APPLIED DIGITAL ACCESS INC
10-Q, 1998-08-14
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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<PAGE>
                                       
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                     FORM 10-Q

[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
ACT OF 1934
                                       
                 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1998

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
                                       
                        COMMISSION FILE NUMBER 000-23698

                          APPLIED DIGITAL ACCESS, INC.
             (Exact name of registrant as specified in its charter)
                                          
                DELAWARE                           68-0132939
     (State or other jurisdiction of    (IRS Employer Identification No.)
     incorporation or organization)
                                       
                9855 SCRANTON ROAD, SAN DIEGO, CALIFORNIA 92121
               (Address of principal executive offices, zip code)

                                 (619) 623-2200
                (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes [X] No [ ]

There were 12,704,148 shares of the registrant's Common Stock, $.001 par value,
outstanding as of July 31, 1998.


<PAGE>

                            APPLIED DIGITAL ACCESS, INC.

                                 INDEX TO FORM 10-Q
                                          
                                                                           PAGE
 PART I.      FINANCIAL INFORMATION                                          

 Item 1.      Financial Statements                                           

              Condensed Consolidated Balance Sheets at June 30, 1998    
              and December 31, 1997 ....................................    3

              Condensed Consolidated Statements of Operations for the        
              three and six months ended June 30, 1998 and              
              June 30, 1997 ............................................    4

              Condensed Consolidated Statements of Cash Flows for            
              the six months ended June 30, 1998 and June 30, 1997 .....    5

              Notes to Condensed Consolidated Financial Statements .....   6-7

 Item 2.      Management's Discussion and Analysis of Financial              
              Condition and Results of Operations ......................   8-11

              Risks and Uncertainties ..................................  12-17

 Item 3.      Quantitative and Qualitative Disclosures About Market     
              Risk .....................................................    17

 PART II.     OTHER INFORMATION                                              

 Item 1.      Legal Proceedings ........................................    18

 Item 2.      Changes in Securities and Use of Proceeds ................    18

 Item 3.      Defaults Upon Senior Securities ..........................    18

 Item 4.      Submission of Matters to a Vote of  Security Holders .....    18

 Item 5.      Other Information ........................................    18

 Item 6.      Exhibits and Reports on Form 8-K .........................    19

 SIGNATURES   ..........................................................    20









 2
<PAGE>
                                       
                                    PART I
                            FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS
                                       
                          APPLIED DIGITAL ACCESS, INC.
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                                  (Unaudited)
<TABLE>
<CAPTION>                                          
                                                   JUNE 30,        DECEMBER 31,
                                                     1998              1997     
                                                  ------------------------------
                                                       (DOLLARS IN THOUSANDS)
<S>                                                  <C>               <C>
 ASSETS
 Current assets:
    Cash and cash equivalents                        $  3,134          $  4,400
    Investments                                         9,876             8,779
    Accounts receivable, net                            9,003            12,981
    Inventory, net                                      5,924             5,859
    Deferred income taxes                                 130               130
    Prepaid expenses and other current assets           2,381             3,775
                                                      -------           -------
           Total current assets                        30,448            35,924

 Property and equipment, net                            6,260             6,165
 Deferred income taxes                                  1,426             1,372
 Other, net                                             1,753             2,822
                                                      -------           -------
                                                     $ 39,887          $ 46,283
                                                      -------           -------
                                                      -------           -------


 LIABILITIES AND SHAREHOLDERS' EQUITY
 Current liabilities:
    Accounts payable                                   $5,125            $3,478
    Acquisition payments due to licensor                   --               867
    Accrued expenses                                    1,255             1,997
    Accrued warranty                                    1,315             1,323
    Deferred revenue and other current liabilities      2,518             1,471
                                                      -------           -------
           Total current liabilities                   10,213             9,136

    Obligations under capital leases, net of
     current portion                                        5                15
                                                      -------           -------
           Total liabilities                           10,218             9,151
                                                      -------           -------

 Shareholders' equity:
  Preferred  stock,  $.001  par value, 7,500,000 
   shares authorized, no shares issued                  --                --
  Common  stock,  $.001  par  value, 30,000,000
    shares authorized, 12,704,148 and 12,605,082
    shares issued and outstanding at June 30,
    1998 and December 31, 1997, respectively           51,998            51,610
  Additional paid-in capital                            2,519             2,492
  Unrealized gain on investments                           72                84
  Accumulated deficit                                 (24,920)          (17,054)
                                                      -------           -------
           Total shareholders' equity                  29,669            37,132
                                                      -------           -------
                                                      $39,887           $46,283
                                                      -------           -------
                                                      -------           -------
</TABLE>

                 The accompanying notes are an integral part of the
                         consolidated financial statements.
                                          

<PAGE>
                                       
                         APPLIED DIGITAL ACCESS, INC.
               CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                               (Unaudited)

<TABLE>
<CAPTION>

                                                    FOR THE THREE MONTHS                           FOR THE SIX MONTHS
                                                       ENDED JUNE 30                                  ENDED JUNE 30
                                             ---------------------------------            ---------------------------------
                                                1998                   1997                   1998                   1997
                                             ---------              ----------            ----------             ----------
                                                    (AMOUNTS IN THOUSANDS                        (AMOUNTS IN THOUSANDS
                                                  EXCEPT PER SHARE AMOUNTS)                     EXCEPT PER SHARE AMOUNTS)
<S>                                           <C>                   <C>                   <C>                    <C>
 Revenue                                       $8,580                 $8,164                 $13,852                $14,552
 Cost of revenue                                3,741                  3,711                   7,405                  6,922
                                              -------                -------                 -------                -------
 Gross profit                                   4,839                  4,453                   6,447                  7,630

 Operating expenses:
     Research and development                   3,777                  2,534                   7,320                  4,535
     In-process research and
       development related to
       asset acquisition                           --                  1,578                      --                  1,578
     Sales and marketing                        2,551                  1,902                   4,831                  3,360
     General and administrative                 1,295                  1,082                   2,414                  2,437
                                              -------                -------                 -------                -------
 Total operating expenses                       7,623                  7,096                  14,565                 11,910
                                              -------                -------                 -------                -------

 Operating loss                                (2,784)                (2,643)                 (8,118)                (4,280)

 Interest income                                  168                    268                     342                    510
 Other income (expense), net                       (6)                    14                     (16)                    11
                                              -------                -------                 -------                -------

 Loss before income taxes                      (2,622)                (2,361)                 (7,792)                (3,759)

 Provision for income taxes                        36                     13                      73                     64
                                              -------                -------                 -------                -------

 Net loss                                     ($2,658)               ($2,374)                ($7,865)               ($3,823)
                                              -------                -------                 -------                -------
                                              -------                -------                 -------                -------

 Net loss per share                            ($0.21)                ($0.19)                 ($0.62)                ($0.31)
                                              -------                -------                 -------                -------
                                              -------                -------                 -------                -------

 Number of shares used in per share
     computations                              12,675                 12,452                  12,650                 12,381

 Comprehensive Loss                           ($2,751)               ($2,344)                ($7,877)               ($3,809)
                                              -------                -------                 -------                -------
                                              -------                -------                 -------                -------
</TABLE>

                 The accompanying notes are an integral part of the
                         consolidated financial statements.


4

<PAGE>
                                       
                            APPLIED DIGITAL ACCESS, INC.
                  CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    (Unaudited)
                                          
<TABLE>
<CAPTION>
                                                         FOR THE SIX MONTHS
                                                           ENDED JUNE 30,
                                                       ----------------------
                                                        1998          1997
                                                       ----------------------
                                                       (DOLLARS IN THOUSANDS)
<S>                                                    <C>             <C>
 Cash flows from operating activities:
    Net loss                                            ($7,865)        ($3,823)
    Adjustments to reconcile net loss to net
      cash provided (used) by operating activities:
      In-process research and development related to
      asset acquisition                                      --           1,578
      Depreciation and amortization                       1,853           1,335
      Other                                                (101)           (116)
    Changes in assets and liabilities:
      Accounts receivable                                 3,978          (2,893)
      Inventory                                             (65)            256
      Prepaid expenses and other current assets           1,394            (114)
      Deferred income taxes                                 (54)             --
      Accounts payable                                    1,647           1,992
      Acquisition payments due licensor                    (867)          2,600
      Accrued expenses                                     (743)             64
      Accrued warranty                                       (8)            (24)
      Deferred revenue                                    1,047             393
                                                       --------         --------
      Net cash provided by operating activities             216           1,248
                                                       --------         --------
 Cash flows from investing activities:
    Purchases of investments                             (7,854)         (9,778)
    Maturities of investments                             6,835          14,017
    Purchases of property and equipment                  (1,370)           (826)
    Purchase costs related to asset acquisitions            500          (3,383)
                                                       --------         --------
        Net cash provided (used) by investing            
         activities                                      (1,889)             30
                                                       --------         --------
 Cash flows from financing activities:
    Principal payments on capital leases                     (9)             (8)
    Proceeds from the issuance of common
     stock under stock option plans                         416             447
                                                       --------         --------
      Net cash provided by financing activities             407             439
                                                       --------         --------
      Net increase(decrease) in cash and 
       cash equivalents                                  (1,266)          1,717
                                                       --------         --------
    Cash and cash equivalents, beginning of period        4,400           1,504

    Cash and cash equivalents, end of period             $3,134          $3,221
                                                       --------         --------
</TABLE>
                                       
                 The accompanying notes are an integral part of the
                         consolidated financial statements.
                                          


<PAGE>                                          
                            APPLIED DIGITAL ACCESS, INC.

                Notes to Condensed Consolidated Financial Statements
                                   June 30, 1998
                                    (Unaudited)

1.   Basis of Presentation

     The accompanying unaudited condensed consolidated financial statements 
     include the accounts of Applied Digital Access, Inc. (the "Company" or 
     "ADA") and its wholly owned subsidiary: Applied Digital Access - Canada, 
     Inc. All significant intercompany balances and transactions have been  
     eliminated in consolidation. These financial statements have been 
     prepared in accordance with the interim reporting requirements of Form 
     10-Q, pursuant to the rules and regulations of the Securities and 
     Exchange Commission ("SEC"). 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 of only normal 
     recurring adjustments) considered necessary for a fair presentation have 
     been included. Operating results for the three and six month periods 
     ended June 30, 1998 are not necessarily indicative of the results that 
     may be expected for the year ending December 31, 1998. These financial 
     statements should be read in conjunction with the Company's audited 
     financial statements and notes thereto, together with Management's 
     Discussion and Analysis of Financial Condition and Results of 
     Operations, and Risks and Uncertainties, contained in the Company's 
     Annual Report on Form 10-K for the fiscal year ended December 31, 1997 
     filed with the SEC.

2.   New Accounting Pronouncements

     The Company has adopted the provisions of Statement of Financial 
     Accounting Standards No. 130, "Reporting of Comprehensive Income," 
     effective January 1, 1998. This statement requires the disclosure of 
     comprehensive income and its components in a full set of 
     general-purpose financial statements.  Comprehensive income is defined 
     as net income plus revenues, expenses, gains and losses that, under 
     generally accepted accounting principles, are excluded from net income. 
     The components of comprehensive income, which are excluded from net 
     income are foreign currency gains/losses and unrealized gains/losses on 
     securities and have been included in the calculation of comprehensive 
     income.

     In June 1997, the Financial Accounting Standards Board issued Statement
     of Financial Accounting Standards No. 131, "Disclosures about Segments of
     an Enterprise and Related Information" ("SFAS 131"), which supersedes 
     Statement of Financial Accounting Standards, "Financial Reporting of 
     Segments of a Business Enterprise" ("SFAS 14"). SFAS 131 changes current 
     practice under SFAS 14 by establishing a new framework on which to base 
     segment reporting and also requires interim reporting of segments 
     information. This statement is effective for fiscal years beginning after 
     December 15, 1997. This statement's interim reporting disclosures are not 
     required until the first quarter immediately subsequent to the fiscal year 
     in which SFAS 131 is effective.
        
3.   Inventory

     Inventory is valued at the lower of cost (determined using the first-in,
     first-out method) or market. Inventory was as follows:
<TABLE>
<CAPTION>
                                         JUNE 30,             DECEMBER 31,
                                           1998                   1997
                                       ------------           ------------
                                              (DOLLARS IN THOUSANDS)
           <S>                         <C>                    <C>
           Raw materials                 $3,703                  $3,419
           Work-in-process                2,021                   2,223
           Finished goods                   660                     787
                                         ------                  ------
                                          6,384                   6,429
           Less inventory reserve          (460)                   (570)
                                         ------                  ------
                                         $5,924                  $5,859
                                         ------                  ------
                                         ------                  ------
</TABLE>
6
<PAGE>

4.   Per Share Information

     The Company has adopted the provisions of Statement of Financial 
     Accounting Standards No. 128, "Earnings per Share" ("SFAS 128"), 
     effective December 31, 1997. SFAS 128 requires the presentation of basic 
     and diluted earnings per share. Basic EPS is computed by dividing income 
     available to common stockholders by the weighted average number of 
     common shares outstanding for the period. Diluted EPS is computed giving 
     effect to all dilutive potential common shares that were outstanding 
     during the period. Dilutive potential common shares consist of the 
     incremental common shares issuable upon the conversion of convertible 
     preferred stock (using the "if converted") method and exercise of stock 
     options and warrants for all periods. All prior period earnings per 
     share amounts have been restated to comply with SFAS 128.

     In accordance with the disclosure requirements of SFAS 128, a 
     reconciliation of the numerator and denominator of basic and diluted EPS is
     provided as follows (dollars in thousands, except per share amounts).

<TABLE>
<CAPTION>

                                        Three Months Ended  June 30,   Six Months  Ended  June 30,
                                        ----------------------------   ---------------------------
                                           1998               1997         1998           1997
                                           ----               ----         ----           ----

<S>                                       <C>               <C>            <C>            <C>
           
 Numerator - basis and diluted EPS:
   Net Loss                              $(2,658)           $(2,374)     $(7,865)       $(3,823)
 Denominator - basic and diluted EPS:
   Weighted Average common stock          12,675             12,452       12,650         12,381
     outstanding
 Basic and diluted earnings per share     $(0.21)            $(0.19)      $(0.62)        $(0.31)

</TABLE>








7



<PAGE>

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF  FINANCIAL CONDITION AND
RESULTS OF OPERATIONS

THE STATEMENTS CONTAINED IN THIS FORM 10-Q THAT ARE NOT PURELY HISTORICAL ARE 
FORWARD LOOKING STATEMENT.  STATEMENTS WHICH USE THE WORDS "SEEK," "INTEND," 
"WILL," "ANTICIPATE," "CAN," "CONTINUE," AND "EXPECT" ARE FORWARD LOOKING 
STATEMENTS.  THESE FORWARD LOOKING STATEMENTS, INCLUDING STATEMENTS REGARDING 
THE COMPANY'S (I) PLANS FOR DEVELOPMENT OR ACQUISITION OF NEW PRODUCTS OR 
ENHANCEMENT OF EXISTING PRODUCTS, (II) STRATEGY AND (III) EXPANDED SALES AND 
MARKETING EFFORTS, ARE BASED ON INFORMATION AVAILABLE TO THE COMPANY AS OF 
THE DATE HEREOF, AND THE COMPANY ASSUMES NO OBLIGATION TO UPDATE ANY SUCH 
FORWARD LOOKING STATEMENT.  IT IS IMPORTANT TO NOTE THAT THE COMPANY'S ACTUAL 
RESULTS COULD DIFFER MATERIALLY FROM THOSE IN SUCH FORWARD LOOKING 
STATEMENTS. AMONG THE FACTORS THAT COULD CAUSE ACTUAL RESULTS TO DIFFER 
MATERIALLY ARE THE FACTORS SET FORTH BELOW UNDER THE HEADING "RISKS AND 
UNCERTAINTIES."

The following should be read in conjunction with "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and "Risks and
Uncertainties", contained in the Company's Annual Report on Form 10-K for the
fiscal year ended December 31, 1997 filed with the Securities and Exchange
Commission.

OVERVIEW

ADA is a leading provider of network performance management products  that 
include systems, software, and services used to manage the quality, 
performance, availability and reliability of telecommunications service 
providers' ("TSP") networks.  ADA's products are designed to enable TSPs to 
improve their quality of service, to increase productivity, to lower 
operating expenses and to effectively deploy new services.  ADA has 
positioned its business to assist TSPs in addressing the rapidly increasing 
demand for new services, higher bandwidth and access to the Internet.  ADA's 
systems and software provide network management functions such as circuit 
provisioning, network configuration management, network performance 
management, circuit testing, and traffic management of the public switched 
network. ADA has addressed the industry demand for network management 
products with a three-faceted approach: (1) network systems that provide 
testing and performance monitoring functions as well as selected transport 
functions; (2) network management software that enables TSPs to manage their 
network operations; and (3) services that are customized to meet the evolving 
needs of the Company's TSP market. The Company has two business units: the 
Network Systems business unit and the Network Management business unit. The 
business units are the result of the evolution of the Company from a single 
product line to multiple product lines. The Network Systems business unit is 
built around the Company's test and performance management products and 
services, including its T3AS Test and Performance Monitoring System ("T3AS"), 
Centralized Test System ("CTS"), Remote Module, a DS1 network interface unit 
("NIU"), and Protocol Analysis Access System ("PAAS"). The Network Management 
business unit focuses on Operations Systems ("OS") software products, 
including .Provisioner, Test OS, Graphical Test Assistant ("GTA"), 
Sectionalizer, Fault Management System ("FMS"), Traffic Data Collection and 
Engineering System ("TDC&E"), and OS design services. 

RESULTS OF OPERATIONS 

Revenue totaled $8,580,000 for the three months ended June 30, 1998, a 5% 
increase from revenue of $8,164,000 for the three months ended June 30, 1997. 
The increase for the quarter was primarily the result of increased sales of 
the Company's network systems test and performance management products 
partially offset by decreases sales of the Company's network management OS 
design services.  Revenue from the Company's network systems test and 
performance management products for the three months ended June 30, 1998 
totaled $5,014,000, a 13% increase from $4,430,000 in the same period last 
year.  Increased sales of the Company's Remote Module and T3AS products 
accounted for the majority of the increase.  Revenue from network management 
OS software products and services for the three months ended June 30, 1998 
totaled $3,566,000, a 4% decrease from $3,734,000 in the same period last 
year.  The decrease resulted from decreased sales of the Company's OS design 
services to Northern Telecom, Ltd. ("Northern Telecom") substantially offset 
by increased sales of the Company's .Provisioner, TDC&E and Test OS software 
products.  The decreased revenue from OS design services resulted from the 
Company's acquisition of an exclusive license to Northern Telecom's DSS II 
software product in June 1997.  Prior to the acquisition, the Company 
provided OS design services to Northern Telecom that supported the DSS II 
product.  As a result of the acquisition, the Company's OS design services 
business supporting DSS II shifted to a product-based business. The Company 
now markets and supports the DSS II product and technology under the new name 
 .Provisioner.  Unlike revenue from OS software design services which is 
recognized as the service is performed, revenue from OS software product 
sales requires the satisfaction of specific delivery and acceptance criteria 
prior to revenue recognition.  As a result, the Company has experienced and 
may in the future continue to experience increased quarterly revenue 
fluctuations that could have a material adverse affect on the Company's 
business, operating results and financial condition.  See "Risks and 
Uncertainties -- Fluctuations in Quarterly Operating Results; History of 
Losses".  

Revenue for the six months ended June 30, 1998 totaled $13,852,000, a 5% 
decrease from 

8
<PAGE>

$14,552,000 in the same period last year.  The decrease for the six months 
ended June 30, 1998 is a result of decreased revenue from the Company's 
network management OS software design services substantially offset by 
increased sales of the Company's network systems test and performance 
management products.  Revenue from the Company's network systems test and 
performance management products for the six months ended June 30, 1998 
totaled $8,131,000, a 13% increase from $7,189,000 in the same period last 
year.  The majority of the increase resulted from increased sales of the 
Company's Remote Module product partially offset by decreased sales of the 
Company's CTS product.  Revenue from network management OS software products 
and services for the six months ended June 30, 1998 totaled $5,721,000, a 22% 
decrease from $7,363,000 in the same period last year.  The decrease for the 
six month period ended June 30, 1998 was the result of the same reasons 
discussed above for the three month period ended June 30, 1998.

The Company believes that revenue for the six months ended June 30, 1998 was 
also negatively impacted by customer order delays resulting from prolonged 
contract negotiations with a current RBOC customer for the Company's T3AS, 
CTS and Remote Module products.  There can be no assurances that customer 
order delays will not continue in the future, each of which could have a 
material adverse effect on the Company's business, operating results and 
financial condition.  See "Risks and Uncertainties -- Fluctuations in 
Quarterly Operating Results; History of Losses" and "-- Concentration of 
Major Customers; Telephone Company Qualification Requirements." 

Gross profit totaled $4,839,000 for the three months ended June 30, 1998, a 
9% increase from $4,453,000 in the same period last year. Gross profit as a 
percent of revenue was 56.4% for the three months ended June 30, 1998 
compared to 54.5% for the three months ended June 30, 1997.  The increase in 
gross profit was primarily the result of a shift in the majority of the 
Company's OS software design services business to an OS software 
product-based business and increased revenue.  As a result of the 
 .Provisioner (formerly DSS II) license acquisition, a majority of engineering 
labor previously associated with OS design services revenue shifted from the 
cost of revenue line to research and development operating expenses 
supporting OS software product development.  In addition, the Company's 
relatively fixed manufacturing overhead costs allocated over greater revenue 
levels in the second quarter of 1998 resulted in increased overall gross 
profit levels.  The increase in gross profit as a percent of revenue resulted 
from the factors discussed above partially offset by increased sales of the 
Company's Remote Module NIU product which carries a lower gross profit margin 
than the Company's OS software, CTS and T3AS products.  The highly 
competitive NIU market is subject to severe pricing pressures which have 
contributed to significantly lower overall gross profits on this product.

Gross profit totaled $6,447,000 for the six months ended June 30, 1998, a 16% 
decrease from $7,630,000 in the same period last year.  Gross profit as a 
percent of revenue was 46.5% for the six months ended June 30, 1998 compared 
to 52.4% in the same period last year.  The decrease in gross profit was the 
result of a product mix weighted toward the Company's lower-margin Remote 
Module NIU product (described in the previous paragraph), decreased revenue 
and the impact of a $378,000 one-time inventory obsolescence charge in the 
first quarter of 1998.  The Company's relatively fixed manufacturing overhead 
costs allocated over lower revenue levels in the first half of 1998 resulted 
in lower overall gross profit levels.  The net decrease in gross profit as a 
percent of revenue resulted from the factors discussed above substantially 
offset by the shift in the Company's OS software design services business to 
an OS software product-based business (described in the previous paragraph).  
There can be no assurance that the Company will be able to maintain current 
gross profit or gross profit as a percent of revenue levels.  Factors which 
may materially and adversely affect the Company's gross profit in the future 
include its level of revenue, competitive pricing pressure in the 
telecommunication network management market, fluctuations in quarterly order 
bookings and revenue, new product introductions by the Company or its 
competitors, potential inventory obsolescence and scrap, possible recalls, 
production or quality problems, timing of development expenditures, changes 
in material cost, disruptions in sources of supply, regulatory changes, 
capital spending, and changes in general economic conditions. 

Research and development expenses totaled $3,777,000 for the three months 
ended June 30, 1998, a 49% increase from $2,534,000 for the three months 
ended June 30, 1997.  Research and development expenses totaled $7,320,000 
for the six months ended June 30, 1998, a 61% increase from $4,535,000 for 
the six months ended June 30, 1997. The majority of the increase for the 
three and six months ended June 30, 1998 was due to the shift in engineering 
labor from cost of revenue to research and development operating expenses as 
a result of the .Provisioner license acquisition discussed above in the gross 
profit analysis and the addition of research and development personnel to 
support the Joint Development Agreement ("JDA") with Northern Telecom Inc. 
("Nortel") and increased non-recurring engineering expenses related to the 
JDA and other product developments.  In September 1997, the Company entered 
into the JDA with Nortel to develop unique synchronous optical network 
("SONET") products for the telecommunications industry. Nortel and ADA both 
contribute technology and development resources to projects conducted under 
the JDA and equally share the development costs. For the three and six months 
ended June 30, 1998, the Company's research and development expenses include 
a $1 million and $1.7 million reduction, respectively, representing Nortel's 
proportionate share of development costs incurred under the initial project 
being conducted under the JDA. The Company believes that its future success 
depends on its ability to maintain its technological leadership through 
enhancement of its existing products and development of innovative new 
products and services that meet customer needs. Therefore, the Company 
intends to continue to make significant investments in research and product 
development in association with planned development projects.

9

<PAGE>

In the three and six months ended June 30, 1997 the Company recorded a charge of
approximately $1.6 million for purchased research and development costs related
to the acquisition of the .Provisioner license and related assets from Northern
Telecom. 

Sales and marketing expenses totaled $2,551,000 for the three months ended June
30, 1998, a 34% increase from $1,902,000 for the three months ended June 30,
1997.  Sales and marketing expenses totaled $4,831,000 for the six months ended
June 30, 1998, a 44% increase from $3,360,000 for the six months ended June 30,
1997.  The majority of the increases for the three and six months is the result
of increased staff in sales to support increased sales efforts and new customer
accounts and increased personnel costs in technical support and marketing to
support the shift of a majority of the Company's OS design services business to
an OS software product-based business.  The Company expects that sales and
marketing expenses will continue to increase in absolute dollars as the Company
continues to hire additional sales, marketing and technical support personnel to
support both current products and planned product introductions. 

General and administrative expenses totaled $1,295,000 for the three months
ended June 30, 1998, a 20% increase from $1,082,000 for the three months ended
June 30, 1997.  General and administrative expenses totaled $2,414,000 for the
six months ended June 30, 1998, a 1% decrease from $2,437,000 for the six months
ended June 30, 1997.  The majority of the increase for the three months ended
June 30, 1998 resulted from increased expense related to the amortization of
intangible assets associated with the .Provisioner license acquisition that
occurred in June 1997 and increased legal expenses related to general
administrative issues.  The majority of the decrease for the six months ended
June 30, 1998 resulted from lower consulting and recruiting costs offset by
increased expenses for the amortization of intangible assets and increased legal
expenses.  The Company expects that general and administrative expenses will
increase in absolute dollars in the future as the Company expands its internal
networking capabilities to support the integration of its geographically
distributed organization. 

Interest income totaled $168,000 for the three months ended June 30, 1998, a 
37% decrease from $268,000 in the same quarter a year ago. Interest income 
totaled $342,000 for the six months ended June 30, 1998, a 33% decrease from 
$510,000 for the six months ended June 30, 1997.  The decreases resulted from 
decreased levels of cash investments compared to the same periods last year. 

For the three and six months ended June 30, 1998 and June 30, 1997, the Company
provided for income taxes related to the operations of the Company's Canadian
subsidiary, based on an annual effective Canadian tax rate of 46%. The Company
did not provide for U.S. income taxes for the three or six months ended June 30,
1998 or June 30, 1997 due to net losses.  The Company expects to provide for
foreign, federal and state income taxes for 1998 at applicable statutory rates,
after giving effect to net operating losses, remaining available net operating
loss carryforwards, and any available tax credits. 

As a result of the factors discussed above, the Company incurred a net loss 
of $2,658,000, or $.21 per basic and diluted share, for the three months 
ended June 30, 1998 compared to a net loss of $2,374,000, or $.19 per basic 
and diluted share, for the three months ended June 30, 1997.  The Company 
incurred a net loss of $7,865,000, or $.62 per basic and diluted share, for 
the six months ended June 30, 1998 compared to a net loss of $3,823,000, or 
$.31 per basic and diluted share, for the six months ended June 30, 1997.  
Excluding the above referenced $1.6 million charge for purchased research and 
development associated with the .Provisioner license acquisition, the Company 
would have incurred a net loss of $796,000, or $.06 per share, for the three 
months ended June 30, 1997 and a net loss of $2,245,000, or $.18 per share, 
for the six months ended June 30, 1997.

LIQUIDITY AND CAPITAL RESOURCES 

At June 30, 1998 the Company had approximately $13,010,000 in cash and
investments, compared to $13,179,000 at December 31, 1997, a decrease of
$169,000.  The decrease in cash and investments was primarily the result of net
operating losses and, to a lesser extent, purchases of capital equipment. 

Working capital totaled $20,235,000 at June 30, 1998, a decrease of $6,553,000
from $26,788,000 at December 31, 1997.  The decrease in working capital was
primarily the result of net operating losses, decreased accounts receivable and
other current assets as well as an increase in accounts payable and other
current liabilities. 

For the six months ended June 30, 1998 the Company's operating activities
provided $216,000 in cash, primarily the result of decreased accounts receivable
and other current assets and increased accounts payable and other current
liabilities significantly offset by net operating losses. 

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For the six months ended June 30, 1998 cash used for capital expenditures 
totaled approximately $1,370,000.  Most of the capital equipment additions 
were for software tool kits, computer workstations and lab equipment related 
to the Company's expanded research and development efforts and the 
Richardson, Texas office moving to a new location. The Company expects the 
level of capital expenditures will increase in 1998 as a result of 
investments in research and development projects. 

Assuming no material changes in the Company's current operating plans, the
Company believes that cash generated from operations, and the total of its cash
and investments, will be sufficient to meet its working capital and capital
expenditure requirements for at least the next twelve months. However, the
Company may seek additional capital resources to meet working capital and
capital expenditure requirements.  Additionally, significant additional capital
resources may be required to fund acquisitions of complementary businesses,
products or technologies.  The Company may need to issue additional shares of
its capital stock or incur indebtedness in connection with any such acquisitions
or future operations.  At present, the Company does not have any agreements or
commitments with respect to any such acquisitions. 

The Company believes the impact of inflation on its business activities has not
been significant to date.






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RISKS AND UNCERTAINTIES

FLUCTUATIONS IN QUARTERLY OPERATING RESULTS; HISTORY OF LOSSES.  The Company has
experienced significant fluctuations in bookings, revenue and operating results
from quarter to quarter due to a combination of factors and expects such
fluctuations to continue in future periods. Factors that may cause the Company's
results of operations to vary significantly from quarter to quarter include but
are not limited to the size and timing of customer orders and subsequent
shipment of systems products and implementation of OS software products to major
customers, timing and market acceptance of product introductions or enhancements
by the Company or its competitors, customer order deferrals in anticipation of
new products, technological changes in the telecommunications industry,
competitive pricing pressures, changes in the Company's operating expenses,
personnel changes, management of a changing business, changes in the mix of
products sold and licensed, disruption in sources of supply, changes in pricing
policies by the Company's suppliers, regulatory changes, capital spending,
delays of payments by customers and general economic conditions. The Company
believes that in late 1997 it began experiencing seasonality in its product
shipments and OS software licensing. Generally, TSPs place more orders for
products and licenses in the second and fourth quarters, with the orders
significantly down in the first quarter and relatively flat in the third quarter
of each year. The Company expects that revenue may begin to reflect these
seasonal order cycles more closely, which could result in quarterly
fluctuations. There can be no assurance that the TSPs will not defer or delay
orders contrary to the historical seasonal pattern or that they will not change
their ordering patterns. Because of the relatively fixed nature of most of the
Company's costs, including personnel and facilities costs, any unanticipated
shortfall in revenue in any fiscal quarter would have a proportionately greater
impact on the Company's operating income in that quarter and may result in
fluctuations in the price of the Company's Common Stock. 

As the impact of the Company's Network Management business unit on the Company's
revenue increases, the Company may be faced with greater fluctuations in
operating income. The licensing and implementation of the Company's OS products
generally involves a significant capital expenditure and a commitment of
resources by prospective customers. Accordingly, the Company is dependent on its
customers' decisions as to the timing and level of commitment and expenditures.
In addition, the Company typically realizes a significant portion of license
revenues in the last weeks or even days of a quarter. As a result, the magnitude
of quarterly fluctuations in the Network Management business unit may not become
evident until late in, or after the close of, a particular quarter. In addition,
the Company does not recognize service revenues until the services are rendered.
The time required to implement the Company's OS products can vary significantly
with the needs of its customers and is generally a process that extends for
several months. Because of their complexity, larger implementations may take
multiple quarters to complete. Additionally, quarter-to-quarter product mix
variations, customer orders tending to be placed late in the quarter, and
competitive pressures on pricing could have a materially adverse effect on the
Company's operating results in any one quarter. The Company's expenses are based
in part on the Company's expectations as to future revenues and to a large
extent are fixed in the short term. If revenues do not meet expectations, the
Company's business, operations and financial condition are likely to be
materially adversely affected. The Company has experienced losses in the past
and there can be no assurance that the Company will not experience losses in the
future. 

