TEKELEC
8-K, 1999-05-14
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


          Date of Report (Date of Earliest Event Reported): May 7, 1999


                                     TEKELEC
              ----------------------------------------------------
             (Exact Name of Registrant as Specified in its Charter)


                                   California
                  --------------------------------------------
                 (State or Other Jurisdiction of Incorporation)


       000-15135                                      95-2746131
 ----------------------                   -------------------------------------
(Commission File Number)                 (I.R.S. Employer Identification Number)


                   26580 West Agoura Road, Calabasas, CA 91302
                   -------------------------------------------
                    (Address of Principal Executive Offices)


                                 (818) 880-5656
               --------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


<PAGE>   2

                                     TEKELEC
                                    FORM 8-K
                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                         PAGE
                                                                                         ----
<S>                                                                                      <C>
ITEM 2:        Acquisition or Disposition of Assets....................................    3

ITEM 7:        Financial Statements and Exhibits.......................................    5

SIGNATURES
</TABLE>

                                       2
<PAGE>   3

ITEM 2: ACQUISITION OR DISPOSITION OF ASSETS

IEX Corporation Acquisition

     On May 7, 1999, Tekelec, a California corporation, acquired all the stock
of privately held IEX Corporation, a Nevada corporation ("IEX") in exchange for
cash and, for certain IEX stockholders, secured promissory notes ("Notes"). The
acquisition was effected through a statutory merger (the "Merger") in which
Eagle Lonestar Corporation, a Delaware corporation and a wholly-owned subsidiary
of Tekelec ("Sub"), was merged into IEX, with IEX surviving the Merger. As a
result of the Merger, IEX became a wholly-owned subsidiary of Tekelec. The
Merger was approved by Tekelec's Board of Directors at a special meeting held on
April 18, 1999.

     The Merger was consummated pursuant to an Agreement and Plan of
Reorganization dated as of April 20, 1999 (the "Plan") entered into by Tekelec,
Sub, IEX and IEX Partners, Teknekron Partners II, Gary Crockett and Stephen Lynn
(IEX Partners, Teknekron Partners II and Messrs. Crocket and Lynn were
affiliates and principal stockholders of IEX prior to the Merger). The executive
officers of IEX were not changed as a result of the Merger, except that Stephen
Lynn resigned as Executive Vice President and Chief Operating Officer of IEX in
connection with the Merger.

     IEX develops products and creates solutions for telecommunications
carriers, call centers and private networks. IEX's revenues are derived
primarily from two divisions: Intelligent Network Products and Call Center
Products. Intelligent network products, including the Da Vinci(TM) Service
Control Point, Service Node, VoX Call Server and Network Switch, enable
telecommunications carriers to provide enhanced network services such as caller
ID, 800 number calling and prepaid telephony. IEX's call center products include
TotalView(TM), a workforce management solution, and TotalNet(TM), a call routing
solution. IEX customers include telecommunications product manufacturers,
competitive local exchange carriers, interexchange carriers, and organizations
in various industries with significant call center operations.

     Under the terms of the Plan, the shares of IEX common stock that were
outstanding prior to the Merger were converted into the right to receive (a) for
each share of IEX common stock owned by an IEX stockholder who was not a
Significant Stockholder (as defined below), cash in the amount of $8.28, and (b)
for each share of IEX common stock owned by an IEX stockholder owning or having
the right to purchase at least 150,000 shares of IEX common stock (a
"Significant Stockholder"), $2.52 in cash and $5.76 payable by Note, in each
case subject to certain deductions disclosed and agreed to by IEX stockholders.
To the extent that any options to purchase IEX common stock were outstanding
immediately prior to the Merger, the holder thereof was entitled to receive per
share consideration in the same amounts, subject to reduction for the exercise
price and applicable tax withholding liabilities. The aggregate consideration
payable by Tekelec to IEX stock and option holders under the Plan was
$163,000,000, comprised of $63,000,000 in cash and $100,000,000 aggregate
principal amount of Notes issued to the Significant Stockholders by Tekelec and
IEX, as the surviving corporation in the Merger, subject to certain deductions
with respect to amounts payable by the stock or option holders to IEX of

                                       3
<PAGE>   4

approximately $2,682,000 in the aggregate. Such consideration was negotiated and
determined on the basis of (a) negotiations with IEX and (b) the value of IEX,
as determined by Tekelec's management following its review and analysis of IEX's
business and financial position and its discussions with Tekelec's advisors and
IEX's management and advisors.

