STM WIRELESS INC
10-Q, 1998-08-14
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>   1

                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549

                                    FORM 10-Q
(Mark one)

[X]  Quarterly Report Pursuant to Section 13 or 15(d) of The Securities
     Exchange Act of 1934

                       FOR THE PERIOD ENDED JUNE 30, 1998

                                       or

[ ]  Transition Report Pursuant to Section 13 or 15(d) of The Securities
     Exchange Act of 1934

                           Commission File No. 0-19923


                               STM WIRELESS, INC.
             (Exact name of Registrant as specified in its charter)


         Delaware                                      95-3758983
(State or other jurisdiction                        (I.R.S. Employer
of incorporation or organization)                 Identification number)

         One Mauchly
      Irvine, California                                 92618
(Address of principal executive offices)              (Zip code)


                                 (949) 753-7864
              (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months and (2) has been subject to such filing requirements for
the last 90 days.

Yes  X      No
    ---        ---

As of August 13, 1998, there were 7,042,204 shares of Common Stock, $0.001 par
value, outstanding.


                                 Page 1 of 15

<PAGE>   2

                               STM WIRELESS, INC.


                                      INDEX

<TABLE>
<CAPTION>

PART I. FINANCIAL INFORMATION                                                    PAGE
                                                                                 -----
<S>                                                                              <C>
     Item 1.  Financial Statements

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

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

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

              Notes to Condensed Consolidated Financial Statements               6-8

     Item 2.  Management's Discussion and Analysis of  Results of
              Operations and Financial Condition                                9-12

PART II.      OTHER INFORMATION

     Item 5.  Other information                                                   13

     Item 6.  Exhibits and Reports on Form 8-K                                    13
</TABLE>


                                       2

<PAGE>   3

                         PART I - FINANCIAL INFORMATION

ITEM 1 - FINANCIAL STATEMENTS

                                STM WIRELESS, INC

                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (IN THOUSANDS)
                                     ASSETS
<TABLE>
<CAPTION>
                                                                  June 30,        December 31,
                                                                    1998             1997
                                                                 -----------     -------------
                                                                 (unaudited)
<S>                                                              <C>              <C>
Current assets:
    Cash and cash equivalents                                     $ 19,367         $  4,095
    Short-term investments                                           2,227            4,527
    Accounts receivable, net                                        15,551           10,937
    Inventories, net                                                14,970           11,211
    Current portion of long-term receivables                           592              592
    Deferred income taxes                                            3,132            3,132
                                                                  --------         --------
            Total current assets                                    55,839           34,494
Property and equipment, net                                         16,395           17,025
Long-term receivables                                                1,244            1,462
Other assets                                                         3,498            1,436
                                                                  --------         --------
                                                                  $ 76,976         $ 54,417
                                                                  ========         ========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
    Short-term borrowings                                         $ 11,250         $  7,900
    Current portion of long-term debt                                  303              328
    Accounts payable                                                13,753           11,597
    Accrued liabilities                                              7,490            2,139
    Customer deposits                                                1,696              130
    Income taxes payable                                               669              425
                                                                  --------         --------
            Total current liabilities                               35,161           22,519

Long-term debt                                                       4,451            4,577
Redeemable minority interest                                         6,055              259

Stockholders' equity:
    Preferred stock, $0.001 par value; 5,000,000
      shares authorized, none issued or outstanding                     --               --
    Common stock, $0.001  par value; 20,000,000 shares
      authorized; issued and outstanding 7,041,303 shares
      at June 30, 1998 and 6,448,164 shares at 
      December 31, 1997                                                  7                6
    Additional paid in capital                                      38,156           34,039
    Accumulated deficit                                             (6,620)          (6,983)
    Other comprehensive income (loss)                                 (234)              --
                                                                  --------         --------
            Total stockholders' equity                              31,309           27,062
                                                                  --------         --------
                                                                  $ 76,976         $ 54,417
                                                                  ========         ========
</TABLE>

           See accompanying notes to consolidated financial statements


                                       3


<PAGE>   4

                               STM WIRELESS, INC.

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

<TABLE>
<CAPTION>
                                              For the three months       For the six months
                                                  ended June 30,            ended June 30,
                                              ---------------------     ---------------------
                                                1998         1997         1998         1997
                                              --------     --------     --------     --------
<S>                                           <C>          <C>          <C>          <C>
Revenues:
     Products                                 $  8,633     $ 15,938     $ 14,953     $ 23,548
     Services                                      475          304        1,104          921
                                              --------     --------     --------     --------
         Total revenues                          9,108       16,242       16,057       24,469
Cost of revenues:
     Products                                    6,281       11,449       11,552       16,476
     Services                                      686          279        1,404          616
                                              --------     --------     --------     --------
         Total cost of revenues                  6,967       11,728       12,956       17,092

Gross profit                                     2,141        4,514        3,101        7,377

Operating costs and other operating items:
     Selling, general and administrative         3,161        2,218        6,029        3,659
     Research and development                    2,906        1,482        4,964        2,782
     Gain on sale of assets                     (9,950)          --       (9,950)          --
     Move and relocation charges                   980           --          980           --
                                              --------     --------     --------     --------
         Total                                  (2,903)       3,700        2,023        6,441

Operating income                                 5,044          814        1,078          936

     Other income (expense)                        (36)          49          (90)          66
     Interest income                               219          175          358          325
     Interest expense                             (326)        (249)        (629)        (390)
                                              --------     --------     --------     --------
Income before income taxes and minority          
  interest                                       4,901          789          717          937
     Income tax expense                           (244)        (108)        (244)        (132)
                                              --------     --------     --------     --------
Income before minority interest                  4,657          681          473          805
     Minority interest                            (223)          45         (110)          72
                                              --------     --------     --------     --------
Net income                                    $  4,434     $    726     $    363     $    877
                                              ========     ========     ========     ========

Net income per common share:
     Basic                                    $   0.63     $   0.11     $   0.05     $   0.14
                                              ========     ========     ========     ========
     Diluted                                  $   0.60     $   0.11     $   0.05     $   0.14
                                              ========     ========     ========     ========

Common shares used in computing
   per share:
     Basic                                       7,035        6,369        6,828        6,354
     Diluted                                     7,340        6,450        7,072        6,432
</TABLE>


          See accompanying notes to consolidated financial statements.

                                       4

<PAGE>   5

                               STM WIRELESS, INC.

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

<TABLE>
<CAPTION>
                                                                  For the six months
                                                                     ended June 30,
                                                                -------------------------
                                                                  1998             1997
                                                                --------         --------
<S>                                                             <C>              <C>
Net cash (used in) provided by operating activities             $   (223)        $  1,303
                                                                --------         --------

Cash flows provided by (used in) investing activities:
    Net decrease in short-term investments                         2,300               --
    Acquisition of property, plant and equipment                    (245)            (654)
                                                                --------         --------
Net cash provided by (used in) investing activities                2,055             (654)
                                                                --------         --------

Cash flows from financing activities:
    Net decrease in long-term receivables                            218              261
    Issuance of common stock                                       4,118              405
    Issuance of redeemable preferred stock in subsidiary           5,905               --
    Net increase (decrease) in short-term borrowings               3,350           (4,800)
    Repayments of long-term debt                                    (151)            (192)
                                                                --------         --------
Net cash provided  by (used in) financing activities              13,440           (4,326)
                                                                --------         --------

Net increase (decrease)  in cash and cash equivalents             15,272           (3,677)

Cash and cash equivalents at beginning of period                   4,095           10,453
                                                                --------         --------

Cash and cash equivalents at end of period                      $ 19,367         $  6,776
                                                                ========         ========
</TABLE>


          See accompanying notes to consolidated financial statements.


                                       5

<PAGE>   6

                               STM WIRELESS, INC.

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

                     SIX MONTHS ENDED JUNE 30, 1998 AND 1997
                                   (Unaudited)

1.  BASIS OF PRESENTATION

        These financial statements are unaudited; however, the information
contained herein for STM Wireless, Inc. (the "Company" or "STM") gives effect to
all adjustments (which are normal recurring accruals) necessary, in the opinion
of Company management, to present fairly the financial statements for the
interim periods presented. The results for 1998 reflect the sale of TMSI in June
1998. The results for the period ended June 30, 1997 have been restated to
include the results of Telecom International, Inc. (TI), which was acquired in
December 1997 and has been accounted for as a pooling of interests.

        The results of operations for the current interim period are not
necessarily indicative of the results to be expected for the current year.

        Although the Company believes that the disclosures in these financial
statements are adequate to make the information presented not misleading,
certain information and footnote disclosures normally included in financial
statements prepared in accordance with generally accepted accounting principles
have been condensed or omitted pursuant to the rules and regulations of the
Securities and Exchange Commission (the "SEC"), and these financial statements
should be read in conjunction with the financial statements included in the
Company's Annual Report on Form 10-K for the year ended December 31, 1997, which
is on file with the SEC.

2.  INVENTORIES

        Inventories are summarized as follows:

<TABLE>
<CAPTION>
                                           June 30,           December 31,
                                             1998                 1997
                                           --------           ------------
<S>                                        <C>                  <C>
Raw materials                              $  9,212             $  5,727
Work in process                               4,187                  980
Finished goods                                1,571                4,504
                                           ========             ========
                                           $ 14,970             $ 11,211
                                           ========             ========
</TABLE>


                                       6

<PAGE>   7

3.       NET INCOME PER SHARE

        Effective December 31, 1997, the Company adopted SFAS No. 128, "Earnings
per Share". This statement replaces the previously reported primary and fully
diluted earnings per share with basic and diluted earnings per share. Unlike
primary earnings per share, basic earnings per share excludes any dilutive
effects of options. Diluted earnings per share is very similar to the previously
reported fully diluted earnings per share. Net income per share for the three
and six month periods ended June 30, 1997 have been restated in accordance with
SFAS 128. The following table summarizes the computation of net income per share
(in thousands, except per share data):


<TABLE>
<CAPTION>
                                                Three Months Ended       Six Months Ended
                                                     June 30,                June 30,
                                                ------------------      ------------------
                                                 1998        1997        1998        1997
                                                ------      ------      ------      ------
<S>                                             <C>         <C>        <C>         <C>
NET INCOME                                      $4,434      $  726      $  363      $  877
                                                ======      ======      ======      ======
BASIC:
Weighted average common shares
  outstanding used in computing
  basic net income per share                     7,035       6,369       6,828       6,354
                                                ======      ======      ======      ======
Basic net income per share                      $ 0.63      $ 0.11      $ 0.05      $ 0.14
                                                ======      ======      ======      ======
DILUTED:
Weighted average common shares outstanding       7,035       6,369       6,828       6,345
Dilutive options outstanding                       305          81         244          87
                                                ------      ------      ------      ------
Shares used in computing diluted net
  income per share                               7,340       6,450       7,072       6,432
                                                ======      ======      ======      ======
Diluted net income per share                    $ 0.60      $ 0.11      $ 0.05      $ 0.14
                                                ======      ======      ======      ======
</TABLE>


4.       RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS

        In June 1997, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards No. 130 ("SFAS No. 130") "Reporting
Comprehensive Income," which establishes standards for reporting and disclosures
of comprehensive income and its components (revenues, expenses, gains and
losses) in a full set of general purpose financial statements. SFAS No. 130 is
effective for fiscal years beginning after December 15, 1997 and requires
reclassification of financial statements for earlier periods to be provided for
comparative purposes. The Company has not determined the manner in which it will
present the information required by SFAS No. 130 in its annual consolidated
financial statements for the year ending December 31, 1998. The Company's total
comprehensive income (loss) for all periods presented herein would not have
differed materially from those amounts reported as net income (loss) in the
consolidated statements of operations.


                                       7


<PAGE>   8

        Also in June 1997, the FASB issued SFAS No. 131, "Disclosure About
Segments of an Enterprise and Related Information." The Statement establishes
standards for the manner in which public business enterprises report information
about operating segments in annual financial statements and requires those
enterprises to report selected information about operating segments in interim
financial reports issued to shareholders. This Statement is effective for annual
financial statements for periods beginning after December 15, 1997, and for
interim periods after the first year of adoption. The Company has not yet
determined the impact of adopting these disclosure requirements.

        In June 1998, the Financial Accounting Standards Board issued statement
of Financial Accounting Standards No. 133, "Accounting for Derivative
Instruments and Hedging Activities" ("SFAS 133"). SFAS 133 is effective for all
fiscal quarters or fiscal years beginning after June 15, 1999. SFAS 133
establishes accounting and reporting standards for derivative instruments
embedded in other contracts and for hedging activities. Application of SFAS 133
is not expected to have a material impact on the Company's consolidated
financial position, results of operations or liquidity.

5.  ISSUANCE OF SHARES

        In March of 1998, the Company completed a $10 million equity offering of
common stock of STM and mandatory redeemable preferred stock of its
Direc-To-Phone International (DTPI) subsidiary. Concurrently with and as a
condition of this transaction, the Company also invested $5 million of equity in
DTPI, extended a $10 million loan and entered into a Product Supply Agreement
with DTPI. The principal on the loan is repayable by DTPI out of the proceeds of
any future financings of DTPI that may occur. The proceeds from the issuance of
the mandatory redeemable preferred stock in DTPI plus accrued dividends have
been classified as redeemable minority interest in the accompanying Condensed
Consolidated Balance sheet at June 30, 1998.

        The mandatory redeemable shares in DTPI are redeemable at the option of
the holder (if not sooner converted into common stock of DTPI), on the 5th
anniversary of the date of issuance, or in the event of an acquisition of STM
and STM continues to hold greater than 50% of the voting stock of DTPI. The
redemption amount is equal to $6,000,000 plus dividends of $0.50 per share per
annum accruing from the date of issuance.


6.  GAIN ON SALE OF ASSETS

        In June, 1998, the Company completed the sale of its majority-owned
subsidiary, Telecom Multimedia Systems, Inc. (TMSI) to Inter-Tel, Inc.
(Inter-Tel), pursuant to which Inter-Tel agreed to purchase certain assets and
assume certain liabilities of TMSI for approximately $25 million in cash. A gain
of $9,950,000 (net of costs and reserves considered necessary) was realized and
is included in the accompanying Condensed Consolidated Statement of Operations
for the three and six-month month periods ending June 30, 1998.


7.  RECLASSIFICATIONS

        Certain reclassifications have been made to the 1997 consolidated
financial statements to conform to the 1998 presentation.


                                       8

<PAGE>   9

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

General

        STM Wireless, Inc. (the "Company" or "STM"), founded in 1982, is a
developer, manufacturer and provider of wireless-based satellite communications
infrastructure and user terminal products utilized in public and private
telecommunications networks. These networks support data, fax, voice and video
communication and are used to either bypass or extend terrestrial networks or
provide a communications infrastructure where a network does not currently
exist. The Company's product line is based on proprietary hardware and software
and primarily consists of two-way earth stations sometimes referred to as VSATs
(very small aperture terminals), associated infrastructure equipment and
software, transceivers, modems and other networking equipment. The Company
currently focuses its sales efforts on the international marketplace,
particularly developing countries. The Company's subsidiary, Direc-To-Phone
International, Inc. ("DTPI"), provides fixed telephony services in areas of
lower population density in international markets. The Company's subsidiary,
Telecom International, Inc.("TI"), is a systems integrator within the satellite
communications industry.


Results of Operations

        Combined product and service revenues were $9,108,000 and $16,057,000,
respectively, for the three and six-month periods ended June 30, 1998, compared
to $16,242,000 and $24,469,000, respectively, for the corresponding periods of
1997, representing decreases of 44% and 34%, respectively, over the prior year
periods. Product revenues were $8,633,000 and $14,953,000, respectively, for the
three and six-month periods ended June 30, 1998, compared to $15,938,000 and
$23,548,000, respectively, for the corresponding periods in 1997, representing
decreases of 46% and 36%, respectively, over the prior year periods. In 1997,
the Company benefited from shipments related to a $30,000,000 contract for a
rural telephony network in Southeast Asia. The Company believes that the
diversion of management attention to the setting up of the DTPI service business
and the Asian financial crisis are the primary reasons it has not been able to
obtain follow-on, or new contracts during the current year in Asia. The Company
has redirected its sales efforts to Latin America, Africa and the Middle East.
However, there can be no assurance that such efforts will generate any revenue,
or a specific level of revenue. Service revenues were $475,000 and $1,104,000,
respectively, for the three and six-month periods ended June 30, 1998, compared
to $304,000 and $921,000, respectively, for the corresponding periods in 1997,
representing increases of 56% and 20%, respectively, from the prior year
periods. The increases reflect service revenues by DTPI which did not exist in
the prior year.

        Combined product and service gross profit margins in the three and
six-month periods ended June 30, 1998, were 24% and 19%, respectively, compared
to 28% and 30%, respectively, for the comparable periods in 1997. Product gross
profit margins in


                                       9


<PAGE>   10

the three and six-month periods ended June 30, 1998, were 27% and 23%,
respectively, compared to 28% and 30%, respectively, for the comparable periods
in 1997. These decreases in product gross profit margins were primarily due to
higher systems integration sales contents in 1998 revenues compared to 1997, at
relatively lower gross profit percentages compared to core manufacturing product
sales, and the impact of lower factory through-put in 1998 compared to 1997. The
gross profit margin may be impacted on an ongoing basis depending upon the mix
between system integration sales and core manufacturing sales. Service gross
profit margins in the three and six-month periods ended June 30, 1998, were
negative 44% and negative 27%, respectively, compared to positive 8% and
positive 33%, respectively, for the comparable periods in 1997. The negative
service gross margins were due to investment in the infrastructure associated
with setting up the DTPI service business.

        Selling, general, and administrative (SG&A) expenses for the three-month
period ended June 30, 1998, increased to $3,161,000 from $2,218,000, and
increased as a percentage of revenue from 14% to 35%. For the six months ended
June 30, 1998, such expenses increased to $6,029,000 from $3,659,000, and
increased as a percentage of revenue from 15% to 38%. The increases in
expenditures for the three-month period ended June 30, 1998 were due to costs
associated with DTPI. For the six months ended June 30, 1998, the increases were
related to SG&A costs associated with DTPI (which did not exist in the prior
year) along with general cost increases. In addition, SG&A for the six months
ended June 30, 1997 was reduced by $400,000 due to the reversal of a reserve, no
longer required, for a potential customer concession.

        Research and development expenses for the three-month period ended June
30, 1998, increased to $2,906,000, or 32% of revenues, from $1,482,000, or 9% of
revenues, in the corresponding period of 1997. For the six-month period ended
June 30, 1998, such expenses increased to $4,964,000, or 31% of revenues, from
$2,782,000, or 11% of revenues, in the corresponding period in 1997. The
increases were primarily related to a one-time charge of $1,400,000 in the three
months ended June 30, 1998 for a contractually committed R&D project with no
discernable future benefit, and for ongoing development of the Company's
SpaceWeb and SES products.

        The gain on sale of assets of $9,950,000 represented a gain (net of
costs and reserves considered necessary) on the sale of substantially all the
assets of the Company's majority owned subsidiary TMSI.

        The move and relocation charges of $980,000 primarily comprised
severance, relocation, and move costs incurred in connection with the
consolidation of the Company's Network Systems Division in Georgia.

        Interest income increased by $44,000 to $219,000 for the three-month
period ended June 30, 1998 over the three-month period ended June 30, 1997.
Interest income increased by $33,000 to $358,000 for the six-month period ended
June 30, 1998, over the six-month period ended June 30, 1997. The increase in
interest income for both periods was due primarily to higher cash balances
resulting from the sale for cash of substantially all of the assets of the
subsidiary mentioned above.

        Interest expense increased by $77,000 to $326,000 for the three-month
period ended June 30, 1998, over the three-month period ended June 30, 1997.
Interest expense


                                       10


<PAGE>   11

increased by $239,000 to $629,000 for the six-month period ended June 30, 1998,
over the six-month period ended June 30, 1997. The increases were primarily due
to an increase in short term borrowings from banks.

        The tax provision of $244,000 represents the Company's estimated tax
provision on its income for the six months ended June 30, 1998.

Liquidity and Capital Resources

        In connection with the award of certain long-term service contracts in
Mexico and Venezuela, and due to the capital intensive nature of these
contracts, and other contracts that DTPI may be awarded in the future, the
Company is reviewing financing alternatives to enable it to pursue these
business opportunities in the most beneficial manner. However, there can be no
assurance that such financing will be available, or that such financing will be
available on terms acceptable to the Company.

        In March of 1998, the Company completed a $10 million equity offering of
common stock of STM and mandatory redeemable preferred stock of its
Direc-To-Phone International (DTPI) subsidiary. Concurrently with and as a
condition of this transaction, the Company also invested $5 million of equity in
DTPI, extended a $10 million loan and entered into a Product Supply Agreement
with DTPI. The principal on the loan is repayable by DTPI out of the proceeds of
any future financings of DTPI that may occur. The proceeds from the issuance of
the mandatory redeemable preferred stock in DTPI plus accrued dividends have
been classified as minority interest in the accompanying Condensed Consolidated
Balance sheet at June 30, 1998.

        The mandatory redeemable shares in DTPI are redeemable at the option of
the holder (if not sooner converted into common stock of DTPI), on the 5th
anniversary of the date of issuance, or in the event of an acquisition of STM
and STM continues to hold greater than 50% of the voting stock of DTPI. The
redemption amount is equal to $6,000,000 plus dividends of $0.50 per share per
annum accruing from the date of issuance.

        In June, 1998, the Company completed the sale of its majority-owned
subsidiary, Telecom Multimedia Systems, Inc. (TMSI) to Inter-Tel, Inc.
(Inter-Tel), pursuant to which Inter-Tel agreed to purchase certain assets and
assume certain liabilities of TMSI for approximately $25 million in cash. A gain
of $9,950,000 (net of costs and reserves considered necessary) was realized and
is included in the accompanying Condensed Consolidated Statement of Operations
for the three and six-month month periods ending June 30, 1998.

        For the first six months of 1998, the Company had negative cash flows
from operations of $223,000, compared to positive cash flows of $1,303,000 in
the same period of 1997. The decrease in cash flows from operations was
primarily due to increased investments in accounts receivable, inventories, and
other assets; partially offset by increases in accounts payable, accrued
liabilities, and customer deposits.


                                       11


<PAGE>   12

        Cash flows from investing provided $2,055,000 during the first six
months of 1998. The sale of short-term investments provided $2,300,000, while
cash used in acquisition of fixed assets totaled $245,000.

        Cash provided by financing activities during the first six months of
1998 totaled $13,440,000. An increase in short-term borrowings provided
$3,350,000 while repayment of long-term debt used $151,000. A decrease in
long-term receivables provided $218,000. Proceeds from an equity offering
totaled $9,905,000; $4,000,000 from the issuance of common stock in the Company
and $5,905,000 from the issuance of redeemable preferred stock in a subsidiary.
Proceeds from the exercise of employee stock options provided $118,000.

        Overall, the Company's cash, cash equivalents, and short-term
investments totaled $21,594,000 at June 30, 1998, as compared to $8,622,000 at
December 31, 1997.

        Management expects to have sufficient cash generated through operations,
through availability under credit lines and through other sources to meet the
anticipated cash requirements for the next 12 months.