COMPETITION.  Competition in the Company's markets is intense and is 
characterized by rapidly changing technologies, conformance with evolving 
industry standards, frequent new product introductions and enhancements, 
rapid changes in customer requirements, and price-competitive bidding.  To 
maintain and improve its competitive position, the Company must continue to 
develop and introduce, in a timely and cost-effective manner, new products 
and features that keep pace with increasing customer requirements.  The 
Company expects competition in its markets to increase from existing 
competitors and from other companies which may enter the Company's current or 
future markets. The Company believes the principal competitive factors 
affecting the market for its network systems test and performance monitoring 
products are product features, price, conformance with BellCore and other 
industry transmission standards and specifications, performance and 
reliability, technical support, and the maintenance of close working 
relationships with customers.  The Company's network systems products, 
especially CTS and Remote Module, are currently focused in highly competitive 
market niches. The environment for CTS and Remote Module is fiercely 
competitive with respect to price, product features, established 
customer-supplier relationships and conformance with industry standards.  The 
Company believes the current competitors that provide partial solutions to 
either performance monitoring or testing of the DS3, and the DS1 and DS0 
circuits that make up the DS3 circuit, include Hekimian Laboratories, Inc., 
Telecommunications Techniques Corporation, Anritsu Wiltron Corporation and 
some of the manufacturers of large transmission equipment and digital 
cross-connect test and performance monitoring equipment such as Lucent 
Technologies, Inc. ("Lucent"), Alcatel Data Networks, Ericsson Communication 
Inc. ("Ericsson"), ADC Telecommunications, and Tellabs, Inc. The Company's 
Remote Module product addresses the DS1 NIU market in which current 
competitors include Westell Inc., Teltrend Inc., and Troncom, Inc.  Many of 
these competitors have significantly greater technical, financial, 
manufacturing, and marketing resources than the Company.  In addition, in 
1997, ANSI adopted certain of the Company's technology as an industry 
standard.  As a result, the Company is obligated to grant licenses of this 
technology to third parties, including competitors, on fair and equitable 
terms and thus, also faces competition from the licensees of its own 
technology. 

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The Company believes there are an increasing number of current competitors in
the network management OS market that provide network management OS applications
for circuit and services provisioning and services management, testing and test
management, fault and alarm management and surveillance, network and circuit
performance monitoring and traffic management telecommunications functions. The
OS market is characterized by a wide range of companies that have varying
degrees of market influence. The nature of the network management OS market is
such that improved technologies and tool sets have made the barriers to entry in
this market relatively small resulting in fierce competition. The principal
competitive factors affecting the Company's network management OS products
include product quality, performance, price, customer support, corporate
reputation, and product features such as scalability, interoperability,
functionality and ease of use. The Company's existing and potential competitors
offer a variety of solutions to address network management needs. Competitors
include suppliers of standard off-the-shelf products, custom software
developers, large telecommunications equipment vendors that offer software
applications to manage their own and other suppliers' equipment, such as Lucent,
Northern Telecom, Inc., Fujitsu, and Ericsson, hardware and software vendors,
including IBM, Sun Microsystems and Hewlett Packard, and providers of specific
network management and OS applications, such as BellCore, Objective Systems
Integrators, Inc., TCSI Corporation, Architel Systems Corporation and others.
Additionally, many of the Company's existing and potential customers
continuously evaluate whether they should develop their own network management
and OS applications or license them from outside vendors. The Company expects
competition in the OS market to increase significantly in the future.
Additionally, several of the Company's competitors have long-established
relationships with the Company's current and prospective  customers which may
adversely affect the Company's ability to successfully compete for business with
these customers. In addition, product price reductions resulting from market
share penetration initiatives or competitive pricing pressures could have a
material and adverse effect on the Company's business, operating results, and
financial condition. There can be no assurance that the Company will have the
financial resources, technical expertise or manufacturing, marketing,
distribution and support capabilities to compete successfully in the future. 

CONCENTRATION OF MAJOR CUSTOMERS; TELEPHONE COMPANY QUALIFICATION REQUIREMENTS.
The market for the Company's products and services currently consists of the
five regional Bell operating companies ("RBOCs"), long distance or
"interexchange carriers" ("IXCs"), local exchange carriers ("LECs"), competitive
local exchange carriers ("CLECs"), competitive access providers ("CAPs"),
Internet service providers ("ISPs"), enterprise networks and other TSPs.
Historically, the Company's marketing efforts focused primarily on the RBOCs,
which accounted for approximately 99%, 73%, 31%, and 50% of the Company's total
revenue in 1995, 1996, 1997, and the first six months of 1998, respectively.
However, the Company's strategy has been to focus its efforts on diversifying
its customer base. RBOCs, IXCs and enterprise customers accounted for 31%, 27%
and 20% of the Company's total revenue in 1997, and 50%, 35% and 0% of the
Company's total revenue for the first six months of 1998. The increased customer
base is primarily a function of the Company's acquisitions in 1996 of Applied
Computing Devices, Inc. ("ACD") and the Special Services Network ("SSN")
division of MPR Teltech Inc. and the acquisition of the DSS II license from
Northern Telecom in 1997. As a result of these acquisitions, the Company added
OS related products and services that the Company has been able to market to a
wider group of customers. In addition, the Company added a number of TSPs that
were new customers to the Company. To date, the OS customers tend to be IXCs,
CAPs and enterprise vendors who have not invested in legacy systems from
BellCore. While the Company believes its customer base diversification is
beneficial to the Company, there can be no assurances that the Company will be
able to continue expanding the distribution of its OS and system products and
services to additional prospective customers. In addition, the Company's
customers are significantly larger than the Company and may be able to exert a
high degree of influence over the Company. The loss of one or more of the
Company's major customers, the reduction of orders, a delay in deployment of the
Company's products, a labor strike at one or more of the Company's major
customers, such as the recent Bell Atlantic strike, or the cancellation,
modification or non-renewal of license or maintenance agreements could
materially and adversely affect the Company's business, operating results and
financial condition.  BellSouth, Bell Atlantic, Ameritech, Southwestern Bell and
MCI have entered into purchase contracts with the Company. MCI has also entered
into license agreements with the Company. Other TSPs purchase the Company's
network system products and license OS products under standard purchase orders.
Since the RBOC and MCI contracts may be terminated at either the customer's or
the Company's convenience, the Company believes that the purchase contracts and
license agreements are not materially different than purchasing or licensing
under purchase orders. Prior to selling products to RBOCs and certain other
TSPs, a vendor must often first undergo a product qualification process with the
TSP for its products. Although the qualification process for a new product
varies somewhat among these prospective customers, the Company's experience is
that the process often takes a year or more. Currently, the five RBOCs, MCI,
Worldcomm and several other customers have qualified the Company's products,
when required. Any failure on the part of any of the Company's customers to
maintain their qualification of the Company's products, failure of any of the
TSPs to deploy the Company's products, or any attempt by any of the TSPs to seek
out alternative suppliers could have a material adverse effect on the Company's
business, operating results and financial condition. There can be no assurance
that the Company's products will be qualified by new customers, or that such
qualification will not be significantly delayed. Furthermore, work force
reductions and staff reassignments by some of the Company's customers have in

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<PAGE>

the past delayed the product qualification process, and the Company expects 
such reductions and reassignments to continue in the future. There can be no 
assurance that such reductions and reassignments will not have a material 
adverse effect on the Company's business, operating results and financial 
condition. 

HIGH DEPENDENCE ON TWO PRODUCT LINES.  Historically, the majority of the
Company's revenue has been derived from the sale of its network systems products
and services. However, as a result of acquisitions completed in 1996 and 1997,
the Company added additional product lines and derived revenue from a product
mix of both network systems products and services and network management OS
software products and services. Revenue from network systems products and
services, including CTS, T3AS and Remote Module, generated 74%, 50% and 59% of
the Company's total revenues in 1996, 1997 and first six months of 1998,
respectively. Revenue from network management OS products and services,
including software design services, .Provisioner, Test OS, TDC&E and FMS,
generated 26%, 50% and 41% of the Company's total revenue in 1996, 1997 and
first six months of 1998, respectively. However, there can be no assurance that
the Company's future revenues will not be heavily dependent on sales from one of
its primary product lines. The Company is investing in the expansion of these
two product lines through the enhancement, development and marketing of its
Remote Module, CTS, PAAS, T3AS and OS products. Failure by the Company to
enhance either its existing products and services or to develop new product
lines and new markets could materially and adversely affect the Company's
business, operating results and financial condition. There is no assurance that
the Company will be able to develop and market new products and technology or
otherwise diversify its source of revenue. 

MANAGEMENT OF CHANGING BUSINESS.  As a result of acquisitions in 1996,  the
Company obtained additional office space and hired additional personnel in both
Terre Haute, Indiana and British Columbia, Canada to support the business
operations of the new products, services and technologies acquired.  The Company
continues to face significant management challenges related to the integration
of the business operations of the new organizations' personnel, products,
services and technologies acquired. In 1996, the Company formed two business
units: the Network Systems business unit and the Network Management business
unit. The business units are a result of the evolution of the Company from a
single product line to multiple product lines. The Network Management business
unit focuses on OS software products including .Provisioner, Test OS, GTA,
Sectionalizer, FMS, TDC&E, and OS design services. The Network Systems business
unit is built around the Company's test and performance management products,
including T3AS, CTS, Remote Module and PAAS products. There can be no assurance
that the Company will be successful in managing its new business unit structure.
In June 1997, the Company acquired a license from Northern Telecom to its DSS II
software product and technology. The Company markets and supports the DSS II
product and technology under the new name .Provisioner. The Company is
integrating the licensed technology into new product development. The
acquisition of the software license has generated a shift in the Company's
Canadian subsidiary's operations from a software design services business to a
product business and the transition will likely place a significant strain on
the Company's management, information systems and operations and there can be no
assurance that such a transition can be successfully managed. In addition, in
November 1997, the Company opened an office in Richardson, Texas to expand new
product development efforts. The acquisitions and resultant growth in the
Company's infrastructure have placed, and are expected to continue to place, a
significant strain on the Company's management, information systems and
operations. The strain experienced to date has chiefly been in management of a
geographically distributed organization, and in hiring sufficient numbers of
qualified personnel to support the expansion of the business. The Company may
also make future acquisitions where it believes it can acquire new products or
otherwise rapidly enter new or emerging markets. Mergers and acquisitions of
high technology companies are inherently risky and can place significant strains
on the Company's management, information systems and operations. The Company is
not able to forecast additional strains that may be placed on the Company's
management, information systems and operations as a result of recent or future
acquisitions or in the future. The Company's potential inability to manage its
changing business effectively could have a material adverse effect on the
Company's business, operating results, and financial condition. 

CUSTOMER MERGERS. Of the nine major TSPs currently involved in or that have 
recently completed merger transactions, seven are customers of the Company. 
Several of the mergers involve companies that purchase network systems and 
software products and services from the Company's competitors. Consequently,  
the completion of certain of these mergers may result in the loss of 
business and customers for the Company. Additionally, the impact of capital 
spending  constraints during the merger transitions and thereafter could 
have a material adverse effect on the Company's business, operating results 
and financial condition. In addition, future merger transactions involving or 
contemplated by the Company's current or prospective customers may cause 
increased concentration among some of the Company's major customers or delays 
or decreases in their capital spending decisions, any of which could have a 
material adverse effect on the Company's business, operating results and 
financial condition.

RAPID TECHNOLOGICAL CHANGE AND DEPENDENCE ON NEW PRODUCTS.  The market for 
the Company's products is characterized by rapid technological advances, 
evolving industry transmission standards, changing regulatory environments, 
price-competitive bidding, changes in customer requirements, and frequent new 
product introductions and enhancements. The introduction 

14

<PAGE>

of telecommunications network performance management products involving 
superior technologies or the evolution of alternative technologies or new 
industry transmission standards could render the Company's existing products, 
as well as products currently under development, obsolete and unmarketable.  
The Company believes its future success will depend in part upon its ability, 
on a cost-effective and timely basis, to continue to enhance its products, to 
develop and introduce new products for the telecommunications network 
performance management market, to address new industry standards and changing 
customer needs and to achieve broad market acceptance for its products. In 
particular, the Company anticipates that the SONET and SDH optical 
transmission standards will become the industry transmission standards over 
the coming years for the North American and international networks, 
respectively. The Company's current network circuit test and performance 
monitoring systems do not address either the SONET or SDH transmission 
standards. The Company intends to extend its current products and develop new 
products to accommodate such new transmission standards and other advances in 
technology, as they evolve. The widespread adoption of SONET and/or SDH as 
industry transmission standards before the Company is able to successfully 
develop products which address such transmission standards could in the 
future adversely affect the sale and deployment of the Company's products. 

The Company's OS products are designed to operate on a variety of hardware and
software platforms and with a variety of databases employed by its customers in
their networks. The Company must continually modify and enhance its OS products
to keep pace with changes in hardware and software platforms and database
technology.  As a result, uncertainties related to the timing and nature of new
product announcements, introductions or modifications by systems vendors,
particularly, Sun Microsystems and Hewlett Packard, and by vendors of relational
database software, particularly, Oracle Corporation, could materially adversely
impact the Company's business, operating results and financial condition. In
addition, the failure of the Company's OS products to operate across the various
existing and evolving versions of hardware and software platforms and database
environments employed by customers would have a material adverse effect on the
Company's business, operating results and financial condition. 

The introduction or announcement of products by the Company or one or more of
its competitors embodying new technologies, or changes in industry standards or
customer requirements, could render the Company's existing products and
solutions obsolete and unmarketable. The introduction of new or enhanced
versions of its products requires the Company to manage the transition from
older products in order to minimize disruption in customer ordering. There can
be no assurance that the introduction or announcement of new product offerings
by the Company or its competitors will not cause customers to defer licensing or
purchasing of existing Company products or engaging the Company's services. Any
deferral of revenues could have a material adverse effect on the Company's
business, operating results and financial condition. 

Any failure by the Company to anticipate or respond on a cost-effective and
timely basis to technological developments, changes in industry transmission
standards or customer requirements, or any significant delays in product
development or introduction could have a material adverse effect on the
Company's business. There can be no assurance that the Company will be able to
successfully develop new products to meet customer requirements, to address new
industry transmission standards and technological changes or to respond to new
product announcements by others, or that such products will achieve market
acceptance. 

DEPENDENCE ON SUPPLIERS AND SUBCONTRACTORS.  Certain components used in the
Company's T3AS, CTS, PAAS and Remote Module products, including its VLSI ASICs,
are available from a single source and other components are available from only
a limited number of sources. The Company has few supply agreements and generally
makes its purchases with purchase orders. Further, certain components require an
order lead time of up to one year. Other components that currently are readily
available may become difficult to obtain in the future. Failure of the Company
to order sufficient quantities of these components in advance could prevent the
Company from increasing production in response to customer orders in excess of
amounts projected by the Company. In the past, the Company has experienced
delays in the receipt of certain of its key components, which have resulted in
delays in product deliveries. There can be no assurance that delays in key
component and part deliveries will not occur in the future. 

The inability to obtain sufficient key components as required or to develop 
alternative sources if and as required in the future could result in delays 
or reductions in product shipments, which in turn could have a material 
adverse effect on the Company's customer relationships and operating results. 
Additionally, the Company uses third-party subcontractors for the manufacture 
of its sub-assemblies, some of which are located in Asia. This reliance on 
third-party subcontractors involves several risks, including the potential 
absence of adequate capacity, the unavailability of or interruption in access 
to certain process technologies, and reduced control over product quality, 
delivery schedules, manufacturing yields and costs. The Company believes that 
the recent significant economic downturns in Asia may increase these risks 
with respect to its Asian third-party subcontractors. Shortages of raw 
materials or production capacity constraints at the Company's subcontractors 
could negatively affect the Company's ability to meet its production 
obligations and could result in increased prices for affected parts. 

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HIGH INVENTORY LEVELS AND NEED TO MAKE ADVANCE PURCHASE COMMITMENTS. To respond
to anticipated customer demand, the Company maintains high inventory levels.
Maintaining high inventory levels substantially increases the risk that the
Company's profitability and results of operations may from time to time be
materially and adversely affected by inventory obsolescence. To procure adequate
supplies of certain products or components, the Company must make advance
commitments to purchase relatively large quantities of such products or
components in a number of circumstances. A large portion of the Company's
purchase commitments consists of custom parts, some of which are sole-source
such as VLSI ASICs, for which there is no alternative use or application. The
inability of the Company to sell such products or incorporate such components in
its other products could have a material adverse effect on the Company's
business, operating results and financial condition. 

YEAR 2000 COMPLIANCE.  Many installed computer systems and software products are
coded to accept only two digit entries in the date code field. As the year 2000
approaches, these code fields will need to accept four digit entries to
distinguish years beginning with "19" from those beginning with "20" dates. As a
result, in less than two years, computer systems and/or software products used
by many companies may need to be upgraded to comply with such year 2000
requirements. The Company is assessing its products, as well as its internal
management information systems in order to identify and modify those products
and systems that are not year 2000 compliant. Based upon a preliminary
assessment, the Company expects such modifications will be made on a timely
basis and does not believe that the cost of such modifications will have a
material effect on the Company's operating results or financial condition. There
can be no assurance, however, that the Company's preliminary assessment is
accurate. If the Company encounters any unanticipated delays in or costs 
associated with the implementation of such changes, in particular with 
respect to the Company's products, the Company's business, operating results 
and financial condition could be materially adversely affected. 

PRODUCT RECALL AND DEFECTS.  Producers of telecommunications network performance
management products such as those being marketed by the Company, are often
required to meet rigorous standards imposed by BellCore, the research and
development entity created following the divestiture of AT&T to provide ongoing
engineering support to the RBOCs. In addition, the Company must meet specialized
standards imposed by many of its customers.  The Company's products are also
required to interface in a complex and changing environment with
telecommunication network equipment made by numerous other suppliers. Since many
of these suppliers are competitors of the Company, there can be no assurance
that they will cooperate with the Company. In the event there are material
deficiencies or defects in the design or manufacture of the Company's systems,
or if the Company's systems become incompatible with existing third-party
network equipment, the affected products could be subject to a recall. The
Company has experienced two significant product recalls in its history and there
can be no assurance that the Company will not experience any product recalls in
the future. The cost of any subsequent product recall and associated negative
publicity could have a material adverse effect on the Company's business,
operating results and financial condition. In addition, the Company's
development and enhancement of its complex OS products entails substantial risks
of product defects. There can be no assurance that software errors will not be
found in existing or new products or releases after commencement of commercial
licensing, which may result in delay or loss of revenue, loss of market share,
failure to achieve market acceptance, or may otherwise adversely impact the
Company's business, operating results and financial condition. 

GOVERNMENT REGULATION.  The majority of the Company's customers operate within
the telecommunications industry which is subject to regulation in the United
States and other countries.  Most of the Company's customers must receive
regulatory approvals in conducting their businesses.  Although the
telecommunications industry has recently experienced government deregulation,
there is no assurance this trend will continue. Moreover, the federal and state
courts and the FCC continue to interpret and clarify the provisions of the 1996
Telecommunications Act. In fact, recent regulatory rulings have affected the
ability of the Company's customers to enter new markets and deliver new services
which could impact their ability to make significant capital expenditures. The
effect of judicial or regulatory rulings by federal and state agencies on the
Company's customers may adversely impact the Company's business, operating
results and financial condition. 

POTENTIAL COMPETITION FROM RBOCS.  The 1996 Telecommunications Act has generally
eliminated the restrictions which had previously prohibited the RBOCs from
manufacturing telecommunications equipment (subject to first satisfying certain
conditions designed to facilitate local exchange competition and receipt of
prior approval by the FCC). These restrictions had been imposed under the
Modification of Final Judgment, which governed the structure of the 1984
divestiture by AT&T of its local operating telephone company subsidiaries. The
passage of the 1996 Telecommunications Act may have an adverse effect on the
Company because the RBOCs, which are presently the Company's principal
customers, may now become manufacturers of some or all of the products currently
manufactured and sold by the Company and, consequently, may no longer purchase
telecommunications equipment produced by the Company at the levels historically
experienced. 

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PROPRIETARY TECHNOLOGY.  The Company relies on a combination of technical 
leadership, patent, trade secret, copyright and trademark protection and 
non-disclosure agreements to protect its proprietary rights. Although the 
Company has pursued and intends to continue to pursue patent protection of 
inventions that it considers important and for which such protection is 
available, the Company believes its success will be largely dependent on its 
reputation for technology, product innovation, affordability, marketing 
ability and response to customers needs. Currently, the Company has fourteen 
U.S. patents granted and five U.S. patent applications allowed. Four of the 
granted patents relates to the Company's Remote Module product.  
Additionally, the Company has five pending U.S. patent applications and four 
international (Patent Cooperation Treaty and European Patent Office) 
applications on file covering various circuit and system aspects of its 
products. There can be no assurance that the Company will be granted 
additional patents or that, if any patents are granted, they will provide the 
Company's products with significant protection or will not be challenged. 
Additionally, should a third party challenge any of the Company's current or 
future patents, there can be no assurance that the Company will be successful 
in defending its patents or that any litigation, regardless of outcome, will 
not result in substantial cost to and diversion of efforts by the Company. As 
part of its confidentiality procedures, the Company generally enters into 
non-disclosure agreements with its employees, consultants and suppliers, and 
limits access to and distribution of its proprietary information. Despite 
these precautions, it may be possible for a third party to copy or otherwise 
obtain and use the Company's technology without authorization. Accordingly, 
there can be no assurance that the Company will be successful in protecting 
its proprietary technology or that ADA's proprietary rights will preclude 
competitors from developing products or technology equivalent or superior to 
that of the Company. The telecommunications industry is characterized by the 
existence of a large number of patents and frequent litigation based on 
allegations of patent infringement. The Company is currently not party to any 
litigation regarding any patents or other intellectual property rights. 
However, there can be no assurance that third parties will not assert 
infringement claims against the Company in the future or that any such 
assertions will not result in costly litigation or require the Company to 
obtain a license to intellectual property rights of such parties. There can 
be no assurance that any such licenses would be available on terms acceptable 
to the Company, if at all. Further, litigation, regardless of outcome, could 
result in substantial cost to and diversion of efforts by the Company. Any 
infringement claims or litigation by or against the Company could materially 
and adversely affect the Company's business, operating results and financial 
condition. Moreover, the laws of some foreign countries do not protect the 
Company's proprietary rights in the products to the same extent as do the 
laws of the United States. 

The Company relies on certain software that it licenses from third parties,
including software that is integrated with internally developed software and
used in the Company's products to perform key functions.  There can be no
assurance that these third party software licenses will continue to be available
to the Company on commercially reasonable terms or that such licenses will not
be terminated. Although the Company believes that alternative software is
available from other third party suppliers, the loss of or inability of the
third parties to enhance their products in a timely and cost-effective manner
could result in delays or reductions in product shipments by the Company until
equivalent software could be developed internally or identified, licensed, and
integrated, which could have a material adverse effect on the Company's
business, operating results and financial condition. 

DEPENDENCE ON KEY PERSONNEL.  The success of the Company is dependent, in part,
on its ability to attract and retain highly qualified personnel. Competition for
such personnel is intense and the inability to attract and retain additional key
employees or the loss of one or more current key employees could adversely
affect the Company. There can be no assurance that the Company will be
successful in hiring or retaining requisite personnel. 

VOLATILITY OF STOCK PRICE.  The Company's future earnings and stock  price may
be subject to significant volatility, particularly on a quarterly basis. Any
shortfall in revenue or earnings from levels expected by public market analysts
and investors could have an immediate and significant adverse effect on the
trading price of the Company's Common Stock.  Fluctuation in the Company's stock
price may also have an effect on customer decisions to purchase the Company's
products which could have a material adverse effect on the Company's business,
operating results and financial condition.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK 

Not applicable.

17

<PAGE>

                                      PART II

                                 OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS.

     From time to time, ADA may be involved in litigation relating to claims
     arising out of its operations in the normal course of business. As of the
     date of this Quarterly Report, the Company is not a party to any legal
     proceedings.

ITEM 2.  CHANGES IN SECURITIES AND USE OF PROCEEDS.

     None.

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES.

     None.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

     The Annual Meeting of Stockholders was held on May 21, 1998.  At the
     meeting, the stockholders elected Kenneth E. Olson, Christopher B. Paisley,
     Peter P. Savage and Edward F. Tuck as directors of the Company for the
     ensuing year and until their respective successors are elected. The
     following tables sets forth the results of voting in this election:
     
<TABLE>
<CAPTION>
                                           FOR           AGAINST       WITHHELD
                                           ---           -------       --------
           <S>                           <C>             <C>           <C>
           Kenneth E. Olson              10,280,182           --        115,231
           Christopher B. Paisley        10,284,820           --        110,593
           Peter P. Savage               10,283,972           --        111,441
           Edward F. Tuck                10,287,458           --        107,955
</TABLE>

     In addition, the stockholders voted on the following proposals:

     (a) To approve the adoption of the Company's 1998 Employee Stock Purchase
     Plan:
     
<TABLE>
<CAPTION>
                       FOR               AGAINST            ABSTAIN
                       ---               -------            -------
                    <S>                  <C>                <C>
                    9,093,861            1,245,499           56,053
</TABLE>

     This proposal was approved.

     (b) To approve the adoption of the amendment to the Company's 1994 Stock
     Option/Stock Issuance Plan:

<TABLE>
<CAPTION>
                       FOR                AGAINST           ABSTAIN
                       ---                -------           -------
                    <S>                  <C>                <C>
                    8,170,229            2,177,409           47,525
</TABLE>

     This proposal was approved.

     (c) To ratify the appointment of Coopers and Lybrand L.L.P. as the
     Company's independent public accountants for the fiscal year ending
     December 31, 1998:

<TABLE>
<CAPTION>
                       FOR                AGAINST           ABSTAIN
                       ---                -------           -------
                    <S>                  <C>                <C>
                   10,314,229               42,315           38,869
</TABLE>

     This proposal was approved.

ITEM 5.  OTHER INFORMATION.

     Proposals of stockholders intended to be presented at the next Annual
     Meeting of the Stockholders of the Company must be received by the Company
     at its offices at 9855 Scranton Road, San Diego, CA, 92121 not later than
     December 14, 1998.

18

<PAGE>

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K.

     (a) Exhibits.


 EXHIBIT
 NUMBER                                DESCRIPTION
 -------                               -----------

  3.3(1)  Certificate of Incorporation of the Company.

  3.4(2)  Certificate of Agreement of Merger of the Company and its 
          California predecessor.

  3.5(1)  Bylaws of the Company.

 10.1*    Agreement between Telesector Resources Group, Inc. ("Bell Atlantic")
          and Applied Digital Access, Inc. executed July 15, 1998.

 27.1     Financial Data Schedule.

- ----------
(1)  Incorporated by reference to the Company's Current Report on Form 8-K 
     dated December 23, 1997 (File No. 0-23698).

(2)  Incorporated by reference to the Company's Current Report on Form 8-K/A 
     dated January 12, 1998 (File No. 0-26398).

*    Certain confidential portions of this Exhibit were omitted by means of
deleting the text and replacing it with an asterisk (the "Mark").  This 
Exhibit has been filed separately with the Secretary of the Commission 
without the Mark pursuant to the Company's Application Requesting 
Confidential Treatment under rule 24b-2 under the Securities Exchange Act of 
1934.

     (b) Reports on Form 8-K.

     None.

19

<PAGE>

                                     SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                       Applied Digital Access, Inc.
     