     The sources of funds used by Tekelec to purchase IEX common stock and
options under the Plan were existing cash reserves and cash equivalents of
Tekelec. Tekelec has not obtained any bank loans as of the date hereof in
connection with the Merger, and it currently expects to refinance the
indebtedness under the Notes subject to market conditions and other factors.

     The Notes issued to the Significant Stockholders are dated as of May 7,
1999 and will bear interest at an initial rate of 7%, compounded quarterly, with
an initial maturity date of November 7, 1999; provided, however, the maturity
date may be extended by Tekelec and IEX for four additional periods of three
months each if Tekelec or IEX pays a minimum of $20,000,000 of aggregate
principal on the Notes prior to each extension. Immediately following the
initial maturity date, the interest rate will increase to 12% per annum, which
rate will thereafter increase by 2% during each subsequent three month
extension. The Notes are subordinated to certain senior indebtedness of Tekelec,
which subordination will not exceed an amount equal to $150,000,000, less the
then outstanding principal amount of the Notes. The Notes are secured by all of
the common stock of IEX and all of the IEX assets. In the event of default, the
Significant Stockholders will have the right to exercise such rights and
remedies as are described in the Note and Security Agreement dated as of May 7,
1999 between Tekelec, IEX and the Significant Stockholders (the "Note
Agreement") that governs the Notes.

     Pursuant to the terms of the Plan, Tekelec, certain representatives of the
Significant Stockholders of IEX and an escrow agent entered into an Escrow
Agreement, under which 10% of the gross consideration payable to each
Significant Stockholder (approximately $14,388,056 for all Significant
Stockholders) in the Merger has been placed in an escrow account in the form of
Notes to secure and collateralize certain indemnification obligations of the
Significant Stockholders to Tekelec.

     Contemporaneously with the Merger, (a) certain employees of IEX entered
into Employment Agreements with IEX, as the surviving corporation in the Merger,
providing for, among other things, certain terms of employment at a specified
minimum salary, (b) each of the Significant Stockholders and Harvey Wagner (an
affiliate of IEX Partners and Teknekron Partners II) entered into a
Non-Competition Agreement with Tekelec and IEX providing, among other things,
that such person will not engage in certain activities competitive with IEX's
business for a period of up to three years; and (c) Tekelec, IEX and the
Significant Stockholders entered into the Note Agreement governing the Notes.

                                       4
<PAGE>   5

<TABLE>
<CAPTION>
ITEM 7:  FINANCIAL STATEMENTS AND EXHIBITS.

(a)  Financial Statements of IEX Corporation.

     <S>  <C>                                                                                <C>
     o    Report of Independent Auditors...................................................   7
     o    Balance Sheets as of December 31, 1998 and 1997..................................   8
     o    Statements of Income for each of the three years in the period ended
          December 31, 1998................................................................   9
     o    Statements of Changes in Shareholders' Equity for each of the three
          years in the period ended December 31, 1998......................................  10
     o    Statements of Cash Flows for each of the three years in the period
          ended December 31, 1998..........................................................  11
     o    Notes to Financial Statements....................................................  12

(b)  Unaudited Pro forma Condensed Financial Information.
     o    Unaudited Pro forma Condensed Combining Statements of Operations.................  28
     o    Unaudited Pro forma Condensed Combining Balance Sheets...........................  29
     o    Notes to Unaudited Pro forma Condensed Combining Financial Information...........  30
</TABLE>

(c)  Exhibits.

     The following exhibits are filed herewith:

     2.01 Agreement and Plan of Reorganization dated as of April 20, 1999
          by and among Tekelec, Eagle Lonestar Corporation, IEX
          Corporation, IEX Partners, Teknekron Partners II, Gary Crockett
          and Stephen Lynn. (Pursuant to Item 601(b)(2) of Regulation S-K,
          certain exhibits and schedules have been omitted but will be
          furnished supplementally to the Commission upon request).

     4.01 Note and Security Agreement dated as of May 7, 1999 by and among
          Tekelec, IEX Corporation and the Significant Stockholders of IEX
          Corporation.

     4.02 Secured Promissory Notes dated as of May 7, 1999 made by Tekelec
          and IEX Corporation in favor of each of the Significant
          Stockholders of IEX Corporation.