Year 2000

        The Company has performed a preliminary examination of its major
software applications to determine whether each system is prepared to
accommodate the year 2000. This examination included a review of program code
which is maintained by the Company as well as obtaining confirmation from
outside software vendors that their products are year 2000 compliant. The
Company believes that, based on its current examination, the year 2000 will not
have a material adverse impact on the Company's operations and that the costs
to accommodate the year 2000 will not be material. However, there can be no
assurance that software incompatibility with the year 2000 on the part of the
Company or any of its significant suppliers will not cause an interruption of
operations or other limitations of system functionality, or that the Company
will not incur substantial costs to avoid such occurrences. By the end of 1998,
the Company plans to complete an extensive assessment of the readiness of its
software applications with respect to year 2000 issues and any related
accommodation costs.

Risk Factors and Forward Looking Statements

        THIS DOCUMENT CONTAINS CERTAIN FORWARD LOOKING STATEMENTS WITHIN THE
MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933, AS AMENDED, AND SECTION
21E OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, THAT INVOLVE RISKS AND
UNCERTAINTIES. IN ADDITION, THE COMPANY MAY FROM TIME TO TIME MAKE FORWARD
LOOKING STATEMENTS, ORALLY OR IN WRITING. THE WORDS "ESTIMATE", "PROJECT",
"POTENTIAL", "INTENDED", "EXPECT", "BELIEVE" AND SIMILAR EXPRESSIONS OR WORDS
ARE INTENDED TO IDENTIFY FORWARD LOOKING STATEMENTS. ACTUAL RESULTS COULD DIFFER
MATERIALLY FROM THOSE PROJECTED OR SUGGESTED IN ANY FORWARD LOOKING STATEMENTS
AS A RESULT OF A WIDE VARIETY OF FACTORS AND CONDITIONS, AMONG OTHERS, LONG TERM
CYCLES INVOLVED IN COMPLETING MAJOR CONTRACTS, PARTICULARLY IN FOREIGN MARKETS,
INCREASING COMPETITIVE PRESSURES, GENERAL ECONOMIC CONDITIONS, TECHNOLOGICAL
ADVANCES, THE TIMING OF NEW PRODUCT INTRODUCTIONS, POLITICAL AND ECONOMIC RISKS
INVOLVED IN FOREIGN MARKETS AND FOREIGN CURRENCIES AND THE TIMING OF OPERATING
AND OTHER EXPENDITURES. REFERENCE IS HEREBY MADE TO "RISK FACTORS" IN THE
COMPANY'S FOR 10-K FOR THE YEAR ENDED DECEMBER 31, 1997.

        BECAUSE OF THESE AND OTHER FACTORS THAT MAY AFFECT THE COMPANY'S
OPERATING RESULTS, PAST FINANCIAL PERFORMANCE SHOULD NOT BE CONSIDERED AN
INDICATOR OF FUTURE PERFORMANCE, AND INVESTORS SHOULD NOT USE HISTORICAL TRENDS
TO ANTICIPATE RESULTS OR TRENDS IN FUTURE PERIODS.


                                       12

<PAGE>   13

PART II -- OTHER INFORMATION


Item 5 -- Other Information

        On May 21, 1998 the Securities and Exchange Commission adopted an
amendment to Rule 14a-4, as promulgated under the Securities and Exchange Act of
1934. The amendment to Rule 14a-4(c)(1) governs the Company's use of its
discretionary proxy voting authority with respect to a shareholder proposal
which the shareholder has not sought to include in the Company's proxy
statement. The new amendment provides that if a proponent of a proposal fails to
notify the company at least 45 days prior to the month and day of mailing of the
prior year's proxy statement, then the management proxies will be allowed to use
their discretionary voting authority when the proposal is raised at the meeting,
without any discussion of the matter in the proxy statement.

        With respect to the Company's 1999 Annual Meeting of Shareholders, if
the Company is not provided notice of a shareholder proposal, which the
shareholder has not previously sought to include in the Company's proxy
statement, by February 15, 1999, the management proxies will be allowed to use
their discretionary authority as outlined above.

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

(a)  Exhibits


Exhibit
  No.       Description
- -------     -----------
 10.29      Asset Purchase Agreement by and among Inter-Tel, Incorporated,
            Telecom Multimedia Systems, Inc., STM Wireless, Inc., Ramin Sadr and
            Farshad Meshkinpour, dated May 10, 1998.

 10.30      Escrow Agreement, dated June 18, 1998, by and among STM Wireless,
            Inc., Telecom Multimedia Systems, Inc., Ramin Sadr, Farshad
            Meshkinpour, Inter-Tel Incorporated and Bank One, Arizona, NA.

 27.1       Financial Data Schedule for June 30, 1997

 27.2       Financial Data Schedule for June 30, 1998

(b)  Reports on Form 8-K

        The Company did not file any reports on Form 8-K during the quarter
ending June 30, 1998.


                                       13


<PAGE>   14

                                   SIGNATURES

        Pursuant to the requirements 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.

                                              STM Wireless, Inc.

Date: August 13, 1998                         By: JOSEPH WALLACE
                                                  ------------------------------
                                                  Joseph Wallace
                                                  Vice President, Finance and
                                                  Chief Financial Officer
                                                  (Principal Financial and 
                                                  Accounting Officer and
                                                  Duly Authorized Officer)



                                       14

<PAGE>   15

                                EXHIBIT INDEX


Exhibit
  No.       Description
- -------     -----------
 10.29      Asset Purchase Agreement by and among Inter-Tel, Incorporated,
            Telecom Multimedia Systems, Inc., STM Wireless, Inc., Ramin Sadr and
            Farshad Meshkinpour, dated May 10, 1998.

 10.30      Escrow Agreement, dated June 18, 1998, by and among STM Wireless,
            Inc., Telecom Multimedia Systems, Inc., Ramin Sadr, Farshad
            Meshkinpour, Inter-Tel Incorporated and Bank One, Arizona, NA.

 27.1       Financial Data Schedule for June 30, 1997

 27.2       Financial Data Schedule for June 30, 1998


<PAGE>   1

                                                                   EXHIBIT 10.29

                            ASSET PURCHASE AGREEMENT

                                  BY AND AMONG

                             INTER-TEL, INCORPORATED

                        TELECOM MULTIMEDIA SYSTEMS, INC.,

                               STM WIRELESS, INC.,

                                 RAMIN SADR AND

                               FARSHAD MESHKINPOUR

                            DATED AS OF MAY 11, 1998


                                TABLE OF CONTENTS

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<PAGE>   2

                            ASSET PURCHASE AGREEMENT


        This Asset Purchase Agreement ("Agreement") is made as of May 11, 1998,
by and among Inter-Tel, Incorporated, an Arizona corporation ("Buyer"), Telecom
Multimedia Systems, Inc., a California corporation (the "Company"), STM
Wireless, Inc. a Delaware corporation and a shareholder of the Company
("Parent"), Ramin Sadr, an individual resident in California and a shareholder
of the Company ("Sadr"), and Farshad Meshkinpour, an individual resident in
California and a shareholder of the Company ("Meshkinpour" and collectively with
Parent and Sadr, "Shareholders").

                                    RECITALS

        1. Shareholders and the Company desire to sell, and Buyer desires to
purchase, certain assets (and assume certain liabilities) of the Company, for
the consideration and on the terms set forth in this Agreement.

        2. As of the date of this Agreement, Parent owns 80% of the outstanding
Shares (as defined below) of the Company, Sadr owns 13% of the Shares of the
Company and Meshkinpour owns 7% of the Shares of the Company.

        3. The Company and Shareholders desire to enter into this Agreement for
the purpose of setting forth certain representations, warranties, covenants and
other obligations made in connection with the purchase and sale of the Acquired
Assets (as defined below) and the Assumption of the Assumed Liabilities (as
defined below).

        4. In connection with and as a condition subsequent to the execution and
delivery of this Agreement, as a condition precedent to the Closing (as defined
below), and in consideration of the respective obligations of the parties set
forth in this Agreement and the Contemplated Transactions (as defined below),
Parent, Meshkinpour and Sadr shall, immediately prior to the consummation of the
purchase and sale of the Acquired Assets and Assumed Liabilities contemplated
hereby, enter into and consummate a Share Purchase Agreement, pursuant to which
Parent shall purchase all of the Shares held by Sadr and Meshkinpour.

                                    AGREEMENT

        The parties, in consideration of the premises, the mutual
representations, warranties, covenants, obligations and agreements herein set
forth and for other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, and intending to be legally bound, agree as
follows:

        For purposes of this Agreement, the following terms have the meanings
specified or referred to in this Section 1:

        "ACQUIRED ASSETS" means all right, title, and interest in and to all of
the assets of the Acquired Companies, including all of their (a) real property,
leaseholds and subleaseholds therein, improvements, fixtures, and fittings
thereon, and easements, rights-of-way, and other appurtenants thereto (such as
appurtenant rights in and to public streets), (b) tangible personal property
(such as 

<PAGE>   3

machinery, equipment, inventories of raw materials and supplies, manufactured
and purchased parts, goods in process and finished goods, computers and other
office equipment, furniture, automobiles, trucks, tractors, trailers, tools,
jigs, and dies), (c) Intellectual Property Assets (including without limitation
all rights and obligations under the Named Contracts), goodwill associated
therewith, licenses and sublicenses granted and obtained with respect thereto,
and rights thereunder, remedies against infringements thereof, and rights to
protection of interests therein under the laws of all jurisdictions, (d) leases,
subleases, and rights thereunder, (e) agreements, contracts, indentures,
mortgages, instruments, Encumbrances, guaranties, other similar arrangements,
and rights thereunder, (f) accounts, notes, and other receivables, (g)
securities (such as the capital stock in its Subsidiaries), (h) claims,
deposits, prepayments, refunds, causes of action, chooses in action, rights of
recovery, rights of set off, and rights of recoupment (excluding any such item
relating to Taxes), (i) franchises, approvals, permits, licenses, orders,
registrations, certificates, variances, and similar rights obtained from
governments and governmental agencies, (j) books, records, ledgers, files,
documents, correspondence, lists, customer lists, plats, architectural plans,
drawings, and specifications, creative materials, advertising and promotional
materials, studies, reports, and other printed or written materials, and (k)
Cash (other than Cash resulting from accounts receivable reflected on the
Interim Balance Sheet); provided, however, that the Acquired Assets shall not
include (i) the corporate charter, qualifications to conduct business as a
foreign corporation, arrangements with registered agents relating to foreign
qualifications, taxpayer and other identification numbers, seals, minute books,
stock transfer books, blank stock certificates, and other documents relating to
the organization, maintenance, and existence of the Company as a corporation or
(ii) any of the rights of the Company under this Agreement (or under any side
agreement between the Company on the one hand and the Buyer on the other hand
entered into on or after the date of this Agreement) or (iii) any Excluded
Asset.

        "ACQUIRED COMPANIES" --the Company and its Subsidiaries, collectively.

        "APPLICABLE CONTRACT" --any Contract (a) under which any Acquired
Company has or may acquire any rights, (b) under which any Acquired Company has
or may become subject to any obligation or liability, or (c) by which any
Acquired Company or any of the assets owned or used by it is or may become
bound.

        "ASSUMED LIABILITIES" means (a) all obligations of the Company pursuant
to the agreements, contracts, leases, licenses, and other arrangements referred
to in the definition of Acquired Assets, and (b) all other Liabilities and
obligations of the Company set forth in an appendix to the Disclosure Schedule
under an express statement (that the Buyer has initialed) to the effect that the
definition of Assumed Liabilities will include the Liabilities and obligations
so disclosed; provided, however, that the Assumed Liabilities shall not include
(i) any Liability of the Company for Taxes, including for this purpose sales,
use or similar transfer Taxes, if any, attributable to this transaction, (ii)
any Liability of the Company for the unpaid Taxes of any Person under Reg.
ss.1.1502-6 (or any similar provision of state, local, or foreign law), as a
transferee or successor, by contract, or otherwise, (iii) any obligation of the
Company to indemnify any Person by reason of the fact that such Person was a
director, officer, employee, or agent of any of the Company or its Subsidiaries
or was serving at the request of any such entity as a partner, trustee,
director, officer, employee, or agent of another entity (whether such
indemnification is for judgments, damages, penalties, fines, costs, amounts paid
in settlement, losses, expenses, or otherwise and whether such indemnification
is pursuant to any statute, charter document, bylaw, agreement, or otherwise),
(iv) any Liability of the 

<PAGE>   4

Company for costs and expenses incurred in connection with this Agreement and
the Contemplated Transactions, (v) any Liability or obligation of the Company
pursuant to this Agreement (or pursuant to any side agreement between the
Company on the one hand and the Buyer on the other hand entered into on or after
the date of this Agreement), or (vi) any Liability of any Acquired Company to
the Parent or the Key Executives (other than as set forth on the Interim Balance
Sheet).

        "ASSUMED OPTIONS" --the Options assumed by Buyer pursuant to Section 2.6
and the Substitution Agreements.

        "BALANCE SHEET" --as defined in Section 3.4.

        "BEST EFFORTS" --the commercially reasonable efforts that a prudent
Person desirous of achieving a result would use in similar circumstances to
ensure that such result is achieved as expeditiously as possible; provided,
however, that an obligation to use Best Efforts under this Agreement does not
require the Person subject to that obligation to take actions that would result
in a materially adverse change in the benefits to such Person of this Agreement
and the Contemplated Transactions.

        "BREACH" --a "Breach" of a representation, warranty, covenant,
obligation, or other provision of this Agreement or any instrument delivered
pursuant to this Agreement will be deemed to have occurred if there is or has
been (a) any inaccuracy in or breach of, or any failure to perform or comply
with, such representation, warranty, covenant, obligation, or other provision,
or (b) any claim (by any Person) or other occurrence or circumstance that is or
was inconsistent with such representation, warranty, covenant, obligation, or
other provision, and the term "Breach" means any such inaccuracy, breach,
failure, claim, occurrence, or circumstance.

        "BUYER" --as defined in the first paragraph of this Agreement.

        "BUYER COMMON STOCK" --the Common Stock, no par value, of Buyer.

        "CASH" means cash and cash equivalents (including marketable securities
and short term investments) calculated in accordance with GAAP.

        "CASH-OUT OPTIONS" --all Options that are not Assumed Options.

        "CASH-OUT OPTION AMOUNT" -- $555,560.

        "CLOSING" --as defined in Section 2.4.

        "CLOSING DATE" --the date and time as of which the Closing actually
takes place.

        "CODE" --the Internal Revenue Code of 1986, as amended

        "COMPANY" --as defined in the first paragraph of this Agreement.

        "COMPANY EMPLOYEE PLAN" --any plan, program, policy, practice, contract,
agreement or other arrangement providing for compensation, severance,
termination pay, performance awards, 

<PAGE>   5

stock or stock-related awards, fringe benefits or other employee benefits or
remuneration of any kind, whether written or unwritten or otherwise, funded or
unfunded, including without limitation, each "employee benefit plan," within the
meaning of Section 3(3) of ERISA which is or has been maintained, contributed
to, or required to be contributed to, by each Acquired Company or any Affiliate
(as defined in Section 3.13) for the benefit of any Employee.

        "CONSENT" --any approval, assignment of rights or obligations, consent,
ratification, waiver, or other authorization (including any Governmental
Authorization).

        "CONTEMPLATED TRANSACTIONS" --all of the transactions contemplated by
this Agreement, including:

               (a) the sale of the Acquired Assets by the Company to Buyer and
Buyer's acquisition and ownership of the Acquired Assets and exercise of control
over the Acquired Assets;

               (b) the execution, delivery, and performance of the Employment
Agreements, the Releases and the Escrow Agreement;

               (c) the performance by Buyer, the Company and Shareholders of
their respective covenants and obligations under this Agreement.

        "CONTRACT" --any agreement, contract, obligation, promise, or
undertaking (whether written or oral and whether express or implied) that is
legally binding.

        "DAMAGES" --as defined in Section 12.2.

        "DISCLOSURE LETTER" --the disclosure letter delivered by the Company and
Shareholders to Buyer concurrently with the execution and delivery of this
Agreement.

        "$" and "DOLLARS" --United States dollars.

        "EMPLOYEE" --any current employee, officer, or director of each Acquired
Company or any Affiliate.

        "EMPLOYEE AGREEMENT" --each management, employment, severance,
consulting, relocation, repatriation, expatriation, visas, work permit or
similar agreement or contract between each Acquired Company or any Affiliate and
any Employee or consultant.

        "EMPLOYMENT AGREEMENTS" --Employment, Confidential Information,
Invention Assignment and Arbitration Agreements, which the Buyer has entered
into with each of the Key Executives and certain other former key employees or
consultants of the Company.

        "ENCUMBRANCE" --any charge, claim, community property interest,
condition, equitable interest, lien, option, pledge, security interest, right of
first refusal, or restriction of any kind, including any restriction on use,
voting, transfer, receipt of income, or exercise of any other attribute of
ownership.

        "ENVIRONMENTAL LAWS" --as defined in Section 3.19.

<PAGE>   6

        "ERISA" --the Employee Retirement Income Security Act of 1974 or any
successor law, and regulations and rules issued pursuant to that Act or any
successor law.

        "ESCROW AGENT" --as named in Section 2.5.

        "ESCROW AGREEMENT" --as defined in Section 2.5.

        "ESCROW AMOUNT" --the sum of (x) $1,000,000 being deposited in escrow on
behalf of the Parent plus (y) $809,538 being deposited in escrow on behalf of
Sadr plus (z) $435,998 being deposited in escrow on behalf of Meshkinpour (plus
any interest accrued thereon and less any funds disbursed to any Indemnified
Person or Shareholder).

        "EXCLUDED ASSETS" --the following assets, properties and rights of the
Company:

               (a) accounts receivable as of March 31, 1998; and

               (b) bank accounts in the name of Telecom Multimedia Systems, Inc.

        "FACILITIES" --any real property, leaseholds, or other interests
currently or formerly owned or operated by any Acquired Company and any
buildings, plants, structures, or equipment (including motor vehicles, tank
cars, and rolling stock) currently or formerly owned or operated by any Acquired
Company.

        "GAAP" --generally accepted United States accounting principles, applied
on a basis consistent with the basis on which the Balance Sheet and the other
financial statements referred to in Section 3.4 were prepared.

        "GOVERNMENTAL AUTHORIZATION " --any approval, consent, license, permit,
waiver, or other authorization issued, granted, given, or otherwise made
available by or under the authority of any Governmental Body or pursuant to any
Legal Requirement.

        "GOVERNMENTAL BODY" --any:

               (a) nation, state, county, city, town, village, district, or
other jurisdiction of any nature;

               (b) federal, state, local, municipal, foreign, or other
government;

               (c) governmental or quasi-governmental authority of any nature
(including any governmental agency, branch, department, official, or entity and
any court or other tribunal);

               (d) multi-national organization or body; or

               (e) body exercising, or entitled to exercise, any administrative,
executive, judicial, legislative, police, regulatory, or taxing authority or
power of any nature.

<PAGE>   7

        "HSR ACT" --the Hart-Scott-Rodino Antitrust Improvements Act of 1976 or
any successor law, and regulations and rules issued pursuant to that Act or any
successor law.

        "INTELLECTUAL PROPERTY ASSETS" --as defined in Section 3.20.

        "INTERIM BALANCE SHEET" --as defined in Section 3.4.

        "INTERNATIONAL EMPLOYEE PLAN" --each Company Employee Plan that has been
adopted or maintained by each Acquired Company, whether informally or formally,
for the benefit of Employees outside the United States.

        "KEY EXECUTIVES" --Ramin Sadr and Farshad Meshkinpour.

        "KNOWLEDGE" --an individual or Person will be deemed to have "Knowledge"
of a particular fact or other matter if:

               (a) such individual or Person is actually aware of such fact or
other matter; or

               (b) a prudent individual or Person could be expected to discover
or otherwise become aware of such fact or other matter in the ordinary course of
conducting and managing a business enterprise.

        A Person (other than an individual) will be deemed to have "Knowledge"
of a particular fact or other matter if any individual who is serving as a
director, officer, partner, executor, or trustee of such Person (or in any
similar capacity) has, or at any time had, Knowledge of such fact or other
matter.

        "LEGAL REQUIREMENT" --any federal, state, local, municipal, foreign,
international, multinational, or other administrative order, constitution, law,
ordinance, principle of common law, regulation, statute, or treaty.

        "LIABILITY" --any liability (whether known or unknown, whether asserted
or unasserted, whether absolute or contingent, whether accrued or unaccrued,
whether liquidated or unliquidated, and whether due or to become due), including
any liability for Taxes.

        "NAMED CONTRACTS" --the License Agreement dated December 1, 1995 by and
between Parent and AT&T Corp.; the Patent License Agreement dated March 24, 1996
by and between the Company and Nippon Telegraph and Telephone Corporation; the
License Agreement dated June 1, 1996 by and between the Company and France
Telecom; and the License Agreement by and between the Company and Sipro Lab
Telecom, Inc.

        "NET ACQUISITION AMOUNT" -- $23,765,288.

        "NET ASSUMED OPTION AMOUNT" -- $450,296.

        "OPTIONS" --all options or rights to purchase shares of capital stock of
the Company.

<PAGE>   8

        "ORDER" --any award, decision, injunction, judgment, order, ruling,
subpoena, or verdict entered, issued, made, or rendered by any court,
administrative agency, or other Governmental Body or by any arbitrator.

        "ORDINARY COURSE OF BUSINESS" --an action taken by a Person will be
deemed to have been taken in the "Ordinary Course of Business" only if:

               (a) such action is consistent with the past practices of such
Person and is taken in the ordinary course of the operations of such Person; and

               (b) such action is not required to be authorized by the board of
directors of such Person (or by any Person or group of Persons exercising
similar authority) and is not required to be specifically authorized by the
parent company (if any) of such Person.

        "ORGANIZATIONAL DOCUMENTS" --(a) the articles or certificate of
incorporation and the bylaws of a corporation; (b) the partnership agreement and
any statement of partnership of a general partnership; (c) the limited
partnership agreement and the certificate of limited partnership of a limited
partnership; (d) any charter or similar document adopted or filed in connection
with the creation, formation, or organization of a Person; and (e) any amendment
to any of the foregoing.

        "PERSON" --any individual, corporation (including any non-profit
corporation), general or limited partnership, limited liability company, joint
venture, estate, trust, association, organization, labor union, or other entity
or Governmental Body.

        "PROCEEDING" --any action, arbitration, audit, hearing, investigation,
litigation, or suit (whether civil, criminal, administrative, investigative, or
informal) commenced, brought, conducted, or heard by or before, or otherwise
involving, any Governmental Body or arbitrator.

        "RELATED PERSON" --with respect to a particular individual:

               (a) each other member of such individual's Family;

               (b) any Person that is directly or indirectly controlled by such
individual or one or more members of such individual's Family;

               (c) any Person in which such individual or members of such
individual's Family hold (individually or in the aggregate) a Material Interest;
and

               (d) any Person with respect to which such individual or one or
more members of such individual's Family serves as a director, officer, partner,
executor, or trustee (or in a similar capacity).

        With respect to a specified Person other than an individual:

               (a) any Person who beneficially owns, directly or indirectly,
five percent (5%) of the issued and outstanding equity securities or equity
interests in the specified Person;

<PAGE>   9

               (b) any Person who beneficially owns, directly or indirectly,
five percent (5%) of voting securities or other voting interests in the
specified Person;

               (c) any Person who has the right to designate a director in the
specified Person;

               (d) any Person who has the right to appoint the chief executive
officer of the specified Person;

               (e) any entity in which a Related Person owns twenty-five percent
(25%) or more of the issued and outstanding equity securities or equity
interests in such entity;"

               (f) each Person that serves as a director, officer, partner,
executor, or trustee of such specified Person (or in a similar capacity);

               (g) any Person in which such specified Person holds a Material
Interest;

               (h) any Person with respect to which such specified Person serves
as a general partner or a trustee (or in a similar capacity); and

               (i) any Related Person of any individual described in clause (b)
or (c).