Date: August 14, 1998                  /s/  PETER P. SAVAGE 
                                       ----------------------------
                                       Peter P. Savage
                                       Director
                                       President and Chief Executive Officer
     
Date: August 14, 1998                  /s/  JAMES L. KEEFE      
                                       ----------------------------
                                       James L. Keefe
                                       Vice President Finance and
                                       Administration and Chief
                                       Financial Officer


20

<PAGE>

                                 TABLE OF CONTENTS

<TABLE>
<S>  <C>                                                                            <C>
1.   APPENDICES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2.   DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

     2.1. ACCEPTANCE DATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
     2.2. AFFILIATE . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . .1
     2.3. DOCUMENTATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
     2.4. LICENSED MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.5. PRODUCT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.6. SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.7. SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.8. SOURCE CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.9. SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     2.10. WORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

3.   AGREEMENT TO PURCHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

     3.1. SCOPE OF AGREEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
     3.2. TERM OF AGREEMENT ("TERM"). . . . .. . . . . . . . . . . . . . . . . . . .2
     3.3. INTERRELATIONSHIP WITH ORDERS AND APPENDICES . . . . . . . . . . . . . . .3
     3.4. NON-EXCLUSIVE MARKET RIGHTS. . . . . . . . . . . . . . . . . . . . . . . .3

4.   SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

     4.1. SPECIFICATIONS AND DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . .3

5.   PRICES AND TERMS OF PAYMENT . . . . . . . . . . . . . . . . . . . . . . . . . .3

     5.1. PRICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
       5.1.A. Pricing . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . .3
       5.1.B. Increase During Term . . . . . . . . . . . . . . . . . . . . . . . . .3
       5.1.C. Reductions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
       5.1.D. Continuous Improvement . . . . . . . . . . . . . . . . . . . . . . . .4
       5.1.E. New Technology Replacement . . . . . . . . . . . . . . . . . . . . . .4
       5.1.F. New Technology Additions . . . . . . . . . . . . . . . . . . . . . . .4
       5.1.G. BELL ATLANTIC-Requested Enhancements . . . . . . . . . . . . . . . . .4
     5.2. TERMS OF PAYMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
       5.2.A. PRODUCT and SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . .4
       5.2.B. Engineering SERVICES . . . . . . . . . . . . . . . . . . . . . . . . .5
       5.2.C. All other SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . .5
     5.3. DISCOUNTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
     5.4. BILLING VERIFICATION AND AUTHORIZATION FOR PAYMENT PROCESS ("BVAPP") . . .5

6.   ASSIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

     6.1. ASSIGNMENT BY BELL ATLANTIC. . . . . . . . . . . . . . . . . . . . . . . .5
     6.2. ASSIGNMENT BY SUPPLIER. . .. . . . . . . . . . . . . . . . . . . . . . . .5
     6.3. PROHIBITED ASSIGNMENTS . . . . . . . . . . . . . . . . . . . . . . . . . .5

7.   TITLE; INTELLECTUAL PROPERTY. . . . . . . . . . . . . . . . . . . . . . . . . .6

     7.1. PUBLICITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
     7.2. PRODUCT MARKINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
     7.3. INFORMATION AND INTELLECTUAL PROPERTY. . . . . . . . . . . . . . . . . . .6
       7.3.A. Information Defined. . . . . . . . . . . . . . . . . . . . . . . . . .6
       7.3.B. ADA Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 
       7.3.C. BA Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
       7.3.D. Work Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
     7.4. LICENSED MATERIALS.. . . . . . . . . . . . . . . . . . . . . . . . . . . .8
     7.5. PROHIBITED USES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
     7.6. ACCESS TO WORK IN PROGRESS.. . . . . . . . . . . . . . . . . . . . . . . .9
     7.7. TITLE AND RISK OF LOSS.. . . . . . . . . . . . . . . . . . . . . . . . . .9
     7.8. QUIET ENJOYMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9


</TABLE>
<PAGE>

<TABLE>
<S>  <C>                                                                            <C>
     7.9. INFRINGEMENT OF PATENTS, COPYRIGHTS, AND TRADEMARKS. . . . . . . . . . . .9

8.   PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

     8.1. SUPPLIER COMPREHENSIVE RESPONSIBILITIES FOR OVERALL PERFORMANCE. . . . . 10
     8.2. PERFORMANCE STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . 10

9.   TERMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

     9.1. TERMINATION  FOR  CAUSE. . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.2. TERMINATION WITHOUT CAUSE  . . . . . . . . . . . . . . . . . . . . . . . 11
     9.3. TERMINATION FOR  INSOLVENCY, BANKRUPTCY, ASSIGNMENT,  EXPROPRIATION, 
     AND/OR LIQUIDATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.4. RIGHTS IN TERMINATION. . . . . . . . . . . . . . . . . . . . . . . . . . 11

10.  DELIVERY AND SHIPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

     10.1. FOB POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     10.2. COSTS AND ROUTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     10.3. SCHEDULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
       10.3.A. Schedules ARO . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
       10.3.B. Accelerated Schedules . . . . . . . . . . . . . . . . . . . . . . . 12
       10.3.C. Notice of Delivery. . . . . . . . . . . . . . . . . . . . . . . . . 12
       10.3.D. Keeping Schedules . . . . . . . . . . . . . . . . . . . . . . . . . 12
     10.4. SHIPPING AND BILLING. . . . . . . . . . . . . . . . . . . . . . . . . . 12
     10.5. SHIPPING SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     10.6. NOTICE OF DELAY.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

11.  ORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

     11.1. ORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
     11.2. VARIATION IN QUANTITY . . . . . . . . . . . . . . . . . . . . . . . . . 13
     11.3. TERMINATION OF ORDER. . . . . . . . . . . . . . . . . . . . . . . . . . 13
     11.4. CHANGE ORDER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
       11.4.A. Request and Issuance. . . . . . . . . . . . . . . . . . . . . . . . 14
       11.4.B. Adjustment Limitations. . . . . . . . . . . . . . . . . . . . . . . 14
       11.4.C. BELL ATLANTIC Assistance/Advice . . . . . . . . . . . . . . . . . . 14
       11.4.D. Request for Information . . . . . . . . . . . . . . . . . . . . . . 14
     11.5. STOP WORK ORDER.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
       11.5.A. Issuance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
       11.5.B. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
       11.5.C. Cancellation or Expiration. . . . . . . . . . . . . . . . . . . . . 15
       11.5.D. Termination of Work . . . . . . . . . . . . . . . . . . . . . . . . 15

12.  QUALITY ASSURANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

     12.1. QUALITY SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
     12.2. QUALITY PERFORMANCE REPORTING . . . . . . . . . . . . . . . . . . . . . 16
     12.3. SOURCE INSPECTION.. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     12.4. PACKING.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     12.5. MARKING.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     12.6. TECHNICAL SUPPORT.. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
       12.6.A. Full Customer Support During Engineering, Installation and
       Conversion Periods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
       12.6.B. Customer Support Post Acceptance. . . . . . . . . . . . . . . . . . 17
     12.7. ENGINEERING COMPLAINTS. . . . . . . . . . . . . . . . . . . . . . . . . 18
     12.8. CHANGES TO PRODUCT OR SOFTWARE CHANGE NOTICES ("PCNS"). . . . . . . . . 19
     12.9. REPAIRS AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . 19
       12.9.A. Repair And Replacement Procedures . . . . . . . . . . . . . . . . . 19
       12.9.B. Pre-Acceptance. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
       12.9.C. In Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
       12.9.D. Out Of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . 21
       12.9.E. Emergency "Out Of Service" Conditions . . . . . . . . . . . . . . . 21
     12.10. DETAIL ENGINEERING, OFFICE RECORDS . . . . . . . . . . . . . . . . . . 22
     12.11. INSTALLATION BY SUPPLIER . . . . . . . . . . . . . . . . . . . . . . . 22
     12.12. INSTALLATION BY BELL ATLANTIC, ITS AFFILIATES OR AFFILIATE'S AGENTS. . 22

</TABLE>
<PAGE>

<TABLE>

<S>  <C>                                                                            <C>
       12.12.A. Installation Interval and Documentation. . . . . . . . . . . . . . 22
       12.12.B. Installation Procedures. . . . . . . . . . . . . . . . . . . . . . 22
     12.13. ACCEPTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
     12.14. INFORMATION KEPT CURRENT . . . . . . . . . . . . . . . . . . . . . . . 23
     12.15. CORRECTIVE ACTION. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     12.16. CONTINUOUS IMPROVEMENT PLAN [SOFTWARE QUALITY IMPROVEMENT PLAN
     ("SQIP"). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

13.  WARRANTIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

     13.1. WARRANTY OF TITLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     13.2. PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
     13.3. SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
     13.4. WARRANTY PERIOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
       13.4.A. Commencement. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
       13.4.B. PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
       13.4.C. SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
       13.4.D. Third Party PRODUCTS and SOFTWARE . . . . . . . . . . . . . . . . . 25
       13.4.E. Consumable Components . . . . . . . . . . . . . . . . . . . . . . . 25
       13.4.F. Identical SYSTEM(s), PRODUCT, or SOFTWARE . . . . . . . . . . . . . 25
       13.4.G. Extension for non-conforming PRODUCT or SOFTWARE. . . . . . . . . . 25
     13.5. YEAR 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
       13.5.A. SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
       13.5.B. SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     13.6. ILLICIT CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     13.7. SERVICES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     13.8. EMPLOYEES AND SUBCONTRACTORS BOUND. . . . . . . . . . . . . . . . . . . 26
     13.9. LIMITATIONS ON WARRANTIES . . . . . . . . . . . . . . . . . . . . . . . 26

14.  COMPLIANCE WITH REGULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 27

     14.1. COMPLIANCE WITH LAWS. . . . . . . . . . . . . . . . . . . . . . . . . . 27
     14.2. RADIO FREQUENCY ENERGY STANDARDS. . . . . . . . . . . . . . . . . . . . 27
     14.3. REGISTRATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     14.4. GOVERNMENT CONTRACT PROVISIONS. . . . . . . . . . . . . . . . . . . . . 28
     14.5. ENVIRONMENTAL COMPLIANCE. . . . . . . . . . . . . . . . . . . . . . . . 28
     14.6. HAZARDOUS CHEMICAL INFORMATION. . . . . . . . . . . . . . . . . . . . . 28
     14.7. OCCUPATIONAL SAFETY AND HEALTH ACT (O.S.H.A.) . . . . . . . . . . . . . 28
     14.8. EXPORT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

15.  WORKAROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

     15.1. SCHEDULING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

16.  DOCUMENTATION AND RECORD KEEPING. . . . . . . . . . . . . . . . . . . . . . . 29

     16.1. DOCUMENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
     16.2. PERIODIC REPORTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
     16.3. RECORDS AND AUDIT . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

17.  PROFESSIONAL SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

     17.1. TRAINING SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
     17.2. CONSULTING SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . 31

18.  SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

     18.1. CONTINUING AVAILABILITY . . . . . . . . . . . . . . . . . . . . . . . . 31
     18.2. EXTRAORDINARY SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . 31
     18.3. REGULATORY ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . 32

19.  GENERAL PROVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

     19.1. SEVERABILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
     19.2. CHOICE OF LAW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
     19.3. MINORITY AND WOMEN-OWNED BUSINESS ENTERPRISES . . . . . . . . . . . . . 32
     19.4. TAXES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
     19.5. SURVIVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

</TABLE>
<PAGE>

<TABLE>

<S>  <C>                                                                            <C>
     19.6. NON-WAIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
     19.7. NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
     19.8. FORCE MAJEURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
     19.9. MOST FAVORED CUSTOMER . . . . . . . . . . . . . . . . . . . . . . . . . 33
     19.10. RELEASES VOID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
     19.11. ALTERNATE DISPUTE RESOLUTION . . . . . . . . . . . . . . . . . . . . . 34
       19.11.A. Referral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
       19.11.B. Mediation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
     19.12. INDEPENDENT OBLIGATION OF SUPPLIER TO CONTINUE PERFORMANCE . . . . . . 35
     19.13. LIABILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
     19.14. INSURANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
     19.15. IMPLEADER AND LIMITED LIABILITY OF BELL ATLANTIC . . . . . . . . . . . 36
     19.16. WORK PERFORMED ON BELL ATLANTIC PREMISES . . . . . . . . . . . . . . . 36
       19.16.A. Clean Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
       19.16.B. Harmony. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
       19.16.C. Plant And Work Rules . . . . . . . . . . . . . . . . . . . . . . . 36
       19.16.D. Right Of Access. . . . . . . . . . . . . . . . . . . . . . . . . . 36
       19.16.E. Tools And Equipment. . . . . . . . . . . . . . . . . . . . . . . . 36
       19.16.F. Work Hereunder . . . . . . . . . . . . . . . . . . . . . . . . . . 36
     19.17. RIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
     19.18. HEADINGS AND CAPTIONS
     20.0 NPRM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

21.  ENTIRE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

</TABLE>

<PAGE>

                                                                  Page 1 of 38

BELL ATLANTIC and APPLIED DIGITAL ACCESS  (ADA) AGREEMENT

THIS AGREEMENT ("AGREEMENT") is entered into this March 1, 1998 (the "Effective
Date") by and between Telesector Resources Group, Inc., a Delaware corporation
with offices at 240 E. 38th Street, New York, N.Y. 10016, on behalf of itself
and for the benefit of its AFFILIATES, (hereinafter collectively referred to as
"BELL ATLANTIC") and Applied Digital Access, Inc. with offices at 9855 Scranton
Road, San Diego, CA  92121 (hereinafter referred to as "SUPPLIER").  Under the
AGREEMENT, BELL ATLANTIC agrees to purchase and SUPPLIER agrees to sell SYSTEMS,
PRODUCT, SERVICES and DOCUMENTATION and to license SOFTWARE when ordered by BELL
ATLANTIC in accordance with the terms and conditions stated in this AGREEMENT.

NOW, THEREFORE, in consideration of the mutual promises and conditions set forth
herein, and intending to be legally bound, the parties agree as follows:


1. APPENDICES

     The following appendices are attached hereto and are hereby made a part of
     this AGREEMENT:
     
         Appendix         Title
    
            A        Prices, Schedules, Discounts
            B        Documentation
            C        Specifications
            D        Training
            E        Engineering, Installation and Installation Support
            F        Intentionally Omitted
            G        Intentionally Omitted
            H        BVAPP
            I        Quality Exceptions
            J        Software Upgrade Program
            K        Diversified Supplier Second Tier Report Form
            L        Sample Non-Disclosure                      
            M        CTS/T3AS NPRM Support Matrix

2. DEFINITIONS

     2.1. ACCEPTANCE DATE
     
     ACCEPTANCE DATE shall mean the day the applicable PRODUCT successfully 
     completes all acceptance requirements provided for in this AGREEMENT and 
     any applicable ORDER.

     2.2. AFFILIATE  
     
     AFFILIATE means, at any time, and with respect to any corporation, 
     person or other entity (a) any other corporation that at such time, 
     directly or indirectly through one or more intermediaries, controls, or 
     is controlled by, or is under common control with, such first 
     corporation, person or other entity; or (b) any other corporation, 
     person or other entity beneficially owning or holding, directly or 
     indirectly, 25% or more of any class of voting or equity interests of 
     the first corporation or any subsidiary or any corporation of which the 
     first corporation and its subsidiaries beneficially own or hold, in the 
     aggregate, directly or indirectly, 25% or more of any class of voting or 
     equity interests. As used in this definition, "Control" means the 
     possession, directly or indirectly, of the power to direct or cause the 
     direction of the management and policies of a corporation, person or 
     other entity whether through the ownership of voting securities, or by 
     contract or otherwise.

     2.3. DOCUMENTATION
     
     DOCUMENTATION  shall mean the  written materials, drawings, and 
     specifications provided by SUPPLIER associated with a PRODUCT that are 
     more fully described or referenced on Exhibit B, that include but are 
     not limited to, descriptions of planning, installation, engineering, 
     use, test, maintenance, analysis, repair, operation, and acceptance 

<PAGE>

                                                                  Page 2 of 38

     testing of the SYSTEM, together with any and all modifications, 
     revisions, additions, improvements or enhancements made generally 
     available by SUPPLIER from time to time.

     2.4. LICENSED MATERIALS
     
     LICENSED MATERIALS shall mean the SOFTWARE and the firmware or internal 
     code fixed in, or otherwise incident to, the PRODUCT, for which licenses 
     are granted by SUPPLIER under this AGREEMENT.

     2.5. PRODUCT
     
     PRODUCT  shall mean any or all hardware, components, materials, 
     apparatus, documentation and LICENSED MATERIALS as specified in this 
     AGREEMENT or in an ORDER, or which are integral to, or associated with 
     the acceptable functioning and performance of SUPPLIER's SYSTEM, which 
     may be ordered hereunder from SUPPLIER by BELL ATLANTIC.

     2.6. SERVICES
     
     SERVICES  shall mean the SUPPLIER's system engineering, installation, 
     installation support, technical support, emergency technical assistance, 
     training, and other related SERVICES which may be ordered hereunder, 
     including, without limitation, those set forth or otherwise identified 
     in the  Appendices to this AGREEMENT.

     2.7. SOFTWARE
     
     SOFTWARE  shall mean a program, or programs, consisting of machine 
     readable logical instructions and tables of information, including, 
     without limitation, those set forth or otherwise identified in all 
     Appendices to this AGREEMENT, which guide the functioning of a processor 
     and which provide BELL ATLANTIC with the functional and operational 
     performance capabilities and capacities or as may be identified in any 
     ORDER, associated Appendices or other document or attachments associated 
     with the ORDER.  Such programs include, but are not limited to, control 
     programs, application programs, operating SYSTEM programs, base-feature 
     programs, optional-feature programs, and other programs related to the 
     operation, administration and/or support of PRODUCT.

     2.8. SOURCE CODE
     
     SOURCE CODE shall mean a computer program in the form of high-level 
     language that generally is not directly executable by a processor.

     2.9. SYSTEM
     
     SYSTEM  shall mean the PRODUCT(S) and SOFTWARE of, and associated with, 
     SUPPLIER's system, functioning together, performing and interoperating 
     as a fully integrated and efficient whole with itself and with specified 
     other network elements and other facilities and equipment in the BELL 
     ATLANTIC network in accordance with the requirements and specifications 
     incident to this AGREEMENT or any ORDER(s) issued pursuant to this 
     AGREEMENT, including, without limitation, those set forth or otherwise 
     identified in all Appendices to this AGREEMENT.

     2.10. WORK
     
     WORK  shall mean the provision of SYSTEMs, PRODUCT, SOFTWARE, and 
     DOCUMENTATION and the performance of SERVICES incident to this AGREEMENT 
     or any ORDER(s) issued pursuant to this AGREEMENT, including, without 
     limitation, those set forth or otherwise identified in all Appendices to 
     this AGREEMENT.

3. AGREEMENT TO PURCHASE

     3.1. SCOPE OF AGREEMENT  
     
     BELL ATLANTIC agrees to purchase and SUPPLIER agrees to sell, SYSTEM(S), 
     PRODUCT(S),  SERVICES and DOCUMENTATION and to license SOFTWARE, when 
     ordered by BELL ATLANTIC in accordance with the terms and conditions 
     stated in this AGREEMENT at the prices identified in Appendix A, hereto, 
     entitled PRICES, SCHEDULES, DISCOUNTS.   This is an "as ordered" 
     agreement. This Agreement is not intended and shall not be construed as 
     a commitment on the part of BELL ATLANTIC to purchase any SYSTEMS, 
     PRODUCT(S) or SERVICES, or to purchase a license to any SOFTWARE and 
     RELATED DOCUMENTATION from SUPPLIER.

     3.2. TERM OF AGREEMENT ("TERM")
     
     This AGREEMENT shall commence on March 1, 1998 and, unless otherwise 
     terminated pursuant to the provisions of this AGREEMENT, shall continue 
     until February 28, 2001.  BELL ATLANTIC shall have the option to extend 
     the AGREEMENT  for successive terms of  one (1) year by  giving written 
     notice to SUPPLIER at least thirty (30) days prior to February 28, 2001 
     or the applicable succeeding anniversary date, which shall be the 
     effective date of termination, or unless otherwise terminated as 
     provided herein.  This AGREEMENT shall be effective for SYSTEMS,

<PAGE>

                                                                  Page 3 of 38

     PRODUCTS, SOFTWARE, SERVICES, DOCUMENTATION, and LICENSED MATERIALS 
     ordered by BELL ATLANTIC during the Term and any extension thereof.

     3.3. INTERRELATIONSHIP WITH ORDERS AND APPENDICES  
     
     Whenever the provisions of an ORDER conflict with the provisions of this 
     AGREEMENT, the typewritten provisions of the ORDER which have been 
     mutually agreed upon by the parties in writing and which are not 
     pre-printed as part of a form shall control and take precedence over the 
     conflicting provisions of this AGREEMENT, but only for purposes of such 
     ORDER and, except for the conflicting provisions of such ORDER, the 
     terms and conditions of this AGREEMENT shall not be deemed to be 
     amended, modified, canceled, or waived.  Conflicting pre-printed 
     provisions on the reverse or front of the forms belonging to either 
     party shall be deemed deleted.  In the event of any conflict between 
     this AGREEMENT and the Appendices attached hereto, the following order 
     of precedence is provided: a) this AGREEMENT, (b) Appendix A, (c) 
     Appendix J, (d) Appendix D, (e) Appendix B, (f) Appendix C, (g) Appendix 
     E, (h) Appendix H,  (i) Appendix I (j) Appendix K, (k) Appendix L and 
     (l) Appendix M.

     3.4. NON-EXCLUSIVE MARKET RIGHTS  
     
     It is expressly understood and agreed that this AGREEMENT neither grants 
     to SUPPLIER an exclusive privilege to sell or provide to BELL ATLANTIC 
     any or all PRODUCTS or SERVICES of the type described in this AGREEMENT 
     which BELL ATLANTIC may require, nor does it require the purchase of any 
     SYSTEM, PRODUCTS, SOFTWARE, DOCUMENTATION, LICENSED MATERIALS, or 
     SERVICES from SUPPLIER by BELL ATLANTIC. SUPPLIER understands and agrees 
     that BELL ATLANTIC is free to and may contract with other manufacturers 
     and suppliers for the procurement of comparable products.

4. SPECIFICATIONS

     4.1. SPECIFICATIONS AND DRAWINGS  
     
     SUPPLIER's standard commercial and/or technical specifications 
     (including drawings) or other applicable documentation referenced or 
     listed in Appendix C hereto, entitled SPECIFICATIONS (collectively 
     "SPECIFICATIONS") relating to the SYSTEM, PRODUCT, SERVICES, 
     DOCUMENTATION and LICENSED MATERIALS provided hereunder , as may be 
     amended and approved by BELL ATLANTIC, shall be considered a part of 
     this AGREEMENT.  Upon request, SUPPLIER agrees to provide BELL ATLANTIC, 
     at no charge, a total of *copies of all such SPECIFICATIONS and approved 
     amendments thereto, as issued.

5. PRICES AND TERMS OF PAYMENT

     5.1. PRICES

          5.1.A. PRICING 

          SYSTEMS, PRODUCTS, SOFTWARE, SERVICES, DOCUMENTATION and LICENSED 
          MATERIALS will be furnished by SUPPLIER in accordance with the 
          prices stated in APPENDIX A hereof, entitled PRICES, SCHEDULES, 
          DISCOUNTS.  All costs and prices identified are inclusive of 
          Appendices A through J as well as all terms and conditions of this 
          AGREEMENT.  Such prices shall be applicable to ORDERs issued to 
          SUPPLIER by BELL ATLANTIC(s) at the location and by the method 
          agreed to by the parties.  SUPPLIER's price list for SOFTWARE in 
          APPENDIX A hereto, entitled PRICES, SCHEDULES, DISCOUNTS must 
          differentiate between operating system SOFTWARE and applications 
          SOFTWARE according to the FCC mandated Uniform SYSTEM of Accounts, 
          Part 32 of the FCC Rules and Regulations. 

          5.1.B. INCREASE DURING TERM  
     
          For a period of three (3) years after the initial Effective Date, 
          SUPPLIER shall not increase prices for any  SYSTEMS, PRODUCT, 
          SOFTWARE, SERVICES, DOCUMENTATION and LICENSED MATERIALS specified 
          in Appendix A. *However, SUPPLIER must reserve the right to review 
          its prices based on unexpected  changes in parts costs and 
          availability.  If there is a documented  need to increase prices 
          for the renewal period, SUPPLIER will provide thirty (30) days 
          advance written notice of any price increase including 
          documentation and an explanation for the increase.  Any active and  
          valid proposal(s) shall be honored..  Price increases for any 
          SYSTEM, PRODUCT, SOFTWARE, SERVICES, DOCUMENTATION or LICENSED 
          MATERIALS shall not occur more frequently than *every *.

          5.1.C. REDUCTIONS  
     
          Price reductions may be initiated by SUPPLIER at any time.




          *  Confidential portion has been omitted and filed separately with 
             the Secretary of the Commission.
<PAGE>

                                                                  Page 4 of 38

          5.1.D. CONTINUOUS IMPROVEMENT  
     
          SUPPLIER and BELL ATLANTIC shall identify areas in which SUPPLIER 
          shall seek to attain  improvement in cost, quality, pricing and 
          service over the term of this AGREEMENT ("Continuous Improvement"). 
          SUPPLIER shall use commercially reasonable efforts to afford BELL 
          ATLANTIC  the ability to realize the benefits of such improvement 
          including price reductions. SUPPLIER and  BELL ATLANTIC will meet 
          at least once every three months to assess SUPPLIER's progress 
          towards implementation of Continuous Improvement.

          5.1.E. NEW TECHNOLOGY REPLACEMENT  
     
          BELL ATLANTIC and SUPPLIER recognize that SUPPLIER may develop and 
          market new PRODUCTS ("New Technology") that are designed to enhance 
          or replace the PRODUCTS provided for in this AGREEMENT.  SUPPLIER 
          agrees to include the New Technology as part of its PRODUCT 
          offerings within the terms provided for in this AGREEMENT, subject 
          to the following:

          1.   New Technology shall only be furnished to BELL ATLANTIC  pursuant
               to a written amendment hereto and in accordance with Section
               11.4, entitled CHANGE ORDERS, except that price reductions may be
               made at any time.  

          2.   New Technology shall be priced at the same or lower price for
               comparable, or substitute features and functionality, as the
               replaced PRODUCT or SOFTWARE in accordance with the mutual goal
               of Continuous Improvement. 

          3.   In the event New Technology will cause the SUPPLIER to incur
               greater per-unit costs compared to current PRODUCTS but will
               offer substantially increased capacity or features such that
               SUPPLIER believes a price increase is justified, then:

               3.a.   SUPPLIER shall provide to BELL ATLANTIC a written 
                      detailed explanation of such proposed price increase 
                      including a breakdown of the additional costs incurred 
                      by the SUPPLIER in providing such PRODUCTS and how such 
                      additional features or capacity shall help reach the 
                      goal of Continuous Improvement.

               3.b.   SUPPLIER shall ensure continued availability of the 
                      current PRODUCTS or PRODUCTS of similar functionality 
                      during the Term at the same or lower price as stated in 
                      Appendix A, entitled PRICES, SCHEDULES and DISCOUNTS 
                      (as such price may have been adjusted in accordance 
                      with the terms of this Agreement), unless otherwise 
                      agreed to pursuant to a written amendment to this 
                      AGREEMENT.

          4.   All such proposed changes to Appendix A hereto, entitled PRICES,
               SCHEDULES, DISCOUNTS,  relating to New Technology shall be
               subject to BELL ATLANTIC's written consent evidenced by a written
               amendment to this AGREEMENT which shall not be unreasonably
               withheld or delayed.

          5.1.F.  NEW TECHNOLOGY ADDITIONS 
     
          SUPPLIER may propose the addition of New Technology to Appendix A 
          hereto which is not intended to replace or upgrade current PRODUCT 
          ("New Technology Addition").  SUPPLIER shall provide a detailed 
          written explanation of how such New Technology Addition will meet 
          the joint goal of Continuous Improvement.  All proposed New 
          Technology Additions shall only be furnished to BELL ATLANTIC 
          pursuant to a written amendment to this AGREEMENT or pursuant to a 
          separate written agreement between the parties.

          5.1.G.  BELL ATLANTIC-REQUESTED ENHANCEMENTS 
     
          BELL ATLANTIC shall have the right, from time to time, to request 
          SUPPLIER to develop enhancements to the System ("Enhancements") by 
          providing SUPPLIER with written notice of its request and a 
          description of the requested Enhancement. The parties agree to 
          negotiate in good faith, the terms of any such development, 
          including, without limitation, the rights that BELL ATLANTIC shall 
          have in the Enhancement, if any, and BELL ATLANTIC's payment of 
          development fees, to be set forth in a definitive written 
          agreement. Nothing in this Agreement shall restrict SUPPLIER's 
          development and/or licensing of any technology for third parties or 
          obligate either party to negotiate for more than ninety (90) days.

     5.2.  TERMS OF PAYMENT
     
          5.2.A.  PRODUCT AND SOFTWARE

          SUPPLIER's invoice for PRODUCT and/or SOFTWARE shall be paid net 
          thirty (30) days from receipt of invoice, but in no event shall 
          invoice be dated prior to shipment of PRODUCT and/or SOFTWARE by 
          BELL ATLANTIC.

<PAGE>

                                                                  Page 5 of 38

          5.2.B.  ENGINEERING SERVICES
     
          SUPPLIER's invoice for engineering SERVICES shall be paid net 
          thirty (30) days from receipt of invoice, but in no event shall 
          invoice be dated prior to completion and acceptance of engineering 
          SERVICES and delivery of the job specifications(s) to BELL ATLANTIC.

          5.2.C.  ALL OTHER SERVICES
     
          SUPPLIER's invoice for all other SERVICES shall be paid net thirty 
          (30) days from receipt of invoice, but in no event shall invoice be 
          dated prior to the completion and acceptance of such SERVICES.

     5.3.  DISCOUNTS  
     
     SUPPLIER agrees to grant BELL ATLANTIC the discounts set forth in the 
     section of Appendix A entitled "Discounts."  The applicable discounts 
     shall be in effect throughout the effective period of this AGREEMENT and 
     shall apply to PRODUCT, LICENSED MATERIALS, DOCUMENTATION, and SERVICES 
     as specified in Appendix A.

     5.4.  BILLING VERIFICATION AND AUTHORIZATION FOR PAYMENT PROCESS ("BVAPP")
     
     Whenever BELL ATLANTIC issues an ORDER, the identification number of 
     which is prefaced by the letter "B,"SUPPLIER shall code central office 
     equipment and render billing in accordance with Appendix H , "BVAPP 
     Central Office Equipment Identification and Invoicing Requirements".  
     Whenever the provisions of this clause conflict with any other clause in 
     this AGREEMENT, the provisions of this clause shall prevail.

6.  ASSIGNMENT

     6.1.  ASSIGNMENT BY BELL ATLANTIC 
     
     BELL ATLANTIC shall have the right to assign this AGREEMENT and/or to 
     assign its rights and delegate its duties, obligations or commitments 
     under this AGREEMENT, either in whole or in part, to any of its 
     AFFILIATES, parent, and/or subsidiaries upon written notice to SUPPLIER 
     provided the assignee agrees in writing to assume all of BELL ATLANTIC's 
     obligations hereunder.

     Except to an AFFILIATE, BELL ATLANTIC may not sublicense, assign, or
     otherwise transfer the right to use SUPPLIER's LICENSED MATERIAL (including
     LICENSED MATERIAL embedded in a PRODUCT or SYSTEM) without SUPPLIER's prior
     written approval.   SUPPLIER'S approval shall be contingent, in part, upon
     the parties reaching written agreement with respect to the terms for
     payment of  royalties or license fees to SUPPLIER relating to the usage of
     the transferred LICENSED MATERIAL  by  the transferee.   BELL ATLANTIC
     acknowledges that any such sublicense, assignment or other transfer shall
     not include an assignment of the warranty terms in Article 13 entitled
     WARRANTIES.  Notwithstanding anything to the contrary herein, BELL ATLANTIC
     and its AFFILIATES are expressly prohibited from transferring or otherwise
     assigning the right to use SUPPLIER's LICENSED MATERIAL or technical
     information to any of SUPPLIER's competitors or any foreign company,
     governmental body, or agency which is not subject to the U.S. laws and
     enforcement pertaining to patents and copyrights protection. 

     Any assignment pursuant to this clause shall neither affect nor diminish
     any rights or duties that BELL ATLANTIC may then have as to PRODUCT or
     SERVICES ordered by, or SOFTWARE licensed to, BELL ATLANTIC or delivered by
     SUPPLIER prior to the effective date of the assignment or as to PRODUCT,
     SERVICES or SOFTWARE which is beyond the scope of the assignment.  Upon the
     acceptance of the assignment and the assumption of the duties under this
     AGREEMENT by the assignee, the assignor shall be released and discharged,
     to the extent of the assignment, from all further duties under this
     AGREEMENT.

     6.2.  ASSIGNMENT BY SUPPLIER 
     
     SUPPLIER shall have the right to assign this AGREEMENT and/or to assign 
     its rights and delegate its duties, obligations or commitments under 
     this AGREEMENT, either in whole or in part, to any of its AFFILIATES, 
     parent, and/or subsidiaries or in connection with the sale of all or 
     substantially all of the assets, business or equity securities of 
     SUPPLIER upon written notice to BELL ATLANTIC provided the assignee 
     agrees in writing to assume all of SUPPLIER's obligations hereunder.

     6.3.  PROHIBITED ASSIGNMENTS  
     
     Any assignment of any right or interest under this AGREEMENT, or ORDERs 
     issued pursuant to this AGREEMENT, except in accordance with this 
     Article or the assignment of monies due or to become due, without the 
     prior written consent of the non-assigning party, which consent will not 
     be unreasonably withheld, shall be deemed void and ineffective. Any 
     assignment of monies shall be void and ineffective to the extent that 
     (1) SUPPLIER shall not have given BELL  ATLANTIC at least sixty (60) 
     days prior written notice of such assignment and/or  (2) such assignment 

<PAGE>

                                                                  Page 6 of 38

     attempts to impose upon BELL ATLANTIC obligations to the assignee 
     additional to the payment of such monies, or which are in excess of or 
     differ from its obligations hereunder, or to preclude BELL ATLANTIC from 
     dealing solely and directly with SUPPLIER in all matters pertaining to 
     this AGREEMENT including the negotiation of amendments or settlements of 
     charges due.

7.  TITLE; INTELLECTUAL PROPERTY

     7.1.  PUBLICITY  
     
     SUPPLIER and BELL ATLANTIC agree to submit to the other party all 
     advertising, sales, and promotional materials, press releases and other 
     publicity materials relating to the SYSTEM, PRODUCT, SOFTWARE to be 
     furnished, or the SERVICES performed, by the SUPPLIER under this 
     AGREEMENT wherein the name, marks, or the name or mark of the other is 
     mentioned or containing language from which the connection of said names 
     or marks may be inferred or implied; and the parties further agree not 
     to publish or use such advertising, sales and promotional materials, 
     press releases, or other publicity materials before receiving the prior 
     written approval from the other party.  Such approval shall not be 
     unreasonably withheld.  SUPPLIER shall not use any trademark, trade 
     name, trade dress or any name, picture or logo which is commonly 
     identified with BELL ATLANTIC or any BELL ATLANTIC AFFILIAATES without 
     the express written permission of BELL ATLANTIC.  

     7.2.  PRODUCT MARKINGS  
     
     If BELL ATLANTIC requires or allows SUPPLIER to place any marking or 
     name on PRODUCTS (other than SUPPLIER's customary and ordinary markings 
     and names), SUPPLIER shall ensure that the name or marking is only 
     placed on PRODUCTS covered by this AGREEMENT.  SUPPLIER shall completely 
     remove the marking or name from any PRODUCTS upon which the name or 
     marking was placed but which are not sold to or accepted by BELL 
     ATLANTIC.