     23.1 Consent of Ernst & Young LLP

                                       5
<PAGE>   6

                                   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 hereunto duly authorized.

Date:  May 14, 1999

                                         TEKELEC


                                         By: /s/ Michael L. Margolis
                                             -----------------------------------
                                             President and Chief Executive 
                                             Officer

                                       6
<PAGE>   7


                         Report of Independent Auditors

Board of Directors and Shareholders
IEX Corporation

We have audited the accompanying balance sheets of IEX Corporation as of
December 31, 1998 and 1997, and the related statements of income, changes in
shareholders' equity, and cash flows for each of the three years in the period
ended December 31, 1998. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

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

In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of IEX Corporation at December 31,
1998 and 1997, and the results of its operations and its cash flows for each of
the three years in the period ended December 31, 1998 in conformity with
generally accepted accounting principles.

                                                           /s/ ERNST & YOUNG LLP


Dallas, Texas
February 23, 1999


                                       7

<PAGE>   8


                                 IEX Corporation

                                 Balance Sheets

<TABLE>
<CAPTION>
                                                                              DECEMBER 31,
                                                                      1998                  1997
                                                                  ----------------------------------
                                                                         (In thousands, except
                                                                             share amounts)
<S>                                                               <C>                   <C>         
ASSETS
Current assets:
  Cash and cash equivalents                                       $      6,977          $      6,403
  Receivables (net of allowance for doubtful accounts of
    $505,000 in 1998 and $724,000 in 1997)                              14,887                18,279
  Inventory                                                              4,619                 2,345
  Marketable securities                                                  7,173                 1,620
  Deferred income taxes                                                  1,161                 1,157
  Prepaid expenses and other current assets                                517                   483
                                                                  ------------          ------------
Total current assets                                                    35,334                30,287

Property and equipment, net                                              3,505                 3,266

Marketable securities                                                    3,192                 2,325
Deferred income taxes                                                      169                   158
                                                                  ------------          ------------
Total assets                                                      $     42,200          $     36,036
                                                                  ============          ============

LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                                $      2,737          $      1,566
  Accrued salaries and benefits                                          5,130                 3,774
  Other accrued liabilities                                                347                   946
  Deferred revenue                                                      11,821                10,965
  Income taxes payable                                                     786                 1,097
                                                                  ------------          ------------
Total current liabilities                                               20,821                18,348

Commitments and contingencies

Shareholders' equity:
  Common stock, $.01 par value:
    Authorized shares - 20,000,000
    Issued and outstanding shares - 17,061,065
      in 1998 and 16,520,015 in 1997                                       171                   165
  Additional paid-in capital                                             1,452                   479
  Receivables from employee stock purchases                               (668)                   --
  Unearned compensation                                                   (114)                   --
  Retained earnings                                                     20,538                17,044
                                                                  ------------          ------------
Total shareholders' equity                                              21,379                17,688
                                                                  ------------          ------------
Total liabilities and shareholders' equity                        $     42,200          $     36,036
                                                                  ============          ============
</TABLE>

See accompanying notes.



                                       8
<PAGE>   9


                                 IEX Corporation

                              Statements of Income


<TABLE>
<CAPTION>
                                                       YEAR ENDED DECEMBER 31,
                                                 1998             1997              1996
                                               -------------------------------------------
                                                             (In thousands)
<S>                                            <C>              <C>               <C>     
Revenue:
  Products and software license fees           $ 31,051         $ 24,829          $ 12,741
  Customer support and other services            18,230           18,078            16,408
                                               --------         --------          --------
     Total revenue                               49,281           42,907            29,149
Cost of revenue:
  Products and software license fees              8,183            5,956             2,840
  Customer support and other services            10,872           10,916            10,799
                                               --------         --------          --------
     Total cost of revenue                       19,055           16,872            13,639
                                               --------         --------          --------
Gross margin                                     30,226           26,035            15,510

Operating expenses:
  Product development and enhancements            6,852            4,630             3,820
  Marketing and selling                           6,293            4,390             2,188
  General and administrative                     12,270           10,310             6,037
                                               --------         --------          --------
                                                 25,415           19,330            12,045
                                               --------         --------          --------

Operating income                                  4,811            6,705             3,465

Interest income                                     477              440               336
Other income (expense)                               35             (956)              210
                                               --------         --------          --------
Income before taxes                               5,323            6,189             4,011
Income tax provision                              1,829            2,078             1,233
                                               --------         --------          --------
Net income                                     $  3,494         $  4,111          $  2,778
                                               ========         ========          ========
</TABLE>


See accompanying notes.