        For purposes of this definition, (a) the "Family" of an individual
includes (i) the individual, (ii) the individual's spouse, (iii) any other
natural person who is related to the individual or the individual's spouse
within the second degree, and (iv) any other natural person who resides with
such individual, and (b) "Material Interest" means direct or indirect beneficial
ownership (as defined in Rule 13d-3 under the Securities Exchange Act of 1934
(the "Exchange Act")) of voting securities or other voting interests
representing at least 5% of the outstanding voting power of a Person or equity
securities or other equity interests representing at least 5% of the outstanding
equity securities or equity interests in a Person.

        "RELEASES" --as defined in Section 2.5.

        "REPRESENTATIVE" --with respect to a particular Person, any director,
officer, employee, agent, consultant, advisor, or other representative of such
Person, including legal counsel, accountants, and financial advisors.

        "SECURITIES ACT" --the Securities Act of 1933 or any successor law, and
regulations and rules issued pursuant to that Act or any successor law.

        "SHARES" --the issued and outstanding shares of capital stock of the
Company.

        "SHARE PURCHASE AGREEMENT" --that certain Share Purchase Agreement to be
entered into among Parent, Sadr and Meshkinpour and pursuant to which Parent
shall acquire 100% of the Shares immediately prior to the Closing.

<PAGE>   10

        "SUBSIDIARY" --with respect to any Person (the "Owner"), any corporation
or other Person of which securities or other interests having the power to elect
a majority of that corporation's or other Person's board of directors or similar
governing body, or otherwise having the power to direct the business and
policies of that corporation or other Person (other than securities or other
interests having such power only upon the happening of a contingency that has
not occurred) are held by the Owner or one or more of its Subsidiaries; when
used without reference to a particular Person, "Subsidiary" means a Subsidiary
of the Company.

        "TAX" or "TAXES" --includes any federal, state, local, or foreign
income, gross receipts, license, payroll, employment, excise, severance, stamp,
occupation, premium, windfall profits, environmental (including taxes under Code
ss. 59A), customs duties, capital stock, franchise, profits, withholding, social
security (or similar, including FICA), unemployment, disability, real property,
personal property, sales, use, transfer, registration, value added, alternative
or add-on minimum, estimated, or other tax of any kind whatsoever, including any
interest, penalty, or addition thereto, whether disputed or not.

        "TAX RETURN" --any return (including any information return), report,
statement, schedule, notice, form, or other document or information filed with
or submitted to, or required to be filed with or submitted to, any Governmental
Body in connection with the determination, assessment, collection, or payment of
any Tax or in connection with the administration, implementation, or enforcement
of or compliance with any Legal Requirement relating to any Tax.

        "THREATENED" --a claim, Proceeding, dispute, action, or other matter
will be deemed to have been "Threatened" if any demand or statement has been
made (orally or in writing) or any notice has been given (orally or in writing)
that would lead a prudent Person to conclude that such a claim, Proceeding,
dispute, action, or other matter is likely to be asserted, commenced, taken, or
otherwise pursued in the future.

 . Subject to the terms and conditions of this Agreement, at the Closing, Buyer
will purchase from the Company, and the Company will sell, transfer, convey and
deliver to Buyer, all of the Acquired Assets at the Closing for the
consideration specified below in this Section 2.

 . Subject to the terms and conditions of this Agreement, Buyer agrees to assume
and become responsible for all of the Assumed Liabilities at the Closing. The
Buyer will not assume or have any responsibility whatsoever with respect to any
other obligation or Liability of the Company not included within the definition
of Assumed Liabilities.

 . The aggregate purchase price (the "Purchase Price") for the Shares will be
equal to the Net Acquisition Amount.

 . The purchase and sale (the "Closing") provided for in this Agreement will take
place at the offices of Buyer's counsel at Wilson Sonsini Goodrich & Rosati,
P.C., 650 Page Mill Road, Palo Alto, California, at 10:00 a.m. (local time) on
the later of (i) May 29, 1998 or (ii) the date that is two business days
following the termination of the applicable waiting period under the HSR Act, or
at such other time and place as the parties may agree. Subject to the provisions
of Section 11, failure to 

<PAGE>   11

consummate the purchase and sale provided for in this Agreement on the date and
time and at the place determined pursuant to this Section 2.4 will not result in
the termination of this Agreement and will not relieve any party of any
obligation under this Agreement.

 . At the Closing:

               (a) The Company and Shareholders, as applicable, will deliver to
Buyer:

                   (i) signed and executed bills of sale and instruments of
               assignment conveying the Acquired Assets, in each case in form
               and substance reasonably satisfactory to Buyer and its counsel;
               (ii) releases in the form of Exhibit 2.5(a)(ii) executed by
               Parent and the Key Executives (collectively, the "Releases");

                   (iii) the Consents to the Named Contracts as set forth in
               Section 5.9(a);

                   (iv) a Stock Option Substitution Agreement (the "Substitution
               Agreement") in the form of Exhibit 2.5(a)(iv) executed by each
               holder of an Assumed Option;

                   (v) a Cash-Out Option Agreement (the "Cash-Out Agreement") in
               the form of Exhibit 2.5(a)(v) executed by each holder of a
               Cash-Out Option; and

                   (vi) a certificate executed by the Company and Shareholders
               representing and warranting to Buyer that the conditions set
               forth in Sections 7.1 and 7.2 below have been satisfied.

               (b) Buyer will deliver:

                   (i) to the Company, a wire transfer in the aggregate amount
               of the difference obtained by subtracting the Escrow Amount from
               the Net Acquisition Amount;

                   (ii) a Substitution Agreement with respect to each holder of
               an Assumed Option;

                   (iii) a Cash-Out Option Agreement with respect to each holder
               of a Cash-Out Option; and

                   (iv) to the Company, a certificate executed by Buyer
               representing and warranting that the conditions set forth in
               Sections 8.1 and 8.2 below have been satisfied.

               (c) Buyer, the Company and Shareholders will enter into an escrow
agreement in the form of Exhibit 2.4(c) (the "Escrow Agreement") with a bank
reasonably acceptable to Buyer and Parent (the "Escrow Agent"), and Buyer will
deposit the Escrow Amount with the Escrow Agent.

<PAGE>   12

               (d) Buyer will make bonus payments in the aggregate amount of
$80,000 to the following Employees: Mike Collender, Roland Bevan and Matt
Thompson.

               (e) Parent and Buyer will enter into the Product Supply Agreement
in the form of Exhibit 2.5(e)(i) (the "Product Supply Agreement") and Parent,
Buyer and the Company will enter into Amendment No. 1 to License Agreement in
the form of Exhibit 2.5(e)(ii) (the "License Agreement").

 .

               (a) At the Closing, Buyer and each holder of an Option named on
Schedule A to the Substitution Agreement who is an employee or consultant of the
Company as of the Closing will deliver a Substitution Agreement pursuant to
which each Option held by such holder will be terminated and exchanged for an
option to purchase the number of shares of Buyer Common Stock as is set forth
opposite the name of each such holder on Schedule A to the form of Substitution
Agreement, at an exercise price as is set forth on said Schedule A.

               (b) At the Closing, in full satisfaction of the obligation of the
Company and Buyer pursuant to the Cash-Out Options, Buyer will pay to each
holder of a Cash-Out Option an amount of cash equal to the product of the number
of shares subject to the holder's Cash-Out Option multiplied by a fraction, (x)
the numerator of which is the Cash-Out Option Amount and (y) the denominator of
which is the number of shares of capital stock of the Company subject to all
Cash-Out Options.

 . The Company, Buyer and Parent agree to allocate the Purchase Price for the
Acquired Assets for all tax and accounting purposes in accordance with the
allocation formula set forth on Exhibit 2.7 hereto. The Company and Parent agree
not to file any Tax Return reflecting such allocation during the sixty (60) day
period following the Closing Date.

 . Personal ad valorem property taxes attributable to the Acquired Assets for any
taxable period which includes the Closing Date shall be apportioned at the
Closing on a pro rata basis.

 . The Company and each Shareholder jointly and severally (except for the
representations and warranties contained in Section 3.11 which are being made
solely by the Company and Parent) represent and warrant to Buyer as follows:

 .

               (a) Part 3.1 of the Disclosure Letter contains a complete and
accurate list for each Acquired Company of its name, its jurisdiction of
incorporation, other jurisdictions in which it is authorized to do business, and
its capitalization (including the identity of each stockholder and Option holder
and the number of shares held by each and the number of shares subject to
Options held by each). Each Acquired Company is a corporation duly organized,
validly existing, and in good standing under the laws of its jurisdiction of
incorporation, with full corporate power and authority to conduct its business
as it is now being conducted, to own or use the Acquired Assets and to perform
all its obligations under Applicable Contracts. Each Acquired Company is duly
qualified to do business as a foreign corporation and is in good standing under
the laws of each state or other 

<PAGE>   13

jurisdiction in which either the ownership or use of the properties owned or
used by it, or the nature of the activities conducted by it, requires such
qualification.

               (b) The Company has delivered to Buyer copies of the
Organizational Documents of each Acquired Company, as currently in effect.

 .

               (a) This Agreement constitutes the legal, valid, and binding
obligation of the Company, enforceable against the Company in accordance with
its terms, except as such enforceability may be limited by laws of general
application relating to bankruptcy, insolvency and the relief of debtors and to
rules of law governing equitable remedies. The Company has the absolute and
unrestricted right, power, authority, and capacity to execute and deliver this
Agreement and to perform its obligations under this Agreement.

               (b) Except as set forth in Part 3.2 of the Disclosure Letter,
neither the execution and delivery of this Agreement nor the consummation or
performance of any of the Contemplated Transactions will, directly or indirectly
(with or without notice or lapse of time):

                   (i) contravene, conflict with, or result in a violation of
               (A) any provision of the Organizational Documents of Shareholders
               or the Acquired Companies, or (B) any resolution adopted by the
               board of directors or the stockholders of Parent or any Acquired
               Company;

                   (ii) contravene, conflict with, or result in a violation of,
               or give any Governmental Body or other Person the right to
               challenge any of the Contemplated Transactions or to exercise any
               remedy or obtain any relief under, any Legal Requirement or any
               Order to which any Acquired Company or Shareholders, or any of
               the Acquired Assets, may be subject;

                   (iii) contravene, conflict with, or result in a violation of
               any of the terms or requirements of, or give any Governmental
               Body the right to revoke, withdraw, suspend, cancel, terminate,
               or modify, any Governmental Authorization that is held by any
               Acquired Company or that otherwise relates to the business of, or
               any of the Acquired Assets;

                   (iv) cause any of the Acquired Assets to be reassessed or
               revalued by any taxing authority or other Governmental Body;

                   (v) contravene, conflict with, or result in a violation or
               breach of any provision of, or give any Person the right to
               declare a default or exercise any remedy under, or to accelerate
               the maturity or performance of, or to cancel, terminate, or
               modify, any Applicable Contract; or

                   (vi) result in the imposition or creation of any Encumbrance
               upon or with respect to any of the Acquired Assets.

        Except (i) as set forth in Part 3.2 of the Disclosure Letter and (ii)
for the consents to be obtained by the Company prior to the Closing Date for the
assignment to the Buyer of the Named Contracts pursuant to Sections 5.9(a) and
7.3 hereof, neither any Shareholder nor any Acquired Company is or will be
required to give any notice to or obtain any Consent from any Person in

<PAGE>   14

connection with the execution and delivery of this Agreement or the consummation
or performance of any of the Contemplated Transactions.

 . The authorized equity securities of the Company consist of 5,000,000 shares of
common stock, no par value per share, of which 4,148,574 shares are issued and
outstanding and 600,786 shares of Series A Preferred Stock, no par value per
share, all of which shares are issued and outstanding. Except as set forth in
Part 3.3 of the Disclosure Letter, Parent is and will be on the Closing Date the
record and beneficial owner and holder of all of the Shares, free and clear of
all Encumbrances. With the exception of the Shares and except as set forth in
Part 3.3 of the Disclosure Letter, all of the outstanding equity securities and
other securities of each Acquired Company are owned of record and beneficially
by one or more of the Acquired Companies, free and clear of all Encumbrances,
and legend or other reference to any purported Encumbrance appears upon any
certificate representing equity securities of any Acquired Company. All of the
outstanding equity securities of each Acquired Company have been duly authorized
and validly issued and are fully paid and nonassessable. Except as described in
Part 3.3 of the Disclosure Letter, there are no Options or other Contracts
relating to the issuance, sale, or transfer of any equity securities or other
securities of any Acquired Company. All outstanding Options have an exercise
price of $1.00 per share, which price represented the fair market value of such
Options as of the date on which they were granted. None of the outstanding
equity securities or other securities of any Acquired Company was issued in
violation of the Securities Act or any other Legal Requirement, and all issued
and outstanding securities or other securities of any Acquired Company have been
accounted for in accordance with GAAP. No Acquired Company owns, or has any
Contract to acquire, any equity securities or other securities of any Person or
any direct or indirect equity or ownership interest in any other business.

 . The Company has delivered to Buyer: (a) a consolidated balance sheet of Parent
at December 31, 1997 (including the notes thereto, the "Balance Sheet"), and the
related consolidated statements of income, changes in stockholders' equity, and
cash flow for the fiscal year then ended, together with the report thereon of
KPMG Peat Marwick LLP, independent certified public accountants, and (b) an
unaudited consolidated balance sheet of the Acquired Companies at March 31, 1998
(the "Interim Balance Sheet") and the related unaudited consolidated statements
of income for the three months then ended. Such financial statements and notes
fairly present the financial condition and the results of operations of the
Acquired Companies as of the respective dates of and for the periods referred to
in such financial statements, all in accordance with GAAP, subject, in the case
of interim financial statements, to normal recurring year-end adjustments (the
effect of which will not, individually or in the aggregate, be materially
adverse) and the absence of notes (that, if presented, would not differ
materially from those included in the Balance Sheet with respect to the Acquired
Companies); the financial statements referred to in this Section 3.4 reflect the
consistent application of such accounting principles throughout the periods
involved. No financial statements of any Person other than the Acquired
Companies are required by GAAP to be included in the consolidated financial
statements of the Company.

 . The books of account, minute books, stock record books, and other records of
the Acquired Companies, all of which have been made available to Buyer, are
complete and correct and have been maintained in accordance with sound business
practices, including the maintenance of an adequate system of internal controls.
The minute books of the Acquired Companies contain accurate and complete records
of all meetings held of, and corporate actions taken by, the stockholders, the
Boards of Directors, and committees of the Boards of Directors of the Acquired
Companies, and no 

<PAGE>   15

meeting of any such stockholders, Board of Directors, or committee has been held
for which minutes have not been prepared and are not contained in such minute
books.

 . Part 3.6 of the Disclosure Letter contains a complete and accurate list of all
real property, leaseholds, or other interests therein owned by any Acquired
Company. Except as set forth in Part 3.6 of the Disclosure Letter, the Acquired
Companies own all the properties and assets (whether real, personal, or mixed
and whether tangible or intangible) that they purport to own, located in the
facilities owned or operated by the Acquired Companies or reflected as owned in
the books and records of the Acquired Companies, including all of the properties
and assets reflected in the Balance Sheet (to the extent reflected thereon as
being the Company's assets) and the Interim Balance Sheet (except for assets
held under capitalized leases disclosed or not required to be disclosed in Part
3.6 of the Disclosure Letter and personal property sold since the date of the
Balance Sheet as being owned by an Acquired Company and the Interim Balance
Sheet, as the case may be, in the Ordinary Course of Business), and all of the
properties and assets purchased or otherwise acquired by the Acquired Companies
since the date of the Interim Balance Sheet (except for personal property
acquired and sold since the date of the Interim Balance Sheet in the Ordinary
Course of Business), which were subsequently purchased or acquired properties
and assets (other than inventory and short-term investments) are listed in Part
3.6 of the Disclosure Letter. Except as set forth in Part 3.6 of the Disclosure
Letter, the Acquired Assets reflected in the Balance Sheet (to the extent
reflected thereon as being the Company's assets) and the Interim Balance Sheet
are free and clear of all Encumbrances except, with respect to all such
properties and assets, (a) mortgages or security interests shown on the Balance
Sheet (to the extent reflected thereon as being the Company's assets) or the
Interim Balance Sheet as securing specified liabilities or obligations, with
respect to which no default (or event that, with notice or lapse of time or
both, would constitute a default) exists, (b) mortgages or security interests
incurred in connection with the purchase of property or assets after the date of
the Interim Balance Sheet (such mortgages and security interests being limited
to the property or assets so acquired), with respect to which no default (or
event that, with notice or lapse of time or both, would constitute a default)
exists, (c) liens for current taxes not yet due, (d) easements (including
unrecorded easements), covenants, rights-of-way or other Encumbrances or
restrictions relating to real property and (e) zoning, building or other real
property use restrictions, none of which items set forth in clauses (a) through
(e) above, individually or in the aggregate, materially impair the continued
use, value and operation of the Acquired Assets used in the businesses of the
Acquired Companies, as presently conducted or proposed to be conducted.

 . Except as set forth in Part 3.7 in the Disclosure Letter, the Acquired Assets
comprise all of the assets, properties and rights of every type and description,
real, personal, tangible and intangible used by the Acquired Companies in the
conduct of their businesses and are sufficient for the continued conduct of the
Acquired Companies' businesses after the Closing in substantially the same
manner as conducted prior to the Closing.

 . All accounts receivable from and after the date of the Interim Balance Sheet
as reflected on the accounting records of the Acquired Companies as of the
Closing Date (collectively, the "Accounts Receivable") represent or will
represent valid obligations arising from sales actually made or services
actually performed in the Ordinary Course of Business. Unless paid prior to the
Closing Date, the Accounts Receivable are or will be as of the Closing Date
collectible net of the respective reserves shown on the Interim Balance Sheet or
on the accounting records of the Acquired Companies as of the Closing Date
(which reserves are adequate and calculated consistent with past 

<PAGE>   16

practice and, in the case of the reserve as of the Closing Date, will not
represent a materially greater percentage of the Accounts Receivable as of the
Closing Date than the reserve reflected in the Interim Balance Sheet represented
of the Accounts Receivable reflected therein and will not represent a material
adverse change in the composition of such Accounts Receivable in terms of
aging). Subject to such reserves, each of the Accounts Receivable is or will be
collectible without any set-off. There is no contest, claim, or right of
set-off, other than returns in the Ordinary Course of Business, under any
Contract with any obligor of an Accounts Receivable relating to the amount or
validity of such Accounts Receivable. Part 3.8 of the Disclosure Letter contains
a complete and accurate list of all Accounts Receivable as of the date of the
Interim Balance Sheet, which list sets forth the aging of such Accounts
Receivable.

 . All inventory of the Acquired Companies, whether or not reflected in the
Balance Sheet or the Interim Balance Sheet, consists of a quality and quantity
usable and salable in the Ordinary Course of Business, except for obsolete items
and items of below-standard quality, all of which have been written off or
written down to net realizable value in the Balance Sheet or the Interim Balance
Sheet or on the accounting records of the Acquired Companies as of the Closing
Date, as the case may be. All inventories not written off have been priced at
the lower of cost or market on a first in, first out basis. The quantities of
each item of inventory (whether raw materials, work-in-process, or finished
goods) are not excessive, but are reasonable in the present circumstances of the
Acquired Companies.

 . Except as set forth in Part 3.10 of the Disclosure Letter, the Acquired
Companies have no liabilities or obligations of any nature (whether known or
unknown and whether absolute, accrued, contingent, or otherwise) except for (a)
Liabilities or obligations reflected or reserved against in the Balance Sheet or
the Interim Balance Sheet, (b) current liabilities incurred in the Ordinary
Course of Business since the respective dates thereof and (c) Liabilities not
expressly assumed pursuant to Section 2.2.

 . To the extent the failure to do so would adversely affect the Company's and
Shareholders' ability to deliver free and clear title to the Acquired Assets or
Buyer's right to hold, own or use the Acquired Assets, Parent has filed within
the time period for filing or any extension granted with respect thereto all
federal, state, local, foreign and other returns, estimates and reports
("Returns") which it is required to file relating or pertaining to any and all
Taxes attributable to, levied or imposed upon, or incurred in connection with
the Acquired Assets or the Employees and each portion of any Tax Return
pertaining or related to the Acquired Assets or the Employees is true and
correct and has been completed in accordance with applicable law. Parent has
paid all Taxes relating to all the Acquired Assets and has withheld with respect
to its employees and paid to the appropriate taxing authority all federal, state
and local income taxes, FICA, FUTA and any other Taxes required to be withheld
with respect to the Acquired Assets or the Employees. There are (and immediately
following the Closing there will be) no Liens on the Acquired Assets relating to
or attributable to Taxes.

 . Since the date of the Balance Sheet, no event has occurred and no circumstance
exists (including any transaction occurring between Company and any Shareholder)
that has resulted in any material adverse change in the business, operations,
properties, prospects, assets, or condition of any Acquired Company, and to
Shareholders' and the Company's Knowledge, no event has occurred or, except as
set forth in Part 3.12 of the Disclosure Letter, circumstance exists (including
any 

<PAGE>   17

transaction occurring between the Company and any Shareholder) that is
reasonably likely to result in such a material adverse change.

 .

               (a) Definitions. With the exception of the definition of
"Affiliate" set forth in Section 3.13(a)(i) below (which definition shall apply
only to this Section 3.13), for purposes of this Agreement, the following terms
shall have the meanings set forth below:

                   (i) "AFFILIATE" shall mean any other person or entity under
               common control with any Acquired Company within the meaning of
               Section 414(b), (c), (m) or (o) of the Code and the regulations
               issued thereunder;

                   (ii) "COMPANY EMPLOYEE PLAN" shall mean any plan, program,
               policy, practice, contract, agreement or other arrangement
               providing for compensation, severance, termination pay,
               performance awards, stock or stock-related awards, fringe
               benefits or other employee benefits or remuneration of any kind,
               whether written or unwritten or otherwise, funded or unfunded,
               including without limitation, each "employee benefit plan,"
               within the meaning of Section 3(3) of ERISA which is or has been
               maintained, contributed to, or required to be contributed to, by
               any Acquired Company or any Affiliate for the benefit of any
               Employee;

                   (iii) "COBRA" shall mean the Consolidated Omnibus Budget
               Reconciliation Act of 1985, as amended;

                   (iv) "DOL" shall mean the United States Department of Labor;

                   (v) "EMPLOYEE" shall mean any current, former, or retired
               employee, officer, or director of any Acquired Company or any
               Affiliate;

                   (vi) "EMPLOYEE AGREEMENT" shall mean each management,
               employment, severance, consulting, relocation, repatriation,
               expatriation, visas, work permit or similar agreement or contract
               between any Acquired Company or any Affiliate and any Employee or
               consultant;

                   (vii) "ERISA" shall mean the Employee Retirement Income
               Security Act of 1974, as amended;

                   (viii) "FMLA" shall mean the Family Medical Leave Act of
               1993, as amended;

                   (ix) "INTERNATIONAL EMPLOYEE PLAN" shall mean each Acquired
               Company Employee Plan that has been adopted or maintained by the
               Company, whether informally or formally, for the benefit of
               Employees outside the United States;

                   (x) "IRS" shall mean the Internal Revenue Service;

<PAGE>   18

                   (xi) "MULTIEMPLOYER PLAN" shall mean any "Pension Plan" (as
               defined below) which is a "multiemployer plan," as defined in
               Section 3(37) of ERISA;

                   (xii) "PBGC" shall mean the Pension Benefit Guaranty
               Corporation; and 

                   (xiii) "PENSION PLAN" shall mean each Company Employee Plan
               which is an "employee pension benefit plan," within the meaning
               of Section 3(2) of ERISA.

