APPLIED DIGITAL ACCESS INC
10-K, 1997-03-31
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 10-K

[X]    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE 
       ACT OF  1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 1996

[ ]    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)

                 CALIFORNIA                              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)

           SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
                                      NONE

           SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:
                           COMMON STOCK, NO PAR VALUE
                                (TITLE OF CLASS)
                 ---------------------------------------------

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__

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  X
          ----

The  aggregate  market value of the voting stock held by  non-affiliates  of the
registrant,  based upon the closing  sale price of the Common  Stock on February
28,  1997 as  reported  on the  Nasdaq  National  Market,  was  approximately  $
60,265,807.  For the  purposes of this  calculation,  shares  owned by officers,
directors and 5%  shareholders  known to the  registrant  have been deemed to be
owned by affiliates. This determination of affiliate status is not necessarily a
conclusive determination for other purposes.

There were  12,331,239  shares of the  Registrant's  Common Stock, no par value,
outstanding as of February 28, 1997.

                       DOCUMENTS INCORPORATED BY REFERENCE

(1) Portions of the Registrant's  1996 Annual Report to Shareholders,  a copy of
which is  attached  hereto as Exhibit  13.1,  referred  to herein as the "Annual
Report", are incorporated as provided in Part II.

(2)  Portions of the  Registrant's  Proxy  Statement  for the Annual  Meeting of
Shareholders  to be  held  May  20,  1997,  referred  to  herein  as the  "Proxy
Statement", are incorporated as provided in Part III.


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  PART I


ITEM 1.  BUSINESS

     THE DISCUSSION OF THE COMPANY'S BUSINESS CONTAINED IN THIS ANNUAL REPORT ON
FORM 10-K MAY CONTAIN  CERTAIN  FORWARD-LOOKING  STATEMENTS.  FOR  DISCUSSION OF
FACTORS WHICH MAY AFFECT THE OUTCOME  PROJECTED IN SUCH  STATEMENTS,  PLEASE SEE
"RISKS AND  UNCERTAINTIES"  AT PAGES 13 THROUGH 16 OF THIS ANNUAL REPORT ON FORM
10-K.  THE COMPANY  UNDERTAKES NO OBLIGATION TO RELEASE  PUBLICLY THE RESULTS OF
ANY  REVISIONS  TO  THESE  FORWARD-LOOKING   STATEMENTS  TO  RELFECT  EVENTS  OR
CIRCUMSTANCES ARISING AFTER THE DATE HEREOF.

     Applied  Digital Access Inc.  ("ADA" or the "Company") was  incorporated in
California  in August  1987.  The  Company's  headquarters  are  located at 9855
Scranton Road, San Diego,  California  92121,  and its telephone number is (619)
623-2200.

     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' ("TSPs")
networks.  ADA's  products are designed to enable  service  providers 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  service  providers 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   provisioning,
configuration managment, performance management, testing and traffic management.
ADA has approached the industry  demand for network  management  products with a
three-faceted approach: (1) Network Systems and Sensors that provide testing and
performance  monitoring functions as well as selected transport  functions;  (2)
Network  Management  software  that  enables  service  providers to manage their
network  operations;  and (3) Services that are  customized to meet the evolving
needs of our service provider market.  In 1996, the Company formed two strategic
business units:  the Network  Systems and Sensors  business unit and the Network
Management  business unit. The business units are synergistic with the evolution
of the Company from a single product line to multiple product lines. The Network
Systems and Sensors  business unit is built around the  Company's  T3AS products
and services including its T3AS Test and Performance  Monitoring System (T3AS"),
Centralized  Test System ("CTS") and Protocol  Analysis Access System  ("PAAS"),
and the Remote  Module,  a DS1  network  interface  unit  ("NIU").  The  Network
Management  business unit focuses on Operations Systems ("OS") software products
including  Traffic Data  Collection  and  Engineering  System  ("TDC&E"),  Fault
Management   System  ("FMS")  and  OS  design  services  all  acquired   through
acquisitions, as well as Graphical Test Assistant ("GTA") and Sectionalizer.

     The application of ADA's T3AS products enables TSPs telephone  companies to
quickly access high-speed data and voice circuits from remote network management
centers. The Company believes its T3AS system is the only  permanently-installed
system  that can  remotely  access  circuits  at both  the DS3 and DS1  rates to
provide an integrated  suite of test and  performance  monitoring  capabilities.
Using the T3AS system's  test  capabilities,  customer-reported  problems can be
quickly identified and localized without dispatching repair personnel.  The T3AS
system's  performance  monitoring  capabilities help TSPs detect  degradation of
service and initiate action before service to the customer is  interrupted.  The
Company has  primarily  focused  its sales  efforts on the seven  regional  bell
operating companies ("RBOCs") which are under increasing competitive pressure to
provide  high-quality  high-speed data and voice transmission at lower costs. To
date, six of the seven RBOCs, Ameritech,  BellSouth,  NYNEX,  Southwestern Bell,
Pacific Bell, and U S WEST, and a major interexchange  carrier have approved and
are  currently  deploying  the  Company's  T3AS  products.  The Company has sold
equipment to an independent telephone company, Sprint Central  Telephone-Nevada,
and  several  competitive  access  providers,  and has  increased  its sales and
marketing efforts aimed at independent  telephone companies,  competitive access
providers and interexchange carriers.

     In February 1996, the Company acquired certain assets of Applied  Computing
Devices,  Inc. ("ACD"), a company that developed and marketed traffic management
and  fault  management  OS to TSPs.  These  products  are  complementary  to the
Company's  Network  Systems product line. In July,  1996, ADA purchased  certain
assets of MPR Teltech Ltd. ("MPR Teltech"),  a subsidiary of BC TELECOM, Inc. BC
TELECOM, Inc. is Canada's second largest telecommunications  company. The assets
acquired were part of MPR Teltech's operating unit known as the Special Services
Network  division  ("SSN").  SSN  was  an OS  software  development  group  with
expertise in development of network  management  systems for TSPs. SSN developed
OS software primarily for Northern Telecom, Ltd. ("Nortel"). SSN has become part
of ADA's  Canadian  subsidiary,  ADA-Canada,  and develops  network  performance
management OS products for the Company and its customers,  including Nortel. ADA
has also  licensed  certain  technology  from  Nortel  for  Network  Performance
Management applications in connection with the acquisition.

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BACKGROUND


     The volume of digital information transmitted through the telecommunication
system has grown rapidly in recent years.  This growth has been driven primarily
by the proliferation of personal  computers and workstations,  the prevalence of
networking and use of the Internet, the adoption of client/server computing, the
increase in cellular  telephone  and  facsimile  use, and the  deployment of new
digital information applications including multimedia,  video conferencing,  and
image-processing.  As a result,  TSPs  have  been  required  to  rapidly  deploy
high-speed data and voice circuits operating at a 1.54 megabit-per-second  rate,
called  DS1, or T1, and at a 45  megabit-per-second  rate,  called DS3.  The DS3
transmission   rate  is  the  highest   electrical   telecommunication   circuit
transmission rate in North America.

     The  present  structure  of the  telecommunications  industry in the United
States is largely a result of the  court-mandated  divestiture  of AT&T in 1984.
The  AT&T  divestiture  resulted  in  the  creation  of  the  seven  RBOCs,  the
competitive  long  distance  telephone  company  market,  and the  emergence  of
competitive  access providers  ("CAPs") and competitive local exchange companies
("CLECs") which offer local telephone  service in competition  with the RBOCs or
independent telephone companies ("ITOCs"). Regulation through competition is the
philosophy  that  resulted in the breakup of AT&T,  and it  continues  to be the
philosophy  of  the  Federal  Communications  Commission.  The  passage  of  the
Telecommunication Bill of 1996 allows each of these telephone companies to enter
the  territories and businesses of the others.  While the Company  believes that
the new law will bring new opportunities for network equipment suppliers,  it is
too   early  to   assess   the   long-term   impact  of  this  new  law  on  the
telecommunications industry and ADA's business.

     Local telephone companies have faced increased  competition from both CLECs
and  from  the  local  service  competitive  initiatives  of the  long  distance
telephone  companies and will potentially face competition from  non-traditional
providers of telephone service such as cable television  companies.  The Company
believes that many of the new competitive  entrants will continue to focus their
efforts on corporate and government  communications networks which are among the
most  profitable  market  segments.  Customers in these segments  require highly
reliable data and voice communications  circuits to enable them to conduct their
day-to-day business without  interruption.  These new competitors are often able
to offer  higher-quality and lower-cost service than local telephone  companies,
and as a result,  have gained significant  market share in these segments.  This
increased  competition  has brought  pressure on local  telephone  companies  to
protect their  existing  revenue bases by improving the quality of their service
and to reduce their costs.  At the same time,  these local  telephone  companies
continue to re-engineer and downsize their  organizations.  The large reductions
in staff have often  resulted in the loss of highly  experienced  and  technical
people, leaving less experienced staff to operate and maintain the networks.

     Prior  to  the   divestiture,   AT&T   was   responsible   for   end-to-end
telecommunication  service.  When problems occurred with a telephone connection,
customers called AT&T to diagnose and fix the problem.  Today,  however,  a long
distance  data or voice  circuit often  involves  three or more TSPs:  the local
telephone  companies  on each  end  and  the  long  distance  telephone  company
providing the connection  between the two local  companies.  Responsibility  for
service in long distance  high-speed data and voice networks is transferred from
one carrier to another at their network boundaries.

     The  Company  believes  that  the  segmentation  of the  telecommunications
network has made it more  difficult  for  telephone  companies  to identify  and
respond to problems in their networks.  For example,  many stock brokerage firms
communicate  real-time  stock  quotes and buy and sell  orders to and from their
brokers over high-speed data communications  lines. Such firms monitor their own
circuits and can detect when data communications service begins to degrade. When
a degradation in service is noted,  the  telecommunications  manager of the firm
contacts the  telephone  company  that manages the network - typically  the long
distance carrier.  Initially,  the long distance telephone company does not know
where the problem is located and must  initiate  three trouble  reports,  one in
each local telephone company and one in its own company.  Each telephone company
then dispatches multiple repair crews with portable test equipment to attempt to
locate  the  problem.  Typically,  repair  crews are  dispatched  to a number of
locations,  including  the network  boundary  between the long  distance and the
local telephone company, the

                                       3

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telephone  building  nearest  the user,  and to outside  facilities  such as the
cables and equipment  beneath  streets and on poles between the central  offices
and the end-user  customer.  This system of  maintenance  results in a number of
inefficiencies. For example, the Company believes telephone company repair crews
often incur needless  expense only to report "no trouble  found."  Despite their
best efforts, repair crews often inadvertently interrupt or damage circuits that
are working and may make unnecessary repairs.

     Long distance  telephone  companies  measure quality of service provided by
the  local   telephone   companies   in  two   principal   ways:   failure  rate
(customer-reported    troubles    per   100    circuits    per    month),    and
mean-time-to-restore  (the time  needed to respond to and  resolve a  customer's
complaint).  These measures frequently influence long distance telephone company
and end-user  customer  decisions about which local telephone company to use. To
date, local telephone  companies' level of services  measured by these standards
has often placed them at a competitive disadvantage.  In order to reduce failure
rates and improve  restoration times, the Company believes  telephone  companies
are motivated to change the traditional  methods of handling service problems as
described above. They are looking for solutions that do not require  dispatching
repair crews with portable test  equipment  when  problems  occur and,  instead,
allow them to monitor circuits remotely from a central management site. They are
also seeking  effective  methods of remotely  testing and monitoring DS3 and DS1
circuits at the network boundary.  Finally,  telephone  companies are looking to
improve  their  quality  of  service  by moving  from  reactive  maintenance  to
preventive maintenance through performance monitoring. These network quality and
performance requirements have created a need for a cost-effective solution.


THE APPLIED DIGITAL ACCESS SOLUTION

     ADA focuses on providing Network Performance  Management solutions to TSPs.
These  solutions  are  comprised  of  products  that  address  traffic,   fault,
performance,  and test  management.  The Company has  focused its  research  and
development  activities on creating  products that provide  answers,  instead of
data, to telecommunications  service providers, and on making network management
easier.

     ADA developed the T3AS, the first permanently  installed network element to
remotely  access  the  network  at both the DS3 and the DS1 rates  providing  an
integrated  suite  of test  and  performance  monitoring  capabilities.  ADA has
enhanced T3AS and has developed additional network elements,  such as CTS, PAAS,
and Remote Module.

     The Company believes its T3AS products enable TSPs to greatly improve their
reliability of service,  reduce circuit repair time,  reduce network  management
expense, and proactively maintain network quality. By providing remote access to
DS3 and DS1 circuits  located at network  boundaries from the telephone  company
network  management  centers,  the T3AS products  allow  telephone  companies to
remotely test individual circuits reported as problematic within seconds instead
of hours.  The  continuous  monitoring  capability of T3AS allows TSPs to detect
circuit  degradation  before  receiving  customer  complaints,  and to  initiate
maintenance  actions  to  restore  the  circuit  to full  functionality  without
affecting the end-user.  Finally,  the Company  believes  proactive  maintenance
enabled by  performance  monitoring  can  reduce  the number of trouble  reports
initiated by end-users.

     ADA's Remote  Module,  a DS1 NIU,  enables TSPs to identify  where reported
troubles are located.  When DS1 services are monitored  with T3AS and the Remote
Module,  telephone  companies  can  nonintrusively  isolate  troubles  on  these
circuits.  Additionally,  these  products  monitor  the  performance  of the DS1
service on a full-time  basis.  The Company  refers to this  application  of its
products as Network Administrative Boundary  Sectionalization.  This application
addresses the multiple  boundaries and multiple hand-offs that TSPs must perform
in order to provide a service or set of services to end-users.

     TSPs position T3AS systems  (installed at the network  boundary between the
long distance  telephone company and the local telephone company) in combination
with Remote Modules (installed on DS1 services at the boundary between the local
telephone  company and the-end user) to immediately  determine  whether reported
troubles are in their  network.  This enables the telephone  companies to reduce
their  mean-time-to-restore,  since  responsibility  for problems is immediately
localized to the responsible telephone company, and repair crews that would have
been  dispatched  unnecessarily  can now focus on troubles that really are their
responsibility.  When dispatching repair crews is necessary, the T3AS system can
localize the problem to allow more efficient deployment.

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As a result,  the total  number of work crews in the field is  reduced,  thereby
reducing the number of inadvertent interruptions of operational circuits and the
subsequent initiation of new trouble reports.

     Through acquistion and internal development,  the Company has added network
management  software  products  and  services  that are  complementary  to ADA's
network  element product line,  customer base, and focus on Network  Performance
Management.

STRATEGY

     The Company  seeks to  maintain  its  leadership  position as a supplier of
network performance management systems for high-speed  telecommunication service
providers  and  to  become  a  leading  provider  of OS  solutions  for  network
management of telecommunications networks by:

     1.   FOCUSING SALES AND MARKETING EFFORTS ON TSPs WITH LARGE
          NETWORKS.

ADA's initial sales have been to the RBOCs and their  affiliates,  all of which,
have a  compelling  need to  improve  the  quality  and reduce the cost of their
services. Competitive pressures are forcing telephone companies to move toward a
centralized  network  management  infrastructure  that uses  integrated test and
performance  monitoring  systems.  The Company has broadened  Aits target market
with  applications  that are  appropriate  for  CAPs,  long  distance  telephone
companies, and other telephone service providers.

     2.   DEVELOPING PRODUCTS FOR NETWORK BOUNDARY APPLICATIONS.

     The initial  application for the Company's products has been at the network
boundary  between the long distance  telephone  company and the local  telephone
company.  Installation of the T3AS system at these  boundaries  allows the local
telephone  company to  quickly  determine  if a  reported  trouble is within its
network.  It also allows the local telephone  companies to continuously  monitor
their  circuits  and  react to  degradation  of the  signal  before  service  is
affected.  With the Company's Remote Module, a DS1 NIU, the boundary between the
local  telephone   company  and  the  end-user  can  now  be  continuously   and
nonintrusively  monitored.  The combination of these two products'  capabilities
enables telephone companies to improve their ability to address the increasingly
competitive business environment.


     3   DEVELOPING  AND ENHANCING  PRODUCTS AND SERVICES TO ADDRESS OS.

     The Company is  extending  its current  product  line and market to address
selected  applications  within the OS function.  OS are computer  software-based
systems that provide operations support for telecommunications functions. The OS
market is very large and its applications  have  historically  been addressed by
companies  such as AT&T and  Bellcore.  Some of the older  products  from  these
suppliers,  called "legacy systems," can no longer provide  telephone  companies
with the  real-time  information  that is needed to  manage  complex  high-speed
telecommunications  networks.  The market  for  intelligent  network  management
systems has become  fragmented,  and the Company  perceives a need for solutions
that  address  the  OS  applications  of  testing,   surveillance,   performance
monitoring and traffic management, among others.

     4   EXPANDING TO OTHER APPLICATIONS.

     The  Company  believes  that there are  additional  applications  for ADA's
product  line that  extend its  utility to the  network  boundaries  between the
telephone  companies  and other  users,  such as corporate  customers,  cellular
telephone  companies,  cable television  companies,  and other telephone service
providers.

     5   DEVELOPING PRODUCTS TO ADDRESS NEW TRANSMISSION STANDARDS.

     The Company intends to extend its current products and develop new products
to accommodate new  telecommunication  transmission  standards such as SONET and
SDH  optical  transmission  standards,  which  are  expected  to  receive  broad
acceptance in the North America and international markets, respectively.

    

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PRODUCTS

         NETWORK SYSTEMS AND SENSORS

         T3AS SYSTEM

         The Company's first product, the T3AS system, is an integrated test and
performance  monitoring system for high-speed  telecommunications  networks. The
T3AS system connects to the network at boundaries where many telephone  circuits
are combined,  and where access to individual  circuits or groups of circuits is
often   difficult.   The   Company   believes   its  T3AS  system  is  the  only
permanently-installed  network  management system remotely accessing circuits at
the DS3 and DS1 rates that provides an integrated  suite of test and performance
monitoring  capabilities,  including  performance  monitoring  of  DS3  and  DS1
circuits  and  testing of embedded  DS1,  DS0 and  subrate  circuits.  (Each DS3
circuit contains 28 DS1 circuits and 672 DS0 circuits. Each DS1 circuit contains
24 DS0 circuits. A DS0 circuit provides basic voice telephone service.) The T3AS
system interfaces with the TSPs network  management OS using industry-  standard
interfaces  and  protocols.  T3AS also  interfaces  with  digital  cross-connect
systems in the telephone  network to provide  additional  test  capability  when
circuit access is provided through such systems.  The T3AS system supports up to
48 DS3  circuits,  or 1,120 DS1 circuits  when  accessing the network at the DS1
rate of transmission.

         A fully  configured  T3AS  system  occupies  two  seven-foot  telephone
equipment racks. The T3AS system can be configured to meet the specific needs of
a customer by  selecting  an  appropriate  set of modules from a set of standard
modules. List prices for T3AS systems,  including recommended spare modules, can
range from approximately $60,000 to $650,000, depending on the number and mix of
standard modules selected by the customer.

         T3AS DISTRIBUTED SYSTEM

         The  Company's  Distributed  System  allows  individual  High-Speed  or
Low-Speed  Subsystems  to be installed  at  locations  remote from the T3AS Base
System. The Distributed System supports  applications where the number of DS3 or
DS1 circuits at a particular remote location does not warrant the cost of a full
T3AS system,  such as at network  boundaries with fewer than six DS3 circuits or
140 DS1 circuits between a local telephone company and a long distance telephone
company,  and at network  boundaries between the local telephone company and the
end-user.  Users can  easily  upgrade  their  existing  T3AS  systems  by adding
Distributed System hardware modules and software.

         LOW-SPEED SUBSYSTEM

         The Low-Speed Subsystem expands the Company's product line by providing
test  and  performance   monitoring   capabilities  for  DS1  circuits.  This  
subsystem is intended for network  boundaries  where  circuits  cross at the DS1
rate.  The Low-Speed  Subsystem  units are  interchangeable  with the High-Speed
Subsystem  units in the T3AS racks.  Each Low-Speed  Subsystem has a capacity of
140  DS1  circuits  and  can  be  deployed  in a  Distributed  System  to  share
administration  and test  resources  with the other  subsystems of the T3AS Base
System.

         T3AS CENTRALIZED TEST SYSTEM

         The  T3AS  platform  was  designed  to be a highly  flexible,  scalable
platform  that  enables  TSPs  to  use  the  system  in a  traditional  testhead
configuration.  Telephone networks that employ digital  cross-connect systems or
SONET  add-drop   multiplexers   require  test  access  for  circuits  that  are
transported  within those systems.  The T3AS Centralized Test System consists of
the Test Resource  Subsystem and the  Administration  Subsystem,  in addition to
application  software to provide this capability.  The T3AS's full complement of
test suites is  available  to TSP network  management  centers.  This product is
installed  where test access is highly  critical  and  efficient  use of network
resources is important.

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<PAGE>

         PROTOCOL ANALYSIS ACCESS SYSTEM

         The T3AS  platform  can be  configured  to provide  access to broadband
circuits  that are  provisioned  for advanced data services such as frame relay,
SMDS or ATM. Surveillance and testing capabilities in broadband networks may not
be as  automated  as they  are in  traditional  telephone  networks.  Diagnosing
troubles  within  the  network  often  requires   coordination   among  multiple
organizations  and dispatches to customer sites.  PAAS provides  circuit testing
and connects circuits to a protocol analyzer for more detailed  troubleshooting.
T3AS PAAS provides a cost-effective method to access circuits from a centralized
network management center.

         REMOTE MODULE

         ADA's  Remote  Module is an  intelligent  DS1 NIU that  non-intrusively
monitors  the  performance  of DS1  circuits.  Installed  at network  boundaries
between the local TSP and the end-user,  the Remote  Module  enables the service
provider  to  determine  whether  circuit  troubles  originated  in the  service
provider's  network or in the  end-user's  network.  When installed at the local
service provider's network boundary at the customer premises, and in tandem with
a T3AS  system at the  network  boundary  between  the long  distance  telephone
company and the local  service  provider,  the Remote  Module  provides a unique
end-to-end view of the DS1 circuit.  This view of  service-level  performance is
critical  to  improve  service  quality  and  reliability  and to reduce  costs.
Telephone network management centers can view a DS1 circuit within their network
and beyond the boundaries of their network, and can quickly identify and isolate
failures from the performance monitoring information available.

         NETWORK MANAGEMENT SOFTWARE

         GRAPHICAL TEST ASSISTANT

         The Graphical Test Assistant (GTA) is a graphical test front-end system
to  T3AS  and  CTS  for  DS0,   DS1  and  DS3  testing.   GTA  provides   simple
point-and-click access to all T3AS and CTS testing functionality on a Windows NT
or Windows 95 platform.  While primarily  designed for service providers without
test OS, GTA also complements existing test OS by augmenting functionality.

         SECTIONALIZER

         Sectionalizer  is the  driving  force  behind  ADA's  Network  Boundary
Sectionalization   application.   This  software  presents  a  simple  graphical
representation of the DS1 circuit and highlights the portion of the circuit that
is responsible  for  degradation  in  performance.  Sectionalizer  also provides
second-by-second  information  regarding circuit performance and stores up to 30
days of circuit  history  for use by network  management  personnel  to research
intermittent  circuit  troubles.  The  intelligence of network elements like the
T3AS and the Remote Module, in combination with Sectionalizer software,  enables
TSPs to take a proactive  perspective  in managing their  networks.  This is the
first time that answers to  identified  troubles can be seen in minutes,  rather
than hours.

         TRAFFIC DATA COLLECTION AND ENGINEERING

         Traffic  Data  Collection  and   Engineering   (TDC&E)  is  a  software
application  that provides the capability to collect traffic data from a variety
of existing network  elements,  in addition to emerging network elements such as
ATM switches.  TDC&E supports all major traffic engineering functions and  lends
an accurate, quantifiable reporting mechanism to marketing and quality assurance
functions.

         FAULT MANAGEMENT SYSTEM

         Fault Management System (FMS), is an alarm and network  surveillance OS
that is used in  combination  with other OS software  installed in TSP networks.
This  application is designed to receive and analyze  information  about managed
network elements.  Key features of this system include real-time event and alarm
acquisition, event processing and correlation, and historical fault analysis and
reporting.  In  addition,  automated  responses  can be  programmed  based  upon
selected event occurrences.  FMS provides  operational system features to manage
the state of a multi-network-element, multi-vendor hybrid network.

                                       7
<PAGE>

CUSTOMERS

         The Company  sells its products and services to the  telecommunications
service provider network management market which consists of the seven RBOCs and
their  local  telephone  company   affiliates,   the  ITOCs,  CAPs,  CLECs,  the
interexchange  carriers,  and enterprise networks. The Company's network systems
products conform to the North American  transmission  standard.  Countries which
conform to this standard include the United States,  Canada,  Taiwan, Korea and,
at the DS1 level or below,  Japan. The Company's  initial marketing efforts have
focused on the RBOCs.  Accordingly,  at present the  Company's  customer base is
highly concentrated.  To date,  substantially all of the Company's revenues have
been  derived  from five  RBOCs.  To date,  six of the seven  RBOCs,  Ameritech,
BellSouth,  NYNEX, Pacific Bell,  Southwestern Bell and U S WEST, have qualified
and deployed the Company's T3AS products.  The Company has sold equipment to one
ITOC, Sprint Central Telephone-Nevada and two CAPs, and has stepped up its sales
and  marketing  efforts  aimed  at  ITOCs,  CAPs  and  long  distance  telephone
companies.  Additionally,  one system has been sold  through a  distributor  and
deployed at the government  telephone company in Taiwan.  The acquisition of ACD
has brought new ITOC and CAP customers to the Company, such as GTE, Metropolitan
Fiber Systems,  Teleport  Communications  Group, Intelcom Group Access Services,
and Frontier Communications.  The SSN acquisition added Nortel and Bell Sygma as
customers for the Company's OS design services.

         BellSouth,  U S WEST, Ameritech and Southwestern Bell have entered into
purchase  contracts  with the  Company.  The other two RBOCs and Sprint  Central
Telephone-Nevada purchase the Company's products under standard purchase orders.
Since the BellSouth,  U S WEST, Ameritech and Southwestern Bell contracts may be
terminated  at their  convenience,  the  Company  believes  that  selling to its
customers  under these  contracts is not materially  different  than  purchasing
under purchase orders.  The RBOCs are significantly  larger than the Company and
may be able to exert a high degree of influence over the Company. In addition, a
small number of customers has historically  accounted for  substantially  all of
the Company's revenue in any given fiscal period.

         The  seven  RBOCs  are  NYNEX,  Bell  Atlantic,  BellSouth,  Ameritech,
Southwestern  Bell, U S WEST and Pacific  Bell.  An RBOC may have several  local
telephone company affiliates within its territory.  Prior to selling products to
an RBOC,  a vendor must first  undergo a product  qualification  process for its
product  with the  RBOC.  The  Company  typically  spends  from six to 18 months
discussing  its T3AS  products with a potential  customer  prior to the customer
agreeing to put the product  through its  qualification  process.  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 and generally consists of the following phases:

          - LABORATORY  EVALUATION.  The product's  function and performance are
     tested   against  all   relevant   industry   standards,   including   Bell
     Communications, Inc. ("Bellcore") standards. This process can take from two
     weeks to three months depending on a variety of factors.

          - FIELD  TRIAL.  A number of  telephone  lines are  equipped  with the
     product for  simulated  operation in a field trial lasting from three weeks
     to three months.  These field trials are used to evaluate  performance,  to
     assess  the  ease  of   installation   and  to  establish   troubleshooting
     procedures.  The RBOCs grant  conditional  product approval upon successful
     completion  of a field trial,  enabling  field  personnel to order  limited
     quantities of the product under one-time approvals.

          - FIRST  OFFICE  APPLICATION.  In a  first  office  application,  live
     circuits  are  placed on the T3AS  system.  The system is then used on live
     circuits for periods ranging from one to six months to verify functionality
     and operation.

          - PRODUCT  SELECTION AND  DEPLOYMENT.  Prior to product  selection and
     deployment  which may take from one to four months,  the RBOC  develops and
     implements  a variety  of  methods  and  procedures  that  cover  ordering,
     stocking,  installation,  maintenance,  returns  and all  other  activities
     associated with the use of the product.

         The loss of one or more of the Company's major customers, the reduction
of orders or a delay in deployment of the Company's  products  could  materially
and adversely  affect the Company's  business,  operating  results and financial
condition.  Further,  any  failure  on the part of any of the RBOCs to  maintain
their approval of the Company's products,  failure of any of the RBOCs to deploy
the  Company's  products  or  any  attempt  by  any of the  RBOCs  to  seek  out
alternative  suppliers  could have a material  adverse  effect on the  Company's
business,  operating results and financial condition. In addition,  there can be
no assurance that the Company's products will be approved by new customers,

                                       8

<PAGE>

or that such approval will not be significantly delayed.  Furthermore, RBOC work
force  reductions  and  staff   reassignments   have  in  the  past  delayed  or
indefinitely postponed the product approval process and the Company expects such
reductions  and  reassignments  to  continue  in  the  future.  There  can be no
assurance that the impact of such reductions and  reassignments  will not have a
material  adverse  effect  on the  Company's  business,  operating  results  and
financial condition.

TECHNOLOGY

     The T3AS  system  consists  of a  real-time  OS and an  extensive  suite of
proprietary  applications  software that is executed on proprietary  distributed
processing hardware.  The operating system implements the distributed processing
functionality of T3AS by linking,  in a maximum  capacity system,  more than 350
dedicated  microprocessors  in  a  real-time  computing  environment.  The  T3AS
software architecture is designed to enable new system features and capabilities
to be installed easily through field software  upgrades.  Up to 145 simultaneous
users can be supported by the T3AS system. All performance monitoring parameters
and   telephone   circuit  tests  have  been   verified  for   compliance   with
Bellcore-published  technical requirements,  by Bellcore, and also independently
verified by the Company's customers.

     The  Company's  software and hardware  architecture  facilitates  important
system capabilities such as fault tolerance and hitless access.  Fault tolerance
provides a one-to-one  redundant  circuit path that provides backup for each DS3
and DS1 circuit.  DS3 and DS1 circuits may be  transferred  from the online main
path to the  redundant  standby path  without  disruption  of the embedded  data
streams.  Transfers  are  accomplished  automatically  if a hardware or software
malfunction is detected in the T3AS system.  Transfers can also be  accomplished
manually when telephone company personnel initiate maintenance actions. "Hitless
access" is an industry  term used to describe a method of obtaining  access to a
low-speed  circuit embedded in a high-speed  circuit without affecting any other
circuit embedded in the high-speed  circuit.  In the T3AS system,  the Company's
proprietary  technology  provides  access to the DS3  circuit,  any embedded DS1
circuit,  DS0 circuit,  or other subrate  circuit,  without  affecting any other
circuit within the DS3 circuit.

     The Company has submitted  contributions to the appropriate  working groups
within  the T1El and T1M1  standards  bodies to  standardize  the two new status
signals for sectionalization of network trouble on DSl circuits.

RESEARCH AND PRODUCT DEVELOPMENT

     The Company believes its future success will depend in part on its ability,
on a cost-effective  and timely basis, to continue to enhance T3AS products,  to
develop  and  introduce  new  products  for  the  telephone   network  test  and
performance-monitoring  market  and  other  markets,  to  address  new  industry
transmission  standards and changing  customer needs and to achieve broad market
acceptance for its products.  Therefore, the Company intends to continue to make
significant investments in research and product development.

     Product  line  extensions  require  the  Company to work  closely  with its
current and potential  customers.  Using feedback  received from such customers,
the Company  identifies and then develops new products and  enhancements  to its
existing  products that the Company  believes will increase their  usefulness or
extend their  application.  Examples of product  extensions  of the T3AS include
CTS, PAAS,  Distributed  System and the Low-Speed  subsystem.  In addition,  the
Company  continually seeks to reduce the  manufacturing  cost of its products by
taking advantage of advances in hardware technology.  Finally, new technologies,
such as SONET, SDH, Frame Relay, ATM, and the newly-created standard for testing
of DS3 circuits,  are the focus of significant  research and product development
activity  at ADA.  The  Company  anticipates  that  the  SONET  and SDH  optical
transmission  standards will become the industry standards over the coming years
for the North American and international networks,  respectively.  The Company's
current  T3AS  products  do not  address  either  the SONET or SDH  transmission
standards.

     The  market  for  the  Company's   products  is   characterized   by  rapid
technological  advances,  evolving industry transmission  standards,  changes in
customer  requirements and frequent new product  introductions and enhancements.
The introduction of telecommunications  network test and performance  monitoring
products  involving  superior  technologies  or  the  evolution  of  alternative
technologies or new industry  transmission  standards could render the Company's
existing

                                        9

<PAGE>


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 test and performance monitoring market and other markets, to address new
industry transmission standards and changing customer needs and to achieve broad
market acceptance for its products.