                                       9
<PAGE>   10



                                 IEX Corporation

                  Statements of Changes in Shareholders' Equity


<TABLE>
<CAPTION>
                                      COMMON STOCK
                                -------------------------
                                                                          RECEIVABLES
                                                                           EMPLOYEE
                                                            ADDITIONAL       FROM
                                 NUMBER OF                    PAID-IN        STOCK       UNEARNED      RETAINED
                                   SHARES       AMOUNT        CAPITAL      PURCHASES   COMPENSATION    EARNINGS      TOTAL
                                -----------   -----------   -----------   -----------  ------------   -----------  -----------
                                                (In thousands, except share amounts)
<S>                              <C>          <C>           <C>           <C>          <C>            <C>          <C>        

Balance at December 31, 1995     16,343,770   $       163   $       337   $        --   $        --   $    10,155  $    10,655
  Repurchase and retirement
    of common stock                 (51,240)           --           (36)           --            --            --          (36)
  Issuance of stock to
    employees:
    Stock options exercised         130,985             1            99            --            --            --          100
    Stock purchases                                                                --            --
  Net and comprehensive income           --            --            --            --            --         2,778        2,778
                                -----------   -----------   -----------   -----------   -----------   -----------  -----------
Balance at December 31, 1996     16,423,515           164           400            --            --        12,933       13,497
  Repurchase and retirement
    of common stock                 (92,000)           (1)          (88)           --            --            --          (89)
  Issuance of stock to
    employees:
    Stock options exercised          13,250            --             9            --            --            --            9
    Stock purchases                 175,250             2           158            --            --            --          160
  Net and comprehensive income           --            --            --            --            --         4,111        4,111
                                -----------   -----------   -----------   -----------   -----------   -----------  -----------
Balance at December 31, 1997     16,520,015           165           479            --           --         17,044       17,688
  Repurchase and retirement
    of common stock                (208,350)           (2)         (227)           --            --            --         (229)
  Issuance of stock to
    employees:
    Stock options exercised          64,100             1            49           (25)           --            --           25
    Stock purchases                 685,300             7           786          (643)           --            --          150
  Stock option compensation              --            --           365            --          (114)           --          251
  Net and comprehensive income           --            --            --            --            --         3,494        3,494
                                -----------   -----------   -----------   -----------   -----------   -----------  -----------
Balance at December 31, 1998     17,061,065   $       171   $     1,452   $      (668)  $      (114)  $    20,538  $    21,379
                                ===========   ===========   ===========   ===========   ===========   ===========  ===========
</TABLE>


See accompanying notes.


                                       10
<PAGE>   11


                                 IEX Corporation

                            Statements of Cash Flows


<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,
                                                          1998         1997         1996
                                                        ----------------------------------
                                                                  (in thousands)
<S>                                                     <C>          <C>          <C>     
OPERATING ACTIVITIES
Net income                                              $  3,494     $  4,111     $  2,778
Adjustments to reconcile net income to net cash
  provided by operating activities:
      Depreciation                                         2,150        1,436          874
      Stock option compensation                              251           --           --
      Deferred income taxes                                  (15)        (450)        (283)
      Other                                                 (372)         333            5
      Changes in operating assets and liabilities:
        Receivables                                        3,610       (4,163)      (7,105)
        Inventory                                         (2,275)      (1,516)        (203)
        Prepaid expenses and other current assets            (33)        (110)         128
        Accounts payable                                   1,171           19          857
        Accrued liabilities                                  756        1,407          869
        Deferred revenue                                     856        3,665        3,046
        Income taxes payable                                (310)         636        1,268
                                                        --------     --------     --------
Net cash provided by operating activities                  9,283        5,368        2,234
INVESTING ACTIVITIES
Additions to property and equipment                       (2,235)      (2,425)      (2,095)
Sales and maturities of marketable securities              4,147        5,010        3,870
Purchases of marketable securities                       (10,567)      (4,830)      (5,170)
                                                        --------     --------     --------
Net cash used in investing activities                     (8,655)      (2,245)      (3,395)
FINANCING ACTIVITIES
Proceeds from issuance of common stock                       175          169          100
Repurchase of common stock                                  (229)         (89)         (36)
                                                        --------     --------     --------
Net cash provided by (used in) financing activities          (54)          80           64
Net increase (decrease) in cash and cash equivalents
                                                             574        3,203       (1,097)
Cash and cash equivalents at beginning of year             6,403        3,200        4,297
                                                        --------     --------     --------
Cash and cash equivalents at end of year                $  6,977     $  6,403     $  3,200
                                                        ========     ========     ========

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the year for income taxes              $  2,175     $  2,005     $    902
                                                        ========     ========     ========
</TABLE>


See accompanying notes.