               (b) Schedule. Part 3.13(b) of the Disclosure Letter contains an
accurate and complete list of each Company Employee Plan and each material
Employee Agreement. The Company does not have any plan or commitment to
establish any new Company Employee Plan, to modify any Company Employee Plan or
Employee Agree-ment (except to the extent required by law or to conform any such
Company Employee Plan or Employee Agreement to the requirements of any
applicable law, in each case as previously disclosed to Buyer in writing, or as
required by this Agreement), or to enter into any Company Employee Plan or
material Employee Agreement, nor does it have any intention or commitment to do
any of the foregoing.

               (c) Documents. The Company has provided or made available to
Buyer: (i) correct and complete copies of all documents embodying to each
Company Employee Plan and each Employee Agreement including all amendments
thereto and written interpretations thereof; (ii) the most recent annual
actuarial valuations, if any, prepared for each Company Employee Plan; (iii) the
three (3) most recent annual reports (Form Series 5500 and all schedules and
financial statements attached thereto), if any, required under ERISA or the Code
in connection with each Company Employee Plan or related trust; (iv) if the
Company Employee Plan is funded, the most recent annual and periodic accounting
of Company Employee Plan assets; (v) the most recent summary plan description
together with the summary of material modifications thereto, if any, required
under ERISA with respect to each Company Employee Plan; (vi) all IRS
determination, opinion, notification and advisory letters, and rulings relating
to Company Employee Plans and copies of all applications and correspondence to
or from the IRS or the DOL with respect to any Com-pany Employee Plan; (vii) all
material written agreements and contracts relating to each Company Employee
Plan, including, but not limited to, administrative service agreements, group
annuity contracts and group insurance contracts; (viii) all communications
material to any Employee or Employees relating to any Company Employee Plan and
any proposed Company Employee Plans, in each case, relating to any amendments,
terminations, establishments, increases or decreases in benefits, acceleration
of payments or vesting schedules or other events which would result in any
material liability to Company; (ix) representative forms used for COBRA notices;
and (x) all registration statements and prospectuses prepared in connection with
each Company Employee Plan.

               (d) Employee Plan Compliance. Except as set forth in Part 3.13(d)
of the Disclosure Letter, (i) each Acquired Company has performed all
obligations required to be performed by it under, is not in default or violation
of, and has no knowledge of any default or violation by any other party to each
Company Employee Plan, and each Company Employee Plan has been established and
maintained in all material respects in accordance with its terms and in
compliance with all applicable laws, sta-tutes, orders, rules and regulations,
including but not limited to ERISA or the Code; (ii) each Company Employee Plan
intended to qualify under Section 401(a) of the Code and each trust intended to
qualify under Section 501(a) of the Code has either received a favorable
determination letter from the IRS with respect to each such Plan as to its
qualified status 

<PAGE>   19

under the Code, including all amendments to the Code effected by the Tax Reform
Act of 1986 and subsequent legislation, or has remaining a period of time under
applicable U.S. Treasury regulations or IRS pronouncements in which to apply for
such a determination letter and make any amendments necessary to obtain a
favorable determination; (iii) no "prohibited transaction," within the meaning
of Section 4975 of the Code or Sections 406 and 407 of ERISA, and not otherwise
exempt under Section 408 of ERISA, has occurred with respect to any Company
Employee Plan; (iv) there are no Proceedings pending, or, to the Knowledge of
Shareholders or any of the Acquired Companies, threatened or reasonably
anticipated (other than routine claims for benefits) against any Company
Employee Plan or against the assets of any Company Employee Plan; (v) each
Company Employee Plan can be amended, terminated or otherwise discontinued after
the Closing in accordance with its terms, without liability to Buyer, the
Company or any of its Affiliates (other than ordinary administration expenses
typically incurred in a termination event); (vi) there are no audits, inquiries
or Proceedings pending or, to the Knowledge of Shareholders or any of the
Acquired Companies, Threatened by the IRS or DOL with respect to any Company
Employee Plan; and (vii) neither Company nor any Affiliate is subject to any
penalty or tax with respect to any Company Employee Plan under Section 402(i) of
ERISA or Sections 4975 through 4980 of the Code.

               (e) Pension Plans. Each Acquired Company does not now, nor has it
ever, maintained, established, sponsored, participated in, or contributed to,
any Pension Plan which is subject to Title IV of ERISA or Section 412 of the
Code.

               (f) Multiemployer Plans. At no time has any Acquired Company
contributed to or been requested to contribute to any Multiemployer Plan.

               (g) No Post-Employment Obligations. No Company Employee Plan
provides, or has any liability to provide, retiree life insurance, retiree
health or other retiree employee welfare benefits to any person for any reason,
except as may be required by COBRA or other applicable statute, and none of the
Acquired Companies has ever represented, promised or contracted (whether in oral
or written form) to any Employee (either individually or to Employees as a
group) or any other person that such Employee(s) or other person would be
provided with retiree life insurance, retiree health or other retiree employee
welfare benefit, except to the extent required by statute.

               (h) No Acquired Company nor any Affiliate has, prior to the
Closing, and in any material respect, violated any of the health care
continuation requirements of COBRA, the requirements of FMLA or any similar
provisions of state law applicable to its Employees.

               (i) Effect of Transaction

                   (i) Except as set forth in Part 3.13(i) of the Disclosure
               Letter, the execution of this Agreement and the consummation of
               the transactions contem-plated hereby will not (either alone or
               upon the occurrence of any additional or subsequent events)
               constitute an event under any Company Employee Plan, Employee
               Agreement, trust or loan that will or may result in any payment
               (whether of severance pay or other-wise), acceleration,
               forgiveness of indebtedness, vesting, distri-bution, increase in
               benefits or obligation to fund benefits with respect to any
               Employee.

<PAGE>   20

                   (ii) No payment or benefit which will or may be made by any
               Acquired Company or its Affiliates with respect to any Employee
               as a result of the transactions contemplated by this Agreement
               will be characterized as an "excess parachute payment," within
               the meaning of Section 280G(b)(1) of the Code.

               (j) Employment Matters. Except as set forth in Part 3.13(j) of
the Disclosure Letter, each Acquired Company: (i) is in compli-ance with all
applicable foreign, federal, state and local laws, rules and regulations
respecting employment, employment practices, terms and conditions of employment
and wages and hours, in each case, with respect to Employees; (ii) has withheld
all amounts required by law or by agreement to be withheld from the wages,
salaries and other payments to Employees; (iii) is not liable for any arrears of
wages or any taxes or any penalty for failure to comply with any of the
foregoing; and (iv) is not liable for any material payment to any trust or other
fund or to any governmental or administrative authority, with respect to
unemployment compensation benefits, social security or other benefits or
obligations for Employees (other than routine payments to be made in the normal
course of business and consistent with past practice). There are no pending, or,
to the Knowledge of Shareholders and the Acquired Companies, Threatened or
reasonably anticipated claims or actions against any Acquired Company of
discrimination or harassment, under any worker's compensation policy or
long-term disability policy or otherwise. To the Knowledge of Shareholders or
any of the Acquired Companies, no Employee has violated any employment contract,
nondisclosure agreement or noncompetition agreement by which such employee is
bound due to such employee being employed by an Acquired Company and disclosing
to the Acquired Company or using trade secrets or proprietary information of any
other person or entity.

               (k) Labor. No work stoppage or labor strike against any Acquired
Company is pending, or, to the Knowledge of Shareholders and the Acquired
Companies, Threatened or reasonably anticipated. Company does not know of any
activities or proceedings of any labor union to organize any Employees. There
are no actions, suits, claims, labor disputes or grievances pending, or, to the
Knowledge of Shareholders and the Acquired Companies, Threatened or reasonably
anticipated relating to any labor, safety or discrimination matters involving
any Employee, including, without limitation, charges of unfair labor practices
or discrimination complaints, which, if adversely determined, would,
individually or in the aggregate, result in any material liability to any
Acquired Company. Neither the Company nor any of its subsidiaries has engaged in
any unfair labor practices within the meaning of the National Labor Relations
Act. No Acquired Company is presently, nor has it been in the past, a party to,
or bound by, any collective bargaining agree-ment or union contract with respect
to Employees and no collective bargaining agreement is being negotiated by any
Acquired Company.

               (l) International Employee Plan. Each International Employee Plan
has been established, maintained and administered in material compliance with
its terms and conditions and with the requirements prescribed by any and all
statutory or regulatory laws that are applicable to such International Employee
Plan. Furthermore, no International Employee Plan has unfunded liabilities, that
as of the Closing, will not be offset by insurance or fully accrued. Except as
required by law, no condition exists that would prevent any Acquired Company or
Buyer from terminating or amending any International Employee Plan at any time
for any reason.

<PAGE>   21

 .

               (a) Except as set forth in Part 3.14 of the Disclosure Letter:

                   (i) each Acquired Company is, and at all times since its
               inception has been, in full compliance with each Legal
               Requirement that is or was applicable to it or to the conduct or
               operation of its business or the ownership or use of any of the
               Acquired Assets;

                   (ii) to the Knowledge of Shareholders and the Acquired
               Companies, no event has occurred or circumstance exists that
               (with or without notice or lapse of time) (A) is reasonably
               likely to constitute or result in a violation by any Acquired
               Company of, or a failure on the part of any Acquired Company to
               comply with, any Legal Requirement, or (B) is reasonably likely
               to give rise to any obligation on the part of any Acquired
               Company to undertake, or to bear all or any portion of the cost
               of, any remedial action of any nature; and

                   (iii) no Acquired Company has received, at any time since its
               inception, any notice or other communication (whether written or,
               to the Knowledge of Shareholders and the Acquired Companies,
               oral) from any Governmental Body or any other Person regarding
               (A) any actual, alleged, possible, or potential violation of, or
               failure to comply with, any Legal Requirement, or (B) any actual
               or alleged obligation on the part of any Acquired Company to
               undertake, or to bear all or any portion of the cost of, any
               remedial action of any nature.

               (b) Part 3.14 of the Disclosure Letter contains a complete and
accurate list of each Governmental Authorization that is held by any Acquired
Company or that otherwise relates to the business of, or to any of the Acquired
Assets. Each Governmental Authorization listed or required to be listed in Part
3.14 of the Disclosure Letter is valid and in full force and effect. Except as
set forth in Part 3.14 of the Disclosure Letter:

                   (i) each Acquired Company is, and at all times since
               inception has been, in full compliance with all of the terms and
               requirements of each Governmental Authorization identified or
               required to be identified in Part 3.14 of the Disclosure Letter;

                   (ii) to the Knowledge of Shareholders and the Acquired
               Companies, no event has occurred or circumstance exists that is
               reasonably likely to (with or without notice or lapse of time)
               (A) constitute or result directly or indirectly in a violation of
               or a failure to comply with any term or requirement of any
               Governmental Authorization listed or required to be listed in
               Part 3.14 of the Disclosure Letter, or (B) result directly or
               indirectly in the revocation, withdrawal, suspension,
               cancellation, or termination of, or any modification to, any
               Governmental Authorization listed or required to be listed in
               Part 3.14 of the Disclosure Letter;

                   (iii) no Acquired Company has received, at any time since
               inception, any notice or other communication (whether written or,
               to the Knowledge of Shareholders and the Acquired Companies,
               oral) from any Governmental Body or any other Person regarding
               (A) any actual, alleged, possible, or potential violation of, or
               failure to comply with, any term or requirement of any
               Governmental Authorization, or (B) any actual or proposed
               revocation, withdrawal, suspension, cancellation, termination of,
               or modification to any Governmental Authorization; and

<PAGE>   22

                   (iv) all applications required to have been filed for the
               renewal of the Governmental Authorizations listed or required to
               be listed in Part 3.14 of the Disclosure Letter have been duly
               filed on a timely basis with the appropriate Governmental Bodies,
               and all other filings required to have been made with respect to
               such Governmental Authorizations have been duly made on a timely
               basis with the appropriate Governmental Bodies.

        The Governmental Authorizations listed in Part 3.14 of the Disclosure
Letter collectively constitute all of the Governmental Authorizations necessary
to permit the Acquired Companies to lawfully conduct and operate their
businesses in the manner they currently conduct and operate such businesses and
to permit the Acquired Companies to own and use the Acquired Assets in the
manner in which they currently own and use such Acquired Assets. .

               (a) Except as set forth in Part 3.15 of the Disclosure Letter,
there is no pending Proceeding:

                   (i) that has been commenced by or against any Acquired
               Company or, to the Knowledge of Shareholders and the Acquired
               Companies, that otherwise relates to the business of, or any of
               the Acquired Assets; or

                   (ii) to the Knowledge of Shareholders and the Acquired
               Companies, that challenges, or that may have the effect of
               preventing, delaying, making illegal, or otherwise interfering
               with, any of the Contemplated Transactions.

        To the Knowledge of Shareholders and the Acquired Companies, (1) no such
Proceeding has been Threatened, and (2) no event has occurred or circumstance
exists that may give rise to or serve as a basis for the commencement of any
such Proceeding. The Company has delivered to Buyer copies of all pleadings,
correspondence, and other documents relating to each Proceeding listed in Part
3.15 of the Disclosure Letter.

               (b) Except as set forth in Part 3.15 of the Disclosure Letter:

                   (i) there is no Order to which any of the Acquired Companies,
               or any of the assets owned or used by any Acquired Company, is
               subject;

                   (ii) no Shareholder is subject to any Order that relates to
               the business of, or any of the Acquired Assets; and

                   (iii) to the Knowledge of Shareholders and the Acquired
               Companies, no officer, director, agent, or employee of any
               Acquired Company is subject to any Order that prohibits such
               officer, director, agent, or employee from engaging in or
               continuing any conduct, activity, or practice relating to the
               business of any Acquired Company.

<PAGE>   23

               (c) Except as set forth in Part 3.15 of the Disclosure Letter:

                   (i) each Acquired Company is, and at all times since
               inception has been, in full compliance with all of the terms and
               requirements of each Order to which it, or any of the Acquired
               Assets, is or has been subject;

                   (ii) to the Knowledge of Shareholders and the Acquired
               Companies, no event has occurred or circumstance exists that may
               constitute or result in (with or without notice or lapse of time)
               a violation of or failure to comply with any term or requirement
               of any Order to which any Acquired Company, or any of the
               Acquired Assets, is subject; and

                   (iii) to the Knowledge of Shareholders and the Acquired
               Companies, no Acquired Company has received, at any time since
               inception, any notice or other communication (whether oral or
               written) from any Governmental Body or any other Person regarding
               any actual, alleged, possible, or potential violation of, or
               failure to comply with, any term or requirement of any Order to
               which any Acquired Company, or any of the Acquired Assets, is or
               has been subject.

 . Except as set forth in Part 3.16 of the Disclosure Letter, since the date of
the Interim Balance Sheet, the Acquired Companies have conducted their
businesses only in the Ordinary Course of Business and there has not been any:

               (a) change in any Acquired Company's authorized or issued capital
stock; grant of any stock option or right to purchase shares of capital stock of
any Acquired Company; issuance of any security convertible into such capital
stock; grant of any registration rights; purchase, redemption, retirement, or
other acquisition by any Acquired Company of any shares of any such capital
stock; or declaration or payment of any dividend or other distribution or
payment in respect of shares of capital stock;

               (b) amendment to the Organizational Documents of any Acquired
Company;

               (c) payment or increase by any Acquired Company of any bonuses,
salaries, or other compensation to any stockholder, director, officer, or
(except in the Ordinary Course of Business) employee or entry into any
employment, severance, or similar Contract with any director, officer, or
employee or prospective employee;

               (d) adoption of, or increase in the payments to or benefits
under, modification or termination of any profit sharing, bonus, deferred
compensation, savings, insurance, pension, retirement, or other employee benefit
plan for or with any employees of any Acquired Company;

               (e) damage to or destruction or loss of any asset or property of
any Acquired Company, whether or not covered by insurance, materially and
adversely affecting the properties, assets, business, financial condition, or
prospects of the Acquired Companies, taken as a whole;

               (f) entry into, termination of, or receipt of notice of
termination of (i) any license, distributorship, dealer, sales representative,
joint venture, credit, or similar agreement, or 

<PAGE>   24

(ii) any Contract or transaction involving a total remaining commitment by or to
any Acquired Company of at least $10,000;

               (g) sale (other than sales of inventory in the Ordinary Course of
Business), lease, assignment, or other disposition of any asset or property
(tangible or intangible) of any Acquired Company or mortgage, pledge, or
imposition of any lien or other Encumbrance on any material asset or property
(tangible or intangible) of any Acquired Company, including the sale, lease, or
other disposition of any of the Intellectual Property Assets;

               (h) cancellation, compromise, waiver or release of any claims or
rights with a value to any Acquired Company in excess of $10,000;

               (i) capital expenditure (or series of related capital
expenditures) involving more than $10,000 singly or $20,000 in the aggregate;

               (j) capital investment in, loan to, or acquisition of the
securities or assets of, any other Person (or series of related capital
investments, loans, and acquisitions) relating to the Acquired Assets;

               (k) issuance of any note, bond, or other debt security or other
creation, incurrence, assumption or guarantee of any indebtedness for borrowed
money or capitalized lease obligation;

               (l) delay or postponement of the payment of accounts payable and
other Liabilities outside the Ordinary Course of business;

               (m) material change in the accounting methods used by any
Acquired Company;

               (n) grant of any license or sublicense of any rights by any
Acquired Company under or with respect to any Intellectual Property;

               (o) pledge by any Acquired Company to make any charitable or
other capital contribution outside the Ordinary Course of Business;

               (p) occurrence, event, incident, action, failure to act, or
transaction outside the Ordinary Course of Business involving any of the
Acquired Companies; or

               (q) agreement, whether oral or written, by any Acquired Company
to do any of the foregoing.

<PAGE>   25

 .

               (a) Part 3.17(a) of the Disclosure Letter contains a complete and
accurate list, and the Company has delivered to Buyer true and complete copies,
of:

                   (i) each Applicable Contract that involves performance of
               services or delivery of goods or materials by one or more
               Acquired Companies of an amount or value in excess of $50,000;

                   (ii) each Applicable Contract that involves performance of
               services or delivery of goods or materials to one or more
               Acquired Companies of an amount or value in excess of $50,000;

                   (iii) each Applicable Contract that was not entered into in
               the Ordinary Course of Business and that involves expenditures or
               receipts of one or more Acquired Companies in excess of $50,000;

                   (iv) each lease, rental or occupancy agreement, license,
               installment and conditional sale agreement, and other Applicable
               Contract affecting the ownership of, leasing of, title to, use
               of, or any leasehold or other interest in, any real or personal
               property (except personal property leases and installment and
               conditional sales agreements having a value per item or aggregate
               payments of less than $50,000 and with terms of less than one
               year);

                   (v) each licensing agreement or other Applicable Contract
               with respect to patents, trademarks, copyrights, or other
               intellectual property, including agreements with current or
               former employees, consultants, or contractors regarding the
               appropriation or the non-disclosure of any of the Intellectual
               Property Assets;

                   (vi) each collective bargaining agreement and other
               Applicable Contract to or with any labor union or other employee
               representative of a group of employees;

                   (vii) each joint venture, partnership, and other Applicable
               Contract (however named) involving a sharing of profits, losses,
               costs, or liabilities by any Acquired Company with any other
               Person;

                   (viii) each Applicable Contract containing covenants that in
               any way purport to restrict the business activity of any Acquired
               Company or any Affiliate of an Acquired Company or limit the
               freedom of any Acquired Company or any Affiliate of an Acquired
               Company to engage in any line of business or to compete with any
               Person;

                   (ix) each Applicable Contract providing for payments to or by
               any Person based on sales, purchases, or profits, other than
               direct payments for goods;

                   (x) each power of attorney granted by an Acquired Company, or
               by any officer or director of an Acquired Company, that is
               currently effective and outstanding;

                   (xi) each Applicable Contract entered into other than in the
               Ordinary Course of Business that contains or provides for an
               express undertaking by any Acquired Company to be responsible for
               consequential damages;

                   (xii) each Applicable Contract for capital expenditures in
               excess of $50,000;

<PAGE>   26

                   (xiii) each written warranty, guaranty, and or other similar
               undertaking with respect to contractual performance extended by
               any Acquired Company other than in the Ordinary Course of
               Business; and

                   (xiv) each amendment, supplement, and modification (whether
               oral or written) in respect of any of the foregoing.

               (b) Except as set forth in Part 3.17(b) of the Disclosure Letter,
no Shareholder (and no Related Person of any Shareholder) possesses or may
acquire any right under, or has or may become subject to any obligation or
liability under, any Contract that relates to the business of, or any of the
assets owned or used by, any Acquired Company.

               (c) Except as set forth in Part 3.17(c) of the Disclosure Letter,
each Applicable Contract identified or required to be identified in Part 3.17(a)
of the Disclosure Letter is in full force and effect and is valid and
enforceable in accordance with its terms, except as enforceability may be
limited by laws of general application relating to bankruptcy, insolvency and
the relief of debtors and to rules of law governing equitable remedies.

               (d) Except as set forth in Part 3.17(d) of the Disclosure Letter:

                   (i) each Acquired Company is, and at all times since its
               inception has been, in compliance with all applicable terms and
               requirements of each Applicable Contract under which such
               Acquired Company has or had any obligation or liability or by
               which such Acquired Company or any of the Acquired Assets is or
               was bound;

                   (ii) to the Knowledge of Shareholders and the Acquired
               Companies, each other Person that has or had any obligation or
               liability under any Applicable Contract under which an Acquired
               Company has or had any rights is, and at all times since its
               inception has been, in compliance with all applicable terms and
               requirements of such Applicable Contract;

                   (iii) to the Knowledge of Shareholders and the Acquired
               Companies, no event has occurred or circumstance exists that
               (with or without notice or lapse of time) is reasonably likely to
               contravene, conflict with, or result in a violation or breach of,
               or give any Acquired Company or other Person the right to declare
               a default or exercise any remedy under, or to accelerate the
               maturity or performance of, or to cancel, terminate, or modify,
               any Applicable Contract; and

                   (iv) no Acquired Company has given to or received from any
               other Person, at any time since inception, any notice or other
               communication (whether oral or written) regarding any actual,
               alleged, possible, or potential violation or breach of, or
               default under, any Applicable Contract.

               (e) Except as disclosed in Part 3.17(e) of the Disclosure Letter,
there are no renegotiations of, attempts to renegotiate, or outstanding rights
to renegotiate any material amounts paid or payable to any Acquired Company
under current or completed Applicable Contracts 

<PAGE>   27

with any Person and no such Person has made written demand to Shareholders or
any Acquired Company for such renegotiation.

 .

               (a) The Company has delivered or made available to Buyer:

                   (i) true and complete copies of all policies of insurance to
               which any Acquired Company is a party or under which any Acquired
               Company, or any director of any Acquired Company, with respect to
               his or her capacity as a director, is or has been covered at any
               time within the two years preceding the date of this Agreement;
               and

                   (ii) true and complete copies of all pending applications for
               policies of insurance.

