1998
                                                ---------------------------------
                                    CARRIERS'   INTEGRATED   SYSTEMS
                                     CARRIER     SERVICES    SERVICES   CORPORATE   CONSOLIDATED
                                    ---------   ----------   --------   ---------   ------------
<S>                                 <C>         <C>          <C>        <C>         <C>
Revenue from external customers...   $80,628      $9,516     $31,630     $    --      $121,774
Depreciation and amortization.....     1,758         136       2,993          --         4,887
Capitalized interest..............       183          --          --          --           183
Operating income (loss)...........    11,006         402         (54)     (3,529)        7,825
Total assets......................    59,220       2,827      30,223      99,696       191,966
</TABLE>

                                      F-21
<PAGE>   97
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

<TABLE>
<CAPTION>
                                                YEAR ENDED DECEMBER 31, 1999
                                              ---------------------------------
                                  CARRIERS'   INTEGRATED   SYSTEMS
                                   CARRIER     SERVICES    SERVICES   CORPORATE   CONSOLIDATED
                                  ---------   ----------   --------   ---------   ------------
<S>                               <C>         <C>          <C>        <C>         <C>
Revenue from external
  customers.....................  $141,175     $21,870     $29,578    $     --      $192,623
Depreciation and amortization...     5,653         963       3,082          --         9,698
Capitalized interest............     6,724          --          --          --         6,724
Operating income (loss).........    24,769      (3,794)        824     (11,085)       10,714
Total assets....................   235,514      90,377      25,390     197,554       548,835
</TABLE>

     All significant transactions and agreements of the Company, with the
exception of the operations of ICEL (Scotland) are generated in U.S. dollars.
The pertinent data relating to foreign operations is as follows (in thousands):

<TABLE>
<CAPTION>
                                                       YEAR ENDED DECEMBER 31, 1997
                                         --------------------------------------------------------
                                          U.S.     MEXICO   RUSSIA   INTERNATIONAL   CONSOLIDATED
                                         -------   ------   ------   -------------   ------------
<S>                                      <C>       <C>      <C>      <C>             <C>
Revenue from external customers........  $57,706   $6,495   $1,905      $9,243         $75,349
Operating income.......................    3,463    1,216      555         224           5,458
Long-lived assets......................   27,341       --       --          --          27,341
</TABLE>

<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31, 1998
                                            ------------------------------------------------
                                             U.S.     MEXICO    INTERNATIONAL   CONSOLIDATED
                                            -------   -------   -------------   ------------
<S>                                         <C>       <C>       <C>             <C>
Revenue from external customers...........  $79,185   $16,611      $25,978        $121,774
Operating income (loss)...................    3,766     1,920        2,139           7,825
Long-lived assets.........................   58,893        --        2,508          61,401
</TABLE>

<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31, 1999
                                           -------------------------------------------------
                                             U.S.     MEXICO    INTERNATIONAL   CONSOLIDATED
                                           --------   -------   -------------   ------------
<S>                                        <C>        <C>       <C>             <C>
Revenue from external customers..........  $154,710   $11,993      $25,920        $192,623
Operating income (loss)..................     8,040       600        2,074          10,714
Long-lived assets........................   227,323        --        2,948         230,271
</TABLE>

     All revenue was derived from unaffiliated customers. For the year ended
December 31, 1997, one customer provided $9,349,000 (or 12%) of the Company's
revenue. For the year ended December 31, 1998, one customer provided $13,985,000
(or 11%) and another customer provided $12,344,000 (or 10%) of the Company's
revenue. For the year ended December 31, 1999, one customer provided $28,968,000
(or 15%) and another customer provided $24,160,000 (or 13%) of the Company's
revenue.

                                      F-22
<PAGE>   98
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

(19) QUARTERLY RESULTS -- (UNAUDITED)

     The Company's unaudited quarterly results are as follows (in thousands,
except per share data):

<TABLE>
<CAPTION>
                                                        FOR THE 1998 QUARTER ENDED,
                                              -----------------------------------------------
                                              MARCH 31   JUNE 30   SEPTEMBER 30   DECEMBER 31
                                              --------   -------   ------------   -----------
<S>                                           <C>        <C>       <C>            <C>
Revenue.....................................  $24,412    $27,008     $35,284        $35,070
Gross profit................................    8,183      9,202       9,309         11,859
Net income (loss)...........................    1,358      1,515      (1,650)        (1,000)
Basic and diluted earnings (loss) per common
  share.....................................     0.05       0.05       (0.06)         (0.03)
</TABLE>

<TABLE>
<CAPTION>
                                                        FOR THE 1999 QUARTER ENDED,
                                              -----------------------------------------------
                                              MARCH 31   JUNE 30   SEPTEMBER 30   DECEMBER 31
                                              --------   -------   ------------   -----------
<S>                                           <C>        <C>       <C>            <C>
Revenue.....................................  $37,036    $37,560     $49,003        $69,024
Gross profit................................   14,655     15,022      20,241         27,029
Net income (loss)...........................   (1,705)    (1,901)         49             16
Basic and diluted earnings (loss) per common
  share.....................................    (0.06)     (0.06)       0.00           0.00
</TABLE>

                                      F-23
<PAGE>   99

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                     CONDENSED CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)

<TABLE>
<CAPTION>
                                                              DECEMBER 31,    MARCH 31,
                                                                  1999          2000
                                                              ------------   -----------
                                                                             (UNAUDITED)
<S>                                                           <C>            <C>
                                         ASSETS

Current assets:
  Cash and cash equivalents.................................    $  5,692      $  5,126
  Marketable securities.....................................     182,636       105,087
  Accounts receivable and unbilled services, less allowance
     for doubtful accounts of $5,208 and $4,393 at December
     31, 1999 and March 31, 2000, respectively..............     116,380       113,478
  Income tax receivable.....................................         411           249
  Costs and estimated earnings in excess of billings........         870         4,496
  Inventory.................................................       1,761         1,377
  Prepaid expenses and other................................       2,775         2,467
  Deferred income taxes.....................................       6,594         7,414
                                                                --------      --------
          Total current assets..............................     317,119       239,694
Property, plant and equipment...............................     249,969       325,285
Accumulated depreciation....................................     (21,368)      (25,400)
                                                                --------      --------
          Property, plant and equipment, net................     228,601       299,885
Other assets................................................       3,115         3,499
                                                                --------      --------
          Total assets......................................    $548,835      $543,078
                                                                ========      ========

                          LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable..........................................    $ 62,594      $ 60,613
  Accrued expenses..........................................      26,131        22,438
  Billings in excess of costs and earnings..................      11,541         8,751
  Unearned revenue..........................................         708         1,419
                                                                --------      --------
          Total current liabilities.........................     100,974        93,221
Senior notes, net of unamortized debt issuance costs........     347,502       347,860
Deferred income taxes.......................................       4,329         4,324
                                                                --------      --------
          Total liabilities.................................     452,805       445,405
Stockholders' equity:
  Preferred stock, $.01 par value; 20,000,000 shares
     authorized; none issued................................          --            --
  Common stock, $.01 par value; 200,000,000 shares
     authorized; issued and outstanding, 33,242,351 and
     33,442,541 shares at December 31, 1999 and March 31,
     2000, respectively.....................................         333           335
  Additional paid-in capital................................      94,543        95,965
  Retained earnings.........................................       2,067         2,271
  Accumulated other comprehensive loss......................          (6)          (11)
  Unearned compensation.....................................        (229)         (209)
  Treasury stock, at cost...................................        (678)         (678)
                                                                --------      --------
          Total stockholders' equity........................      96,030        97,673
                                                                --------      --------
          Total liabilities and stockholders' equity........    $548,835      $543,078
                                                                ========      ========
</TABLE>

     See accompanying notes to condensed consolidated financial statements
                                  (unaudited).