                                       11
<PAGE>   12

                                 IEX Corporation

                          Notes to Financial Statements

                                December 31, 1998


1. DESCRIPTION OF BUSINESS

IEX Corporation (IEX or the Company) was founded in 1988 and incorporated in the
state of Nevada. IEX develops products and creates solutions for call centers,
telecommunications carriers, and private networks. Revenue is derived from
products and software license fees, customer support, and other services
(engineering and product development services). The Company's customers include
telecommunications product manufacturers, competitive local exchange carriers,
interexchange carriers, and organizations in various industries with significant
call center operations.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

REVENUE RECOGNITION

In October 1997, the American Institute of Certified Public Accountants (AICPA)
issued Statement of Position 97-2, "Software Revenue Recognition" (SOP 97-2).
The Company adopted SOP 97-2 for transactions entered into beginning January 1,
1998. SOP 97-2 did not have a material effect on the Company's 1998 financial
statements as compared to prior years presented.

The Company recognizes revenue from standard products (hardware and software)
and software license fees when the products are delivered, provided no future
vendor obligations exist and collection is probable. Revenue from products
involving installation or other services is recognized as the services are
performed. In software arrangements that include rights to multiple software
products, specified upgrades, customer support services, or other services, the
Company allocates the total arrangement fee among each deliverable based on the
relative fair value of each of the deliverables based on the Company's pricing
policies and historical revenues generated from similar arrangements. If product
and software license fee transactions include the right to receive specified
future products, a portion of the fee is deferred and recognized as these
products are delivered.

The Company recognizes revenue on its contracts involving significant production
or customization based on the percentage-of-completion method of contract
accounting. Percentage-of-completion is measured either by designated milestones
of work performed or input measures, such as hours or costs incurred compared to
total estimated hours or costs. Provisions for losses are recorded on contracts
as soon as it is estimated that contract costs will exceed contract revenue.



                                       12
<PAGE>   13


                                 IEX Corporation

                    Notes to Financial Statements (Continued)


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

REVENUE RECOGNITION (CONTINUED)

Customer support contracts allow customers to receive updated versions of the
Company's products when and if they become available, as well as technical
support for the product. Revenue from customer support contracts, including
customer support included in initial licensing fees, is recognized ratably over
the support contract period. All significant costs and expenses associated with
customer support contracts are expensed ratably over the support contract
period. When products and software license fees, customer support and other
services are billed prior to the time the related revenue is recognized,
deferred revenue is recorded and related costs paid in advance are deferred.

In December, 1998, Statement of Position 98-9, "Modification of SOP 97-2,
Software Revenue Recognition, with Respect to Certain Transactions" ("SOP 98-9")
was released. SOP 98-9 amends SOP 97-2 to require than an entity recognize
revenue for multiple element arrangements by means of the "residual method" when
(1) there is vendor-specific objective evidence ("VSOE") of the fair value of
all of the undelivered elements that are not accounted for by means of long-term
contract accounting, (2) VSOE of fair value does not exist for one or more of
the delivered elements and (3) all revenue recognition criteria of SOP 97-2
(other than the requirement for VSOE of the fair value of each delivered
element) are satisfied. The provisions of SOP 98-9 that extend the deferral of
certain passages of SOP 97-2 became effective December 15, 1998. All other
provisions of SOP 98-9 will be effective for transactions that are entered into
in fiscal years beginning after March 15, 1999. The Company is currently
evaluating the requirements of SOP 98-9 and the effects, if any, it may have on
the Company's current revenue recognition policies.

CASH AND CASH EQUIVALENTS

Cash and cash equivalents consist of financial instruments and marketable
securities with maturities of three months or less when purchased.