     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 a
product  which  addresses  such  transmission  standards  could  in  the  future
adversely affect the sale and deployment of the Company's products.  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 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.

     In fiscal  1994,  1995,  and 1996,  the Company  spent $5.3  million,  $5.8
million and $7.4 million,  respectively,  on internal  research and  development
efforts.


MANUFACTURING AND SUPPLIERS

     The  Company's  manufacturing  operations  consist  primarily  of  material
planning and procurement,  final assembly, module testing, burn-in, final system
testing and quality  control.  The Company  procures all components from outside
manufacturers  and believes it has good  relationships  with its suppliers.  All
final  assembly  and  tests  are  completed  by the  Company  at its  production
facility.  The Company utilizes  contract  manufacturing  (both  consignment and
turnkey  operations)  for the  assembly  of  certain  sub-assemblies,  including
printed circuit board modules.  The Company also purchases  sub-assemblies  that
have been  modified to the  Company's  specifications  from  original  equipment
manufacturers.

     In January 1997, the Company acheived ISO 9001 certification for its 
headquarters  facility  in San  Diego,  California.  The  Company  was  formerly
registered to the internationally recognized ISO 9001 standards by Bellcore, its
registrar.  ISO 9001  Quality  Standards  were  developed  by the  International
Organization for Standardization. It is a quality system standard for ensuring a
total quality management system in engineering and  manufacturing.  The scope of
the   Company's   registration   is   for   the   design   and   manfacture   of
telecommunications network performance management products, including associated
software that help telecommunications providers manage their networks.

     All products are  rigorously  tested  prior to shipment to  customers.  All
printed circuit board modules are tested  individually  and as part of a system.
The  Company's  quality  control  program is modeled  to  support  the  Bellcore
standards. To date, the Company has not experienced significant field failures.

     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.  There can be no assurance that the Company will
not experience product recalls in the future. The cost of any subsequent product
recall could have a material adverse effect on the Company's business, operating
results and  financial  condition.  In addition,  the Company  could  materially
suffer from the potential negative publicity associated with a recall.

     Generally,  the Company uses industry standard components for its products.
Some components, however, including VLSI ASICs, are custom made to the Company's
specifications.  Certain components used in the Company's T3AS and Remote Module
products, including its VLSI ASICs, are currently available from only one source
and other  components are available  from only a limited number of sources.  The
Company has no 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  of products  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
product  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  reduction  in  product
shipments,  which in turn could have a material  adverse effect on the Company's
customer relationships and operating results.

                                       10

<PAGE>


     Additionally,   the  Company  uses  third-party   subcontractors   for  the
manufacture of its  subassemblies.  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.  Shortages  of  raw  materials  to  or  production  capacity
constraints  at  the  Company's   subcontractors  could  negatively  affect  the
Company's  ability to meet its  production  obligations  and result in increased
prices for affected parts. To procure adequate  supplies of certain  components,
the  Company  must  make  advance   commitments  to  purchase  relatively  large
quantities  of  such  components  in a  number  of  circumstances.  The  Company
believes,  however, that by relying on a limited number of suppliers, it is in a
better  position  to control  quality,  reduce  manufacturing  costs and improve
product standardization.

     To procure adequate supplies of certain  components,  the Company must make
advance  commitments to purchase  relatively large quantities of such components
in a number of  circumstances.  At  December  31,  1996,  the  Company  had open
noncancellable  purchase  commitments  of  approximately  $3.4 million  covering
several  different  components.  A  large  portion  of  the  Company's  purchase
commitments  consist 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 incorporate such components in its products could have a material
adverse  effect on the  Company's  business,  operating  results  and  financial
condition.

MARKETING, SALES AND CUSTOMER SUPPORT

     The Company  markets  its  products  to the RBOCs,  their  local  telephone
company  affiliates,   ITOCs,  CAPs  and  long  distance  companies  through  an
experienced direct sales force that works closely with senior management as well
as the network  management  departments of these  customers as part of the sales
effort. As of February 28, 1997, the Company's sales organization consisted of 9
professionals,  including 8 regional sales managers and one vice president. Each
of the  regional  sales  managers  operates  from a site located near his or her
strategic responsibility.  The sales managers are located in Arizona,  Colorado,
Georgia, Illinois, Indiana, Kansas, New York and Texas.

     The Company also provides engineering and installation services ("E&I") for
customers.  These  services  are  performed  at the  customer  site and  involve
assisting the customer with the installation of the Company's  products into the
customers  network  structure.  These services are performed by customer support
field applications and field support engineers.

     All service,  repair and technical  support of the  Company's  products are
performed  in-house.  The Company  also  provides  comprehensive  on-site  field
support to its customers.  The Company offers technical support to its customers
on a  24-hours-a-day,  7-days-a-week  basis.  The  Company's  standard  hardware
warranty is two years. Its standard software warranty is one year.

BACKLOG

     At December 31, 1996, ADA had a firm backlog of  approximately  $1,885,000.
All of the  Company's  backlog at  December  31,  1996 is  expected to be filled
during  fiscal  1997.  At  December  31,  1995,   ADA  had  a  firm  backlog  of
approximately $5,047,000. Customers have placed orders quarterly and the Company
has been operating in a book-and-ship mode, a trend the Company anticipates will
continue.  There can be no  assurance  that the  current  level of backlog  will
continue.  In addition,  since orders constituting the Company's current backlog
are subject to changes in delivery schedules,  the backlog is not necessarily an
indication of future revenue.

     In certain  cases,  ADA may permit  orders to be canceled  without  penalty
where management believes it may be in the best interests of ADA to do so. There
have been no cases to date where ADA's management  believed it to be in the best
interests of the Company to permit  customers to cancel  outstanding  orders and
the Company  does not  currently  expect to permit  customers to cancel any such
orders  in the  future.  To date,  cancellation  of system  orders  has not been
material.

                                       11


<PAGE>

COMPETITION

     Although  other  competititors   provide  partial  testing  and  monitoring
solutions  to the  telecommunications  network  management  market,  the Company
believes  there  are  currently  no  competitors   that  provide  an  integrated
comprehensive  solution to performance monitoring and testing of the DS3 circuit
as  does  the  Company's  T3AS  system.   The  Company  believes  the  principal
competitive  factors in this  market are  conformance  with  Bellcore  and other
industry transmission standards and specifications;  product features, including
price,  performance and reliability;  technical support;  and the maintenance of
close working  relationships with customers.  There can be no assurance that the
Company will compete successfully in the future with respect to these factors.

     Although  the  Company  believes  that  there  are  fewer  than 10  current
competitors that provide partial solutions to either  performance  monitoring or
testing of the DS1 or DS0 circuits that make up the DS3 circuit,  this market is
fiercely  competitive.  Such competitors and prospective  competitors  include a
number of companies, such as manufacturers of DS1 test and monitoring equipment,
manufacturers  of  NIUs,   manufacturers  of  digital   cross-connect  test  and
performance   monitoring  equipment  and  manufacturers  of  large  transmission
equipment.  Many of these  companies  manufacture  products  that  are  directly
competitive  with the Company's  Low-Speed  Subsystems,  T3AS  Centralized  Test
Systems and Remote  Module,  and many of these  competitors  have  significantly
greater technical,  financial,  manufacturing,  and marketing resources than the
Company.  In addition,  the Company  believes there are an increasing  number of
current  competitors in the OS market that provide OS applications  for testing,
surveillance,    performance    monitoring    and    traffic    management    of
telecommunications   functions.  In  each  of  the  NIU,  CTS  and  OS  markets,
competition is expected to increase  significantly in the future.  For instance,
the NIU market is fiercely  competitive with respect to price, product features,
established  suppliers,  and conformance with industry standards.  In the OS
market,  improved  technologies and tool sets have made the barriers to entry in
this market relatively small.

     Several of the Company's  competitors have  long-established  relationships
with the Company's current and prospective customers.  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.


PROPRIETARY RIGHTS

     ADA  relies  on  a  combination  of  technical  leadership,  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 customer's needs.  Currently,  the Company has
six U.S. patents granted and two U.S. patent applications  allowed.  One of the
granted  patents relates to the Company's  Remote Module product.  Additionally,
the Company has nine  pending U.S.  patent  applications  and two  international
(Patent  Cooperation  Treaty)  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.

     The Company  believes that the rapid rate of  technological  change and the
relatively long development  cycle for integrated  circuits are also significant
factors in the protection of the Company's proprietary  position.  The Company's
proprietary  VLSI ASICs  incorporate  unique  system  architectures  and circuit
approaches that have been developed through a broad,  in-depth  understanding of
the telephone network.  Availability of these proprietary devices, knowledge and
experience  of  the  Company's  personnel,   new  product  development,   market
recognition  and  product  support  are key  factors  in the  protection  of the
Company's proprietary position. As part of its confidentiality  procedures,  the
Company generally enters into  non-disclosure  agreements with its employees 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 not aware of any  infringement  by its products or

                                       12


<PAGE>

technology of the proprietary  rights of others.  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  against  the  Company  could
materially and adversely  affect the Company's  business,  results of operations
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.

EMPLOYEES

     As of  Feb  28,  1997,  ADA  had  approximately  219  full-time  employees,
including 127 in engineering, 44 in sales, marketing and customer support, 25 in
operations and 23 in finance and  administration.  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.  The
Company's President and Chief Executive Officer, Mr. Peter Savage, the Company's
Vice President,  Systems Engineering,  Mr. Paul Hartmann, and the Company's Vice
President,  Customer Support,  Mr. Donald O'Connor,  have entered into severance
arrangements  with  the  Company.  No  other  member  of  the  Company's  senior
management  is  subject  to an  employment  arrangement  with the  Company.  The
Company's employees are not represented by any collective bargaining agreements,
and the Company has never experienced a work stoppage. The Company believes that
its employee relations are good.




RISKS AND UNCERTAINTIES

CONCENTRATION OF MAJOR CUSTOMERS;  TELEPHONE COMPANY QUALIFICATION REQUIREMENTS.
The market for the  Company's  products  currently  consists of the seven RBOCs,
other local telephone companies, CAPs and long distance telephone companies. The
Company's  marketing  efforts to date have focused on the RBOCs which  accounted
for 73% of the Company's revenue in 1996. Accordingly,  at present the Company's
customer  base is highly  concentrated  and there can be no  assurance  that its
customer base will become less concentrated.  Further,  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,  or a delay in deployment of the Company's
products could materially and adversely affect the Company's business, operating
results  and  financial  condition.  Prior to selling  products  to a  telephone
company,  a vendor must first  undergo a product  qualification  process for its
products with the telephone  company.  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, six of the
seven RBOCs have qualified and deployed the Company's T3AS products. Any failure
on the part of any of the RBOCs or other  telephone  companies to maintain their
qualification  of the Company's  T3AS  products,  failure of any of the RBOCs or
other telephone companies to deploy the Company's T3AS products,  or any attempt
by any of the  RBOCs  or  other  telephone  companies  to seek  out  alternative
suppliers  could  have a  material  adverse  effect on the  Company's  business,
operating results and financial condition.  BellSouth,  Ameritech,  Southwestern
Bell and U S West have entered into purchase  contracts with the Company.  Other
RBOCs,  independent  telephone companies,  and other telephone service providers
purchase the Company's  products under standard purchase orders.  Since the RBOC
contracts may be terminated at the convenience of the RBOC, the Company believes
that the purchase  contracts are not materially  different than purchasing under
purchase orders.  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,   telephone  company  work  force  reductions  and  staff
reassignments have in 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.

                                       13

<PAGE>


     HIGH  DEPENDENCE  ON SINGLE  PRODUCT  LINE.  The majority of the  Company's
revenue to date has been  derived from the sale of T3AS  products and  services.
The Company  expects that a majority of its revenue will  continue to be derived
from T3AS  products  and  services  in the near term.  However,  the  Company is
investing  in the  expansion  of its  product  lines  through  the  enhancement,
development and marketing of its NIU, CTS, PAAS, and OS products. Failure by the
Company to enhance either its existing T3AS products and services  including CTS
and PAAS.  or its NIU and OS products,  and 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.

     COMPETITION.  The Company  believes there are currently no competitors that
provide an  integrated  comprehensive  solution to  performance  monitoring  and
testing of the DS3  circuit  as does the  Company's  T3AS  system.  The  Company
believes the principal  competitive  factors in this market are conformance with
Bellcore and other industry transmission  standards and specifications;  product
features,  including price, performance and reliability;  technical support; and
the maintenance of close working  relationships with customers.  There can be no
assurance that the Company will compete  successfully in the future with respect
to these factors and others that may arise.  Although the Company  believes that
there are fewer than 10 current  competitors  that provide partial  solutions to
either performance monitoring or testing of the DS1 or DS0 circuits that make up
the DS3  circuit,  this market is fiercely  competitive.  Such  competitors  and
prospective competitors include a number of companies,  such as manufacturers of
DSI test and  monitoring  equipment,  manufacturers  of NIUs,  manufacturers  of
digital   cross-connect   test  and   performance   monitoring   equipment   and
manufacturers  of  large  transmission   equipment.   Many  of  these  companies
manufacture  products that are directly competitive with the Company's Low-Speed
Subsystems,  T3AS Centralized Test Systems and Remote Module,  and many of these
competitors have significantly greater technical, financial,  manufacturing, and
marketing  resources than the Company.  In addition,  the company  believes that
there are an  increasing  number of current  competitors  in the OS market  that
provide OS applications for testing,  surveillance,  performance  monitoring and
traffic management of telecommunications  functions. In each of the NIU, CTS and
OS markets, competition is expected to increase significantly in the future. For
instance,  the NIU market is fiercely competitive with respect to price, product
features, established suppliers, and conformance with industry standards, and in
the OS market,  improved  technologies  and tool sets have made the  barriers to
entry in this market  relatively small.  Additionally,  several of the Company's
competitors  have  long-established  relationships  with the  Company's  current
prospective  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.

     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
faces  significant  management  challenges  related  to the  integration  of the
operations,  products and  technologies  acquired as well as the  management  of
separate  geographic  locations.  In 1996,  the  Company  formed  two  strategic
business units:  the Network  Systems and Sensors  business unit and the Network
Management  business unit. The business units are synergistic with the evolution
of the Company from a single product line to multiple product lines. The Network
Systems and Sensors  business unit is built around the  Company's  T3AS products
and services  including CTS and PAAS, as well as the Remote Module product.  The
Network Management business unit focuses on OS products including TDC&E, FMS and
OS  design  services  all  acquired  through  acquisitions,  as  well as GTA and
Sectionalizer.  There can be no assurance that the Company will be successful in
managing its new business unit structure. The Company is currently transitioning
portions of the OS design service business to a product-oriented  business. This
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. 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 hiring sufficient
numbers of qualified  personnel to support the  expansion of the  business.  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 the
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, results of operations, and financial condition.

     MERGERS. Of the eight major TSPs currently involved in merger transactions,
six are customers of the Company.  Several of the mergers involve companies that
purchase network systems,  software 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 could have a material adverse
effect on the Company's business, operating results and financial condition.

                                       14

<PAGE>


     RAPID TECHNOLOGICAL  CHANGE AND DEPENDENCE ON NEW PRODUCTS.  The market for
the  Company's  products  is  characterized  by  rapid  technological  advances,
evolving  industry  standards,  changing  regulatory  environments,  changes  in
customer requirements,  and frequent new product introductions and enhancements.
The introduction of telephone network test and  performance-monitoring  products
involving superior technologies or the evolution of alternative  technologies or
new industry transmission  standards,  such as ATM, Frame Relay and SONET, 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 current products,  to develop and introduce new products
for the telephone network test and performance-monitoring market, the OS market,
and other markets, to address new industry  transmission  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  T3AS  products  do not  address  either  the SONET or SDH  transmission
standard.  The Company  intends to extend its current  products  and develop new
products to accommodate such new  transmission  standards,  as they evolve.  The
widespread  adoption  of SONET  and/or SDH as  industry  transmission  standards
before the Company is able to  successfully  develop a product  which  addresses
such  transmission  standards could adversely  affect the sale and deployment of
the Company's T3AS products. 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;  NEED TO MAKE ADVANCE PURCHASE
COMMITMENTS.  Certain  components used in the Company's T3AS products and Remote
Module  product,  including its VLSI ASICs and other  components,  are available
from a single source.  The Company has no 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  subassemblies.  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.  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.  To procure  adequate
supplies of certain  components,  the Company must make advance  commitments  to
purchase  relatively  large  quantities  of  such  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
incorporate such components in its products could have a material adverse effect
on the Company's business, operating results and financial condition.

     PRODUCT RECALL.  Producers of telecommunications network  equipment,  
including  test access and  performance  monitoring  systems 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 its customers.
The  Company's  systems are also required to interface in a complex and changing
environment with telecommunication network equipment made by numerous suppliers.
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

                                       15


<PAGE>

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.

     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.  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 regulatory rulings by federal
and state agencies on the Company's customers may adversely impact the Company's
business, operating results and financial condition.

     PROPRIETARY  TECHNOLOGY.  The Company  relies on a combination of technical
leadership,  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 customer's
needs. Currently,  the Company has nine U.S. patents granted and two U.S. patent
applications allowed. One of the granted patents relates to the Company's Remote
Module  product.   Additionally,  the  Company  has  nine  pending  U.S.  patent
applications and two international  (Patent Cooperation Treaty)  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. As part of its confidentiality procedures,
the Company generally enters into  non-disclosure  agreements with its employees
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 not aware
of  infringement  by its products or  technology  of the  proprietary  rights of
others.   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  against the Company could  materially and adversely affect
the Company's business, results of operations 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.

     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,

                                       16


<PAGE>


ITEM 2.  PROPERTIES

     The Company  currently  maintains its  headquarters in a leased facility in
San Diego, California,  which contains all development,  engineering,  assembly,
marketing and  administrative  functions,  in 38,987 square feet of space in one
building.  The lease expires in fiscal 1999. The Company also leases  additional
office facilities in Terre Haute, Indiana, and Vancouver, British Columbia, both
of which house product development and customer support operations.  The Company
leases  12,600 and 25,604  square feet of space in Terrre  Haute and  Vancouver,
respectively. The Terre Haute lease expires in September 1997, and the Vancouver
lease  expires  in  December  1999. The Terre Haute lease includes an option to
extend the lease term one year from the September 1997 expiration date.  The  
Company  believes  that  its  existing facilities will be adequate to meets its
needs through 1997.

ITEM 3.  LEGAL PROCEEDINGS

         None.

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

         None.
                                     PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

STOCK MARKET INFORMATION

Applied  Digital  Access' Common Stock is listed on the NASDAQ National Market
and is traded on the over the counter  market under the symbol "ADAX." The  
following table set forth the high and low sales prices the  Company's  common 
stock for the periods indicated.

<TABLE>
<CAPTION>

     1996                  High                  Low
     ----                  ----                  ---
<S>                        <C>                  <C>   
First Quarter              $17.00               $ 9.50
Second Quarter              19.00                 9.75
Third Quarter               11.75                 6.25
Fourth Quarter               8.75                 4.75

<CAPTION>
     1995                  High                  Low
     ----                  ----                  ---
<S>                        <C>                  <C>   
First Quarter              $30.50               $ 13.00
Second Quarter              16.75                 10.25
Third Quarter               17.50                 10.50
Fourth Quarter              15.00                 10.00
</TABLE>

There were 247 shareholders of record as of February 28, 1997.

DIVIDEND POLICY

Applied  Digital  Access has not  declared  or paid any cash  dividends  on it
Common Stock to date. The Company currently intends to retain all earnings, if
any, to fund the development and growth of its business and therefore does not
anticipate paying any cash dividends within the foreseeable future.

                                       17

<PAGE>

ITEM 6.  SELECTED FINANCIAL DATA

<TABLE>
<CAPTION>

(Dollars in thousands)                          1992           1993           1994           1995           1996
                                                ----           ----           ----           ----           ----

<S>                                         <C>           <C>             <C>             <C>            <C>      
Revenue                                     $  7,453      $  14,259       $  35,597       $ 20,470       $  24,422

Gross Profit                                   2,914          7,125          20,791         11,753          11,813

Operating Expenses:

Research and  development                      3,181          3,902           5,335          5,807           7,356
                                                                        
In process research and development
related to acquistions                           -              -               -              -             3,286
                                                                                       
Sales and marketing                            1,916          2,406           3,363          4,234           6,312
                                                                                  
General and administrative                     1,416          1,354           2,337          2,985           3,576
                                               -----          -----           -----          -----           -----
 
    Total operating expenses                   6,513          7,662          11,035         13,026          20,530
                                                                                   

Net income (loss)                             (3,621)          (619)         10,620            759           (7,120)
                                              -------          -----         ------            ---           -------
 
 
Net income (loss) per share                 $  (4.96)       $  (.75)        $   .88        $  .06              (.59)
                                            --------         -------         -------        ------              ---- 

Net income (loss) per share,                $  (.46)       $   (.07)        $   .88        $  .06              (.59)
supplementary (1)                           --------         -------         -------        ------              ---- 

Weighted average number of  shares and      
commom share equivalents (1)                    730             820          12,091        12,848            12,084

Weighted average number of shares and
common share equivalents, supplementary (1)   7,914           8,693          12,091        12,848            12,804

Working Capital                           $   3,082       $   2,251          26,081        36,728            31,229

Total assets                                  5,389           6,878          48,919        49,936            45,972

Long-term debt                                  431             117              82            49                33

</TABLE>
(1)    See Note 2 to the Financial Statements, a copy of which is attached
       hereto as Exhibit 13.1.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS

         "Management's  Discussion  and  Analysis  of  Financial  Condition  and
Results  of  Operations"  on  pages  14  through  17 of  the  Annual  Report  is
incorporated herein by reference.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         The  Financial  Statements  on pages  18  through  22 and the  Notes to
Financial   Statements  on  pages  23  through  29  of  the  Annual  Report  are
incorporated herein by reference.

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
         FINANCIAL DISCLOSURE

         Not applicable.
                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

          Identification   of  Directors.   The  information  under  the caption
"Election of  Directors,"  appearing  in the Proxy  Statement,  is  incorporated
herein by reference.

          Identification  of  Executive  Officers.   The  information  under the
headings "Executive Officers," appearing in the Proxy Statement, is incorporated
herein by reference.

          Compliance with Section 16(a) of the Exchange Act. Based solely upon a
review of Forms 3, 4 and 5 and  amendments  thereto  furnished to the Registrant
and upon  written  representations  of all  individuals  required  to file forms
pursuant to Section  16(a),  the  Registrant  knows of no such  individual  that
failed to file Forms 3, 4 and 5 on a timely basis during the last fiscal year.

ITEM 11.  EXECUTIVE COMPENSATION

          The information  under the headings  "Executive Compensation and Other
Information,"  appearing  in the  Proxy  Statement,  is  incorporated  herein by
reference.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

          The information under the headings "Principal Shareholders" and 
"Common Stock Ownership of  Management,"  appearing in the Proxy  Statement,  is
incorporated herein by reference.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

          The information under the heading "Certain Transactions," appearing in
the Proxy Statement, is incorporated herein by reference.

                                     PART IV


ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

     (a)                   1.   FINANCIAL STATEMENTS

          The following financial statements of the Company, included in the 
1996 Annual  Report to  Shareholders  for the year ended  December  31, 1996 are
incorporated  herein by reference as required under Item 8 of this annual report
on Form 10-K:


                                       18

<PAGE>

         Report of Independent Accountants

         Balance Sheets at December 31, 1995 and December 31, 1996

         Statements of Operations for the years ended December 31, 1994, 1995 
         and 1996

         Statements of Shareholders' Equity for the years ended December 31, 
         1994, 1995 and 1996

         Statements of Cash Flows for the years ended December 31, 1994, 1995 
         and 1996

         Notes to Consolidated Financial Statements

               2.   FINANCIAL STATEMENT SCHEDULES

         The  following  financial  statement  schedules are included in Item 14
         (d):

         Report of Independent Accountants
         Schedule II  -  Valuation and Qualifying Accounts

         All other  schedules  for  which  provision  is made in the  applicable
accounting  regulations  of the  Securities  and  Exchange  Commission  are  not
required under the related instructions or are inapplicable,  and therefore have
been omitted.

     (b)      REPORTS ON FORM 8-K

              No  reports on Form 8-K have been filed  during  the last  quarter
              of the period  covered by this report.

     (c)      EXHIBITS

      EXHIBIT                                                            PAGE
      NUMBER                                                             NUMBER
      ------                                                             ------
     2.1(6)    Asset Purchase Agreement between Applied Digital Access,      --
               Inc. and Applied Computing Devices, Inc. dated February 
               29, 1996

     2.2(8)    Asset Purchase Agreement between Applied Digital Access,      --
               Inc. and MPR Teltech, Ltd. dated July 16, 1996

     3.1(1)    Amended and Restated Articles of Incorporation (Exhibit 3.3). --

    +3.2(1)    Amended and Restated Bylaws of the Company as amended         --
               (Exhibit 3.4). Form of Written Consent of Holders of 
               Series A, Series B, Series C, Series -- 10.1(1) D and 
               Series E Preferred Stock to Conversion effective 
               immediately prior to the closing.

    10.1(1)    Registration Rights Agreement by and between the              --
               Company and certain shareholders of the Company,
               dated May 22, 1992 as amended pursuant to the Amendment
               to Registration Rights Agreement dated April 9, 1993.

    10.2(1)    Series A Preferred Stock Purchase Agreement by and            --
               between the Company and the purchasers identified on
               Exhibit A to the Agreement, dated August 17,
               1987 as amended and restated on December 24, 1987.

    10.3(1)    Series B Preferred Stock Purchase Agreement by and            --
               between the Company and the purchasers identified on
               Exhibit A to the Agreement, dated January 20, 1989.


                                       19

<PAGE>

      EXHIBIT                                                            PAGE
      NUMBER                                                             NUMBER
      ------                                                             ------

     10.4(1)   Modification Agreement and Consent by and between the         --
               Company and the holders of the Company's Series A
               Preferred Stock, dated January 20, 1989.

     10.5(1)   Supplemental Series B Preferred Stock Purchase                --
               Agreement by and between the Company and the
               Purchasers identified on Exhibit A to the Agreement, dated
               January 30, 1989.

     10.6(1)   Stock Purchase and Capital Contribution Agreement by          --
               and between the Company and the purchasers identified
               on Exhibit A to the Agreement, dated February 28, 1991.

     10.7(1)   Series D Preferred Stock Purchase Agreement by and            --
               between the Company and the purchasers identified on
               Exhibit A to the Agreement, dated March 13, 1991.

     10.8(1)   Capital Contribution Agreement by and between the             --
               Company and the persons identified on Exhibit A to
               the Agreement, dated March 13, 1991.

     10.9(1)   Series E Preferred Stock Purchase Agreement by and            --
               between the Company and the purchasers identified on
               Exhibit A to the Agreement, dated May 22, 1992, 
               as amended pursuant to the Amendment No. One to Series
               E Preferred Stock Purchase Agreement dated July 22, 1992
               and the Amendment to Series E Preferred Stock 
               Purchase Agreement dated April 9, 1993.

    10.10(1)   Modification Agreement and Consent by and between the         --
               Company and the holders of the Company's Series A 
               Preferred Stock, Series B Preferred Stock, Series 
               C Preferred Stock and Series D Preferred Stock, 
               dated May 22, 1992.

    10.11(1)   Standby Loan Facility Agreement by and between                --
               the Company and the purchasers identified on Exhibit A 
               to the Agreement, dated April 9, 1993, as amended 
               pursuant to an Amendment to Standby Loan Facility Agreement
               dated April 9, 1993. Related form of Note and form of Warrant.

    10.12(1)   Lease for the Company's facilities at 9855 Scranton           --
               Road, dated June 15, 1993.

    10.13(1)   Master Equipment Lease Agreement dated July 8, 1988           --
               by and between the Company and Comdisco, Inc., as amended.

    10.14(1)   Warrant Agreement, dated July 8, 1988 by and                  --
               between the Company and Comdisco, Inc., as amended.

    10.15(1)   Warrant Agreement dated August 15, 1991 by and                --
               between the Company and Comdisco, Inc.

    10.16(1)   Agreement dated July 1, 1991 by and between the               --
               Company and BellSouth Services Incorporated, as amended 
               (with certain confidential portions omitted).

    10.17(1)   Manufacturing Agreement dated April 30, 1993 by and           --
               between the Company and Comptronix Corporation.

    10.18(1)   Manufacturing Agreement dated November 19, 1993               --
               by and between the Company and Arrow Electronics, 
               Inc. (with certain confidential portions omitted).

                                       20

<PAGE>

      EXHIBIT                                                            PAGE
      NUMBER                                                             NUMBER
      ------                                                             ------

    10.19(1)   Software License Agreement dated January 16, 1992 by          --
               and between the Company and GCOM (with certain 
               confidential portions omitted).

    10.20(1)   Master Agreement for Operations Systems Modifications         --
               for the Integration of Network Elements, dated June 17,
               1991 by and between the Company and Bellcore, as amended.

    10.21(1)   Addendum #1 to Master Agreement for Operations Systems        --
               Modifications for the Integration of Network
               Elements, dated June 17, 1991 by and between the
               Company and Bellcore dated July 10, 1991.

    10.22(1)   Addendum #2 to Master Agreement for Operations Systems        --
               Modifications for the Integration of Network
               Elements, dated June 17, 1991 by and between the
               Company and Bellcore dated November 19, 1993.

    10.23(1)   Addendum #3 to Master Agreement for Operations Systems        --
               Modification for the Integration of Network Elements 
               dated June 17, 1991 by and between the Company and 
               Bellcore dated December 27, 1993.

    10.24(1)   Sales Representative Agreement dated October 11, 1991         --
               by and between the Company and Taiwan Victory Technology 
               Corporation (with certain confidential portions omitted).

   +10.25(1)   The Company's 1988 Stock Option Plan, as amended.             --

   +10.26(1)   The Company's Restricted Stock Purchase Plan, as amended.     --

   +10.27(1)   1988 Stock Option Plan Form of Incentive Stock                --
               Option Agreement.

   +10.28(1)   1988 Stock Option Plan Form of Non-Qualified Stock            --
               Option Agreement.

   +10.29(1)   1988 Stock Option Plan Form of Stock Purchase Agreement.      --

   10.30(1)    Stock Option Agreement dated May 22, 1991, by and             --
               between the Company and the Boundary Fund.

    10.31(1)   Stock Purchase Agreement dated September 30,                  --
               1991, by and between the Company and the Boundary Fund.

   +10.32(1)   Stock Option Agreement dated May 22, 1991, by and between     --
               the Company and Richard E. Pospisil.

   +10.33(1)   Stock Purchase Agreement dated December 23, 1993,             --
               by and between the Company and Richard E. Pospisil.

   +10.34(1)   Consulting Services Agreement dated July 11, 1993             --
               by and between the Company and Thomas L. Engdahl.

   +10.35(1)   Settlement Agreement and General Release dated                --
               June 11, 1993 by and between the Company and Thomas
               L. Engdahl, as amended.

   +10.36(1)   Stock Pledge Agreement dated August 10, 1993 by               --
               and between the Company and  Thomas L. Engdahl.

   +10.37(1)   Promissory Note Secured by Stock Pledge Agreement             --
               dated August 10, 1993 executed by Thomas L. Engdahl 
               in favor of the Company.

   +10.38(1)   Severance Agreement dated November 27, 1990 by                --
               and between the Company and  Peter P. Savage.


                                       21


<PAGE>


      EXHIBIT                                                            PAGE
      NUMBER                                                             NUMBER
      ------                                                             ------

   +10.39(1)   Promissory Note dated June 12, 1992 executed                  --
               by Peter Savage in favor of the Company.

   +10.40(1)   Severance Agreement dated June 20, 1988 by and                --
               between the Company and Paul  R. Hartmann.

   +10.41(1)   Management Team Incentive Compensation Plan.                  --

   +10.42(1)   The Company's 1994 Stock Option/Stock Issuance Plan.          --

   +10.43(1)   1994 Stock Option/Stock Issuance Plan Form                    --
               of Stock Option Agreement.

   +10.44(1)   1994 Stock Option/Stock Issuance Plan Form of                 --
               Stock Issuance Agreement.

   +10.45(1)   1994 Employee Stock Purchase Plan.                            --

   +10.46(1)   1994 Stock Purchase Plan Form of Stock Purchase Agreement.    --

    10.47(1)   Form of Employee Proprietary Information Agreement.           --
    
   +10.48(1)   Form of Indemnification Agreements between the Company        --
               and each of its directors.

   +10.49(1)   Form of Indemnification Agreements between the Company        --
               and each of its officers.