          7.2.A.  INFORMATION AND INTELLECTUAL PROPERTY
     
          7.2.B.  INFORMATION DEFINED.  The term "Information" includes:  
          programs; specifications, drawings, models, technical and business 
          data and plans; works of authorship and other creative works; and 
          ideas, knowledge and know-how. Information may be transmitted in 
          writing (or other tangible form) or orally

          7.2.B  ADA INFORMATION.   The parties acknowledges that in 
          connection with the performance of this AGREEMENT, ADA may seek to 
          provide information, documented on any tangible media, including, 
          without limitation, writings, drawings, sound recordings, computer 
          programs, pictorial representations and graphs, to BELL ATLANTIC, 
          which ADA claims is proprietary, and ADA may require that BELL 
          ATLANTIC protect the confidentiality of such information and 
          prevent its disclosure outside BELL ATLANTIC.  ADA has already 
          provided to BELL ATLANTIC certain information ("Contract 
          Information"), which ADA considers proprietary and in connection 
          with which ADA requests confidential treatment.  BELL ATLANTIC 
          acknowledges the proprietary nature of this information.  Such 
          Contract Information shall be attached to this AGREEMENT and shall 
          be specifically listed below and specifically referenced in the 
          mutual non-disclosure agreement attached as Appendix L hereto.  
          BELL ATLANTIC make as a good faith commitment to protect such 
          Contract Information from disclosure outside BELL ATLANTIC to the 
          degree set forth below and as set forth in the mutual 
          non-disclosure agreement attached as Appendix L hereto.  The 
          Contract Information is specifically identified below.
     
          1.  Appendix A - Prices, Schedules and Discounts
          2.  Pricing Information on Appendix J - Software Upgrade Program
          3.  Specifications in Appendix C
          4.  Source Code in any Product (as defined in the Agreement)
          5.  Remote Module Command Guide
          6.  Pricing Guide - T3AS, Centralized Test System, Protocol Analysis
              Access System (Revs. A, B, C, D)
     
          Pursuant to the process described below, ADA may add to the 
          Contract Information additional information ("Subsequent 
          Confidential Information") which it considers proprietary and in 
          connection with which BELL ATLANTIC makes a good faith commitment  
          to prevent its disclosure outside BELL ATLANTIC to the degree 
          described below and as set forth in the mutual non-disclosure 
          agreement attached as Appendix L hereto.  Prior to providing such 
          Subsequent Confidential Information to BELL ATLANTIC, ADA shall 
          make a request for such confidential treatment in writing to Mr. 
          Tom Trempy of BELL ATLANTIC (or his designated successor ) ("the 
          Gatekeeper") and provide a single copy of the relevant Subsequent 
          Confidential Information for which protection is sought along with 
          the request.  The Gatekeeper will determine whether the SUBSEQUENT 
          CONFIDENTIAL INFORMATION is of a proprietary nature such that 
          confidential 

<PAGE>

                                                                  Page 7 of 38

          treatment is appropriate and/or whether it is essential that ADA 
          provide such information to BELL ATLANTIC. 
          
              1.  In the event the Gatekeeper decides that the Subsequent 
          Confidential Information is not essential to BELL ATLANTIC, he 
          shall promptly return the Subsequent Confidential Information to 
          ADA.  
     
              2.  If the Gatekeeper determines that the Subsequent 
          Confidential Information is essential but that it is not, in his 
          opinion, sufficiently proprietary to warrant confidential 
          treatment, he shall notify ADA of his conclusion and ADA, at its 
          option, may demand that he return the Subsequent Confidential 
          Information or rescind its request for confidential treatment. 
     
              3.  If the Gatekeeper concludes that the Subsequent 
          Confidential Information deserves such confidential treatment and 
          that such information is essential to BELL ATLANTIC, the parties 
          shall specifically identify the Subsequent Confidential Information 
          in the mutual non-disclosure agreement attached as Appendix L 
          hereto.
     
          Upon receipt of the request and its accompanying Subsequent 
          Confidential Information and throughout the period during which he 
          conducts his review, the Gatekeeper will protect the Subsequent 
          Confidential Information from disclosure.
     
          Pursuant to such an executed non-disclosure agreement, BELL 
          ATLANTIC will make a good faith commitment to ADA to maintain such 
          information, specifically identified in the mutual non-disclosure 
          agreement, in confidence with the same level of protection and care 
          that BELL ATLANTIC normally affords its own confidential 
          information, but in no event less than reasonable care; and shall 
          take commercially-reasonable steps sufficient to meet its good 
          faith commitment, including informing BELL ATLANTIC employees, 
          agents, representatives or independent contractors, who receive 
          either Contract Information or Subsequent Confidential Information, 
          of their obligation not to disclose such outside BELL ATLANTIC.
     
          Notwithstanding the foregoing provisions of this section, BELL 
          ATLANTIC shall not be liable to ADA for damages of any kind for its 
          inadvertent and unintentional failure to meet its good faith 
          commitment.  Furthermore, BELL ATLANTIC's disclosure of the such 
          information will not be deemed to breach this section if and to the 
          extent such information:

          1. Is now or hereafter becomes available to the public without a 
             breach of this section;

          2. Is rightfully received by the receiving party without restrictions 
             on its use or further disclosure by a third party; or

          3. Is disclosed pursuant to any applicable law, rule, regulation or 
             order of a court of competent jurisdiction, agency or regulatory 
             commission. In the event that ADA discloses information which it 
             claims is proprietary prior to or without requesting 
             confidential treatment in the manner discussed above, BELL 
             ATLANTIC shall not treat such information as proprietary 
             (regardless of whether it bears a proprietary or confidential 
             legend or marking) and BELL ATLANTIC shall be under no 
             obligation to protect such information from disclosure.
     
          The terms of this section shall supersede all prior letters of 
          intent, agreements, covenants, arrangements, communications, 
          representations, or warranties, whether oral or written, by any 
          officer, employee, or representative of either party relating to 
          the confidentiality of information exchanged by the parties in 
          connection with the performance of this AGREEMENT.
     
          7.2.C. BA INFORMATION

          Information that BELL ATLANTIC furnishes to SUPPLIER or that 
          SUPPLIER otherwise comes into contact with under this Agreement 
          will remain BELL ATLANTIC property.  SUPPLIER will return such BELL 
          ATLANTIC'S Information to BELL ATLANTIC at BELL ATLANTIC's request. 
          Information that SUPPLIER furnishes to BELL ATLANTIC or that BELL 
          ATLANTIC otherwise comes into contact with under this Agreement 
          will remain SUPPLIER property.  BELL ATLANTIC will return such 
          SUPPLIER Information to SUPPLIER at SUPPLIER's request.  

          7.2.D.   WORK PRODUCT
     
          The parties concur that, except as they may separately agree 
          pursuant to a definitive written development agreement, none of the 
          firmware, software, documentation or other works of authorship, 
          processes, methods, techniques, or know-how produced or developed 
          by SUPPLIER  pursuant to this Agreement shall constitute a work for 
          hire and, accordingly, no copyright  rights or other intellectual 
          property rights with respect to the same shall accrue to BELL 
          ATLANTIC.
<PAGE>

                                                                  Page 8 of 38
     7.3.   LICENSED MATERIALS
     
     Unless otherwise specified in an ORDER and subject to all the terms and 
     conditions of this Agreement and the applicable ORDER, SUPPLIER hereby 
     grants to BELL ATLANTIC,  as to any LICENSED MATERIALS supplied by 
     SUPPLIER under an ORDER, a perpetual, worldwide, non-sublicensable, 
     non-transferable, non-exclusive  license:

     (i)  to use, execute and operate the LICENSED MATERIALS , in whole or in
     part, on any hardware on which it was delivered or intended to execute or
     operate in the normal course of business;

     (ii) to display, transmit, reproduce one (1) copy solely for archival and
     backup purposes, and integrate the LICENSED MATERIALS exclusively on BELL
     ATLANTIC's internal data communications network (which includes, without
     limitation, BELL ATLANTIC's public switch and transmission facilities
     network); and

     (iii)     to sublicense, distribute, and market the LICENSED MATERIALS 
     upon execution of a separate re-seller or other marketing AGREEMENT subject
     to terms for royalty fees and conditions for sublicense as agreed upon by
     SUPPLIER.

     If the Federal Communications Commission or a comparable state-level
     regulatory agency mandates that the SYSTEM or its functionalities be
     accessible to competitors of BELL ATLANTIC or other users of the network on
     which the SYSTEM is placed, or in any way requires further licensing of the
     LICENSED MATERIALS, then SUPPLIER agrees promptly to undertake negotiations
     in good faith to license directly those competitors or potential SYSTEM
     users as identified by  BELL ATLANTIC.  In the event that the
     aforementioned legal mandate requires a sublicensing scheme to facilitate
     access to unbundled operational service support network elements, or if
     BELL ATLANTIC determines that business practicalities necessitate a 
     sublicensing scheme, then SUPPLIER agrees to permit BELL ATLANTIC to
     sublicense SUPPLIER's LICENSED MATERIALS.  Such sublicense must be drafted
     in accordance with the following terms:

     i) As  Sublicensor, BELL ATLANTIC may grant to a Sublicensee (whether a
     competing local exchange carrier or other entity that requires access under
     the applicable law) a perpetual, network specific (available for use on
     only those telecommunications networks maintained by BELL ATLANTIC and
     subject to this AGREEMENT), nonsublicensable, nontransferable, 
     non-exclusive, sublicense in any Licensed Materials subject to this 
     AGREEMENT;

     ii)  Sublicensee must agree to abide by the use parameters defined by this
     AGREEMENT with the following amendments:
     
          a)   Permissive uses as set forth in this AGREEMENT may be granted 
          to the Sublicensee, however, at no time may a Sublicensee have 
          physical or electronic access to the source code of the SOFTWARE; 
          and

          b)   As the Sublicensee did not purchase and does not possess any 
          hardware on which to execute or operate the SOFTWARE, all uses must 
          be confined to only those possible through Sublicensor's display 
          interface hardware.

     iii) Sublicensee must agree in writing a) not to engage in any of the
     prohibited uses set forth in this AGREEMENT; b) that it will have no right
     to further license any rights to the LICENSED MATERIALS; and c) that it
     will keep all confidences as described within this AGREEMENT; and

     iv)  The Sublicensee must contain mutually agreeable pricing provisions.

     The license term for SOFTWARE shall commence on the date of invoice of such
     SOFTWARE and shall continue perpetually, unless terminated in accordance
     with Section 9.  

     With each license of SOFTWARE ordered hereunder, SUPPLIER shall provide
     BELL ATLANTIC with one copy of the applicable DOCUMENTATION identified in
     Appendix B hereof, entitled DOCUMENTATION.  DOCUMENTATION shall comply with
     commonly accepted industry standards with respect to content, size,
     legibility and reproducibility.

     7.4.   PROHIBITED USES
     
     BELL ATLANTIC agrees not to translate, decompile, dissemble or reverse 
     engineer any PRODUCT, SOFTWARE, LICENSED MATERIALS or  SYSTEM or 
     otherwise attempt to alter, adapt or discover the SOURCE CODE of any 
     PRODUCT, SOFTWARE, LICENSED MATERIALS or  SYSTEM by any means whatsoever 
     or permit another to do so. Further, except as expressly permitted under 
     this Agreement, BELL ATLANTIC may not:

     a)   Provide, rent, lease, lend, use for timesharing or service bureau
          purposes, sell, network, transfer, or otherwise distribute or allow
          others to use any PRODUCT, SOFTWARE, LICENSED MATERIALS or  SYSTEM, or
          any copy or portion thereof, or BELL ATLANTIC's rights under this
          AGREEMENT on a temporary or permanent basis to or for the benefit of
          another person or entity without the prior written permission of
          SUPPLIER;
     
     b)   Modify, incorporate into or with other software or create a 
          derivative work based upon any part of any PRODUCT, SOFTWARE, 
          LICENSED MATERIALS or SYSTEM or attempt or permit a third party to 
          do so, except to the limited extent that such actions do not affect 
          the form or function of any PRODUCT, SOFTWARE, 

<PAGE>

                                                                  Page 9 of 38
 
          LICENSED MATERIALS or SYSTEM provided that foregoing shall not 
          restrict BELL ATLANTIC from using standard application program 
          interfaces as necessary to permit interoperability of any PRODUCT, 
          SOFTWARE, LICENSED MATERIALS or  SYSTEM with other applications;

     c)   Make any copies of the PRODUCTS, SOFTWARE, LICENSED MATERIALS or
          DOCUMENTATION  or distribute any other materials provided by SUPPLIER
          other than for BELL ATLANTIC's (excluding any affiliates which
          function as telecommunications equipment suppliers)  own internal use,
          except as reasonably required to use the PRODUCTS, SOFTWARE, LICENSED
          MATERIALS or DOCUMENTATION in accordance with the license granted
          hereunder or as otherwise required by law and, except for one (1) copy
          made solely for archival and back-up purposes;

     d)   Remove, modify, or obscure the copyright, trademark, and/or any other
          propriety notices or legends contained in any part of any PRODUCT,
          SOFTWARE, LICENSED MATERIALS or SYSTEM or affixed on the PRODUCT,
          SOFTWARE, LICENSED MATERIALS, DOCUMENTATION or SYSTEM media or
          packaging;

     e)   Disclose the results of any benchmark of any PRODUCT, SOFTWARE,
          LICENSED MATERIALS or  SYSTEM to any third party without the prior
          written authorization of SUPPLIER.
     
     In the event BELL ATLANTIC translates, decompiles, dissembles or reverse 
     engineers any PRODUCT, SOFTWARE, LICENSED MATERIALS or  SYSTEM or 
     otherwise attempts to alter, adapt or discover the SOURCE CODE of any 
     PRODUCT, SOFTWARE, LICENSED MATERIALS or the SYSTEM by any means 
     whatsoever or permit another to do so, SUPPLIER shall have the right to 
     terminate BELL ATLANTIC's right to use the affected SOFTWARE or LICENSED 
     MATERIALS as specified by the license in accordance with Section 9 .  In 
     the event BELL ATLANTIC engages in any of the prohibited uses designated 
     as items A-E above, SUPPLIER shall have the right to terminate BELL 
     ATLANTIC's right to use the affected SOFTWARE or LICENSED MATERIALS as 
     specified by the license in accordance with Section 9, provided such 
     prohibited use is of a material nature and, in SUPPLIER's reasonable 
     belief, causes a material adverse effect upon SUPPLIER.   The limits 
     upon SUPPLIER's right to terminate affected licenses outlined above does 
     not preclude SUPPLIER from seeking damages which result from such 
     prohibited use and seek injunctive relief intended to end the prohibited 
     use, but not to enjoin the use of the SOFTWARE or LICENSED MATERIALS in 
     accordance with the terms and conditions of the license.

     7.5.   ACCESS TO WORK IN PROGRESS
     
     SUPPLIER agrees to promptly render, on reasonable request, status 
     reports of the Work in progress containing the information reasonably 
     requested by BELL ATLANTIC.

     7.6.   TITLE AND RISK OF LOSS
     
     Title to and risk of loss for PRODUCTs, excluding LICENSED MATERIAL, 
     purchased hereunder shall vest in BELL ATLANTIC when the delivery of the 
     PRODUCT has been completed to the F.O.B. point specified in the ORDER, 
     including unloading, hoisting and rigging where ordered. BELL ATLANTIC 
     acknowledges and agrees that BELL ATLANTIC shall not acquire any 
     ownership interest in any  LICENSED MATERIALS. Passing title to any 
     PRODUCT shall not constitute acceptance on the part of BELL ATLANTIC. 

     When purchasing PRODUCTS for shipment directly to New York Telephone
     Company or New England Telephone and Telegraph Company, Telesector
     Resources Group, Inc. shall be acting solely as a purchasing agent for the
     company to which the PRODUCT is to be shipped.   When the ORDER(s) is
     placed by an AFFILIATE(s), title to direct ship PRODUCT shall pass from
     SUPPLIER directly to the applicable AFFILIATE(s) and the receiving company
     shall be entitled to all of the rights otherwise afforded to Telesector
     Resources Group, Inc.  under this AGREEMENT.

     7.7.   QUIET ENJOYMENT
     
     With respect to any PRODUCT or Service furnished hereunder, SUPPLIER 
     agrees that BELL ATLANTIC, shall be entitled to possess and use such 
     PRODUCT or SERVICE during the initial term, including any extensions or 
     renewals thereof, without interruption by SUPPLIER or any person 
     claiming by or through SUPPLIER, provided only that BELL ATLANTIC shall 
     duly perform its obligations pursuant to this AGREEMENT and the 
     applicable ORDER.

     7.8.   INFRINGEMENT OF PATENTS, COPYRIGHTS, AND TRADEMARKS
     
     The following terms apply to any infringement, claim of infringement or 
     other misappropriation of any United States patent issued as of the 
     first date of delivery of the applicable PRODUCT, trademark, copyright, 
     or trade secret ("Claim") based on or arising out of BELL ATLANTIC's 
     use, possession, or permitted transfer or resale  of any PRODUCT, 
     SYSTEM, SOFTWARE or DOCUMENTATION, or part thereof, or SERVICES 
     furnished, or the use of any PRODUCT, DOCUMENTATION, and/or SERVICES 
     furnished, or the use of any LICENSED MATERIALS within the scope of the 
     licenses granted to BELL ATLANTIC under this AGREEMENT.

     SUPPLIER shall indemnify BELL ATLANTIC from and against any loss, cost,
     damage, expense, or liability that may arise out of or result solely by
     reason of any such infringement or Claim, except to the extent that such
     infringement or Claim (1) arises solely from SUPPLIER's adherence to Bell
     Atlantic's written instructions, and which instructions 

<PAGE>

                                                                  Page 10 of 38
 

     could not have been satisfied by SUPPLIER, with the exercise of 
     commercial reasonableness, absent such infringement; (2) arises solely 
     as a result of the use of such PRODUCTS or SERVICES in combination with 
     software, hardware or services not provided by SUPPLIER, unless such use 
     is within its normally intended uses, and the infringement is caused by 
     the SUPPLIER's PRODUCTS or SERVICES, and not by another supplier's 
     products or services; (3) arises from a modification of the SYSTEM, 
     PRODUCT, LICENSED MATERIALS,  SOFTWARE or DOCUMENTATION, or any part 
     thereof, after delivery to BELL ATLANTIC or its AFFILIATES, as 
     applicable, by someone other than SUPPLIER, provided such modification 
     solely and directly gives rise to the claim; (4) arises from BELL 
     ATLANTIC's continued allegedly infringing activity after being notified 
     thereof or after being informed of modifications that would have avoided 
     the alleged infringement; (5) incidental use of the SYSTEM, PRODUCT, 
     SOFTWARE or DOCUMENTATION, or any part thereof, where the infringement 
     does not result  from the SYSTEM, PRODUCT, SOFTWARE or DOCUMENTATION; or 
     (6) arises from the use of the SYSTEM, PRODUCT, SOFTWARE or 
     DOCUMENTATION, or any part thereof, that is not in accordance with the 
     license granted hereunder provided  such prohibited use solely and 
     directly gives rise to the claim .  BELL ATLANTIC will indemnify and 
     hold SUPPLIER harmless from all suits, actions, claims, losses, damages 
     and the like, and expenses (including reasonable attorneys' fees) 
     related to claim of infringement excluded from SUPPLIER's indemnity 
     obligations by the preceding sentence upon the same terms and conditions 
     as set forth herein. SUPPLIER acknowledges and agrees that BELL ATLANTIC 
     may look to its other suppliers to fulfill its infringement 
     indemnification obligations hereunder.

     If SUPPLIER is promptly notified by BELL ATLANTIC in writing, in accordance
     with Section 19.7 hereof, of receipt of notice of a Claim of infringement
     for which SUPPLIER is responsible and is given information, assistance and
     the sole authority to defend or settle such claim, SUPPLIER shall (i)
     defend or settle any action, suit or proceeding against  BELL ATLANTIC
     arising in connection with a Claim and (ii) pay any damages and costs
     incurred by BELL ATLANTIC in connection with such claim or suit, including,
     without limitation, legal fees and expenses awarded against or reasonably
     incurred by BELL ATLANTIC in any such action or proceeding.  SUPPLIER shall
     have no responsibility under this Section 7.8 for any settlement it does
     not approve in writing.

     Without limitation of the foregoing, should BELL ATLANTIC's use of, or full
     benefit from, the SYSTEM, PRODUCT, SOFTWARE, DOCUMENTATION or LICENSED
     MATERIALS and/or SERVICES be impeded, prevented or limited by injunction or
     other court order arising out of any such infringement or other cause of
     action for which SUPPLIER is responsible, SUPPLIER shall, in addition to
     the above indemnity, at its option:

     1.   replace or modify such PRODUCT, SYSTEM, DOCUMENTATION, LICENSED
          MATERIALS and/or SERVICES or any part thereof so that they become 
          non-infringing but only if the modification or replacement does not
          adversely affect BELL ATLANTIC's rights or ability to use such
          PRODUCT, DOCUMENTATION and LICENSED MATERIALS  and/or SERVICES; or

     2.   by license or other release from claim of infringement, procure for
          BELL ATLANTIC's  benefit the right to continue to use such PRODUCT,
          SYSTEM, DOCUMENTATION, LICENSED MATERIALS  and/or SERVICES; or

     3.   accept return of such infringing PRODUCT, SYSTEM, DOCUMENTATION,
          LICENSED MATERIALS  and/or SERVICES and refund BELL ATLANTIC for the
          purchase price of such, less depreciation based on a life of five (5)
          years.  

     The foregoing states the entire responsibility of SUPPLIER to BELL ATLANTIC
     for infringement and is in lieu of any warranties of non-infringement which
     are hereby disclaimed.

8.   PERFORMANCE

     8.1.   SUPPLIER COMPREHENSIVE RESPONSIBILITIES FOR OVERALL PERFORMANCE 
     
     SUPPLIER represents, warrants and agrees that it has the full and final 
     responsibility, duty and obligation to provide, perform, deliver and 
     install, the SYSTEM, PRODUCTS, SOFTWARE and SERVICES as well as any 
     ancillary SERVICES, facilities, and equipment, set forth any ORDER(s) 
     issued by BELL ATLANTIC and accepted by SUPPLIER pursuant to this 
     AGREEMENT and further SUPPLIER agrees and acknowledges that any  failure 
     in SUPPLIER's  performance under this AGREEMENT may under the 
     circumstances set forth in this AGREEMENT constitute a Default by 
     SUPPLIER and may give rise to an obligation to pay money damages and 
     such other and additional relief or remedy as may be set forth in this 
     AGREEMENT or permitted at law or in equity.

     8.2.   PERFORMANCE STANDARDS
     
     Performance Standards are set forth in Article 12 hereof, entitled 
     Quality Assurance, together with those as shall be set forth in the 
     applicable ORDER(s). SUPPLIER shall meet or exceed such performance 
     standards in all material respects in all work performed or PRODUCT or 
     SOFTWARE provided under this AGREEMENT or any ORDER(s). In the event 
     SUPPLIER fails to meet Performance Standards, BELL  ATLANTIC shall 
     provide SUPPLIER with 

<PAGE>

                                                                  Page 11 of 38
 
     written Notice thereof, in accordance with  Section 19.7 entitled 
     NOTICES, for each month in which SUPPLIER falls below the minimum 
     performance requirements. Failure to meet material performance 
     requirements shall occur, if SUPPLIER performs below the minimum 
     performance requirements in any material respect consistently over a 
     consecutive three (3) month period or during any six (6) months out of a 
     twelve (12) month period, whether or not such twelve (12) month period 
     coincides with a calendar year.  BELL ATLANTIC shall have the option to 
     invoke Default, should SUPPLIER fail to meet the material performance 
     requirements of this AGREEMENT or any ORDER(s) issued pursuant to this 
     AGREEMENT.

9.   TERMINATION

     9.1.   TERMINATION  FOR  CAUSE  
     
     If either party is in default of any material provision of this  
     AGREEMENT (a "Default"), then the other party may, in addition to any 
     other remedy that may be available in this AGREEMENT or at law, 
     terminate this AGREEMENT upon giving at least thirty (30) days written 
     notice.  However, each party under this paragraph may, by curing the 
     breach within thirty (30) days of receipt of the notice (the "Cure 
     Period"), prevent the termination for cause. Notwithstanding the 
     foregoing, should a Default arise which the parties agree is of such a 
     nature that it cannot be remedied within the Cure Period ("Extended Cure 
     Default"), SUPPLIER shall present within such Cure Period a plan of 
     action to remedy such Extended Cure Default, which plan shall have, in 
     BELL ATLANTIC's reasonable judgment, a reasonable opportunity for 
     success.  If, at the end of the Cure Period, a plan to remedy such 
     Extended Cure Default  reasonably acceptable to BELL ATLANTIC is not 
     presented, then BELL ATLANTIC may terminate the AGREEMENT by giving 
     SUPPLIER at least ten (10) business days prior written notice of the 
     effective date of such termination. With the exception of termination 
     for BELL ATLANTIC's uncured breach of Section 7.4, in no way shall such 
     termination by SUPPLIER act to impair BELL ATLANTIC's right, title and 
     interest to the PRODUCT purchased hereunder and its license rights under 
     Section 7.3.

     9.2.   TERMINATION WITHOUT CAUSE  
     
     BELL ATLANTIC may terminate this AGREEMENT without any liability to 
     SUPPLIER (except for PRODUCTS and SERVICES already purchased pursuant to 
     an ORDER) by providing SUPPLIER with sixty (60) days prior written 
     notice.

     9.3.   TERMINATION FOR  INSOLVENCY, BANKRUPTCY, ASSIGNMENT,  EXPROPRIATION,
            AND/OR LIQUIDATION  
     
     Either party may terminate this  AGREEMENT immediately by giving written 
     notice, without liability to the other party (except for PRODUCTS and 
     SERVICES already purchased pursuant to an ORDER), in the event the other 
     party:

     (1)  is declared insolvent or bankrupt, or makes an assignment or other
          arrangement for the benefit of its creditors;
     
     (2)  has all or any substantial portion of its capital stock or assets
          expropriated by government authority; or

     (3)  is dissolved or liquidated (except as a consequence of a merger,
          consolidation, or other corporate reorganization not involving the
          insolvency or expropriation of that party).
     
     If either party is involved in any of the events described in  
     subsections (1), (2) or (3), it shall  promptly notify the other party.

     9.4.  RIGHTS IN TERMINATION
     
     At the time of termination and to the extent of the termination, each party
     shall return all of the other party's Confidential Information and the 
     parties shall be released from any and all obligations (except as set 
     forth in Section 19.5 hereof entitled "Survival") under this Contract 
     provided that (i) SUPPLIER shall be paid for PRODUCT, DOCUMENTATION, 
     LICENSED MATERIALS and/or SERVICES which have been provided to BELL 
     ATLANTIC under this Agreement prior to the date of termination and (ii) 
     BELL ATLANTIC shall reimburse SUPPLIER for all non-recoverable expenses 
     incurred by SUPPLIER on ORDER(s) in process that have not been provided 
     to BELL ATLANTIC prior to termination provided that SUPPLIER shall 
     provide BELL ATLANTIC with an itemized summary of expenses attributable 
     to such ORDER(s) and in no event shall BELL ATLANTIC be obligated to pay 
     more than the cost of such ORDER(s).  Title to items for which BELL 
     ATLANTIC reimburses SUPPLIER under this section for ORDERs in process 
     shall rest with SUPPLIER.  If for SOFTWARE or SERVICES for which 
     SUPPLIER's fee has been specified on the basis of a definite sum for the 
     completion of such SOFTWARE or SERVICES, the sum payable by BELL 
     ATLANTIC upon termination will be based upon the percent of services or 
     programs completed at the time of the notice of termination.  In the 
     event of termination, BELL ATLANTIC shall continue to hold a perpetual, 
     world-wide, non-sublicensable, non-transferable, non-exclusive license 
     to all SOFTWARE previously  paid for and accepted hereunder by BELL 
     ATLANTIC.  Notwithstanding the foregoing sentence, in the event SUPPLIER 
     terminates this AGREEMENT due to BELL ATLANTIC's breach of Section A, 
     7.3 or 7.4, all licenses granted to BELL ATLANTIC hereunder shall 
     terminate and BELL ATLANTIC shall discontinue all use of the LICENSED 

<PAGE>

                                                                  Page 12 of 38
 
     MATERIALS and all portions thereof (whether or not modified or 
     incorporated into other software or hardware) and so certify to SUPPLIER 
     in writing.

10.  DELIVERY AND SHIPPING

     10.1.  FOB POINT  
     
     PRODUCT and SOFTWARE shall be delivered FOB origin Prepaid or FOB origin 
     Freight Collect ("OC") in accordance with instructions provided on the 
     ORDER. BELL ATLANTIC's designated location to which the PRODUCT and 
     SOFTWARE are to be delivered shall be indicated on the ORDER.  

     10.2.  COSTS AND ROUTING  
     
     For all Prepaid shipments, SUPPLIER shall be responsible for all 
     transportation, warehousing, distribution and delivery costs and BELL 
     ATLANTIC shall reimburse these costs within thirty (30) days of receipt 
     of invoice for such costs.  For all OC shipments, SUPPLIER shall ship 
     all PRODUCT and SOFTWARE Freight Collect (OC) according to BELL 
     ATLANTIC's instructions, which will be given to SUPPLIER by Freight 
     Traffic Services at the 800 number below, and have bills sent to the 
     following address (which address BELL ATLANTIC may change upon providing 
     SUPPLIER with written Notice).

               Telesector Resources Group
               c/o Freight Traffic Services (FTS)
               P.O. Box 1259
               Somerville, New Jersey  08876
               1-800-891-6218
     
     If SUPPLIER fails to follow BELL ATLANTIC's shipping instructions, or if 
     SUPPLIER fails to request instructions when directed to in an ORDER, 
     then SUPPLIER shall be solely responsible for the associated freight 
     bill and freight costs in excess of BELL ATLANTIC's contract rates that 
     are incurred due to SUPPLIER'S non-conformance. If the freight bill is 
     paid by BELL ATLANTIC, SUPPLIER shall be required to reimburse BELL 
     ATLANTIC accordingly within 30 days.

     10.3.  SCHEDULES  
     
     In order to facilitate acquisition planning for PRODUCT, SYSTEM, and 
     SOFTWARE, SUPPLIER shall establish standard delivery schedules for the 
     PRODUCT, SYSTEM and SOFTWARE to be furnished under this AGREEMENT.


          10.3.A.  SCHEDULES ARO
     
          These schedules will be from receipt of BELL ATLANTIC's ORDER until 
          delivery to BELL ATLANTIC's specified location.  Such schedules, 
          which are contained in Appendix A, shall apply to all routine 
          ORDERs placed under this AGREEMENT.

          10.3.B.  ACCELERATED SCHEDULES
     
          In the event that an accelerated delivery schedule is required by 
          BELL ATLANTIC, SUPPLIER shall make a reasonable effort to comply 
          with such requirements.

          10.3.C.  NOTICE OF DELIVERY
     
          SUPPLIER shall give written notice of delivery to BELL ATLANTIC 
          fifteen (15) days prior to the scheduled date of delivery of 
          PRODUCT, SOFTWARE and SERVICES.

          10.3.D.  KEEPING SCHEDULES
     
          If SUPPLIER determines that the scheduled date of delivery will not 
          be met, SUPPLIER shall promptly notify BELL ATLANTIC as stated 
          herein in the clause entitled "NOTICES."

     10.4.  SHIPPING AND BILLING  
     
     Unless instructed otherwise by BELL ATLANTIC, SUPPLIER shall, for ORDERs 
     placed and accepted by SUPPLIER hereunder:  

     1.   Use commercially reasonable efforts to deliver entire quantity of
          items ordered; 
     2.   ship to the destination designated in the ORDER in accordance with 
          specific shipping instructions; 
     3.   ensure that all subordinate documents bear BELL ATLANTIC's ORDER
          number; 
     4.   enclose a packing memorandum with each shipment and when more than one
          package is shipped, identify the one containing the memorandum; 
     5.   mark BELL ATLANTIC's ORDER number on all packages and shipping papers;
     6.   render itemized invoices in duplicate, or as otherwise specified,
          showing ORDER number;
     7.   render separate invoices for each shipment or ORDER;

<PAGE>

                                                                 Page 13 of 38

     8.   invoice BELL ATLANTIC by mailing or otherwise transmitting invoices,
          bills and notices to the billing address on the ORDER after shipment
          of PRODUCT.  
     