MARKETABLE SECURITIES

The Company's marketable securities primarily consist of interest-bearing
municipal bonds. All marketable securities are classified as available-for-sale.
Marketable securities are carried at fair value, with material unrealized gains
and losses reported as a separate component of shareholders' equity. The fair
value of marketable securities is determined based upon quoted market prices.
Realized and unrealized gains and losses on marketable securities were not
material during 1998, 1997 and 1996.



                                       13
<PAGE>   14

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

INVENTORY

Inventories are stated at the lower of cost or market and consist primarily of
components of the Company's DaVinci service node products which have not been
fully assembled and shipped at year end. The cost of all inventory is based on
the purchase price of the specific inventory item.

PROPERTY AND EQUIPMENT

Property and equipment are stated at cost. Depreciation is provided on a
straight-line basis using the following useful lives:

<TABLE>
<S>                                            <C>      
       Computer equipment                      3-7 years
       Furniture and fixtures                  3-5 years
       Leasehold improvements                    5 years
</TABLE>

PRODUCT DEVELOPMENT AND ENHANCEMENTS

Costs of internally developed software products and substantial enhancements to
existing software products are expensed until technological feasibility is
established, at which time any additional costs would be capitalized in
accordance with Statement of Financial Accounting Standards (SFAS) No. 86.
Because the Company believes its current process for developing software is
essentially completed concurrently with the establishment of technological
feasibility, no costs have been capitalized to date.

ADVERTISING COSTS

The Company expenses advertising costs as incurred. Advertising expenses totaled
approximately $981,000, $631,000 and $386,000 in 1998, 1997 and 1996,
respectively.

RISK CONCENTRATIONS

Financial instruments that potentially subject the Company to concentrations of
credit risk are marketable securities and accounts receivable. Marketable
securities consist primarily of high quality municipal bonds. A significant
portion of accounts receivable is with large customers throughout the United
States. The Company continuously evaluates the creditworthiness of its
customers' and generally does not require collateral.



                                       14
<PAGE>   15

                                 IEX Corporation

                    Notes to Financial Statements (Continued)


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes.
Actual results could differ from those estimates.

STOCK-BASED COMPENSATION

The Company accounts for its stock-based compensation in accordance with
provisions of the Accounting Principles Board's Opinion No. 25 (APB No. 25),
"Accounting for Stock Issued to Employees."

COMPREHENSIVE INCOME

In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income" (SFAS
130), which requires disclosure of total comprehensive income. The adoption of
this Statement had no impact on the Company's financial statements as net income
was the only component of comprehensive income during 1998, 1997 and 1996.

RECENT ACCOUNTING PRONOUNCEMENT

In March 1998, the AICPA issued Statement of Position 98-1, "Accounting for the
Costs of Computer Software Developed or Obtained for Internal Use" (SOP 98-1),
which is effective for fiscal years beginning after December 15, 1998. The
Company expects to adopt the standard in fiscal 1999. The effect of adoption is
not expected to be material to the Company's financial position or results of
operations.

RECLASSIFICATIONS

Certain prior year amounts have been reclassified to conform to current year
presentations.



                                       15
<PAGE>   16

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



3. RECEIVABLES

Receivables consist of the following as of December 31:

<TABLE>
<CAPTION>
                                                           1998            1997
                                                          ----------------------
                                                              (In thousands)
<S>                                                       <C>            <C>    
Trade accounts receivable                                 $13,009        $17,653
Unbilled receivables                                        2,383          1,350
                                                          -------        -------
                                                           15,392         19,003
 Less:  Allowance for doubtful accounts                       505            724
                                                          -------        -------
                                                          $14,887        $18,279
                                                          =======        =======
</TABLE>

4. MARKETABLE SECURITIES

The estimated fair value of debt securities at December 31, 1998, by contractual
maturity, are shown below. Expected maturities can differ from contractual
maturities because the issuers of the securities may have the right to prepay
obligations without prepayment penalties.