   10.50(1)    Binary Software License Agreement dated March 7,              --
               1989 between the Company and Software Components Group, 
               Inc., as amended.

   10.51(2)    General Purchase Agreement dated April 11, 1994               --
               between the Company and U.S. West Communications, Inc. 
               (with certain confidential portions omitted)
               (Exhibit 10.1).

   10.52(3)    Reinstatement Agreement dated September 22, 1994              --
               between the Company and BellSouth Telecommunications 
               Incorporated (with certain confidential
               portions omitted) (Exhibit 10.2).

   10.53(3)    Purchase Agreement with Telecommunications Products           --
               and Related Services  between the Company and Ameritech
               Services, Inc. (with certain confidential portions
               omitted) (Exhibit 10.3).

   10.54(4)    First Amendment to Office Lease dated September 23,           --
               1994 between the Company and Sorrento Tech Associates.

  +10.55(4)    Settlement Agreement and General Release dated                --
               January 17, 1995 between the Company and Charles H. Divine.

   10.56(5)    Purchase Agreement for Telecommunications Products            --
               and Related Services between Southwestern Bell 
               Telephone Company and Applied Digital Access,
               Inc., dated September 8, 1995 (with certain 
               confidential portions omitted) (Exhibit 10.1).

  +10.57(7)    Apllied Digital Access 1994 Stock Option/Stock                --
               Issuance Plan, as amended. 

  +10.58(7)    Applied Digital Access 1994 Employee Stock                    --
               Purchase Plan, as amended 

  +10.59(7)    Applied Digital Access 1996 Non-Qualified Option Plan         --


                                       22


<PAGE>


     EXHIBIT                                                             PAGE
      NUMBER                                                             NUMBER
      ------                                                             ------

   10.60(9)    Master Agreement between Northern Telcom, Ltd.                --
               and Applied Digital Access, Inc. dated July 16, 1996

   10.61(9)    Stock Purchase Agreement between Applied Digital              --
               Access, Inc. and MPR Teltech, Ltd. dated July 16, 1996.

   10.62(9)    License Agreement between Northern Telcom, Ltd.               --
               and Applied Digital Access, Inc.

   10.63(9)    Second Amendment to Lease between Sorrento                    --
               Tech Associates and Applied Digital Access, Inc.
               dated August 8, 1996

   10.64(9)    Lease Agreement between Rose Hulman Institute of              --
               Technology, through its authorized leaseing agent,
               Ragle and Company, and Applied Digital Access, Inc.
               dated September 15, 1996.

   10.65(9)    Agreement for Extension of Term, Amendement No.               --
               2 to General Purchasing Agreement between US 
               WEST Communications, Inc. and Applied Digital 
               Access, Inc. dated August 15, 1996

      10.66    Sublease agreement between Applied Digital Access,            --
               Inc. and ENOVA Corporation dated December 9, 1996

      10.67    First Amendment to Sublease between  Applied                  --
               Digital Access and ENOVA Corporation dated January 24, 1997

      10.68    Agreement for Extension of Term, Amendement No. 3 to          --
               General Purchasing Agreement between US WEST 
               Communications, Inc. and Applied Digital Access,
               Inc. dated January 30, 1997

      10.69    Office Lease Agreement between 2725321 Canada Inc.            --
               and Applied Digital Access - Canada, Inc. 
               dated January 1, 1997.

       11.1    Statement regarding computation of earnings per share.

       13.1    Applied Digital Access, Inc., 1996 Annual Report to Shareholders.

       23.1    Consent of Coopers & Lybrand L.L.P.

       24.1    Power of Attorney. (See page 25).

       27.1    Financial Data Schedule

         +        Management contract or compensatory plan.

       (1)     Incorporated by reference to the Company's  Registration 
               Statement on Form S-1 (No. 33-75258), as amended.

       (2)     Incorporated by reference to the Company's  Quarterly Report on
               Form 10-Q for the quarter ended March 31, 1994 
               (File No. 0-23698).

       (3)     Incorporated by reference to the Company's  Quarterly Report on
               Form 10-Q for the quarter ended September 30, 1994 
               (File No. 0-23698).

       (4)     Incorporated by reference to the Company's Annual Report
               on Form 10-K for the fiscal year ended December 31, 1995
               (File No. 0-23698).

       (5)      Incorporated by reference to the Company's  Quarterly Report
                on Form 10-Q for the quarter ended September 30, 1995 
                (File No. 0-23698).

       (6)      Incorporated by reference to the Company's Current Report on
                Form 8-K dated March 15, 1996 (File No. 0-23698).

       (7)      Incorporated by reference to the Company's  Registration 
                Statement on Form S-8 (No. 333-08297), as amended

       (8)      Incorporated by reference to the Company's Current Report on 
                Form 8-K dated July 31, 1996 (File No. 0-23698).


                                       23



<PAGE>

       (9)     Incorporated by reference to the Company's  Quarterly Report on 
               Form 10-Q for the quarter ended September 30, 1996 
               (File No. 0-23698).


Supplemental Information

     Copies of the  Registrant's  Proxy  Statement  for the  Annual  Meeting  of
shareholders  to be held May 20, 1997 and copies of the form of proxy to be used
for such Annual Meeting were furnished to the Commission  prior to the time they
were distributed to the shareholders.



















                                       24

<PAGE>


                                   SIGNATURES

         Pursuant to the  requirements  of Section 13 or 15(d) of the Securities
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:  March 29, 1997                           By:      /s/ Peter P. Savage
                                                      ------------------------
                                                             Peter P. Savage
                                                             President and 
                                                             Chief Executive
                                                             Officer

<PAGE>


                                POWER OF ATTORNEY

         Know  all men by these  presents,  that  each  person  whose  signature
appears below constitutes and appoints Peter P. Savage or James L. Keefe, his or
her attorney-in-fact,  with power of substitution in any and all capacities,  to
sign any  amendments  to this Annual  Report on Form 10-K,  and to file the same
with exhibits  thereto,  and other documents in connection  therewith,  with the
Securities and Exchange Commission, hereby ratifying and confirming all that the
attorney-in-fact  or his or her substitute or substitutes  may do or cause to be
done by virtue hereof.

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
this  Report has been  signed  below by the  following  persons on behalf of the
Registrant in the capacities and on the dates indicated.

SIGNATURE                    TITLE                                   DATE
- ---------                    -----                                   ----

/s/ Peter P. Savage              President, Chief Executive       March 29, 1997
- ---------------------
  (Peter P. Savage)              Officer and Director
                                 (Principal Executive
                                 Officer)

/s/ James L. Keefe               Vice President, Finance and     March 29, 1997
- ---------------------
  (James L. Keefe)               Administration, Secretary,
                                 Chief Financial Officer
                                 (Principal Financial and
                                 Accounting Officer)

/s/ Kenneth E. Olson             Director                        March 29, 1997
- ----------------------
  (Kenneth E. Olson)


/s/ Christopher B. Paisley        Director                       March 29, 1997
- ---------------------------
  (Christopher B. Paisley)


/s/ Edward F. Tuck                Director                       March 29, 1997
- -----------------------
  (Edward F. Tuck)

                                       25




<PAGE>



                                    SUBLEASE

     This  Sublease is entered into by and between  APPLIED  DIGITAL  ACCESS,  a
California  corporation,   Sublessor,   and  ENOVA  CORPORATION,   a  California
corporation,  Sublessee, under that certain Lease dated June, 1993, entered into
by Sorrento Tech Associates,  a California limited  partnership,  as Lessor, and
Sublessor  under this  Sublease  as Lessee,  as  amended by that  certain  First
Amendment to Lease dated as of September  23,  1994,  and as further  amended by
that certain Second Amendment to Lease dated as of August 8, 1996. A copy of the
Lease,  First  Amendment to Lease and Second  Amendment  to Lease,  collectively
hereinafter known as the Master Lease, are attached hereto as Exhibit "A."

1.       INCORPORATION OF AND ASSUMPTION
         OF MASTER LEASE OBLIGATIONS

Except as specifically provided in this Sublease to the contrary,  this Sublease
is subject  to all of the terms and  conditions  of the Master  Lease in Exhibit
"A." Except as specifically provided in this Sublease to the contrary, Sublessee
agrees to assume and perform the  obligations  of  Sublessor  and Lessee in said
Master Lease,  but only to the extent said  obligations  arise from or relate to
the Premises subleased pursuant to this Sublease.  Sublessee shall not commit or
permit to be committed on the Premises any act or omission  which shall  violate
any term or condition of the Master Lease.  In the event of the  termination  of
Sublessor's interest as Lessee under the Master Lease, for any reason, then this
Sublease  shall  terminate  coincidentally  therewith  without any  liability of
Sublessor  to  Sublessee,  subject  however to  Lessor's  agreement  to grant to
Sublessee  the quiet  enjoyment  of the  Premises  subleased  set forth below in
Lessor's Consent.

Sublessor and Sublessee  agree that  Sublessee  does not assume any  obligations
with regard to the following sections of the Master Lease:

Lease

2.5      Rentable Area Defined
2.6      Building Rentable Area
5        Additional Charges for Expenses
6.2      Security Deposit
7        Construction [Tenant Improvements]
16.2     Tenant's   Liability   Insurance   (Sublessee  will  provide  evidence
         of self-insurance)
16.3     Form of  Policies  (Sublessee  will  provide  evidence  of
         self-insurance)  
18.6     Assumption of  Obligations  
22.4     Payment of Sums Due 
30.2     Financial Statements 30.10 Holding Over

First Amendment

3.          Security Deposit
5.          Brokers Commission



                                        1



<PAGE>


Second Amendment

3.            Acceptance of Expansion Area
6.            Security Deposit
8.            Broker Commissions

2. PREMISES

Sublessor  leases to Sublessee and Sublessee  hires from Sublessor the following
described  Premises  together  with the  appurtenances  described  in the Master
Lease,  situated  in the  City of San  Diego,  County  of San  Diego,  State  of
California and described as:

9855 Scranton Road, Suite 100, approximately 23,381 square feet of Building 5 of
the San  Diego  Tech  Center  as  shown  on  Exhibit  "B"  attached  hereto  and
incorporated by this reference.

3. RENTAL

Sublessee  shall pay to  Sublessor  as rent for the  Premises  in advance on the
first day of each calendar month of the term of this Sublease without deduction,
offset, prior notice or demand, in lawful money of the United States, the sum of
Twenty-Seven   Thousand  One  Hundred   Twenty-One   Dollars   Ninety-Six  Cents
($27,121.96).  If the commencement date is not the first day of the month, or if
the  Sublessee  termination  date is not the last day of the  month,  a prorated
monthly  installment  shall be paid at the then current rate for the  fractional
month during which the Sublease commences and/or terminates.

In the event  Sublessee  continues to occupy the space after  September 1, 1997,
the monthly rental rate will be $28,291.01.  Sublessee  shall be responsible for
their separately metered electricity.

By executing this Sublease,  Sublessor hereby acknowledges receipt of $27,121.96
as the first month's rental.

4. TERM

     (a)  The  term  of  this  Sublease  shall  be for a  period  of six  months
commencing on January 1, 1997, and ending on June 30, 1997.

     (b) After  June 30,  1997  Sublessee  shall  have the  right to occupy  the
Premises on a month to month basis through December 31,1997,  and shall have the
right to  terminate  anytime  during that  period with thirty (30) days  written
notice.

     (c) In the event Sublessor is unable to deliver  possession of the Premises
at the  commencement  of the term,  Sublessor shall not be liable for any damage
caused  thereby,  and  this  Sublease  shall be  voidable  at  Sublessee's  sole
discretion. If the sublease is voided by Sublessee,



                                        2

<PAGE>


Sublessee  shall not be liable for any rent due under the terms of the Sublease.
If  Sublessee,   with  Sublessor's  consent,   takes  possession  prior  to  the
commencement of the term,  Sublessee shall do so subject to all of the covenants
and conditions hereof except for the obligation to pay rent for the period prior
to and ending upon the commencement of the term as stated herein.

5.    USE

Sublessee  shall  use the  Premises  for  general  office  uses and for no other
purpose without the prior written consent of Sublessor,  which consent shall not
be unreasonably withheld.

6.    TENANT IMPROVEMENTS

Sublessee  shall accept the  premises in "as-is"  condition,  broom  clean.  Any
improvements  must be approved by Landlord and  Sublessor  per Section 10 of the
Master Lease.

7.    NOTICES

All notices or demands of any kind  required or desired to be given by Sublessor
or  Sublessee  thereunder  shall be in  writing  and shall be  deemed  delivered
forty-eight (48)hours after depositing the notice or demand in the United States
mail,  certified or registered,  postage prepaid,  addressed to the Sublessor or
Sublessee  respectively at the addresses set forth after their signatures at the
end of this  Sublease.  All rent and other payments due under the Sublease shall
be made by Sublessee to Sublessor at the same address.

Dated:  12/11/96                                  Dated:  12/9/96

             Sublessor:                           Sublessee:
             Applied Digital Access,              Enova Corporation,
             a California corporation             a California corporation


By:     /s/  Peter Savage                  By:   /s/  David R. Kuzma
             President                           Senior Vice President
             9855 Scranton Road                  101 Ash Street
             San Diego,  CA 92121                San Diego,  CA 92101


                                LESSOR'S CONSENT

The  undersigned,  Lessor under the Master Lease attached as Exhibit "A," hereby
consents to the  subletting  of the Premises  described  herein on the terms and
conditions  contained in this  Sublease.  This consent  shall apply only to this
Sublease and shall not be deemed to be a consent to any other  Sublease.  Lessor
hereby provides to Sublessee the right to remain in the subleased


                                        3


<PAGE>

premises  under the same terms and  conditions set forth in this Sublease in the
event of Sublessor's default.

Dated: 12/12/96                            Lessor: Sorrento Tech Associates,
                                           a California limited partnership

                                           By: Barnes Canyon RPF Realty Corp.
                                           a Connecticut corporation,
                                           General Partner

                                           By: /s/ Mark S. Knapp
                                           Mark S. Knapp
                                           Vice President


<PAGE>



                           FIRST AMENDMENT TO SUBLEASE

     THIS FIRST AMENDMENT TO SUBLEASE  ("Amendment") is made as of this 24th day
of January 1997, by and between APPLIED DIGITAL ACCESS, a California corporation
("Sublessor"),  and ENOVA CORPORATION,  a California corporation  ("Sublessee"),
with  reference  to that  certain  Sublease  being  entered  into by and between
Sublessor  and  Sublessee  concurrently  herewith  and  executed by Sublessee on
December 9, 1996  ("Sublease").  For the  purposes of this  Amendment,  the term
"Sublease"  shall mean,  collectively,  the Sublease and this  Amendment and the
capitalized  terms used herein shall have the  meanings  ascribed to them in the
Sublease unless otherwise indicated.  Except as modified as provided herein, the
Sublease shall remain in full force and effect.  To the extent that there is any
conflict  between  this  Amendment  and the  Sublease,  the  provisions  of this
Amendment shall prevail.

     NOW, THEREFORE, in consideration of covenants,  terms and conditions herein
set forth and for other good, valuable and sufficient consideration,  receipt of
which is hereby acknowledged, the parties hereto agree as follows:

     1. MASTER  LANDLORD'S  OBLIGATIONS.  It shall be the  obligation  of Master
Landlord to (i) provide or cause to be provided  all  services and repairs to be
provided by Landlord under the terms of the Master Lease and (ii) to satisfy all
obligations and covenants of Master Landlord made in the Master Lease. Sublessee
acknowledges that Sublessor's obligation to perform services, provide utilities,
make repairs and carry  insurance shall be satisfied only to the extent that the
Master  Landlord  under the  Master  Lease  satisfies  those  same  obligations;
provided, however, Sublessor, upon written notice by Sublessee, shall diligently
attempt to enforce all obligations of Master Landlord under the Master Lease.

     2. LATE PAYMENT  CHARGES AND INTEREST.  Any payment of rent or other amount
from Sublessee to Sublessor under the Sublease which is not paid within 10 (ten)
days from the date due shall  accrue  interest  from the date due until the date
paid at a rate equal to ten percent (10%) per year; provided, however, that if a
court of competent  jurisdiction  determines  the above rate exceeds the highest
lawful rate of  interest,  then at the  maximum  rate  permitted  by law. If any
installment of rent for the subleased Premises is not paid promptly on the first
of the month,  or otherwise  when due,  Sublessee  shall pay to Sublessor a late
payment  charge  equal to five  percent  (5%) of the  amount of such  delinquent
payment of rent, in addition to the installment of rent then owing. This Section
3 shall not relieve Sublessee of Sublessee's  obligation to pay any amount owing
hereunder at the time and in the manner provided.

     3. USE -- COMPLIANCE WITH LAWS. At its own expense, Sublessee will procure,
maintain  in effect  and  comply  with all  conditions  of any and all  permits,
licenses  and  other   governmental  and  regulatory   approvals   required  for
Sublessee's use of the Subleased Premises.

     4. ASSIGNMENT AND SUBLETTING.  Sublessee shall not sell, assign,  encumber,
sublease or otherwise  transfer by operation of law or otherwise  the  subleased
Premises or the Sublease without Sublessor's consent,  which consent, based upon
the short term  nature of this  Sublease,  may be  withheld  or  conditioned  by
Sublessor  in its sole and  arbitrary  discretion.  Any such  sale,  assignment,
encumbrance,  sublease  or  other  transfer  in  violation  of the  terns of the
Sublease shall be void and shall be of no force or effect.

     5.  INDEMNITY.  Except to the extent  caused by the  negligence  or willful
misconduct  of the  Master  Landlord,  the  "Related  Parties"  (as  defined  in
Paragraph 22.2 of the Master Lease), and/or Sublessor, Sublessee will indemnify,
defend (by counsel  reasonably  acceptable  to  Sublessor  and which may include
in-house  attorneys),  protect and hold Sublessor  harmless from and against any
and all  liabilities,  claims,  demands,  losses,  damages,  costs and  expenses
(including  attorneys'  fees) arising out of or relating to those items referred
to in Section  22.2 (a)  through  (g) of the Master  Lease or arising  out of or
related  to  any  breach  or  default  under  the  Master  Lease  caused  by the
Sublessee's breach or default under the sub-lease.



<PAGE>




     6. BROKERAGE COMMISSION. Each party warrants to the other that there are no
brokerage  commissions or fees payable in connection with the Sublease except to
Colliers Iliff Thorn and Sentre Partners. Each party also agrees that payment of
the  brokerage  commissions  will be made by the  Sublessor.  Each party further
agrees to indemnify and hold the other party harmless,  from any cost, liability
and expense  (including  attorneys' fees) which the other party may incur as the
result of any claim for a fee or  commission  by any  broker or finder  claiming
through the indemnifying patty in connection with this Sublease.

     7.  ATTORNEYS'  FEES.  In the event  either party shall bring any action or
proceeding  for  damages  or for an  alleged  breach  of  any  provision  of the
Sublease,  to recover  rents or to enforce,  protect or  establish  any right or
remedy under the  Sublease,  the  prevailing  party shall be entitled to recover
reasonable attorneys' fees and court costs as part of such action or proceeding.

     IN WITNESS WHEREOF, the parties hereto have executed one (1) or more copies
of this Sublease, effective as of the last date written below.

"SUBLESSOR"                                   "SUBLESSEE"

APPLIED DIGITAL ACCESS,                    ENOVA CORPORATION,
a California corporation                   a California corporation

/S/ JAMES KEEFE                            /S/ DAVID R. KUZMA
James Keefe, Chief Financial Officer       David R. Kuzma, Senior Vice President




ACCEPTED AND AGREED TO:


"LANDLORD"

SORRENTO TECH ASSOCIATES,
a California limited partnership

      By: Barnes Canyon RPF Realty Corp.
          a Connecticut corporation,
          General Partner

By: /S/ MARK S. KNAPP
          Mark S. Knapp
          Vice Presiden




<PAGE>

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

                                      LEASE




BETWEEN:

                               2725321 CANADA INC.

                                                      LANDLORD

AND:

                      APPLIED DIGITAL ACCESS - CANADA, INC.

                                                      TENANT



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

                            IMPERIAL SQUARE LAKE CITY

                            BURNABY, BRITISH COLUMBIA

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




                           8630 - 8654 Commerce Court
                            Burnaby, British Columbia



<PAGE>

                                                      AGREEMENT NO. RGDCR45709

                         AGREEMENT FOR EXTENSION OF TERM
                                (AMENDMENT NO. 3)

This  Agreement  for  Extension  of Term is entered into by and between U S WEST
Business Resources,  Inc., a Colorado corporation,  with offices for transaction
of business located at 188 Inverness Drive West,  Englewood,  Colorado 80112, as
agent for U S WEST Communications, Inc. ("Customer") and Applied Digital Access,
Inc., with offices for transaction of business located at 9855 Scranton Road San
Diego, California 92121 ("Supplier").

                                    RECITALS

Customer and  Supplier  entered  into that  certain  agreement  styled " General
Purchasing  Agreement,"  dated  February  15,1994,  as amended by Amendment No.1
dated  February   1,1996,   and  Amendment  No.  2  dated  August  17,1996  (the
"Agreement");

The term of the Agreement  will  automatically  expire on February 16, 1997 (the
"Expiration  Date");  and Customer  and Supplier  wish to extend the term of the
Agreement beyond the Expiration Date under the terms and conditions hereof.

                                    AGREEMENT

In consideration  of mutual promises and advantages to the parties,  the parties
incorporate  by reference  and agree to the  accuracy of the above  recitals and
further agree that the Agreement  shall not expire on the  Expiration  Date, but
shall  automatically renew for an additional four (4) month period commencing on
February  17,1997,  and will  automatically  expire on June 16, 1997.  All other
terms and conditions of the Agreement remain unchanged and shall all continue in
full force and effect.

The term  "Customer" as used herein may be applicable to one or more parties and
the  singular  shall  include the plural.  If there shall be more than one party
referred to as Customer herein,  then their  obligations  shall be several,  not
joint.

The parties  intending to be legally  bound have  executed  this  Agreement  for
Extension of Term as of the dates set forth below in multiple  counterparts each
of which is deemed an original but all of which  together  shall  constitute one
and the same instrument.


U S WEST BUSINESS RESOURCES, INC.,             APPLIED DIGITAL ACCESS, INC.
AS AGENT FOR U S WEST COMMUNICATIONS, INC.

 By /s/ Peggy J. Berggren                       By /s/ James L. Keefe
- -------------------------                      ----------------------
 (Authorized Signature)                         (Authorized Signature)

Peggy J. Berggren                              James L. Keefe
- -----------------                              ---------------
(Print or Type Name or Signatory)              (Print or Type Name or Signatory)

Contract Agent                                 Chief Financial Officer
- --------------                                 ----------------------
(Title)                                        (Title)

January 30,1997                                January 30,1997
- ---------------                                -----------------
(Execution Date)                               (Execution Date)

                                        1

       CONFIDENTIAL. DISCLOSURE AND DISTRIBUTE SOLELY TO THOSE INDIVIDUALS
                            WHO HAVE A NEED TO KNOW.


<PAGE>

                            IMPERIAL SQUARE LAKE CITY

                            BURNABY, BRITISH COLUMBIA

                                      LEASE


THIS  INDENTURE  made as of January 1, 1997  pursuant to the LAND  TRANSFER FORM
ACT, PART 2


BETWEEN:

            2725321 CANADA INC., c/o PPM Real Estate Managers (Canada) Limited,
            440 - 1090 West Georgia Street, Vancouver, British Columbia, V6E 3V7

            (the "LANDLORD")
                                                              OF THE FIRST PART

AND:

            APPLIED DIGITAL ACCESS - CANADA,  INC., 9855 Scranton
            Road, San Diego, California, U.S.A., 92121

            (the "TENANT")
                                                             OF THE SECOND PART




                                    ARTICLE 1

                         DEFINITIONS AND INTERPRETATION

DEFINITIONS

1.1       The parties agree that the following words shall have the meanings set
forth below and used in this Lease.

         ADDITIONAL RENT means all amounts payable by the Tenant hereunder 
         excluding Basic Rent;

         AGREEMENT  TO LEASE means the  agreement  between  the  parties  hereto
         pursuant to which they have entered into this Lease;

         AREA OF THE DEMISED  PREMISES means as of the date hereof the number of
         square  feet set out in  Schedule  "A" hereto  subject to  revision  in
         accordance with such Schedule;

         BASIC RENT means the fixed annual rental payable pursuant to paragraph 
         3.1 hereof;

<PAGE>


         BUILDING means the building situate upon the Lands within which the 
         Demised Premises are located;

         COMMENCEMENT DATE means the date on which the Term commences, as set 
         out in paragraph 2.1;

         COMMON AREAS AND FACILITIES means those portions of the Development and
         the facilities therein or thereon from time to time not occupied by the
         Tenant  or other  tenants  as their  exclusive  premises  or  otherwise
         designated  by the  Landlord  as being for the benefit of or for use by
         the Tenant in common with others  entitled to the use or benefit of the
         same;

         DEMISED PREMISES means those premises described in Schedule "A" 
         attached hereto;

         DEVELOPMENT means the Lands and the Project;

         GST means the Goods and Services Tax contained in Part IX of the EXCISE
         TAX ACT,  S.C.  1990,  or any similar tax in  substitution  therefor or
         addition thereto;

         LANDS  means  those  certain  parcels or tracts of land  located in the
         Municipality of Burnaby, in the Province of British Columbia,  and more
         particularly described in Schedule "B" attached hereto;

         OPERATING COSTS means an amount equivalent to the total amount (without
         duplication)  paid or  payable  whether  by the  Landlord  or others on
         behalf of the Landlord for  managing,  operating  and  maintaining  the
         Development including all of the component parts thereof such as are in
         keeping  with  maintaining  the  standard of a first  class  industrial
         complex including without limiting the generality of the foregoing, all
         repairs and  replacements  required  for such  maintenance,  other than
         repairs to and  replacements of the structure of the Building and other
         buildings on the Project,  the costs of providing  electricity,  water,
         gas,  fuel and other  services  and  utilities  (including  heating and
         air-conditioning) not otherwise paid by the tenants of the Project, the
         costs of painting interior areas not normally rented to tenants and the
         costs of painting and otherwise maintaining the outside of the Building
         (including  the roof  thereof)  and all other  buildings on the Project
         (other than those parts for which the Tenant is responsible), the costs
         of  maintaining  roadways and parking areas lying in or adjacent to the
         Project, snow removal, landscape maintenance,  refuse removal and other
         costs in  connection  with the  maintenance  of the  Common  Areas  and
         Facilities, sprinkler protection, fire, casualty, liability, rental and
         other insurance costs (including  self-insurance premiums not in excess
         of normal  insurance  costs),  security  protection,  the amount of all
         salaries, wages, fringe benefits and other employment costs or payments
         made paid to employees  engaged in the  maintenance or operation of the
         Project,  amounts paid to independent contractors for or in relation to
         any services in connection with such maintenance or operation, the cost
         of direct  supervision and of management and other indirect expenses to
         the extent  allocable to the  maintenance and operation of the Project,
         the reasonable rental value of and costs associated with


                                        2

<PAGE>


          (having regard to the rentals prevailing from time to time for similar
          space)  space  utilized  by the  Landlord or its  property  manager in
          connection  with  the  management,  operation  or  maintenance  of the
          Project  and all other  expenses  paid or payable by the  Landlord  in
          connection  with  the  operation  of the  Development  and  all of the
          component parts thereof together with a fee for the administration and
          management  of the  Project  equal  to the  actual  cost  paid  by the
          Landlord to a third party to administer  and manage the Project (which
          shall be a commercially reasonable fee, having regard to the nature of
          the management  services performed and the operation of the Project as
          a first class  industrial  complex) or, if the Landlord itself manages
          the Project,  a fee equal to the amount the Landlord might  reasonably
          pay to a third  party for the  administration  and  management  of the
          Project,  but  Operating  Costs shall not include  interest on debt or
          capital  retirement of debt or any amounts directly  chargeable by the
          Landlord to any tenant or tenants as otherwise  provided  herein.  For
          greater  certainty,  Operating  Costs  shall not  include  the cost of
          structural  and roof repairs or  replacements  (other than relating to
          the roof membrane,  asphalt or  insulation,  which will be included in
          Operating Costs).

          If the  Landlord  sells  100% of a legally  subdivided  portion of the
          Development,  as of the date of sale,  the  Operating  Costs  shall be
          determined  on  the  basis  of  the  legally   subdivided  portion  of
          Development retained by the Landlord;

          PROJECT means the improvements constructed or to be constructed on the
          Lands from time to time, including without limitation, the Building;

          PROPORTIONATE SHARE means the fraction,  the numerator of which is the
          Area of the  Demised  Premises  and the  denominator  of  which is the
          aggregate  area in square feet of all rentable  premises  from time to
          time physically  existing in the Project,  whether  actually rented or
          not, including the Demised Premises;

          RENT means Basic Rent,  Additional  Rent and all other amounts payable
          to the Landlord hereunder;

          TAXES means an amount equal to all taxes,  rates,  duties,  levies and
          assessments whatsoever, whether municipal,  provincial,  parliamentary
          or otherwise,  levied,  imposed or assessed  against the Lands and the
          Project or upon the Landlord on account thereof, or from time to time,
          levied,   imposed  or  assessed  for  education,   schools  and  local
          improvements  and  including  all costs and  expenses  incurred by the
          Landlord in good faith in contesting,  resisting or appealing any such
          taxes, rates,  duties,  levies or assessments,  but excluding Tenant's
          Taxes and  excluding  income or  profits  taxes upon the income of the
          Landlord  to the  extent  that such  taxes  are not  levied in lieu of
          taxes,  rates,  duties,  levies and assessments  against the Lands and
          Project or upon the Landlord on account thereof;

          TENANT'S TAXES means without  limitation all taxes,  licences,  rates,
          duties  and  assessments  imposed  or levied by  lawful  authority  in
          respect of the use or occupancy of the Demised  Premises by the Tenant
          relating to or in respect of personal property in the Demised Premises
          or the Building or the Project and all other business and trade


                                        3
<PAGE>


          fixtures, machinery and equipment, cabinetwork,  furniture and movable
          partitions  owned or  installed  by the  Tenant at the  expense of the
          Tenant or being the property of the Tenant in the Demised  Premises or
          the  Building  or  the  Project,  or  relating  to  or in  respect  of
          improvements to the Demised  Premises built,  made or installed by the
          Tenant or the  Landlord  or at the  Landlord's  or  Tenant's  request,
          whether  any such  taxes are  payable  by law by the  Tenant or by the
          Landlord and whether  such taxes are  included by lawful  authority in
          the taxes,  licences,  rates, duties and assessments imposed or levied
          on or with respect to the Lands or the Project. "Tenant's Taxes" shall
          also  include  any and all  penalties  or other like  charges for late
          payment thereof;

         TERM means the term of this Lease, as set out in paragraph 2.2, plus if
         any extension  thereof is provided for herein and such extension  right
         (or rights) is  exercised  by the Tenant in  accordance  herewith,  the
         period of such exercised extension (or extensions).

SCHEDULES

1.2       The provisions of Schedules hereto are incorporated herein and form
part of this Lease.

GOVERNING LAW

1.3       This Lease shall be construed and governed by the laws of the province
in which the  Demised  Premises  are  located,  and each of the  parties  hereto
severally attorns to the jurisdiction of the courts of such province. Should any
provisions  of this Lease be illegal or  unenforceable  it should be  considered
separate and several from the Lease and its remaining provisions shall remain in
force  and be  binding  upon  the  parties  hereto  as  though  the  illegal  or
unenforceable provision had never been included.

HEADINGS

1.4       The headings in this Lease form no part of this Lease and shall be 
deemed to have been inserted for convenience of reference only.

INTERPRETATION

1.5       Unless the context otherwise  requires,  the word "Landlord"  wherever
it is used herein shall be construed to include and shall mean the Landlord, its
successors  and/or assigns,  the word "Tenant" shall be construed to include and
shall mean the  Tenant  and the  executors,  administrators,  successors  and/or
assigns  of the  Tenant  and when  there are two or more  Tenants or two or more
persons  bound by the Tenant's  covenants  herein  contained  their  obligations
hereunder shall be joint and several, the word "Tenant" and the personal pronoun
"it" relating thereto and used therewith shall be read and construed as Tenants,
and "his", "her", "its" or "their" respectively, as the number and gender of the
party or parties referred to each require and the number of  the verb  agreeing 
therewith, shall be construed and agree with the said word or pronoun so 
substituted.

                                       4

<PAGE>


USE OF "HEREIN", "HEREOF", ETC.