               (b) Part 3.18(b) of the Disclosure Letter describes:

                   (i) any self-insurance arrangement by or affecting any
               Acquired Company, including any reserves established thereunder;
               and

                   (ii) all obligations of the Acquired Companies to third
               parties with respect to insurance (including such obligations
               under leases and service agreements) and identifies the policy
               under which such coverage is provided.

               (c) Part 3.18(c) of the Disclosure Letter sets forth, by year,
for the current policy year and each of the two preceding policy years, with
respect to the Company only:

                   (i) a summary of the loss experience under each policy;

                   (ii) a statement describing each claim under an insurance
               policy for an amount in excess of $10,000, which sets forth:

                         (A) the name of the claimant;

                         (B) a description of the policy by insurer, type of
                   insurance, and period of coverage; and

                         (C) the amount and a brief description of the claim; 
                   and

                   (iii) a statement describing the loss experience for all
               claims that were self-insured, including the number and aggregate
               cost of such claims.

<PAGE>   28

               (d) Except as set forth on Part 3.18(d) of the Disclosure Letter:

                   (i) All policies to which any Acquired Company is a party or
               that provide coverage to any Acquired Company, or any director or
               officer of an Acquired Company:

                         (A) to the Knowledge of Shareholders and the Acquired
                   Companies are valid, outstanding, and enforceable;

                         (B) are sufficient for compliance with all Legal
                   Requirements and Contracts to which any Acquired Company is a
                   party or by which any of them is bound;

                         (C) will continue in full force and effect following
                   the consummation of the Contemplated Transactions; and

                         (D) do not provide for any retrospective premium
                   adjustment or other experienced-based liability on the part
                   of any Acquired Company.

                   (ii) No Shareholder and no Acquired Company has received (A)
               any refusal of coverage or any notice that a defense will be
               afforded with reservation of rights, or (B) any notice of
               cancellation or any other indication that any insurance policy is
               no longer in full force or effect or will not be renewed or that
               the issuer of any policy is not willing or able to perform its
               obligations thereunder.

                   (iii) The Acquired Companies have paid all premiums due, and
               have otherwise performed all of their respective obligations,
               under each policy to which any Acquired Company is a party or
               that provides coverage to any Acquired Company or director
               thereof.

                   (iv) The Acquired Companies have given notice to the insurer
               of all claims that may be insured thereby.

 . Except as set forth in part 3.19 of the Disclosure Letter:

               (a) There are no claims, actions, suits, permit revocations,
requests for information, investigations, orders or other proceedings asserted
by third parties or governmental agencies ("Claim") involving the Acquired
Companies which arise under any U.S. or foreign laws, rules, regulations,
ordinances or policies relating to the protection of the environment or human
health, safety and welfare or reproductive capacity ("Environmental Laws").
Neither the Acquired Companies nor Shareholders have received any notice of any
pending Claim against the Acquired Companies relating to violations of
Environmental Laws by the Acquired Companies. Neither the Acquired Companies nor
Shareholders have any Knowledge of any fact or circumstance that it is
reasonably foreseeable that would give rise to a Claim, or any intent to
commence any other or additional investigations or proceedings against the
Acquired Companies regarding violations or alleged violations of Environmental
Laws.

               (b) The Acquired Companies have not transported, used, stored,
manufactured, released, disposed of or exposed employees who have worked at the
Acquired Companies to any material which is regulated by any governmental
authority because it is toxic, radioactive or otherwise a danger to health and
the environment in violation of any Environmental Laws.

<PAGE>   29

               (c) There are and have been no citations or decisions by any
Governmental Body that any product manufactured, marketed or distributed at any
time by the Acquired Companies ("Product") is defective or fails to meet any
standards promulgated by any such governmental or regulatory body. Neither the
Acquired Companies nor Shareholders have Knowledge of any proceeding now pending
or Threatened which may result in such citation or decision. There are no
existing or Threatened claims against the Acquired Companies for services or
merchandise which are defective or fail to meet any service or product
warranties or any defects or problems which, if discovered by a third party,
would support such a claim. No claim has been asserted against the Acquired
Companies for renegotiation or price redetermination of any business
transaction, and other than concessions in the Ordinary Course of Business, to
the Knowledge of Shareholders and the Acquired Companies, there are no facts
upon which any such claim could be based. To the Knowledge of Shareholders and
the Acquired Company, there is no fact relating to any Product that may impose
upon the Acquired Companies a duty to warn customers of a defect in any Product,
or latent or overt defect in any Product which has been or is being distributed
by the Acquired Companies, which is likely to result in claims for breach of
warranty with respect to such Products in excess of the warranty reserve
reflected in the Financial Statements or to be reflected in the Balance Sheet.
For purposes of the foregoing, with respect to a software product, a "defect"
shall include, without limitation, any characteristic of the product which may,
when the product is used with the computer and operating system with which the
product is used, result in material undesired errors in processing or output,
cessation of system function, or loss of or damage to data, whether during the
operation of the product or during the operation of another program as a result
of effects caused by the product.

 .

               (a) Intellectual Property Assets--The term "Intellectual Property
Assets" includes:

                   (i) the name Telecom Multimedia Systems, Inc., all fictional
               business names, trading names, registered and unregistered
               trademarks, service marks, and applications in which the Acquired
               Companies have an ownership interest or that are being used by
               the Acquired Companies in connection with their business as
               currently conducted (collectively, "Marks");

                   (ii) all patents, patent applications, and inventions and
               discoveries that may be patentable in which the Acquired
               Companies have an ownership interest or that are being used by
               the Acquired Companies in connection with their business as
               currently conducted (collectively, "Patents");

                   (iii) all copyrights in both published works and unpublished
               works in which the Acquired Companies have an ownership interest
               or that are being used by the Acquired Companies in connection
               with their business as currently conducted (collectively,
               "Copyrights");

<PAGE>   30

                   (iv) all rights in mask works in which the Acquired Companies
               have an ownership interest or that are being used by the Acquired
               Companies in connection with their business as currently
               conducted (collectively, "Rights in Mask Works"); and

                   (v) all know-how, trade secrets, confidential information,
               customer lists, software, technical information, data, process
               technology, plans, drawings, and blue prints (collectively,
               "Trade Secrets") owned, used, or licensed by any Acquired Company
               as licensee or licensor.

               (b) Agreements--Part 3.20(b) of the Disclosure Letter contains a
complete and accurate list of all Contracts relating to the Intellectual
Property Assets to which any Acquired Company is a party or by which any
Acquired Company is bound, except for any license implied by the sale of a
product and perpetual, paid-up licenses for commonly available software programs
with a value of less than $15,000 under which an Acquired Company is the
licensee. There are no outstanding and, to Shareholders' and the Acquired
Companies' Knowledge, no Threatened disputes or disagreements with respect to
any such agreement.

               (c) Know-How Necessary for the Business

                   (i) Except as set forth in Part 3.20 of the Disclosure
               Letter, the Intellectual Property Assets are all those necessary
               for the operation of the Acquired Companies' businesses as they
               are currently conducted. Except as set forth in Part 3.20(c) of
               the Disclosure Letter and for Intellectual Property Assets
               licensed to the Acquired Companies as described in Part 3.20(b)
               of the Disclosure Letter, one or more of the Acquired Companies
               is the owner of all right, title, and interest in and to each of
               the Intellectual Property Assets, free and clear of all liens,
               security interests, charges, Encumbrances, equities, and other
               adverse claims, and has the right to use without payment to a
               third party all of the Intellectual Property Assets.

                   (ii) Except as set forth in Part 3.20(c) of the Disclosure
               Letter, the Acquired Companies have received written Contracts
               that assign to one or more of the Acquired Companies all rights
               to any inventions, improvements, discoveries, or information
               relating to the business of any Acquired Company developed by
               former or current employees during any such employee's employment
               with the Acquired Companies. To the Knowledge of Shareholders and
               the Acquired Companies, no employee of any Acquired Company has
               entered into any Contract that restricts or limits in any way the
               scope or type of work in which the employee may be engaged or
               requires the employee to transfer, assign, or disclose
               information concerning his work to anyone other than one or more
               of the Acquired Companies.

               (d) Patents

                   (i) Part 3.20(d) of the Disclosure Letter contains a complete
               and accurate list and summary description of all Patents. Except
               as set forth in Part 3.20(d) of the Disclosure Letter, one or
               more of the Acquired Companies is the owner of all right, title,
               and interest in and to each of the Patents, free and clear of all
               liens, security interests, charges, Encumbrances, entities, and
               other adverse claims or has the right to use such Patents
               pursuant to a Contract set forth in Part 3.20(b) of the
               Disclosure Letter.

<PAGE>   31

                   (ii) Except as set forth in Part 3.20 of the Disclosure
               Letter, all of the issued Patents owned by any Acquired Company
               are currently in compliance with formal legal requirements
               (including payment of filing, examination, and maintenance fees
               and proofs of working or use), are valid and enforceable, and are
               not subject to any maintenance fees or taxes or actions falling
               due within ninety days after the Closing Date.

                   (iii) Except as set forth in Part 3.20 of the Disclosure
               Letter, to the Knowledge of Shareholders and the Acquired
               Companies, no Patent has been or is now involved in any
               interference, reissue, reexamination, or opposition proceeding.
               Except as set forth in Part 3.20(d) of the Disclosure Letter, to
               Shareholders' and the Acquired Companies' Knowledge, there is no
               potentially interfering patent or patent application of any third
               party.

                   (iv) Except as set forth in Part 3.20 of the Disclosure
               Letter, to Shareholders' and the Acquired Companies' Knowledge,
               no Patent is infringed or has been challenged or Threatened in
               any way. Except as set forth in Part 3.20 of the Disclosure
               Letter, none of the products manufactured and sold, nor any
               process or know-how used, by any Acquired Company infringes or is
               alleged to infringe any patent or other proprietary right of any
               other Person.

                   (v) Except as set forth in Part 3.20 of the Disclosure
               Letter, all products made, used, or sold under the Patents have
               been marked with the proper patent notice.

               (e) Trademarks

                   (i) Part 3.20(e) of Disclosure Letter contains a complete and
               accurate list and summary description of all Marks. Except as set
               forth in Part 3.20 of the Disclosure Letter, one or more of the
               Acquired Companies is the owner of all right, title, and interest
               in and to each of the Marks, free and clear of all liens,
               security interests, charges, Encumbrances, equities, and other
               adverse claims or has the right to use such Marks pursuant to a
               Contract set forth in Part 3.20(b) of the Disclosure Letter.

                   (ii) Except as set forth in Part 3.20 of the Disclosure
               Letter, all Marks owned by any Acquired Company that have been
               registered with the United States Patent and Trademark Office are
               currently in compliance with all formal legal requirements
               (including the timely post-registration filing of affidavits of
               use and incontestability and renewal applications), are valid and
               enforceable, and are not subject to any maintenance fees or taxes
               or actions falling due within ninety days after the Closing Date.

                   (iii) Except as set forth in Part 3.20 of the Disclosure
               Letter, to the Knowledge of Shareholders and the Acquired
               Companies, no Mark has been or is now involved in any opposition,
               invalidation, or cancellation and, to Shareholders' and the
               Acquired Companies' Knowledge, no such action is Threatened with
               the respect to any of the Marks.

                   (iv) Except as set forth in Part 3.20 of the Disclosure
               Letter, to Shareholders' and the Acquired Companies' Knowledge,
               there is no potentially interfering trademark or trademark
               application of any third party.

<PAGE>   32

                   (v) Except as set forth in Part 3.20 of the Disclosure
               Letter, to Shareholders' and the Acquired Companies' Knowledge,
               no Mark is infringed or has been challenged or threatened in any
               way. Except as set forth in Part 3.20 of the Disclosure Letter,
               none of the Marks used by any Acquired Company infringes or is
               alleged to infringe any trade name, trademark, or service mark of
               any third party.

                   (vi) Except as set forth in Part 3.20 of the Disclosure
               Letter, all products and materials containing a Mark bear the
               proper federal registration notice where permitted by law.

               (f) Copyrights

                   (i) Part 3.20(f) of the Disclosure Letter contains a complete
               and accurate list and summary description of all Copyrights.
               Except as set forth in Part 3.20(f) of the Disclosure Letter, one
               or more of the Acquired Companies is the owner of all right,
               title, and interest in and to each of the Copyrights, free and
               clear of all liens, security interests, charges, Encumbrances,
               equities, and other adverse claims or has the right to use such
               Copyright pursuant to a Contract set forth in Part 3.20(b) of the
               Disclosure Letter.

                   (ii) Except as set forth in Part 3.20 of the Disclosure
               Letter, all the Copyrights owned by any Acquired Company are
               currently in compliance with formal legal requirements, are valid
               and enforceable, and are not subject to any maintenance fees or
               taxes or actions falling due within ninety days after the date of
               Closing.

                   (iii) Except as set forth in Part 3.20 of the Disclosure
               Letter, to Shareholders' and the Acquired Companies' Knowledge,
               no Copyright is infringed or has been challenged or Threatened in
               any way. Except as set forth in Part 3.20 of the Disclosure
               Letter, none of the subject matter of any of the Copyrights
               infringes or is alleged to infringe any copyright of any third
               party or is a derivative work based on the work of a third party.

                   (iv) Except as set forth in Part 3.20 of the Disclosure
               Letter, all works encompassed by the Copyrights have been marked
               with the proper copyright notice to the extent required by
               applicable law in order to protect the rights of the Acquired
               Companies pursuant to such Copyrights.

               (g) Trade Secrets

                   (i) With respect to each Trade Secret, the documentation
               relating to such Trade Secret is current, accurate, and
               sufficient in detail and content to identify and explain it and
               to allow its full and proper use without reliance on the
               knowledge or memory of any individual.

                   (ii) Shareholders and the Acquired Companies have taken all
               reasonable and customary precautions to protect the secrecy,
               confidentiality, and value of their Trade Secrets.

                   (iii) Except as set forth in Part 3.20 of the Disclosure
               Letter, one or more of the Acquired Companies has good title and
               an absolute (but not necessarily exclusive) right 

<PAGE>   33

               to use the Trade Secrets. Except as set forth in Part 3.20 of
               the Disclosure Letter, the Trade Secrets are not part of the
               public knowledge or literature, and, to Shareholders' and the
               Acquired Companies' Knowledge, have not been used, divulged, or
               appropriated either for the benefit of any Person (other than
               one or more of the Acquired Companies) or to the detriment of
               the Acquired Companies. No Trade Secret is subject to any
               adverse claim or has been challenged or, to the Knowledge of
               Shareholders and the Acquired Companies, Threatened in any way.

 . Since its inception, to the Knowledge of Shareholders and the Acquired
Companies, no Acquired Company or director, officer, agent, or employee of any
Acquired Company, or any other Person associated with or acting for or on behalf
of any Acquired Company, has directly or indirectly (a) made any contribution,
gift, bribe, rebate, payoff, influence payment, kickback, or other payment to
any Person, private or public, regardless of form, whether in money, property,
or services (i) to obtain favorable treatment in securing business, (ii) to pay
for favorable treatment for business secured, (iii) to obtain special
concessions or for special concessions already obtained, for or in respect of
any Acquired Company or any Affiliate of an Acquired Company, or (iv) in
violation of any Legal Requirement, (b) established or maintained any fund or
asset that has not been recorded in the books and records of the Acquired
Companies.

 . Except as set forth in Part 3.22 of the Disclosure Letter, none of the
Acquired Companies has any accrued, contingent or other liabilities of any
nature, either matured or unmatured, relating to costs associated with insuring
that the computer systems, or any software utilized by the Acquired Companies or
other components of the Acquired Companies' information technology
infrastructure are Year 2000-compliant (whether or not required to be reflected
in financial statements in accordance with GAAP, and whether due or to become
due), except for: (a) liabilities identified as such in the "liabilities" column
of the Interim Balance Sheet; and (b) normal and recurring liabilities that have
been incurred by the Acquired Companies since the date of the Interim Balance
Sheet in the Ordinary Course of Business and consistent with past practices.

 .

               (a) No representation or warranty of the Company or Shareholders
in this Agreement and no statement in the Disclosure Letter omits to state a
material fact necessary to make the statements herein or therein, in light of
the circumstances in which they were made, not misleading.

               (b) No notice given pursuant to Section 5.5 will contain any
untrue statement or omit to state a material fact necessary to make the
statements therein or in this Agreement, in light of the circumstances in which
they were made, not misleading.

 . Except as set forth in Part 3.24 of the Disclosure Letter, no Shareholder,
Related Person of Shareholder, or of any Acquired Company has, or since the
Company's inception has had, any interest in any property (whether real,
personal, or mixed and whether tangible or intangible), used in or pertaining to
the Acquired Companies' businesses. Neither any Shareholder nor, to the
Knowledge of Shareholders and the Acquired Companies, any Related Person of any
Shareholder or of any Acquired Company is, or since the Company's inception has
owned (of record or as a beneficial owner) an equity interest or any other
financial or profit interest in, a Person that has (i) had business dealings or
a material financial interest in any transaction with any Acquired 

<PAGE>   34

Company, or (ii) engaged in competition with any Acquired Company with respect
to any line of the products or services of such Acquired Company (a "Competing
Business") in any market presently served by such Acquired Company. Except as
set forth in Part 3.24 of the Disclosure Letter, neither any Shareholder nor, to
the Knowledge of Shareholders and the Acquired Companies, any Related Person of
Shareholder or of any Acquired Company is a party to any Contract with, or has
any claim or right against, any Acquired Company.

 . Except as set forth in Part 3.25 of the Disclosure Letter, none of the
Company, any Shareholder or any of its or their agents has incurred any
obligation or liability, contingent or otherwise, for brokerage or finders' fees
or agents' commissions or other similar payment in connection with this
Agreement.

 . Part 3.26(i) of the Disclosure Letter lists the current customers,
distributors and agents, from inception until the date of this Agreement, of the
products manufactured and services performed by or for the Acquired Companies,
and Part 3.26(ii) lists the current suppliers, from the date of inception until
the date of this Agreement, of the products and services material to the
businesses of the Acquired Companies. Except as set forth in Part 3.26(i) or
3.26(ii), neither Shareholders nor any of the Acquired Companies has, (based on
Shareholders' or the Acquired Companies' commercial dealings therewith),
received any notice of, and knows of no reasonable basis for, any development
which as a result of such dealings threatens to affect adversely its existing or
future arrangements with the foregoing suppliers and customers.

 . True and complete copies of all documents referred to in the Agreement
(including without limitation this section) have been furnished, or made
available, to Buyer by the Company, Shareholder or the Acquired Companies.

 . In addition to the representations and warranties set forth in Section 3
hereof, each Shareholder (unless otherwise indicated) severally represents and
warrants to Buyer as follows:

 . This Agreement constitutes the legal, valid, and binding obligation of such
Shareholder, enforceable against such Shareholder in accordance with its terms,
except as such enforceability may be limited by laws of general application
relating to bankruptcy, insolvency and the relief of debtors and to rules of law
governing equitable remedies. Upon the execution and delivery by such
Shareholder of the Escrow Agreement and the Release (the "Shareholders' Closing
Documents"), the Shareholders' Closing Documents will constitute the legal valid
and binding obligations of such Shareholder, if applicable, enforceable against
Shareholders in accordance with their respective terms, except as enforceability
may be limited by laws of general application relating to bankruptcy, insolvency
and the relief of debtors and to rules of law governing equitable remedies. In
addition, upon the execution and delivery by Parent of the product Supply
Agreement and Amendment No. 1 to License Agreement (the "Parent's Closing
Documents"), the Parent's Closing Documents will constitute the legal and
binding obligations of Parent, enforceable against Parent in accordance with
their respective terms, except as enforceability may be limited by laws of
general application relating to bankruptcy, insolvency and the relief of debtors
and to rules of law governing equitable remedies.

 . Each Shareholder has the absolute and unrestricted right, power, authority and
capacity to execute and deliver this Agreement and the Shareholders' Closing
Documents and to perform his or its obligations pursuant to this Agreement and
the Shareholders' Closing Documents. In addition, 

<PAGE>   35

Parent has the absolute and unrestricted right, power, authority and capacity to
execute the Parent's Closing Documents and to perform its obligations pursuant
to the Parent's Closing Documents.

 . Buyer represents and warrants to the Company and Shareholders as follows:

 . Buyer is a corporation duly organized, validly existing, and in good standing
under the laws of the State of Arizona, with full corporate power and authority
to conduct its business as it is now being conducted and to own or use the
properties and assets that it purports to own or use.

 .

               (a) This Agreement constitutes the legal, valid, and binding
obligation of Buyer, enforceable against Buyer in accordance with its terms.
Upon the execution and delivery by Buyer of the Escrow Agreement, the Employment
Agreements, the Product Supply Agreement and the License Agreement
(collectively, the "Buyer's Closing Documents"), the Buyer's Closing Documents
will constitute the legal, valid, and binding obligations of Buyer, enforceable
against Buyer in accordance with their respective terms, except as such
enforceability may be limited by laws of general application relating to
bankruptcy, insolvency and the relief of debtors and to rules of law governing
equitable remedies. Buyer has the absolute and unrestricted right, power, and
authority to execute and deliver this Agreement and the Buyer's Closing
Documents and to perform its obligations under this Agreement and the Buyer's
Closing Documents.

               (b) Except as set forth in Schedule 4.2, neither the execution
and delivery of this Agreement by Buyer nor the consummation or performance of
any of the Contemplated Transactions by Buyer will give any Person the right to
prevent, delay, or otherwise interfere with any of the Contemplated Transactions
pursuant to:

                   (i) any provision of Buyer's Organizational Documents;

                   (ii) any resolution adopted by the board of directors or the
               stockholders of Buyer; or

                   (iii) any Legal Requirement or Order to which Buyer may be
               subject.

        Except as set forth in Schedule 4.2, Buyer is not and will not be
required to obtain any Consent from any Person in connection with the execution
and delivery of this Agreement or the consummation or performance of any of the
Contemplated Transactions.

 . The authorized capital stock of Buyer consists of 100,000,000 shares of Buyer
Common Stock. At the close of business on March 31, 1998, _____ shares of Buyer
Common Stock were outstanding, and ______ shares of Buyer Common Stock were
issuable upon the exercise of outstanding stock options and warrants. As of
March 31, 1998, an aggregate of ____ shares of Buyer Common Stock were available
for future issuance pursuant to Buyer's stock option plans. No shares of Buyer
Common Stock are held by Buyer in its treasury, and no shares of Buyer Preferred
Stock were outstanding. All the outstanding shares of Buyer Common Stock are
validly issued, fully paid, nonassessable and free of preemptive rights.

<PAGE>   36

 . There is no pending Proceeding that has been commenced against Buyer and that
challenges, or may have the effect of preventing, delaying, making illegal, or
otherwise interfering with, any of the Contemplated Transactions. To Buyer's
Knowledge, no such Proceeding has been Threatened.

 . Buyer has furnished the Company with a true and complete copy of each form,
statement, annual, quarterly and other report, registration statement (including
exhibits and amendments) and definitive proxy statement filed by Buyer with the
U.S. Securities and Exchange Commission ("SEC") since December 31, 1996 (the
"Buyer SEC Documents"), which are all the documents (other than preliminary
material) that Buyer was required to file with the SEC since such date. As of
their respective filing dates, the Buyer SEC Documents complied in all material
respects with the requirements of the Exchange Act and the rules and regulations
thereunder, and none of the Buyer SEC Documents contained any untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements made therein, in light of the
circumstances in which they were made, not misleading. Since the filing of the
most recent Quarterly Report on Form 10-Q included in the Buyer SEC Documents,
none of Buyer's organizational documents has been amended or modified.