     Shipping and routing instructions may be altered in writing, as mutually 
     agreed by SUPPLIER and BELL ATLANTIC.

     In addition, SUPPLIER agrees to provide invoices that include priced units
     of PRODUCT.

     10.5.   SHIPPING SCHEDULE  
     
     The shipping schedule applicable to each ORDER will be that set forth in 
     the ORDER accepted by SUPPLIER or any Change Order, if applicable.  
     SUPPLIER agrees not to ship PRODUCT or SOFTWARE prior to the agreed-upon 
     shipping schedule.  Any variation from the foregoing must be agreed upon 
     by the parties in writing.

     10.6.   NOTICE OF DELAY  
     
     SUPPLIER, having agreed to the delivery date and/or completion date, 
     whichever is applicable, for any combination of PRODUCT, SOFTWARE or 
     SERVICES incorporated into BELL ATLANTIC's ORDER, further agrees to 
     notify BELL ATLANTIC in accordance with Section 19.7, entitled NOTICES, 
     hereof, as soon as any foreseeable delay in that date becomes known to 
     SUPPLIER's management.

11. ORDERS

     11.1.   ORDER FORMAT AND PROCESSING
     
     Any written order or statement of work ("ORDER") issued by BELL 
     ATLANTIC(s) for a SYSTEM, PRODUCT, SOFTWARE,  SERVICES, DOCUMENTATION, 
     and LICENSED MATERIALS specified herein, or which reference this 
     AGREEMENT, shall be deemed to be placed under and incorporate the terms 
     and conditions of this AGREEMENT.

     An ORDER for the purchase of a SYSTEM, PRODUCT, SOFTWARE, and SERVICES
     shall be written on a BELL ATLANTIC's purchase order form and shall contain
     the following:
     
          A.   The incorporation by reference of this AGREEMENT;
          B.   A complete list of the SYSTEM, PRODUCT, SOFTWARE, and SERVICES 
               to be purchased specifying SUPPLIER's part number, CLEI Code 
               (if applicable), quantity, type, model, feature, description 
               and purchase price;
          C.   The locations at which the SYSTEM, PRODUCT, SOFTWARE, and 
               SERVICES will be delivered or installed and to which invoices 
               shall be forwarded;
          D.   The dates by which the SYSTEM, PRODUCT, SOFTWARE and SERVICES 
               are (a) to be shipped or performed and (b) installed or 
               completed and ready for use;
          E.   Any other special terms and conditions agreed upon by the 
               parties.
     
     ORDERs placed for SYSTEM(S), PRODUCT, SERVICES, SOFTWARE which are 
     consistent with the terms and conditions of this AGREEMENT, shall be 
     deemed accepted by SUPPLIER unless written notice to the contrary is 
     received by BELL ATLANTIC(s) within ten (10) business days of 
     SUPPLIER's receipt of ORDER.

     SUPPLIER will review each BELL ATLANTIC ORDER for completeness and accuracy
     with respect to PRODUCTs and part numbers and, prior to submitting the
     ORDER to a sub-contractor, will notify BELL ATLANTIC as to any inaccuracies
     or known deficiencies or incompatibility with any related ORDER.
     
          BELL ATLANTIC shall have the right to change the locations at which 
          the SYSTEM, PRODUCT, SOFTWARE, and SERVICES will be delivered or 
          installed and/or to which invoices shall be forwarded at least 
          three (3) business days prior to shipment at no additional cost to 
          BELL ATLANTIC.  SUPPLIER shall accept such changes and forward a 
          written acknowledgment of such changes to BELL ATLANTIC.

     11.2.   VARIATION IN QUANTITY
     
     BELL ATLANTIC assumes no liability for any PRODUCT or SOFTWARE produced 
     or processed in excess of the amount specified in an ORDER issued 
     pursuant to this AGREEMENT.

     11.3.   TERMINATION OF ORDER
     
     BELL ATLANTIC may, upon written notice to SUPPLIER, * prior to shipment, 
     terminate any or all ORDERs, or portions thereof, placed by BELL 
     ATLANTIC hereunder, except with respect to SYSTEM(S), PRODUCT, and/or 
     SOFTWARE which has already been delivered or SERVICES which have already 
     been completed.  Unless otherwise specified herein, BELL ATLANTIC's 
     liability to SUPPLIER with respect to such terminated ORDER(s) shall be 
     limited to SUPPLIER's purchase price of all components which are not 
     purchased within * of cancellation by SUPPLIER's other customers.

     * Confidential portion has been omitted and filed separately with the 
     Secretary of the Commission.

<PAGE>
                                                                  Page 14 of 38

     11.4. CHANGE ORDER

          11.4.A.  REQUEST AND ISSUANCE

          BELL ATLANTIC may at any time upon thirty (30) days written notice 
          to SUPPLIER, by written order, request a change within the scope of 
          this AGREEMENT or any ORDER(s), including, without limitation, the 
          addition or deletion of SYSTEM(s), PRODUCT, SOFTWARE covered,  the 
          Service(s) to be performed, the time and/or place of performance, 
          delivery or installation thereof. In the event BELL ATLANTIC 
          desires to make such a change, BELL ATLANTIC shall request SUPPLIER 
          to provide a written proposal stating the additional requirements 
          or reduction of existing requirements and the cost and schedule 
          implications incident thereto.  If BELL ATLANTIC is in agreement 
          with the terms, conditions and charges specified in the proposal, 
          BELL ATLANTIC will issue a Change ORDER pursuant to this AGREEMENT 
          reflecting the requested change and the terms specified in 
          SUPPLIER's proposal. Any such order shall be specifically 
          identified as a Change ORDER pursuant to this Section 11.4. All 
          SERVICES and PRODUCTs covered hereunder shall be performed in 
          accordance with this AGREEMENT and such changes thereto as are 
          subsequently authorized by a written Change Order issued by BELL 
          ATLANTIC and accepted by SUPPLIER. If BELL ATLANTIC is not in 
          agreement with the terms, conditions and charges specified in the 
          SUPPLIER's proposal, then the parties shall agree to negotiate in 
          good faith to come up with mutually agreeable terms for the Change 
          Order. Nothing in this clause shall excuse the SUPPLIER from 
          proceeding with the AGREEMENT as then in effect until it has 
          accepted a Change Order.

          11.4.B.  ADJUSTMENT LIMITATIONS

          Before the issuance of a Change Order under this AGREEMENT, BELL 
          ATLANTIC may request SUPPLIER's written agreement as to the maximum 
          (in case of an increase) or minimum (in case of a decrease) 
          adjustments to be made in the price and/or in the time of 
          performance, by reason of the change.  BELL ATLANTIC may also 
          request a written agreement limiting the adjustments to any other 
          provisions of the AGREEMENT which may be subject to equitable 
          adjustment by reason of the change.  Any such written agreement 
          shall then be cited in the Change Order, and upon its issuance 
          shall be deemed to become part of this AGREEMENT.  In making 
          equitable adjustments pursuant to this clause, in no event shall 
          the definitive adjustment exceed the maximum or be less than the 
          minimum price and/or time of performance adjustments so 
          established, nor otherwise be inconsistent with other adjustment 
          limitations so established.  Except with respect to such 
          limitations, nothing contained in this paragraph B shall affect the 
          SUPPLIER's rights to equitable adjustment by reason of the change 
          pursuant to this clause.

          11.4.C.  BELL ATLANTIC ASSISTANCE/ADVICE

          BELL ATLANTIC's engineering, technical, and administrative 
          personnel may from time to time render assistance or give technical 
          advice to, or effect an exchange of information with, SUPPLIER's 
          personnel in a liaison effort concerning the SYSTEM, PRODUCTS, 
          SOFTWARE or SERVICES to be furnished hereunder. However, such 
          exchange of information or advise shall not vest SUPPLIER with the 
          authority to change the PRODUCT, SOFTWARE or SERVICE(S) hereunder 
          or the provisions of the AGREEMENT, and no change in the PRODUCT or 
          SERVICE(S) or the provisions of the AGREEMENT shall be binding upon 
          BELL ATLANTIC unless incorporated as a change in accordance with 
          this Section or a written amendment to this AGREEMENT signed by the 
          parties.

          11.4.D.  REQUEST FOR INFORMATION

          Requests for information related to Change Orders shall be directed 
          to both Mr. Thomas Trempy, BELL ATLANTIC, Corporate Sourcing, 240 
          East 38th Street, 22d Floor, New York, N.Y. 10016; (212) 338- 6576, 
          and to the Bell Atlantic Engineer identified on the applicable 
          Order.

     11.5. STOP CHANGE ORDER

          11.5.A.  ISSUANCE

          BELL ATLANTIC may, at any time, by written order to the SUPPLIER (a 
          "Stop Work Order"), delivered in accordance with the notice 
          provisions of Section 19.7 hereof, require the SUPPLIER to stop all 
          or any part of the WORK called for by this AGREEMENT or applicable 
          ORDER(s) for a period of up to ninety (90) days after the Stop Work 
          Order is delivered to the SUPPLIER, and for any further period to 
          which the parties may agree not to exceed ninety (90) additional 
          days.  Any such order shall be specifically identified as a Stop 
          Work Order issued pursuant to this clause and shall automatically 
          extend the time of performance or the delivery date of such WORK 
          for a period equal to the period of the Stop Work Order.

          11.5.B.  COMPLIANCE

          Upon receipt of a Stop Work Order, the SUPPLIER shall forthwith 
          comply with its terms and take reasonable steps to minimize the 
          occurrence of costs allocable to the WORK covered by the Stop Work 
          Order during the

<PAGE>

                                                                  Page 15 of 38

          period of work stoppage. Within a period of  ninety (90) days after a
          Stop Work Order is delivered to the SUPPLIER, or within any extension
          of that period to which the parties shall have agreed, BELL ATLANTIC
          shall either:

          (i)  cancel the Stop Work Order, or 
          (ii) terminate the WORK covered by such Stop Work Order as provided in
               Article 9, entitled TERMINATION.

          11.5.C.  CANCELLATION OR EXPIRATION

          If a Stop Work Order issued under this clause is canceled or the 
          period of the Stop Work Order or any extension thereof expires, the
          SUPPLIER shall resume WORK.  An equitable adjustment shall be made in
          delivery schedule or the period of performance and in any other
          provisions of the AGREEMENT that may be affected, and the AGREEMENT
          shall be modified in writing accordingly, if:

          (i)  the Stop Work Order results in an increase in the time required
               for, or in the SUPPLIER's cost properly allocable to the 
               performance of any part of this AGREEMENT, and 
          (ii) the SUPPLIER asserts a claim for such adjustment within thirty
               (30) days after the end of the period of work stoppage.

          11.5.D.  TERMINATION OF WORK

          If a Stop Work Order is not canceled, the WORK covered by such Order
          shall be deemed terminated pursuant to Article 9, TERMINATION, of this
          AGREEMENT.

    11.6. EDI (ELECTRONIC DATA INTERCHANGE)

    SUPPLIER is committed to implementing an EDI solution in 1998.  SUPPLIER has
    installed an integrated financial and manufacturing system.  The independent
    supplier has an EDI module that will be available for installation in 1998.
    SUPPLIER is currently in the process of evaluating the EDI transactions
    which its software vendor includes in their EDI module, and the new system
    requirements to support them.  However, because the software is in the
    initial stage of deployment, SUPPLIER is unable to commit to a firm date for
    implementation.  Preliminary evaluation of the EDI product module, the
    resources required for the implementation, and any customization is
    currently underway. In an effort to accelerate an EDI implementation with
    BELL ATLANTIC, SUPPLIER would like to have BELL ATLANTIC name a resource
    that could be made available to discuss and review the transaction data
    transfer process. SUPPLIER will update BELL ATLANTIC as more information
    becomes available.

12. QUALITY ASSURANCE

    12.1.  QUALITY SYSTEM

    The SUPPLIER shall maintain a quality system which assures that the 
    SYSTEM(s), PRODUCT, SOFTWARE or SERVICES provided to BELL ATLANTIC meet
    in all material respects all performance standards and requirements
    referenced in this Section 12, and perform in all material respects as
    intended. In addition, subject to the exceptions noted in Appendix I,
    the SUPPLIER'S quality system shall satisfy the requirements in 
    TR-NWT-001252, Bell Communications Research Technical Reference, Quality
    System Generic Requirements, Issue 1, December 1992 for hardware design and
    manufacturing; and TR-TSY-000179, Bell Communications Research Technical
    Reference, Quality System Generic Requirements for SOFTWARE, Issue 2, June
    1993 for SOFTWARE design and development.

    SUPPLIER shall remain updated on all such performance standards and
    requirements referenced in this Section 12 and shall, at the discretion of
    BELL ATLANTIC, meet those updated standards and requirements upon ninety
    (90) days prior written notice, or if compliance is not possible within
    ninety (90) days using commercially reasonable efforts, SUPPLIER will draft
    a plan for compliance within the ninety (90) day period that in BELL
    ATLANTIC's  reasonable judgment has a reasonable opportunity of success.

    The SUPPLIER shall also adhere in all material respects to the following
    standards and requirements, as applicable, throughout the life of this
    AGREEMENT:
     
      TR-TSY-000078, Bell Communications Research Technical Reference, Physical
        Design and Test Requirements for Telecommunications PRODUCTS and 
        Equipment, Issue 3, December 1991.
      FR-NWT-000796, Bell Communications Research Framework, Reliability and
        Quality Generic Requirements (RQGR), Issue 3, June 1993 with the 
        exceptions noted in Appendix I.
      TR-NWT-000870, Bell Communications Research Technical Reference,
        Electrostatic Discharge Control in the Manufacture of Telecommunication
        Equipment, Issue 1, February 1991.
      TR-NWT-001037, Bell Communications Research Technical Reference,
        Statistical Process Control Program Generic Requirements, Issue 1,
        November 1990.

    For SOFTWARE design, development and delivery under this AGREEMENT, the 
    SUPPLIER shall adhere in all material respects to the following 
    requirements:

<PAGE>
                                                                  Page 16 of 38


      GR-282-CORE, Bell Communications Research Generic Requirements, SOFTWARE
        Reliability and Quality Acceptance Criteria (SRQAC), Issue 1, December
        1994 with the exceptions noted in Appendix I.
      GR-1315-CORE, Bell Communications Research Generic Requirements, In-
        Process Quality Metrics (IPQM), Issue 1, September 1995 with the 
        exceptions noted in Appendix I.

    SUPPLIER will review specific requirements for QPS 88.010, Bell 
    Communications Research Quality Program Specification, Quality Assurance
    Surveillance Program for SOFTWARE - General, Issue 6, November 1991 when
    requested by BELL ATLANTIC.

    12.2.  QUALITY PERFORMANCE REPORTING

    The SUPPLIER agrees to provide on request from BELL ATLANTIC, at no cost to
    BELL ATLANTIC, regular data reports satisfying the requirements of 
    TR-NWT-1323. SUPPLIER will review the requirement for all other reports when
    specifically requested by BELL ATLANTIC. The following requirements for 
    collecting, calculating and reporting data shall be followed in all material
    respects:

      GR-929-CORE, Bell Communications Research Generic Requirements, 
        Reliability and Quality Measurements for Telecommunications SYSTEMS
        (RQMS), Issue 1 - Revision 1, December 1995.  Note:  the Conditional
        Requirements of Sections 3.4.9.1, 3.4.9.2, 3.4.9.3 , shall be required.
      TR-NWT-001323, Bell Communications Research Technical Reference, SUPPLIER
        Data - Comprehensive Generic Requirements, Issue 1 November 1993.
      TR-NWT-001359, Bell Communications Research Technical Reference, SUPPLIER
        Data -Basic Generic Requirements, Issue 1, June 1993. 

    All required reports and data shall be delivered to BELL ATLANTIC's Supplier
    Quality Organization at:

                              Supplier Quality Leader
                              240 E 38 ST., 14th floor
                                 New York, NY 10016

    SUPPLIER agrees to render other reasonable periodic reports for service
    affecting conditions or other conditions that affect the operations and
    administrative procedures of BELL ATLANTIC or its AFFILIATES, or as
    otherwise reasonably requested by BELL ATLANTIC.  SUPPLIER will review
    specific requirements when requested by BELL ATLANTIC.

    All provided information shall be classified as proprietary to BELL ATLANTIC
    and SUPPLIER.

    12.3.  SOURCE INSPECTION

    BELL ATLANTIC shall have the right to conduct reasonable due diligence
    inspection and testing of any PRODUCT and/or SOFTWARE at the SUPPLIER's
    facilities during business hours upon reasonable prior written notice.
    SUPPLIER shall use commercially reasonable efforts to provide BELL ATLANTIC
    with similar access to the facilities of its subcontractors.  When requested
    by BELL ATLANTIC, SUPPLIER will furnish BELL ATLANTIC with the appropriate
    documentation regarding  the PRODUCT's conformance to all contractual
    specifications, and the SUPPLIER'S projected failure rate, along with the
    test data that substantiates the conformance of PRODUCT and/or SOFTWARE
    prior to shipment.  BELL ATLANTIC does reserve the right to perform
    confirmation of data  submitted at the SUPPLIER's facility at a mutually
    agreeable time. In such case, SUPPLIER shall provide, without charge, any
    production testing facilities and personnel reasonably required to inspect
    and test the PRODUCT and/or SOFTWARE as described in QPS 70.001-N, BELL
    ATLANTIC Quality Program Specification, "Quality Assurance Procedures
    Applicable to PRODUCT as Specified on the Order", Issue 2, June 1993,
    to determine that the PRODUCT and/or SOFTWARE meets the requirements of the
    applicable contractual specification and/or ORDER.

    Where BELL ATLANTIC Supplier Quality Management finds received PRODUCTS do
    not substantially meet contractual requirements, the actual and reasonable
    out-of-pocket costs of inspection and testing, replacement and shipping
    such non-conforming PRODUCTS shall be reimbursed by  SUPPLIER.

    BELL ATLANTIC reserves the right to have the SUPPLIER inspect 100% of its
    PRODUCT for some mutually agreeable period of time at its cost in cases
    where PRODUCT does not substantially meet contractual specifications.

    12.4.  PACKING

    Adequate protective packing and any special packing required by law or
    governmental regulation for domestic shipment shall be furnished by SUPPLIER
    at no additional charge for PRODUCT purchased, repaired, replaced or 
    refurbished hereunder.

    The SUPPLIER shall adhere in all material respects to the following
    requirements for packaging of PRODUCTS and or SOFTWARE:

      ME-000047NX, NYNEX Specification, Packing, Packaging and Palletization,
        Issue 7, November 1991.

<PAGE>

                                                                  Page 17 of 38

      GR-1421-CORE, Bell Communications Research Generic Requirements, ESD-
        Protective Circuit Pack Containers, Issue 2, June 1995.  *Note that
        Conditional/Objective Requirements CR4-33, O4-34, O4-41, O4-42, O4-54,
        CR4-56, and O4-57 shall be required.

    12.5.  MARKING

    All PRODUCT and/or related packaging furnished hereunder shall be marked for
    identification purposes with part number, or Comcode number, and/or 
    SUPPLIER's Model/Serial number as applicable.

    In addition SUPPLIER agrees to adhere in all material respects to the
    following:

      NX-00008TRG, NYNEX Specification, Marking Specification, Issue 7, 
        September 1993.

      ST-STS-000124, Bell Communications Research Technical Reference, Common
        Language Codes for Frame Identification, Issue 1, February 1989.
      TR-STS-000383, Bell Communications Research Technical Reference, Generic
        Requirements for Common Language Bar Code Labels, Issue 5, January 1991.
      GR-485-CORE, Bell Communications Research Generic Requirements, Common
        Language Equipment Coding Processes and Guidelines, Issue 2, October
        1995.
      QPS 94.890, Bell Communications Research Quality Program Specification,
        Common Language Equipment Identification (CLEI)/Bar Code Labels, Issue
        4, February 1990.

    12.6.  TECHNICAL SUPPORT

    Technical Support shall include at least the following: field service and
    assistance, replacement and repair parts and/or repair SERVICES or PRODUCT,
    SERVICES and SOFTWARE; provided however, that the availability or 
    performance of this Technical Support SERVICE shall not be construed as
    reducing SUPPLIER's obligations as set forth in the clause entitled
    "WARRANTIES" or elsewhere provided for in this AGREEMENT.

           12.6.A.  FULL CUSTOMER SUPPORT DURING ENGINEERING, INSTALLATION AND
                    CONVERSION PERIODS

           Prior to installation and during installation, testing and acceptance
           periods, subject to the terms of Appendix E hereof, entitled
           ENGINEERING, INSTALLATION AND INSTALLATION SUPPORT, BELL ATLANTIC 
           and/or BELL ATLANTIC's agent shall be provided installation and
           technical support SERVICES and  DOCUMENTATION as specified below:

           1.  Twenty-four (24) hours per day, seven (7) days per week, SUPPLIER
               shall provide telephonic technical support SERVICES from its
               Technical Assistance Center (TAC) utilizing SUPPLIER's technical
               information for installation, testing, operation, maintenance,
               use, and analysis, all at no charge to BELL ATLANTIC.  SUPPLIER
               shall provide, upon request, on-site technical personnel during
               cutover/in-service weekend 24 hours post cutover/in-service to
               ensure SYSTEM performance, at no charge to BELL ATLANTIC.

          2.   SUPPLIER agrees that in the event PRODUCT and/or SOFTWARE does
               not perform substantially in accordance with the SPECIFICATIONS,
               then SUPPLIER will provide on-site technical support, at no
               charge to BELL ATLANTIC.

          3.   SUPPLIER shall provide at no charge, as requested by BELL
               ATLANTIC, a project manager to represent SUPPLIER on all
               installation and technical support matters.

          4.   Requests by BELL ATLANTIC for non-emergency acceptance assistance
               must be made at least five (5) days prior to the scheduled date.

           12.6.B.  CUSTOMER SUPPORT POST ACCEPTANCE

           After acceptance of PRODUCT and/or SOFTWARE by BELL ATLANTIC, 
           SUPPLIER shall provide on-going, in-service technical support
           SERVICES and DOCUMENTATION as specified below:

                    1.   IN WARRANTY

                         a.   SUPPLIER shall make available telephonic Technical
                              Assistance Center (TAC) SERVICE, twenty-four (24)
                              hours per day, seven (7) days per week, utilizing
                              SUPPLIER's technical information for installation,
                              testing, operation, maintenance, use, and
                              analysis, all at no charge to BELL ATLANTIC.

                         b.   In the event of an emergency or service-affecting
                              condition involving the SYSTEM, SUPPLIER shall
                              provide immediate technical support and shall work
                              continuously until such emergency and/or service-
                              affecting condition is remedied.  On-site
                              technical support within twenty four (24) hours
                              shall be provided by SUPPLIER upon request of BELL
                              ATLANTIC. On-site assistance required to correct a
                              problem or defect under warranty shall be at no
                              charge to BELL ATLANTIC. Notwithstanding the
                              foregoing, in the event

<PAGE>

                                                                  Page 18 of 38

                              that on-site technical support is provided for a
                              non-warranty defect, BELL ATLANTIC will be charged
                              for such on-site technical support at the standard
                              On-Site Technical Support rate as shown in 
                              Appendix A.

                    2.   OUT OF WARRANTY

                         a.   SUPPLIER shall make available telephonic Technical
                              Assistance Center (TAC) SERVICE, twenty-four (24)
                              hours per day, seven (7) days per week, utilizing
                              SUPPLIER's technical information for installation,
                              testing, operation, maintenance, use, and
                              analysis, at the Supplier Technical Support rates
                              set forth in Appendix A.

                         b.   Non-warranty technical support SERVICE charges 
                              shall be as shown in Appendix A.  On site
                              technical assistance within twenty four (24) hours
                              shall be provided by SUPPLIER upon request by BELL
                              ATLANTIC. 

                         c.   In the event of an emergency or service-affecting
                              condition involving the SYSTEM, SUPPLIER shall
                              provide immediate Technical support and shall work
                              continuously until such emergency and/or
                              servicing-affecting condition is remedied.

                         BELL ATLANTIC may call the following telephone 
                         number(s) for emergency technical assistance or TAC
                         Support, or to escalate any problem at any time
                         interval: 1-800-774-8327.  In furtherance of this
                         procedure, SUPPLIER shall provide BELL ATLANTIC with an
                         escalation procedure and list within  thirty (30) days
                         of execution of this AGREEMENT by BELL ATLANTIC and
                         SUPPLIER, that is agreed upon and satisfactory, as well
                         as keep BELL ATLANTIC updated as to all changes to such
                         procedure and list. For additional technical
                         information, BELL ATLANTIC may contact SUPPLIER's
                         technical assistance SERVICES on 1-800-774-8327. 

                         In addition to SUPPLIER's obligations under Article 13
                         entitled WARRANTIES hereof, BELL ATLANTIC shall be
                         entitled to technical maintenance and support at
                         Supplier's then current fees and charges for a period
                         of *after expiration or termination of this AGREEMENT.

    12.7.  ENGINEERING COMPLAINTS

    The SUPPLIER shall handle all engineering complaints ("ECs") submitted by
    BELL ATLANTIC in accordance with Bell Communications Research Generic
    Requirements, GR-230-CORE, "Generic Requirements for Engineering
    Complaints", Issue 1, September 1994.

    Upon receipt of an EC identified as a fire or safety hazard, SUPPLIER
    agrees to acknowledge receipt of such EC immediately. This response shall
    be followed up promptly with an additional response outlining the
    implementation and execution of the accepted resolution of   or corrective
    action to resolve the stated problem, or the date when the accepted solution
    will be completed.

    In the event that a BELL ATLANTIC EC is marked "SERVICE EMERGENCY," then
    SUPPLIER agrees to exert effort which goes beyond that which is customarily
    provided to resolve the EC.  Such effort will be consistent with the level
    of effort SUPPLIER will furnish to support BELL ATLANTIC under Section 12.9
    entitled REPAIRS AND REPLACEMENT, and Section 18.2 entitled EXTRAORDINARY
    SUPPORT.

    In the event the SUPPLIER anticipates that the solution to the EC will
    exceed thirty (30) days, then SUPPLIER shall issue bi-weekly EC Interim
    Reports to BELL ATLANTIC, reporting actions taken and progress made during
    the reporting period.  In addition, such reports will indicate the date by
    which SUPPLIER anticipates that the ongoing EC study will be successfully
    concluded.  This requirement modifies GR-230-CORE, Section 2.3.2.2.

    Upon acceptance of SUPPLIER's resolution by BELL ATLANTIC, SUPPLIER shall
    implement necessary changes within thirty (30) days or if changes cannot be
    implemented in the time period, mutually agree on a proposal for resolution
    within thirty (30) days, whereas such approval will not be unreasonably
    withheld.

    If BELL ATLANTIC disagrees with SUPPLIER on the implementation schedule
    and/or resolution of an EC, BELL ATLANTIC shall have the right to escalate
    the matter for review and/or resolution to higher management in accordance
    with the Alternate Dispute Resolution clause of this AGREEMENT.

    BELL ATLANTIC's point of contact for all EC information and correspondence
    shall be:

                              Supplier Quality Leader
                                   BELL ATLANTIC
                          240 East 38th Street, 14th Floor
                              New York, New York 10016


   * Confidential portion has been omitted and filed separately with the 
     Secretary of the Commission.


<PAGE>
                                                                  Page 19 of 38
                                  
    12.8.  CHANGES TO PRODUCT OR SOFTWARE CHANGE NOTICES ("PCNS")

    SUPPLIER shall notify BELL ATLANTIC in writing of any changes to PRODUCT 
    and/or SOFTWARE in accordance with Bell Communications Research, 
    GR-209-CORE, "Generic Requirements for PRODUCT Change Notices", Issue 2, 
    January 1996.  In addition, the following provisions shall apply:

    -    SUPPLIER shall propose a schedule for the application of these changes
         at all PRODUCT or SOFTWARE locations, which schedule shall be mutually
         agreed upon with BELL ATLANTIC and its AFFILIATE prior to 
         implementation.

    -    If SUPPLIER develops a Method Of Procedure (MOP) for the change, the
         MOP shall be provided to BELL ATLANTIC with the PCN.

    -    Any related Engineering Complaint Number shall be included on the PCN
         form.

    -    If BELL ATLANTIC disagrees with the nature of, or with the 
         classification which SUPPLIER assigns to, a change in PRODUCT or
         SOFTWARE, BELL ATLANTIC shall have the right to escalate the matter
         for review, reclassification, and resolution to higher levels of
         management in accordance with the Alternate Dispute Resolution clause
         of this AGREEMENT.

    -    SUPPLIER shall provide all changed PRODUCT, SOFTWARE, and DOCUMENTATION
         for Class A and AC changes caused by a material defect in the PRODUCT
         OR SOFTWARE for a period of *from the date of last shipment of the
         affected PRODUCT or SOFTWARE, at no charge to BELL ATLANTIC. 

    -    DOCUMENTATION changes, required to satisfy SUPPLIER's obligations to
         provide Class A and AC changes to PRODUCT or SOFTWARE as specified
         herein, shall be provided by SUPPLIER at no charge to BELL ATLANTIC.

    -    For those changes classified as "B" or "D", SUPPLIER shall notify BELL
         ATLANTIC in writing sixty (60) days prior to the effective date of such
         change to be made in the PRODUCT or SOFTWARE furnished under an ORDER.

    -    SUPPLIER shall notify BELL ATLANTIC in writing when implementation of
         each field change has been completed at all affected locations.

    All correspondence relating to changes to PRODUCT or SOFTWARE shall be sent
    to the following individual or his successor(s) as appointed by BELL 
    ATLANTIC and identified to SUPPLIER in writing in accordance with Section
    19.7:
                                  Ms. Deborah Eury
                              Supplier Quality Leader
                                   BELL ATLANTIC
                           240 East 38th St., 14th. Floor
                                New York, N.Y. 10016

    12.9.  REPAIRS AND REPLACEMENT

           12.9.A.  REPAIR AND REPLACEMENT PROCEDURES

           SUPPLIER shall adhere in all material respects to QPS 82.061, Bell
           Communications Research Quality Program Specification, Repair and
           Return Operations of Telecommunications PRODUCTS - General, Issue 2,
           March 1985, or the most current issue of Bell Communications Research
           Quality Program Specification relating thereto, when repairing 
           PRODUCT and/or SOFTWARE.

           BELL ATLANTIC shall furnish the following information with PRODUCT or
           SOFTWARE returned to SUPPLIER for repair:

           (1)  BELL ATLANTIC's  name and complete address;
           (2)  name(s) and telephone number(s) of BELL ATLANTIC's employee(s)
                to contact in case of questions about the PRODUCT or SOFTWARE
                to be repaired;
           (3)  reference to BELL ATLANTIC's ORDER number, if applicable;
           (4)  ship to address for return of repaired or replacement PRODUCT
                or SOFTWARE if different from (1);
           (5)  a complete list of PRODUCT or SOFTWARE returned;
           (6)  the nature of the defect or failure, if known.

           PRODUCT or SOFTWARE repaired by SUPPLIER shall have the repair
           completion date stenciled or otherwise identified in a permanent
           manner at a readily visible location on the PRODUCT or SOFTWARE
           to the extent practicable; otherwise it shall be indicated in
           DOCUMENTATION accompanying the PRODUCT and/or SOFTWARE. The repaired
           PRODUCT and/or SOFTWARE shall be returned with a tag or other
           DOCUMENTATION affirming that the required repairs have been made.


           * Confidential portion has been omitted and filed separately with 
             the Secretary of the Commission.

<PAGE>

                                                                  Page 20 of 38

           SUPPLIER shall maintain a record of all No Trouble Founds ("NTFs")
           which permits tracking of NTFs to assure that any PRODUCT or SOFTWARE
           that has been categorized as an NTF for the third time is not
           returned to BELL ATLANTIC of its AFFILIATES for future deployment.

           When requested in the ORDER, SUPPLIER shall hold replaced parts for
           inspection and resale to BELL ATLANTIC at prices and terms to be
           agreed upon.