                                      F-24
<PAGE>   100

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

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

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              -------------------
                                                                1999       2000
                                                              --------   --------
<S>                                                           <C>        <C>
Revenues:
  Carriers' carrier.........................................  $24,452    $55,111
  Integrated services.......................................    4,504      9,680
  Systems services..........................................    8,080      5,900
                                                              -------    -------
          Total revenues....................................   37,036     70,691
Cost of services............................................   22,381     42,778
                                                              -------    -------
     Gross profit...........................................   14,655     27,913
Operating expenses:
  Selling, general and administrative.......................   12,551     19,095
  Depreciation and amortization.............................    1,480      4,089
                                                              -------    -------
          Total operating expenses..........................   14,031     23,184
                                                              -------    -------
Operating income............................................      624      4,729
Interest expense............................................   (4,256)    (6,533)
Interest income.............................................      845      2,236
Other expenses..............................................      (19)       (42)
                                                              -------    -------
     Income (loss) before income taxes......................   (2,806)       390
Income tax expense (benefit)................................   (1,101)       186
                                                              -------    -------
     Net income (loss)......................................  $(1,705)   $   204
                                                              =======    =======
Earnings (loss) per common share:
  Basic.....................................................  $ (0.06)   $  0.01
  Diluted...................................................  $ (0.06)   $  0.01
Weighted average shares outstanding:
  Basic.....................................................   28,943     33,336
  Diluted...................................................   28,943     36,006
</TABLE>

        See accompanying notes to condensed consolidated financial statements
                                  (unaudited).

                                      F-25
<PAGE>   101

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              -------------------
                                                                1999       2000
                                                              --------   --------
<S>                                                           <C>        <C>
Cash flows from operating activities:
  Net income (loss).........................................  $ (1,705)  $    204
  Adjustments to reconcile net income (loss) to net cash
     used in operating activities:
     Depreciation and amortization..........................     1,480      4,089
     Deferred income taxes..................................    (1,114)        (5)
     Equity in earnings of unconsolidated joint ventures....        46         --
     Amortization of discount and debt issuance costs,
      included in interest expense..........................       121        358
     Changes in operating assets and liabilities:
       Accounts receivable and unbilled services............   (15,508)     2,902
       Income taxes receivable..............................      (616)       162
       Costs and earnings in excess of billings.............     3,664     (3,626)
       Inventory............................................        28        385
       Prepaid expenses and other...........................      (488)      (108)
       Accounts payable and accrued liabilities.............     4,414     (5,675)
       Billings in excess of costs and estimated earnings...        --     (2,790)
       Unearned revenue.....................................       (12)       712
                                                              --------   --------
          Net cash used in operating activities.............    (9,690)    (3,392)
Cash flows from investing activities:
  Purchases of property, plant and equipment................   (23,819)   (87,039)
  Proceeds from sale of marketable securities...............    49,979     77,549
  Proceeds from disposal of property, plant and equipment...     3,136     11,718
  Investment in unconsolidated subsidiary...................   (15,515)        --
                                                              --------   --------
          Net cash provided by investing activities.........    13,781      2,228
Cash flows from financing activities:
  Purchase of treasury stock................................       (16)        --
  Proceeds from issuance of common stock....................        86        602
                                                              --------   --------
          Net cash provided by financing activities.........        70        602
Effect of exchange rate on cash and cash equivalents........        (8)        (4)
                                                              --------   --------
Net increase in cash and cash equivalents...................     4,153       (566)
Cash and cash equivalents at beginning of period............       294      5,692
                                                              --------   --------
Cash and cash equivalents at end of period..................  $  4,447   $  5,126
                                                              ========   ========
Supplemental disclosure of cash flow information:
  Cash paid for interest including interest capitalized of
     $361 and $4,442 for the three months ended March 31,
     1999 and 2000, respectively............................  $  8,950   $  9,000
                                                              ========   ========
Non-cash investing activity:
  Issuance of restricted stock..............................  $     --   $    167
                                                              ========   ========
</TABLE>

        See accompanying notes to condensed consolidated financial statements
                                  (unaudited).

                                      F-26
<PAGE>   102

                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

  Basis of Presentation and Nature of Business

     The consolidated financial statements include CapRock Communications Corp.
("CapRock" or the "Company") and its majority owned subsidiaries. The Company
was formed on February 3, 1998, to serve as a holding company for the operations
of CapRock Telecommunications Corp., a Texas corporation ("CapRock
Telecommunications"), CapRock Fiber Network Ltd., a Texas limited partnership
("CapRock Fiber"), and IWL Communications, Incorporated, a Texas corporation,
doing business as CapRock Services Corp. ("CapRock Services"), and its wholly
owned subsidiaries upon the consummation of the business combination of those
companies (the "Combination"). All significant inter-company transactions are
eliminated in the consolidation. The equity method is used to account for
unconsolidated investments in companies in which the Company exercises
significant influence over operating and financial policies, but does not have a
controlling interest.

     The Company is a regional facilities-based integrated communications
provider offering local, long distance, Internet, data and private line services
to small and medium-sized businesses. The Company also provides switched and
dedicated access, regional and international long distance, private lines and
dark fiber to carrier customers. The Company is in the process of building an
advanced fiber network throughout Texas, Louisiana, Oklahoma, Arkansas, New
Mexico and Arizona. Additionally, the Company, through its wholly owned
subsidiary -- CapRock Services, provides communications solutions to customers
with operations in remote, difficult-access regions. The Company markets its
services through its internal sales representatives and a network of independent
agents.

     The accompanying unaudited consolidated financial statements, which should
be read in conjunction with the consolidated financial statements and footnotes
included in the Company's 1999 Annual Report on Form 10-K, have been prepared in
accordance with generally accepted accounting principles for interim financial
information. Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial statements. In the opinion of management, all adjustments (consisting
only of normal recurring adjustments) considered necessary for a fair
presentation have been included. Accounting measurements at interim dates
inherently involve greater reliance on estimates than at year-end. The results
of operations for the three months ended March 31, 2000 are not necessarily
indicative of the results to be expected for the entire fiscal year ending
December 31, 2000.

(2) PUBLIC OFFERINGS

     In May 1999, the Company completed a secondary public offering of common
stock, issuing 4,000,000 shares at $22.00 per share. The proceeds, net of
commissions and expenses, from this offering totaled $81.9 million.

     On March 21, 2000, the Company filed a shelf registration statement with
the Securities and Exchange Commission ("SEC") to sell up to $900 million in
debt securities, preferred stock and common stock, which was declared effective
on April 11, 2000. On April 14, 2000 the Company filed two prospectus
supplements with the SEC under this registration statement to sell 5,000,000
shares of common stock and 2,500,000 shares of convertible preferred stock. The
Company currently expects to complete the common stock offering of 4 million
shares in the second quarter of 2000, however, no assurances can be made as to
when or if the offerings will be completed.

                                      F-27
<PAGE>   103
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)

(3) CREDIT FACILITY

     We recently obtained a commitment letter from The Chase Manhattan Bank for
a $100 million senior secured credit facility, which is subject to the
satisfaction of various conditions. The final terms and conditions of the credit
facility will depend on negotiation of definitive documentation, which we expect
will contain customary restrictive covenants, including financial covenants.

(4) SENIOR NOTE OFFERING

     In May 1999, the Company issued $210 million aggregate principal amount of
its 11 1/2% Senior Notes due 2009 (the "1999 Senior Notes"), which closed on May
18, 1999. Interest on the 1999 Senior Notes is payable semi-annually in arrears
on May 1 and November 1 of each year, commencing November 1, 1999, at the rate
of 11 1/2% per year. The Company received net proceeds from the offering, after
deducting the initial purchasers' discount and expenses, of approximately $201.3
million. The 1999 Senior Notes are senior unsecured obligations and as such rank
pari passu in right of payment with the Company's existing senior notes issued
in July 1998 (the "1998 Senior Notes") and with all the Company's future
unsecured and unsubordinated indebtedness. The indenture governing the 1999
Senior Notes has restrictions similar to those which currently exist for the
Company's 1998 Senior Notes. The proceeds have been, and will be, used to fund
capital expenditures for the construction of the fiber optic network, switching
equipment and other capital expenditures and to expand the Company's sales
offices, for potential acquisitions and for general working capital purposes.
Unutilized funds have been invested in short-term, high-grade investment
securities classified as available for sale.

     In July 1999, the Company filed an exchange offer Registration Statement
("Exchange Offer Registration Statement") with the SEC for the registration of
$210 million of principal amount of its registered senior notes due May 1, 2009
(the "Exchange Notes") to be offered in exchange for the 1999 Senior Notes (the
"Exchange Offer"). All of the 1999 Senior Notes were exchanged for Exchange
Notes pursuant to the Exchange Offer. The terms of the Exchange Notes are
identical in all material respects to the 1999 Senior Notes except that the
Exchange Notes have been registered under the Securities Act of 1933, as
amended.