 . Buyer and its officers and agents have incurred no obligation or liability,
contingent or otherwise, for brokerage or finders' fees or agents' commissions
or other similar payment in connection with this Agreement and will indemnify
and hold Shareholders harmless from any such payment alleged to be due by or
through Buyer as a result of the action of Buyer or its officers or agents.

 .

 . Between the date of this Agreement and the Closing Date, the Company and
Parent will, and will cause each Acquired Company and its Representatives to,
and each of Messrs. Sadr and Meshkinpour will, and will use their respective
Best Efforts to cause each Acquired Company and its Representatives to, (a)
afford Buyer and its Representatives reasonable access, during normal business
hours and upon reasonable notice, to each Acquired Company's personnel,
properties (including subsurface testing), contracts, books and records, and
other documents and data, (b) furnish Buyer and its Representatives with copies
of all such contracts, books and records, and other existing documents and data
as Buyer may reasonably request, and (c) furnish Buyer and its Representatives
with such additional financial, operating, and other data and information as
Buyer may reasonably request.

 . Between the date of this Agreement and the Closing Date, the Company and
Parent will, and will cause each Acquired Company and its Representatives to,
and each of Messrs. Sadr and Meshkinpour will, and will use their respective
Best Efforts to cause each Acquired Company and its Representatives to:

               (a) conduct the business of such Acquired Company only in the
Ordinary Course of Business;

               (b) use their Best Efforts to preserve intact the current
business organization of such Acquired Company, keep available the services of
the current officers, employees, and agents of such Acquired Company, and
maintain the relations and good will with 

<PAGE>   37

suppliers, customers, landlords, creditors, employees, agents, and others having
business relationships with such Acquired Company;

               (c) not sell, lease or otherwise dispose of, or agree to sell,
lease or otherwise dispose of, any of the Acquired Assets, except in the
Ordinary Course of Business consistent with prior practice; 

               (d) except for the transactions to be effected pursuant to the
Share Purchase Agreement, not declare or pay any dividends or agree to make any
other distribution with respect to any shares of the Company's capital stock;

               (e) not alter or modify the Company's policies, practices or
procedures with respect to the origination and collection of accounts receivable
or the origination and payment of accounts payable (it being represented that
such policies, practices and procedures will have been in effect for at least
180 days prior to the Closing Date and it being understood that the Company will
maintain normal pricing, payment and other terms with its customers and
suppliers during such period);

               (f) confer with Buyer concerning operational matters of a
material nature; and

               (g) otherwise report periodically to Buyer concerning the status
of the business, operations, and finances of such Acquired Company.

 . Except as otherwise expressly permitted by this Agreement, between the date of
this Agreement and the Closing Date, the Company and Parent will not, and will
cause each Acquired Company and its Representatives not to, and each of Messrs.
Sadr and Meshkinpour will not, and will use their respective Best Efforts to
cause each Acquired Company and its Representatives not to, without the prior
consent of Buyer, take any affirmative action, or fail to take any reasonable
action within their or its control, as a result of which any of the changes or
events listed in Section 3.16 is likely to occur.

 . As promptly as practicable after the date of this Agreement, the Company and
Parent will, and will cause each Acquired Company and its Representatives to,
and each of Messrs. Sadr and Meshkinpour will, and will use their respective
Best Efforts to cause each Acquired Company and its Representatives to, make all
filings required by Legal Requirements to be made by them in order to consummate
the Contemplated Transactions. Between the date of this Agreement and the
Closing Date, the Company and Parent will, and will cause each Acquired Company
and its Representatives to, and each of Messrs. Sadr and Meshkinpour will, and
will use their respective Best Efforts to cause each Acquired Company and its
Representatives to, (a) cooperate with Buyer with respect to all filings that
Buyer elects to make or is required by Legal Requirements to make in connection
with the Contemplated Transactions, and (b) cooperate with Buyer in obtaining
all consents identified in Schedule 4.2 (including taking all actions requested
by Buyer to cause early termination of any applicable waiting period under the
HSR Act).

 . Between the date of this Agreement and the Closing Date, each of the Company
and Shareholders will promptly notify Buyer in writing if the Company,
Shareholders or any Acquired Company becomes aware of any fact or condition that
causes or constitutes a Breach of any of the Company 

<PAGE>   38

and Shareholders' representations and warranties as of the date of this
Agreement, or if the Company, Shareholders or any Acquired Company becomes aware
of the occurrence after the date of this Agreement of any fact or condition that
would (except as expressly contemplated by this Agreement) cause or constitute a
Breach of any such representation or warranty had such representation or
warranty been made as of the time of occurrence or discovery of such fact or
condition. Should any such fact or condition require any change in the
Disclosure Letter if the Disclosure Letter were dated the date of the occurrence
or discovery of any such fact or condition, the Company and Shareholders will
promptly deliver to Buyer a supplement to the Disclosure Letter specifying such
change. During the same period, the Company and Shareholders will promptly
notify Buyer of the occurrence of any Breach of any covenant of the Company or
Shareholders in this Section 5 or of the occurrence of any event that may make
the satisfaction of the conditions in Section 7 impossible or unlikely.

 . Until such time, if any, as this Agreement is terminated pursuant to Section
11, Parent will not, and will cause each Acquired Company and their
Representatives not to, and each of Messrs. Sadr and Meshkinpour will not, and
will use their respective Best Efforts to cause each Acquired Company and its
Representatives not to, directly or indirectly solicit, initiate, or encourage
any inquiries or proposals from, discuss or negotiate with, provide any
non-public information to, or consider the merits of any unsolicited inquiries
or proposals from, any Person (other than Buyer) relating to any transaction
involving the sale of the business or assets (other than in the Ordinary Course
of Business) of any Acquired Company, or any of the capital stock of any
Acquired Company, or any merger, consolidation, business combination, or similar
transaction involving any Acquired Company.

 . The Company and Parent shall comply in all respects, and provide Buyer all
information required to comply with the provisions of any so-called "bulk sales
law" of any relevant jurisdiction in connection with the sale of the Acquired
Assets to Buyer.

 .

               (a) The Company shall, and Parent shall cause the Company and its
Representatives to, at Shareholders' cost and expense, obtain prior to the
Closing any and all Consents necessary for the valid and binding assignment of
the Named Contracts to Buyer. All such Consents will be in writing and in form
and substance reasonably satisfactory to Buyer (including without limitation
economic terms and conditions that are no less favorable to Buyer than currently
exist for the Company), and executed counterparts thereof will be delivered to
Buyer no later than the Closing.

               (b) Subject to the provisions of Section 5.9(a) above, to the
extent that the assignment or sublease of any Assumed Contract requires the
consent of a third party, this Agreement shall not constitute an agreement to
assign or sublease the same if an attempted assignment or sublease thereof,
without the Consent of a third party thereto, would constitute a breach thereof,
but each Shareholder and the Company shall use its Best Efforts to obtain the
consent of such other parties to all such contracts to the assignment or
sublease thereof to Buyer prior to the Closing Date; if such Consent is not
obtained or is obtainable only upon payment by 

<PAGE>   39

Buyer of amounts not otherwise required to be paid under the terms of such
contract, Shareholders and the Company will cooperate with Buyer in any
reasonable arrangement which is designed to provide for Buyer the benefits under
any such Assumed Contract including enforcement for the benefit of Buyer at the
sole expense of Buyer, of any and all rights of the Company against any third
party thereto arising out of the failure or refusal of such third party to
consent to such assignment or sublease.

 . Between the date of this Agreement and the Closing Date, the Company and
Shareholders will use their Best Efforts to cause the conditions in Sections 7
and 8 to be satisfied.

 .

 . As promptly as practicable after the date of this Agreement, Buyer will, and
will cause each of its Related Persons to, make all filings required by Legal
Requirements to be made by them to consummate the Contemplated Transactions
(including all filings under the HSR Act). Between the date of this Agreement
and the Closing Date, Buyer will, and will cause each Related Person to,
cooperate with the Company and Parent with respect to all filings that the
Company and Parent are required by Legal Requirements to make in connection with
the Contemplated Transactions, and (ii) cooperate with the Company and Parent in
obtaining all consents identified in Part 3.2 of the Disclosure Letter; provided
that this Agreement will not require Buyer to dispose of or make any change in
any portion of its business or to incur any other burden to obtain a
Governmental Authorization.

 . Except as set forth in the proviso to Section 6.1, between the date of this
Agreement and the Closing Date, Buyer will use its Best Efforts to cause the
conditions in Sections 7 and 8 to be satisfied.

 . Buyer will, within three (3) business days of the filing thereof, deliver to
the Company a true and correct copy of all forms, statements, annual, quarterly
and other reports, registration statements and definitive proxy statements filed
by Buyer with the SEC after the date of this Agreement and prior to the Closing
Date.

 . Except as otherwise expressly permitted by this Agreement, between the date of
this Agreement and the Closing Date, Buyer will not, without the prior consent
of the Company, (a) amend or repeal any of its Organizational Documents, (b)
declare or pay any dividend or make any other distribution or payment in respect
of its capital stock or (c) issue shares of Buyer Common Stock except (i) upon
the exercise of stock options outstanding on the date hereof or granted after
the date hereof pursuant to stock plans in effect on the date hereof, (ii)
pursuant to Buyer's employee stock purchase plan or (iii) at a price equal to
the fair value of such Common Stock on the date of issuance.

 . To the extent the Company has paid any liabilities reflected on the Interim
Balance Sheet or any liabilities incurred in the Ordinary Course of Business
thereafter with the prior written consent of Buyer, then Buyer shall reimburse
the Company after the Closing for such amounts as soon as reasonably practicable
after demand by the Company.

<PAGE>   40

               6.6 Accounts Receivable. After the Closing, Buyer will use its
reasonable commercial efforts with respect to the collection of the Accounts
Receivable as of the Interim Balance Sheet.

 . After the Closing, Buyer will use its Best Efforts to resolve amicably the
Allied matter disclosed in part 3.15 of the Disclosure Letter, including
providing reasonable customer support to Allied.

 . Buyer's obligation to purchase the Shares and to take the other actions
required to be taken by Buyer at the Closing is subject to the satisfaction, at
or prior to the Closing, of each of the following conditions (any of which may
be waived by Buyer, in whole or in part):

 .

               (a) All of the Company's and Shareholders' representations and
warranties in this Agreement (considered collectively), and each of these
representations and warranties (considered individually), must have been true
and correct in all material respects as of the date of this Agreement, and must
be true and correct in all material respects as of the Closing Date as if made
on the Closing Date, without giving effect to any supplement to the Disclosure
Letter, except in such cases where the failure to be so true and correct does
not have a material adverse effect on the Acquired Companies, taken as a whole.

               (b) Each of the Company's and Shareholders' representations and
warranties in Section 3.12 must have been accurate in all respects as of the
date of this Agreement, and must be accurate in all respects as of the Closing
Date as if made on the Closing Date, without giving effect to any supplement to
the Disclosure Letter.

 .

               (a) All of the covenants and obligations that the Company and
Shareholders are required to perform or to comply with pursuant to this
Agreement at or prior to the Closing (considered collectively), and each of
these covenants and obligations (considered individually), must have been duly
performed and complied with in all material respects.

               (b) Each document required to be delivered by the Company or
Shareholders pursuant to Section 2.5 must have been delivered by the Company or
Shareholders, as applicable, and each of the other covenants and obligations in
Sections 5.4 and 5.8 must have been performed and complied with in all material
respects.

 . Each of the Consents required to fully and validly assign the Named Contracts
to Buyer shall have been obtained and shall be in full force and effect.

 . Each of the following documents must have been delivered to Buyer:

               (a) an opinion of Stradling Yocca Carlson & Rauth, A Professional
Corporation, dated the Closing Date, in substantially the form of Exhibit 7.4(a)
and reasonably satisfactory to Buyer;


<PAGE>   41

               (b) an opinion of Arter & Hadden LLP, dated the Closing Date, in
substantially the form of Exhibit 7.4(b) and reasonably satisfactory to Buyer;

               (c) Parent and the Company shall have delivered to Buyer bills of
sale conveying the Acquired Assets, in each case in form and substance
reasonably satisfactory to Buyer and its counsel; and

               (d) such other documents as Buyer may reasonably request for the
purpose of (i) enabling its counsel to provide the opinion referred to in
Section 8.4(a), (ii) evidencing the accuracy of any of the Company's and
Shareholders' representations and warranties, (iii) evidencing the performance
by the Company and any Shareholder of the Company of, or the compliance by the
Company and any Shareholder with, any covenant or obligation required to be
performed or complied with by the Company or such Shareholder, (iv) evidencing
the satisfaction of any condition referred to in this Section 7 or (v) otherwise
facilitating the consummation or performance of any of the Contemplated
Transactions.

 . Since the date of this Agreement, there must not have been commenced or
Threatened against Buyer, or against any Person affiliated with Buyer, any
Proceeding (a) involving any challenge to, or seeking damages or other relief in
connection with, any of the Contemplated Transactions, or (b) that may have the
effect of preventing, delaying, making illegal, or otherwise interfering with
any of the Contemplated Transactions.

 . There must not have been made or Threatened by any Person any claim asserting
that such Person (a) is the holder or the beneficial owner of, or has the right
to acquire or to obtain beneficial ownership of, any stock of, or any other
voting, equity, or ownership interest in, any of the Acquired Companies, or (b)
is entitled to all or any portion of the Purchase Price payable for the Shares.

 . Neither the consummation nor the performance of any of the Contemplated
Transactions will, directly or indirectly (with or without notice or lapse of
time), materially contravene, or conflict with, or result in a material
violation of, or cause Buyer or any Person affiliated with Buyer to suffer any
material adverse consequence under, (a) any applicable Legal Requirement or
Order, or (b) any Legal Requirement or Order that has been published by or
before any Governmental Body.

 . The Share Purchase Agreement shall be in full force and effect as of the
Closing and shall not have been amended or modified. The transactions
contemplated by the Share Purchase Agreement shall have been consummated
immediately prior to the Closing.

 . The Company's and Shareholders' obligation to sell the Acquired Assets and to
take the other actions required to be taken by Shareholders at the Closing is
subject to the satisfaction, at or prior to the Closing, of each of the
following conditions (any of which may be waived by Shareholders, in whole or in
part):

 . All of Buyer's representations and warranties in this Agreement (considered
collectively), and each of these representations and warranties (considered
individually), must have been true and correct in all material respects as of
the date of this Agreement and must be true and correct in all 

<PAGE>   42

material respects as of the Closing Date as if made on the Closing Date, except
in such cases where the failure to be so true and correct does not have a
material adverse effect on Buyer.

 .

               (a) All of the covenants and obligations that Buyer is required
to perform or to comply with pursuant to this Agreement at or prior to the
Closing (considered collectively), and each of these covenants and obligations
(considered individually), must have been performed and complied with in all
material respects.

               (b) Buyer must have delivered each of the documents required to
be delivered by Buyer pursuant to Section 2.5 and must have made the cash
payments required to be made by Buyer pursuant to Section 2.5(b)(i) .

 . Each of the Consents identified in Part 3.2 of the Disclosure Letter must have
been obtained and must be in full force and effect.

 . Buyer must have caused the following documents to be delivered to
Shareholders:

               (a) an opinion of Wilson Sonsini Goodrich & Rosati, Professional
Corporation, dated the Closing Date, in the form of Exhibit 8.4(a); and

               (b) such other documents as Shareholders may reasonably request
for the purpose of (i) enabling their counsel to provide the opinion referred to
in Section 7.4(a), (ii) evidencing the accuracy of any representation or
warranty of Buyer, (iii) evidencing the performance by Buyer of, or the
compliance by Buyer with, any covenant or obligation required to be performed or
complied with by Buyer, (iv) evidencing the satisfaction of any condition
referred to in this Section 8, or (v) otherwise facilitating the consummation of
any of the Contemplated Transactions.

 . Since the date of this Agreement, there must not have been commenced or
Threatened against Shareholders, or against any Person affiliated with
Shareholders, any Proceeding (a) involving any challenge to, or seeking damages
or other relief in connection with, any of the Contemplated Transactions, or (b)
that may have the effect of preventing, delaying, making illegal, or otherwise
interfering with any of the Contemplated Transactions.

 . Neither the consummation or the performance of any of the Contemplated
Transactions will, directly or indirectly (with or without notice or lapse of
time), materially contravene or conflict, result in a material violation of, or
cause Shareholders to suffer any material adverse consequences under, (a) any
applicable Legal Requirement or Order, or (b) any Legal Requirement or Order
that has been published by or before any Governmental Body.

<PAGE>   43

 .

               (a) Parent understands that Buyer shall be entitled to protect
and preserve the going concern value of the business (as presently conducted)
related to the Acquired Assets (including Internet Protocol ("IP") business
communication products such as IP PBXs, IP ACD systems and IP wired telephones)
(the "Buyer's Business") to the extent permitted by law and that Buyer would not
have entered into this Agreement absent the provisions of this Section 10.
Parent agrees that neither it nor any of its affiliates or Subsidiaries will (i)
prior to the fourth anniversary of the Closing Date, use the Licensed Technology
(defined below) to engage in any business competing with the Buyer's Business,
(ii) prior to the fourth anniversary of the Closing Date, directly or indirectly
induce any employee of Buyer or any Subsidiary of Buyer to leave such employ, or
to accept any other position of employment or assist any other Person in hiring
such employee and (iii) at any time communicate or divulge to any Person other
than Buyer any secret or confidential information, knowledge or data related to
the Acquired Assets or the Buyer's Business, all of which it agrees to hold in a
fiduciary capacity for the benefit of Buyer. For the purposes of this Section
10(a) and Section 10(b), the phrase "directly or indirectly engage in" shall
include having a direct or indirect ownership interest (other than ownership of
less than 5% of the outstanding voting securities of a Person who has voting
securities registered under Section 12 of the Exchange Act) in any Person which
engages in the business in question. In addition, for the purposes of this
Section 10(a), "Licensed Technology" means the technology licensed by Buyer to
Parent pursuant to that certain Amendment No.1 to License Agreement of even date
herewith between Buyer and Parent.

               (b) Buyer understands that Parent shall be entitled to protect
and preserve the going concern value of its business to the extent permitted by
law and that Parent would not have entered into this Agreement absent the
provisions of this Section 10. Buyer agrees that neither it nor any of its
affiliates or Subsidiaries will (i) prior to the fourth anniversary of the
Closing Date, use the Acquired Assets to (x) engage in the sales or marketing of
satellite and wireless communication products or (y) license or sublicense the
Acquired Assets to direct, current competitors of Parent in the business of
sales and marketing of satellite and wireless communication products, (ii) prior
to the fourth anniversary of the Closing Date, directly or indirectly induce any
employee of Parent or a Subsidiary of Parent (other than employees of the
Company) to leave such employ, or to accept any other position of employment or
assist any other Person in hiring such employee and (iii) at any time
communicate or divulge to any Person other than Parent any secret or
confidential information, knowledge or data related to the business of Parent,
all of which it agrees to hold in a fiduciary capacity for the benefit of
Parent.

               (c) Notwithstanding any provision of this Agreement, it is
understood and agreed that the remedy of indemnity payment pursuant to Section
12 and other remedies at law would be inadequate in the case of any Breach of
the covenants contained in Section 10 and Parent agrees that Buyer and Parent
shall be entitled to equitable relief, including the remedy of specific
performance, with respect to any Breach or attempted Breach of such covenants.

 .

 . This Agreement may, by notice given prior to or at the Closing, be terminated:

               (a) by either Buyer, on the one hand, or the Company and/or
Shareholders, on the other, if a material Breach of any provision of this
Agreement has been committed by the other party and such Breach has not been
waived;

<PAGE>   44

               (b) (i) by Buyer if any of the conditions in Section 7 has not
been satisfied as of the Closing Date or if satisfaction of such a condition is
or becomes impossible (other than through the failure of Buyer to comply with
its obligations under this Agreement) and Buyer has not waived such condition on
or before the Closing Date; or (ii) by the Company and/or Shareholder, if any of
the conditions in Section 8 has not been satisfied as of the Closing Date or if
satisfaction of such a condition is or becomes impossible (other than through
the failure of Shareholders to comply with their obligations under this
Agreement) and the Company and/or Shareholders have not waived such condition on
or before the Closing Date;

               (c) by mutual consent of Buyer, the Company and Shareholders; or

               (d) by any of Buyer, the Company or Shareholders if the Closing
has not occurred on or before June 30, 1998, or such later date as the parties
may agree upon; provided, however, that the right to terminate this Agreement
under this Section 11.1(d) shall not be available to any party whose action or
failure to act has been a principal cause of or resulted in the failure of the
Contemplated Transactions to occur on or before such date and such action
constitutes a Breach of this Agreement.

 . Each party's right of termination under Section 11.1 is in addition to any
other rights it may have under this Agreement or otherwise, and the exercise of
a right of termination will not be an election of remedies. If this Agreement is
terminated pursuant to Section 11.1, all further obligations of the parties
under this Agreement will terminate, except that the obligations in Sections
13.1 and 13.3 will survive; provided, however, that if this Agreement is
terminated by a party because of the Breach of the Agreement by the other party
or because one or more of the conditions to the terminating party's obligations
under this Agreement is not satisfied as a result of the other party's failure
to comply with its obligations under this Agreement, the terminating party's
right to pursue all legal remedies will survive such termination unimpaired.

 .

 . All representations, warranties, covenants, and obligations in this Agreement,
the Disclosure Letter, the supplements to the Disclosure Letter, the certificate
delivered pursuant to Section 2.4(a)(vi), and any other certificate or document
delivered pursuant to this Agreement will survive the Closing, subject to the
time limitations set forth in Section 12.4. The right to indemnification,
payment of Damages or other remedy based on such representations, warranties,
covenants, and obligations will not be affected by any investigation conducted
with respect to, or any Knowledge acquired (or capable of being acquired) at any
time, whether before or after the execution and delivery of this Agreement or
the Closing Date, with respect to the accuracy or inaccuracy of or compliance
with, any such representation, warranty, covenant, or obligation. If any party
acquires knowledge of a Breach of any such representation, warranty, covenant or
obligation, it shall promptly notify the breaching party of such Breach.

 . Shareholders will indemnify and hold harmless Buyer, and its Representatives,
stockholders, controlling persons, and affiliates (collectively, the
"Indemnified Persons") for, and will pay to the Indemnified Persons the amount
of, any loss, liability, claim, damage, expense (including costs of
investigation and defense and reasonable attorneys' fees) or diminution of
value, whether or not 

<PAGE>   45

involving a third-party claim (collectively, "Damages"), arising, directly or
indirectly, from or in connection with:

               (a) any Breach of any representation or warranty made by the
Company or Shareholders in this Agreement, the Disclosure Letter, the
supplements to the Disclosure Letter (provided that Buyer shall not be entitled
to indemnification with respect to representations and warranties made in this
Agreement that are corrected by supplements to the Disclosure Letter if such
supplements have been agreed to and accepted by Buyer in writing or Buyer
effects the Closing after having received such supplement) or any other
certificate or document delivered by the Company or Shareholders pursuant to
this Agreement;

               (b) any Breach of any representation or warranty made by the
Company or Shareholders in this Agreement as if such representation or warranty
were made on and as of the Closing Date other than any such Breach that is
disclosed in a supplement to the Disclosure Letter;

               (c) any Breach by the Company or Shareholders of any covenant or
obligation of the Company or Shareholders in this Agreement;

               (d) any claim by any Person for brokerage or finder's fees or
commissions or similar payments based upon any agreement or understanding
alleged to have been made by any such Person with the Company or Shareholders
(or any Person acting on their behalf) in connection with any of the
Contemplated Transactions;

               (e) any Liability of the Company or the Shareholders which is not
an Assumed Liability (including any Liability of the Company or the Shareholders
that becomes a Liability of the Buyer by operation of law under any bulk
transfer law of any jurisdiction, under any common law doctrine of defacto
merger or successor liability, or otherwise);

               (f) any Liability in respect of any Taxes relating to the
Acquired Assets attributable to any period beginning before and ending on the
Closing Date; or

               (g) any liability with respect to any Damages arising, directly
or indirectly, from or in connection with the Company's dispute with Allied
Communications Holdings, LLC set forth in Part 3.15 of the Disclosure Letter.