1.6            In  this  Lease,  "herein",  "hereof",  "hereby",  "hereunder",  
"hereto",  "hereinafter" and similar  expressions refer to this Lease and not to
any  particular  paragraph,  section or other portion  thereof,  unless there is
something in the subject matter or context  inconsistent  therewith.  Paragraphs
referred to by number are the  paragraphs  so  numbered in this Lease.  TERMS AS
COVENANTS

1.7            All terms of this Lease and obligations of the parties  hereunder
shall be deemed to be covenants of the parties hereto,  whether or not so stated
in this Lease.

                                    ARTICLE 2

                              DEMISE, TERM AND USE

DEMISE

2.1            In  consideration  of  the  rents,  covenants,  conditions  and 
agreements  hereinafter  reserved and  contained on the part of the Tenant to be
paid,  observed and performed the Landlord does demise and lease unto the Tenant
all and  singular the Demised  Premises,  upon the terms and  conditions  herein
contained.  The Tenant  acknowledges  that the Demised Premises are leased on an
"as is,  where is" basis,  and that the  Landlord is not  required to expend any
money or perform any work with respect to the same.

TERM

2.2            TO HAVE  AND TO HOLD the  Demised  Premises  for and  during  the
term  (the  "Term")  of  three  years   commencing   on  January  1,  1997  (the
"Commencement Date") and ending on December 31, 1999.

USE

2.3       The  Demised  Premises  shall  be  used by the  Tenant for the purpose
of administrative office, research and manufacturing of electronic equipment and
for no other use whatsoever  without the prior written  consent of the Landlord,
which consent may be withheld by the Landlord, acting reasonably.

USE OF COMMON AREAS AND FACILITIES, ETC.

2.4       In addition to the leasehold interest herein granted, the Tenant shall
have and the  Landlord  hereby  grants  to the  Tenant  its  employees,  agents,
customers  and  invitees,  in common  with the  Landlord  and all other  persons
authorized  by the  Landlord  from time to time, a licence over the Common Areas
and Facilities for the purpose of gaining access to and better using the Demised
Premises, provided however that this right shall in no way restrict the


                                       5

<PAGE>

Landlord from  maintaining  or improving  the Common Areas and  Facilities or of
changing the  location of or adding to the Building or any other  building on or
constructing  a new  building or buildings  on the Lands.  Without  limiting the
generality of the foregoing,  but subject to the above  limitations,  the Tenant
shall have the  following  rights in common  with all  others  from time to time
entitled thereto:

          (a)  the right to use the driveways  situate upon the Lands hereto for
               the purpose of ingress and egress from the Demised Premises; and


          (b)  the right to park its passenger  motor  vehicles and those of its
               employees and customers upon the Lands subject  always,  however,
               to any  restrictions  thereon which the Landlord may from time to
               time  impose  (which  the  Landlord  may do)  including,  without
               limitation  the  designation  of parking spaces for the exclusive
               use of other  tenants  of the  Project  and their  employees  and
               customers. 

POSSESSION

2.5       DELETED.

EXAMINATION OF DEMISED PREMISES

2.6        The Tenant shall examine the Demised Premises and the Building before
taking  possession  hereunder  and such  taking  of  possession  will be, in the
absence  of  agreement  in  writing  to  the  contrary,  evidence  that  on  the
Commencement  Date the Demised  Premises and the Building were in good order and
satisfactory  condition. No promise of the Landlord to alter, remodel or improve
the Demised  Premises  or the  Building  and no  representation  respecting  the
condition of the Demised  Premises or the Building has been made by the Landlord
other than those contained herein or made a part hereof.

OVERHOLDING

2.7        If at the  expiration  of the Term of this Lease the Tenant  shall 
hold over with the consent of the Landlord, the tenancy of the Tenant thereafter
shall,  in  the  absence  of  written   agreement  to  the  contrary,   be  from
month-to-month only at a rental per month equal to one-tenth of the Rent payable
for the year immediately  preceding such expiration,  payable monthly in advance
on the first  day of each  month and  shall be  subject  to all other  terms and
conditions of this Lease.


                                       6

<PAGE>



                                    ARTICLE 3

                             RENT AND OTHER PAYMENTS


BASIC RENT

3.1       YIELDING AND PAYING THEREFOR yearly and every year  during  the  said 
Term set out in paragraph 2.2 (for clarity,  not inclusive of extensions thereof
if any are  provided  for  herein)  as Basic Rent unto the  Landlord  the sum of
$307,248.00 in lawful money of Canada to be paid in advance in equal consecutive
monthly  instalments  of  $25,604.00  on the first  day of each and every  month
during the Term (but not any  extensions  thereof) to the Landlord,  but subject
however to the  provisions  of paragraph 5 of Schedule  "F" hereto.  If the Term
commences on any day other than the first or ends on any day other than the last
day of a calendar month, the Basic Rent and Additional Rent for the fractions of
a month at the  commencement  and at the end of the Term shall be  adjusted on a
per diem basis.

PAYMENTS TO LANDLORD

3.2       All  payments  required to be made to the Landlord by the Tenant under
or in respect of this Lease shall be made in lawful  currency of Canada,  to the
agent of the Landlord,  PPM Real Estate Managers (Canada) Limited at the address
set out on page 1 hereof  or at such  place  or  places  or  other  agent as the
Landlord may designate in writing.

ADDITIONAL RENT

3.3       All amounts  payable by the Tenant  pursuant to paragraphs  4.3, 4.4 
and 4.5 hereof shall be payable as Additional  Rent. In addition,  all sums paid
or expenses incurred hereunder by the Landlord, which ought to have been paid or
incurred  by the  Tenant,  or for which the  Landlord  hereunder  is entitled to
reimbursement  from the Tenant, and any interest owing to the Landlord hereunder
may be  recovered  by the  Landlord as  Additional  Rent by any and all remedies
available to it for the recovery of Rent in arrears.

PAYMENTS TO OTHERS

3.4       If the Tenant is required  hereunder to make any payments  other than
to the  Landlord,  the Tenant shall make such  payments  promptly and before any
interest or penalty for non-payment  attaches thereto.  In addition,  the Tenant
shall  produce to the Landlord  from time to time at the request of the Landlord
evidence  satisfactory to the Landlord  acting  reasonably of the due payment by
the Tenant of all payments required to be made by the Tenant under this Lease.

INTEREST ON OVERDUE AMOUNTS

3.5       The Tenant  shall pay to the  Landlord  interest  at the rate of six 
percent (6%) per annum over the prime rate being charged by the Landlord's bank,
from time to time on all  payments  of rent and other sums  required  to be made
under the provisions of this Lease which

                                       7



<PAGE>

have become overdue so long as such payments  remain  unpaid,  provided that the
provisions of this paragraph shall not limit any other rights or remedies of the
Landlord.

DISPUTES

3.6       In the  event of a  dispute  as to the  amount of  Operating  Costs,  
or the inclusion of any cost,  expense or amount in Operating  Costs,  then such
dispute shall be referred to the  Landlord's  auditor,  whose  decision shall be
final and binding upon the parties hereto.

DEPOSIT

3.7       The  Landlord  hereby  acknowledges  receipt  from the  Tenant of the 
sum of $73,011.09  (the  "Deposit"),  which shall be applied firstly toward Rent
and GST thereon for the second month of the Term, with the balance to be held by
the  Landlord  without  interest  as  security  for  the  payment  of  Rent  and
performance  of the Tenant's  obligations  under this Lease.  If at any time the
Tenant is in default of its  obligations  hereunder,  the Landlord  may,  either
before  or after  terminating  this  Lease,  apply  the whole or any part of the
Deposit  to cure such  default or to  compensate  the  Landlord  for any loss or
expense  incurred by the Landlord as a result thereof,  and such  application of
the Deposit  shall be without  prejudice to the  Landlord's  right to pursue any
other  remedy set forth in this Lease or  available  at law. If the whole or any
part of the Deposit is so applied by the Landlord, the Tenant will forthwith pay
to the Landlord a sufficient amount to restore the Deposit to the amount thereof
prior to such application by the Landlord.  If the Tenant promptly pays all Rent
as it falls due and  performs  all of its  obligations  under  this  Lease,  the
Landlord  will  repay  the  Deposit  to the  Tenant  within  60 days  after  the
termination  of this Lease.  The  Landlord may deliver and assign the Deposit to
any purchaser of the Landlord's  interest in the Demised  Premises and thereupon
the Landlord will be discharged  of any further  liability  with respect to such
Deposit.


                                    ARTICLE 4

                      MISCELLANEOUS COVENANTS OF THE TENANT

The Tenant covenants with the Landlord as follows:

PAY RENT

4.1       The Tenant  shall,  during the Term,  pay unto the  Landlord the Basic
Rent hereby reserved in the manner hereinbefore mentioned without any set-off or
deduction whatsoever save as specifically provided for herein, together with all
GST  payable  in  respect  of this  Lease as and when  required  to do so by the
Landlord.

PAY TENANT'S TAXES

4.2       The Tenant shall pay all Tenant's  Taxes on or before the due date 
thereof.  If the  Tenant  neglects  or refuses to pay any  Tenant's  Taxes,  the
Landlord  may,  at its  option,  pay

                                       8


<PAGE>


the same and  recover the amount paid by all  remedies  available  to it for the
recovery of Rent in arrears.

PAY UTILITIES

4.3       The Tenant shall pay all rates and charges for water, gas and electric
light and/or power,  heating,  fuel, telephone or other utilities supplied to or
used in the Demised Premises as separately metered or separately invoiced by the
supplier thereof,  and, if not so separately  metered or invoiced,  the Tenant's
Proportionate  Share of such rates and  charges;  PROVIDED  HOWEVER  that if the
Landlord,  acting  reasonably,  determines  that an  allocation of such rates or
charges on a Proportionate Share basis would not be equitable,  the Landlord may
allocate  such rates and  charges on a  reasonable  basis  amongst  the  various
tenants of the  Building  or of the  Development,  and the Tenant  shall pay its
share of the same as reasonably determined by the Landlord.
PAY PROPORTIONATE SHARE OF TAXES

4.4       The  Tenant shall  during and in  respect of  the Term pay  its 
Proportionate Share of Taxes. The Tenant's Proportionate Share of Taxes shall be
estimated by the Landlord for such period as the Landlord may determine  (not to
exceed 12 months)  and the Tenant  shall pay the same to the  Landlord  in equal
monthly instalments  together with the regular monthly instalments of Basic Rent
as set out in  paragraph  3.1.  The  Landlord  shall  furnish  to the  Tenant an
estimate of the  Proportionate  Share of Taxes  payable by the Tenant during the
period so determined by the  Landlord.  At the end of such period,  the Landlord
shall  furnish  the Tenant with a  statement  showing  the actual  amount of the
Proportionate  Share  of  Taxes  paid  and  payable  by  the  Tenant  and  if an
overpayment  has been made by the Tenant,  the Landlord shall credit such amount
to the Tenant's Proportionate Share of Taxes for the ensuing period and if there
is no ensuing  period such  amount  shall be paid to the Tenant and if an amount
remains owing to the Landlord in respect of the Tenant's  Proportionate Share of
Taxes, the Tenant shall forthwith pay such amount to the Landlord.

PAY PROPORTIONATE SHARE OF OPERATING COSTS

4.5       The Tenant  shall  during  and in respect of the Term pay its  
Proportionate  Share of Operating Costs as follows:  the Tenant's  Proportionate
Share of  Operating  Costs shall be estimated by the Landlord for such period as
the  Landlord may  determine  (not to exceed 12 months) and the Tenant shall pay
the same to the Landlord in equal monthly instalments  together with the regular
monthly  instalments  of Basic Rent as set out in  paragraph  3.1.  The Landlord
shall furnish to the Tenant an estimate of the Proportionate  Share of Operating
Costs payable by the Tenant during the period so determined by the Landlord.  At
the end of such period,  the Landlord  shall furnish the Tenant with a statement
showing the actual amount of the Proportionate Share of Operating Costs paid and
payable by the Tenant,  and the Landlord and Tenant covenant and agree each with
the  other  that  if an  overpayment  of the  Tenant's  Proportionate  Share  of
Operating  Costs has been made by the Tenant,  the  Landlord  shall  credit such
amount to the Tenant's  Proportionate  Share of Operating  Costs for the ensuing
period and if there is no ensuing period such amount shall be paid to the Tenant
and if an amount  remains


                                        9


<PAGE>


owing  to the  Landlord  in  respect  of the  Tenant's  Proportionate  Share  of
Operating Costs, the Tenant shall forthwith pay such amount to the Landlord.

NO NUISANCE

4.6       The Tenant shall not at any time during the  Term, use,  exercise or
carry on or permit or suffer to be used, exercised or carried on, in or upon the
Demised  Premises or any part  thereof any noxious,  noisome or  offensive  act,
trade,  business,  occupation or calling, and no act, matter or thing whatsoever
shall at any time during the Term be done in or upon the Demised Premises or any
part thereof which shall or may be or grow to the annoyance, nuisance, damage or
disturbance  of the occupiers or owners of the Lands,  Project or adjoining land
and properties.

COMPLY WITH LAWS, ETC.

4.7       The Tenant shall comply  promptly at its expense with all laws,  
ordinances,   regulations,   requirements  and  recommendations   which  may  be
applicable  to the Tenant or to the manner of use of the Demised  Premises,  and
shall comply with any and all federal,  provincial,  civic,  municipal and other
authorities or association of insurance  underwriters  or agents and all notices
in pursuance of same and whether served upon the Landlord or the Tenant. Without
limiting the generality of the foregoing, the Tenant shall comply fully with the
provisions of Schedule "D" hereto.

COMPLY WITH RULES AND REGULATIONS

4.8       The Tenant shall observe and comply with the rules and regulations  
attached hereto as Schedule "C" with such reasonable  variations,  modifications
and  additions  as shall from time to time be made by the Landlord and any other
and further  reasonable  rules and regulations  that may be made by the Landlord
and  communicated  to the  Tenant in  writing,  and the Tenant  shall  cause its
agents,  servants or  employees  to observe  and comply with the same.  All such
rules and regulations  shall be read as forming part of the terms and conditions
of this Lease as if the same were  embodied  herein as  covenants of the Tenant,
and the Tenant's  failure to keep and observe such rules and  regulations  shall
constitute a breach of this Lease.

GOODS, CHATTELS, ETC. NOT TO BE REMOVED

4.9       The Tenant agrees that all goods,  chattels and fixtures when moved 
into the Demised Premises shall not except in the normal course of business,  be
removed from the Demised Premises until all Rent due or to become due during the
Term of this Lease and all utility  charges are fully paid.  The Tenant  further
covenants  and agrees that if the Tenant  shall at any time be in default  under
any of the terms,  covenants or agreements  contained herein, the Landlord shall
have a lien on all of the Tenants  goods,  chattels and fixtures  located in the
Demised  Premises,  but excluding  however  electronic  data storage  equipment,
backup tapes and software  media, as security  against loss or damage  resulting
from any such  default,  and such  goods,  chattels  and  fixtures  shall not be
removed  from the  Demised  Premises by the Tenant  until such  default is cured
unless the Landlord directs otherwise.


                                       10

<PAGE>


USE OF DEMISED PREMISES

4.10      The  Tenant  shall not use the Demised  Premises  nor suffer or permit
the Demised  Premises to be used for any other purpose than that provided for in
paragraph  2.3,  nor shall the Tenant use the Demised  Premises in any way which
will impair the  efficient and proper  operation of the sprinkler  system in the
Building.

CONTINUOUS OCCUPATION

4.11      The Tenant shall  commence the use of the Demised  Premises  referred 
to in paragraph 2.3 within 30 days from the Commencement Date and shall carry on
such use continuously during the Term.

SIGNS

4.12      The Tenant shall not,  without the  Landlord's  prior  written 
permission,  paint,  display,  inscribe,  place  or  affix  any  sign,  picture,
advertisement,  notice, lettering or direction on any part of the outside of the
Building  or the  Project or visible  from the  outside of the  Building  or the
Project  or in any  corridor,  hallway,  entrance  or other  public  part of the
Building  or  Project;  PROVIDED  THAT the  Landlord  shall  prescribe a uniform
pattern for identification  signs for tenants to be placed on the outside of the
main door  leading  into the  Demised  Premises;  FURTHER  PROVIDED  THAT at the
request of the Tenant and at the Tenant's expense, the Landlord shall cause such
a sign to be placed in position.

PEACEFUL SURRENDER

4.13      The Tenant shall, at the expiration or sooner termination of the 
said  Term,  peaceably  surrender  and yield up unto the  Landlord  the  Demised
Premises with the  appurtenances,  together with all fixtures or erections which
at any time  during the said Term shall be made  therein or thereon  (other than
tenant's or trade  fixtures  removed  pursuant to paragraph  4.15 or Alterations
which the Landlord  requires to be removed pursuant to paragraph 7.2(b)) in good
and  substantial  repair and condition,  reasonable  wear and tear and damage by
fire or other  insured peril  excepted,  and deliver to the Landlord all keys to
the Demised Premises which the Tenant has in its possession.

CONDITION AT EXPIRATION

4.14      The Tenant shall immediately before the expiration or sooner 
termination of the Lease wash the floors,  windows, doors, walls and woodwork of
the Demised Premises. The Tenant further covenants that the Tenant will not upon
such  expiration  or sooner  termination  leave upon the  Demised  Premises  any
rubbish or waste  material  and will leave the  Demised  Premises in a clean and
tidy  condition.  Without  limiting the generality of the foregoing,  the Tenant
shall  ensure that all trade  fixtures  and other items which the Tenant has the
right or  obligation  hereunder  to remove from the Demised  Premises  are fully
removed, and any damaged caused by such removal is fully made good, on or before
the last day of the Term.


                                       11

<PAGE>



REMOVAL OF FIXTURES

4.15      Subject to  paragraph 4.9 hereof the Tenant may at the expiration
of the Term  hereby  granted,  take,  remove  and carry  away  from the  Demised
Premises all fixtures,  fittings,  shelving, counters or other articles upon the
Demised  Premises  in the nature of trade or tenants'  fixtures,  but the Tenant
shall in such removal do no damage to the Demised  Premises,  or shall make good
any damage which the Tenant may occasion thereto; PROVIDED THAT the Tenant shall
not remove or carry away from the Demised  Premises  any part of the Building or
any plumbing,  heating,  air-conditioning  or ventilating  plant or equipment or
other Building services;  PROVIDED FURTHER that notwithstanding  anything herein
contained the Landlord  shall have the right upon the  termination of this Lease
by  effluxion  of  time or  otherwise  to  require  the  Tenant  to  remove  its
installations,  alterations,  additions,  partitions and fixtures or anything in
the nature of leasehold  improvements  made or installed by the Tenant or by the
Landlord  on behalf of the  Tenant  and to make  good any  damage  caused to the
Demised Premises by such removal.

USE OF WASHROOMS

4.16      The Tenant shall keep and maintain the  washrooms in a sanitary 
condition,  and shall not use the washrooms,  or suffer or permit its customers,
licensees, invitees, servants, agents, or employees to use the washrooms for any
purpose other than the purpose for which they were designed.

OVERLOADING

4.17      The  Tenant  shall  not do or  suffer  or  permit  any  waste or
damage,  disfigurement  or injury to the Demised  Premises or the  fixtures  and
equipment thereof or permit or suffer any overloading of any floor thereof,  and
shall not place in, on or about the Demised  Premises any  fixtures,  equipment,
machinery or materials of a weight beyond the capacity for which the Building is
designed,  or to the extent  that will  cause  damage to the  Building  or cause
excessive  vibration.  The Tenant  shall  repair any damage  done to the Demised
Premises or the Building by reason of any excessive weight placed in the Demised
Premises or excessive vibration caused in the Demised Premises.

NUISANCE AND WASTE

4.18      The Tenant shall not cause or suffer or permit  any oil or grease
or any harmful,  objectionable,  dangerous,  poisonous  or  explosive  matter or
substance  to be  discharged  into the Demised  Premises or the  Building or the
Development  or into  the  driveways,  common  areas,  ditches,  water  courses,
culverts,  drains or sewers in or adjacent thereto, and will take all reasonable
measure  for  insuring  that any  effluent  discharged  will  not be  corrosive,
poisonous  or  otherwise  harmful,  or cause  obstruction,  deposit or pollution
within  the  Demised  Premises,  or  the  Building,  or the  Development  or the
driveways,  common areas, ditches,  water courses,  culverts,  drains, or sewers
thereof.  Without  limiting the  generality of the  foregoing,  the Tenant shall
comply fully with the provisions of Schedule "D" hereto.


                                       12


<PAGE>

ACCESS

4.19      The Tenant shall not permit any vehicles belonging to the Tenant,
its customers,  invitees,  licensees, agents or servants to cause obstruction on
any roads,  driveways or common areas in the neighbourhood of the Development or
prevent  the  ingress  or egress to all other  tenants in the  Building  and the
Development  and will use its best  endeavours  to  ensure  that  persons  doing
business  with the  Tenant and its  servants  and  workers  shall not permit any
vehicles to cause such obstruction as aforesaid.

USE OF YARD AREAS

4.20      The Tenant shall not place,  nor suffer or permit its customers,
invitees,  licensees,  agents or servants to place any  materials in the yard or
yards of the Project or the adjacent driveways,  parking or common areas thereof
and shall  cause no  obstruction  to  vehicles  operating  on the said  adjacent
driveways, parking or common areas.

NO AUCTION

4.21      The  Tenant  shall not at any time  permit  any sale by  auction 
to be held within the Demised Premises or upon the Lands or any part thereof.

ESTOPPEL CERTIFICATES

4.22       To provide  within 15  calendar  days of the request and at the 
cost of the Landlord (such cost to be reasonable)  an estoppel  certificate  for
the Landlord,  addressed to the Landlord and any  potential  buyer or mortgagee,
binding  upon the  Tenant,  in the  Landlord's  standard  form  containing  such
statements as the Landlord may  reasonably  require with  reasonable  promptness
upon request by the Landlord.

LANDLORD MAY PERFORM TENANT'S COVENANTS

4.23      If the Tenant shall fail to perform or cause to be performed each
and every one of the  covenants  and  obligations  of the  Tenant in this  Lease
contained  the  Landlord  shall have the right (but shall not be  obligated)  to
perform  or cause  the same to be  performed  and to do or cause to be done such
things as may be necessary or incidental thereto (including without limiting the
foregoing,  the  right to make  repairs,  installations,  erections  and  expend
moneys) and all payments,  expenses, charges, fees and disbursements,  including
reasonable solicitors' fees and disbursements,  incurred or paid by or on behalf
of the Landlord in respect  thereof  shall be paid by the Tenant to the Landlord
forthwith.

                                       13


<PAGE>

                                    ARTICLE 5

                              LANDLORD'S COVENANTS

The Landlord covenants with the Tenant as follows:

QUIET ENJOYMENT

5.1       The Tenant, paying the Rent hereby  reserved  and  performing  the 
covenants herein on the Tenant's part contained, shall and may peaceably possess
and  enjoy  the  Demised  Premises  for the  Term  hereby  granted  without  any
interruption  or  disturbance  from the  Landlord or any other person or persons
lawfully  claiming by, from or under the Landlord;  SUBJECT ALWAYS to the terms,
covenants and conditions contained in this Lease.

TAXES

5.2       The Landlord shall pay or cause to be paid Taxes subject to  
contribution by the Tenant as provided in paragraph 4.4 hereof.

MANAGEMENT, OPERATION AND MAINTENANCE

5.3       The Landlord acting reasonably shall manage, operate, maintain, repair
and replace the Project and Lands subject to the cost and expense  thereof being
contributed to by the Tenant as provided in paragraph 4.5 hereof.


                                    ARTICLE 6

                             INSURANCE AND INDEMNITY

TENANT INSURANCE

6.1       The  Tenant  shall,  at its expense, provide and maintain in force 
          during the Term:

     (a) plate glass insurance,  for the benefit of the Landlord and the Tenant,
     covering  all plate glass in the Demised  Premises,  including  plate glass
     windows and doors, in an amount equal to the full insurable value thereof;

     (b) owned automobile  insurance with respect to all motor vehicles owned by
     the Tenant and operated in its business;

     (c)  comprehensive  general  liability of not less than  $3,000,000.00  per
     occurrence and property damage  insurance,  including fire,  tenant's legal
     liability  insurance,  for the  benefit  of  injury or death to one or more
     persons,  or property  damage,  occurring  in the  Demised  Premises or the
     Building or on the Development; and


                                       14

<PAGE>



     (d)  insurance in respect of fire and such other perils as are from time to
     time  defined  in the usual  extended  coverage  endorsement  covering  the
     Tenant's leasehold improvements, trade fixtures and furniture and equipment
     to the full insurable value thereof.

DETAILS OF POLICIES

6.2       All policies of insurance required to be maintained by the Tenant 
shall have the following provisions or characteristics:

               (a) all insurance shall be effected with insurers and brokers and
               upon terms and conditions  satisfactory  to the Landlord,  acting
               reasonably; 

               (b) to the extent  applicable,  all policies of  insurance  shall
               contain a waiver of subrogation  clause in favour of the Landlord
               and shall also  contain a clause  requiring  the  insurer  not to
               cancel or change the insurance  without first giving the Landlord
               30 days' prior written notice thereof; and

               (c) all  policies  of  insurance  shall be written to protect the
               Landlord   and  its   mortgagees,   if  any,   and  the   Tenant,
               notwithstanding  any act or neglect of such  parties  which might
               otherwise  result in the  forfeiture  of such  policies or any of
               them.

PROOF OF INSURANCE

6.3       The Tenant shall provide, upon request,  proof of  new or  continued 
insurance to the Landlord at least 7 days prior to the  expiration  date recited
in any of the Tenant's insurance policies,  such proof to be in form and content
satisfactory to the Landlord,  acting  reasonably.  The Tenant agrees that if it
does not provide or maintain in force such  insurance,  the  Landlord  may,  but
shall not be obligated to, take out the necessary  insurance and pay the premium
therefor  for  periods of one year at a time,  and the  Tenant  shall pay to the
Landlord as Additional Rent the amount of such premium immediately on demand. In
the event the Landlord  takes out insurance as aforesaid,  the Landlord shall in
no way be responsible for the sufficiency of such insurance.

PRIORITY OF CLAIMS

6.4       If both the Landlord and the Tenant have claims to be indemnified  
under any such insurance, the indemnity shall be applied first to the settlement
of the claim of the Landlord and the balance,  if any, to the  settlement of the
claim of the Tenant.

ACTS CONFLICTING WITH INSURANCE

6.5       The  Tenant  shall not do or  permit  to be done any act or thing  
which may render  void or  voidable or  conflict  with the  requirements  of any
policy or policies of insurance,  including any  regulations  of fire  insurance
underwriters applicable to such policy or policies, whereby the Demised Premises
or the Building or the  Development  are insured or which may cause any increase
in premium to be paid in respect of any such policy. If any such policy or


                                       15


<PAGE>


policies is or are cancelled by reason of any act or omission of the Tenant, the
Landlord shall have the right at its option to terminate this Lease forthwith by
giving written  notice of  termination  to the Tenant,  and if the premium to be
paid in respect of any such  policy is  increased  by any act or omission of the
Tenant  (including the use of the Demised Premises  described in paragraph 2.3),
the Tenant shall pay to the  Landlord the amount by which said premium  shall be
so increased.

INDEMNITY TO THE LANDLORD

6.6       The Tenant shall  indemnify  and save harmless the Landlord from any
and all liabilities, damages, costs, claims, suits or actions arising out of:


          (a)  any  breach,   violation  or  non-performance  of  any  covenant,
          condition or  agreement  in this Lease set forth and  contained on the
          part of the Tenant to be fulfilled, kept, observed or performed;

          (b) any occurrence in, upon, about or at the Demised Premises,  except
          to the extent  caused by the  negligence  or wilful  misconduct of the
          Landlord;

          (c) any and all costs  incurred  by the  Landlord  in making  good any
          damage  caused  to  the  Development   including  the  furnishing  and
          amenities  thereof  as a result  of the  negligent  or  wilful  act or
          omission  of the  Tenant or any  person  for whom the Tenant is in law
          responsible; and

          (d) any injury to any  licensee,  invitee,  agent or  employee  of the
          Tenant, including death resulting at any time therefrom,  occurring in
          or  about  the  Development,  except  to  the  extent  caused  by  the
          negligence or wilful misconduct of the Landlord;

and this indemnity shall survive the expiry or sooner termination of this Lease.

FURTHER INDEMNITY

6.7       Notwithstanding anything to the contrary herein contained, if the 
Project or the Building or any part thereof or any appurtenance thereto, becomes
damaged or  destroyed  through the  negligence  or wilful act or omission of the
Tenant  or any  person  for  whom the  Tenant  is in law  responsible,  then all
necessary  repairs,  replacements or alterations shall at the sole option of the
Landlord,  be made either by the Landlord or the Tenant,  but in any event,  the
expense  thereof  shall be borne by the  Tenant  who  shall  pay the same to the
Landlord  forthwith on demand and the same shall be  collectible by the Landlord
from the Tenant as if Rent in arrears;  the provisions of paragraph 7.1(c) shall
apply to this  paragraph  if the Tenant is  required  to carry out the  repairs,
replacements or alterations pursuant to this paragraph.

LANDLORD NOT RESPONSIBLE FOR INJURIES, LOSS, DAMAGE

6.8       The Landlord shall not be  responsible in any way for any injury  
(including  death) to any  person  or for any loss of or damage to any  property
belonging  to the Tenant or to other  occupants  of the  Demised  Premises or to
their respective customers, invitees,

                                       16

<PAGE>


licensees,  agents, servants or any other persons from time to time attending at
the Demised  Premises  while such person or property is in or about the Building
or  Development  or  any  roadways,  parking  areas,  lawns,  sidewalks,  steps,
truckways, platforms, corridors, or stairways in connection therewith, including
without  limiting  the  foregoing,  any loss of or damage  to any such  property
caused by theft or  breakage,  or by steam,  water,  rain or snow which may leak
into, issue or flow from any part of the Building or Development or any adjacent
or neighbouring  lands or premises or from any other place or quarter or for any
loss of or damage caused by or  attributable  to the condition or arrangement of
any electric or other wiring or for any damage  caused by smoke or anything done
or omitted to be done by the  Landlord or by any other tenant of premises in the
Building or the  Project or for any other loss  whatsoever  with  respect to the
Demised Premises and/or any business carried on therein.

NO LIABILITY FOR INDIRECT DAMAGES

6.9       Under no  circumstances  shall  the  Landlord  be liable  for  
indirect or consequential damage or damages for personal discomfort,  illness or
death by reason of the  non-performance or partial  performance of any covenants
of the Landlord herein contained  including,  without limiting the generality of
the  foregoing,  the heating of the Demised  Premises  or the  operation  of the
air-conditioning  equipment,  plumbing or other equipment in the Building or the
Demised Premises.

LANDLORD INSURANCE

6.10      The  Landlord  shall take out and keep in force  during the Term
insurance with respect to the Development except for the leasehold  improvements
in the Demised Premises. The insurance to be maintained by the Landlord shall be
in respect of periods and to amounts and on terms and conditions which from time
to time are insurable at a reasonable  premium and which are normally insured by
reasonably prudent owners of properties similar to the Development,  all as from
time to time determined at reasonable  intervals by insurance  advisors selected
by the Landlord,  and whose opinion  shall be  conclusive.  Unless and until the
insurance advisors shall state that any such perils are not customarily  insured
against by owners of  properties  similar to the  Development,  the perils to be
insured  against by the  Landlord  shall  include,  without  limitation,  public
liability, boilers and machinery and fire and extended perils and may include at
the option of the  Landlord  losses  suffered by the Landlord in its capacity as
Landlord through business interruption.

                                    ARTICLE 7

                             REPAIRS AND ALTERATIONS

REPAIRS

7.1      (a) The Tenant shall, during the Term and at the Tenant's sole cost and
         expense,  well  and  sufficiently  renew,  rebuild,   repair,  replace,
         operate,  maintain,  paint  and keep  the  Demised  Premises,  with the
         appurtenances and all fixtures including plumbing, electrical, heating,
         air-conditioning   and  other  facilities  and  systems,  in  good  and


                                       17

<PAGE>

         substantial  repair  when,  where  and  so  often  as  need  shall  be,
         reasonable  wear and tear and  damage by fire and other  risks  against
         which the Landlord is insured only excepted.

         (b) The Landlord and its agents shall have the right at all  reasonable
         times  during the Term,  to enter the  Demised  Premises to examine the
         condition  thereof,  and the Tenant shall well and sufficiently  repair
         and  make  good the  Demised  Premises  according  to  notice  from the
         Landlord,  such repairs to be made as  expeditiously as possible but in
         any event within the time provided for by the Landlord.