(5) EARNINGS PER SHARE

     The following table sets forth the computation of basic and diluted
earnings (loss) per share (in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              -------------------
                                                                1999       2000
                                                              --------   --------
<S>                                                           <C>        <C>
Numerator:
  Net income (loss).........................................  $(1,705)   $   204
Denominator:
  Denominator for basic earnings (loss) per share-weighted
     average shares outstanding.............................   28,943     33,336
Effect of dilutive securities:
  Employee stock options and warrants.......................       --      2,670
                                                              -------    -------
  Denominator for diluted earnings (loss) per share-weighted
     average shares outstanding.............................  $28,943    $36,006
                                                              =======    =======
  Basic and diluted earnings (loss) per share...............  $ (0.06)   $  0.01
                                                              =======    =======
</TABLE>

                                      F-28
<PAGE>   104
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)

     For the three months ended March 31, 1999, the effect of the Company's
potential common stock equivalents was omitted from the computation of diluted
net loss per common share as their effect would be antidilutive.

(6) SEGMENT REPORTING

     The Company identifies segments based on management responsibility. The
Company measures segment profit as operating income, which is defined as income
before interest income and expense, other income and expenses and income taxes.
The Carriers' Carrier division includes all carrier revenues generated from the
sale of domestic and international switched services, from the sale of T-1 and
DS-3 broadband capacity and from the sale and lease of dark fiber through
indefeasible rights of use agreements ("IRUs"). The Integrated Services segment
includes all revenues generated from the sale of telecommunications products to
business and residential customers. These products include local, long distance,
Internet, data and private line services. The Systems Services segment includes
revenues generated from the design, installation, leasing and sale of voice and
data systems and products, primarily to companies in the oil and gas industry.
The Corporate division includes certain general and administrative functions and
operating expenses. Information regarding operating segments is as follows (in
thousands):

<TABLE>
<CAPTION>
                                                          THREE MONTHS ENDED MARCH 31, 1999
                                             ------------------------------------------------------------
                                             CARRIERS'   INTEGRATED   SYSTEMS
                                              CARRIER     SERVICES    SERVICES   CORPORATE   CONSOLIDATED
                                             ---------   ----------   --------   ---------   ------------
<S>                                          <C>         <C>          <C>        <C>         <C>
Revenues from external customers...........   $24,452      $4,504      $8,080     $    --      $37,036
Depreciation and amortization..............       602         138         740          --        1,480
Capitalized interest.......................       361          --          --          --          361
Operating income...........................     4,452      (1,142)        344      (3,030)         624
Total assets...............................    87,844       7,896      32,533      65,612      193,885
</TABLE>

<TABLE>
<CAPTION>
                                                          THREE MONTHS ENDED MARCH 31, 2000
                                             ------------------------------------------------------------
                                             CARRIERS'   INTEGRATED   SYSTEMS
                                              CARRIER     SERVICES    SERVICES   CORPORATE   CONSOLIDATED
                                             ---------   ----------   --------   ---------   ------------
<S>                                          <C>         <C>          <C>        <C>         <C>
Revenues from external customers...........   $55,111      $9,680      $5,900     $    --      $70,691
Depreciation and amortization..............     2,590         712         787          --        4,089
Capitalized interest.......................     4,442          --          --          --        4,442
Operating income...........................    14,987      (6,673)        202      (3,787)       4,729
Total assets...............................   276,879      35,204      29,474     201,521      543,078
</TABLE>

     All revenue was derived from unaffiliated customers.

(7) FIBER BUILD AGREEMENTS

     In February 1999, the Company completed a joint build agreement with Enron
Broadband Services, Inc. (formerly Enron Communications, Inc.) for approximately
1,070 miles of fiber network in Texas. The joint build arrangement is complete,
connecting Amarillo, Lubbock, Dallas, Fort Worth, Waco, Bryan, Austin, San
Marcos, San Antonio and Houston, Texas. After the sales of IRUs and the division
of fiber and conduits between us and Enron Broadband Services, Inc., the Company
received 56 fibers and one spare conduit.

     In November 1999, the Company entered into a project with Pathnet to
jointly build a 350-mile fiber network between Albuquerque, New Mexico and El
Paso, Texas. We will each own one conduit and will

                                      F-29
<PAGE>   105
                 CAPROCK COMMUNICATIONS CORP. AND SUBSIDIARIES

      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)

jointly own the two remaining conduits. Construction began in the first quarter
of 2000 with completion expected in 2001.

     In December 1999, the Company entered into a regional joint build
construction effort with AT&T to jointly build approximately 1,450 miles of
fiber network. The fiber ring passes through Dallas and Tyler, Texas; Shreveport
and Monroe, Louisiana; Pine Bluff, Little Rock and Fort Smith, Arkansas;
Muskogee, Oklahoma City, Norman and Lawton, Oklahoma; and Wichita Falls, Denton,
and Fort Worth, Texas. We are installing a four conduit facility with AT&T, with
each company owning one conduit and sharing the other two. In the past, we have
jointly constructed segments with Teleport Communications Inc., a competitive
local phone company, and with TCI Communications Inc., a cable television
company, both of which are now owned by AT&T.

     In January 2000, the Company entered into a regional joint build
construction agreement with 360networks (formerly Worldwide Fiber) to jointly
build approximately 1,300 miles of fiber network through Texas, New Mexico and
Arizona. This will also allow us to increase the speed to market of our voice
and high-speed data services to cities along the route, including Tucson,
Arizona; Santa Fe and Albuquerque, New Mexico; and El Paso, Midland, San Angelo,
and Temple, Texas. The co-build agreement calls for us to construct a Texas
fiber route from El Paso through Temple to Austin, while 360networks is
responsible for laying fiber west of El Paso through Tucson and into Phoenix. We
will each own one conduit and will jointly own the two remaining conduits.
Construction began in the first quarter of 2000 with completion expected in
early 2001.

     These joint build agreements provide several benefits, including reduction
of construction costs, accelerated acquisition of rights of way, the majority of
which are substantially completed, and the freeing up of resources to focus
attention on the construction of other portions of the network. Each city-pair
segment of our fiber network is operational upon completion of construction.
Should network construction be slowed or postponed, our existing network is
still operational and our integrated services strategy can continue essentially
unchanged.

                                      F-30
<PAGE>   106

PROSPECTUS

                         [CAPROCK COMMUNICATIONS LOGO]

                          CAPROCK COMMUNICATIONS CORP.

                                DEBT SECURITIES
                                PREFERRED STOCK
                                  COMMON STOCK
                               ------------------

     We may offer from time to time any combination of these securities in one
or more offerings, and certain of our shareholders may offer from time to time
shares of common stock. We will not receive any proceeds from the sale of shares
by the selling shareholders. For information on the methods of sale, you should
refer to the section entitled "Plan of Distribution."

     We will provide specific terms of these securities and their offering
prices in supplements to this prospectus.

     In the case of debt securities, these terms will include, as applicable,
the specific designation, aggregate principal amount, maturity, rate or formula
of interest, premium and terms for redemption. In the case of shares of
preferred stock, these terms will include, as applicable, the specific title and
stated value, any dividend, liquidation, redemption, conversion, voting and
other rights. In the case of common stock, these terms will include the
aggregate number of shares offered.

     The aggregate initial offering price of all of the securities which may be
sold pursuant to this prospectus will not exceed U.S. $900,000,000, or its
equivalent based on the applicable exchange rate at the time of issue in one or
more foreign currencies or currency units as shall be designated by CapRock
Communications Corp.

     Our common stock is quoted on the Nasdaq Stock Market's National Market
under the symbol CPRK. The applicable prospectus supplement will contain
information, where applicable, as to any other listing on the Nasdaq Stock
Market's National Market or any securities exchange of the securities covered by
the prospectus supplement.
                               ------------------

     You should read this prospectus and any prospectus supplement carefully
before you invest. THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE THE SALES OF
THE SECURITIES UNLESS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.
                               ------------------

     SEE "RISK FACTORS" ON PAGE 3 FOR A DISCUSSION OF MATTERS THAT YOU SHOULD
CONSIDER BEFORE INVESTING IN THESE SECURITIES.
                               ------------------

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.
                               ------------------

                 The date of this prospectus is April 11, 2000.
<PAGE>   107

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
About This Prospectus.......................................    1
Where You Can Find More Information.........................    1
The Company.................................................    2
Risk Factors................................................    3
Ratio of Earnings to Fixed Charges and Ratio of Earnings to
  Combined Fixed Charges and Preferred Stock Dividends......    3
Use of Proceeds.............................................    3
Description of Debt Securities..............................    3
Description of Preferred Stock..............................   10
Description of Common Stock.................................   11
Description of Outstanding Material Indebtedness............   11
Description of Outstanding Capital Stock....................   12
Selling Shareholders........................................   13
Plan of Distribution........................................   14
Legal Matters...............................................   16
Experts.....................................................   16
</TABLE>

                                      (ii)
<PAGE>   108

                             ABOUT THIS PROSPECTUS

     This prospectus provides you with a general description of the securities
we and certain of our shareholders may offer. Each time we sell securities, we
will provide a prospectus supplement that will contain specific information
about the terms of that offering. The prospectus supplement may also add, update
or change information contained in this prospectus. You should read both this
prospectus and any prospectus supplement together with additional information
described under the heading "Where You Can Find More Information."