        Absent fraud, deliberate misrepresentation or wilful misconduct, the
remedies provided in this Section 12.2 will be the exclusive contractual
remedies that may be available to Buyer or the other Indemnified Persons.

 . Buyer will indemnify and hold harmless Shareholders, and will pay to
Shareholders the amount of any Damages arising, directly or indirectly, from or
in connection with (a) any Breach of any representation or warranty made by
Buyer in this Agreement or in any certificate delivered by Buyer pursuant to
this Agreement, (b) any Breach by Buyer of any covenant or obligation of Buyer
in this Agreement, or (c) any claim by any Person for brokerage or finder's fees
or commissions or similar payments based upon any agreement or understanding
alleged to have been made by such Person with Buyer (or any Person acting on its
behalf) in connection with any of the Contemplated Transactions.

<PAGE>   46

 . If the Closing occurs, Shareholders will have no liability (for
indemnification or otherwise) with respect to any representation or warranty, or
covenant or obligation to be performed and complied with prior to the Closing
Date, other than those in Sections 3.3, 3.11 and 3.20 unless on or before the
date that is two years after the date of the Closing Buyer notifies Shareholders
of a claim specifying the factual basis of that claim in reasonable detail to
the extent then known by Buyer; a claim with respect to Section 3.20, may be
made on or before the date that is three years after the date of the Closing; a
claim with respect to Sections 3.3 and 3.11 or a noncontractual claim for
indemnification or reimbursement not based upon any representation or warranty
or any covenant or obligation to be performed and complied with prior to the
Closing Date, may be made at any time, subject to applicable statutes of
limitations. If the Closing occurs, Buyer will have no liability (for
indemnification or otherwise) with respect to any representation or warranty, or
covenant or obligation to be performed and complied with prior to the Closing
Date, unless on or before the date that is two years after the date of the
Closing Shareholders notify Buyer of a claim specifying the factual basis of
that claim in reasonable detail to the extent then known by Shareholders.

 .

               (a) Shareholders will have no liability (for indemnification or
otherwise) with respect to the matters described in clause (a), clause (b),
clause (g) or, to the extent relating to any failure to perform or comply prior
to the Closing Date, clause (c) of Section 12.2 until the total of all Damages
with respect to all such matters in the aggregate exceeds $300,000, whereupon
Shareholders shall have liability with respect to all such Damages in excess of
such $300,000 amount. The maximum liability (for indemnification or otherwise)
with respect to the matters set forth in Section 3.20 shall be $6,000,000 and,
in addition, the maximum liability (for indemnification or otherwise) with
respect to all other matters (except for matters related to Sections 3.3 and
3.11 and indemnification pursuant to Section 12.2(g)) shall be $3,000,000. The
Shareholders' liability (for indemnification or otherwise) with respect to the
matters set forth in Section 3.20 shall be exclusive of their liability with
respect to all other matters, and no Indemnified Person shall be permitted to
claim Damages for other matters if such matters are directly related to Damages
sought with respect to the matters set forth in Section 3.20. There shall be no
maximum liability with respect to matters related to Sections 3.3 and 3.11 and
with respect to indemnification pursuant to Section 12.2(g).

               (b) The liability of each Shareholder pursuant to Section 12.2
with respect to any claim for indemnification, the payment of Damages or other
remedy based on the joint and several representations, warranties, covenants and
obligations of the Shareholders (whether claimed against the Escrow Amount or
otherwise) shall be equal to such Shareholder's "Pro Rata Portion" of Damages
incurred by Indemnified Persons, as set forth below. For the purposes of this
Agreement, Parent's Pro Rata Portion shall equal 72.5%, Sadr's Pro Rata Portion
shall equal 17.875% and Meshkinpour's Pro Rata Portion shall equal 9.625%.

 . Buyer will have no liability (for indemnification or otherwise) with respect
to the matters described in clause (a) or, to the extent relating to any failure
to perform or comply prior to the Closing Date Clause (b) of Section 12.3 until
the total of all Damages with respect to all such matters in the aggregate
exceeds $300,000, whereupon Buyer shall have liability only with respect to such
Damages in excess of such $300,000 amount.

<PAGE>   47

 . Upon notice to Shareholders specifying in reasonable detail the basis for such
set-off, Buyer may give notice of a Claim in such amount under the Escrow
Agreement. Neither the exercise of nor the failure to give a notice of a Claim
under the Escrow Agreement will constitute an election of remedies or limit
Buyer in any manner in the enforcement of any other remedies that may be
available to it.

 .

               (a) Promptly after receipt by an indemnified party under Section
12.2 or Section 12.3 of notice of the commencement of any Proceeding against it,
such indemnified party will, if a claim is to be made against an indemnifying
party under such Section, give notice to the indemnifying party of the
commencement of such claim, but the failure to notify the indemnifying party
will not relieve the indemnifying party of any liability that it may have to any
indemnified party, except to the extent that the indemnifying party demonstrates
that the defense of such action is prejudiced by the indemnifying party's
failure to give such notice.

               (b) If any Proceeding referred to in Section 12.8(a) is brought
against an indemnified party and it gives notice to the indemnifying party of
the commencement of such Proceeding, the indemnifying party will, be entitled to
participate in such Proceeding and, to the extent that it wishes (unless (i) the
indemnifying party is also a party to such Proceeding and the indemnified party
determines in good faith that joint representation would be inappropriate, or
(ii) the indemnifying party fails to provide reasonable assurance to the
indemnified party of its financial capacity to defend such Proceeding and
provide indemnification with respect to such Proceeding), to assume the defense
of such Proceeding with counsel reasonably satisfactory to the indemnified party
and, after notice from the indemnifying party to the indemnified party of its
election to assume the defense of such Proceeding, the indemnifying party will
not, as long as it diligently conducts such defense, be liable to the
indemnified party under this Section 12 for any fees of other counsel or any
other expenses with respect to the defense of such Proceeding, in each case
subsequently incurred by the indemnified party in connection with the defense of
such Proceeding, other than reasonable costs of investigation. If the
indemnifying party assumes the defense of a Proceeding, (i) it will be
conclusively established for purposes of this Agreement that the claims made in
that Proceeding are within the scope of and subject to indemnification; (ii) no
compromise or settlement of such claims may be effected by the indemnifying
party without the indemnified party's consent (which consent shall not be
unreasonably withheld) unless (A) there is no finding or admission of any
violation of Legal Requirements or any violation of the rights of any Person and
no effect on any other claims that may be made against the indemnified party,
and (B) the sole relief provided is monetary damages that are paid in full by
the indemnifying party; and (iii) the indemnified party will have no liability
with respect to any compromise or settlement of such claims effected without its
consent. If notice is given to an indemnifying party of the commencement of any
Proceeding and the indemnifying party does not, within ten days after the
indemnified party's notice is given, give notice to the indemnified party of its
election to assume the defense of such Proceeding, the indemnifying party will
be bound by any determination made in such Proceeding or any compromise or
settlement effected by the indemnified party.

               (c) Notwithstanding the foregoing, if an indemnified party
determines in good faith that there is a reasonable probability that a
Proceeding may adversely affect it or its affiliates other than as a result of
monetary damages for which it would be entitled to 

<PAGE>   48

indemnification under this Agreement, the indemnified party may, by notice to
the indemnifying party, assume the exclusive right to defend, compromise, or
settle such Proceeding, but the indemnifying party will not be bound by any
determination of a Proceeding so defended or any compromise or settlement
effected without its consent (which may not be unreasonably withheld).

               (d) Shareholders hereby consent to the non-exclusive jurisdiction
of any court in which a Proceeding is brought against any Indemnified Person for
purposes of any claim that an Indemnified Person may have under this Agreement
with respect to such Proceeding or the matters alleged therein, and agree that
process may be served on Shareholders with respect to such a claim anywhere in
the world; provided that the indemnified party is subject to the personal
jurisdiction of such court.

 . A claim for indemnification for any matter not involving a third-party claim
may be asserted by notice to the party from whom indemnification is sought.

 .

 .

               (a) Except as otherwise expressly provided in this Agreement,
each party to this Agreement will bear its respective expenses incurred in
connection with the preparation, execution, and performance of this Agreement
and the Contemplated Transactions, including all fees and expenses of agents,
representatives, counsel, and accountants. The Shareholders will pay all amounts
payable to any finder or investment banker in connection with this Agreement and
the Contemplated Transactions. Buyer will pay one-half and Parent will pay
one-half of the HSR Act filing fee.

               (b) In the event of termination of this Agreement, the obligation
of each party to pay its own expenses will be subject to any rights of such
party arising from a Breach of this Agreement by another party.

 . Any public announcement or similar publicity with respect to this Agreement or
the Contemplated Transactions will be issued, if at all, at such time and in
such manner as Buyer, the Company and Shareholders jointly determine. Unless
consented to by Buyer in advance or required by Legal Requirements, prior to the
Closing the Company and the Parent shall, and shall cause the Acquired Companies
and their Representatives to, and each of Messrs. Sadr and Meshkinpour shall,
and shall use their respective Best Efforts to cause each Acquired Company and
its Representatives to, keep this Agreement strictly confidential and may not
make any disclosure of this Agreement to any Person. Unless consented to by
Shareholders in advance or required by Legal Requirements, prior to the Closing
Buyer shall keep this Agreement strictly confidential and may not make any
disclosure of this Agreement to any Person. The Company, the Shareholders and
Buyer will consult with each other concerning the means by which the Acquired
Companies' employees, customers, and suppliers and others having dealings with
the Acquired Companies will be informed of the Contemplated Transactions, and
Buyer will have the right to be present for any such communication.

 . Between the date of this Agreement and the Closing Date, Buyer, the Company
and Shareholders will maintain in confidence, and will use their Best Efforts to
cause the directors, officers, 

<PAGE>   49

employees, agents, and advisors of Buyer, Shareholders and the Company to
maintain in confidence, any written confidential or proprietary information
identified as confidential or proprietary when originally furnished by another
party in connection with this Agreement or the Contemplated Transactions, unless
(a) such information is already known to such party or to others not bound by a
duty of confidentiality or such information becomes publicly available through
no fault of such party, (b) the use of such information is necessary or
appropriate in making any filing or obtaining any consent or approval required
for the consummation of the Contemplated Transactions, or (c) the furnishing or
use of such information is required by or necessary or appropriate in connection
with legal proceedings upon the advice of legal counsel.

        If the Contemplated Transactions are not consummated, each party will
return or destroy as much of such written information as the other party may
reasonably request.

 . Shareholders shall furnish to the Buyer the most current on file Forms W-4 and
W-5 of each new employee as of the Closing Date. Shareholders shall send to the
appropriate Social Security Administration office a duly completed Form W-3 and
accompanying copies of the duly completed Form W-2. It is the intent of the
parties that the obligations of Buyer and Shareholders under this Section 13.4
shall be carried out in accordance with Section 5 of the Internal Revenue
Service's Revenue Procedure 96-60.

 . All notices, consents, waivers, and other communications under this Agreement
must be in writing and will be deemed to have been duly given when (a) delivered
by hand (with written confirmation of receipt), (b) sent by telecopier (with
written confirmation of receipt), provided that a copy is mailed by registered
mail, return receipt requested, or (c) when received by the addressee, if sent
by a nationally recognized overnight delivery service (receipt requested), in
each case to the appropriate addresses and telecopier numbers set forth below
(or to such other addresses and telecopier numbers as a party may designate by
notice to the other parties):

               The Company and Shareholders:
               STM Wireless, Inc.
               One Mauchly
               Irvine, California 92618-2305
               Attention:           Jacques Youssefmir, Esq.
               Facsimile No.:       (714) 753-1122

               with a copy to:      Stradling Yocca Carlson & Rauth
                                    660 Newport Center Drive
                                    Suite 1600
                                    Newport Beach, California 92660-6441
               Attention:           K. C. Schaaf, Esq.
               Facsimile No.:       (714) 725-4100

               and with a copy to:  Arter & Hadden LLP
                                    700 South Flower Street, 30th Floor
                                    Los Angeles, California 90017-4101
               Attention:           Jack Goldman, Esq.
               Facsimile No.:       (213) 617-9255

<PAGE>   50

               Buyer:               Inter-Tel, Incorporated
                                    120 N. 44th Street, Suite 200
                                    Phoenix, Arizona 85034-1822
               Attention:           John Gardner, Esq.
               Facsimile No.:       (602) 302-8990

               with a copy to:      Wilson Sonsini Goodrich & Rosati, P.C.
                                    650 Page Mill Road
                                    Palo Alto, California 94304
               Attention:           Jeffrey D. Saper, Esq.
                                    Patrick J. Schultheis, Esq.
               Facsimile No.:       (650) 493-6811

 . Any dispute or disagreement arising between any of the parties hereto shall be
resolved according to the following dispute resolution procedure. First, such
dispute shall be addressed to each party's designated officers for discussion
and attempted resolution. If any such dispute cannot be mutually resolved by
such officers within five (5) business days, then such dispute shall be
immediately referred to the president of each party for discussion and attempted
resolution. If such dispute cannot be mutually resolved by such parties'
representatives within fifteen (15) days (or such longer period as may be
mutually agreed upon), then such dispute or disagreement shall be referred to
arbitration in Los Angeles, California, in accordance with arbitration rules
(the "Arbitration Rules") of the American Arbitration Association ("AAA") in
effect on the date such notice is given, except that such arbitration shall be
before one arbitrator, which arbitrator shall be mutually agreed upon by the
parties, or if the parties fail to agree, shall be appointed by the AAA in
accordance with the Arbitration Rules. Once appointed, the arbitrator shall
appoint a time and place for a prehearing status conference not more than
fifteen (15) days from the date of his or her appointment, and shall appoint a
time and place for a final hearing not more than forty-five (45) days from the
date of the status conference. The final hearing shall conclude no later than
thirty (30) days after its commencement. The decision of the arbitrator shall be
binding upon each party. The arbitrator shall render a written decision stating
with reasonable detail the reasons for the award adopted. The arbitrator may
base his decision on evidence provided by the parties and, in addition, upon
evidence which the parties provide at the request of the arbitrator. Any cash
component of the adopted award shall be payable in the United States dollars
through a bank in the United States. Each party shall bear its own cost of
preparing for and presenting its case; and the cost of arbitration, including
the fees, and expenses of the arbitrator, will be shared equally by the parties
to such arbitration. The arbitration award shall be final and binding upon the
parties and may be confirmed by the judgment of any court having appropriate
jurisdiction including without limitation California.

 . The parties agree (a) to furnish upon request to each other such further
information, (b) to execute and deliver to each other such other documents, and
(c) to do such other acts and things, all as the other party may reasonably
request for the purpose of carrying out the intent of this Agreement and the
documents referred to in this Agreement.

 . The rights and remedies of the parties to this Agreement are cumulative and
not alternative. Neither the failure nor any delay by any party in exercising
any right, power, or privilege under this Agreement or the documents referred to
in this Agreement will operate as a waiver of such right, 

<PAGE>   51

power, or privilege, and no single or partial exercise of any such right, power,
or privilege will preclude any other or further exercise of such right, power,
or privilege or the exercise of any other right, power, or privilege. To the
maximum extent permitted by applicable law, (a) no claim or right arising out of
this Agreement or the documents referred to in this Agreement can be discharged
by one party, in whole or in part, by a waiver or renunciation of the claim or
right unless in writing signed by the other party; (b) no waiver that may be
given by a party will be applicable except in the specific instance for which it
is given; and (c) no notice to or demand on one party will be deemed to be a
waiver of any obligation of such party or of the right of the party giving such
notice or demand to take further action without notice or demand as provided in
this Agreement or the documents referred to in this Agreement.

 . This Agreement supersedes all prior agreements between the parties with
respect to its subject matter and constitutes (along with the documents referred
to in this Agreement) a complete and exclusive statement of the terms of the
agreement between the parties with respect to its subject matter. This Agreement
may not be amended except by a written agreement executed by the party to be
charged with the amendment. No party may rely upon any statement or
representation made by any other party relating to this Agreement unless stated
or represented herein.

 . The disclosures in the Disclosure Letter, and those in any Supplement thereto,
must relate only to the representations and warranties in the Section of the
Agreement to which they expressly relate and not to any other representation or
warranty in this Agreement.

 . No party may assign any of its rights under this Agreement without the prior
consent of the other parties except that Buyer may assign any of its rights
under this Agreement to any wholly-owned Subsidiary of Buyer. Subject to the
preceding sentence, this Agreement will apply to, be binding in all respects
upon, and inure to the benefit of the successors and permitted assigns of the
parties. Nothing expressed or referred to in this Agreement will be construed to
give any Person other than the parties to this Agreement any legal or equitable
right, remedy, or claim under or with respect to this Agreement or any provision
of this Agreement. This Agreement and all of its provisions and conditions are
for the sole and exclusive benefit of the parties to this Agreement and their
successors and assigns.

 . If any provision of this Agreement is held invalid or unenforceable by any
court of competent jurisdiction, the other provisions of this Agreement will
remain in full force and effect. Any provision of this Agreement held invalid or
unenforceable only in part or degree will remain in full force and effect to the
extent not held invalid or unenforceable. . The headings of Sections in this
Agreement are provided for convenience only and will not affect its construction
or interpretation. All references to "Section" or "Sections" refer to the
corresponding Section or Sections of this Agreement. All words used in this
Agreement will be construed to be of such gender or number as the circumstances
require. Unless otherwise expressly provided, the word "including" does not
limit the preceding words or terms.

 . With regard to all dates and time periods set forth or referred to in this
Agreement, time is of the essence.

<PAGE>   52

 . After the Closing Date, neither the Company nor Shareholders nor any of its or
their affiliates shall do business as, or use in the conduct of their businesses
or otherwise the name, Telecom Multimedia Systems, Inc., TMSI or any similar
words.

 . This Agreement will be governed by the laws of the State of California without
regard to conflicts of laws principles.

 . This Agreement may be executed in one or more counterparts, each of which will
be deemed to be an original copy of this Agreement and all of which, when taken
together, will be deemed to constitute one and the same agreement.


                                     * * *


        IN WITNESS WHEREOF, the parties have executed and delivered this
Agreement as of the date first written above.

INTER-TEL, INCORPORATED                     TELECOM MULTIMEDIA SYSTEMS, INC.


By:                                         By:
      -----------------------------                -----------------------------
Title:                                      Title:
      -----------------------------                -----------------------------

STM WIRELESS, INC.


By:
      -----------------------------                
Title:
      -----------------------------                




Ramin Sadr, an individual

Farshad Meshkinpour, an individual

                  [Signature Page to Asset Purchase Agreement]

<PAGE>   1

                                                                   EXHIBIT 10.30

                                ESCROW AGREEMENT

        This Escrow Agreement (the "Agreement"), dated as of June 18, 1998 (the
"Closing Date"), is entered into by and among Inter-Tel Incorporated, an Arizona
corporation ("Buyer"), STM Wireless, Inc., a Delaware corporation and the sole
shareholder of Telecom Multimedia Systems, Inc., a California corporation
("Company"), Ramin Sadr, an individual resident in California and a former
shareholder of Company ("Sadr"), Farshad Meshkinpour, an individual resident in
California and a former shareholder of Company ("Meshkinpour" and collectively
with Parent and Sadr, "Shareholders") and Bank One, Arizona, NA, as escrow agent
("Escrow Agent").

        This is the Escrow Agreement referred to in Section 2.5(c) of the Asset
Purchase Agreement dated May 10, 1998 (the "Asset Purchase Agreement") by and
among Buyer, Company, and Shareholders. Capitalized terms used but not defined
in this agreement shall have the respective meanings given to them in the Asset
Purchase Agreement.

        The parties, intending to be legally bound, hereby agree as follows:

        1.     Establishment of Escrow Account.

               (a) In accordance with Section 2.5(c) of the Asset Purchase
Agreement, Buyer, in accordance with the Schedule of Shareholder Contributions
to Escrow Account attached hereto as Exhibit A, shall deliver herewith to the
Escrow Agent $2,245,536, by wire transfer of immediately available funds. Such
amount (plus any interest thereon and less any funds disbursed from the Escrow
Account to any Indemnified Person or Shareholder, as the case may be, in
accordance with the terms of this Agreement and the Asset Purchase Agreement) is
herein referred to as the "Escrow Amount." Each Shareholder's Contribution to
the Escrow Account as set forth on Exhibit A hereto (plus any interest thereon
and less any funds disbursed from the Escrow Account to any Indemnified Person
that are attributable to such Shareholder, as the case may be, in accordance
with the terms of this Agreement and the Asset Purchase Agreement) is herein
referred to as such Shareholder's "Escrow Amount," respectively. The Escrow
Amount shall be held by the Escrow Agent in a separate and distinct account (the
"Escrow Account"), in accordance with the terms and conditions hereinafter set
forth. The federal employer identification number for the Escrow Account shall
be _____________ and the address for the Escrow Account shall be Bank One,
Arizona, NA, Corporate Trust Services, AZ1-1128, 201 North Central Avenue, 25th
Floor, Phoenix, Arizona, Attention: Karen L. Robinson.

               (b) Escrow Agent hereby agrees to act as escrow agent and to
hold, safeguard and disburse the Escrow Amount pursuant to the terms and
conditions hereof and shall treat the Escrow Account as a trust fund in
accordance with the terms hereof as the property of Shareholders.