           SUPPLIER acknowledges that this AGREEMENT does not grant SUPPLIER an
           exclusive privilege to repair any or all of the PRODUCT or SOFTWARE
           purchased and/or licensed hereunder for which BELL ATLANTIC may
           require repair.  BELL ATLANTIC acknowledges that repair of any or all
           of the PRODUCT or SOFTWARE by anyone other than SUPPLIER may void the
           warranties set forth in Section 13.

           12.9.B.  PRE-ACCEPTANCE

           During the installation of PRODUCT and SOFTWARE ordered under this
           AGREEMENT or after installation, but before notification of
           acceptance by BELL ATLANTIC, defective PRODUCT or SOFTWARE will be
           replaced with new PRODUCT or SOFTWARE, at no charge to BELL ATLANTIC
           (provided that any such defect shall not have been caused by the
           installation of the PRODUCT or SOFTWARE by BELL ATLANTIC, one of
           its AFFILIATES or AFFILIATE'S agents).  SUPPLIER shall ship such new
           PRODUCT or SOFTWARE to a location specified by BELL ATLANTIC within
           five (5)  business days of receipt of notice by SUPPLIER.  For
           purposes of this AGREEMENT, "new PRODUCT" or "new SOFTWARE" shall
           mean PRODUCT or SOFTWARE directly from the manufacturing assembly
           line or from SUPPLIER's finished goods inventory, provided that said
           PRODUCT has not been previously repaired or reconditioned.

           BELL ATLANTIC shall return any such defective new PRODUCT or SOFTWARE
           within thirty (30) days after receipt of replacement PRODUCT or 
           SOFTWARE. If defective new PRODUCT or SOFTWARE is not received at
           SUPPLIER's repair facility within forty-five (45) days after shipment
           of replacement PRODUCT or SOFTWARE, SUPPLIER will invoice for the
           PRODUCT or SOFTWARE.

           All transportation charges for new PRODUCT or SOFTWARE returned to
           SUPPLIER for repair/replacement shall be borne by SUPPLIER. All risk
           of in-transit loss or damage to new PRODUCT or SOFTWARE returned to
           SUPPLIER for repair/replacement shall be borne by BELL ATLANTIC.

           12.9.C.  IN WARRANTY

           The following provisions define the obligations of the parties in the
           event a breach of warranty occurs in PRODUCT or SOFTWARE during the
           applicable Warranty Period, as described in Article 13, entitled
           WARRANTIES.

          (1)  BELL ATLANTIC must notify SUPPLIER in writing of the claimed
               defect or non-conformity not later than ten (10) days after the
               expiration of the applicable Warranty Period.

          (2)  SUPPLIER shall provide written instructions covering return of 
               such defective PRODUCT or SOFTWARE.

          (3)  SUPPLIER shall:

               a)   at SUPPLIER's option, either repair, replace or correct the
                    PRODUCT or SOFTWARE without charge at its manufacturing or
                    repair facility within fifteen (15) working days from the
                    date the PRODUCT or SOFTWARE is received at SUPPLIER's 
                    repair facility.  Where defective or nonconforming PRODUCT
                    or SOFTWARE is readily returnable, it shall be removed and
                    sent to SUPPLIER by BELL ATLANTIC in accordance with
                    instructions for return of PRODUCT or SOFTWARE provided by
                    SUPPLIER in (B) (2) above, at BELL ATLANTIC's expense. If
                    repaired or replaced, SUPPLIER shall return the PRODUCT or
                    SOFTWARE to BELL ATLANTIC at a destination within the 
                    contiguous forty-eight United States designated by BELL
                    ATLANTIC at SUPPLIER's expense; or 

               b)   if the PRODUCT or SOFTWARE is not repairable or 
                    replaceable, or is not correctable, at the option of BELL 
                    ATLANTIC or BELL ATLANTIC's AFFILIATE provide a refund or 
                    credit of all monies paid for the PRODUCT or SOFTWARE.

               c)   Notwithstanding the provisions of (b) above, if the PRODUCT
                    and SOFTWARE subject to defect or non-conformity is
                    determined to be repairable but not readily returnable for
                    repair, SUPPLIER shall, at BELL ATLANTIC's option, either
                    repair the PRODUCT or SOFTWARE at BELL ATLANTIC's or its 
                    AFFILIATE's site without charge, or remove the PRODUCT or
                    SOFTWARE from BELL ATLANTIC's or its AFFILIATE's site and
                    replace the PRODUCT or SOFTWARE at no charge to BELL 
                    ATLANTIC.

               d)   If requested, SUPPLIER shall ship to BELL ATLANTIC
                    replacement PRODUCT or SOFTWARE within five (5) business
                    days of such request to BELL ATLANTIC's designated location.
                    BELL ATLANTIC shall return defective PRODUCT or SOFTWARE
                    within thirty (30) days after receipt

<PAGE>

                                                                  Page 21 of 38

                    of replacement PRODUCT or SOFTWARE.  At the time of the
                    request, BELL ATLANTIC will provide SUPPLIER with a Purchase
                    ORDER for the purchase price of the replacement PRODUCT or
                    SOFTWARE to be shipped.  If defective PRODUCT or SOFTWARE is
                    not received at SUPPLIER's repair facility within forty-five
                    (45) days after shipment of replacement PRODUCT or SOFTWARE,
                    SUPPLIER will invoice for the PRODUCT or SOFTWARE.

           12.9.D.  OUT OF WARRANTY

           The following provisions define the obligations of the parties in
           the event repairs or replacements of PRODUCT or SOFTWARE are 
           necessary after the applicable Warranty Period has expired.
 
           SUPPLIER agrees to provide repair or replacement SERVICES and
           replacement parts for all PRODUCT and SOFTWARE ordered hereunder
           at the prices in Appendix A hereto, entitled PRICES, SCHEDULES,
           DISCOUNTS, for the effective period of the AGREEMENT and
           thereafter at SUPPLIER's current list prices, as long as SUPPLIER
           is still furnishing such PRODUCT and SOFTWARE; or repair parts 
           therefor, but in no event for less than the minimum support periods
           set forth in Section 18.1 hereof entitled CONTINUING AVAILABILITY.
 
          (1)  BELL ATLANTIC must notify SUPPLIER in writing of the claimed
               defect or non-conformity.

          (2)  SUPPLIER shall provide written instructions covering return of
               such defective PRODUCT or SOFTWARE.

          (3)  If the defective PRODUCT or SOFTWARE  is readily returnable, it
               shall be removed and sent to SUPPLIER by BELL ATLANTIC in
               accordance with instructions for return of PRODUCT or SOFTWARE
               provided by SUPPLIER, at BELL ATLANTIC's or its AFFILIATE's
               expense and BELL ATLANTIC's or its AFFILIATE's risk of loss or
               damage. SUPPLIER shall  repair, replace or correct the PRODUCT or
               SOFTWARE at its manufacturing or repair facility within fifteen
               (15) working days from the date the PRODUCT or SOFTWARE is
               received at SUPPLIER's facility or pursuant to such other
               mutually agreeable schedule. If the defective PRODUCT or SOFTWARE
               is repaired or replaced, SUPPLIER shall return the PRODUCT or
               SOFTWARE to BELL ATLANTIC at a destination within the contiguous
               forty-eight United States designated by BELL ATLANTIC at
               SUPPLIER's expense.

          (4)  If the PRODUCT and SOFTWARE subject to defect or non-conformity
               is determined to be repairable but not readily returnable for
               repair (or either party requests that the repair of readily
               returnable PRODUCT or SOFTWARE be performed on-site), SUPPLIER
               shall, at its option,  either repair the PRODUCT or SOFTWARE at
               BELL ATLANTIC's or its AFFILIATE's site at prices specified in
               Appendix A hereto entitled PRICES, SCHEDULES, DISCOUNTS for the
               on-site repair SERVICE plus travel and living expenses for the
               repair personnel, or remove the PRODUCT or SOFTWARE from BELL
               ATLANTIC's site and replace and install the replacement PRODUCT
               or SOFTWARE at prices specified in Appendix A  hereto entitled
               PRICES, SCHEDULES, DISCOUNTS.  All on-site repairs or 
               replacements shall be made pursuant to mutually agreed upon
               schedules.

          (5)  If PRODUCT or SOFTWARE is returned to SUPPLIER for repair as
               provided for in this clause, and is determined to be beyond 
               repair, or repair costs are expected to exceed fifty percent
               (50%) of the cost of replacement, SUPPLIER shall so notify BELL
               ATLANTIC prior to making the repair.

          Invoices originated by SUPPLIER for repair SERVICES for PRODUCT or
          SOFTWARE out of warranty must be clearly identified as such, and must
          contain:

               a)   a reference to BELL ATLANTIC's ORDER for these repair 
                    SERVICES;
               b)   a description of SERVICES rendered by SUPPLIER; and
               c)   an itemized listing of parts and labor charges, when repairs
                    are done on a time and materials basis.

          If requested by BELL ATLANTIC, SUPPLIER shall dispose of unrepairable
          PRODUCT or SOFTWARE, consistent with sound commercial practices, and
          remit to BELL ATLANTIC the net salvage value received by SUPPLIER, if
          any.

           12.9.E.  EMERGENCY "OUT OF SERVICE" CONDITIONS. 

           So long as SUPPLIER is providing regular repair service as set forth
           in (C) and (D) above, SUPPLIER shall provide emergency replacement
           service and on-site repairs, in the event of an emergency out of
           service condition caused by defective PRODUCT or SOFTWARE.  SUPPLIER
           will start repairs or ship a new, or functionally equivalent
           replacement, within twenty four (24) hours or as soon as is
           reasonably possible after receipt of verbal notification.  If BELL
           ATLANTIC is not satisfied with the emergency replacement service
           and/or on site repairs, BELL ATLANTIC shall have the right to
           escalate the matter for review and expeditious resolution to higher
           levels of management pursuant to the Alternate Dispute Resolution
           clause of this AGREEMENT.

<PAGE>

                                                                 Page 22 of 38

     12.10  DETAIL ENGINEERING, OFFICE RECORDS 
                                         
     When detail engineering is performed by the SUPPLIER as part of the 
     SERVICES, the SUPPLIER shall be responsible for all detail 
     engineering and agrees to use a BELL ATLANTIC certified or approved 
     detail engineering sub-contractor to provide full detail engineering 
     SERVICES, consisting of writing a detailed specification, creating 
     and/or updating central office drawings and records, including the 
     Equipment Inventory Update ("EIU") form and the ordering of all 
     PRODUCTs and equipment needed to complete the job in compliance to 
     BELL ATLANTIC requirements, methods, procedures and standards.
                                       
     When detail engineering is performed by BELL ATLANTIC, its AFFILIATES 
     and/or its AFFILIATE agents in connection with the SERVICES to be 
     rendered  by SUPPLIER hereunder, the SUPPLIER shall provide 
     engineering support  by making available to  BELL ATLANTIC, its 
     AFFILIATES and/or its AFFILIATE agents, all DOCUMENTATION and 
     drawings as may be necessary to engineer the equipment into the 
     network, at no additional cost.
                                       
     12.11   INSTALLATION BY SUPPLIER 

     If requested in an ORDER, SUPPLIER shall provide full installation 
     SERVICES as described in Appendix E (Engineering, Installation and 
     Installation Support) using a certified supplier as a sub-contractor. 
     During installation, BELL ATLANTIC shall be given the opportunity to 
     observe, witness and review the tests performed by SUPPLIER's 
     installation forces, and review all test results and trouble reports 
     to ensure conformity to SPECIFICATIONS.  BELL ATLANTIC shall have 
     early access to the SYSTEM to perform joint testing with SUPPLIER, as 
     well as BELL ATLANTIC's and/or its AFFILIATES' own independent 
     testing of work completed by SUPPLIER.
                                       
     When SUPPLIER completes installation SERVICES hereunder, SUPPLIER 
     shall provide to BELL ATLANTIC a Notice of Installation Completion, 
     in writing, which may include electronic transmission or similar 
     communications.
                                       
     12.12   INSTALLATION BY BELL ATLANTIC, ITS AFFILIATES OR AFFILIATE'S 
             AGENTS

          12.12.A  INSTALLATION INTERVAL AND DOCUMENTATION

          Except for those installation SERVICES which are to be 
          performed by SUPPLIER as identified in Appendix E hereto, 
          entitled ENGINEERING, INSTALLATION AND INSTALLATION SUPPORT 
          or as would be performed under Article 11.4 of this 
          AGREEMENT, entitled CHANGE ORDER, all Installation will be 
          performed by BELL ATLANTIC or a certified supplier 
          contracted by BELL ATLANTIC. 

          When installation of PRODUCT and/or SOFTWARE is performed by BELL 
          ATLANTIC and/or its AFFILIATE's agent, BELL ATLANTIC, its AFFILIATE 
          and/or AFFILIATE's agent will be granted an installation  interval 
          equal to SUPPLIER's standard installation interval for such PRODUCT 
          and/or SOFTWARE. At the completion of the installation interval, 
          the Acceptance Period will begin (as defined in 12.13 below). 

          SUPPLIER shall furnish at no charge to BELL ATLANTIC SUPPLIER's 
          customary and current, updated relevant and complete DOCUMENTATION 
          to support BELL ATLANTIC, its AFFILIATE's and/or agent's 
          installation, acceptance, turnover, cutover/in-service, and  
          maintenance.
                                    
          12.12.B INSTALLATION PROCEDURES

          SUPPLIER shall meet with BELL ATLANTIC (Early Job 
          Conferences, contact meetings, test and analysis meetings) 
          to collect all essential information needed and to jointly 
          prepare a Method of Procedure (MOP) regarding the 
          installation. SUPPLIER, BELL ATLANTIC and/or its AFFILIATE's 
          agent shall plan all aspects of the job and a sequence of 
          performance to complete the job on schedule, which is 
          understood and mutually agreeable to both parties.  All job 
          requirements should be discussed, resolved and approved by 
          BELL ATLANTIC at these preliminary meetings, including 
          schedules (ordering, installation start, in-progress job 
          status, completion, etc.), quality, technical and 
          performance issues, workmanship, and acceptance testing.  
                                       
     12.13.  ACCEPTANCE  

     The SYSTEM(s), PRODUCT, SOFTWARE and SERVICES to be furnished or 
     delivered pursuant to ORDER(s) issued under this AGREEMENT shall be 
     subject to acceptance as follows:
                                       
     Upon completion of the installation, BELL ATLANTIC will  be granted 
     up to a thirty (30) day period (Acceptance Period) to test for 
     substantial conformance with SPECIFICATIONS utilizing SUPPLIER's 
     standard acceptance test procedures and BELL ATLANTIC's and/or its 
     AFFILIATE's own independent requirements, standards and testing 
     procedures.  Upon successful completion of such testing, BELL 
     ATLANTIC will issue a Notice of Acceptance to SUPPLIER. In the event 
     a Notice of Defects has been issued by BELL ATLANTIC, SUPPLIER shall 
     start to correct defects within ninety-six (96) hours of such Notice, 
     as set forth in Section 12.9 hereof entitled REPAIRS AND REPLACEMENT. 
     Upon completion of such corrective actions by SUPPLIER, BELL ATLANTIC 
     shall have the 

<PAGE>

                                                                 Page 23 of 38

     opportunity to retest the new or replacement PRODUCT and/or SOFTWARE. 
     Time required by SUPPLIER to correct deficiencies and for BELL 
     ATLANTIC to retest the new PRODUCT and/or SOFTWARE shall not apply to 
     the thirty (30) day Period of Acceptance.
                                       
     12.14.  INFORMATION KEPT CURRENT 
                                         
     On a continuing basis SUPPLIER shall provide, at no charge to BELL 
     ATLANTIC, Installation Alerts and Broadcast Warnings, PRODUCT Change 
     Notices, and DOCUMENTATION for changes to PRODUCT, SOFTWARE, 
     non-conformance to SPECIFICATIONS, service affecting items, 
     acceptance and installation issues. SUPPLIER will review specific 
     requirements for additional notices when requested by BELL ATLANTIC.  
     SUPPLIER shall establish and maintain a list of BELL ATLANTIC's 
     and/or its AFFILIATES and/or AFFILIATE's agent's personnel and 
     organizations responsible for each SYSTEM installation and shall 
     promptly provide Installation Alerts and Broadcast Warnings necessary 
     to support PRODUCT and SOFTWARE supplied by SUPPLIER during the 
     Acceptance Period and thereafter for a period of *at no charge to 
     BELL ATLANTIC.
                                       
     For each ORDER placed, SUPPLIER shall be accountable to BELL ATLANTIC 
     to advise them of the shipping and delivery status of each ORDER 
     placed, to maintain shipping intervals, and to provide repairs and 
     replacement for PRODUCT and/or SOFTWARE, as set forth in this 
     AGREEMENT.  If BELL ATLANTIC is not satisfied with such shipping and 
     delivery status and/or on-site repairs, BELL ATLANTIC shall have the 
     right to escalate the matter for review and expeditious resolution to 
     higher levels of management in accordance with the Alternate Dispute 
     Resolution provision of this AGREEMENT.
                                       
     12.15   CORRECTIVE ACTION 
                                         
     In any case where a material portion of any particular  PRODUCT or 
     SERVICE does not substantially meet the SPECIFICATIONS, the SUPPLIER 
     shall respond with a documented Corrective Action plan.  The plan 
     shall address the unacceptable condition with a root cause analysis 
     of the problem, the proposed solution, the process modification to 
     prevent reoccurrence, the time frame for the changes, and the 
     person(s) responsible for the implementation of the plan.
                                       
     The Corrective Action plan shall be presented to BELL ATLANTIC's 
     Supplier Quality Organization for concurrence prior to 
     implementation. 
                                       
     12.16.  CONTINUOUS IMPROVEMENT PLAN [SOFTWARE QUALITY IMPROVEMENT PLAN
             ("SQIP")
                                         
     SUPPLIER shall have a documented plan for continuously assessing and 
     improving the quality and reliability of PRODUCT and SOFTWARE used in 
     network applications.  SUPPLIER's Software  Quality Improvement Plan 
     (SQIP) shall (i) incorporate a documented set of metrics, reasonably 
     acceptable to BELL ATLANTIC, that will assess internal development 
     data and field performance data in order to improve SUPPLIER's 
     on-line performance for PRODUCTS deployed in BELL ATLANTIC and (ii) 
     conduct metric collection, analysis and reporting on a continual 
     basis. 
                                       
     SUPPLIER also shall perform a Post Mortem analysis after each major 
     SOFTWARE release.  Such analysis should determine which development 
     stage activities were accomplished smoothly and which activities 
     contributed to problems that effected quality or scheduling.  Results 
     of the analysis should yield documented process improvement plans 
     which will be implemented before development of the next release 
     begins.
                                       
     All information in SUPPLIER's SQIP shall be made available for 
     semi-annual review by BELL ATLANTIC.  This includes, but is not 
     limited to, plans, procedures and results.
                                          
13.     WARRANTIES
                                          
     13.1    WARRANTY OF TITLE   

     SUPPLIER warrants that it shall have as of the Acceptance  Date of 
     each PRODUCT free and clear title to, and the right to possess, use, 
     sell, transfer, assign, any and all PRODUCTS that are sold or 
     otherwise provided to BELL ATLANTIC by SUPPLIER pursuant to this 
     AGREEMENT. SUPPLIER warrants that it shall have as of the Acceptance 
     Date of any LICENSED MATERIALS, and throughout any applicable license 
     term hereunder, including any renewals or extensions hereof, free and 
     clear title to, and the right to possess, license or sublicense any 
     and all LICENSED MATERIALS that are licensed or otherwise provided to 
     BELL ATLANTIC by SUPPLIER  pursuant to this AGREEMENT.  Except as 
     permitted in this AGREEMENT or in an ORDER, SUPPLIER shall not create 
     or permit the creation of any lien, encumbrance, or security interest 
     in any PRODUCT licensed to BELL ATLANTIC, or sold to BELL ATLANTIC 
     and for which title has not yet passed to BELL ATLANTIC, without the 
     prior written consent of BELL ATLANTIC.  Title to any PRODUCT 
     licensed by BELL ATLANTIC hereunder shall remain with SUPPLIER or its 
     third party licensors through the applicable license term, unless 
     otherwise specified in this AGREEMENT or related ORDER(s). 


   * Confidential portion has been omitted and filed separately with the 
     Secretary of the Commission.


<PAGE>

                                                                 Page 24 of 38

     13.2    PRODUCT
     
     SUPPLIER warrants to BELL ATLANTIC that PRODUCT will be free from 
     material defects in product and workmanship, will materially 
     conform to and perform materially in accordance with the 
     SPECIFICATIONS, as set forth in this AGREEMENT, except as 
     modified by an ORDER. All warranties shall survive inspection,
     acceptance and payment. 
                                       
     13.3    SOFTWARE         

     SUPPLIER warrants to BELL ATLANTIC that the SOFTWARE media 
     delivered hereunder will be free from material defects and that the 
     SOFTWARE licensed under this AGREEMENT shall properly function in the
     specific applicable SYSTEM environment, and shall conform, function and
     perform materially in accordance with the DOCUMENTATION provided with 
     the SOFTWARE and SUPPLIER's published specifications for that specific 
     SOFTWARE release licensed hereunder, in all material respects, 
     including, but not limited to, operating performance, memory 
     requirements, response and run times and timing characteristics, 
     compatibility and modularity. In the event the SOFTWARE fails to 
     perform as described above during the Warranty Period, SUPPLIER shall 
     promptly correct or replace the SOFTWARE, without charge to BELL 
     ATLANTIC. Where the defect is service affecting the Warranty Period 
     shall be temporarily suspended during the period needed to correct 
     the defect and upon correction shall restart for the remaining 
     Warranty Period or *whichever is greater. 
                                       
     The warranty shall apply to the initial SOFTWARE delivery for each 
     SYSTEM. Subsequent to the applicable Warranty Period, each SYSTEM is 
     eligible for participation in the Software Upgrade Program, and BELL 
     ATLANTIC may request SUPPLIER continue maintenance in accordance with 
     Appendix J entitled SOFTWARE UPGRADE PROGRAM. 
                                       
     SUPPLIER further warrants to BELL ATLANTIC that, for a period of 
     *following the Acceptance Date for  any SYSTEM:  (i) No release by 
     SUPPLIER of any operating SOFTWARE for such SYSTEM shall eliminate, 
     reduce, or degrade the performance capabilities of such SYSTEM from 
     the corresponding level of performance at the Acceptance Date for 
     such SYSTEM; and (ii) any applications SOFTWARE licensed at such time 
     will function on such SYSTEM, unless specifically noted in the 
     appropriate ORDER; (iii) SUPPLIER shall maintain the previous two (2) 
     dot release levels of any SOFTWARE, or all levels released over the 
     previous *, whichever is longer.
                                       
     13.4    WARRANTY PERIOD
       
          13.4.A   COMMENCEMENT
        
          The term "Warranty Period" as used in this AGREEMENT and any 
          supplemental terms and conditions, means the period of time 
          listed below unless the parties have agreed in writing to a 
          different warranty period.  The warranty period for commences 
          on: 

          1. if installed by SUPPLIER, on the date PRODUCT and/or SOFTWARE 
             is accepted by BELL ATLANTIC;

          2. if not installed by SUPPLIER and the PRODUCT and/or SOFTWARE is
             offered by SUPPLIER on an Engineer (E), Furnish (F), and 
             Install (I), an E and F, or an F basis, on the earlier of (i)
             the Acceptance  Date and (ii) the last day of the Acceptance
             Period, unless otherwise agreed in writing; and 

          3. for other PRODUCT, but only if specifically noted, on the date 
             of receipt of the PRODUCT at the location specified by BELL
             ATLANTIC.
                                    
          13.4.B.  PRODUCT
                                      
          The warranty period for PRODUCT is as follows:

                               WARRANTY PERIOD
          PRODUCT TYPE            NEW PRODUCT     REPAIR/REPLACEMENT PRODUCT
          ------------            -----------     --------------------------
          T3AS PRODUCT                 *                     *
          TEST EQUIPMENT               *                     *
          APPARATUS                    *                     *
          PARTS                        *                     *
          PICS ITEMS DESIGNATED        *                     *
          IN APPENDIX A 

          The *warranty shall apply to the *units of *ordered under P.O.
          N3165089 and the quantity of *units of *ordered under PO 
          N3109161.




          *  Confidential portion has been omitted and filed separately with 
             the Secretary of the Commission.

<PAGE>

                                                                 Page 25 of 38

          13.4.C  SOFTWARE
 
          The warranty period for SOFTWARE is as follows:

                               WARRANTY PERIOD
          PRODUCT TYPE            NEW PRODUCT     REPAIR/REPLACEMENT PRODUCT
          ------------            -----------     --------------------------
                                       *                     *.

          13.4.D. THIRD PARTY PRODUCTS AND SOFTWARE
 
          Third party PRODUCTs (other than SYSTEM (including extensions 
          or additions)), and limited to PRODUCTs purchased by SUPPLIER 
          at the specific written request of BELL ATLANTIC which are not 
          normally furnished by SUPPLIER as part of the specified 
          PRODUCT), will have the remainder of the manufacturer's 
          warranty.  If the manufacturer's warranty cannot be passed 
          through to BELL ATLANTIC, SUPPLIER will be responsible for 
          providing the same warranty protection as the manufacturer's 
          warranty. With respect to third party SOFTWARE, SUPPLIER will 
          assign to BELL ATLANTIC all warranties allowed by the 
          manufacturer.

          13.4.E. CONSUMABLE COMPONENTS
 
          The warranties set forth in this clause shall not apply to 
          components of the PRODUCT which are normally consumed in 
          operation or which have a normal life inherently shorter than 
          the applicable warranty period such as light bulbs and fuses.

          13.4.F. IDENTICAL SYSTEM(s), PRODUCT, OR SOFTWARE
     
          Once acceptance occurs, for record keeping purposes, the Warranty 
          Period on all subsequently furnished identical SYSTEM(s), PRODUCT,  
          SOFTWARE or SERVICES shall begin upon shipment of the SYSTEM(s), 
          PRODUCT, SOFTWARE or completion of the SERVICES, as applicable, and 
          shall continue thereafter for the period of time specified in this 
          Section 13.4; provided, however, the parties agree that the 
          initiation of and coverage by the warranty is entirely independent of 
          acceptance, including BELL ATLANTIC's rights and remedies in 
          acceptance, and is not intended to nor shall it be construed as in 
          any way precluding, limiting or otherwise affecting BELL ATLANTIC's 
          acceptance rights which shall be and remain as set forth in the 
          Section 12.13 entitled ACCEPTANCE.

          13.4.G. EXTENSION FOR NON-CONFORMING PRODUCT OR SOFTWARE
     
          In all instances where the repair or replacement of SYSTEM(s), 
          PRODUCT and/or SOFTWARE is not completed within twenty-one (21) days 
          of SUPPLIER's receipt of non-compliant PRODUCT or receipt of 
          notification of non-compliant SOFTWARE, the warranty period shall be 
          extended for a period equivalent to the time required by SUPPLIER to 
          complete the repair or replacement.

     13.5    YEAR 2000
     
          13.5.A. YEAR 2000 TESTING

          SUPPLIER commits to complete its internal Year 2000 testing by the 
          end of the *.  SUPPLIER will submit its internal test plans and test 
          results to a third party for independent verification.  This includes 
          a compliance audit of SUPPLIER's test criteria, test plans, test 
          cases, and test results against GR-2945-CORE Year 2000 regression 
          set.  SUPPLIER agrees that Year 2000 system testing will be performed 
          at BELL ATLANTIC.  SUPPLIER shall solicit customer input and 
          participation in the creation of the BELL ATLANTIC Y2K system test 
          plan and subsequent testing. SUPPLIER shall rpovide the first office 
          application of the Year 2000 version of the SOFTWARE to BELL ATLANTIC 
          by no later than *.

          13.5.B. SOFTWARE
     
          SUPPLIER represents and warrants that, upon completion of its 
          internal Year 2000 testing of the applicable SOFTWARE,  such SOFTWARE 
          delivered hereunder shall record, store, process, and present 
          calendar dates falling on or after January 1, 2000, in the same 
          manner, and with the same functionality, as such SOFTWARE record, 
          store, process and present calendar dates falling on or before 
          December 31, 1999.  SUPPLIER further represents and warrants that in 
          all other respects such SOFTWARE shall not in any way lose 
          functionality or degrade in performance as a consequence of such 
          SOFTWARE operating at a date later than December 31, 1999.  Without 
          limitation of the foregoing, SUPPLIER's representatives will consult 
          with BELL ATLANTIC's or its AFFILIATE's designated representative for 
          century date change requirements, to ensure that such SOFTWARE will 
          lose no functionality with respect to the introduction of records 
          containing dates falling on or after January 1, 2000, and to use 
          commercially reasonable efforts to ensure that such SOFTWARE will be 
          interoperable with other software used by BELL ATLANTIC or its 
          AFFILIATE which may deliver records to such SOFTWARE, receive records 
          from such SOFTWARE, or interact with such SOFTWARE in the course of 
          processing data. 




          *  Confidential portion has been omitted and filed separately with 
             the Secretary of the Commission.
<PAGE>

                                                                 Page 26 of 38
               
          13.5.C  SYSTEMS

          SUPPLIER represents and warrants that, upon completion of its 
          internal Year 2000 testing of the applicable SYSTEM,  such  SYSTEMS 
          delivered hereunder will record, store, process, and present calendar 
          dates falling on or after January 1, 2000, and with the same 
          functionality, as such SYSTEMS record, store, process and present 
          calendar dates falling on or before December 31, 1999.  SUPPLIER 
          further represents and warrants that in all other respects such 
          SYSTEMS shall not in any way lose functionality or degrade in 
          performance as a consequence of such SYSTEMS operating at a date 
          later than December 31, 1999.  Without limitation of the foregoing, 
          SUPPLIER's representatives will consult with BELL ATLANTIC's or its 
          AFFILIATE's designated representative for century date change 
          requirements, to ensure that such SYSTEMS will lose no functionality 
          nor will they degrade in performance with respect to the introduction 
          of records containing dates falling on or after January 1, 2000, and 
          to use commercially reasonable efforts to ensure that such SYSTEMS 
          will be interoperable with other SYSTEMS used by BELL ATLANTIC which 
          may deliver records to such SYSTEMS, receive records from such 
          SYSTEMS, or interact with such SYSTEMS, in the course of processing 
          data.

     Notwithstanding the foregoing, SUPPLIER shall have no responsibility for
     any loss of functionality or degradation or failure to record, store,
     process or present calendar dates falling on or after January 1, 2000
     caused by the failure to so perform of any SOFTWARE or SYSTEMs, other than
     SUPPLIER's, used by BELL ATLANTIC or any of its Affiliates or any other
     supplier.

     13.6    ILLICIT CODE  
     
     SUPPLIER warrants to the best of the  knowledge of its management as of 
     the Effective Date of this Agreement,  unless (a) authorized in writing 
     by BELL ATLANTIC or (b) necessary to perform valid duties under this 
     AGREEMENT, any SOFTWARE provided to BELL ATLANTIC by SUPPLIER hereunder 
     shall:  

     (a)  contain no hidden files; 
     
     (b)  not replicate, transmit, or activate itself without control of a 
          person operating computing equipment on which it resides; (

     (c)  not alter, damage, or erase any data or computer programs without
          control of a person operating the computing equipment on which it
          resides, except, and to the extent, required by BELL ATLANTIC . 
     
     Notwithstanding anything elsewhere in this AGREEMENT to the contrary, in 
     the event of SUPPLIER's breach of this Section 13.6, SUPPLIER shall be 
     in default of this AGREEMENT, and no cure period shall apply.  In 
     addition to any other remedies available to it under this AGREEMENT, 
     BELL ATLANTIC reserves the right to pursue any civil and/or criminal 
     penalties available to it against the SUPPLIER.

     13.7    SERVICES  
     
     SUPPLIER warrants to BELL ATLANTIC and BELL ATLANTIC's  AFFILIATES that 
     SERVICES provided hereunder shall be performed in a professional and 
     workman-like manner, and in accordance with applicable SPECIFICATIONS.  
     All warranties shall survive inspection, acceptance and payment.