                      WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission (the "SEC"). Our SEC
filings are available to the public over the Internet at the SEC's web site at
http://www.sec.gov. You may also read and copy any document we file at the SEC's
public reference room at 450 Fifth Street, N.W., Washington, D.C. 20549. These
documents are also available at the public reference rooms at the SEC's regional
offices in New York, New York and Chicago, Illinois. Please call the SEC at
1-800-SEC-0330 for further information on the public reference rooms. Our SEC
filings are also available at the offices of the Nasdaq Stock Market's National
Market in Washington, D.C.

     The SEC allows us to "incorporate by reference" the information we file
with it, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file later with
the SEC will automatically update and supersede this information. This
prospectus incorporates by reference our documents listed below and any future
filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the
Securities Exchange Act of 1934 until we sell all of the securities:

     - Annual Report on Form 10-K for the year ended December 31, 1999; and

     - Registration statement on Form 8-A filed July 6, 1998.

     Potential investors may obtain a copy of any of the agreements summarized
herein (subject to certain restrictions because of the confidential nature of
the subject matter) or any of our SEC filings without charge by written or oral
request directed to CapRock Communications Corp., Attention: Secretary, 15601
Dallas Parkway, Suite 700, Dallas, Texas 75001, (972) 982-9500. We maintain a
worldwide web site at www.caprock.com. The reference to our worldwide web
address does not constitute incorporation by reference of the information
contained at the site.

     You should rely only on the information incorporated by reference or
provided in this prospectus or any prospectus supplement. We have not authorized
anyone else to provide you with different information. We are not making an
offer of these securities in any state where the offer is not permitted. You
should not assume that the information in this prospectus or any prospectus
supplement is accurate as of any date other than the date on the front of those
documents.

                                        1
<PAGE>   109

                                  THE COMPANY

     CapRock Communications Corp. ("CapRock") is a leading facilities-based
integrated communications service provider to small and medium-sized business
and communications carrier customers in the Southwestern United States. We offer
business customers an integrated bundle of communications products and services
including local exchange, domestic and international long distance, enhanced
voice, data, Internet and dedicated private line services. Additionally, we
offer communications-intensive business and carrier customers dark fiber, high
bandwidth dedicated fiber infrastructure, terminating access for domestic and
international long distance and ATM, frame relay and IP data transport services.
We believe that our current and planned networks will provide our customer base
the most comprehensive service alternative to the incumbent and other
competitive communications service providers in our region.

     Our communications services are provided over our scalable fiber, voice and
data networks which, upon completion, will connect nearly every Tier I, Tier II
and Tier III market in the six-state region of Texas, Louisiana, Arkansas,
Oklahoma, New Mexico and Arizona. At year-end 1999, our inter-city long-haul
fiber network consisted primarily of 96 fiber strands covering approximately
3,000 route miles, which we expect to expand to approximately 7,000 route miles
by year-end 2000. Additionally, at year-end 1999, we provided switch-based
competitive local exchange services in ten markets, which we expect to expand to
48 markets by year-end 2000. We currently have 11 voice and 13 data switches
installed and operational on our network, which we expect to expand to 14 voice
and 17 data switches by year-end 2000.

     Our principal executive offices are located at 15601 Dallas Parkway, Suite
700, Dallas, Texas 75001, and our telephone number is (972) 982-9500.

RECENT DEVELOPMENTS

     Please see the applicable prospectus supplement and our recent public
filings for recent developments.

                                        2
<PAGE>   110

                                  RISK FACTORS

     Before you invest in our securities, you should carefully consider the
risks involved. These risks include, but are not limited to, any risks that may
be described in other filings we make with the SEC or in the prospectus
supplements relating to specific offerings of securities.

      RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO COMBINED
                  FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

     The ratio of earnings to fixed charges and earnings to combined fixed
charges and preferred stock dividends for each of the periods indicated is as
follows:

<TABLE>
<CAPTION>
                                                                     FISCAL YEAR ENDED
                                                              --------------------------------
                                                              1995   1996   1997   1998   1999
                                                              ----   ----   ----   ----   ----
<S>                                                           <C>    <C>    <C>    <C>    <C>
Ratio of earnings to fixed charges..........................  1.0    1.4    2.6    1.1     --
Ratio of earnings to combined fixed charges and preferred
  stock dividends...........................................  1.0    1.4    2.6    1.1     --
</TABLE>

     For this ratio, earnings consist of earnings (loss) before income taxes,
minority interest and discontinued operations plus fixed charges excluding
capitalized interest. Fixed charges consist of interest expensed and
capitalized, amortized premiums, discounts and capitalized expenses related to
indebtedness, plus the portion of rent expense under operating leases deemed by
us to be representative of the interest factor. We had deficiencies of earnings
to fixed charges of approximately $12 million for the year ended December 31,
1999.

                                USE OF PROCEEDS

     Unless the applicable prospectus supplement states otherwise, the net
proceeds from the sale of the offered securities will be used to fund the
development and growth of our communications networks and business and for
potential business acquisitions, working capital and general corporate purposes.
Until we use the net proceeds in this manner, we may temporarily use them to
make short-term investments or reduce short-term borrowings.

     We will not receive any proceeds from the sale of any shares of common
stock by the selling shareholders.

                         DESCRIPTION OF DEBT SECURITIES

     This section describes the general terms and provisions of the debt
securities. The applicable prospectus supplement will describe the specific
terms of the debt securities offered through that prospectus supplement as well
as any general terms described in this section that will not apply to those debt
securities.

     The debt securities will be our direct unsecured general obligations and
may include debentures, notes, bonds and/or other evidences of indebtedness. The
debt securities will be either senior debt securities or subordinated debt
securities. The debt securities will be issued under one or more separate
indentures between us and an institution to be named in the applicable
prospectus supplement as trustee. Senior debt securities will be issued under a
senior indenture, and subordinated debt securities will be issued under a
subordinated indenture. Together, the senior indentures and the subordinated
indentures are called indentures.

     We have summarized selected provisions of the indentures below. The summary
is not complete. We have also filed the forms of the indentures as exhibits to
the registration statement. You should read the indentures for provisions that
may be important to you before you buy any debt securities.

                                        3
<PAGE>   111

GENERAL TERMS OF DEBT SECURITIES

     The debt securities issued under any indenture may be issued in one or more
series. Each indenture may provide that there may be more than one trustee under
the indenture, each with respect to one or more series of debt securities. The
indentures may provide that any trustee under any indenture may resign or be
removed with respect to one or more series of debt securities issued under that
indenture, and a successor trustee may be appointed to act with respect to that
series.

     If two or more persons are acting as trustee with respect to different
series of debt securities issued under the same indenture, each of those
trustees will be a trustee of a trust under that indenture separate and apart
from the trust administered by any other trustee. In that case, except as may
otherwise be indicated in an applicable prospectus supplement, any action
described in the applicable prospectus supplement to be taken by the trustee may
be taken by each of those trustees only with respect to the one or more series
of debt securities for which it is trustee.