        2.     Disbursement of Escrow Amount.

               (a) Disbursement in Respect of Claims for Damages.

                      i. Claims Notices. At any time and from time to time
        hereafter, if the Escrow Agent, (A) receives a notice from Buyer on
        behalf of an Indemnified Person of any claim for Damages, which notice
        has been executed and simultaneously delivered to Shareholders (in
        accordance with Section 12.8 of the Asset Purchase Agreement) and the
        Escrow Agent by Buyer, specifies in reasonable detail the nature and
        basis of the claim for 

<PAGE>   2

        Damages and is substantially in the form attached hereto as Exhibit B (a
        "Claims Notice"), and (B) does not receive a notice of objection to such
        claim for Damages from Shareholders (an "Objection Notice") within
        thirty (30) days of receipt of such Claims Notice (the "Objection
        Period"), then the Escrow Agent shall, within two (2) business days
        following the expiration of the Objection Period (or such later period
        as directed in the Claims Notice), transfer from the Escrow Account to
        the appropriate Indemnified Person as directed by Buyer in such Claims
        Notice, in immediately available funds, the amount or amounts specified
        in such Claims Notice. If the Escrow Agent receives an Objection Notice,
        then the Escrow Agent shall not transfer any money with respect to such
        Claims Notice unless and until it receives a Final Judgment Notice or
        Mutual Consent Notice (each as defined below) in connection therewith.

                      ii. Final Judgment Notices. At any time and from time to
        time hereafter, if the Escrow Agent receives a notice from Buyer on
        behalf of an Indemnified Person of any claim for Damages in an amount
        that has been ordered as a binding arbitration award or a final judgment
        by a court or regulatory authority of competent jurisdiction (a "Final
        Judgment Order"), which notice has been executed and simultaneously
        delivered to Shareholders and the Escrow Agent by Buyer and is
        substantially in the form attached hereto as Exhibit C (the "Final
        Judgment Notice"), then the Escrow Agent shall, within two (2) business
        days after receipt of such Final Judgment Notice (or such later period
        as directed in the Final Judgment Notice), transfer from the Escrow
        Account to the appropriate Indemnified Person as directed by Buyer in
        such Final Judgment Notice, in immediately available funds, the amount
        or amounts specified in the Final Judgment Order and the Final Judgment
        Notice.

                      iii. Mutual Consent Notices. At any time and from time to
        time hereafter, if the Escrow Agent receives a notice from Buyer and
        Shareholders, which notice has been executed and delivered by Buyer and
        Shareholders and is substantially in the form attached hereto as Exhibit
        D (the "Mutual Consent Notice"), of any claim for Damages by an
        Indemnified Person in an amount which has been agreed upon by Buyer and
        Shareholders in satisfaction of such claim for Damages, then the Escrow
        Agent shall, within two (2) business days after the receipt of such
        Mutual Consent Notice (or such later period as directed in the Mutual
        Consent Notice), transfer from the Escrow Account to the appropriate
        Indemnified Person as directed in such Mutual Consent Notice, in
        immediately available funds, the amount or amounts specified in the
        Mutual Consent Notice.

               (b)    Disbursements of Escrow Amount to Shareholders.

                      i. Within three (3) business days of the date that is one
        year after the Closing (the "First Anniversary"), the Escrow Agent shall
        transfer to Parent, in immediately available funds, Parent's Escrow
        Amount, less:

                             (A) any amounts set forth in any Claims Notices (1)
               for which the Objection Period has not yet run or (2) the subject
               of which has not been resolved pursuant to a Final Judgment Order
               or otherwise mutually agreed to by Buyer and Shareholders as
               evidenced by a Mutual Consent Notice; and

                             (B) any amounts payable but not theretofore paid
               pursuant to any Claims Notice, Final Judgment Order or Mutual
               Consent Notice.

<PAGE>   3

                      ii. All amounts remaining in the Escrow Account after
        distribution pursuant to clause (i) above shall continue to be held by
        the Escrow Agent pursuant to the terms of this Agreement pending final
        resolution of such Claims Notices. In the event there is a Final
        Judgment Order or Mutual Consent Notice subsequent to the First
        Anniversary with respect to a Claim Notice, the Escrow Agent shall
        immediately transfer to Parent, in immediately available funds, the
        positive difference, if any, between the amount resolved or set forth in
        the Final Judgment Order or Mutual Consent Notice and the amount
        originally set forth in such Claim Notice; provided, however, that in no
        event shall such release cause the Escrow Account to be reduced below
        the amount that would have been in the Escrow Account following
        distribution to Parent upon the First Anniversary Date pursuant to
        Section 2(b)(i) assuming that the Claim which was the subject of such
        Final Judgment Order or Mutual Consent Notice did not exist.

                      iii. Within three (3) business days of the date that is
        two (2) years after the Closing (the "Second Anniversary"), the Escrow
        Agent shall transfer to Sadr and Meshkinpour, respectively, in
        immediately available funds, their respective Escrow Amounts less the
        sum of:

                             (A) any amounts set forth in any Claims Notices (1)
               for which the Objection Period has not yet run or (2) the subject
               of which has not been resolved pursuant to a Final Judgment Order
               or otherwise mutually agreed to by Buyer and Shareholders as
               evidenced by a Mutual Consent Notice; and

                             (B) any amounts payable but not theretofore paid
               pursuant to any Claims Notice, Final Judgment Order or Mutual
               Consent Notice;

                      iv. All amounts remaining in the Escrow Account after
        distribution pursuant to clause (iii) above shall continue to be held by
        the Escrow Agent pursuant to the terms of this Agreement pending final
        resolution of such Claims Notices. In the event that there is a Final
        Judgment Order or Mutual Consent Notice subsequent to with respect to a
        Claim Notice, the Escrow Agent shall immediately transfer to Sadr and
        Meshkinpour, respectively, in immediately available funds, their
        respective portion of the positive difference, if any, between the
        amount resolved or set forth in the Final Judgment Order or Mutual
        Consent Notice and the amount originally set forth in such Claim Notice;
        provided, however, that in no event shall such release cause the Escrow
        Account to be reduced below the amount that would have been in the
        Escrow Account as of the Second Anniversary assuming that the Claim
        which was the subject of such Final Judgment Order or Mutual Consent
        Notice did not exist.

                      v. Notwithstanding anything in this Section 2(b) to the
        contrary: (i) in the event that Sadr ceases to remain in the continuous
        employment of Buyer or an Acquired Company, as applicable, at any time
        prior to the Second Anniversary for any reason (unless Sadr is
        terminated without Cause (as defined in Sadr's Employment Agreement with
        Buyer)), the Escrow Agent shall transfer to Buyer, in immediately
        available funds, Sadr's Escrow Amount; (ii) in the event that
        Meshkinpour ceases to remain in the continuous employment of Buyer or an
        Acquired Company, as applicable, at any time prior to the Second
        Anniversary for any reason (unless Meshkinpour is terminated without
        Cause (as defined in Meshkinpour's Employment Agreement with Buyer)),
        the Escrow Agent shall transfer to Buyer, in immediately available
        funds, Meshkinpour's Escrow Amount; and (iii) in the event that both of
        Sadr and Meshkinpour cease to remain in the continuous employment of
        Buyer or an Acquired Company, as applicable, at any time prior to the
        Second Anniversary for any reason (unless Sadr and Meshkinpour are
        terminated without Cause (as defined 

<PAGE>   4

        in their Employment Agreements with Buyer)), the Escrow Agent shall
        transfer to Buyer, in immediately available funds, the sum of Sadr's
        Escrow Amount and Meshkinpour's Escrow Amount.

        3. Termination. This Escrow Agreement shall automatically terminate on
the date on which all amounts in the Escrow Account have been distributed
pursuant to Section 2 hereof; however, the Escrow Agent's rights to indemnity
and to receive payments in respect of any fees and expenses incurred by such
Escrow Agent in connection with its duties hereunder shall survive any
termination of this Escrow Agreement.

        4. Resolution of Conflicts; Arbitration.

               (a) In case Shareholders shall so object in writing to any claim
or claims made in any Claims Notice, Shareholders and Buyer shall attempt in
good faith to agree upon the rights of the respec-tive parties with respect to
each of such claims. If Shareholders and Buyer should so agree, a Mutual Consent
Notice setting forth such agreement shall be prepared and signed by all parties
and shall be furnished to Escrow Agent. Escrow Agent shall be entitled to rely
on any such memorandum and distribute cash from the Escrow Account in accordance
with the terms thereof.

               (b) If no such agreement can be reached after good faith
negotiation, either Buyer or Shareholders may demand arbitration of the matter
unless the amount of the damage or loss is at issue in pending litigation with a
third party, in which event arbitration shall not be commenced until such amount
is ascertained or both parties agree to arbitration; and in either such event
the matter shall be settled by arbitration conducted by three arbitrators. Buyer
shall select one arbitrator and Shareholders shall select one arbitrator, and
the two arbitrators so selected shall select a third arbitrator, each of which
arbitrators shall be independent and have at least five (5) years relevant
experience. The arbitrators shall set a limited time period and establish
procedures designed to reduce the cost and time for discovery while allowing the
parties an opportunity, adequate in the sole judgment of the arbitrators, to
discover relevant information from the opposing parties about the subject matter
of the dispute. The arbitrators shall rule upon motions to compel or limit
discovery and shall have the authority to impose sanctions, including attorneys
fees and costs, to the extent as a court of competent law or equity, should the
arbitrators determine that discovery was sought without substantial
justification or that discovery was refused or objected to without substantial
justification. The decision of a majority of the three arbitrators as to the
validity and amount of any claim in such Claims Notice shall be binding and
conclusive upon the parties to this Agreement, and notwithstanding anything in
Section 2 hereof, Escrow Agent shall be entitled to act in accordance with such
decision and make or withhold payments out of the Escrow Account in accordance
therewith. Such decision shall be written and shall be supported by written
findings of fact and conclusions which shall set forth the award, judgment,
decree or order awarded by the arbitrators.

               (c) Judgment upon any award rendered by the arbitrators may be
entered in any court having jurisdiction. Any such arbitration shall be held in
Phoenix, Arizona under the rules then in effect of the American Arbitration
Association. For purposes of this Section 4, in any arbitra-tion hereunder in
which any claim or the amount thereof stated in the Claims Notice is at issue,
Buyer shall be deemed to be the Non-Prevailing Party in the event that the
arbitrators award Buyer less than the sum of one-half (1/2) of the disputed
amount (which disputed amount shall include only that amount of a claim made in
a Claims Notice that Shareholders specifically object to in writing pursuant to
Section 2); otherwise, Shareholders shall be deemed to be the Non-Prevailing
Party. The Non-Prevailing Party to an arbitration shall pay the fees of each
arbitrator and the administrative costs of the arbitration, but each party shall
otherwise be responsible for its own 

<PAGE>   5

expenses, including without limitation, reasonable attorneys' fees and costs,
incurred in connection with the arbitration.

     5. Duties of Escrow Agent.

               (a) Escrow Agent shall be obligated only for the performance of
such duties as are specifically set forth herein, and as set forth in any
additional written escrow instructions which Escrow Agent may receive after the
date of this Agreement which are signed by Buyer and Shareholders, and may rely
and shall be protected in relying or refraining from acting on any instru-ment
reasonably believed to be genuine and to have been signed or presented by the
proper party or parties.

               (b) Escrow Agent shall not be liable, except for its own gross
negligence or willful misconduct and, except with respect to claims based upon
such gross negligence or willful misconduct that are successfully asserted
against Escrow Agent, the other parties hereto shall jointly and severally
indemnify and hold harmless Escrow Agent (and any successor Escrow Agent) from
and against any and all losses, liabilities, claims, actions, damages and
expenses, including reasonable attorneys' fees and disbursements, arising out of
and in connection with this Agreement.

               (c) Escrow Agent shall be entitled to rely upon any order,
judgment, certification, demand, notice, instrument or other writing delivered
to it hereunder without being required to determine the authenticity or the
correctness of any fact stated therein or the propriety or validity of the
service thereof. Escrow Agent may act in reliance upon any instrument or
signature believed by it to be genuine and may assume that the person purporting
to give receipt or advice or make any statement or execute any document in
connection with the provisions hereof has been duly authorized to do so. Escrow
Agent may conclusively presume that the undersigned representative of any party
hereto which is an entity other than a natural person has full power and
authority to instruct Escrow Agent on behalf of that party unless written notice
to the contrary is delivered to Escrow Agent.

               (d) Escrow Agent may act pursuant to the advice of counsel with
respect to any matter relating to this Agreement and shall not be liable for any
action taken or omitted by it in good faith in accordance with such advice.

               (e) Escrow Agent makes no representation as to the validity,
value, genuineness or the collectability of any security or other document or
instrument held by or delivered to it.

               (f) Escrow Agent shall not be called upon to advise any party as
to the wisdom in selling or retaining or taking or refraining from any action
with respect to any securities or other property deposited hereunder.

               (g) Escrow Agent (and any successor Escrow Agent) may at any time
resign by giving at least thirty (30) days prior written notice to the parties
and by delivering the Escrow Account to any successor Escrow Agent jointly
designated by the other parties hereto in writing, or to any court of competent
jurisdiction, whereupon Escrow Agent shall be discharged of and from any and all
further obligations arising in connection with this Agreement. If at that time
Escrow Agent has not received a designation of a successor Escrow Agent, Escrow
Agent's sole responsibility after that time shall be to retain and safeguard the
Escrow Account until receipt of a designation of successor Escrow Agent or a
joint written disposition instruction by the other parties hereto or a final
non-appealable 

<PAGE>   6

order of a court of competent jurisdiction. Any corporation into which the
Escrow Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Escrow Agent
shall be a party, or any corporation succeeding to the corporate trust business
of the Escrow Agent shall be the successor Escrow Agent hereunder, without the
execution or filing of any paper or any paper or any further action on the part
of any of the parties hereto.

               (h) In the event of any disagreement between the other parties
hereto resulting in adverse claims or demands being made in connection with the
Escrow Account or in the event that Escrow Agent is in doubt as to what action
it should take hereunder, Escrow Agent shall be entitled to retain the Escrow
Account until Escrow Agent shall have received (i) a final non-appealable order
of a court of competent jurisdiction directing delivery of the Escrow Account or
(ii) a written agreement executed by Buyer and the Shareholders directing
delivery of the Escrow Account, in which event Escrow Agent shall disburse the
Escrow Account in accordance with such order or agreement. Any court order shall
be accompanied by a legal opinion by counsel for the presenting party
satisfactory to Escrow Agent to the effect that the order is final and
non-appealable. Escrow Agent shall act on such court order and legal opinion
without further question.

               (i) Buyer shall pay Escrow Agent compensation (as payment in
full) for the services to be rendered by Escrow Agent hereunder in the amount of
$2,000.00 at the time of execution of this Agreement and $2,000.00 annually
thereafter and agree to reimburse Escrow Agent for all reasonable expenses,
disbursements and advances incurred or made by Escrow Agent in performance of
its duties hereunder (including reasonable fees, expenses and disbursements of
its counsel). Notwithstanding anything in this Agreement to the contrary, the
Escrow Agent shall be entitled to retain from any disbursements requested
hereunder any outstanding fees and/or expenses due to it hereunder. The Escrow
Agent is hereby granted a first lien on the Escrow Amount for all indebtedness
that may become owing to the Escrow Agent pursuant to this Agreement. In the
event such fees and/or expenses are not paid to Escrow Agent within thirty (30)
days after Escrow Agent makes a demand in writing therefor, the Escrow Agent may
charge such fees and/or expenses against the Escrow Amount, either against the
corpus of the Escrow Amount or interest earned thereon.

               (j) No printed or other matter in any language (including,
without limitation, prospectuses, notices, reports and promotional material)
that mentions Escrow Agent's name or the rights, powers, or duties of Escrow
Agent shall be issued by the other parties hereto or on such parties' behalf
unless Escrow Agent shall first have given its specific written consent thereto.

               (k) The Escrow Fund shall be invested by the Escrow Agent (x) in
securities which at the date of such investments are direct obligations of, or
obligations fully guaranteed by, the United States or any agency of the United
States or bank certificates of deposit of a United States bank which is an
affiliate of the Federal Reserve System and has a net worth of at least
$100,000,000, in each case with maturities not in excess of thirty (30) days, or
(y) in such securities as Buyer and the Shareholders shall together designate in
writing to the Escrow Agent. Any interest received with respect to such
investments of the Escrow Fund shall be added to and shall constitute part of
the Escrow Fund and shall be reported by the Shareholders for income tax
purposes. The Escrow Agent shall have the right to sell securities in order to
make payments (and in the case of bank certificates of deposit, such payments
shall be paid upon first maturity of funds) and shall not be liable for any loss
due to fluctuation in market value or penalties due to early redemption.

<PAGE>   7

     6. Limited Responsibility. This Agreement expressly sets forth all the
duties of Escrow Agent with respect to any and all matters pertinent hereto. No
implied duties or obligations shall be read into this agreement against Escrow
Agent. Escrow Agent shall not be bound by the provisions of any agreement among
the other parties hereto except this Agreement.

     7. Ownership for Tax Purposes. Shareholders agree that, for purposes of
federal and other taxes based on income, Shareholders will be treated as the
owner of the Escrow Account, and that Shareholders will report all income, if
any, that is earned on, or derived from, the Escrow Account as its income, in
the taxable year or years in which such income is properly includible and pay
any taxes attributable thereto.

     8. Notices. All notices, consents, waivers and other communications under
this Agreement must be in writing and will be deemed to have been duly given
when (a) delivered by hand (with written confirmation of receipt), (b) sent by
telecopier (with written confirmation of receipt) provided that a copy is mailed
by registered mail, return receipt requested, or (c) when received by the
addressee, if sent by a nationally recognized overnight delivery service
(receipt requested), in each case to the appropriate addresses and telecopier
numbers set forth below (or to such other addresses and telecopier numbers as a
party may designate by notice to the other parties):

        The Company and Shareholders:
        STM Wireless, Inc.
        One Mauchly
        Irvine, California 92618-2305
               Attention:           Jacques Youssefmir, Esq.
               Facsimile No.:       (714) 753-1122

               with a copy to:      Stradling Yocca Carlson & Rauth
                                    660 Newport Center Drive
                                    Suite 1600
                                    Newport Beach, California 92660-6441
               Attention:           K. C. Schaaf, Esq.
               Facsimile No.:       (714) 725-4100

               and with a copy to:  Arter & Hadden LLP
                                    700 South Flower Street, 30th Floor
                                    Los Angeles, California 90017-4101
               Attention:           Jack Goldman, Esq.
               Facsimile No.:       (213) 617-9255

               Buyer:               Inter-Tel, Incorporated
                                    120 N. 44th Street, Suite 200
                                    Phoenix, Arizona 85034-1822
               Attention:           John Gardner, Esq.
               Facsimile No.:       (602) 302-8990

               with a copy to:      Wilson Sonsini Goodrich & Rosati, P.C.
                                    650 Page Mill Road
                                    Palo Alto, California 94304
               Attention:           Jeffrey D. Saper, Esq.
                                    Patrick J. Schultheis, Esq.
               Facsimile No.:       (650) 493-6811

<PAGE>   8

               Escrow Agent:        Bank One, Arizona, NA
                                    Corporate Trust Services, AZ1-1128
                                    201 North Central Avenue, 25th Floor
                                    Phoenix, AZ 85004
               Attention:           Karen L. Robinson
               Facsimile No.        (602) 221-1711


        9. Consequential Damages. In no event shall the Escrow Agent be liable
for special, indirect or consequential loss or damage of any kind whatsoever
(including, but not limited to lost profits), even if the Escrow Agent has been
advised of the likelihood of such loss or damage and regardless of the form of
action.

        10. Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed to be an original and all of which,
when taken together, will be deemed to constitute one and the same.

 . In the event that any provision of this Agreement or the application thereof,
becomes or is declared by a court of competent jurisdiction to be illegal, void
or unenforce-able, the remainder of this Agreement will continue in full force
and effect and the application of such provision to other persons or
circumstances will be interpreted so as reasonably to effect the intent of the
parties hereto. The parties further agree to replace such void or unenforceable
provision of this Agreement with a valid and enforceable provision that will
achieve, to the extent pos-sible, the economic, business and other purposes of
such void or unenforceable provision.

        12. Section Headings. The headings of sections in this Agreement are
provided for convenience only and will not affect its construction or
interpretation.

        13. Waiver. The rights and remedies of the parties to this Agreement are
cumulative and not alternative. Neither the failure nor any delay by any party
in exercising any right, power, or privilege under this Agreement or the
documents referred to in this Agreement will operate as a waiver of such right,
power, or privilege, and no single or partial exercise of any such right, power,
or privilege will preclude any other or further exercise of such right, power,
or privilege or the exercise of any other right, power, or privilege. To the
maximum extent permitted by applicable law, (a) no claim or right arising out of
this Agreement or the documents referred to in this Agreement can be discharged
by one party, in whole or in part, by a waiver or renunciation of the claim or
right unless in writing signed by the other party; (b) no waiver that may be
given by a party will be applicable except in the specific instance for which it
is given; and (c) no notice to or demand on one party will be deemed to be a
waiver of any obligation of such party or of the right of the party giving such
notice or demand to take further action without notice or demand as provided in
this Agreement or the documents referred to in this Agreement.

        14. Exclusive Agreement and Modification. This Agreement supersedes all
prior agreements among the parties with respect to its subject matter and
constitutes (along with the documents referred to in this Agreement) a complete
and exclusive statement of the terms of the 

<PAGE>   9

agreement between the parties with respect to its subject matter. This Agreement
may not be amended except by a written agreement executed by the Buyer,
Shareholders and Escrow Agent.

        15. Governing Law. This Agreement shall be governed by the laws of the
State of California, without regard to conflicts of law principles.


                  [Remainder of page intentionally left blank]

<PAGE>   10

        IN WITNESS WHEREOF, the parties have executed and delivered this
Agreement as of the date first written above.

INTER-TEL, INCORPORATED                     STM WIRELESS, INC.

By:                                         By:
      -----------------------------                -----------------------------
Title:                                      Title:
      -----------------------------                -----------------------------

Ramin Sadr, an individual

Farshad Meshkinpour, an individual


ESCROW AGENT

By:
      -----------------------------                
Title:
      -----------------------------                






                      [Signature Page to Escrow Agreement]

<PAGE>   11

                                    EXHIBIT A

             SCHEDULE OF SHAREHOLDER CONTRIBUTIONS TO ESCROW ACCOUNT
             -------------------------------------------------------


Parent                                      $1,000,000

Sadr                                          $809,538

Meshkinpour                                   $435,998


<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                           6,776
<SECURITIES>                                     4,509
<RECEIVABLES>                                    9,246
<ALLOWANCES>                                       633
<INVENTORY>                                     12,605
<CURRENT-ASSETS>                                35,865
<PP&E>                                          12,857
<DEPRECIATION>                                   4,346
<TOTAL-ASSETS>                                  47,529
<CURRENT-LIABILITIES>                           12,938
<BONDS>                                          4,702
                                0
                                          0
<COMMON>                                        33,629
<OTHER-SE>                                      (4,054)
<TOTAL-LIABILITY-AND-EQUITY>                    47,529
<SALES>                                         15,938
<TOTAL-REVENUES>                                16,242
<CGS>                                           11,449
<TOTAL-COSTS>                                   11,728
<OTHER-EXPENSES>                                 3,700
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 249
<INCOME-PRETAX>                                    789
<INCOME-TAX>                                       108
<INCOME-CONTINUING>                                726
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       726
<EPS-PRIMARY>                                     0.11
<EPS-DILUTED>                                     0.11
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          19,367
<SECURITIES>                                     2,227
<RECEIVABLES>                                   16,415
<ALLOWANCES>                                       864
<INVENTORY>                                     14,970
<CURRENT-ASSETS>                                55,839
<PP&E>                                          22,605
<DEPRECIATION>                                   6,210
<TOTAL-ASSETS>                                  76,976
<CURRENT-LIABILITIES>                           35,161
<BONDS>                                          4,451
                                0
                                          0
<COMMON>                                        38,163
<OTHER-SE>                                      (6,854)
<TOTAL-LIABILITY-AND-EQUITY>                    76,976
<SALES>                                          8,633
<TOTAL-REVENUES>                                 9,108
<CGS>                                            6,281
<TOTAL-COSTS>                                    6,967
<OTHER-EXPENSES>                                (2,903)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 326
<INCOME-PRETAX>                                  4,901
<INCOME-TAX>                                       244
<INCOME-CONTINUING>                              4,434
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     4,434
<EPS-PRIMARY>                                     0.63
<EPS-DILUTED>                                     0.60
        

</TABLE>


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