     13.8    EMPLOYEES AND SUBCONTRACTORS BOUND  
     
     SUPPLIER represents that it has and will maintain appropriate 
     agreement(s) with its employees, or (without altering the restrictions 
     against subcontracting set forth elsewhere in this AGREEMENT) others 
     whose services SUPPLIER may require, sufficient to enable it to comply 
     with all provisions of this AGREEMENT, including, without limitation, 
     the provisions relating to intellectual property. Upon request by BELL 
     ATLANTIC and if permitted by the terms of any such agreement, SUPPLIER 
     shall make such agreements available for inspection by BELL ATLANTIC. 

     13.9    LIMITATIONS ON WARRANTIES
     
     SUPPLIER'S PERFORMANCE UNDER WARRANTY AS SET FORTH IN THIS ARTICLE 13 
     SHALL NOT REQUIRE SUPPLIER TO REPAIR OR REPLACE ANY DEFECTIVE  SYSTEM, 
     PRODUCT, SOFTWARE, LICENSED MATERIALS OR DOCUMENTATION WHERE IT CAN BE 
     SHOWN THAT (I) THE DEFECT WAS CAUSED DIRECTLY BY THE MODIFICATION OR 
     ALTERATION OF THE SYSTEM, PRODUCT, SOFTWARE, LICENSED MATERIALS OR 
     DOCUMENTATION BY ANYONE OTHER THAN SUPPLIER, (II) THE DEFECT WAS CAUSED 
     DIRECTLY BY A FAILURE TO MAINTAIN THE SYSTEM, PRODUCT, SOFTWARE, 
     LICENSED MATERIALS OR DOCUMENTATION IN ACCORDANCE WITH SUPPLIER'S 
     MAINTENANCE RECOMMENDATIONS, (III) THE DEFECT WAS CAUSED DIRECTLY BY A 
     FAILURE TO INSTALL THE SYSTEM, PRODUCT, SOFTWARE, LICENSED MATERIALS OR 
     DOCUMENTATION IN ACCORDANCE WITH  SUPPLIER'S INSTALLATION PROCEDURES, 
     (IV) THE DEFECT WAS CAUSED  DIRECTLY BY  OPERATING THE SYSTEM, PRODUCT, 
     SOFTWARE, LICENSED MATERIALS OR DOCUMENTATION IN A MANNER OTHER THAN 
     THAT SPECIFIED BY SUPPLIER, (VI) THE DEFECT WAS CAUSED DIRECTLY BY 

<PAGE>

                                                                 Page 27 of 38

     THE ABUSE, NEGLIGENCE OR OTHER IMPROPER TREATMENT (INCLUDING, WITHOUT 
     LIMITATION, USE OUTSIDE THE RECOMMENDED ENVIRONMENT) TO WHICH THE 
     SYSTEM, PRODUCT, SOFTWARE, LICENSED MATERIALS OR DOCUMENTATION HAS BEEN 
     SUBJECTED OR V)THE SYSTEM, PRODUCT, SOFTWARE, LICENSED MATERIALS OR 
     DOCUMENTATION HAS HAD ITS SERIAL NUMBER REMOVED OR ALTERED. BELL 
     ATLANTIC'S SOLE REMEDY UNDER THIS PROVISION FOR A BREACH OF WARRANTY IS 
     AS STATED IN SECTION 12.9 (REPAIRS AND REPLACEMENT) ABOVE.  EXCEPT AS 
     SET FORTH IN THIS AGREEMENT AND ANY ATTACHMENTS THERETO, SUPPLIER MAKES 
     NO OTHER WARRANTIES WITH RESPECT OT THE SYSTEM, PRODUCTS, MATERIALS, 
     SOFTWARE, LICENSED MATERIALS, OR DOCUMENTATION, OR ANY SERVICES AND 
     DISCLAMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES 
     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
     NON-INFRINGEMENT.  FURTHER, EXCEPT AS SET FORTH IN THIS AGREEMENT AND 
     ANY ATTACHMENTS THERETO, SUPPLIER DOES NOT WARRANT, GUARANTEE OR MAKE 
     ANY REPRESENTATIONS REGARDING THE USE, OR THE RESULTS OF THE USE, OF THE 
     PRODUCTS, SYSTEM SOFTWARE, LICENSED MATERIALS OR DOCUMENTATION IN TERMS 
     OF CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.

14.   COMPLIANCE WITH REGULATIONS

     14.1    COMPLIANCE WITH LAWS 
     
     SUPPLIER and all persons furnished by SUPPLIER shall comply in all 
     material respects with the applicable EEO, Fair Labor Standards Act 
     and all other applicable federal, state, county and local laws, 
     ordinances, regulations and codes (including procurement of required 
     permits or certificates) in its or their performance under this 
     AGREEMENT or an ORDER issued pursuant hereto.

     This AGREEMENT is subject to applicable laws and executive orders 
     relating to equal opportunity and nondiscrimination in employment.  
     SUPPLIER and all persons furnished by SUPPLIER shall not unlawfully 
     discriminate in its employment practices against any person by reason 
     of race, religion, color, sex, disability or national origin and 
     agrees to comply with the provisions of said laws and orders to the 
     extent applicable in the performance of this AGREEMENT and as set 
     forth in the attached Non-Discrimination Compliance Undertaking.

     SUPPLIER agrees to indemnify and hold harmless BELL ATLANTIC for, 
     from and against and defend BELL ATLANTIC against, any loss or damage 
     sustained because of SUPPLIER's non-compliance of this Section 14.1.

     14.2    RADIO FREQUENCY ENERGY STANDARDS  
     
     PRODUCT furnished hereunder shall, at time of shipment, comply to the 
     extent applicable with the requirements of Subpart J of Part 15 of 
     the Federal Communications Commission's Rules and Regulations, as 
     they may be amended from time to time, including those Sections 
     concerning the labeling of such PRODUCT and the suppression of radio 
     frequency and electro-magnetic radiation to the specified levels.  
     Should the PRODUCT during use fail to meet relevant parts of the FCC 
     Rules and Regulations for spurious emission and interference to radio 
     communications, SUPPLIER shall provide to BELL ATLANTIC information 
     relating to methods of suppressing such interference.  In the event 
     such interference cannot reasonably be suppressed, then all remedies 
     as provided by Section 13 entitled WARRANTIES shall apply.

     14.3    REGISTRATION  
  
     When PRODUCT furnished under this AGREEMENT is subject to 
     registration under Part 68 of the Federal Communications Commission's 
     Rules and Regulations as they may be amended from time to time ("Part 
     68"), SUPPLIER warrants that such PRODUCT furnished under this 
     AGREEMENT is registered under and complies with Part 68 including, 
     but not limited to, all labeling and customer instruction 
     requirements unless such PRODUCT is furnished as part of a technical 
     field trial or unless the PRODUCT is provided for SERVICES not 
     covered or exempt under Part 68.  SUPPLIER agrees to defend and hold 
     BELL ATLANTIC harmless from any liability, claim or demand (including 
     the costs, expenses and reasonable attorney's fees on account 
     thereof) that may arise solely out of SUPPLIER's non-compliance with 
     Part 68. BELL ATLANTIC agrees to promptly notify SUPPLIER of any 
     liability, claim or demand against BELL ATLANTIC for which SUPPLIER 
     is responsible under this clause and gives SUPPLIER full opportunity 
     and authority to assume the defense, including appeals, and to settle 
     such liability, claims and demands.

     14.4.   GOVERNMENT CONTRACT PROVISIONS  
  
     ORDERs placed pursuant to this AGREEMENT containing a notation that 
     the PRODUCT is intended for use under government contracts shall, 
     upon acceptance by SUPPLIER, be subject to the then current 
     government provisions referenced thereon or in attachments thereto.

<PAGE>

                                                                 Page 28 of 38

     14.5.  ENVIRONMENTAL COMPLIANCE
     
     A.   SUPPLIER hereby warrants, represents and certifies that SUPPLIER's 
          performance of this AGREEMENT, SUPPLIER's PRODUCTS and the result 
          of SUPPLIER's SERVICES rendered hereunder conform to and shall 
          conform and comply in all material respects with all applicable 
          Federal, State, County and Municipal laws, statutes, regulations, 
          and codes which relate to environmental protection and employee 
          protection including, but not limited to, the Atomic Energy Act, 
          Clean Air Act, Clean Water Act, Comprehensive Environmental 
          Response, Compensation and Liability Act, Federal Insecticide, 
          Fungicide and Rodenticide Act, Hazardous Materials Transportation 
          Act, Marine Protection, Research and Sanctuaries Act, National 
          Environmental Policy Act, Noise Control Act, Occupational Safety 
          and Health Act, Safe Drinking Water Act, Solid Waste Disposal Act, 
          Toxic Substances Control Act, and any equivalent or similar state, 
          county, or local law, regulation, statute, code, or ordinance.

     B.   "State" refers to the State of New York, the state where, or in which,
          SUPPLIER'S performance occurs and any other state or subdivision of a
          state asserting jurisdiction over SUPPLIER'S performance hereunder.

     C.   "Performance" as used herein refers to SUPPLIER'S installation,
          dismantling, segregation, staging, loading, removal, processing,
          transportation, disposal, treatment, reclamation or other handling
          methods used in performing under this AGREEMENT.

     D.   SUPPLIER further agrees to recertify compliance herewith at BELL
          ATLANTIC's request.  SUPPLIER will indemnify and save BELL ATLANTIC
          and its CUSTOMER harmless from any material violation or breach of
          this Section 14.5 entitled ENVIRONMENTAL COMPLIANCE.

     E.   SUPPLIER certifies that it shall obtain all licenses, permits, and
          authorizations necessary to perform this AGREEMENT from the
          appropriate State, Federal and Local governments and agencies prior to
          commencement (performance) of WORK hereunder.

     F.   SUPPLIER shall use commercially reasonable efforts to exercise every
          reasonable safety precaution and best management practice, whether or
          not required by law, in dealing with the PRODUCT.

     G.   SUPPLIER shall notify BELL ATLANTIC immediately if any permit,
          license, certificate or identification number required for working on
          the PRODUCT shall have been revoked, not been renewed, expired or been
          suspended.

     14.6.   HAZARDOUS CHEMICAL INFORMATION.
     
     SUPPLIER shall provide Material Safety Data Sheet(s) in the event that 
     the PRODUCT, equipment, or PRODUCT (including electronic components) to 
     be provided is or contains any substance designated:

     A.   as a toxic/hazardous substance, as defined by the Occupational Safety
          and Health Administration, Environmental Protection Agency, and/or all
          state "Right to Know" laws; and/or
     B.   as a carcinogen or potential carcinogen by the National Toxicology
          Program or the International Agency for Research on Cancer; and/or
     C.   a hazardous PRODUCT as defined in the Hazardous Material
          Transportation Act; and/or
     D.   a regulated PRODUCT under the Federal Insecticide, Fungicide and
          Rodenticide Act; and/or
     E.   as a hazardous waste in the Resource Conservation and Recovery Act or
          the Superfund Amendment Reauthorization Act; and/or
     F.   as radioactive; and/or
     G.   under the Clean Air Act or Clean Water Act.

     A Material Safety Data Sheet must also be provided if the equipment or
     PRODUCT (including components) could be a hazard to human health and/or the
     environment in a fire/combustion or spill situation.

     14.7.   OCCUPATIONAL SAFETY AND HEALTH ACT (O.S.H.A.)  
     
     SUPPLIER in performing work under this AGREEMENT will  comply in all 
     material respects with the applicable provisions of the Federal 
     Occupational Safety and Health Act of 1970 and with any and all 
     applicable rules and regulations issued pursuant to the Act.

     14.8.   EXPORT
     
     A.   BELL ATLANTIC shall comply with all export laws, restrictions, 
          national security controls and regulations of the United States and 
          all other applicable foreign agencies and authorities, and shall 
          not export or re-export or allow the export or re-export, of the 
          PRODUCTS, LICENSED MATERIALS, DOCUMENTATION, SUPPLIER CONFIDENTIAL 
          INFORMATION or other technical data or any copy, portion or direct 
          product thereof (i) in violation of any such restrictions, laws or 
          regulations, or (ii) without all required authorization to Cuba, 
          Libya, 

<PAGE>

                                                                 Page 29 of 38

          North Korea, Iran, Iraq or Rwanda or to any Group D:1 or E:2 
          country (or any national of such country) specified in the then 
          current Supplement No 1 to part 740 of the U.S. Export 
          Administration Regulations (or any successor supplement or 
          regulations).  BELL ATLANTIC shall, at its own expense, obtain all 
          necessary customs, import, or other governmental authorizations and 
          approvals.  This paragraph shall survive termination of this 
          AGREEMENT.

     B.   SUPPLIER covenants and agrees with BELL  ATLANTIC that in performing
          under this AGREEMENT SUPPLIER will, at all times, comply in all
          material respects with all applicable provisions of the Export
          Administration Amendments Act of 1985 (P.L. 99-64); the Department of
          Defense Authorizations Act of 1984 (P.L. 98-94); the Arms Export
          Control Act (22 USC 1234 Sections 2751 et seq.); the Department of
          State International Traffic in Arms Regulations (22 CFR Sections 121
          et seq.); the Department of Commerce Technical Data Regulations (15
          CFR Pt. 179) and all Regulations promulgated under any of the
          foregoing Acts.

15.   WORKAROUND

     15.1.   SCHEDULING
     
     In the event SUPPLIER fails to furnish any SYSTEM, PRODUCT, SOFTWARE or 
     SERVICES, or any combination thereof, that conform to approved 
     SPECIFICATIONS by the agreed upon original delivery date, or an amended 
     delivery or completion date, for reasons other than FORCE MAJEURE, or 
     delays caused directly by BELL ATLANTIC's failure to meet their 
     obligations to SUPPLIER, and BELL ATLANTIC determines that SUPPLIER's 
     failure to meet its obligations will cause BELL ATLANTIC to incur 
     additional costs to meet commitments to their customers, then BELL 
     ATLANTIC may notify SUPPLIER in writing ,  in accordance with Section 
     19.7 hereof, that a WORKAROUND condition exists. SUPPLIER and BELL 
     ATLANTIC shall promptly participate in the joint preparation of a 
     WORKAROUND plan to resolve the problem.

16.    DOCUMENTATION AND RECORD KEEPING

     16.1.   DOCUMENTATION  
     
     SUPPLIER agrees to furnish DOCUMENTATION, as set forth or otherwise 
     identified in Appendix B and the terms and conditions stated within this 
     AGREEMENT, for the SYSTEM hereunder, and any succeeding changes thereto, 
     at no additional charge. The cost of DOCUMENTATION shall be included at 
     no additional cost to BELL ATLANTIC.

     For each ORDER placed under this AGREEMENT, SUPPLIER shall furnish to BELL
     ATLANTIC appropriate DOCUMENTATION including, but not limited to, items of
     installation, engineering, planning, acceptance testing, operation and
     maintenance of PRODUCT and SOFTWARE.

     SUPPLIER shall be responsible for updating the DOCUMENTATION for any
     subsequent updates and changes to DOCUMENTATION.  SUPPLIER shall maintain a
     list of persons and organizations of BELL ATLANTIC, to whom the updates
     shall be provided.  The updates and any subsequent changes shall contain a
     SUPPLIER identification reference number and date of issue to facilitate
     administration.  Such subsequent changes and updates shall be provided
     within a reasonable time, at no charge to BELL ATLANTIC.

     SUPPLIER grants BELL ATLANTIC the right to make copies of any documents
     furnished under this AGREEMENT for the exclusive internal use of BELL
     ATLANTIC in accordance with the terms of this AGREEMENT.  If any document
     that is to be  copied bears a copyright or proprietary notice, BELL
     ATLANTIC and its AFFILIATE shall reproduce the copyright or proprietary
     notice on all copies.  

     16.2.   PERIODIC REPORTS
     
     SUPPLIER agrees to render at no charge to BELL ATLANTIC on a quarterly 
     basis, unless otherwise mutually agreed upon, and in formats acceptable 
     to BELL ATLANTIC, the following reports (by way of example and not 
     limitation):

          a.   Material Back Order Report
          b.   Activity Report for the prior fiscal quarter
          c.   M/WBE Reports as required by Appendix _.

     SUPPLIER agrees to render other reasonable periodic reports for service
     affecting conditions or other conditions that affect the operational and
     administrative procedures of BELL ATLANTIC, or as otherwise reasonably
     requested by BELL ATLANTIC.

     16.3.   RECORDS AND AUDIT
     
     BELL ATLANTIC and SUPPLIER shall mutually agree upon an independent 
     auditor who, at BELL ATLANTIC's option but no more than once per 
     calendar year, may audit SUPPLIER'S records of (i) SUPPLIER'S 
     transactions with 

<PAGE>

                                                                 Page 30 of 38

     its other commercial customers for the same SERVICES SUPPILER is 
     providing BELL ATLANTIC, provided such records are not subject to 
     restrictions on disclosure by SUPPLIER and (ii) SUPPLIER'S billing 
     records for the SERVICES furnished under this AGREEMENT, for 
     verification of comparable pricing in accordance with Section 19.9 
     hereof entitled MOST FAVORED CUSTOMER. BELL ATLANTIC shall be 
     responsible for all audit/verification expenses provided that SUPPLIER 
     shall reimburse BELL ATLANTIC for any actual and reasonable 
     out-of-pocket expenses if a material non-compliance with the provisions 
     in Section 19.9 is determined by the auditor".

     The independent auditor shall not disclose the identity of any of
     SUPPLIER's  other commercial customers any such audit may be conducted only
     during normal business hours during the term of this AGREEMENT and during
     the respective periods in which SUPPLIER is required to maintain such
     records.  The accuracy of SUPPLIER'S billing shall be determined from the
     results of such audits.   Notwithstanding the foregoing, BELL ATLANTIC
     shall provide not less than thirty (30) days notice prior to a requested
     Audit, and both parties shall mutually determine the date of the Audit.  

17.   PROFESSIONAL SERVICES

     17.1.   TRAINING SERVICES
     
     If requested by BELL ATLANTIC, SUPPLIER agrees to provide training in 
     the courses referenced in Appendix D, entitled TRAINING, training in any 
     courses subsequently developed by SUPPLIER, and any training equipment 
     and instructional DOCUMENTATION required in support of PRODUCT, 
     SOFTWARE, and/or SERVICES to be furnished by SUPPLIER under this 
     AGREEMENT.

     The training, training equipment and instructional DOCUMENTATION to be
     furnished by SUPPLIER under this AGREEMENT shall be in the area of SYSTEMS
     planning, application engineering, practices, operation, installation,
     maintenance and repair, as well as marketing of SYSTEM features as
     required.

     Such training, training equipment and instructional DOCUMENTATION shall be
     configured to provide at BELL ATLANTIC's option, either/or both of the
     following:
     
     A.   Instructors, training equipment and instructional DOCUMENTATION 
          suitable to train BELL ATLANTIC's and/or its AFFILIATE's personnel 
          at either SUPPLIER's or BELL ATLANTIC's and/or its  AFFILIATE's 
          location.

     B.   Instructor training, training equipment and instructional
          DOCUMENTATION suitable to train BELL ATLANTIC's and/or its AFFILIATE's
          training staff, so that they, in turn, may conduct training programs
          related to the SYSTEM and qualify other BELL ATLANTIC personnel in the
          appropriate use, or application of the SYSTEM.

     The training, training equipment and instructional DOCUMENTATION furnished
     by SUPPLIER under this AGREEMENT, shall be developed and furnished in
     accordance with the requirements, formats and procedures set forth in
     Appendix D entitled TRAINING.

     17.2.   TRAINING CREDITS
     
          SUPPLIER agrees to provide BELL ATLANTIC with *tuition credits for 
          each *dollars *in Orders under this Agreement which are redeemable 
          as follows:

          * required per person for a *course at SUPPLIER's training facility in
            San Diego.

     or
          
          * credits required per person for a suitcase course offered in 
            BELL ATLANTIC's region (at BELL ATLANTIC's  training facility or a 
            central office with the necessary equipment).

     or
          
          * credits required per person for the 'Train the Trainer' course.

     *.

     All tuition credits expire *after the end of the calendar year in which
     they were earned. Each party shall pay its own travel expenses to and from
     the tuition credit courses.

     17.3.   CONSULTING SERVICES
     
     BELL ATLANTIC shall have the option to contract for specialized 
     consulting assistance from SUPPLIER on a project basis to be described 
     in documents specifying the consulting SERVICES and deliverables to be 
     provided by SUPPLIER ("Statement(s) of Work").  Statements of Work will 
     be executed from time to time, and upon acceptance by




     *  Confidential portion has been omitted and filed separately with 
        the Secretary of the Commission.
<PAGE>

                                                                 Page 31 of 38

     both parties will be incorporated into this AGREEMENT by reference thus 
     describing the specifications for each engagement ("Engagement").  If 
     there are any terms or conditions specified in a Statement of Work that 
     conflict with this AGREEMENT, the terms and conditions of this AGREEMENT 
     will prevail unless those terms are expressly noted as overriding the 
     terms and conditions of the AGREEMENT and then only for that specific 
     Statement of Work.  

18.   SUPPORT

     18.1.   CONTINUING AVAILABILITY
     
     SUPPLIER agrees to offer for sale maintenance, support, replacement and 
     repair parts for PRODUCT ordered pursuant to this AGREEMENT for 
     *commencing from SUPPLIER's last shipment of such PRODUCT to BELL 
     ATLANTIC.  In addition to SUPPLIER's obligation to offer PRODUCT support 
     for *from SUPPLIER's last shipment of PRODUCT, SUPPLIER agrees to offer 
     for sale  SOFTWARE support for maintenance, replacement or updates for 
     *from SUPPLIER's last shipment of SOFTWARE listed in Appendix A hereof, 
     as applicable. 

     SUPPLIER shall also give BELL ATLANTIC one (1) year prior written notice of
     the discontinuance of the sale of maintenance, replacement and repair parts
     for PRODUCT.  Charges for support SERVICES provided pursuant to this
     paragraph shall be mutually agreed upon at time of discontinuance notice.  
     When SUPPLIER has given BELL ATLANTIC such discontinuance notice, or if for
     any other reason SUPPLIER is unable to provide such PRODUCT, or SOFTWARE,
     SUPPLIER shall, if requested by BELL ATLANTIC, endeavor to arrange for a
     third party to continue to furnish the discontinued maintenance,
     replacement and repair parts to BELL ATLANTIC.  In the event SUPPLIER is
     not requested or, if requested, is unable to find a third party to furnish
     such parts to BELL ATLANTIC, SUPPLIER shall, upon request by BELL ATLANTIC,
     to the extent SUPPLIER has such rights, grant  BELL ATLANTIC an exclusive
     nontransferable  license upon mutually agreeable terms and license fees to
     use  existing technical information and rights, including SOURCE CODE and
     DOCUMENTATION,  for BELL ATLANTIC to manufacture, or have manufactured, the
     discontinued parts.  In no event shall the provision of such rights and
     technical information to a third party or to BELL ATLANTIC be delayed
     beyond six (6) months after SUPPLIER's date of notice of discontinuance.

     SUPPLIER shall protect against the loss or damage of the existing technical
     information required for the manufacture of the discontinued parts with the
     same degree of care that SUPPLIER uses to protect its own valuable
     technical information.  In addition, SUPPLIER shall advise BELL ATLANTIC in
     writing at least six (6) months in advance of its decision to discontinue
     maintenance of any technical information, so that BELL ATLANTIC may acquire
     such technical information in accordance with the provisions of this
     clause.

     The technical information includes, by example and not by way of
     limitation:  (a) manufacturing drawings and specifications of raw materials
     and components comprising such parts; (b) manufacturing drawings and
     specifications covering special tooling and the operation thereof; and (c)
     a detailed list of all commercially available parts and components
     purchased by the SUPPLIER on the open market disclosing the part number,
     name, and location of the SUPPLIER and price lists for the purchase
     thereof, including SOURCE CODE and DOCUMENTATION.

     18.2. EXTRAORDINARY SUPPORT
     
     In addition to the provisions for repair or replacement of PRODUCT 
     and/or SOFTWARE set forth in Articles 13, entitled WARRANTIES, and 12.9, 
     entitled REPAIRS AND REPLACEMENTS, SUPPLIER agrees, in any event, if any 
     natural or other disaster or emergency causes an out of service 
     condition, SUPPLIER shall use extraordinary effort to locate or provide 
     (i.e. procure or manufacture) and ship to BELL ATLANTIC replacement 
     PRODUCT or SOFTWARE, and make available necessary manpower within twenty 
     four (24) hours of verbal notification by BELL ATLANTIC.

     Such emergency support shall be available twenty four (24) hours a day,
     seven (7) days a week during the term of this AGREEMENT and for a period of
     * after the expiration of this AGREEMENT.

     Charges for replacement PRODUCT, SOFTWARE, AND SERVICES shall be at the
     then current prices contained in Appendix A hereof, entitled PRICES,
     SCHEDULES, DISCOUNTS, for the term of this AGREEMENT, and thereafter at
     SUPPLIER's then current published prices, plus a reasonable charge for the
     extraordinary support effort provided, for the term of this AGREEMENT. 
     This clause shall not be construed to require SUPPLIER to maintain any
     inventories whatsoever nor maintain any position of readiness to perform in
     the future nor require breach of SUPPLIER's contractual obligations to
     third parties.

     18.3.   REGULATORY ASSISTANCE  
     
     If requested by BELL ATLANTIC, SUPPLIER shall, to the best of its 
     ability, provide reasonable assistance by supplying an expert witness, 
     if required, with regard to regulatory matters in connection with 
     SYSTEMS, PRODUCT, SOFTWARE and/or SERVICES provided hereunder, provided 
     that BELL ATLANTIC shall pay SUPPLIER for such 

   * Confidential portion has been omitted and filed separately with the 
     Secretary of the Commission.

<PAGE>

                                                                 Page 32 of 38

     assistance at a reasonable rate to be specified and shall reimburse 
     SUPPLIER for all travel and per-diem living expenses reasonably incurred 
     by the expert witness.

19.   GENERAL PROVISIONS

     19.1.   SEVERABILITY  
     
     If any of the provisions of this AGREEMENT shall be invalid or 
     unenforceable, such invalidity or unenforceability shall not invalidate 
     or render unenforceable the entire AGREEMENT, but rather the entire 
     AGREEMENT shall be construed as if not containing the particular invalid 
     or unenforceable provision or provisions. If the invalid or 
     unenforceable provision or provisions shall be considered an essential 
     element of this AGREEMENT, the parties shall promptly attempt to 
     negotiate a substitute therefor.

     19.2.   CHOICE OF LAW 
     
     The construction, interpretation and performance of this AGREEMENT shall 
     be governed by and construed in accordance with the domestic laws of the 
     State of New York.  

     19.3.   MINORITY AND WOMEN-OWNED BUSINESS ENTERPRISES
     
     SUPPLIER agrees to provide equal opportunity to Minority and Women-Owned 
     Business Enterprises (M/WBE) in accordance to requirements set forth in 
     Appendix K within three months of the execution of this AGREEMENT and on 
     a quarterly basis thereafter.

     SUPPLIER's compliance with this clause shall be subject, at BELL ATLANTIC's
     option to independent verification in accordance with the clause hereof
     entitled "Records and Audit."

     19.4.   TAXES  
     
     BELL ATLANTIC shall be liable for and shall reimburse SUPPLIER only for 
     the following tax payments, including related charges, except for any 
     related charges that may be imposed as a result of SUPPLIER's failure to 
     timely file an accurate tax return required to be filed by it, with 
     respect to transactions under this AGREEMENT:  Federal manufacturers and 
     retailers excise and New York state and local sales or use taxes, 
     including any privilege or excise taxes in the nature of sales or use 
     taxes, as applicable.  Such taxes shall be billed to BELL ATLANTIC as 
     separate items on SUPPLIER's invoices, unless a valid exemption 
     certificate is furnished by BELL ATLANTIC to SUPPLIER.  BELL ATLANTIC 
     shall have the right to have SUPPLIER cooperate with BELL ATLANTIC in 
     contesting with the imposing jurisdiction, at BELL ATLANTIC's expense, 
     any such taxes that BELL ATLANTIC deems are improperly levied.

     19.5.   SURVIVAL  
     
     All rights and obligations hereunder granted or incurred prior to and 
     which by their nature would continue beyond the cancellation, 
     termination, or expiration of this AGREEMENT or any ORDER placed 
     hereunder by BELL ATLANTIC shall survive such cancellation, termination, 
     or expiration, including without limitation Sections 7.3, 7.4, 7.5, 7.9, 
     9.4 and 19.

     19.6.   NON-WAIVER  
     
     No course of dealing or failure of either party to strictly enforce any 
     term, right or condition of this AGREEMENT shall be construed as a 
     waiver of such term, right or condition.

     19.7. NOTICES  
     
     Any Notice or demand which under the terms of this AGREEMENT or under 
     any statute must or may be given or made by SUPPLIER or BELL ATLANTIC, 
     shall be in writing and shall be given or made by facsimile or similar 
     communication shall be made by SUPPLIER or BELL ATLANTIC in writing 
     which may take the form of facsimile, electronic transfer, overnight 
     courier or certified or registered mail, with return receipt requested, 
     addressed to the respective parties as follows:.  A Notice shall be 
     deemed delivered upon record of transmission receipt or return receipt, 
     as applicable, or one (1) day after shipment via overnight courier or 
     three (3) days after mailing by certified or registered mail.

     Notices to BELL ATLANTIC shall be addressed to the following (unless this
     AGREEMENT provides otherwise):
     
          BELL ATLANTIC
          240 East 38th Street, 14th Floor
          New York, New York  10016
          Attn: Mr Thomas Trempy   
          Telecopier No.: 212-476-5181
     
<PAGE>

                                                                 Page 33 of 38

          with a copy to:

          BELL ATLANTIC 
          1095 Avenue of the Americas, 38th Floor
          New York, New York  10016
          Attn.:  Legal Department
          Telecopier No.: 212-840-1110
     
     Notices to SUPPLIER shall be addressed to:

          Applied Digital Access, Inc.
          9855 Scranton Rd.
          San Diego, CA  92121
          Attn:  T3AS Product Manager
          Telecopier No.: 619-623-2208
     
          with a copy to:
   
          Applied Digital Access, Inc.
          9855 Scranton Rd.
          San Diego, CA  92121 
          Attn:  Corporate Counsel
          Telecopier No.: 619-623-2208
     
     Such notice or demand shall be deemed to have been given or made when 
     sent in the case of facsimile or other similar communication, subject to 
     written confirmation of actual receipt, or when deposited postage 
     prepaid in the U.S. Mail.  Notices to SUPPLIER shall be addressed to:  

     19.8.   FORCE MAJEURE
     
     Neither party shall be held responsible for any delay or failure in 
     performance of this AGREEMENT caused by fires, strikes, labor disputes, 
     embargoes, requirements imposed by government regulations, civil or 
     military authorities, acts of God or by the public enemy, inability to 
     secure raw materials or transportation facilities, acts or omissions of 
     carriers  or other causes similarly beyond the control of SUPPLIER or 
     BELL ATLANTIC and which could not have been avoided through the 
     application of reasonable foresight or diligent effort.  If such 
     contingency occurs, the party delayed or unable to perform shall provide 
     notice to the other party and if the delaying causes continue for a 
     period of sixty (60) days, the party injured by the other's inability to 
     perform may elect to:

     (a)  terminate such order or part thereof as to PRODUCT and/or SOFTWARE 
          not already shipped or SERVICES not already performed;
     
     (b)  suspend such order for the duration of the delaying causes, buy or 
          sell elsewhere PRODUCT and/or SOFTWARE to be bought or sold hereunder 
          and deduct from any order commitment the quantity bought or sold or 
          for which such commitments have been made elsewhere; or

     (c)  resume performance under such order once the delaying cause ceases
          with an option in the injured party to extend the delivery or
          performance date up to the length of time the contingency endures.
     
     Unless written notice is given no later than fifteen (15) days from when 
     the injured party is notified, (b) shall be deemed selected.