     A prospectus supplement relating to a series of debt securities being
offered will include specific terms relating to the offering and that series.
These terms will contain some or all of the following and may include other
terms:

     - the title of the debt securities;

     - any limit on the aggregate principal amount of the debt securities;

     - the purchase price of the debt securities, expressed as a percentage of
       the principal amount;

     - the date or dates on which the principal of and any premium on the debt
       securities will be payable or the method for determining the date or
       dates;

     - if the debt securities will bear interest, the interest rate or rates or
       the method by which the rate or rates will be determined;

     - if the debt securities will bear interest, the date or dates from which
       any interest will accrue, the interest payment dates on which any
       interest will be payable, the record dates for those interest payment
       dates and the basis upon which interest shall be calculated if other than
       that of a 360 day year of twelve 30-day months;

     - the place or places where payments on the debt securities will be made
       and the debt securities may be surrendered for registration of transfer
       or exchange;

     - if we will have the option to redeem all or any portion of the debt
       securities, the terms and conditions upon which the debt securities may
       be redeemed;

     - the terms and conditions of any sinking fund or other similar provisions
       obligating us or permitting a holder to require us to redeem or purchase
       all or any portion of the debt securities prior to final maturity;

     - the currency or currencies in which the debt securities are denominated
       and payable if other than U.S. dollars;

     - whether the amount of any payments on the debt securities may be
       determined with reference to an index, formula or other method and the
       manner in which such amounts are to be determined;

     - any additions or changes to the events of default in the respective
       indentures;

     - the percentage of the principal amount of debt held by the holders
       necessary to require the trustee to take action;

     - any terms, conditions or restrictions upon the issuance of additional
       debt;

     - any terms, conditions or restrictions on dividends or distribution on any
       capital stock;

     - any additions or changes with respect to the other covenants in the
       respective indentures;

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<PAGE>   112

     - the terms and conditions, if any, upon which the debt securities may be
       convertible into common stock or preferred stock;

     - whether the debt securities will be issued in certificated or book-entry
       form;

     - whether the debt securities will be in registered or bearer form and, if
       in registered form, the denominations of the debt securities if other
       than $1,000 and multiples of $1,000;

     - the applicability of the defeasance and covenant defeasance provisions of
       the applicable indenture;

     - provisions relating to the modification of the terms of the indentures;

     - any subordination provisions; and

     - any other terms of the debt securities consistent with the provisions of
       the applicable indenture.

     Debt securities may be issued under the indentures as original issue
discount securities to be offered and sold at a substantial discount from their
stated principal amount. Special Federal income tax, accounting and other
considerations applicable to original issue discount securities will be
described in the applicable prospectus supplement.

     Unless otherwise provided with respect to a series of debt securities, the
debt securities will be issued only in registered form, without coupons, in
denominations of $1,000 and multiples of $1,000.

SOME COVENANTS

     Under the indentures, we will be required to:

     - pay the principal, interest and any premium on the debt securities when
       due;

     - maintain a place of payment;

     - deliver a report to the trustee at the end of each fiscal year reviewing
       our obligations under the indentures; and

     - deposit sufficient funds with any paying agent on or before the due date
       for any payment of principal, interest or any premium.

     An indenture may or may not include other covenants which will be described
in the applicable prospectus supplement.

PAYMENT AND TRANSFER

     Unless we designate otherwise, we will pay principal, interest and any
premium on fully registered securities in New York, New York. We will make
interest payments by check mailed to the persons in whose names the debt
securities are registered on days specified in the indentures or any prospectus
supplement. We will make debt securities payments in other forms at a place we
designate and specify in a prospectus supplement. You may transfer or exchange
fully registered debt securities at the corporate trust office of the trustee or
at any other office or agency maintained by us for these purposes, without
having to pay any service charge except for any tax or governmental charge.

OUR SENIOR DEBT SECURITIES

     Generally speaking, our senior debt securities will rank equally with all
of our other senior debt and unsubordinated debt. As of December 31, 1999, the
total amount of our debt that would rank equally with our senior debt securities
was approximately $347.5 million, net of discount and unamortized debt issuance
costs. See "Description of Outstanding Material Indebtedness." All series of
senior debt securities will rank equally in right of payment with each other.

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<PAGE>   113

     Senior debt is defined to include all notes or other unsecured evidences of
indebtedness, including our guarantees, not expressed to be subordinate or
junior in right of payment to any other indebtedness that we have.

OUR SUBORDINATED DEBT SECURITIES

     Our subordinated debt securities will have a junior position to all of our
senior debt. Under the subordinated indentures, payment of the principal,
interest and any premium on the subordinated debt securities will generally be
subordinated and junior in right of payment to the prior payment in full of all
senior debt. The subordinated indentures may provide that no payment of
principal, interest or any premium on the subordinated debt securities may be
made in the event:

     - of any insolvency, bankruptcy or similar proceeding involving us or our
       property until we have paid holders of our senior debt in full; or

     - we fail to pay the principal, interest, any premium or any other amounts
       on any senior debt when due.

     Any subordinated debt securities offered pursuant to the subordinated
indentures will rank junior in right of payment to all senior debt.

     The subordinated indentures may prohibit us from making for a specified
time period any payment of principal of or premium, if any, or interest on, or
sinking fund requirements for, the subordinated debt securities during the
continuance of any default in respect of some senior debt, unless and until the
default on the senior debt is cured or waived.

     Upon any distribution of our assets in connection with any dissolution,
winding up, liquidation, reorganization, bankruptcy or other similar proceeding
relative to us, our creditors or our property, the holders of our senior debt
will first be entitled to receive payment in full of the principal thereof and
premium, if any, and interest due on the senior debt securities before the
holders of the subordinated debt securities are entitled to receive any payment
of the principal of and premium, if any, or interest on the subordinated debt
securities.

GLOBAL CERTIFICATES

     The debt securities of a series may be issued in whole or in part in the
form of one or more global certificates that will be deposited with a depository
identified in a prospectus supplement.

     The specific terms of the depository arrangements with respect to any debt
securities of a series will be described in a prospectus supplement.

     Unless otherwise specified in a prospectus supplement, debt securities
issued in the form of a global certificate to be deposited with a depository
will be represented by a global certificate registered in the name of the
depository or its nominee. Upon the issuance of a global certificate in
registered form, the depository for the global certificate will credit, on its
book-entry registration and transfer system, the respective principal amounts of
the debt securities represented by the global certificate to the accounts of
institutions that have accounts with the depository or its nominee. The
depository or its nominee are referred to in this prospectus as participants.
The accounts to be credited shall be designated by the underwriters or agents of
the debt securities, or by us if the debt securities are offered and sold
directly by us. Ownership of beneficial interests in a global certificate will
be limited to participants or persons that may hold interests through
participants. Ownership of beneficial interests by participants in a global
certificate will be shown on, and the transfer of that ownership interest will
be effected only through, records maintained by the depository or its nominee
for the global certificate. Ownership of beneficial interests in a global
certificate by persons that hold through participants will be shown on, and the
transfer of that ownership interest within a participant will be effected only
through, records maintained by that participant. The laws of some jurisdictions
require that some purchasers of securities take physical delivery

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<PAGE>   114

of their securities in definitive form. These limits and laws may impair your
ability to transfer beneficial interests in a global certificate.

     So long as the depository for a global certificate in registered form, or
its nominee, is the registered owner of the global certificate, the depository
or its nominee, as the case may be, will be considered the sole owner or holder
of the debt securities of the series represented by the global certificate for
all purposes under the indentures. Except as set forth below, owners of
beneficial interests in a global certificate will not be entitled to have debt
securities of the series represented by the global certificate registered in
their names, will not receive or be entitled to receive physical delivery of
debt securities in definitive form, and will not be considered the owners or
holders of the global certificate under the applicable indenture.

     Payment of principal of, premium, if any, and any interest on debt
securities of a series registered in the name of or held by a depository or its
nominee will be made to the depository or its nominee, as the case may be, as
the registered owner or the holder of a global certificate representing the debt
securities. None of us, the trustee, any paying agent, or the applicable debt
security registrar for the debt securities will have any responsibility or
liability for any aspect of the records relating to or payments made on account
of beneficial ownership interests in a global certificate for debt securities or
for maintaining, supervising or reviewing any records relating to beneficial
ownership interests.

     We expect that the depository for debt securities of a series, upon receipt
of any payment of principal, premium or interest in respect of a permanent
global certificate, will credit immediately participants' accounts with payments
in amounts proportionate to their respective beneficial interests in the
principal amount of the global certificate as shown on the records of the
depository. We also expect that payments by participants to owners of beneficial
interests in a global certificate held through those participants will be
governed by standing instructions and customary practices, as is now the case
with securities held for the accounts of customers in bearer form or registered
in street name, and those payments will be the responsibility of the
participants. However, we have no control over the practices of the depository
and/or the participants and there can be no assurance that these practices will
not be changed.

     Unless it is exchanged in whole or in part for debt securities in
definitive form, a global certificate may generally be transferred only as a
whole unless it is being transferred to particular nominees of the depository.