         (c) The Tenant shall, when necessary and whether upon receipt of notice
         from the Landlord or not, effect and pay for such repairs, replacements
         or  alterations as may be the  responsibility  of the Tenant under this
         Lease by the use of contractors or other qualified  workers  designated
         or approved by the  Landlord in writing.  If the Tenant fails to comply
         with the  Landlord's  request to effect such repairs,  replacements  or
         alterations  within the time  provided  for by the  Landlord,  then the
         Landlord may cause such  repairs,  replacements  or  alterations  to be
         undertaken.  In that event, or in the event that the Landlord elects to
         make the repairs,  replacements or alterations referred to in paragraph
         6.7,  then the Landlord  shall be entitled to recover from the Tenant a
         fee of supervision  for the carrying out of such repairs,  replacements
         or  alterations,  such fee to be an amount  equal to 15% of the  moneys
         expended or of the cost of repairs, replacements or alterations carried
         out by or under the supervision of the Landlord,  which amount shall be
         in addition to the cost of such work or moneys  expended,  and the cost
         of such work or  moneys  expended  together  with the said fee shall be
         collectible by the Landlord from the Tenant as if Rent in arrears.  The
         Rent hereunder shall in no wise abate while such repairs,  replacements
         or alterations  are being made by reason of loss or interruption of the
         business of the Tenant because of the prosecution of any such work.

         (d) The Tenant  shall  throughout  the term  operate and  maintain  the
         heating,  ventilating,  air-conditioning and humidity control equipment
         (herein  referred to as "HVAC") within or serving the Demised  Premises
         in such a manner as to maintain  reasonable  conditions of temperature,
         air circulation and humidity within the Demised  Premises as determined
         by the Landlord. The Tenant shall comply with such reasonable rules and
         regulations as the Landlord shall make from time to time respecting the
         maintenance,  repair  and  operation  of the HVAC and  shall,  upon the
         request  of the  Landlord  and at the cost of the  Tenant,  obtain  and
         maintain  throughout the term a preventative  maintenance  contract for
         the HVAC with a maintenance company acceptable to the Landlord.

ALTERATIONS

7.2      (a) The  Tenant  shall not  without  the prior  written  consent of the
         Landlord,  which consent shall not be unreasonably  withheld,  make any
         installations,  alterations,  repairs  or  improvements  in or  to  the
         Demised Premises (collectively "Alterations").  The Tenant shall submit
         to the Landlord  detailed plans and  specifications  of any Alterations
         when  applying  for  consent,  and the  Landlord  reserves the right to
         recover from the


                                       18

<PAGE>


          Tenant the cost of having its  architects  or  engineers  examine such
          plans and  specifications.  The  Landlord  may require that any or all
          work to be done, or materials to be supplied  hereunder  shall be done
          or supplied by the Landlord's contractors and/or workers provided that
          the  cost  of  such  work  or  materials  shall  be  reasonable  or by
          contractors and/or workers engaged by the Tenant but first approved by
          the Landlord. In any event, any or all work to be done or materials to
          be  supplied  hereunder  shall be at the sole cost and  expense of the
          Tenant and shall be done and  supplied  and paid for in the manner and
          according  to such terms and  conditions,  if any as the  Landlord may
          prescribe. Any connections of apparatus to the electrical system other
          than a connection to an existing base receptacle shall be deemed to be
          an Alteration  within the meaning of this paragraph.  No connection to
          an existing base receptacle shall be made if such connection would, if
          made, overload the capacity of such receptacle.

          (b) Any  Alterations,  business  and  trade  fixtures,  machinery  and
          equipment, cabinet work, furniture or immovable partitions attached to
          the Demised Premises in any way other than by their own weight and all
          plumbing or wiring  installed  by or on behalf of the Tenant  shall be
          deemed to become the Landlord's property forthwith upon their being so
          attached.  Notwithstanding the foregoing,  the Landlord may by written
          notice to the  Tenant at least 60 days prior to the expiry of the Term
          elect  to  require  the  Tenant  to  remove  all  or any  part  of the
          Alterations,  business and trade  fixtures,  machinery and  equipment,
          cabinet work,  furniture or immovable partitions owned or installed by
          the Tenant at the expiration of this Lease, in which case such removal
          shall be done at the  Tenant's  expense and the Tenant  shall,  at its
          expense,  repair any  damage to the  Demised  Premises  caused by such
          removal.  If the Tenant does not remove such property  forthwith  upon
          written  notice from the  Landlord,  the Landlord may remove the same,
          and the cost of such removal and the cost of  repairing  any damage to
          the Demised Premises  occasioned thereby shall be paid to the Landlord
          by the Tenant  forthwith  upon demand,  and the  Landlord  will not be
          responsible  for any loss or  damage to such  property  caused by such
          removal.

          (c) The Tenant shall  promptly pay all charges  incurred by the Tenant
          for any work,  materials  or  services  that may be done,  supplied or
          performed  in  respect of the  Demised  Premises  and shall  forthwith
          discharge  any liens at any time filed  against  the Lands or any part
          thereof and shall keep the Lands free from liens.  If the Tenant fails
          to do so, the Landlord may, but shall be under no  obligation  to, pay
          into Court the amount  required to obtain a discharge of any such lien
          in the name of the  Tenant and any  amount so paid  together  with all
          disbursements  and costs in respect of such proceedings on a solicitor
          and client basis shall be  forthwith  due and payable by the Tenant to
          the Landlord as Additional  Rent.  The Tenant shall allow the Landlord
          to post and keep posted on the Demised  Premises  any notices that the
          Landlord  may  desire  to post  under  the  provisions  of  applicable
          builders' or mechanics' lien or other legislation.


          (d) The Tenant  shall not  without  the prior  written  consent of the
          Landlord put up any window  drapes,  blinds,  awnings or other similar
          things or cover the floors with anything other than loose rugs.


                                       19
<PAGE>


NOTICE OF ACCIDENTS, DEFECTS, ETC.

7.3       The Tenant shall give the Landlord prompt written notice of any damage
to or defect in the heating and  air-conditioning  apparatus,  water pipes,  gas
pipes, telephone lines, electric light or other wires or other casualty.

CARE OF DEMISED PREMISES

7.4      (a) The Tenant shall take good care of the Demised Premises and keep 
          same in a clean, tidy and healthy condition.

         (b) The Tenant  shall at its own expense be  responsible  for and shall
         maintain and replace from time to time as may be  reasonably  necessary
         during  the  Term of this  Lease  all  light  fixtures,  bulbs,  tubes,
         ballasts,  starters and fuses in the Demised Premises.  Notwithstanding
         the  foregoing,  the  Landlord  shall  have the right to attend to such
         maintenance and replacements,  but the expense thereof shall remain the
         responsibility of the Tenant.

         (c) The Tenant  shall at its own expense  replace or repair,  under the
         direction  and to the  reasonable  satisfaction  of the  Landlord,  the
         glass,  locks and  trimmings  of the  doors  and  window in or upon the
         Demised Premises which become damaged or broken.

         (d) The  Tenant  shall not allow any  ashes,  refuse,  garbage or other
         loose or  objectionable  material to accumulate in or about the Demised
         Premise.

         (e) The Tenant  shall  place in  containers  of a type  approved by the
         Landlord all garbage and refuse and such containers  shall be deposited
         for pick-up at such times and places as are  designated in writing from
         time to time by the Landlord.

         (f) The Tenant shall  maintain in good  operating  condition and to the
         satisfaction  of the Landlord the water,  sewer and gas connections and
         all other mechanical systems in the Demised Premises and shall keep the
         same in clean and good working order.  It is understood and agreed that
         in case the said  fixtures and  equipment or any part thereof  shall be
         damaged or destroyed or become  incapable of performing their function,
         the Tenant shall repair or replace the same to the  satisfaction of the
         Landlord.

         (g) The Tenant shall make all repairs and  replacements  to the Demised
         Premises made necessary by reason of burglary or attempted burglary.

         (h) The Tenant shall heat the Demised  Premises at all reasonable times
         and shall  maintain  such heat at a  temperature  required  to  prevent
         damage of any nature or kind whatsoever to the Demised Premises, and if
         damage does occur to the Demised  Premises due to the Tenant's  failure
         to heat, the Tenant agrees to pay for the repairs arising thereby.

         (i) The Tenant shall keep well painted the painted portions of the
         interior of the Demised Premises.


                                       20

<PAGE>

LANDLORD'S RIGHT TO DO WORK

7.5      (a) The  Landlord  shall  have the  right to make  additions  to and/or
         improvements or  installations in and/or repairs to the Building and/or
         the  Project  and/or  the  Common  Areas and  Facilities  and  whenever
         reference  is made in this Lease to the  Building or the Project or the
         Common Areas and Facilities,  it shall mean the Building and/or Project
         and/or  the Common  Areas and  Facilities  as the same may be  changed,
         added to or  improved  from  time to time and in  relation  to any such
         additions,  improvements,  installations,  or repairs the  Landlord may
         cause such reasonable  obstructions of and interference with the use or
         enjoyment of the Project,  the Building,  the Demised  Premises  and/or
         Common Areas and  Facilities  as may be  reasonably  necessary  for the
         purposes   aforesaid  and  may  interrupt  or  suspend  the  supply  of
         electricity,  water or other  services  when  necessary  and until said
         additions,  improvements,  installations  or  repairs  shall  have been
         completed,  there shall be no  abatement in Rent nor shall the Landlord
         be liable by reason thereof.

         (b) The Landlord and any persons  authorized by the Landlord shall have
         the right to use, install,  maintain and/or repair pipes,  wires, ducts
         or other installations in, under or through the Demised Premises for or
         in connection  with the supply of any services to the Demised  Premises
         or any other  premises in the Building.  Such services  shall  include,
         without  limiting the  generality of the foregoing,  gas,  electricity,
         water,   sanitation,    telephone,   heating,    air-conditioning   and
         ventilation.  There  shall be no  abatement  of Rent  while  such  use,
         installation, maintenance and/or repair is being carried out, by reason
         of loss or  interruption  of the business of the Tenant  because of the
         prosecution of any such work.

         (c) The Landlord and any persons  authorized by the Landlord shall have
         the right to enter upon the Demised Premises to make such  decorations,
         repairs,  alterations,   improvements  or  additions  as  it  may  deem
         advisable  and the Landlord or any persons  authorized  by the Landlord
         shall be  allowed  to take  all  material  into  and  upon the  Demised
         Premises that may be required therefor.  There shall be no abatement of
         Rent while such  decorations,  repairs,  alterations,  improvements  or
         additions  are  being  made by reason  of loss or  interruption  of the
         business of the Tenant because of the prosecution of any such work.

         (d) The  Landlord  shall  provide  reasonable  advance  notice prior to
         exercising its rights under the preceding  provisions of this paragraph
         7.05 save in the case of a real or apprehended emergency,  when no such
         notice shall be required, and all additions, improvements, installation
         or repairs performed by the Landlord under the preceding  provisions of
         this  paragraph  7.05  shall  be made as  expeditiously  as  reasonably
         possible and in a manner which  interferes  as little as possible  with
         the Tenant's permitted use of the Demised Premises.

                                       21


<PAGE>


LANDLORD'S RIGHT TO INSPECT AND DISPLAY SIGN

7.6       During the Term hereby created any person or persons may inspect the 
Demised  Premises and all parts thereof at all  reasonable  times on producing a
written order to that effect signed by the Landlord or its agents.  In addition,
the  Landlord  shall have the right  during the last three months of the Term to
show the Demised  Premises to prospective  tenants during normal  business hours
upon reasonable  advance notice and to place upon the Demised  Premises a notice
of reasonable  dimensions and reasonably  placed so as not to interfere with the
business  of the Tenant,  stating  that the  Demised  Premises  are for rent and
further  provided that the Tenant will not remove such notice or permit the same
to be  removed  and will  co-operate  with the  Landlord  in the  showing of the
Demised Premises.

LANDLORD'S REPAIRS

7.7       The Landlord covenants with the Tenant:

          (a)      subject to Article 9, to keep in a good and reasonable  state
          of repair,  and consistent with the general  standards of buildings of
          similar age, character and comparable location in British Columbia:

                    (i)  the  Building  (other  than the  Demised  Premises  and
                         premises of other  tenants)  including the  foundation,
                         roof,  exterior walls including exterior glass portions
                         thereof,  the systems for interior climate control, the
                         elevators,  entrances, stairways, corridors and lobbies
                         and  washrooms  and other Common  Areas and  Facilities
                         from  time to time  provided  for use in  common by the
                         Tenant  and  other  tenants  of the  Building  and  the
                         systems provided for bringing  utilities to the Demised
                         Premises;  and 




                    (ii) the structural members or elements of the Building; and
         
          (b) to repair defects in construction  performed or installations made
          by the Landlord in the Demised  Premises and damage in respect of fire
          or other  perils  against  which the Landlord is required to or has in
          fact maintained insurance coverage hereunder.

                                   ARTICLE 8

                             TRANSFER AND ASSIGNMENT

ASSIGNING OR SUBLETTING

8.1       The  Tenant  shall  not  assign  this  lease or  sublet,  part with or
share  possession of the Demised  Premises or by licence permit any other person
or corporation to occupy the Demised  Premises in whole or in part and shall not
mortgage  this  Lease or any  right  hereunder  or  interest  herein  (herein  a
"Transfer")  without the prior written  consent of the Landlord,  which consent,
subject as hereinafter provided shall not be unreasonably  withheld. At the time
that the Tenant  requests the consent of the Landlord,  the Tenant shall deliver
to the Landlord


                                       22

<PAGE>


such  information in writing as the Landlord may reasonably  require  respecting
the proposed assignee, subtenant, occupant or licensee (herein the "Transferee")
including without limitation:


         (a)      the identity of the proposed Transferee;

         (b)      the specific terms and conditions of such proposed assignment,
         sublease or other dealing;

         (c)      the names and addresses of the beneficial owners of the shares
         of any proposed corporate Transferee;

         (d)      current information on the financial affairs and business 
         experience of the proposed Transferee, including references; and

         (e)      such other information as the Landlord may reasonably require.

Within 15 days of receiving  all of the  information  required as set out above,
the  Landlord  shall by  written  notice  advise the  Tenant  that the  Landlord
consents  or does  not  consent  to the  Transfer  or,  alternatively,  that the
Landlord has elected to exercise its right under paragraph 8.4.

NO RELEASE

8.2       In no event shall any  Transfer,  whether the Landlord has  consented 
to the same or not,  release  or  relieve  the Tenant  from its  obligations  to
perform fully all of the terms,  covenants  and  conditions of this Lease on its
part to be  performed  and in any  event  the  Tenant  shall be  liable  for the
Landlord's reasonable costs incurred in connection with the Tenant's request for
consent.

CHANGE OF CONTROL

8.3       If the Tenant is a  non-reporting or closely  held company, any change
in control of such  company  shall be deemed to be a Transfer  for the  purposes
hereof.

RIGHT OF LANDLORD TO TERMINATE

8.4       Notwithstanding anything to the contrary herein contained, upon the 
Landlord  receiving  a request  from the Tenant to consent  to a  Transfer,  the
Landlord  shall  have the right to  terminate  this  Lease  with  respect to the
portion of the Demised Premises which is the subject of the Transfer, such right
to be exercised by written  notice within 15 days of the Landlord  receiving all
of the  information  required  pursuant to  paragraph  8.1.  Should the Landlord
exercise its right of termination as aforesaid,  the Tenant shall have a further
period of 15 days from receipt of the Landlord's  notice to withdraw its request
for  consent to the  Transfer,  failing  which this Lease shall  terminate  with
respect  to the  portion of the  Demised  Premises  which is the  subject of the
Transfer as of the date set out in the Landlord's  notice of termination  (which
shall be not less than 30 nor more  than 60 days from the date of such


                                       23

<PAGE>


notice),  and the  Tenant  shall  pay Rent to the date of  termination  for such
portion of the  Demised  Premises,  following  which this Lease shall cease with
respect to such portion and all obligations  hereunder (save such as have arisen
prior to the date of termination) shall cease.

SALE BY LANDLORD

8.5       In the event of a sale or  conveyance  by the Landlord of the Lands on
which the Building is located or in the event of an  assignment of this Lease by
the  Landlord,  then to the  extent  such  purchaser  or  assignee  assumes  the
obligations  of the  Landlord  hereunder  the same shall  operate to release the
Landlord  from any future  liability  upon any of the  covenants or  conditions,
express or implied,  herein  contained on the part of the Landlord,  and in such
event the Tenant agrees to look solely to the responsibility of the successor in
interest  of the  Landlord.  If any  security  is given by the  Tenant to secure
performance of the Tenant's covenants hereunder,  the Landlord may transfer such
security,  to the purchaser of the reversion and thereupon the Landlord shall be
discharged from any further liability in reference thereto.


                                    ARTICLE 9

                              DAMAGE OR DESTRUCTION

DAMAGE OR DESTRUCTION WITHOUT TERMINATION

9.1       If during the Term hereby demised or any extension thereof the Demised
Premises  shall be damaged or destroyed by a peril or perils in respect of which
the Landlord is insured,  the Rent shall abate in proportion to that part of the
Demised Premises  rendered unfit for occupancy bears to the whole of the Demises
Premises until the Demised Premises are rebuilt; and the Landlord agrees that it
will with reasonable  diligence repair the Demised Premises unless the Tenant is
obligated to repair under the terms hereof or unless this Lease is terminated as
hereinafter provided; subject always to the provisions of paragraph 9.2 or 9.3.

DAMAGE OR DESTRUCTION WITH TERMINATION

9.2       If the Demised Premises or the Building of which the Demised Premises 
form a part or the Project are damaged or destroyed by any cause  whatsoever and
if in the opinion of the Landlord  reasonably  arrived at, the Demised  Premises
cannot be  repaired,  rebuilt or made fit for the  purposes of the Tenant or any
other  premises in the Building or the Project  cannot be  repaired,  rebuilt or
made fit for the purposes of other tenants, in either case within 90 days of the
damage or destruction,  the Landlord may, at its option, terminate this Lease by
giving  the  Tenant  within  30 days of such  damage  or  destruction  notice of
termination and thereupon the Basic Rent, Additional Rent and any other payments
for which the Tenant is liable under this Lease shall be apportioned and paid to
the date of such damage or destruction and the Tenant shall immediately  deliver
up  possession  of  the  Demised   Premises  to  the  Landlord;   PROVIDED  THAT
notwithstanding  the  termination  of this Lease as in this paragraph set forth,
the Tenant shall remain  liable for any  outstanding  obligations  of the Tenant
under this Lease as at the time of such termination.


                                       24

<PAGE>


DAMAGE OR DESTRUCTION OF BUILDING

9.3       If the  Building  or part thereof  shall be damaged or  destroyed and 
such  damage  or  destruction,  in  the  opinion  of  the  Landlord,  materially
interferes with the enjoyment of the Demised Premises by the Tenant, the Rent in
respect of the Demised  Premises shall abate in proportion to such  interference
during the period such interference shall continue.


                                   ARTICLE 10

                              DEFAULT AND RE-ENTRY

RE-ENTRY

10.1     (a) It is hereby  expressly agreed that if and whenever the Rent hereby
         reserved, or any part thereof, shall be unpaid for seven days after the
         date on which the same  ought to have  been  paid,  although  no formal
         demand  shall  have been  made  therefor,  or in case of the  breach or
         non-performance  of any of the covenants or agreements herein contained
         on the part of the Tenant which breach or non-performance continues for
         a period of 15 days after written  notice from the Landlord,  or if the
         Demised Premises are vacated or become vacant or remain  unoccupied for
         five days or are not used for the purpose  specified then and in any of
         such cases the Landlord shall have the immediate  right to re-enter and
         take possession of the Demised  Premises  whereupon,  at the Landlord's
         option,  the balance of the Term shall be forfeit and the  Landlord may
         remove all persons and  property  from the  Demised  Premises  and such
         property so removed may be stored wherever the Landlord  chooses at the
         Tenant's cost and expense.

         (b) Should the  Landlord  elect to  re-enter,  as herein  provided,  or
         should it take possession  pursuant to legal proceedings or pursuant to
         any notice  provided for by law, it may either  terminate this Lease or
         it may from  time to time  without  terminating  this  Lease  make such
         alterations  and  repairs  as may be  necessary  in order to relet  the
         Demised  Premises,  and may  relet  the  Demised  Premises  or any part
         thereof  for such  term or  terms  (which  may be for a term  extending
         beyond the Term of this  Lease) at such rental or rentals and upon such
         other terms and  conditions as the Landlord in its sole  discretion may
         deem  advisable;  upon each such  reletting,  all rents received by the
         Landlord  from such  reletting  for the  unexpired  portion of the Term
         shall be applied,  first, to the payment of any indebtedness other than
         Rent due hereunder  from the Tenant to the Landlord;  secondly,  to the
         payment  of  any  costs  and  expenses  of  such  reletting,  including
         brokerage fees and  solicitors'  fees and of costs of such  alterations
         and repairs;  thirdly, to the payment of Basic Rent and Additional Rent
         due and unpaid hereunder and the residue,  if any, shall be held by the
         Landlord  and  applied in payment of future Rent as the same may become
         due and payable  hereunder.  If such rents received from such reletting
         during any month are less than that  required  to be paid  during  that
         month by the Tenant hereunder, the Tenant shall pay all such deficiency
         to the Landlord.  Such deficiency shall be calculated and paid monthly.
         No such re-entry

                                       25


<PAGE>

          or taking  possession of the Demised Premises by the Landlord shall be
          construed as an election on its part to terminate  this Lease unless a
          written notice of such intention be given to the Tenant or left on the
          Demised   Premises.   Notwithstanding   any  such  reletting   without
          termination,  the  Landlord  may  at  any  time  thereafter  elect  to
          terminate this Lease for such breach.  Should the Landlord at any time
          terminate this Lease for any breach, in addition to any other remedies
          it may have it may recover from the Tenant all damages it may incur by
          reason of such breach,  including the cost of re-entering  the Demised
          Premises,  reasonable  solicitors' fees and including the worth at the
          time of such termination of the excess,  if any, of the amount of rent
          charges equivalent to Rent reserved in this Lease for the remainder of
          the Term over the then reasonable rental value of the Demised Premises
          for  the  remainder  of  the  Term,  all of  which  amounts  shall  be
          immediately due and payable by the Tenant to the Landlord.

BANKRUPTCY

10.2           If the  Term  hereby  granted  shall  be at any  time  seized  or
taken in  execution  or in  attachment  by any  creditor of the Tenant or if the
Tenant  shall make any  assignment  for the  benefit of  creditors,  or becoming
bankrupt or insolvent shall take the benefit of any Act that may be in force for
bankrupt  or  insolvent  debtors,  or if the Tenant  should  abandon the Demised
Premises  then in any such  case  the  said  Term  shall  at the  option  of the
Landlord,  immediately  become  forfeited and void and the then current  month's
Rent and Rent for the three months next following shall  immediately  become due
and  payable  and in such case it shall be lawful for the  Landlord  at any time
thereafter to re-enter into or upon the Demised  Premises,  or any part thereof,
and the same to have again, repossess and enjoy as of its former estate anything
herein contained to the contrary notwithstanding, and neither this Lease nor any
interest  therein nor any estate  created  hereby  shall pass to or enure to the
benefit of any trustee in  bankruptcy  or any  receiver or any  assignee for the
benefit of  creditors  or  otherwise  by  operation  of law. For the purposes of
section  65.2(3)(a) of the  BANKRUPTCY  AND  INSOLVENCY  ACT (Canada) the Tenant
acknowledges  that the six months rent referred to therein shall mean six months
Rent hereunder  calculated  from the date on which the repudiation of this Lease
takes effect pursuant to such Act.

WAIVER OF EXEMPTION FROM DISTRESS

10.3           In  consideration of the premises and of the  leasing and letting
by the  Landlord  to the  Tenant of the  Demised  Premises  for the Term  hereby
created  (and it is upon that  express  understanding  that these  presents  are
entered  into),  notwithstanding  anything  contained  in any  Statute or in any
Statute  which may  hereafter  be passed,  none of the goods or  chattels of the
Tenant at any time  during the  continuance  of the Term  hereby  created on the
Demised  Premises  shall be exempt from levy by distress  for Rent in arrears by
the Tenant as provided  for in any such Statute or any  amendment or  amendments
thereto  upon any  claim  being  made for such  exemption  by the  Tenant  or on
distress  being made by the Landlord  this covenant and agreement may be pleaded
as an estoppel against the Tenant in any action brought to test the right to the
levying  upon any such  goods as are named as  exempted  in any such  Statute or
amendment or amendments  thereto;  the Tenant waives, as the Tenant hereby does,
all and every  benefit  that could or might have accrued to the Tenant under and
by virtue of any such  statute or any  amendment or  amendments  thereto but for
this covenant.


                                       26

<PAGE>

FOLLOW CHATTELS

10.4      In case of removal by the Tenant  of the goods and  chattels  of the 
Tenant from the Demised  Premises,  the Landlord may follow the same for 30 days
or such longer period of time as may be permitted by law.

OVERLOOKING AND CONDONING

10.5      Any  condoning,  excusing or  overlooking  by the Landlord of any
default,  breach or non-observance by the Tenant at any time or times in respect
of any covenant,  proviso or condition  herein  contained shall not operate as a
waiver of the Landlord's rights hereunder in respect of any subsequent  default,
breach or non-observance nor as to defeat or affect in any way the rights of the
Landlord   hereunder   in  respect  of  any   subsequent   default,   breach  or
non-observance.

                                   ARTICLE 11

                                  SUBORDINATION

SUBORDINATION

11.1      The Tenant covenants and agrees with the Landlord that the Tenant
shall from time to time upon the written request of the Landlord,  enter into an
indenture:

         (a)  subordinating the Term hereby demised and the rights of the Tenant
         hereunder to any mortgage, including any deed of trust and mortgage and
         all indentures  supplemental  thereto, or any ground lease,  present or
         future,  which includes the Demised  Premises;  or at the option of the
         Landlord

         (b) agreeing  that the Term hereby  demised  shall be prior to any such
         mortgage,  including any deed of trust and mortgage and all  indentures
         supplemental thereto, or ground lease,

provided  if the Tenant  fails to execute  any such  indenture  with  reasonable
promptness  upon  request  by  the  Landlord,   the  Tenant  hereby  irrevocably
authorizes  and appoints the Landlord as its attorney to execute the same on the
Tenant's  behalf.  Notwithstanding  any such  postponement or  subordination  as
aforesaid,  the Tenant agrees that its obligations under this Lease shall remain
in full  force and  effect  notwithstanding  any  action at any time  taken by a
mortgagee  or head  landlord  of the Lands or any part  thereof to  enforce  the
security of any such mortgage,  including any deed of trust and mortgage and all
indentures  supplemental thereto, or ground lease; PROVIDED ALWAYS however, that
any  postponement or  subordination  given hereunder shall reserve to the Tenant
the right to continue in possession of the Demised  Premises  under the Terms of
this Lease so long as the Tenant shall not be in default hereunder.


                                       27

<PAGE>

                                   ARTICLE 12
                                     NOTICES

NOTICES

12.1       Any notice,  advice,  document or writing  required or  contemplated 
by any provision hereof shall be given in writing and if to the Landlord, either
delivered personally or transmitted by facsimile to an officer of the Landlord's
agent,  PPM Real  Estate  Managers  (Canada)  Limited or mailed by prepaid  mail
addressed to the Landlord care of PPM Real Estate Managers  (Canada)  Limited at
the following address:

         PPM Real Estate Managers (Canada) Limited
         440 - 1090 West Georgia Street
         Vancouver, British Columbia
         V6E 3V7

         (facsimile number: (604) 682-5425)

with a copy to:

         PPM Real Estate Managers (Canada) Limited
         1200, 141 Adelaide Street West
         Toronto, Ontario
         M5H 3L9

         (facsimile number: (416) 362-1431)

         Attention:  Senior Vice-President

and if to the  Tenant,  either  delivered  personally  to the  Tenant  (or to an
officer of the Tenant,  if a corporation) or mailed by prepaid mail addressed to
the Tenant at the Demised  Premises,  or if an address of the Tenant is shown in
the description of the Tenant above, to such address. Every such notice, advice,
document  or  writing  shall  be  deemed  to  have  been  given  when  delivered
personally,  upon the usual  confirmation of transmission and receipt if sent by
facsimile, or if mailed as aforesaid, upon the fifth day after being mailed save
and except in the event of a labour dispute or other disruption affecting postal
service  occurring within five days of the date of mailing in which event notice
will not be deemed to have been received until actually  received.  The Landlord
may from time to time by notice  in  writing  to the  Tenant  designate  another
address as the address to which  notices are to be mailed to it, or specify with
greater  particularity  the address and persons to which such  notices are to be
mailed and may require that copies of notices be sent to an agent  designated by
it. The Tenant may, if an address of the Tenant is shown in the  description  of
the  Tenant  above,  from  time to time by notice in  writing  to the  Landlord,
designate  another  address as the address to which  notices are to be mailed to
it, or specify with greater  particularity the address to which such notices are
to be mailed.


                                       28

<PAGE>


                                   ARTICLE 13

                            MISCELLANEOUS PROVISIONS

UNAVOIDABLE FAILURES OR DELAYS

13.1      Notwithstanding  anything  to the  contrary in the Lease contained, if
either party hereto shall be bona fide delayed or hindered in or prevented  from
the  performance  of any term,  covenant or act required  hereunder by reason of
strikes, labour troubles inability to procure materials or services,  failure of
power,  restrictive  governmental  laws  or  regulations,  riots,  insurrection,
sabotage,  rebellion,  war, act of God, or other reason whether of a like nature
or not,  not the fault of the party  delayed  in  performing  work or doing acts
required  under  the  terms  of this  Lease,  then  performance  of such  terms,
covenants  or acts shall be extended  for a period  equivalent  to the period of
such delay.  The  provisions of this  paragraph  shall not operate to excuse the
Tenant from the prompt  payment of Basic  Rent,  Additional  Rent,  or any other
amounts which it is required by the terms of this Lease to pay.  This  paragraph
shall not be construed to include in the reasons for any such delays,  financial
impecuniosity or incapacity.

ENTIRE AGREEMENT

13.2      This Lease and the Schedules (including the rules and 
regulations)  attached  hereto  and  which  form part  hereof  set forth all the
covenants,  promises,  agreements,  conditions and  understandings,  between the
Landlord  and the  Tenant  concerning  the  Demised  Premises  and  there are no
covenants,  promises, agreements,  conditions or understandings,  either oral or
written,  between  them  other  than are  herein  set  forth.  Except  as herein
otherwise provided, no subsequent alteration,  amendment,  change or addition to
this Lease shall be binding  upon the  Landlord or the Tenant  unless in writing
and  signed  by each of them  except  the  rules  and  regulations  adopted  and
promulgated by the Landlord and in accordance with the provisions of this Lease.

SUBDIVISION

13.3      The Tenant will at the request of the Landlord and at no expense 
to the Tenant execute all consents, sign all subdivision plans and do all things
necessary to permit the subdivision of the Lands.

REGISTRATION

13.4      The Tenant  shall not have the right to  register  this Lease 
without the prior consent of the Landlord,  which consent may be withheld in the
Landlord's  sole  discretion,  and the Landlord  shall not be obliged to deliver
this  Lease  in  registrable   form.   Should  the  Landlord   consent  to  such
registration,  or should the Landlord require this Lease to be registered,  then
the  parties  shall   re-execute  this  Lease  in  registrable   form  and  such
registration  and the preparation of any plan necessary  therefore shall be done
by and at the sole cost and  expense  of the party  desiring  to  register  this
Lease.

                                       29

<PAGE>


NET LEASE INTENT

13.5      The Tenant  acknowledges  and agrees  that it is  intended  that this 
Lease  shall be a  completely  carefree  net  lease for the  Landlord  except as
expressly  herein set out and that the Landlord shall not be responsible  during
the Term  hereof  for any costs,  charges,  expenses  and  outlays of any nature
whatsoever  arising  from or relating to the Demised  Premises,  or the contents
thereof and without  limiting the generality of the foregoing,  the Tenant shall
be liable for the  payment of all  charges,  impositions  and  expenses of every
nature and kind  relating to the Demised  Premises and the contents  thereof and
its  Proportionate  Share of all  charges,  impositions,  and  expenses of every
nature and kind relating to those parts of the  Building,  Project and Lands not
intended for leasing and the Tenant covenants with the Landlord accordingly.

TIME OF ESSENCE

13.6      Time shall be of the essence of this Lease.

BINDING EFFECT

13.7      This Lease and everything  herein contained shall enure to the benefit
and be binding upon the heirs, executors,  administrators,  successors,  assigns
and  other  legal  representatives,  as the case  may be of each of the  parties
hereto,  subject to the  granting  of consent by the  Landlord  as  provided  in
paragraph 8.1 to any assignment or sublease.

RELOCATION OF DEMISED PREMISES

13.8      DELETED.


IN WITNESS WHEREOF the parties hereto have executed this Lease as of the day and
year first above written.