     19.9  MOST FAVORED CUSTOMER 
     
     SUPPLIER represents that all of the prices, rates, charges or fees, 
     granted to BELL ATLANTIC by SUPPLIER hereunder will be as or more 
     favorable than the equivalent prices, warranties, benefits, terms and 
     conditions granted to SUPPLIER's other commercial customers under like 
     or similar circumstances.

     If at any time during the term of this AGREEMENT, SUPPLIER shall offer more
     favorable prices, rates, charges or fees, for substantially the same or
     similar PRODUCT, SERVICES, DOCUMENTATION, or LICENSED MATERIALS  as those
     provided to other commercial customers under like or similar circumstances,
     then: 

     A.   SUPPLIER shall, within thirty (30) calendar days after the effective
          date of such offering, notify BELL ATLANTIC(s) of such fact in
          accordance with Section 19.7 hereof, entitled Notices, and offer BELL
          ATLANTIC(s) the more favorable offering; and

     B.   this AGREEMENT and all applicable ORDERs shall be deemed to be
          automatically amended, effective the date this contract is executed,
          and SUPPLIER shall provide the same prices, rates, charges or fees, to
          BELL ATLANTIC; and

     C.   BELL ATLANTIC shall have the right to decline to accept the offering,
          in which event such automatic amendment shall be deemed to be void;

<PAGE>

                                                                 Page 34 of 38

     Provided, however, that (i) any consideration provided to SUPPLIER
     hereunder shall be non-refundable and non-creditable and (ii) BELL ATLANTIC
     adopts all of the additional restriction, obligations and limitations
     imposed in connection with such more favorable offering.

     SUPPLIER's compliance with this clause shall be subject, at BELL ATLANTIC's
     option, to independent verification in accordance with Section 16.3 hereof
     entitled "RECORDS AND AUDIT."

     19.10.   RELEASES VOID
     
     Neither party shall require waivers or releases of  any personal rights 
     from representatives of the other in connection with visits to their 
     respective premises and no such releases or waivers shall be pleaded by 
     SUPPLIER or BELL ATLANTIC in any action or proceeding.

     19.11.   ALTERNATE DISPUTE RESOLUTION
     
          19.11.A.   REFERRAL 

          Should any disagreement, dispute, disputed claim of breach, 
          nonperformance, or repudiation arising from, related to or 
          connected with this AGREEMENT or any of the terms or conditions 
          hereof, or any transactions hereunder ("Dispute"), arise between 
          BELL ATLANTIC and SUPPLIER either during this AGREEMENT or after 
          termination or expiration of this AGREEMENT, either party may give 
          to the other notice of the Dispute, specifically referencing this 
          provision and request resolution of the Dispute.  At the expiration 
          of ten (10) business days, unless it shall have been settled, 
          either party may refer such Dispute to the BELL ATLANTIC's  
          Director, Corporate Sourcing - PICS, Power and Test Equipment and 
          the SUPPLIER's T3AS Product Manager for resolution.. If within an 
          additional ten (10) business days such Dispute shall not have been 
          settled, then either party may refer it to BELL ATLANTIC's 
          Vice-President/Corporate Sourcing  and SUPPLIER's Vice President, 
          Customer Support for resolution.. The parties agree to exchange 
          relevant information and cooperate in good faith to resolve the 
          Dispute under this provision. If within an additional ten (10) 
          business days, such dispute shall not have been settled, the 
          parties agree to resort to the dispute mediation remedies set forth 
          below.  Notwithstanding anything to the contrary, either party 
          shall be entitled to petition a court of competent jurisdiction for 
          the specific, limited purpose of requesting injunctive relief.

          19.11.B.   MEDIATION
     
          A formal mediation procedure may be commenced by either party under 
          the then current Public Resources ("CPR") Model Procedure for 
          Mediation of Business Disputes by notice to CPR to select an 
          experienced neutral mediator and a proposed time and date for 
          mediation.  All mediators shall be selected from the CPR Panel of 
          Neutrals unless the parties mutually agree to a different neutral 
          mediator.  All mediator fees shall be equally shared by the 
          parties.  Each party will pay its own costs and other expenses 
          associated with the mediation, except that the reasonable travel 
          expenses, as outlined in the BELL ATLANTIC Travel Guidelines, 
          incurred by the party, which is more distant from the site of the 
          mediation, shall be shared equally by SUPPLIER and BELL ATLANTIC.  
          The parties shall participate in good faith in the mediation and if 
          the parties reach a resolution of the Dispute, it shall be reduced 
          to writing and shall be enforceable in accordance with its terms.

     If the procedures set forth above do not result in a resolution of the
     dispute satisfactory to both parties within thirty-one (31) calendar days
     of the first notice to CPR to select a mediator, either party may give
     notice in writing to the other party that the mediation procedure is
     terminated.  Upon the issuance of such notice, either party shall have the
     right to pursue such remedies as may be available at law or in equity or
     under this AGREEMENT.

     ALL DISCUSSIONS AND DOCUMENTS PREPARED PURSUANT TO ANY ATTEMPT TO RESOLVE A
     DISPUTE UNDER THIS PROVISION ARE CONFIDENTIAL AND FOR SETTLEMENT PURPOSES
     ONLY AND SHALL NOT BE ADMITTED IN ANY COURT OR OTHER FORUM AS AN ADMISSION
     OR OTHERWISE AGAINST A PARTY FOR ANY PURPOSE INCLUDING THE APPLICABILITY OF
     FEDERAL AND STATE COURT RULES.

     19.12.   INDEPENDENT OBLIGATION OF SUPPLIER TO CONTINUE PERFORMANCE
     
     SUPPLIER assumes an independent obligation to continue performance of 
     its obligations hereunder in all respects regardless of any dispute 
     which may arise between BELL ATLANTIC and SUPPLIER in connection with 
     any claims by SUPPLIER that BELL ATLANTIC has materially breached its 
     obligations hereunder.  Such independent obligation shall continue for 
     thirty-one (31) days from the date upon which BELL ATLANTIC receives 
     written notice of such alleged breach from SUPPLIER.  SUPPLIER 
     undertakes this independent obligation without prejudice to any rights 
     or remedies it may otherwise have in connection with any dispute between 
     SUPPLIER and BELL ATLANTIC.

<PAGE>

                                                                 Page 35 of 38

     19.13. LIABILITY 
     
     All work or SERVICES furnished by SUPPLIER or by persons furnished by 
     SUPPLIER, including its subcontractors (if any) pursuant to this 
     CONTRACT shall be as an Independent Contractor and not as the agent of 
     BELL ATLANTIC.  All persons furnished by SUPPLIER and its subcontractors 
     (if any) shall be considered solely SUPPLIER's and its subcontractors' 
     (if any) employees or agents, and SUPPLIER and its subcontractors (if 
     any) shall be responsible for compliance with all applicable  laws, 
     rules, and regulations including, but not limited to employment of 
     labor, hours of labor, working conditions, worker's compensation, 
     payment of wages, and payment of taxes, such as unemployment, social 
     security and other payroll taxes, including applicable contributions 
     from such persons when required by law.  SUPPLIER and its subcontractors 
     (if any) shall indemnify, hold harmless, and defend BELL ATLANTIC from 
     and against any claim or lawsuits arising out of SUPPLIER's and its 
     subcontractors' (if any) failure to comply with any such laws, rules or 
     regulations.

     SUPPLIER shall indemnify, hold harmless and defend BELL ATLANTIC from and
     against any loss, cost, liabilities, claims or demands (including the
     costs, expenses and attorney's fees) that may be made:  (a) by anyone for
     injuries including death to persons or damage to property including theft,
     resulting from its acts or omissions or those of persons furnished by
     SUPPLIER; (b) by persons furnished by SUPPLIER and its subcontractors (if
     any) under Worker's Compensation or similar acts; (c) by any third party in
     connection with work, PRODUCT, SOFTWARE, DOCUMENTATION, or SERVICES
     provided by SUPPLIER or contemplated by this AGREEMENT; and (d) under any
     federal securities laws or under any other statute, at common law or
     otherwise arising out of or in connection with the performance by SUPPLIER
     contemplated by this AGREEMENT or any information obtained in connection
     with such performance; except, in each case, to the extent such losses are
     caused by the negligence, recklessness or willful misconduct of BELL
     ATLANTIC or any of its AFFILIATES.  SUPPLIER shall not implead or bring any
     action against BELL ATLANTIC and its BELL ATLANTIC Affiliates, their
     respective directors, officers, employees, agents in connection with any
     action by any of SUPPLIER's employees for any personal injury (including
     death) or property damage that occurs in the course or scope of employment
     of such person except to the extent such personal injury or property damage
     is directly caused by the negligence, recklessness or willful misconduct of
     BELL ATLANTIC, any of its AFFILIATES or their employees or agents.  BELL
     ATLANTIC will notify SUPPLIER of any written claims or demands against it
     for which SUPPLIER is responsible hereunder.

     Liability.  Notwithstanding anything else in this contract or otherwise,
     neither party shall  be liable with respect to any subject matter of this
     contract under any contract, negligence, strict liability, or other legal
     or equitable theory for any amounts in excess of that amount which is the
     greater of (i) the aggregate of the amounts paid by BELL ATLANTIC to
     SUPPLIER under this contract during the *period prior to the date the cause
     of action arose, or (ii) *.

     NOTWITHSTANDING ANYTHING ELSE IN THIS CONTRACT OR OTHERWISE, NEITHER PARTY
     SHALL BE LIABLE TO THE OTHER PARTY FOR  ANY AMOUNTS REPRESENTING THEIR LOSS
     OF PROFITS, LOSS OF BUSINESS, OR THEIR INDIRECT, SPECIAL, EXEMPLARY,
     CONSEQUENTIAL OR PUNITIVE DAMAGES, ARISING FROM THE PERFORMANCE OR
     NONPERFORMANCE OF THIS AGREEMENT OR ANY ACTS OR OMISSIONS ASSOCIATED
     THEREWITH, WHETHER THE BASIS OF THE LIABILITY IS BREACH OF AGREEMENT, TORT
     (INCLUDING NEGLIGENCE AND STRICT LIABILITY), STATUTES OR ANY OTHER LEGAL
     THEORY REGARDLESS OF LEGAL THEORY OR FORESEEABILITY.

     19.14.   INSURANCE
     
     SUPPLIER and its subcontractors (if any) agree to purchase and maintain 
     during the term hereof all insurance and/or bonds required by law or 
     this AGREEMENT including without limitation: (a) Workers' Compensation 
     and related insurance as prescribed by the law of the State in which the 
     work is performed; (b) Employers Liability insurance with limits of not 
     less than *per occurrence and in the aggregate; (c) Commercial General 
     Liability insurance, including PRODUCTS Liability and Completed 
     Operation endorsements for a combined single limit of not less than * 
     per occurrence and in the aggregate; and (d) if the use of a motor 
     vehicle is required, Automobile liability coverage for a combined single 
     limit of *.  SUPPLIER shall furnish certificates of insurance evidencing 
     placement of such insurance.  BELL ATLANTIC and BELL ATLANTIC 
     Corporation shall be named as Additional Insureds in the policies 
     referred to in (c) above.

     Certificates furnished by SUPPLIER shall provide that BELL ATLANTIC is to
     be notified in writing, in accordance with Section 19.7 hereof, at least
     twenty (20) days prior to cancellation of, or any PRODUCT change in the
     policy.  SUPPLIER and its subcontractors (if any) shall assume
     responsibility for such notification being given to:
     
          Manager, Customer Support
          BELL ATLANTIC
          240 East 38th Street, 15th Floor
          New York, New York 10016




     *  Confidential portion has been omitted and filed separately with 
        the Secretary of the Commission.
<PAGE>

                                                                 Page 36 of 38

     19.15.   IMPLEADER AND LIMITED LIABILITY OF BELL ATLANTIC
     
     SUPPLIER shall not implead or bring any action against BELL ATLANTIC or 
     its employees based on any claim by any person for personal injury or 
     death that occurs in the course or scope of employment of such person by 
     BELL ATLANTIC for which a claim may be filed under the Worker's 
     Compensation Act and that arises out of the business contemplated under 
     this AGREEMENT except if such personal injury or death is caused by the 
     negligence, recklessness or willful misconduct of BELL ATLANTIC.  

     19.16.   WORK PERFORMED ON BELL ATLANTIC PREMISES
     
          19.16.A.   CLEAN UP  
   
          Upon completion of any work performed under this AGREEMENT or 
          pursuant to ORDERs placed hereunder, SUPPLIER shall promptly remove 
          all implements, surplus PRODUCTs and debris.

          19.16.B.   HARMONY  
     
          SUPPLIER shall be entirely responsible for all persons furnished by 
          it working in harmony with all others working on BELL ATLANTIC 
          premises or those of BELL ATLANTIC's AFFILIATE.

          19.16.C.   PLANT AND WORK RULES  
     
          SUPPLIER's employees, agents and contractors shall, while on BELL 
          ATLANTIC's premises, comply with all plant rules and regulations 
          which have been provided to SUPPLIER, including, where required by 
          government regulations, submission of satisfactory clearance from 
          the U.S. Department of Defense and other Federal authorities 
          concerned.

          19.16.D.   RIGHT OF ACCESS  
     
          Each party shall permit access to the other's respective facilities 
          as reasonably required in connection with work hereunder.  No 
          charge shall be made for such access.  It is agreed that reasonable 
          advance notice will be given when access is required.

          19.16.E.   TOOLS AND EQUIPMENT  
     
          Unless otherwise specifically provided in this AGREEMENT, SUPPLIER 
          shall provide labor, tools and equipment necessary for performance 
          pursuant to an ORDER under this AGREEMENT.

          19.16.F.   WORK HEREUNDER  
     
          It is understood that visits by SUPPLIER's representatives or 
          SUPPLIER's contractor's representatives to perform SUPPLIER's 
          obligations under this AGREEMENT shall for all purposes be deemed 
          "work hereunder" and shall be at no charge to BELL ATLANTIC unless 
          otherwise specifically provided in this AGREEMENT or in another 
          writing signed or duly acknowledged by authorized representatives 
          of both parties.

     19.17.   RIGHTS
     
     The failure of either party to enforce it rights under this AGREEMENT at 
     any time for any period shall not be construed as a waiver of such 
     rights. The rights and remedies of each party shall not be exclusive and 
     are in addition to any other rights and remedies provided by law or 
     under this AGREEMENT.

     19.18.   HEADINGS AND CAPTIONS
     
     Headings and captions are for convenience only and are not to be used in 
     the interpretation of this AGREEMENT.
     

20.  NPRM
     
     Telesector Resources Group, Inc., d/b/a Bell Atlantic Network Services, 
     on behalf of itself and for the benefit of its AFFILIATES (hereinafter, 
     "BELL ATLANTIC" ), has issued to Applied Digital Access ("SUPPLIER") a 
     Request for Proposal ("RFP")  No. 97-7130GG dated July 31, 1997 and a 
     Request for Revised Proposal ("RRP") No. 97-7130GG - Revised dated 
     November 5, 1997 (hereinafter collectively, "RFP") setting forth certain 
     requirements and other information incident to the purchase and 
     deployment of T-1 Network Interface Units with Performance Monitoring 
     Capability.   SUPPLIER has reviewed and analyzed the Bell Atlantic RFP 
     and has developed and submitted to Bell Atlantic its Response dated 
     September 3, 1997 (the "SUPPLIER's RFP Response") and its Response to 
     the Request for Revised Proposal dated November 13, 1997 (the  
     "SUPPLIER's RRP Response").

<PAGE>

                                                                 Page 37 of 38
     
     The SUPPLIER's responses set forth in Sections 1 (Executive Summary), 2
     (Scope of Work/Generic Requirements),  3 (Interoperability with Nynex
     Embedded Equipment), 6 (Manufacturing Capacity), 7 (Warranty), 10 (Quality
     Assurance General Requirements), 11 (Product Documentation Requirements),
     12 (OSMINE Process), 13 (Training), 14 (NYNEX NCTE Repair Program), 15
     (Product Practices) and in the Supplier's Response are incorporated herein
     by reference and SUPPLIER agrees to conform thereto. 
     
     Supplier commits to incorporate NPRM capability, as described and defined
     in ANSI T1.403 - 1997, in accordance with the CTS/T3AS Support Matrix
     attached as Appendix M.
     

21.  ENTIRE AGREEMENT

     This instrument, the Appendices and Schedules attached and the ORDER(s)
     attached hereto, or hereafter issued under this AGREEMENT, constitute and
     embody the entire AGREEMENT by and between the parties hereto and supersede
     all prior oral or written agreements or understandings, if any, between
     them with respect to the subject matter of this AGREEMENT.  In the event of
     a direct conflict between a specific term or condition of this AGREEMENT
     and a specific term or condition in an ORDER, issued and accepted by the
     parties, the specific term or condition in the ORDER shall take precedence
     and control, but only for purposes of that individual ORDER.  All ORDERs
     placed by BELL ATLANTIC shall be deemed to incorporate and be subject to
     the terms and conditions of this AGREEMENT as well as any supplemental
     terms and conditions agreed to by the parties in writing.  No provisions or
     data on an ORDER or in subordinated documents (such as shipping releases)
     or on any document unilaterally originated by either party shall be
     incorporated in this AGREEMENT unless the provisions or data merely supply
     information contemplated by this AGREEMENT.

     The terms and conditions contained in this AGREEMENT supersede all prior
     oral or written understandings between the parties with respect to the
     subject matter of this AGREEMENT.  This AGREEMENT shall not be modified or
     amended except by a writing signed by authorized representatives of both
     parties.  This AGREEMENT may be executed in two or more counterparts, each
     of which shall be deemed an original, but all of which together shall
     constitute one and the same instrument.
     

IN WITNESS WHEREOF, the parties have set their hand and seal intending to be
legally bound on the date indicated below.


Applied Digital Access, Inc.           TELESECTOR RESOURCES GROUP, INC
                                       (A BELL ATLANTIC Company)

By                                     By   
   ---------------------------------      ----------------------------------

Typed Name                             Typed Name     
           -------------------------              --------------------------

Title                                  Title     
      ------------------------------         -------------------------------

                                       Date      
                                            --------------------------------
<PAGE>

                                                         Appendix A - Section 1
                                                                    Page 1 of 2
                                       
                                    APPENDIX A
                                          
                               PRICES AND DISCOUNTS
                                          
This Appendix A is attached to and made part of that certain Agreement No. 
X13938D effective March 1,1998 by and between Bell Atlantic ('Customer') and 
Applied Digital Access, Inc. ('ADA').

1.   NEW EQUIPMENT PRICES

     Discounts will be taken from the unit List Prices stated in the attached
     schedule.
                                        
                     T3AS/CTS EQUIPMENT PRICE DISCOUNT SCHEDULE

                              * DISCOUNT SCHEDULE
                   *Purchase Volume          Discount Percentage
                   ----------------------------------------------
                    ($ in Millions)
                            *                         *
                            *                         *
                            *                         *
                            *                         *
                                         *
                   * Purchase Volume *       Discount Percentage *
                   ----------------------------------------------
                     ($ in Millions) 
                            *                         *

     The Discount Schedule is based on the following terms:

          A)   The Discount Schedule is based on *.

          B)   The discount percentage shall apply to ADA manufacured 
               equipment in the T3AS and CTS product lines only.  The * and * 
               products are discounted separately.  New products may be 
               included in this Appendix A after product standardization and 
               Customer and ADA mutual agreement to incorporate them under 
               the Agreement.
          C)   The Discount Schedule, once volume is obtained, * the Agreement.
          D)   Software and third party manufactured equipment that is resold by
               ADA (i.e., kits, racks, communications bay equipment and hardware
               options) are not subject to discounts.

2.   OUT-OF-WARRANTY REPAIR PRICES

     See attached schedule for detailed unit prices.
     

3.   SUPPLIER TECHNICAL SUPPORT RATES AND CHARGES

     Up to 15 days advance notice may be required for scheduling of 
     non-emergency service calls.
     Telephone Technical Support
          * per hour, weekdays
          * per hour, weekends and statutory holidays
     On-Site Technical Support
          * per hour, weekdays
          * per hour, weekends and statutory holidays
          Plus direct travel and living expenses.




      *  Confidential portion has been omitted and filed separately with 
         the Secretary of the Commission.
<PAGE>

                                                         Appendix A - Section 1
                                                                    Page 2 of 2

4.   ENGINEERING, INSTALLATION AND INSTALLATION SUPPORT SERVICES

     A)   SOFTWARE UPGRADE INSTALLATION (AS DEFINED IN APPENDIX J)
          1)   Installation Assistance
               --  *per session or system if ADA Field Service personnel 
                   available in Customer Region.
               --  * per session or system plus travel and living expenses if 
                   ADA Field Service personnel not available in Customer Region.
          2)   ADA Installation
               --  * per site with 1 system.
               --  * per site with 2 systems.
               --  * per site with 3 or more systems.
               ADA installation pricing is subject to addition of travel and 
               living expenses for the ADA installer.  Site is defined as 
               location CLLI code.

     B)   ALL OTHER ENGINEERING, INSTALLATION AND INSTALLATION SUPPORT SERVICES

          1)   Engineering and Installation Services (as defined in Appendix E)
               --  Specific projects will be quoted upon request.
          2)   Installation Support Services (as defined in Appendix E)
               --  *.

     All prices for Engineering, Installation and Installation Support Services
     can be quoted separately for large projects to provide Customer a volume
     price which may be better than individual site/system prices.




     *  Confidential portion has been omitted and filed separately with 
        the Secretary of the Commission.
<PAGE>

CONFIDENTIAL

                                                          APPENDIX A - SECTION 2
                                                                          PAGE 1
                                    APPENDIX A
                              NEW EQUIPMENT PRICE LIST                    

                                             LIST    DISCOUNT LEVELS:  MATERIAL
PART NUMBER        DESCRIPTION      CLEI     PRICE    *   *   *   *    WARRANTY
- -----------        -----------      ----     -----                     --------
SUBSYSTEMS

 02-0108-00             *             *        *      *   *   *   *        *
 02-0109-00             *             *        *      *   *   *   *        *
 02-0271-00             *             *        *      *   *   *   *        *
 02-0107-00             *             *        *      *   *   *   *        *
 02-0171-00             *             *        *      *   *   *   *        *

ADMINISTRATION SHELF

 02-0102-00             *             *        *      *   *   *   *        *
 02-0110-00             *             *        *      *   *   *   *        *
 02-0111-00             *             *        *      *   *   *   *        *
 02-0113-01             *             *        *      *   *   *   *        *
 02-0116-00             *             *        *      *   *   *   *        *

COMMON PLUG-IN EQUIPMENT

 02-0101-00             *             *        *      *   *   *   *        *
 02-0104-01             *             *        *      *   *   *   *        *
 02-0104-02             *             *        *      *   *   *   *        *
 02-0180-01             *             *        *      *   *   *   *        *
 02-0165-00             *             *        *      *   *   *   *        *
 02-0166-00             *             *        *      *   *   *   *        *
 02-0117-00             *             *        *      *   *   *   *        *
 02-0117-01             *             *        *      *   *   *   *        *

IN-LINE CIRCUIT EQUIPMENT

High-Speed Equipment
 02-0103-00             *             *        *      *   *   *   *        *
 02-0103-01             *             *        *      *   *   *   *        *
 02-0228-01             *             *        *      *   *   *   *        *

Low-Speed Equipment
 02-0172-00             *             *        *      *   *   *   *        *
 02-0173-00             *             *        *      *   *   *   *        *
 02-0175-00             *             *        *      *   *   *   *        *

CIRCUIT TESTING AND DCS INTERFACE EQUIPMENT

 02-0100-00             *             *        *      *   *   *   *        *
 02-0104-01             *             *        *      *   *   *   *        *
 02-0104-02             *             *        *      *   *   *   *        *
 02-0140-01             *             *        *      *   *   *   *        *
 02-0105-00             *             *        *      *   *   *   *        *
 02-0128-00             *             *        *      *   *   *   *        *

T3AS SOFTWARE

System Software
 02-0227-0422           *             *        *      *   *   *   *        *
 02-0227-0430           *             *        *      *   *   *   *        *
 02-0227-0440           *             *        *      *   *   *   *        *




*  Confidential portion has been omitted and filed separately with 
   the Secretary of the Commission.

<PAGE>

CONFIDENTIAL

                                                          APPENDIX A - SECTION 2
                                                                          PAGE 2
                                    APPENDIX A
                              NEW EQUIPMENT PRICE LIST                    

                                             LIST    DISCOUNT LEVELS:  MATERIAL
PART NUMBER        DESCRIPTION      CLEI     PRICE    *   *   *   *    WARRANTY
- -----------        -----------      ----     -----                     --------
Features Software

 02-0162-00               *             *        *      *   *   *   *        *
 02-0278-00               *             *        *      *   *   *   *        *
 02-0182-00               *             *        *      *   *   *   *        *
 02-0232-00               *             *        *      *   *   *   *        *
 02-0249-00               *             *        *      *   *   *   *        *
 02-0247-00               *             *        *      *   *   *   *        *
 02-0248-00               *             *        *      *   *   *   *        *
 02-0250-00               *             *        *      *   *   *   *        *
 02-0230-00               *             *        *      *   *   *   *        *
 02-0244-H0               *             *        *      *   *   *   *        *
 02-0244-00               *             *        *      *   *   *   *        *
 02-0245-00               *             *        *      *   *   *   *        *
 02-0245-H0               *             *        *      *   *   *   *        *
 02-0246-00               *             *        *      *   *   *   *        *

RACKS AND KITS

 02-0193-02               *             *        *      *   *   *   *        *
 02-0193-03               *             *        *      *   *   *   *        *
 02-0193-04               *             *        *      *   *   *   *        *
 02-0197-01               *             *        *      *   *   *   *        *
 02-0197-02               *             *        *      *   *   *   *        *
 02-0197-03               *             *        *      *   *   *   *        *
 02-0268-01               *             *        *      *   *   *   *        *
 02-0268-02               *             *        *      *   *   *   *        *
 02-0268-03               *             *        *      *   *   *   *        *
 02-0131-00               *             *        *      *   *   *   *        *
 02-0132-00               *             *        *      *   *   *   *        *
 02-0177-00               *             *        *      *   *   *   *        *
 02-0168-4440             *             *        *      *   *   *   *        *
 02-0187-00               *             *        *      *   *   *   *        *
 02-0155-00               *             *        *      *   *   *   *        *
 02-0164-00               *             *        *      *   *   *   *        *

COMMUNICATIONS BAY

 02-0137-00               *             *        *      *   *   *   *        *
 14-0139-00               *             *        *      *   *   *   *        *
 14-0110-00               *             *        *      *   *   *   *        *
 13-0151-00               *             *        *      *   *   *   *        *
 14-0140-00               *             *        *      *   *   *   *        *
 14-0142-00               *             *        *      *   *   *   *        *
 02-0147-00               *             *        *      *   *   *   *        *
 14-0116-00               *             *        *      *   *   *   *        *
 02-0133-0020             *             *        *      *   *   *   *        *
 02-0133-0035             *             *        *      *   *   *   *        *
 02-0225-00               *             *        *      *   *   *   *        *
 05-0125-0035             *             *        *      *   *   *   *        *




*  Confidential portion has been omitted and filed separately with 
   the Secretary of the Commission.
<PAGE>

CONFIDENTIAL

                                                          APPENDIX A - SECTION 2
                                                                          PAGE 3
                                    APPENDIX A
                              NEW EQUIPMENT PRICE LIST                    

                                             LIST    DISCOUNT LEVELS:  MATERIAL
PART NUMBER        DESCRIPTION      CLEI     PRICE    *   *   *   *    WARRANTY
- -----------        -----------      ----     -----                     --------
OPTIONS

 02-0215-0430             *             *        *      *   *   *   *        *
 02-0216-0430             *             *        *      *   *   *   *        *
 14-0128-0000             *             *        *      *   *   *   *        *
 14-0113-0000             *             *        *      *   *   *   *        *
 14-0129-0000             *             *        *      *   *   *   *        *
 14-0144-0000             *             *        *      *   *   *   *        *
 14-0130-0000             *             *        *      *   *   *   *        *
 13-0131-0000             *             *        *      *   *   *   *        *
 14-0131-0000             *             *        *      *   *   *   *        *
 14-0151-0000             *             *        *      *   *   *   *        *
 14-0106-0000             *             *        *      *   *   *   *        *
 02-0118-0000             *             *        *      *   *   *   *        *
 02-0119-0000             *             *        *      *   *   *   *        *
 65-0887-0000             *             *        *      *   *   *   *        *
 13-0114-0000             *             *        *      *   *   *   *        *

REMOTE MODULE

 Model 2021               *             *        *      *   *   *   *        *
 Model 2021               *             *        *      *   *   *   *        *
 02-0209-00               *             *        *      *   *   *   *        *
 02-0209-00               *             *        *      *   *   *   *        *
 02-0208-00               *             *        *      *   *   *   *        *
 02-0239-00               *             *        *      *   *   *   *        *
 02-0240-00               *             *        *      *   *   *   *        *




*  Confidential portion has been omitted and filed separately with 
   the Secretary of the Commission.
<PAGE>

CONFIDENTIAL

                                                          APPENDIX A - SECTION A
                                                                          PAGE 1
                       OUT OF WARRANTY REPAIR PRICE LIST
                                       
                                                               REPAIR PRICE IF *
                                                       REPAIR     DISCOUNT IS
PRODUCT NUMBER        CLEI CODE        DESCRIPTION     PRICE       ACHIEVED
- --------------      -------------     -------------   --------  ----------------

02-0100-00                *                 *            *             *
02-0101-00                *                 *            *             *
02-0102-00                *                 *            *             *
02-0103-00                *                 *            *             *
02-0103-00                *                 *            *             *
02-0104-00                *                 *            *             *
02-0104-00                *                 *            *             *
02-0105-00                *                 *            *             *
02-0107-00                *                 *            *             *
02-0108-00                *                 *            *             *
02-0109-00                *                 *            *             *
02-0110-00                *                 *            *             *
02-0111-00                *                 *            *             *
02-0113-00                *                 *            *             *
02-0113-00                *                 *            *             *
02-0116-00                *                 *            *             *
02-0117-00                *                 *            *             *
02-0117-00                *                 *            *             *
02-0128-00                *                 *            *             *
02-0137-00                *                 *            *    **       *
02-0140-00                *                 *            *             *
02-0140-00                *                 *            *             *
02-0165-00                *                 *            *             *
02-0166-00                *                 *            *             *
02-0171-00                *                 *            *             *
02-0172-00                *                 *            *             *
02-0173-00                *                 *            *             *
02-0174-00                *                 *            *             *
02-0175-00                *                 *            *             *
02-0180-00                *                 *            *             *
02-0180-00                *                 *            *             *
02-0228-00                *                 *            *             *
02-0271-00                *                 *            *             *


**  The * (P/N 02-0137-00) is not a repairable item.  The price indicated here 
    is for the purchase of a new unit.




*  Confidential portion has been omitted and filed separately with 
   the Secretary of the Commission.

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<CIK> 0000919048
<NAME> APPLIED DIGITAL ACCESS, INC.
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                           3,134
<SECURITIES>                                     9,876
<RECEIVABLES>                                    9,103
<ALLOWANCES>                                     (100)
<INVENTORY>                                      5,924
<CURRENT-ASSETS>                                30,448
<PP&E>                                          14,089
<DEPRECIATION>                                 (7,829)
<TOTAL-ASSETS>                                  39,887
<CURRENT-LIABILITIES>                           10,213
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        51,998
<OTHER-SE>                                       2,591
<TOTAL-LIABILITY-AND-EQUITY>                    39,887
<SALES>                                         13,852
<TOTAL-REVENUES>                                13,852
<CGS>                                            7,405
<TOTAL-COSTS>                                    7,405
<OTHER-EXPENSES>                                14,515
<LOSS-PROVISION>                                    50
<INTEREST-EXPENSE>                                   2
<INCOME-PRETAX>                                (7,792)
<INCOME-TAX>                                        73
<INCOME-CONTINUING>                            (7,865)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (7,865)
<EPS-PRIMARY>                                   (0.62)
<EPS-DILUTED>                                   (0.62)
        

</TABLE>


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