     Unless otherwise stated in any prospectus supplement, an institution to be
named in the applicable prospectus supplement will act as depository. Beneficial
interests in global certificates will be shown on, and transfers of global
certificates will be effected only through, records maintained by the depository
and its participants.

EVENTS OF DEFAULT

     Under the indentures an event of default, unless a prospectus supplement
provides otherwise, will mean any of the following:

     - failure to pay the principal or any premium on any debt security when
       due;

     - failure to deposit any sinking fund payment when due;

     - failure to pay interest on any debt security for 30 days;

     - failure to perform any other covenant in the indenture that continues for
       60 days after being given written notice;

     - some events involving our bankruptcy, insolvency or reorganization; or

     - any other event of default included in any indenture or supplemental
       indenture.

     An event of default for a particular series of debt securities will not
necessarily constitute an event of default for any other series of debt
securities issued under an indenture.
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<PAGE>   115

     If an event of default for any series of debt securities occurs and
continues, the trustee or the holders of at least 25% of the total principal
amount of the debt securities of the series may declare the entire principal of
that series due and payable immediately. If this happens, the holders of a
majority of the aggregate principal amount of the debt securities of that series
can waive certain past defaults and rescind and annul such acceleration, subject
to certain conditions.

     The indentures will limit the right to institute legal proceedings. No
holder of any debt securities will have the right to bring a claim under an
indenture unless:

     - the holder has given written notice of default to the trustee;

     - the holders of not less than 25% of the aggregate principal amount of
       debt securities of the series shall have made a written request to the
       trustee to bring the claim and furnished the trustee reasonable
       indemnification as the trustee may require;

     - the trustee has not commenced an action within 60 days of receipt of the
       notice and indemnification; and

     - no direction inconsistent with the request has been given to the trustee
       by the holders of not less than a majority of the aggregate principal
       amount of the debt securities of the series then outstanding.

Subject to applicable law and any applicable subordination provisions, the
holders of debt securities may enforce payment of the principal of or premium,
if any, or interest on their debt securities.

     The holders of a majority in aggregate principal amount of any series of
debt securities may direct the time, method and place of conducting any
proceeding for any remedy available to the trustee or exercising any power
conferred on the trustee, provided, however, that the trustee may decline to
follow the holders' direction if, being advised by counsel, the trustee
determines that the action is not lawful, or if the trustee in good faith
determines that the action would unduly prejudice the holders of the debt
securities not taking part in the action or would impose personal liability on
the trustee.

     Each indenture will provide that, in case an event of default in respect of
a particular series of debt securities has occurred, the trustee is to use the
degree of care of a prudent person in the conduct of such person's own affairs.
Subject to these provisions, the trustee is under no obligation to exercise any
of its rights or power under the indenture at the request of any of the holders
of the debt securities of any series unless they have furnished to the trustee
reasonable security or indemnity.

     We will be required to furnish to the trustee an annual statement as to our
fulfillment of all of our obligations under the relevant indenture.

DEFEASANCE

     We will be discharged from our obligations on the debt securities of any
series at any time we deposit with the trustee sufficient cash or government
securities to pay the principal, interest, any premium and any other sums due to
the stated maturity date or a redemption date of the debt securities of the
series. If this happens, the holders of the debt securities of the series will
not be entitled to the benefits of the indenture except for registration of
transfer and exchange of debt securities and replacement of destroyed, lost,
stolen or mutilated debt securities.

     We may only effect such a defeasance if, among other things, we have
delivered to the trustee either a ruling directed to the trustee from the
Internal Revenue Service or an opinion of counsel (as specified in the
indenture) to the effect that the holders of the debt securities will not
recognize income, gain or loss for Federal income tax purposes as a result of
the deposit and discharge and will be subject to Federal income tax on the same
amounts and in the same manner and at the same times as would have been the case
if the deposit and defeasance had not occurred.

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<PAGE>   116

CONSOLIDATION, MERGER OR SALE

     The indentures may limit or restrict our ability to consolidate or merge
with or into any other entity or sell all or substantially all of our assets.
These limitations or restrictions, if any, will be described in the applicable
prospectus supplement, and we expect that they generally will include that:

     - we are the continuing corporation or, if not, that any successor or
       purchaser is an entity organized under the laws of the United States of
       America or any State thereof, and that such entity expressly assumes our
       obligations on the debt securities under a supplemental indenture; and

     - immediately before and after giving effect to the transaction, no event
       of default shall exist and be continuing.

The remaining or acquiring entity will be substituted for us in the indentures
with the same effect as if it had been an original party to the indentures and
shall assume all of our responsibilities and liabilities under the indentures
including the payment of all amounts due on the debt securities and performance
of the covenants in the indentures. Thereafter, the successor entity may
exercise our rights and powers under any indenture, in our name or in its own
name. Any act or proceeding required or permitted to be done by our board of
directors or any of our officers may be done by the board or officers of the
successor entity.

MODIFICATION OF THE INDENTURES

     Under each indenture, we may modify our rights and obligations and the
rights of the holders with the consent of the holders of a majority in aggregate
principal amount of the outstanding debt securities of each series affected by
the modification. We cannot, however, modify the principal or interest payment
terms, or reduce the percentage required for modification, against any holder
without its consent. We may also enter into supplemental indentures with the
trustee, without obtaining the consent of the holders of any series of debt
securities, to cure any ambiguity or to correct or supplement any provision of
an indenture or any supplemental indenture which may be defective or
inconsistent with any other provision, to pledge any property to or with the
trustee or to make any other provisions with respect to matters or questions
arising under the indentures, provided that the action does not materially
adversely affect the interests of the holders of the debt securities. We may
also enter into supplemental indentures without the consent of holders of any
series of debt securities to set forth the terms of additional series of debt
securities, to evidence the succession of another person to our obligations
under the indenture or to add to our covenants.

CERTIFICATES AND OPINIONS TO BE FURNISHED TO TRUSTEE

     Each indenture will provide that, in addition to other certificates or
opinions that may be specifically required by other provisions of an indenture,
every time we ask the trustee to take action under the indenture, we must
provide a certificate of some of our officers and an opinion of counsel (who may
be our counsel) stating that, in the opinion of the signers, all conditions
precedent to the action have been complied with.

REPORT TO HOLDERS OF DEBT SECURITIES

     We will provide audited financial statements annually to holders of debt
securities. The trustee will be required to submit an annual report to the
holders of the debt securities regarding, among other things, the trustee's
eligibility to serve as trustee, the priority of the trustee's claims regarding
unpaid advances made by it, and any action taken by the trustee materially
affecting the debt securities.

THE TRUSTEE

     A prospectus supplement will name the trustee under the subordinated
indentures and the senior indentures.

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<PAGE>   117

     Pursuant to applicable provisions of the indentures and the Trust Indenture
Act of 1939 governing trustee conflicts of interest, an uncured event of default
with respect to any series of debt securities may force the trustee to resign as
trustee under either the subordinated indentures or the senior indentures. Any
resignation will require the appointment of a successor trustee under the
applicable indenture in accordance with the terms and conditions of such
indenture.

     The trustee may resign or be removed by us upon the occurrence of certain
events with respect to one or more series of debt securities and a successor
trustee may be appointed to act with respect to any series. The holders of a
majority in aggregate principal amount of the debt securities of any series may
remove the trustee with respect to the debt securities of that series.

GOVERNING LAW

     The indenture and the debt securities will be governed by and construed in
accordance with the laws of the State of New York.