The Corporate Seal of                      )
2725321 CANADA INC.                        )
was affixed in the presence of:            )
                                           )
/s/ Mary B. Aubrey                         )
- -----------------------                    )                        C/S
Mary B. Aubrey                             )
Vice President                             )
                                           )
/s/ Paul A. Brundage                       )
- -----------------------                    )
Paul A. Brundage                           )
Vice President                             )


                                       30

<PAGE>

The Corporate Seal of APPLIED              )
DIGITAL ACCESS - CANADA, INC.              )
was affixed in the presence of:            )
                                           )
/s/ James L. Keefe                         )
- -----------------------                    )                        C/S
James L. Keefe, Chief Financial Officer    )
                                           )
                                           )
                                           )
- -----------------------                    )
Authorized Signatory                       )


                                       31

<PAGE>





                                  SCHEDULE "A"

Referred to in the attached Lease made as of January 1, 1997 between 2725321 
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


The Demised  Premises are that part of the Building situate on the Lands legally
described in Schedule  "B" hereto.  The Demised  Premises are shown  outlined in
heavy black line on the sketch plan attached to this Schedule "A".

The Demised  Premises  shall exclude the outside face of all perimeter  walls of
the Demised Premises but shall include windows and doors in the perimeter wall.

In  calculating  the  Area  of  the  Demised  Premises  or of the  Building  the
calculation  shall be computed by  measuring  from the  exterior  surface of the
Building,  in the case of exterior  walls,  and to the centre of partitions that
separate the Demised Premises from adjoining  rentable areas or Common Areas and
Facilities.  There shall be no deduction for vestibules or other recesses inside
the building line or for columns, ducts, projection or other structural elements
necessary to the  Building.  The Demised  Premises  includes all  installations,
fixtures, furnishings and amenities located within the Demised Premises.

The Area of the Demised  Premises is hereby  estimated to be 25,604 square feet,
provided the Landlord may have the Area of the Demised Premises  measured by its
architect  or engineer,  and if the same is different  from the figure set forth
above then Basic Rent and the  Tenant's  Proportionate  Share  shall be adjusted
accordingly, such adjustment to be retroactive to the Commencement Date.



<PAGE>




                        [ATTACH SKETCH PLAN OF BUILDING]


            [NOTE: OUTLINE THE DEMISED PREMISES IN HEAVY BLACK LINE]



<PAGE>



                                  SCHEDULE "B"

Referred to in the attached Lease made as of January 1, 1997 between 2725321
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


LEGAL DESCRIPTION OF LANDS

                  Lots A and B
                  District Lot 10
                  Group 1, New Westminster District
                  Plan 72477

MUNICIPAL ADDRESS OF DEMISED PREMISES

                  8630 - 8654 Commerce Court
                  Burnaby, B.C.
                  V5A 4N6



<PAGE>



                                  SCHEDULE "C"

Referred to in the attached Lease made as of January 1, 1997 between 2725321 
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


                              RULES AND REGULATIONS

1.   Tenants  shall  not  burn any  trash or  garbage  in or about  the  Demised
     Premises or anywhere within the confines of the Lands.

2.   Tenants shall not keep or display any merchandise on or otherwise  obstruct
     any part of the Lands except as is specifically permitted in this Lease.

3.   Floors shall not be overloaded.

4.   All loading and unloading of  merchandise,  supplies,  materials,  garbage,
     refuse and other  chattels  shall be made only  through or by means of such
     doorways as the Landlord shall designate in writing from time to time.

5.   Tenants  shall in  connection  with their  advertising  in  relation to the
     business  carried  on in the  Demised  Premises  use and  promote  the name
     IMPERIAL  SQUARE LAKE CITY or such other name as the Landlord may from time
     to time  designate  and in  using  such  name in any  advertisement,  sign,
     poster,  printing or other writing  tenants will print,  write or designate
     the same in a manner to be determined from time to time by the Landlord and
     in no other  manner.  Tenant  shall  not use  such  name in  regard  to any
     business other than their business upon the Demised Premises. Tenants agree
     that they will not carry on or permit to be carried on any  business in the
     Demised Premises under a name or style other than their own name or call or
     permit the Demised Premises or any business carried on therein to be called
     any name other than their own name,  without the prior  written  consent of
     the Landlord.

6.   Tenants  shall,  upon written  notice from the  Landlord,  within five days
     furnish the  Landlord  with the current  Provincial  License  Number of any
     vehicle owned or used by employees of tenants.

7.   Tenants  shall not bring upon their  premises any  equipment,  motor or any
     other thing which may damage the Building or the Project.

8.   No  merchandise,  supplies,  materials,  garbage,  refuse or other chattels
     shall be  allowed  to remain on any  common  area,  and must at all time be
     contained within the Demised Premises.

9.   The  Tenant  shall not use or occupy in any manner  whatsoever  the area of
     recess,  if any,  between  the lease line of the Demised  Premises  and the
     store front of the Demised  Premises,  and the Landlord reserves the entire
     control over such area.

<PAGE>



10.  Wherever any window area is not used for the purpose of entrances,  offices
     or show areas, the Tenant must construct at its own expense,  enclosures or
     decorative  screens as  specified  and approved by the  Landlord,  so as to
     protect the windows in that area from damage.

11.  If any  additional  locks or bolts of any kind shall be placed  upon any of
     the doors or windows of the Demised  Premises,  or if any changes  shall be
     made in existing locks or mechanisms thereof,  the Tenant shall provide the
     Landlord with a duplicate key or keys so as to allow the Landlord access to
     the Demised  Premises as and when required.  The Tenant shall at the end of
     the Term or renewal  term as the case may be,  return to the  Landlord  all
     keys to the Demises  Premises and to all other areas of the Building or the
     Project which may have been supplied to the Tenant.

12.  No animals or motor vehicles shall be brought into the Demised  Premises or
     the Building.

13.  DELETED.

14.  The doors and windows or other apertures that reflect or admit light or air
     into the  passageways  or into any portion of the  Demised  Premises or the
     Building  shall not be  covered or  obstructed  by the Tenant in any manner
     whatsoever.

15.  Windows shall not be left open so as to admit rain or snow.

16.  It shall be the  responsibility  of the Tenant to prevent  any person  from
     throwing  objects  out of  windows or into the ducts or  stairwells  of the
     Demised  Premises or the  Building,  and the Tenant shall pay for any cost,
     damage or injury resulting from any such act or acts.

17.  Keys or other  devices  which  are made  available  to the  Tenant  for the
     purpose of providing access to the exterior doors of the Building shall not
     be  duplicated  and shall be  returned  to the  Landlord  immediately  upon
     termination of this Lease.

The  foregoing  rules  and  regulations  as from time to time  amended,  are not
necessarily  of  uniform  application  but may be  waived in whole or in part in
respect of other tenants without affecting their  enforceability with respect to
the Tenant or the  Demised  Premises.  For the benefit and welfare of all or any
tenants  of  premises  upon the  Lands as it may exist  from  time to time,  the
Landlord  shall have the right to issue further Rules and  Regulations  and such
further Rules and Regulations shall thereupon be binding on all tenants.

                                       2

<PAGE>



                                  SCHEDULE "D"

Referred to in the attached Lease made as of January 1, 1997 between 2725321 
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


                              HAZARDOUS SUBSTANCES

DEFINITIONS

1.              In this Schedule "D":

"HAZARDOUS SUBSTANCE" means:

               (a) any radioactive material;

               (b) any explosive;

               (c) any substance  that, if added to any water,  would degrade or
               alter or form part of a process of  degradation  or alteration of
               the quality of that water to the extent that it is detrimental to
               its use by man or by any animal, fish or plant;

               (d) any solid, liquid, gas or odour or combination of any of them
               that, if emitted into the air,  would create or contribute to the
               creation of a condition of the air that:

                   (i) endangers the health, safety or welfare of persons
                    or the health or animal life;

                   (ii) interferes with normal enjoyment of life or property; or

                   (iii) causes damage to plant life or to property;
       
               (e) any toxic substance;

               (f) any  substance  declared to be  hazardous  or toxic under any
               Law,  Regulation  or Order (as  defined  below) now or  hereafter
               enacted  or  promulgated  by any  governmental  authority  having
               jurisdiction over the Landlord,  the Tenant, the Demised Premises
               or the Development of which the Demised Premises form a part; and


               (g)  any  other  substance  which  is or  may  become  hazardous,
               dangerous or toxic to persons or property;

"LAWS" means all applicable  federal,  provincial,  state,  municipal,  or local
laws, by-laws,  statutes,  or ordinances,  including,  without  limitation,  the
following: the Canadian ENVIRONMENTAL PROTECTION ACT, the British Columbia WASTE
MANAGEMENT  ACT  and  other   applicable  laws  relating  to  the   environment,
occupational safety, product liability and transportation;


<PAGE>


"REGULATIONS"  mean all  rules,  regulations  or the like  promulgated  under or
pursuant to any Laws; and

"ORDERS"  mean all  applicable  orders,  decisions,  or the like rendered by any
ministry, department or administrative or regulatory agency.

TENANT'S COVENANT AS TO USE

2.        Without  limiting the generality of the covenants of the Tenant in the
Lease contained,  the Tenant covenants and agrees that the Tenant will not bring
upon the Demised Premises or any part thereof any Hazardous Substances and if at
any time,  notwithstanding the foregoing covenant of the Tenant,  there shall be
any Hazardous  Substances upon the Demised Premises or a part thereof whether or
not brought thereupon by the Tenant, the Tenant shall, at its own expense:


         (a)  immediately  give the Landlord  notice  specifying  the nature and
         location of the Hazardous  Substances and thereafter  give the Landlord
         from  time to time  written  notice  of the  extent  and  nature of the
         Tenant's compliance with the following provisions of this paragraph;

         (b) promptly remove the Hazardous  Substances from the Demised Premises
         in a manner  which  conforms  with all  Laws,  Regulations  and  Orders
         governing the movement of the same and the reasonable  requirements  of
         the Landlord in connection with the movement; and

         (c) if  requested  by the  Landlord,  obtain at the  Tenant's  cost and
         expense from an  independent  consultant  designated or approved by the
         Landlord  verifying  the complete and proper  removal  thereof from the
         Demised  Premises  or,  if such is not the  case,  reporting  as to the
         extent  and  nature  of  any  failure  to  comply  with  the  foregoing
         provisions of this paragraph.

COMPLIANCE WITH LAWS

3.        Without  limiting the generality of the covenants of the Tenant in the
Lease contained,  the Tenant shall, at its own cost and expense, comply with all
Laws,  Regulations  and  Orders  from  time  to time in  force  relating  to the
Landlord,  the Tenant,  the business of the Tenant,  the Demised Premises or the
Development   relating  to  Hazardous  Substances  and  the  protection  of  the
environment  and shall  immediately  give written  notice to the Landlord of the
occurrence of any event in the Demised  Premises or on the Development  which is
in breach of any such Laws,  Regulations  or Orders or a  contravention  thereof
and, if the Tenant shall,  either alone or with others,  cause the occurrence of
such event, the Tenant shall, at its own expense:

                                       2


<PAGE>


         (a)  immediately  give the Landlord  notice of the  occurrence  and the
         contravention  and  thereafter  give  the  Landlord  from  time to time
         written notice of the extent and nature of the Tenant's compliance with
         the following provisions of this paragraph;

         (b)  promptly remedy the contravention in a manner which conforms with
         all Laws, Regulations and Orders  governing the movement  of the same;
         and

         (c) if  requested  by the  Landlord,  obtain at the  Tenant's  cost and
         expense from an  independent  consultant  designated or approved by the
         Landlord   verifying   the  complete   and  proper   remedying  of  the
         contravention  or, if such is not the case,  reporting as to the extent
         and nature of any failure to comply with the  foregoing  provisions  of
         this paragraph.

The Tenant shall, at its own expense,  remedy any damage to the Demised Premises
and the Development  caused by such event within the Demised  Premises or by the
performance of the Tenant's obligations under this paragraph as a result of such
occurrence.  If the Tenant fails to do so, the Landlord may at its option remedy
the damage, and may recover its cost and expenses of so doing from the Tenant as
Additional Rent under the Lease.

If any governmental  authority having jurisdiction shall require the clean-up of
any Hazardous Substances held, released,  spilled,  abandoned or placed upon the
Demised  Premises or the  Development  or released into the  environment  by the
Tenant in the course of the Tenant's business or as a result of the Tenant's use
or occupancy of the Demised Premises, then the Tenant shall, at its own expense,
prepare  all  necessary  studies,  plans and  proposals  and submit the same for
approval,  provide  all  bonds  and  other  security  required  by  governmental
authorities  having  jurisdiction and carry out the work required and shall keep
the Landlord  fully informed and provide to the Landlord full  information  with
respect  to the  proposed  plans  and  comply  with  the  Landlord's  reasonable
requirements  with respect to such plans. The Tenant agrees that if the Landlord
determines,  in its own  discretion,  that the  Landlord,  its  property  or its
reputation is placed in any jeopardy by the  requirement  for any such work, the
Landlord  may  itself  undertake  such work or any part  thereof at the cost and
expense of the Tenant.

ENQUIRIES BY LANDLORD

4.        The Tenant hereby authorizes the Landlord to make enquiries from time
to time of any  government or  governmental  agency with respect to the Tenant's
compliance with any and all laws and regulations  pertaining to the Tenant,  the
Tenant's business and the Demised Premises  including  without  limitation Laws,
Regulations and Orders pertaining to Hazardous  Substances and the protection of
the  environment;  and the Tenant covenants and agrees that the Tenant will from
time to time provide to the Landlord such written  authorization as the Landlord
may reasonably require in order to facilitate the obtaining of such information.
Without  limiting the generality of the  foregoing,  the Landlord shall have the
right,  during  the  last  3  months  of  the  Term,  to  cause  an  independent
environmental  audit or assessment of the Demised Premises or the Building to be
performed, and if such audit or assessment indicates

                                       3

<PAGE>




the  presence of  Hazardous  Substances  the Tenant  shall bear the cost of such
audit  or  assessment,   together  with  the  cost  of  the  clean-up,  removal,
containment, treatment, detoxification or neutralization, as the case may be, of
such Hazardous Substances.

EVENT OF DEFAULT

5.        The presence of  any Hazardous Substances in the Demised  Premises 
without the prior written  approval of the Landlord shall be considered to be an
event of default for the purposes of the Lease.

OWNERSHIP OF HAZARDOUS SUBSTANCES

6.        If the Tenant  shall  bring or create  upon the  Development  or the 
Demised  Premises  any  Hazardous  Substance  or if the conduct of the  Tenant's
business shall cause thereto be any Hazardous  Substance upon the Development or
the Demised Premises then, notwithstanding any rule of law to the contrary, such
Hazardous  Substance shall be and remain the sole and exclusive  property of the
Tenant and shall not become the property of Landlord  notwithstanding the degree
of affixation of the Hazardous  Substance or the goods  containing the Hazardous
Substance to the Demised  Premises or the  Development and  notwithstanding  the
expiry or earlier termination of this Lease.

SURVIVAL OF COVENANTS

7.        The  obligations  of the Tenant  hereunder  relating to Hazardous  
Substances  shall survive the expiry or earlier  termination  of this Lease save
only that,  to the extent that the  performance  of those  obligations  requires
access to or entry upon the  Demised  Premises  or the  Development  or any part
thereof, the Tenant shall have such entry and access only at such times and upon
such terms and conditions as the Landlord may from time to time specify; and the
Landlord  may,  at the  Tenant's  cost and  expense,  itself  or by its  agents,
servants, employees,  contractors and subcontractors,  undertake the performance
of any necessary work in order to complete such  obligations of the Tenant;  but
having  commenced such work, the Landlord shall have no obligation to the Tenant
to complete such work.

                                       4


<PAGE>

                                  SCHEDULE "E"


Referred to in the attached Lease made as of January 1, 1997 between 2725321 
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


                               INDEMNITY AGREEMENT

THIS AGREEMENT made as of January 1, 1997,

BETWEEN:

             APPLIED DIGITAL ACCESS, INC., 9855 Scranton Road, San Diego, 
             ----------------------------
             California, U.S.A.  92121


             (hereinafter called the "Covenantor")

AND:

             2725321 CANADA INC., c/o PPM Real Estate Managers (Canada) Limited,
             -------------------
             1090 West Georgia Street, Vancouver, B.C.  V6E 3V7.


             (hereinafter called the "Landlord")


In consideration  of the Landlord  entering into the lease (the "Lease") made as
of January 1, 1997  between the Landlord  and APPLIED  DIGITAL  ACCESS - CANADA,
INC. (the  "Tenant") and of other good and valuable  consideration,  the receipt
and  sufficiency  of  which  is  hereby  acknowledged  by  the  Covenantor,  the
Covenantor hereby represents and warrants to the Landlord that it is financially
interested  in the  affairs  of the  Tenant and  covenants  and agrees  with the
Landlord as follows:

1.        The Covenantor is financially interested in the affairs of the Tenant,
and the granting of this  Indemnity  Agreement  is in the best  interests of the
Covenantor.

2.        The Covenantor shall indemnify and save harmless the Landlord in 
respect of any default by the Tenant in the  carrying  out of each and every one
of the Tenant's covenants and agreements in the Lease set out.

3.        If any default is made by the Tenant under the Lease the Covenantor 
shall on demand of the Landlord forthwith remedy such default.

4.        The Covenantor shall indemnify and save harmless the Landlord with 
respect to all losses, costs, expenses, claims, liabilities and damages that may
be suffered or incurred by the Landlord by reason of or relating to, directly or
indirectly, any default by the Tenant under the Lease.


<PAGE>


5.        This indemnity is absolute and unconditional.

6.        The Landlord shall not be bound or required to proceed  against the 
Tenant or any  other  obliged  person  or to have  recourse  to or  exhaust  any
security  from time to time held by it for the  performance  of the covenants or
agreements  of the Tenant in the Lease  contained  or to pursue any other remedy
whatsoever which may be available to the Landlord before proceeding  against the
Covenantor.

7.        The  obligations of the Covenantor  under this Agreement  shall extend
to the Term of the Lease and any overholding by the Tenant and to any renewal or
extension of the Term of the Lease, whether such renewal or extension is entered
into by the Tenant or by an assignee of the Tenant.

8.        No proceeding  under this  Agreement and no recovery made as a result
thereof  will  be a bar  or a  defence  to any  further  proceeding  under  this
Agreement.

9.        The  Covenantor  waives  the right to  receive  notice of any  default
by the Tenant under the Lease.

10.       The obligations of the Covenantor under this Agreement shall in no way
be released, discharged, reduced or otherwise affected by:

          (a)  modifications,  releases or  discharges  granted to the Tenant in
          respect of its  obligations to keep,  observe or perform its covenants
          and agreements under the Lease;

          (b) any agreement or other dealing between the Landlord and the Tenant
          having the effect of amending or altering the Lease or the obligations
          of the Tenant thereunder;

          (c) any neglect,  delay or  forbearance  of the Landlord in demanding,
          requiring or enforcing the keeping,  observance or  performance by the
          Tenant of any of its covenants or agreements under the Lease or by the
          Covenantor of any of its obligations under this Agreement;

          (d) granting any extension of time, waivers, or indulgences;

          (e) any  assignment  of the Lease or  subletting  by the Tenant or any
          trustee in bankruptcy,  receiver or other  successor or any consent of
          the Landlord to any assignment or subletting;

          (f)  bankruptcy,  insolvency  or  dissolution  of  the  Tenant  or the
          Covenantor;

          (g) any other  compromising,  modifying  or  releasing of the Tenant's
          obligations  under the Lease  through the  operation of any statute or
          law;

                                       2

<PAGE>

          (h) any event or  occurrence  which  would  have the  effect at law of
          terminating or rendering  unenforceable any covenants or agreements of
          the Tenant in the Lease contained or of the Covenantor hereunder;

          (i) any failure by the  Landlord to give notice to the  Covenantor  of
          any default by the Tenant under the Lease;

          (j) any re-entry by the Landlord onto the premises  demised under,  or
          termination of, the Lease;

          (k) any change in the constitution of the Tenant, if a partnership; or

          (l)  any  other  matter,  thing,  act  or  omission  of  the  Landlord
          whatsoever.

11.        Without  limiting the generality of the foregoing,  the Covenantor 
shall be bound by the terms and  provisions  of the Lease in the same  manner as
though the Covenantor were the tenant named in the Lease.

12.       Except in the case of a surrender accepted by the Landlord,  if the 
lease is terminated,  or if the Lease is disclaimed  pursuant to any statute, or
if the Lease is  repudiated  by the Tenant  pursuant  to the  provisions  of the
BANKRUPTCY  AND  INSOLVENCY  ACT (Canada),  then and in any of such cases at the
option of the Landlord to be  exercised  at any time within 6 months  thereafter
the  Covenantor  shall  execute and deliver a new lease of the premises  demised
under the Lease  between the Landlord as landlord and the  Covenantor  as tenant
for a term equal in duration  to the residue of the Term of the Lease  remaining
unexpired   immediately  prior  to  the  effective  date  of  such  termination,
disclaimer or repudiation.  Such new lease shall contain the same landlord's and
tenant's  obligations  respectively  and the  same  covenants,  obligations  and
agreements,  terms and  conditions  in all respects  (including  the proviso for
re-entry) as are contained in the Lease. If the Covenantor  fails to execute and
deliver  a new  lease as  aforesaid,  the  Covenantor  shall be  deemed  to have
executed and delivered the same.

13.       The benefit of the Covenantor's covenants  herein may,  from time to 
time, be assigned, collaterally, conditionally or otherwise, to any other entity
to whom the Landlord  assigns the benefits of the Lease and such other  assignee
shall be entitled to enforce the  provisions  hereof  against the  Covenantor as
though  such  assignee  were the  original  contracting  party  hereto  with the
Covenantor.

14.       This  Agreement  shall  extend to and be binding  upon the Covenantor,
its heirs, executors, administrators,  successors and assigns and shall enure to
the benefit of and may be enforced by the Landlord,  its  successors and assigns
and any  mortgagee,  chargee,  or other  encumbrancer  of all or any part of the
premises demised under the Lease.

15.  This  Agreement  shall  be  construed  in  accordance  with the laws of the
Province of British Columbia.

                                       3


<PAGE>

IN WITNESS  WHEREOF this Agreement has been executed by the Covenantor as of the
day and year first above written.

The Corporate Seal of APPLIED               )
DIGITAL ACCESS, INC.                        )
was hereunto affixed in the presence of:    )
                                            )
                                            )                 C/S
- ---------------------------------------     )      
                                            )      
                                            )      
- ---------------------------------------     )      
                                            )


                                       4

<PAGE>



                                  SCHEDULE "F"

Referred to in the attached Lease made as of January 1, 1997 between 2725321 
CANADA INC. as Landlord, and APPLIED DIGITAL ACCESS - CANADA, INC. as Tenant.


                               SPECIAL PROVISIONS


1.  EXTENSION  OF TERM -  Provided  the  Tenant  has not been in  default in the
performance of its obligations pursuant to the Lease, and provided the Tenant is
Applied  Digital Access - Canada,  Inc. and is itself in possession of the whole
of the  Demised  Premises  or has  sublet  the  Demised  Premises,  or a portion
thereof,  in accordance with the Lease, the Tenant will have the right to extend
the Term,  upon giving the Landlord  notice of its intention to do so no earlier
than March 31, 1999 and no later than June 30, 1999, for a further period of two
years (the "Extended Term") upon the same terms and conditions as are set out in
the Lease, except that:

         (a)      there will be no further right to extend the Term following 
         the expiration of the Extended Term;

         (b) any requirement on the Landlord's part to do any Landlord's Work or
         pay to the Tenant any construction allowance, inducement, loan or other
         amount in  connection  with the Lease or  improvements  in the  Demised
         Premises,  and any right of first  refusal,  will not apply  during the
         Extended Term; and

         (c) the annual  Basic Rent shall be mutually  agreed  upon  between the
         Landlord  and the Tenant  based upon the current  market Basic Rent for
         comparably  sized and  improved  premises in similar  buildings  in the
         area,  as  designated  by the Landlord as at October 1, 1999,  provided
         that the annual Basic Rent for the Extended Term shall not be less than
         the annual  Basic Rent  payable by the Tenant for the last 12 months of
         the initial Term,  and provided  further that if the parties are unable
         to agree to such  annual  Basic  Rent by no later than 30 days prior to
         the expiry of the  initial  Term,  then the annual  Basic Rent shall be
         determined by arbitration in accordance with the COMMERCIAL ARBITRATION
         ACT of British  Columbia as then in force and applying the criteria set
         out above.  If the annual  Basic  Rent has not been  determined  by the
         commencement  of the Extended  Term, the Tenant shall pay Basic Rent at
         the rate applicable to overholding as set out in the Lease,  and within
         10 days after the Basic Rent for the Extended Term is  determined,  the
         parties  shall  retroactively  adjust  the Basic  Rent  owing  from the
         commencement of the Extended Term.

If the Tenant  fails to exercise  this  option to extend the Term in  accordance
with the  foregoing,  or if the foregoing  conditions  are not  satisfied,  this
option to extend shall be null and void.

2.  AVAILABLE SPACE - The Landlord shall  undertake to use reasonable efforts to
keep the Tenant  informed on the  availability  of any space available for lease
direct from the Landlord in the Building.  Notwithstanding  the  foregoing,  the
failure  by the  Landlord  to so inform  the  Tenant  shall not give rise to any
liability whatsoever to the Tenant on the part of the Landlord.


<PAGE>


3.  ACCESS - the Tenant  shall have  access to the Demised Premises 24 hours per
day each and every day of the year  throughout  the Term,  except for unforeseen
Building  emergencies,  and subject to the Landlord's security  procedures.  The
Tenant  shall  have the right to have  heating,  ventilating,  air-conditioning,
hydro and elevator  service as it may require  outside of normal business hours,
upon reasonable  request and any reasonable cost(s) related thereto shall be the
Tenant's responsibility.

4.  PARKING - So long as the Tenant is Applied Digital Access - Canada, Inc. and
is itself in occupation  of the whole of the Demised  Premises or has sublet the
Demised  Premises,  or a portion  thereof,  in  accordance  with the Lease,  and
provided  the  Tenant  has  not  been  in  default  in  the  performance  of its
obligations  pursuant to the Lease,  the  Landlord  will make  available  to the
Tenant for its use 51 reserved parking spaces identified by the Tenant's name in
a location to be  designated by the Landlord from time to time at no cost to the
Tenant throughout the Term or any extension thereof.

5.  FREE  BASIC  RENT -  Provided  the  Tenant is in  possession  of the Demised
Premises,  has executed the Lease and is not in default  thereunder,  the Tenant
shall  not be  required  to pay  Basic  Rent for the  first  month of the  Term,
provided  the Tenant  shall pay all  Additional  Rent  provided for in the Lease
throughout such period.

                                       2


<PAGE>


                                    I N D E X

ARTICLE               DESCRIPTION                                           PAGE
- -------               -----------                                           ----



ARTICLE 1             DEFINITIONS AND INTERPRETATION

       1.1            Definitions............................................1
       1.2            Schedules..............................................4
       1.3            Governing Law..........................................4
       1.4            Headings...............................................4
       1.5            Interpretation.........................................4
       1.6            Use of "herein", "hereof", etc.........................5
       1.7            Terms as Covenants.....................................5

ARTICLE 2             DEMISE, TERM AND USE

       2.1            Demise.................................................5
       2.2            Term...................................................5
       2.3            Use....................................................5
       2.4            Use of common areas and facilities, etc................6
       2.5            Possession.............................................6
       2.6            Examination of Demised Premises........................6
       2.7            Overholding............................................6

ARTICLE 3             RENT AND OTHER PAYMENTS

       3.1            Basic Rent.............................................7
       3.2            Payments to Landlord...................................7
       3.3            Additional Rent........................................7
       3.4            Payments to Others.....................................7
       3.5            Interest on Overdue Amounts............................8
       3.6            Disputes...............................................8
       3.7            Deposit................................................8

ARTICLE 4             MISCELLANEOUS COVENANTS OF THE TENANT

       4.1            Pay Rent...............................................8
       4.2            Pay Tenant's Taxes.....................................9
       4.3            Pay Utilities..........................................9
       4.4            Pay Proportionate Share of Taxes.......................9
       4.5            Pay Proportionate Share of Operating Costs.............9
       4.6            No Nuisance...........................................10
       4.7            Comply with Laws, etc.................................10
       4.8            Comply with Rules and Regulations.....................10
       4.9            Goods, Chattels, etc. Not to be removed...............11
       4.10           Use of Demised Premises...............................11
       4.11           Continuous Occupation.................................11
       4.12           Signs.................................................11
       4.13           Peaceful Surrender....................................11
       4.14           Condition at Expiration...............................12
       4.15           Removal of Fixtures...................................12
       4.16           Use of Washrooms......................................12
       4.17           Overloading...........................................12
       4.18           Nuisance and Waste....................................13

<PAGE>


ARTICLE               DESCRIPTION                                           PAGE
- -------               -----------                                           ----

       4.19           Access................................................13
       4.20           Use of Yard Areas.....................................13
       4.21           No Auction............................................13
       4.22           Estoppel Certificates.................................13
       4.23           Landlord May Perform Tenant's Covenants...............14

ARTICLE 5             LANDLORD'S COVENANTS

       5.1            Quiet Enjoyment.......................................14
       5.2            Taxes.................................................14
       5.3            Management, Operation and Maintenance.................14

ARTICLE 6             INSURANCE AND INDEMNITY

       6.1            Tenant Insurance......................................15
       6.2            Details of Policies...................................15
       6.3            Proof of Insurance....................................16
       6.4            Priority of Claims....................................16
       6.5            Acts Conflicting with Insurance.......................16
       6.6            Indemnity to the Landlord.............................16
       6.7            Further Indemnity.....................................17
       6.8            Landlord not Responsible for Injuries, Loss, Damage...17
       6.9            No Liability for Indirect Damages.....................17
       6.10           Landlord Insurance....................................18

ARTICLE 7             REPAIRS AND ALTERATIONS

       7.1            Repairs...............................................18
       7.2            Alterations...........................................19
       7.3            Notice of Accidents, Defects, etc.....................20
       7.4            Care of Demised Premises..............................20
       7.5            Landlord's Right to do Work...........................21
       7.6            Landlord's Right to Inspect and Display Sign..........22
       7.7            Landlord's Repairs....................................23

ARTICLE 8             TRANSFER AND ASSIGNMENT

       8.1            Assigning or Subletting...............................23
       8.2            No Release............................................24
       8.3            Change of Control.....................................24
       8.4            Right of Landlord to Terminate........................24
       8.5            Sale by Landlord......................................25

ARTICLE 9             DAMAGE OR DESTRUCTION

       9.1            Damage or Destruction Without Termination.............25
       9.2            Damage or Destruction with Termination................25
       9.3            Damage or Destruction of Building.....................26

<PAGE>


ARTICLE               DESCRIPTION                                           PAGE
- -------               -----------                                           ----


ARTICLE 10            DEFAULT AND RE-ENTRY

       10.1           Re-entry 26
       10.2           Bankruptcy............................................27
       10.3           Waiver of Exemption from Distress.....................27
       10.4           Follow Chattels.......................................28
       10.5           Overlooking and Condoning.............................28

ARTICLE 11            SUBORDINATION

       11.1           Subordination.........................................28

ARTICLE 12            NOTICES

       12.1           Notices  .............................................29

ARTICLE 13            MISCELLANEOUS PROVISIONS

       13.1           Unavoidable Failures or Delays........................30
       13.2           Entire Agreement......................................30
       13.3           Subdivision...........................................30
       13.4           Registration..........................................31
       13.5           Net Lease Intent......................................31
       13.6           Time of Essence.......................................31
       13.7           Binding Effect........................................31
       13.8           Relocation of Demised Premises........................32

  Schedule "A"        Demised Premises
  Schedule "B"        Legal and Municipal Descriptions
  Schedule "C"        Rules and Regulations
  Schedule "D"        Hazardous Substances
  Schedule "E"        Indemnity Agreement
  Schedule "F"        Special Provisions




<PAGE>


                                                                    EXHIBIT 11.1

                          APPLIED DIGITAL ACCESS, INC.
                          ----------------------------
                       STATEMENT REGARDING COMPUTATION OF
                          NET INCOME (LOSS) PER SHARE

                 (Amounts in thousands, expect per share data)
<TABLE>
<CAPTION>


                                                             YEAR ENDED DECEMBER 31,
                                                             -----------------------

                                                         1994           1995           1996
                                                         ----           ----           ----

<S>                                                    <C>            <C>            <C>     
Net income (loss)...........................           $10,620        $759           ($7,120)
                                                       =======        ====           ======= 


Reconciliation of weighted average
number of shares outstanding to amount
used in net income (loss) per share computation:


Weighted average number of
common share outstanding....................            10,542         11,806          12,084

Weighted average number of options and 
warrants outstanding........................             1,549          1,042             --
                                                         -----          -----           -----

Weighted average number of common shares
and common share equivalents outstanding....            12,091         12,848          12,084
                                                        ======         ======          ======

Net income (loss) per share.................             $0.88          $0.06          ($0.59)
                                                         =====          =====          ====== 
</TABLE>

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

Computational Notes:
See Note 2 to Financial Statements




<PAGE>

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

        Except for the  historical  information  contained  herein,  the matters
discussed in this Annual  Report may contain  forward-looking  statements  which
involve risk and uncertainties. Factors that may affect the Company's results of
operations are discussed in detail in "Risks and Uncertainties" below, including
but not limited to customer delays in reengineering programs,  decreased capital
expenditures   by   several   of  the   Company's   customers,   the  impact  of
reorganizations,  restructurings  and  reductions-in-force  at  several  of  the
Company's RBOC customers;  deregulation of the telecommunications  industry; and
the highly  competitive  market  surrounding the Company's CTS and NIU products.
The Company  believes that  deregulation  and the resulting  increased number of
competitors providing  telecommunications  services could result in an expansion
of the Company's customer base and increased  competition with regard to service
levels  and costs,  ultimately  causing an  increased  demand for the  Company's
products. However, additional delays in the deployment of the Company's products
and continued uncertainty surrounding the telecommunications industry may have a
material  adverse  impact  on the  Company's  business,  operating  results  and
financial  condition.  As a result of the  uncertainties  faced by the Company's
customers,  the Company  continues  to have  limited  visibility  with regard to
future  customer  orders  and the  timing of such  orders.  Customers  have been
placing  orders  quarterly and the Company has been operating in a book and ship
mode.  With a small  customer base and  fluctuating  order size,  this trend has
resulted in quarter-to-quarter  revenue fluctuations that are likely to continue
for the foreseeable  future.  While the outlook contained in any forward-looking
statements  represents  management's current judgment on the future direction of
the business,  the risks and  uncertainties  discussed herein could cause actual
results to differ materially from any future  performance  suggested herein. The
Company  undertakes  no  obligation  to revise or update  these  forward-looking
statements to reflect events or circumstances arising after the date hereof.

OVERVIEW

        In October  1996,  the U.S.  Patent and  Trademark  Office  granted  the
Company a patent for technology used in the Company's  Remote Module product,  a
unique DS1 Network Interface Unit ("NIU"). The Remote Module, when used with the
Company's  T3AS  Performance  Monitoring  and  Test  System,  and  Sectionalizer
Operations  Systems  ("OS")  software,  enables  service  providers to determine
whether circuit troubles originated in their network or the customers'.

        On July 16, 1996,  the Company  acquired  certain  assets of MPR Teltech
Ltd., ("MPR Teltech") a subsidiary of BC TELECOM,  Inc. The assets acquired were
part of MPR  Teltech's  operating  unit commonly  known as the Special  Services
Networks  division  ("SSN").  The Company and its Canadian  subsidiary,  Applied
Digital  Access - Canada,  Inc.  ("ADA-Canada"),  acquired  the  assets for $4.2
million in cash and 150,000  shares of the  Company's  common  stock.  The total
purchase  valuation was $5.3  million.  The Company also incurred $.2 million in
related  acquisition costs. SSN was an operations  systems software  development
group with  expertise in development  of network  management  systems for public
carriers.  SSN  developed  operations  systems  ("OS")  software  primarily  for
Northern  Telecom  Limited  ("Nortel").  SSN  became  part of  ADA-Canada  which
provides  development  services  related to network  performance  management  OS
software  products  for the Company and its  customers,  including  Nortel.  The
Company incurred a $2.1 million one-time charge in the third quarter of 1996 for
purchased  research  and  development  related  to  the  asset  acquisition.  In
connection with the acquisition,  the Company also licensed  certain  technology
from Nortel for Network Performance Management applications.

        On February 29, 1996,  the Company  acquired  certain  assets of Applied
Computing  Devices,  Inc.  ("ACD"),  a company  that  developed  and marketed OS
software used  primarily by  independent  telephone  companies to manage certain
functions in their networks.  The customer set and products of ACD  complemented
those of ADA, and ADA has  continued to market and enhance these  products.  The
Company acquired the assets for $1.7 million in cash and incurred  approximately
$.2 million in related  costs.  The assets were  acquired at an auction  held in
Federal  Bankruptcy  Court,  Southern  District  of  Indiana.  After  filing for
bankruptcy in September  1995,  ACD did not generate  significant  revenue.  The
Company recorded a one-time charge of approximately $1.2 million associated with
purchased  research and  development in the first quarter of 1996 as a result of
the acquisition.


                                       1

<PAGE>

        In February 1996, the settlement of a class action lawsuit filed against
the Company and two of its  officers in March 1995 was  finalized  and  received
court  approval.  The  litigation  was  settled for $1.5  million,  of which the
Company was obligated to pay  approximately  $.4 million with the remainder paid
by the Company's  directors'  and officers'  liability  insurance  carrier.  The
costs associated with the suit were accrued in 1995.

        Taking  the  developments  discussed  above and the  elements  discussed
elsewhere,  both  individually  and in the aggregate,  there can be no assurance
that the Company will maintain  current  revenue or operating  results levels or
that revenue or operating results will increase.


                                        2


<PAGE>


 RESULTS OF OPERATIONS

        The following table sets forth certain  statements of operations data as
a percent of revenue, for the years ended December 31, 1996, 1995 and 1994.

<TABLE>
<CAPTION>

                                                YEARS ENDED DECEMBER 31,
                                             1996         1995         1994
                                             ----         ----         ----
<S>                                          <C>          <C>          <C> 
Revenue................................      100%         100%         100%
Cost of revenue........................       52%          43%          42%
                                              ---          ---         ----
Gross profit...........................       48%          57%          58%

Operating Expenses:
Research and development...............       30%          28%          15%

Purchased in-process
research and
development related to                        13%           -            -
acquisitions.....
Sales and marketing....................       26%          21%           9%
General and administrative.............        5%          14%           7%
                                              ---          ---          ---
Total operating expenses...............       84%          63%          31%
                                             ----         ----         ----
Operating income (loss)................      (36)%         (6)%         27%
Other income (expense), net............        7%          10%           4%
                                              ---         ----          ---
         Income (loss) before                (29)%          4%          31%
income taxes...........................
Provision for income taxes.............        -            -           (1)%
                                              ---          ---         -----
Net income (loss)......................       (29)%         4%           30%
                                             =====          =====        ===
</TABLE>


1996 COMPARED WITH 1995

         Revenue  totaled  $24,422,000  in 1996, a 19% increase from $20,470,000
in 1995. The increase is primarily the result of revenue  generated from network
management  OS  software   design   services  and  products   acquired   through
acquisitions  during 1996. Revenue from the Company's T3AS products and services
totaled  $18,144,000  in 1996, an 11% decrease  from  $20,470,000  in 1995.  The
decrease  was the  result  of lower  T3AS  sales  compared  to last  year due to
decreased capital expenditures by several of the Company's customers, the highly
competitive  market for the Company's  CTS and NIU  products,  and the impact of
regulatory  actions on the  Company's  customers.  Revenue  from OS services and
products  totaled  $6,278,000  in 1996.  The Company did not have any OS product
revenue in 1995. In 1996, US WEST,  NYNEX,  and Northern  Telecom  accounted for
31%, 23%, and 15% of the  Company's  revenue,  respectively.  In 1995, U S WEST,
Ameritech,  NYNEX and Bell  South  accounted  for 45%,  19%,  18% and 13% of the
Company's revenue,  respectively. The Company expects that revenue from sales of
the T3AS  product  family and recently  acquired OS products  and services  will
account for a majority of the Company's revenue for the foreseeable future.

        Gross  profit  totaled  $11,813,000  in  1996,  a slight  increase  from
$11,753,000  in 1995.  Gross  profit as a  percent  of  revenue  was 48% in 1996
compared to 57% in 1995.  The  decrease in gross  profit as a percent of revenue
resulted primarily from a product mix weighted toward lower margin T3AS products
and services and  lower-margin  revenue from OS software  design  services.  The
majority of the Company's Canadian subsidiary's operations supported OS software
design services.  Since the cost of design services revenue includes both direct
and  indirect  costs of  supplying  the  services,  the majority of the Canadian
subsidiary's  operating  costs are included in cost of revenue.  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  pressures  in  the  telecommunication   network
management 


                                       3

<PAGE>

market, 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  costs,
disruptions  in sources of supply,  regulatory  changes,  seasonal  patterns  of
bookings, capital spending, and changes in general economic conditions.

        Research and  development  expenses  totaled  $7,356,000  in 1996, a 27%
increase from $5,807,000 in 1995. The increase was primarily due to the addition
of research and development  personnel as a result of the ACD asset acquisition,
increases in depreciation  expense,  and increases in non-recurring  engineering
(NRE)  expenses  due to timing  of  planned  development  projects  during  1996
compared to 1995.  Research and  development  personnel  expenses  increased 26%
compared  to 1995,  mostly  related to the ACD asset  acquisition.  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.

        In 1996, the Company recorded  one-time  charges for purchased  research
and  development  costs related to the ACD asset  acquisition  and the SSN asset
acquisition of $1,186,000 and $2,100,000, respectively.

        Sales and marketing  expenses totaled $6,312,000 in 1996, a 49% increase
from $4,234,000 in 1995. The majority of the increase resulted from the addition
of technical  customer support  personnel,  the addition of customer support and
marketing  personnel  related  to  the  ACD  asset  acquisition,  and  increased
promotional expenses. 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 planned
product  introductions  in both  the  network  systems  and  network  management
business areas.

        General and  administrative  expenses totaled  $3,576,000 in 1996, a 20%
increase from $2,985,000 in 1995. The majority of the increase is the net result
of increased  expenses for the amortization of goodwill and intangibles  related
to the SSN asset  acquisition and increased  personnel  expenses related to this
year's acquisitions offset by a decrease in legal expenses compared to 1995 as a
result of greater  legal  expense in 1995  related to the suit  settlement.  The
Company  expects  that  general and  administrative  expenses  will  increase in
absolute  dollars  as the  Company  invests  in the  expansion  of its  internal
networking  capabilities  related to the ACD and SSN asset  acquisitions and the
expected need for additional support personnel.

        Interest  income  totaled  $1,673,000  in  1996,  a  17%  decrease  from
$2,023,000 in 1995. The decrease is the result of a decrease in cash investments
during 1996 compared to 1995.

        In 1996, the Company provided for income taxes related to the operations
of the Company's Canadian subsidiary, based on an effective Canadian tax rate of
46%.  The Company did not provide for U.S.  income  taxes in 1996 or 1995 due to
net losses for income tax  purposes.  At  December  31,  1996,  the  Company had
federal  income  tax-  loss  carry-forwards  of  approximately  $12,987,000  and
California state income tax-loss carry-forwards of approximately $5,835,000. The
Company's   use   of   approximately   $1,166,000   of  its   federal   tax-loss
carry-forwards,  and $408,000 of its federal and $105,000 of its  California tax
credit carryforwards are significantly  limited as a result of ownership changes
associated with equity financings in January 1989 and March 1991.  Management is
not able to  estimate  levels of tax  deductions  which will be  generated  as a
result  of  these  transactions  in  future  periods.  See  Note 11 of  Notes to
Financial Statements.

        As a result of the factors  discussed  above, the Company incurred a net
loss of  $7,120,000,  or $.59  per  share  in 1996  compared  to net  income  of
$759,000,  or $.06 per share in 1995.  Excluding  $3,286,000 in one-time charges
for purchased  research and  development  costs  associated with the ACD and SSN
asset acquisitions, the Company incurred a net loss of $3,834,000, or
$.32 per share in 1996.


                                       4

<PAGE>


1995 COMPARED WITH 1994

        Revenue totaled  $20,470,000 in 1995 a 42% decrease from  $35,597,000 in
1994.  The decrease is  attributable  to decreased  sales of the Company's  T3AS
products. In 1995, US WEST,  Ameritech,  NYNEX and Bell South accounted for 45%,
19%,  18% and 13% of the  Company's  revenue,  respectively.  In 1994, U S WEST,
Ameritech,  NYNEX and Bell  South  accounted  for 36%,  32%,  16% and 14% of the
Company's revenue,  respectively.  The majority of the Company's revenue in 1995
and 1994 was derived from the sale of T3AS products.

        Factors  which  may have  contributed  to the  decrease  in sales of the
Company's   products  during  1995  include  one  major  customer  delaying  its
reengineering program;  decreased capital spending at two of the Company's other
customers;  seasonal capital spending freezes at one of the Company's customers;
reorganizations,  restructuring  and  reductions  in  force  at  several  of the
Company's RBOC customers;  the negotiations  with labor unions  establishing new
union  contracts  at six of the seven  RBOC's  during  1995;  the  uncertainties
surrounding the telecommunications deregulation bill; and the delay in receiving
the FCC's informal assessment on the Company's Remote Module product.

        Gross  profit   totaled   $11,753,000  in  1995,  a  43%  decrease  from
$20,791,000 in 1994. The decrease in gross profit was due primarily to decreased
sales of the Company's T3AS products. As a percent of revenue,  gross profit was
57% in 1995 compared to 58% in 1994.

        Research  and  development  expenses  totaled  $5,807,000  in 1995, a 9%
increase from  $5,335,000 in 1994.  Research and development  personnel  related
expenses  increased 19% in 1995 compared to 1994.  The increases  were primarily
the result of the  addition of research  and  development  personnel,  partially
offset by decreases in  non-recurring  engineering  expenses caused by timing of
planned development projects compared to 1994.

        Sales and marketing  expenses totaled $4,234,000 in 1995, a 26% increase
from  $3,363,000  in 1994.  The  increase  in 1995 was  primarily  the result of
increases in technical support, marketing, and sales personnel, increased travel
expenses and increased promotional activity offset by lower commission

expenses owing to decreased revenue  levels.

        General and  administrative  expenses totaled  $2,985,000 in 1995, a 28%
increase  from  $2,337,000  in 1994.  The increase was primarily the result of a
non-recurring charge for the settlement of a class action law suit filed against
the Company in March 1995,  and  increased  consulting  expenses  related to the
Company's  recruiting  efforts for  additional  personnel.  The  increases  were
partially offset by decreases in travel and professional services expense.

        Interest  income  totaled  $2,023,000  in  1995,  a  67%  increase  from
$1,212,000 in 1994.  The increase was due primarily to an increase in investment
income from the  investment of cash proceeds from the Company's  initial  public
offering of common stock  completed in April 1994, as well as the  investment of
cash provided from operations.

        The Company did not provide for income tax expenses in 1995 due to a net
loss for income tax purposes.  In 1994, the Company's effective tax rate was 3%.
The Company's low effective tax rate for 1994 was a result of the utilization of
operating loss  carryforwards and tax credits and the tax benefit resulting from
the  recognition  of certain  deferred  tax  assets  which had  previously  been
reserved for in  recognition  of concerns over the Company's  ability to realize
these assets under the  Statement of  Financial  Accounting  Standards  No. 109,
"Accounting for Income Taxes" ("SFAS No. 109").  SFAS No. 109 allows the Company
to utilize available tax-loss carry-forwards as a direct reduction of its income
tax expense.  During 1994, the Company's  income taxes payable were reduced as a
result of tax deductions  generated from certain stock option transactions which
are not  reflected in the  statement of  operations.  Under  generally  accepted
accounting principles, such amounts are recorded as additional paid-in capital.

        As a result of the  factors  discussed  above,  1995 net income  totaled
$759,000,  or $.06 per share, a 93% decrease from net income of $10,620,000,  or
$.88 per share in 1994.

QUARTERLY RESULTS


                                       5


<PAGE>

        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  bookings,  revenue and  operating  results to vary
significantly  from quarter to quarter  include,  among others:  dependence on a
single  product  lines in the Network  Systems and Network  Management  business
units; dependence on a small group of major customers; the timing of significant
orders;   the   timing   of   shipments;   competition   and   pricing   in  the
telecommunication  network management  market; new product  introductions by the
Company or its competitors;  possible  recalls;  production or quality problems;
timing of development  expenditures;  further expansion of marketing and service
operations;  changes  in  material  costs;  disruptions  in  sources  of supply;
regulatory changes; seasonal patterns of bookings,  capital spending and payment
by customers; and changes in general economic conditions. 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.

LIQUIDITY AND CAPITAL RESOURCES

        Cash and  investments  totaled  $21,461,000  at  December  31,  1996 and
$31,847,000  at December 31,  1995.  The 1996  decrease in cash and  investments
compared to 1995 is primarily  due to cash  payments  related to the SSN and ACD
asset acquisitions,
and 1996 operating losses.

        Net  working  capital  totaled  $31,229,000  at  December  31,  1996 and
$36,728,000 at December 31, 1995. The 1996 decrease in working capital  compared
to 1995 was  primarily  the result of cash  payments  related to the SSN and ACD
asset acquisitions.

        The  Company's  1996  operating   activities  used  $2,265,000  in  cash
primarily as a result of net operating  losses.  In 1995,  operating  activities
used  $4,384,000  in cash  due to  decreased  net  income  compared  to 1994 and
increases in accounts receivable and inventory compared to 1994.

        In 1996,  cash used for the ACD and SSN asset  acquisitions  and related
acquisition costs totaled $1,900,000 and $4,456,000,  respectively. The majority
of tangible  assets  acquired from ACD and SSN consisted of computer  equipment.
Cash used for capital expenditures totaled approximately  $1,709,000 in 1996 and
$1,948,000  in  1995.  Most of the  capital  equipment  additions  were  for the
purchase  of  computer  and lab  equipment  to support  the  Company's  expanded
research  and  development  efforts.  The  Company  did not  acquire any capital
equipment  through  capital  lease  arrangements  in 1996 or 1995.  The  Company
expects that the level of capital expenditures will increase in 1997 as a result
of planned facility moves in Vancouver,  British Columbia,  Canada,  and planned
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.  Significant
additional capital resources,  however,  may be required to fund acquisitions of
complementary businesses, products or technologies.  Alternatively,  the Company
may need to issue additional  shares of its capital stock or incur  indebtedness
in connection with any such acquisitions.  At present, the Company does not have
any agreements or commitments with respect to any such acquisition.

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



                                        6


<PAGE>



                   APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY
                           CONSOLIDATED BALANCE SHEET

<TABLE>
<CAPTION>


       (Dollars in thousands)
YEARS ENDED DECEMBER 31,                                                      1996              1995
ASSETS
Current Assets:
<S>                                                                         <C>                <C>    
     Cash and cash equivalents                                              $ 1,504            $ 1,673
     Investments                                                             19,957             25,079
     Accounts receivable, less allowance for
      doubtful accounts of $50                                                6,798              5,358
     Inventory, net                                                           7,363              6,572
     Deferred income taxes                                                      130                750
     Prepaid expenses and other current assets                                1,089              1,296
                                                                           --------            -------
              Total current assets                                           36,841             40,728
                                                                                                    
Investment - non-current                                                        ---              5,095
Property and equipment, net                                                   4,936              3,361
Intangible assets, net                                                        2,823                ---
Deferred income taxes                                                         1,372                752
          Total assets                                                     --------            -------
                                                                           $ 45,972            $49,936
                                                                           ========            =======
  
LIABILITIES AND SHAREHOLDERS' EQUITY 

Current liabilities: 
     Accounts payable                                                      $  2,120           $  1,820
     Accrued expenses                                                         1,491                843
     Accrued warranty                                                         1,398              1,305
     Current portion of obligations under capital leases                         16                 32
     Deferred revenue                                                           587                ---
                                                                           --------            -------
          Total current liabilities                                           5,612              4,000

Obligation under capital leases, net of
current portion                                                                 33                  49
                                                                           --------            -------

          Total liabilities                                                   5,645              4,049
                                                                           --------            -------
Commitments and contingency 

Shareholders' equity:
   Preferred stock, no par value 7,500,000
    shares authorized, no shares issued                                        ---                ---
   Common stock, no par value, 30,000,000
    shares authorized, 11.899,216 and
    12,255,334 shares issued and outstanding
    at December 31, 1995 and 
    1996, respectively                                                      50,631              49,000

     Additional paid-in capital                                              2,492               2,492
     Unrealized gain on investments                                             25                 147
     Deferred compensation                                                     (50)               (101)
     Accumulated deficit                                                   (12,771)             (5,651)
                                                                           --------            -------
          Total shareholders' equity                                         40,327             45,887
                                                                           --------            -------
          Total liabilities and shareholders' equity                       $ 45,972           $ 49,936
                                                                           ========           ========

</TABLE>



          The accompanying notes are an integral part of the financial
                                   statements



                                        7


<PAGE>




                         APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY
                            CONSOLIDATED STATEMENTS OF OPERATIONS


<TABLE>
<CAPTION>




(Dollars in thousands, except per-share date)
YEARS ENDED DECEMBER 31,                                 1996              1995              1994
<S>                                                    <C>            <C>              <C>        
Revenue                                               $ 24,422        $   20,470          $ 35,597
Cost of revenue                                         12,609             8,717            14,806
                                                      --------        ----------          --------
Gross profit                                            11,813            11,753            20,791
                                                      --------        ----------          --------
Operating expenses: 
     Research and development                            7,356             5,807             5,335
     In-process research and
development related to 
acquisitions                                             3,286               ---               ---
     Sales and marketing                                 6,312             4,234             3,363
     General and administrative                          3,576             2,985             2,337
                                                      --------        ----------          --------
          Total operating expenses                      20,530            13,026            11,035
                                                      --------        ----------          --------
          Operating income (loss)                       (8,717)           (1,273)            9,756

Interest income                                          1,673             2,023             1,212
Other income (expenses), net                                47                 9               (32)
                                                      --------        ----------          --------
          Income (loss) before 
           income taxes                                 (6,997)              759            10,936

Provision for income taxes                                 123               ---               316
                                                      --------        ----------          --------
         Net income (loss)                            $ (7,120)       $      759          $ 10,620
                                                      --------        ----------          --------
         Net income (loss) per share                  $  ( .59)       $      .06          $    .88
                                                      ========        ==========          ========
         Shares used in per-share  
           computations                                 12,084            12,848            12,091
                                                      ========        ==========          ========
</TABLE>



          The accompanying notes are an integral part of the financial
                                   statements


                                        8


<PAGE>



<TABLE>
<CAPTION>


DOLLARS IN THOUSANDS

                                                       CONVERTIBLE PREFERRED STOCK

                                               SERIES A        SERIES B       SERIES C       SERIES D       SERIES E   COMMON STOCK
                                               --------        --------       --------       --------       --------   ------------
<S>                                            <C>             <C>            <C>             <C>           <C>         <C>
BALANCE, JANUARY 1, 1994                          1,000       $   5,000       $    768       $  7,773       $  4,664      $     88

Issuance of 2,590,000 shares of common stock
initial public offering, net of costs                --              --             --             --             --        28,357

Conversion of preferred stock into 7,872,199
shares of common stock upon completion of
intial public offering                           (1,000)         (5,000)          (768)        (7,773)        (4,664)       19,205

Excercise of stock options and warrants for
592,026 shares of common stock                       --             --              --             --             --            95

Issuance of 52,134 shares of common stock
under stock purchase plan                            --             --              --             --             --            536

Unrealized loss on investments                       --             --              --             --             --           --

Amoritization of deferred compensation
related to stock options                             --             --              --             --             --           --

Repayment of note receivable                         --             --              --             --             --           --

Tax effect of options excercised                     --             --              --             --             --           --

Net income                                           --             --              --             --             --           --



BALANCE, DECEMBER 31, 1994                           --             --              --             --             --        48,281

Excercise of stock options and warrants for
261,662 shares of common stock                       --             --              --             --             --            76

Issuance of 62,493 shares of common stock
under stock purchase plan                            --             --              --             --             --           643

Unrealized gain on investments                       --             --              --             --             --           --

Amoritization of deferred compensation related
to stock options                                     --             --              --             --             --           --

Net income                                           --             --              --             --             --           --



BALANCE DECEMBER 31, 1995                            --             --              --             --             --        49,000

Excercise of stock options for 149,263 shares
of common stock                                      --             --              --             --             --           115

Issuance of 56,857 shares of common stock
under stock purchase plan                            --             --              --             --             --           428

Unrealized loss on investments                       --             --              --             --             --           --

Amoritization of deferred compensation related
to stock options                                     --             --              --             --             --           --

Issuance of 150,000 shares of common stock
in connection with acquisition                       --             --              --             --             --         1,088

Net loss                                             --             --              --             --             --           --

BALANCE, DECEMBER 31, 1996                           --             --              --             --             --      $ 50,631

</TABLE>


<TABLE>

DOLLARS IN THOUSANDS
                                                                                                   NOTES
                                                                    UNREALIZED                   RECEIVABLE
                                                   ADDITIONAL     GAIN (LOSS) ON    DEFERRED     FROM COMMON    ACCUMULATED
                                                 PAID-IN CAPITAL    INVESTMENTS   COMPENSATION   SHAREHOLDERS     DEFICIT     TOTAL
                                                 ---------------    -----------   ------------   ------------     -------     -----



<S>              <C>                              <C>              <C>           <C>             <C>           <C>        <C>     
BALANCE, JANUARY 1, 1994                          $    1,043       $    --       $   (205)       $  (19)       $ (17,030) $  3,082
                                                    
Issuance of 2,590,000 shares of common stock        
initial public offering, net of costs                     --            --             --            --               --    28,357
                                                    
Conversion of preferred stock into 7,872,199        
shares of common stock upon completion of           
intial public offering                                    --            --             --            --               --        --
                                                    
Excercise of stock options and warrants for         
592,026 shares of common stock                            --            --             --            --               --        95
                                                    
Issuance of 52,134 shares of common stock           
under stock purchase plan                                 --            --             --            --               --       536
                                                    
Unrealized loss on investments                            --          (436)            --            --               --      (436)
                                                    
Amoritization of deferred compensation              
related to stock options                                  --            --             52            --               --        52
                                                    
Repayment of note receivable                              --            --             --            19               --        19
                                                    
Tax effect of options excercised                       1,449            --             --            --               --     1,449
                                                    
Net income                                                --            --             --            --           10,620    10,620
                                                    
                                                    
                                                    
BALANCE, DECEMBER 31, 1994                             2,492          (436)           153            --           (6,410)   43,774
                                                    
Excercise of stock options and warrants for         
261,662 shares of common stock                            --            --             --            --               --        76
                                                    
Issuance of 62,493 shares of common stock           
under stock purchase plan                                 --            --             --            --               --       643
                                                    
Unrealized gain on investments                            --           583             --            --               --       583
                                                    
Amoritization of deferred compensation related      
to stock options                                          --            --             52            --               --        52
                                                    
Net income                                                --            --             --            --              759       759
                                                    
                                                    
                                                    
BALANCE DECEMBER 31, 1995                              2,492           147           (101)           --           (5,651)    45887
                                                    
Excercise of stock options for 149,263 shares       
of common stock                                           --            --             --            --               --       115
                                                    
Issuance of 56,857 shares of common stock           
under stock purchase plan                                 --            --             --            --               --       428
                                                    
Unrealized loss on investments                            --          (122)            --            --               --      (122)
                                                    
Amoritization of deferred compensation related      
to stock options                                          --            --             51            --               --        51
                                                    
Issuance of 150,000 shares of common stock          
in connection with acquisition                            --            --             --            --               --     1,088
                                                    
Net loss                                                  --            --             --            --           (7,120)   (7,120)
                                                    
BALANCE, DECEMBER 31, 1996                          $   2,492       $   25        $  (50)         $  --       $  (12,771)  $40,327


</TABLE>



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


                                        9


<PAGE>


                   APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY
                      CONSOLIDATED STATEMENTS OF CASH FLOWS

                                   ----------

<TABLE>
<CAPTION>

Years Ended December 31,                                            1996           1995         1994
                                                                    ----           ----         ----
<S>                                                            <C>                 <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss)                                             $  (7,120)         759         10,620
  Adjustments to reconcile net income (loss) to
   net cash provided (used) by operating activities:
  In-process research and development
   related to acquisitions                                          3,286          ---            ---
  Depreciation and amortization                                     1,819          904            708
  Amortization of discount or premium on investments                   95          119           (132)
  Amortization of deferred compensation                                51           52             52
  Change in accounts receivable and
    inventory reserves                                                (68)         103            133
  Changes in operating assets and liabilities
     Accounts receivable                                           (1,440)      (2,792)          (150)
      Inventory                                                      (732)      (2,232)        (3,070)
      Deferred income taxes                                           ---          ---            (52)
      Prepaid expenses and other current assets                       207         (327)          (825)
      Accounts payable                                                300         (440)           381
      Accrued expenses                                                648         (515)           467
      Accrued warranty                                                 93          (15)           834
      Deferred revenue                                                587          ---            ---
                                                                ----------    ---------      ---------
         Net cash provided (used) by 
          operating activities                                     (2,265)      (4,384)         8,966
                                                                ----------    ---------      ---------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchases of investments                                       (20,923)     (33,863)       (48,166)
   Maturities of investments                                       30,923       38,595         13,419
   Purchases of property and equipment                             (1,709)      (1,948)        (1,888)
   Purchase costs related to asset acquisitions                    (6,356)        ---            ---
   Purchase of license agreement                                     (350)        ---            ---
                                                                ----------    ---------      ---------
        Net cash provided (used) by
         investing activities                                       1,585        2,784        (36,635)
                                                                ----------    ---------      ---------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Principal payments on obligations under capital leases             (32)        (126)          (522)
   Proceeds from repayment of note receivable from related party       ---         ---             19
   Proceeds from exercise of stock options and warrants               115           76             95
   Proceeds from issuance of common stock, net of costs               428          643         28,893
                                                                ----------    ---------      ---------
        Net cash provided by financing activities                     511          593         28,485
                                                                ----------    ---------      ---------
        Net increase (decrease) in cash and cash equivalents         (169)      (1,007)           816

   Cash and cash equivalents at beginning of year                   1,673        2,680          1,864
                                                                ----------    ---------      ---------
   Cash and cash equivalents at end of year                     $   1,504     $  1,673       $  2,680
                                                                ==========    =========      =========

</TABLE>



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


                                       10


<PAGE>



                   APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


 1.     NATURE OF OPERATIONS:

Applied Digital Access, Inc. and subsidiary (the "Company")  designs,  engineers
and manufactures network test and performance  monitoring systems,  software and
services for the  management  and test of  telecommunication  circuits.  Current
sales are  concentrated  with "Regional Bell Operating  Companies" or affiliated
companies in the United States and Canada.

The market for the Company's  products is characterized  by rapid  technological
advances,   evolving  industry  transmission  standards,   changes  in  customer
requirements  and  frequent  new product  introductions  and  enhancements.  The
introduction  of telephone  network  test and  performance  monitoring  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.

 2.     SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

PRINCIPLES OF CONSOLIDATION
The consolidated  financial  statements  include the accounts of the Company and
its  wholly-owned  subsidiary,  Applied  Digital Access - Holding,  Inc. and its
wholly-owned  subsidiary,  Applied Digital Access - Canada, Inc. ("ADA-Canada").
All intercompany transactions and balances have been eliminated.

CASH AND CASH EQUIVALENTS
Cash and  cash  equivalents  consist  of cash and  short-term  investments  with
original maturities of 90 days or less when purchased.

INVENTORY
Inventory is stated at the lower of cost or market using the first-in, first-out
method. The Company currently buys certain key components of its products from a
limited number of suppliers. Although there are a limited number of suppliers of
the components,  management  believes that other suppliers could provide similar
key components on comparable terms. A change in suppliers,  however, could cause
a delay in  manufacturing  and a possible loss of sales,  which would  adversely
affect operating results.

INVESTMENTS
The Company determines the appropriate  classification of its debt securities at
the time of purchase and  re-evaluates  such  designations at each balance sheet
date.  Investments  are  classified as  "available  for sale" and are carried at
their fair value.  Realized gains and losses are  determined  using the specific
identification method and are included in other income. Gross unrealized holding
gains or losses are excluded from earnings and reported,  net of the related tax
effect, as a separate  component of shareholders'  equity. The amortized cost of
debt  securities is adjusted for the  amortization  of premiums and accretion of
discounts to maturity.  Such  amortization is included in interest income.  Fair
value is determined based on quoted market prices.

PROPERTY AND EQUIPMENT
Property and  equipment  is stated at cost and  depreciated  over the  estimated
useful lives of the assets (3 to 7 years) using the straight-line method. Leased
property  meeting  certain  criteria is capitalized and the present value of the
related lease payments is recorded as an obligation. Amortization of capitalized
leased  assets is computed on the  straight-line  method over the shorter of the
lease term or the assets'  estimated  useful lives.  Maintenance and repairs are
charged to expense as incurred.  Upon the retirement or other  disposition,  the
property and related  accumulated  depreciation or amortization are removed from
the accounts and any resulting profit or loss is reflected in income.