                         DESCRIPTION OF PREFERRED STOCK

     We may issue, either separately or together with other securities, shares
of our preferred stock. See "Description of Outstanding Capital
Stock -- Preferred Stock." If we offer a series of preferred stock, we will
describe the particular terms and conditions of the series of preferred stock
offered in the prospectus supplement relating to that series of preferred stock.
The applicable prospectus supplement or prospectus supplements will describe the
following terms of each series of preferred stock being offered:

     - its title;

     - the number of shares offered, any liquidation preference per share and
       the purchase price;

     - any applicable dividend rate(s), period(s), and/or payment date(s) or
       method(s) of calculation;

     - if dividends apply whether they shall be cumulative or non-cumulative
       and, if cumulative, the date from which dividends shall accumulate;

     - any procedures for any auction and remarketing;

     - any provisions for a sinking fund;

     - any provisions for redemption;

     - any listing of such preferred stock on any securities exchange or market;

     - the terms and conditions, if applicable, upon which it will be
       convertible into common stock or another series of preferred stock of
       CapRock, including the conversion price (or manner of calculation
       thereof) and conversion period;

     - the terms and conditions, if applicable, upon which it will be
       exchangeable into debt securities of CapRock, including the exchange
       price (or manner of calculation thereof) and exchange period;

     - any voting rights;

     - a discussion of any applicable material and/or special Federal income tax
       considerations;

     - whether fractional interests in that series of preferred stock will be
       offered by entering into a deposit agreement that will be filed with the
       Securities and Exchange Commission which provides for a depositary to
       issue to the public receipts of depositary shares, each of which will
       represent ownership of and entitlement to all rights and preferences of a
       fractional interest in a share of preferred stock of a specified series;

     - its relative ranking and preferences as to any dividend rights and rights
       upon liquidation, dissolution or winding up of the affairs of CapRock;

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<PAGE>   118

     - any limitations on the future issuance of any class or series of
       preferred stock ranking senior to or on a parity with the series of
       preferred stock being offered as to dividend rights and rights upon
       liquidation, dissolution or winding up of the affairs of CapRock; and

     - any other specific terms, preferences, rights, limitations or
       restrictions.

                          DESCRIPTION OF COMMON STOCK

     We may issue, either separately or together with other securities, shares
of our common stock. Under our Articles of Incorporation, we are authorized to
issue up to 200,000,000 shares of our common stock. A prospectus supplement
relating to an offering of common stock, or other securities convertible or
exchangeable for, or exercisable into, common stock, will describe the relevant
terms, including the number of shares offered, any initial offering price, and
market price and dividend information, as well as, if applicable, information on
other related securities. See "Description of Outstanding Capital Stock" below.

                DESCRIPTION OF OUTSTANDING MATERIAL INDEBTEDNESS

     CapRock has outstanding $150.0 million of 1998 Senior Notes due 2008
bearing interest at the rate of 12% per annum and $210.0 million of 1999 Senior
Notes due 2009 bearing interest at the rate of 11 1/2% per annum. The 1998
Senior Notes and the 1999 Senior Notes are subject to the terms and conditions
of indentures between CapRock and Chase Manhattan Trust Company, National
Association (formerly known as PNC Bank, N.A.), as Trustee. The following
summary highlights some provisions of the indentures.

     The 1998 Senior Notes will mature on July 15, 2008. Interest on the 1998
Senior Notes is payable semiannually in cash on January 15 and July 15 of each
year, commencing January 15, 1999. The 1999 Senior Notes will mature on May 1,
2009. Interest on the 1999 Senior Notes is payable semiannually in cash on May 1
and November 1 of each year, commencing on November 1, 1999. The senior notes
are general senior unsecured obligations of CapRock, and as such, rank pari
passu in right of payment with all existing and future unsecured and
unsubordinated indebtedness of CapRock. The senior notes are effectively
subordinated in right of payment to all secured indebtedness of CapRock to the
extent of the value of the assets securing such indebtedness. In addition,
CapRock is a holding company, and the senior notes are effectively subordinated
to all existing and future indebtedness and other liabilities (including trade
payables) of CapRock's subsidiaries.

     The indentures contain covenants that, among other things, limit or
prohibit us from engaging in certain transactions including the following:

     - borrowing additional money,

     - paying dividends or making other distributions to our shareholders,

     - limiting the ability of subsidiaries to make payments to us,

     - making certain investments,

     - creating certain liens on our assets,

     - selling certain assets and using the proceeds from those sales for
       certain purposes,

     - entering into transactions with affiliates, and

     - engaging in certain mergers or consolidations.

     The events of default under the senior notes include various events of
default customary for such types of agreements including, among others, the
failure to pay principal and interest when due on the

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senior notes, cross-defaults on other indebtedness, certain judgments, and
certain events of bankruptcy, insolvency and reorganization.

                    DESCRIPTION OF OUTSTANDING CAPITAL STOCK

     The following summaries highlight certain provisions of our Articles of
Incorporation and By-Laws, as amended. Copies of our Articles and Bylaws are
available from us upon request. See "Where You Can Find More Information."

AUTHORIZED CAPITAL STOCK

     Under our Articles, the total number of shares of all classes of stock that
we have authority to issue is 220,000,000 shares. Each share has a par value of
$.01 per share. Of the authorized amount, 200,000,000 of the shares are common
stock and 20,000,000 are shares of preferred stock. As of March 31, 2000, there
were 33,440,856 shares of common stock issued and outstanding (and 52,151 shares
were held in treasury), and no shares of preferred stock were issued or
outstanding.

COMMON STOCK

     Each share of common stock has identical rights and privileges in every
respect. The holders of CapRock common stock are entitled to vote upon all
matters submitted to a vote of our shareholders and are entitled to one vote for
each share of common stock held.

     Subject to the prior rights and preferences, if any, applicable to shares
of preferred stock or any series of preferred stock, or the restrictions set
forth in any applicable indentures, the holders of common stock are entitled to
receive such dividends, payable in cash, stock or otherwise, as may be declared
by the Board out of any funds legally available for the payment of dividends.

     If CapRock voluntarily or involuntarily liquidates, dissolves or winds-up,
the holders of common stock will be entitled to receive after distribution in
full of the preferential amounts, if any, to be distributed to the holders of
preferred stock or any series of preferred stock, all of the remaining assets
available for distribution ratably in proportion to the number of shares of
common stock held by them.

     Holders of common stock will have no preferences or any preemptive,
conversion or exchange rights.

PREFERRED STOCK

     The Board is authorized to provide for the issuance of shares of CapRock
preferred stock in one or more series, and to fix for each series, voting
powers, full or limited, or no voting powers, and such designations, preferences
and relative, participating, optional or other special rights and such
qualifications, limitations or restrictions thereof as are shown in a resolution
providing for the issuance of such series adopted by the Board. The Board may
authorize the issuance of shares of preferred stock with terms and conditions
which could discourage a takeover or other transaction that holders of some or a
majority of shares of CapRock common stock might believe to be in their best
interests or in which such holders might receive a premium for their shares of
stock over the then-current market price of such shares. As of the date hereof,
no shares of preferred stock are outstanding.

PREEMPTIVE RIGHTS

     No holder of any shares of our stock has any preemptive or preferential
right to acquire or subscribe for any unissued shares of any class of stock or
any authorized securities convertible into or carrying any right, option or
warrant to subscribe for or acquire shares of any class of stock.

TRANSFER AGENT AND REGISTRAR

     The principal transfer agent and registrar for our common stock is
ChaseMellon Shareholder Services.

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<PAGE>   120

CERTAIN ANTI-TAKEOVER EFFECTS

     As of March 31, 2000, there were 166,506,993 authorized and unissued shares
of common stock and 20,000,000 authorized and unissued shares of preferred
stock. The Board of Directors can authorize the issuance of authorized but
unissued shares of its stock to render more difficult or to discourage an
attempt to obtain control of our company by means of a merger, tender offer,
proxy solicitation or otherwise. We are also subject to prior regulatory
approval by the FCC and various state regulatory agencies for a transfer of
control or for the assignment of our (or our subsidiaries') intrastate
certification authority, its international authority and other FCC licenses and
authorizations. The 1934 Communications Act generally limits direct foreign
ownership of wireless licenses to 20%, but provides for indirect foreign
ownership holdings above 25% upon FCC approval. In its order implementing the
U.S. commitment under the WTO Agreement, the FCC established new rules that
effectively relax the foreign ownership limits for common carrier wireless
licenses. Specifically, the new rules allow for up to 100% indirect ownership of
wireless licenses by foreign interests from countries that are members of the
WTO upon FCC review and approval from countries that have participated in the
WTO Agreement. Furthermore, the indentures for our 1998 Senior Notes and 1999
Senior Notes provide for a mandatory purchase of the senior notes upon a change
of control and we expect that any credit facilities that we enter into will
provide that an event of default or redemption event thereunder will occur if
all or a controlling interest in our capital stock is sold, assigned or
otherwise transferred. Any of the foregoing factors could have the effect of
delaying, deferring or preventing a change of control of CapRock. The Articles
provide that Article 13.03 of the Texas Business Corporation Act, which includes
statutory anti-takeover measures, will not apply to us.

WARRANTS AND REGISTRATION RIGHTS

     As part of its initial public offering, IWL Communications, one of our
predecessor companies, issued warrants to purchase up to 145,000 shares of IWL
Communications common stock at an exercise price of $7.20 per share to Roth
Capital Partners, Inc. (formerly known as Cruttenden Roth, Incorporated) or its
designees for nominal consideration, which, following our business combination
in August 1998, were converted on a one-to-one ratio to warrants to purchase
shares of our common stock. Roth Capital Partners exercised the warrants in
March 2000. Roth has certain demand and piggyback registration rights associated
with our common stock to be issued upon the exercise of the warrants.

                              SELLING SHAREHOLDERS

     The selling shareholders may be directors, executive officers, holders of
shares of our company or holders that may be considered to be selling securities
on our behalf or having purchased securities from us with a view towards
distributing them to others.

     The prospectus supplement relating to any shares of common stock offered by
the selling shareholders will set forth the names of the selling shareholders,
the number of shares of common stock being offered for each selling
shareholder's account as well as the number of such shares and the percentage,
if greater than one percent, to be owned by each selling shareholder after
completion of the offering.

     All expenses incurred with the registration of the shares of common stock
owned by the selling shareholders will be borne by CapRock, but CapRock will not
be obligated to pay any underwriting fees, discounts or commissions in
connection with such registration.

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<PAGE>   121

                              PLAN OF DISTRIBUTION

     We and any selling shareholders may sell any of the securities being
offered under this prospectus in any one or more of the following ways from time
to time:

     - through agents;

     - to or through underwriters;

     - through dealers; and

     - directly by CapRock and any selling shareholders to one or more
       purchasers.

     The distribution of the securities may be effected from time to time in one
or more transactions at a fixed price or prices, which may be changed, at market
prices prevailing at the time of sale, at prices related to such prevailing
market prices or at negotiated prices. Securities may also be offered or sold
through depositary receipts issued by a depositary institution.

AGENTS

     Offers to purchase securities may be solicited by agents designated by us
and/or any selling shareholders from time to time. Any agent involved in the
offer or sale of the securities under this prospectus will be named, and any
commissions payable by us to these agents will be set forth, in a related
prospectus supplement. Unless otherwise indicated in a prospectus supplement,
any agent will be acting on a reasonable best efforts basis for the period of
its appointment. Any agent may be deemed to be an underwriter, as that term is
defined in the Securities Act of 1933, as amended (the "Securities Act"), of the
securities so offered and sold.

UNDERWRITERS

     If securities are sold by us and/or any selling shareholders by means of an
underwritten offering, we and/or any selling shareholders, as applicable, will
execute an underwriting agreement with an underwriter or underwriters at the
time an agreement for such sale is reached, and the names of the specific
managing underwriter or underwriters, as well as any other underwriters, the
respective amounts underwritten and the terms of the transaction, including
commissions, discounts and any other compensation of the underwriters and
dealers, if any, will be set forth in a related prospectus supplement. That
prospectus supplement and this prospectus will be used by the underwriters to
make resales of the securities. If underwriters are used in the sale of any
securities in connection with this prospectus, those securities will be acquired
by the underwriters for their own account and may be resold from time to time in
one or more transactions, including negotiated transactions, at fixed public
offering prices or at varying prices determined by the underwriters and us at
the time of sale. Securities may be offered to the public either through
underwriting syndicates represented by managing underwriters or directly by one
or more underwriters. If any underwriter or underwriters are used in the sale of
securities, unless otherwise indicated in a related prospectus supplement, the
underwriting agreement will provide that the obligations of the underwriters are
subject to some conditions precedent and that with respect to a sale of these
securities the underwriters will be obligated to purchase all such securities if
any are purchased.

     We and/or any selling shareholders may grant to the underwriters options to
purchase additional securities to cover over-allotments, if any, at the initial
public offering price, with additional underwriting commissions or discounts, as
may be set forth in a related prospectus supplement. The terms of any over-
allotment option will be set forth in the prospectus supplement for those
securities.

DEALERS

     If a dealer is utilized by us and/or any selling shareholders in the sale
of the securities in respect of which this prospectus is delivered, we and/or
any selling shareholders, as applicable, will sell these securities to the
dealer as principal. The dealer may then resell such securities to the public at
varying prices to be determined by such dealer at the time of resale. Any such
dealer may be deemed to be an
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<PAGE>   122

underwriter, as such term is defined in the Securities Act, of the securities so
offered and sold. The name of the dealer and the terms of the transaction will
be set forth in the prospectus supplement relating to those offers and sales.

DIRECT SALES

     We and/or any selling shareholders may also sell offered securities
directly to institutional investors or others, who may be deemed to be
underwriters within the meaning of the Securities Act with respect to any resale
of those securities. The terms of any sales of this type will be described in
the prospectus supplement.

     Securities may also be offered and sold, if so indicated in the related
prospectus supplement, in connection with a remarketing upon their purchase, in
accordance with a redemption or repayment in connection with their terms, or
otherwise, by one or more firms "remarketing firms," acting as principals for
their own accounts or as agents for us and/or any selling shareholders. Any
remarketing firm will be identified and the terms of its agreement, if any, with
us and/or any selling shareholders and its compensation will be described in a
related prospectus supplement. Remarketing firms may be deemed to be
underwriters, as that term is defined in the Securities Act, in connection with
the securities remarketed by them.

DELAYED DELIVERY CONTRACTS

     If so indicated in a related prospectus supplement, we and/or any selling
shareholders may authorize agents and underwriters to solicit offers by certain
institutions to purchase securities from us and/or any selling shareholders at
the public offering price set forth in a related prospectus supplement as part
of delayed delivery contracts providing for payment and delivery on the date or
dates stated in a related prospectus supplement. Such delayed delivery contracts
will be subject to only those conditions set forth in a related prospectus
supplement. A commission indicated in a related prospectus supplement will be
paid to underwriters and agents soliciting purchases of securities pursuant to
delayed delivery contracts accepted by us and/or any selling shareholders, as
applicable.

GENERAL INFORMATION

     We and/or any selling shareholders may have agreements with the agents,
underwriters, dealers and remarketing firms to indemnify them against certain
civil liabilities, including liabilities under the Securities Act, or to
contribute with respect to payments that the agents, underwriters, dealers and
remarketing firms may be required to make.

     Each series of securities will be a new issue (other than shares of common
stock sold by selling shareholders or treasury shares sold by us) and, other
than the common stock, which is quoted on the Nasdaq National Market, may have
no established trading market. Unless otherwise specified in a related
prospectus supplement, we will not be obligated to list any series of securities
on an exchange or otherwise. We cannot assure you that there will be any
liquidity in the trading market for any of the securities.

     Agents, underwriters, dealers and remarketing firms may be customers of,
engage in transactions with, or perform services for, us, our subsidiaries
and/or any selling shareholders in the ordinary course of their businesses.

     The place, time of delivery and other terms of the sale of the offered
securities will be described in the applicable prospectus supplement.

     In order to comply with the securities laws of some states, if applicable,
the securities offered hereby will be sold in those jurisdictions only through
registered or licensed brokers or dealers. In addition, in some states
securities may not be sold unless they have been registered or qualified for
sale in the applicable state or an exemption from the registration or
qualification requirement is available and complied with.

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<PAGE>   123

                                 LEGAL MATTERS

     Munsch Hardt Kopf & Harr, P.C. will issue an opinion for us and the selling
shareholders, if any, about the legality of the offered securities. As of the
date of this prospectus, certain members of Munsch Hardt Kopf & Harr, P.C.
beneficially own, in the aggregate, 1,350 shares of our Common Stock. Any
additional required information regarding ownership of our securities by lawyers
of such firm will be contained in the applicable prospectus supplement. Any
underwriters will be advised about other issues relating to any offering by
their own legal counsel named in the applicable prospectus supplement.

                                    EXPERTS

     The consolidated financial statements of CapRock Communications Corp. as of
December 31, 1998 and 1999 and for each of the years in the three year period
ended December 31, 1999, as included in our Annual Report on Form 10-K for the
year ended December 31, 1999, have been incorporated by reference herein in
reliance upon the report of KPMG LLP, independent certified public accountants,
incorporated herein by reference, and upon the authority of said firm as experts
in accounting and auditing.

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<PAGE>   124

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                                4,500,000 SHARES

                          CAPROCK COMMUNICATIONS CORP.

                                  COMMON STOCK

                         [CAPROCK COMMUNICATIONS LOGO]

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

                             PROSPECTUS  SUPPLEMENT

                                 June 15, 2000

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

                              SALOMON SMITH BARNEY

                            BEAR, STEARNS & CO. INC.

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