                                       11
<PAGE>


2.      SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, CONTINUED:

INTANGIBLE ASSETS
The Company  amortizes costs in excess of fair value of net assets of businesses
acquired using the  straight-line  method over 3 to 5 years.  Recoverability  is
reviewed annually or sooner if events or changes in circumstances  indicate that
the carrying value may exceed fair value.

REVENUE RECOGNITION
Revenue is generally  recognized  at the time of shipment or delivery,  based on
specified  shipping terms,  or when services have been performed.  When customer
acceptance criteria are specified in the customer order,  revenue recognition is
deferred until the acceptance criteria are met.

INCOME TAXES
Deferred  income taxes are recognized for the tax  consequences  in future years
for  differences  between  the tax basis of assets and  liabilities  ("temporary
differences")  and their financial  reporting  amounts at each year end based on
enacted  tax laws and  statutory  rates  applicable  to the periods in which the
temporary   differences  are  expected  to  affect  taxable  income.   Valuation
allowances are  established  when necessary to reduce deferred tax assets to the
amount  expected to be  realized.  Income tax expense is the tax payable for the
period and the change during the period in deferred tax assets and liabilities.

ADVERTISING COSTS
Advertising  costs are  expensed  as  incurred.  Total  advertising  expense was
approximately  $88,000,  $141,000 and $217,000 for the years ended  December 31,
1994, 1995 and 1996, respectively.

STOCK-BASED COMPENSATION
Statement of Financial  Accounting  Standards  ("SFAS") No. 123,  ACCOUNTING FOR
STOCK-BASED COMPENSATION,  encourages, but does not require, companies to record
compensation cost for stock-based employee compensation plans at fair value. The
Company has chosen to continue to account for stock-based compensation using the
intrinsic value method prescribed in Accounting Principles Board Opinion No. 25,
ACCOUNTING   FOR  STOCK  ISSUED  TO  EMPLOYEES   and  related   interpretations.
Accordingly,  options  granted at below fair  market  value  result in  deferred
compensation  to the extent of the  difference  between the fair market value at
the date of grant and the exercise price.  The deferred  compensation is charged
to earnings ratably over the vesting period.  During the three year period ended
December 31, 1996, no options were granted at below fair market value.

PER SHARE INFORMATION
Net income  (loss) per share is computed  using the weighted  average  number of
common shares and common equivalent shares (when the effect is dilutive)


USE OF ESTIMATES
The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect  the  reported  amounts  of assets  and  liabilities  and  disclosure  of
contingent assets and liabilities at the date of the financial  statements,  and
the  reported  amounts of revenues  and expenses  during the  reporting  period.
Actual results could differ from estimates.


                                       12


<PAGE>


 3.     STATEMENTS OF CASH FLOWS:
<TABLE>
<CAPTION>

Non-cash investing and financing activities are as follows:

                                                   Years Ended December 31,
                                                   ------------------------
        (Dollars in thousands)               1994            1995             1996
        ----------------------               ----            ----             ----
<S>                                        <C>               <C>              <C>
Property and equipment acquired with
     capital lease financing               $  189            $-               $ -
Conversion of preferred stock 
     upon completion
     of initial public offering            19,205             -                 -
Issuance of stock in connection
     with acquisition                          -              -             1,088

Cash payments for interest and income taxes are as follows:

                                                    Years Ended December 31,
                                                    ------------------------
        (Dollars in thousands)               1994            1995             1996
        ----------------------               ----            ----             ----
<S>                                        <C>               <C>              <C>
               Interest                     $ 53           $ 13              $  7
               Income taxes                  144            506                 -

</TABLE>

 4.     INVESTMENTS:

Marketable  securities at December 31, 1995 and 1996 consist of  obligations  of
the U.S. Government and its agencies and are summarized as follows:

<TABLE>
<CAPTION>

                                         Years Ended December 31,
                                         ------------------------
        (Dollars in thousands)             1995            1996
                                           ----            ----
<S>                                  <C>             <C>       
        Cost                         $  30,027       $   19,936
        Gross unrealized gains             148               57
        Gross unrealized losses             (1)             (36)
                                     ---------          -------
               Estimated fair value  $  30,174          $19,957
                                     =========          =======
</TABLE>


 5.     INVENTORY:
Inventory at December 31, 1995 and 1996 consists of the following:
<TABLE>
<CAPTION>

          (Dollars in thousands)          1995             1996
          ----------------------          ----             ----
<S>                                     <C>              <C>   
        Raw materials                   $3,483           $4,211
        Work-in-process                  2,314            2,558
        Finished goods                   1,313            1,063
                                        ------           ------
                                        7,110             7,832
        Less inventory reserve           (538)             (469)
                                        ------            ------
                                       $6,572             $7,363
                                       ======             ======

</TABLE>


                                       13
<PAGE>

 6.     PROPERTY AND EQUIPMENT:
Property and equipment at December 31, 1995 and 1996 consists of the following:

<TABLE>
<CAPTION>


        (Dollars in thousands)                   1995             1996
        ----------------------                   ----             ----
<S>                                             <C>              <C>   
        Computers                               $2,500           $4,254
        Machinery, furniture and equipment       2,716            3,614
        Purchased computer software                729              894
        Leasehold improvements                     640              766
                                                ------            ------
                                                 6,585            9,528
        Less accumulated depreciation
          and amortization                      (3,224)          (4,592)
                                                ------            ------

                                                $3,361            $4,936
                                                ======            ======
</TABLE>

Property and equipment  acquired  under  capital  leases  totaled  approximately
$444,000 and $216,000 at December 31, 1995 and 1996,  respectively.  Accumulated
amortization  related  to assets  under  capital  leases  totaled  approximately
$299,000 and $106,000 as of December 31, 1995 and 1996, respectively.



 7.     INTANGIBLE ASSETS:
Intangible assets at December 31,1996 consist of the following:

<TABLE>
<CAPTION>

             (Dollars in thousands)                  1996

<S>                                                <C>   
        Goodwill and know-how                      $2,588
        Purchased technology, customer contracts      337
        License agreement                             350
                                                   ------
                                                    3,275
        Less accumulated amortization                (452)
                                                   ------
                                                   $2,823
                                                   ======

</TABLE>

 8.     ACCRUED EXPENSES:
     Accrued expenses at December 31, 1995 and 1996 consist of the following:
<TABLE>
<CAPTION>

               (Dollars in thousands)                1995                 1996
               ----------------------                ----                 ----
<S>                                                 <C>                <C>    
        Accrued payroll and related costs           $ 489               $  443
        Income taxes                                   -                   444
        Accrued vacation                              316                  431
        Other                                          38                  173
                                                    -----               ------
                                                    $ 843               $1,491
                                                    =====               ======
</TABLE>

                                       14
<PAGE>

 9.     COMMITMENTS AND CONTINGENCY:

LEASES
The Company leases office space and equipment under operating leases. Certain of
these leases include renewal or purchase options.  Rent expense related to these
leases was  approximately  $288,000,  $386,000  and $613,000 for the years ended
December 31, 1994, 1995 and 1996, respectively.

The Company also leases certain property and equipment under capital leases.

Minimum commitments under these leases are as follows:
<TABLE>
<CAPTION>

        (Dollars in thousands)

                                         Operating       Capital
         Year ending December 31,         Leases          Lease
         ------------------------         ------          -----
            <S>                          <C>               <C>
                1997                     $   788           $20
                1998                       1,064            20
                1999                       1,049            15
                2000                         732             -
                2001                         756             -
                Thereafter                 1,392             -
                                         --------        ------

                 Total minimum
                 lease payments           $5,781            55
                                         ========        ======

                 Less amounts representing interest         (6)
                                                         ------
                 Obligations under capital leases           49
                 Less current portion                      (16)
                                                         ------
                                                           $33
                                                         ======
</TABLE>

PURCHASE COMMITMENTS
At December 31, 1996, the Company has open purchase commitments of approximately
$3,731,000  which  include  approximately   $2,264,000  of  cancelable  purchase
commitments.

LEGAL PROCEEDING
In March 1995, a class action  lawsuit was filed  against the Company and two of
its  officers,  one of whom is  also a  director  of the  Company,  in the  U.S.
District  Court for the  Southern  District  of  Southern  California.  The suit
alleged  violations of Section 10(b) and Rule 10b-5 of the  Securities  Exchange
Act of 1934, as amended (the "Act"),  arising out of alleged  misrepresentations
and omissions made by the Company and the named officers.  The suit also alleged
violation  of Section  20(a) of the Act arising out of alleged  "control" of the
Company by the officer defendants.  The suit was brought on behalf of purchasers
of the Company's securities during the period October 10, 1994 through March 29,
1995, and sought unspecified damages. In December 1995, the Company entered into
a  settlement  agreement  pursuant  to which  all  claims  were  dismissed  with
prejudice.  The total settlement amount was approximately  $1,500,000,  of which
the Company paid  approximately  $446,000 with the remaining  amount paid by the
Company's Directors' and Officers' liability insurance carriers.  Obligations of
the  Company  with  respect to this matter were  provided  for in the  financial
statements  during the year ended  December  31,  1995 and paid  during the year
ended December 31, 1996.

10.     SHAREHOLDERS' EQUITY:

In April 1994, the Company  completed the initial public  offering of its shares
of common stock, at a price of $12.00 per share  including  2,200,000 which were
sold by the  Company and 400,000  which were sold by existing  shareholders.  In
addition,  the Company's  underwriters  also  exercised an option to purchase an
additional 390,000

                                       15
<PAGE>

shares to cover  over-allotments.  The net proceeds realized by the Company from
this offering were $28.4 million after deducting the  underwriting  discount and
expenses payable by the Company related to the offering.

Effective upon the closing of the offering, 55,105,577 shares of preferred stock
were converted into 7,872,199  shares of common stock after giving effect to the
1-for-7 reverse stock split.

In March 1994, the Company's Articles of Incorporation were amended  authorizing
30,000,000  shares  of common  stock,  no par  value,  and  7,500,000  shares of
preferred  stock,  no par value.  The preferred stock may be issued from time to
time in one or more  series  with the Board of  Directors  authorized  to fix or
alter the  designation,  powers,  preferences  and  rights of the shares of each
series.

STOCK COMPENSATION PLANS
At December 31, 1996, the Company has stock-based  compensation  plans which are
described below. The Company applies Accounting Principles Board Opinion No. 25,
ACCOUNTING  FOR STOCK  ISSUED  TO  EMPLOYEES,  and  related  interpretations  in
accounting for its plans. Accordingly,  no compensation cost has been recognized
for its fixed stock option plans and its stock purchase  plan. Had  compensation
costs for the Company's stock-based  compensation plans been determined based on
the fair value at the grant  dates for awards in 1995 and 1996 under those plans
consistent with the methods of SFAS No. 123, the Company's net income (loss) and
earnings  per share would have been reduced to the pro forma  amounts  indicated
below:

<TABLE>
<CAPTION>

        (Dollars in thousands)                       1995                        1996
<S>                                                  <C>                       <C>     
        Net income (loss):
               As reported                          $ 759                     $(7,120)
               Pro forma                             (195)                     (8,352)

        Net income (loss) per common share:
               As reported                           $.06                       $(.59)
               Pro forma                             (.02)                       (.69)

</TABLE>

FIXED STOCK OPTION PLANS
In May 1996, the Company adopted the 1996  Non-Qualified  Stock Option Plan (the
"1996 Plan").  The 1996 Plan does not affect the 1994 Plan. Under the 1996 Plan,
the Company is authorized to issue 400,000 shares of common stock. The 1996 Plan
is intended to promote the interests of the Company or its parents or subsidiary
corporations.  Under the 1996 Plan, eligible  individuals may be granted options
to purchase  shares of the  Company's  common  stock at not less than 85% of the
fair market  value of such shares on the date of grant.  Such  options  shall be
exercisable in one or more  installments as specified in the Notice of Grant and
have a maximum term of 10 years. Persons eligible to receive stock options under
the 1996 Plan are key  employees  of the  Company  other than  officers  who are
responsible for the growth and financial  success of the Company and consultants
and other independent contractors who provide valuable services to the Company.

In February 1994, the Company adopted the 1994 Stock Option/Stock  Issuance Plan
(the "1994 Plan").  The 1994 Plan  supersedes  and  consolidates  the 1988 Stock
Option Plan and Restricted  Stock  Purchase Plan (the "1988 Plan").  Outstanding
stock options and unvested share issuances under the 1988 Plan were incorporated
into and  assumed  in the 1994  Plan.  In May of 1996,  the  Board of  Directors
received  shareholder  approval to increase the  authorized  shares to 3,800,000
under the 1994 Plan.  The 1994 Plan is divided into three  separate  components:
the  Discretionary  Option Grant  Program  (the  "Discretionary  Program");  the
Automatic Option Grant Program (the "Automatic  Program") and the Stock Issuance
Program (the "Issuance  Program").  Under the  Discretionary  Program,  eligible
individuals  may be granted options to purchase shares of the Company's stock at
not less than 85% of the fair market  value of such shares on the date of grant.
Under the  Automatic  Program,  non-employee  Directors  will  automatically  be
granted options to purchase common stock at 100% of the fair market value on the
grant date. Under the Issuance Program,  eligible  individuals may be allowed to
purchase shares of the Company's  common stock at discounts from the fair market
value of such  shares of up to 15%.  Such  shares may be issued as  fully-vested
shares or as  shares  to vest  over time and have a maximum  term of 10 years (5
years for options  granted to a 10%  shareholder).  Persons  eligible to receive
stock  issuances  under the  Issuance  Program  and/or  option  grants under the
Discretionary  Program are officers  and other key  employees of the Company and
certain  consultants or other 

                                       16


<PAGE>

independent  contractors,  as defined in the plan. The  individuals  eligible to
receive  option  grants  under the  Automatic  Program are  individuals  who are
elected, re-elected or appointed as non-employee Board members.


The fair value of each option  grant is estimated on the date of grant using the
Black-Scholes   option-pricing   model  with  the   following   weighted-average
assumptions  used for  grants  in 1995 and 1996:  no  dividend  yield;  expected
volatility;  risk-free  interest rates on or about the date of grant represented
by the interest rate on U.S. Treasury Bills with a term of maturity equal to the
vesting period of the options, and expected lives of 5 years.

The following table summarizes  stock option  transactions for each of the three
years in the period ended December 31, 1996:

<TABLE>
<CAPTION>

                                                  Weighted                           Weighted
                                                   Average                            Average
                                                  Exercise                           Exercise
                               Shares               Price              Shares          Price
<S>                          <C>                     <C>                <C>           <C> 
Outstanding at
January 1, 1994              1,711,492               $.39              44,587           $.14
  Granted                      319,665             $17.36               ---              ---
  Exercised                   (509,029)              $.18             (17,000)          $.14
  Canceled                     (82,384)              $.43               ---              ---
                               -------------                        ------------

Outstanding at                     
December 31, 1994            1,439,744              $4.22              27,587           $.14
  Granted                      737,025             $12.30                ---             ---
  Exercised                   (205,068)              $.35             (10,500)          $.14
  Canceled                    (300,392)            $18.30                ---             ---
                              --------             ------             -------           ------

Outstanding at          
December 31,  1995           1,671,309              $5.63              17,087           $.14
  Granted                      874,887              $9.01                ---             ---
  Exercised                   (149,261)              $.77                ---             ---
  Canceled                    (598,732)            $12.01                ---             ---
                              --------             ------              ------          ------

Outstanding at
December 31, 1996            1,798,203              $5.54              17,087           $.14
                             =========                                 ======           
</TABLE>


The range of exercise  prices of stock options  outstanding at December 31, 1996
is as follows:

<TABLE>
<CAPTION>

                                            Options Outstanding                    Options Exercisable
                                             -------------------                   -------------------
                                            Weighted
                                             Average             Weighted                              Weighted
     Range of                               Remaining            Average                               Average
     Exercise                Number        Contractual           Exercise            Number            Exercise
      Prices              Outstanding         Life                Price            Exercisable          Price
<S>                         <C>              <C>                 <C>               <C>                  <C> 
        $.14 - $.28          366,413          4.81                $.16              362,585              $.16
       $.42 - $1.05          325,590          6.57                $.46              268,798              $.45
      $2.80 - $6.50          304,142          8.85               $5.67               53,374             $3.07
      $6.63 - $8.40          460,504          9.54               $8.05               14,005             $7.35
     $11.25 - $16.13         341,554          8.72              $12.65              132,264            $12.29
      --------------         -------         ------             ---------           --------           -------
       $.14 - $16.13       1,798,203          7.77               $5.54              831,026             $2.49
       ====   ======       =========          ====               =====              =======             =====


</TABLE>

                                       17

<PAGE>

At December 31, 1995 and 1996, 571,106 and 1,191,381 shares,  respectively,  are
available for granting of options under the 1994 and 1996 Plans.

STOCK PURCHASE PLAN The Amended 1994 Employee  Stock  Purchase Plan,  originally
adopted in February 1994 (the "Stock Purchase Plan"),  authorizes the Company to
issue up to 300,000 shares of common stock to participating employees. The Stock
Purchase Plan is intended to provide  qualifying  employees with the opportunity
to acquire an interest in the Company by accumulating amounts for the employees'
account through payroll deductions and the periodic  application of such amounts
to the purchase of shares of the Company's common stock.  Under the terms of the
Stock Purchase Plan,  qualified employees can choose each year to have up to 15%
of their annual base earnings  withheld to purchase the Company's  common stock.
The  purchase  price of the stock will be equal to 85% of the lower fair  market
value of the common stock on (i) the commencement date of the offering period or
(ii) the purchase date. The Stock Purchase Plan terminates on December 31, 2003.
Under the Stock  Purchase  Plan,  the Company  sold 62,493 and 56,857  shares to
employees  in 1995 and 1996,  respectively.  There are 128,516  shares of common
stock available for purchase under the Stock Purchase Plan at December 31, 1996.

In order to disclose the pro forma net income and earnings per share as required
by SFAS No.  123 (see Stock  Compensation  Plans  above),  the fair value of the
employees'  purchase rights is estimated using the Black-Scholes  model with the
following  assumptions for 1995 and 1996: no dividend yield, expected volatility
risk-free  interest rates on the date of grant  represented by the interest rate
on U.S.  treasury  bills with a term of  maturity  equal to the period  from the
subscription date to the purchase date. The weighted-average fair value of those
purchase rights granted in 1995 and 1996 was $13.89 and $9.56, respectively.


11.     INCOME TAXES:

The provision for income taxes for the years ended December 31, 1994, 1995 and
1996 are as follows:

<TABLE>
<CAPTION>

        (Dollars in Thousands)                     1994         1995       1996
        ----------------------                     ----         ----       ----

       Current:
<S>                                             <C>            <C>        <C> 
                Federal                         $   897        $  -       $  -
                State                               320           -          -
                Foreign                              -            -         123
                                                   ----         ----       ----

                                                  1,217           -         123
                                                  -----         ----       ----
       Deferred:
                Federal                            (786)          -          -
                State                              (115)          -          -
                Foreign                              -            -          -
                                                  ------        ----       ----

                                                   (901)          -          -
                                                  ------        ----       ----

                                                 $  316        $  -         $123
                                                 =======        ====        ====
 </TABLE>


                                       18

<PAGE>

Differences  between the statutory  rate and the effective tax rate for the year
ended December 31, 1994, 1995 and 1996 are as follows:

<TABLE>
<CAPTION>


                                                                    1994        1995      1996
                                                                    ---------------------------

<S>                                                                <C>          <C>      <C>    
           Taxes at federal statutory rate                         34.0%        34.0%    (34.0%)
           Foreign income taxes                                      - %         -  %      1.8%
           Net operating loss carryforwards and research and
                development tax credits (utilized) not utilized   (23.4%)      (33.0%)    33.0%
           Change in valuation allowance                          (13.6%)      (33.0%)     -  %
           Other                                                    5.9%        (1.0%)     1.0%
                                                                  -------      -------    ------

                Provision for income taxes                         12.9%         -  %      1.8%
                                                                   ====        ======     =====
</TABLE>


The  components  of the deferred tax assets at December 31, 1995 and 1996 are as
follows:

<TABLE>
<CAPTION>

        (Dollars in thousands)                                     1995                     1996
        ----------------------                                     ----                     ----

<S>                                                              <C>                      <C>   
        Allowances and reserves                                  $  760                   $  773
        Vacation accrual                                            128                      146
        Capitalized research and development                        723                    2,211
        Net operating loss carryforwards                          2,819                    4,774
        Tax credits                                               1,200                    1,429
        Accelerated depreciation                                   (164)                    (252)
        Other                                                         8                       10
                                                                  -------                  ------

               Total gross deferred tax asset                     5,474                    9,091

        Less valuation allowance                                 (3,972)                  (7,589)

               Net deferred tax asset                            $1,502                   $1,502
                                                                  =====                    =====
</TABLE>



The Company has recorded a net deferred tax asset of  $1,502,000  as of December
31, 1996.  Realizability  is dependent on generating  sufficient  taxable income
prior  to  expiration  of  the  net  operating  loss   carryforwards.   Although
realization is not assured,  management believes it is more likely than not that
the net  deferred  tax asset will be  realized.  The amount of the  deferred tax
asset  considered  realizable,  however,  could be  reduced  in the near term if
estimates of future taxable income during the carryforward period are reduced.

At December 31,  1996,  the Company has net  operating  loss  carryforwards  for
federal income tax purposes of approximately $12,987,000, of which $5,161,000 is
attributable to  disqualifying  dispositions of stock options.  The Company also
has  net  operating   loss   carryforwards   for   California  tax  purposes  of
approximately   $5,835,000  at  December  31,  1996,  of  which   $2,508,000  is
attributable  to  disqualifying   dispositions  of  stock  options.  The  amount
attributable  to the  disposition of stock options will not impact the Company's
effective  tax rate in future  periods  as the  impact  will be  reflected  as a
component of equity when recognized.

The Company  also has  research  and  development  tax credit  carryforwards  of
approximately $1,087,000 for federal and $255,000 for California tax purposes at
December 31, 1996. These carryforwards will begin expiring, if unused, in 2003.

The Internal Revenue Code (the "Code") imposes limits on the availability of net
operating loss carryforwards and certain tax credits that arose prior to certain
cumulative changes in a corporation's ownership resulting in a change of control
of the Company. The Company's use of approximately $1,166,000 of its federal net
operating loss carryforwards and $408,000 of its federal and $105,000 of its
California  tax credit  carryforwards  are  significantly  limited  because  the
Company  underwent  "ownership-changes"  in January 1989 and March 1991. In each
year following the change,  the Company will be able to offset taxable income by
a limited amount of the pre-ownership

                                       19

<PAGE>

change carryforwards.  This limitation is determined by the value of the Company
immediately prior to the ownership change multiplied by the long-term tax-exempt
rate. Net operating losses and tax credits that are unavailable in any year as a
consequence of this  limitation may be carried forward for future use subject to
certain restrictions.

12.  EMPLOYEE  BENEFITS:  The Company  has a 401(k)  defined  contribution  plan
available  to all  employees  who have been with the  Company  for more than one
month.  Employees  may  contribute  up to 15% of their  salary each year and the
Company may elect to make a discretionary  contribution to the plan once a year.
All plan  participants  who are  employed  at the end of the plan  year and have
completed  1,000  hours of service in that plan year are  eligible  to receive a
share  of the  employer  contribution.  Participant's  rights  to  the  employer
contributions  vest 25% per year of service  with the  participant  being  fully
vested at the end of the fourth  year of  service.  The  Company  did not make a
discretionary contribution in 1994, 1995 or 1996.

In 1995,  the Company  adopted a profit sharing plan available to all employees.
The plan  provides  financial  benefits to  employees  when the Company  exceeds
certain  targeted  objectives.  The  Compensation  Committee  of  the  Board  of
Directors annually  determines the maximum amount that is allocated to the plan.
Employees  are eligible to  participate  in the plan at the start of the quarter
following  their  employment  at the  Company.  The  Company  did not  make  any
allocation to the profit sharing plan in 1995 or 1996.

13.  CONCENTRATION  OF CREDIT  RISK:  
Financial instruments which potentially subject the Company to concentrations of
credit risk consist  principally of cash and cash  equivalents,  investments and
trade receivables.

The Company has approximately $858,000 of cash and cash equivalents in excess of
FDIC insured  limits at two  financial  institutions  at December 31, 1996.  The
Company has not experienced any losses on its cash and cash equivalents.

All  of  the  Company's  investments,  all  of  which  mature  in  1997,  are in
obligations of the U.S. Government and its agencies at December 31, 1996.

At December 31, 1995 and 1996, the Company's trade  receivables are concentrated
with "Regional Bell Operating  Companies" or affiliated  companies in the United
States,  all of which  management  believes are large companies with substantial
financial  resources.  Sales are typically made on credit,  with terms that vary
depending upon the customer and the nature of the product.  The Company does not
hold collateral to secure payment.  Although the Company maintains a reserve for
uncollectible  receivables that it believes to be adequate, a payment default on
a significant sale or customer  receivable could materially and adversely affect
its operating results and financial condition.


      Sales to major customers for each year are as follows (% of revenue):

<TABLE>
<CAPTION>


                                                    1994       1995     1996
                                                    ------------------------

<S>                                                  <C>        <C>      <C>
                      Nynex                          16%        18%      23%
                      Bell South                     14%        13%       7%
                      US West                        36%        45%      31%
                      Ameritech                      32%        19%       9%
                      Nortel                          -          -       15%

</TABLE>

Sales to an affiliate of a shareholder during the years ended December 31, 1994,
1995  and  1996  were  approximately  $11,320,000,  $3,836,000  and  $2,263,000,
respectively, of which $186,000 and $140,000 are included in accounts receivable
at December 31, 1995 and 1996, respectively.


                                       20

<PAGE>


14.     ACQUISITIONS:
In February  1996,  the Company  acquired  certain  assets of Applied  Computing
Devices,  Inc. ("ACD"), a company that developed and marketed operations systems
software used  primarily by  independent  telephone  companies to manage certain
functions in their  networks.  The  customer set and products of ACD  complement
those of the Company  and the Company  intends to continue to market and enhance
these  products.  The Company  acquired  the assets for  $1,700,000  in cash and
incurred approximately $200,000 in related costs. The assets were acquired at an
auction held in Federal  Bankruptcy  Court,  Southern  District of Indiana.  The
transaction,  which was accounted for as a purchase, included the acquisition of
in-process research and development valued at approximately $1,200,000, property
and equipment valued at approximately  $377,000 and purchased  technology valued
at approximately  $337,000.  The Company recorded a one-time charge in the first
quarter  of 1996 for the  $1,200,000  associated  with  purchased  research  and
development costs.

In July 1996, the Company acquired  certain assets of MPR Teltech,  a subsidiary
of BC TELCOM, Inc. The assets acquired were part of MPR Teltech's operating unit
commonly known as the Special Services Network division ("SSN"). The Company and
its Canadian subsidiary,  ADA-Canada, acquired the assets for $4,200,000 million
in  cash  and  150,000  shares  of the  Company's  common  stock,  and  incurred
approximately  $200,000 in related costs. SSN was an operations systems software
development  group with expertise in development of network  management  systems
for public carriers.  SSN developed  operations  systems software  primarily for
Northern Telecom ("Nortel").  SSN has become part of ADA-Canada and will develop
network  performance  management  operations  systems software  products for the
Company  and  its  customers,  including  Nortel.  The  transaction,  which  was
accounted for as a purchase, included the acquisition of in-process research and
development valued at approximately $2,100,000, property and equipment valued at
approximately  $900,000  and  goodwill  and  know-how  valued  at  approximately
$2,588,000.  The Company recorded a one-time charge in the third quarter of 1996
for the $2,100,000 associated with purchased research and development costs.

       The following condensed pro forma results of operations information
        has been presented to give effect to the acquisitions as if such
        transactions had occurred at the beginning of each of the periods
      presented. The historical results of operations have been adjusted to
       reflect additional depreciation and amortization expense based upon
            the value allocated to assets acquired in the purchases.
        The pro forma results of operations information is presented for
       information purposes only and is not necessarily indicative of the
      operating results that would have occurred had the acquisitions been
        consummated as of the beginning of the periods presented, nor is
             it necessarily indicative of future operating results.

<TABLE>
<CAPTION>

                    CONDENSED PRO FORMA RESULTS OF OPERATIONS
                    -----------------------------------------
                  (AMOUNTS IN THOUSANDS EXCEPT PER SHARE DATA)
                                   (UNAUDITED)

      Years Ended  December 31,                             1995                     1996
      ------------------------------------------------------------------------------------

<S>                                                       <C>                      <C>    
           Revenue                                        $38,747                  $29,660
           Net loss                                        (8,521)                  (7,474)
           Net loss per share                                (.71)                    (.61)
           Weighted average shares used in computation     11,956                   12,165

</TABLE>


Sales to Canadian customers, generated from both the Company's United States and
Canadian operations in fiscal 1997 were $4,351,000,  from which operating income
of $434,000 was  derived.  The  identifiable  assets of the  Company's  Canadian
operations at December 31, 1997 were $970,000


                                       21

<PAGE>

                  APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY

                       VALLUATION AND QUALIFYING ACCOUNTS
              For the Years Ended December 31, 1994, 1995 and 1996
                                   ----------
<TABLE>
<CAPTION>


                                             Balance at
                                              Beginning                                    Balance at
           Description              Year      of Year        Additions      Deductions    End of Year
           -------------------------------------------------------------------------------------------

<S>                                <C>       <C>            <C>            <C>            <C>      
Allowance for doubtful accounts    1994      $  50,000      $    --        $    --        $  50,000
                                   1995         50,000           --             --           50,000
                                   1996         50,000           --             --           50,000

Inventory reserve                  1994        301,476       247,661       (114,520)        434,617
                                   1995        434,617       150,000        (47,055)        537,562
                                   1996        537,562           --         (68,092)        469,470
</TABLE>


                        REPORT OF INDEPENDENT ACCOUNTANTS
                        ---------------------------------


TO THE BOARD OF DIRECTORS AND SHAREHOLDERS OF
  APPLIED DIGITAL ACCESS, INC. AND SUBSIDIARY


We have audited the accompanying  consolidated balance sheets of Applied Digital
Access,  Inc.  and  subsidiary  as of December 31, 1995 and 1996 and the related
consolidated  statements of operations,  shareholders' equity and cash flows for
each of the three years in the period ended December 31, 1996.  These  financial
statements   are  the   responsibility   of  the   Company's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

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

In our opinion, the consolidated  financial statements referred to above present
fairly, in all material respects, the consolidated financial position of Applied
Digital  Access,  Inc. and  subsidiary  as of December 31, 1995 and 1996 and the
consolidated  results of their  operations  and their cash flows for each of the
three years in the period ended December 31, 1996, in conformity  with generally
accepted accounting principles.




/s/ Coppers & Lybrand

San Diego, California
January 18, 1997


                                       22




<PAGE>

                       CONSENT OF INDEPENDENT ACCOUNTANTS

 We consent to the  incorporation by reference in the Registration  Statement of
Applied Digital Access, Inc. on Form S-8 of our report dated January 18, 1997 on
our audits of the  financial  statements  and  financial  statement  schedule of
Applied Digital Access, Inc. as of December 31, 1996 and 1995, and for the years
ended December 31, 1996,  1995 and 1994,  which report is included in the Annual
Report on Form 10-K of Applied Digital Access,  Inc. for the year ended December
31, 1996.


/s/ Coopers & Lybrand

San Diego, California
March 31, 1997

WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>


<ARTICLE>                     5
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                             DEC-31-1996
<CASH>                                           1,054
<SECURITIES>                                    19,957
<RECEIVABLES>                                    6,848
<ALLOWANCES>                                       (50)
<INVENTORY>                                      7,363
<CURRENT-ASSETS>                                36,841
<PP&E>                                           9,528
<DEPRECIATION>                                  (4,592)
<TOTAL-ASSETS>                                  45,972
<CURRENT-LIABILITIES>                            5,612
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        50,631
<OTHER-SE>                                       2,467
<TOTAL-LIABILITY-AND-EQUITY>                    45,972
<SALES>                                         24,422
<TOTAL-REVENUES>                                24,422
<CGS>                                           12,609
<TOTAL-COSTS>                                   12,609
<OTHER-EXPENSES>                                20,530
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 (6,997)
<INCOME-TAX>                                       123
<INCOME-CONTINUING>                             (7,120)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    (7,120)
<EPS-PRIMARY>                                    (0.59)
<EPS-DILUTED>                                    (0.59)
        


</TABLE>


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