<TABLE>
<CAPTION>
                                                                      ESTIMATED FAIR
                                                                         VALUE
                                                                     ----------------
                                                                     (In thousands)
<S>                                                                  <C>    
Due in three months or less                                              $   875
Due after three months through one year                                    7,173
Due after one year through two years                                       3,192
                                                                         -------
                                                                         $11,240
                                                                         =======
</TABLE>

5. PROPERTY AND EQUIPMENT

Property and equipment consist of the following at December 31:

<TABLE>
<CAPTION>
                                                           1998            1997
                                                          ----------------------
                                                              (In thousands)
<S>                                                       <C>             <C>   
At cost:
  Computer equipment                                      $6,227          $7,236
  Furniture and fixtures                                     389             358
  Leasehold improvements                                     916             488
                                                          ------          ------
                                                           7,532           8,082
Less:  Accumulated depreciation                            4,027           4,816
                                                          ------          ------
                                                          $3,505          $3,266
                                                          ======          ======
</TABLE>


                                       16
<PAGE>   17

                                 IEX Corporation

                    Notes to Financial Statements (Continued)


6. INCOME TAXES

The income tax provision (benefit) for the years ended December 31 is as
follows:

<TABLE>
<CAPTION>
                                               1998         1997          1996
                                              ---------------------------------
                                                       (In thousands)
<S>                                           <C>          <C>          <C>    
Federal income taxes:
  Current                                     $ 1,769      $ 2,449      $ 1,467
  Deferred                                        (15)        (450)        (283)
                                              -------      -------      -------
Total federal income tax provision              1,754        1,999        1,184

State income taxes                                 75           79           49
                                              -------      -------      -------
Total income tax provision                    $ 1,829      $ 2,078      $ 1,233
                                              =======      =======      =======
</TABLE>

The deferred income tax assets at December 31 are as follows:

<TABLE>
<CAPTION>
                                                             1998          1997
                                                            --------------------
                                                             (In thousands)
<S>                                                         <C>           <C>   
Current deferred income tax assets:
  Accrued employee benefits                                 $  773        $  789
  Other                                                        388           368
                                                            ------        ------
                                                             1,161         1,157

Noncurrent deferred income tax assets:
  Property and equipment                                       169           158
                                                            ------        ------

Total deferred income tax assets                            $1,330        $1,315
                                                            ======        ======
</TABLE>

The following reconciling items account for the difference between the Company's
effective tax rate on pretax income and the U.S. federal income tax statutory
rate for the years ended December 31:


<TABLE>
<CAPTION>
                                                 1998        1997         1996
                                                -------------------------------
                                                        (In thousands)
<S>                                             <C>         <C>         <C>    
Federal income tax at statutory rate            $ 1,810     $ 2,104     $ 1,364
Nontaxable items                                    (21)        (79)        (70)
Effect of state income taxes, net of federal
  benefit                                            50          53          32
Other                                               (10)         --         (93)
                                                -------     -------     -------
                                                $ 1,829     $ 2,078     $ 1,233
                                                =======     =======     =======
</TABLE>



                                       17
<PAGE>   18

                                 IEX Corporation

                    Notes to Financial Statements (Continued)


7. SIGNIFICANT CUSTOMERS

During 1998, 1997 and 1996, individual customers which generated revenues in
excess of 10% of total company revenues in each year were as follows:

<TABLE>
<CAPTION>
                                                1998         1997          1996
                                                ----         ----          ----
<S>                                             <C>          <C>           <C>

Manufacturing customer                            *           18%           19%
Telecommunications customer                       *            *            13%
Transportation customer                          14%           *             *
</TABLE>

* Revenues did not exceed 10% of total revenues.

8. RELATED PARTY TRANSACTIONS

Under the terms of a 1988 management stock agreement with an affiliate, the
Company has granted to this affiliate the right to purchase 3 1/2% of the
Company's authorized common stock for $10,500 ($.015 per share) upon the
occurrence of certain events.

The Company also participates in a management contract with this affiliate for
certain administrative services. The cost of such services totaled $900,000,
$900,000 and $856,000 for the years ended December 31, 1998, 1997 and 1996,
respectively, and is included in general and administrative expenses in the
accompanying statements of income. At December 31, 1998 and 1997, $150,000 and
$0 were payable to this affiliate.

9. EMPLOYEE BENEFIT PLANS

During 1997 and 1996, the Company and its employees participated in a profit
sharing and savings plan which was established and administered by an
affiliate and covered substantially all employees of the Company and certain
other affiliates. Effective December 31, 1997, the Company discontinued its
participation in this plan and adopted its own plan, which provides
substantially the same benefits. All full-time and certain part-time employees
of the Company are eligible to participate in the plan upon six months service
at designated enrollment dates. The Board of Directors may authorize
discretionary matching and profit sharing contributions each year based on a
percentage of eligible compensation.



                                       18
<PAGE>   19

                                 IEX Corporation

                    Notes to Financial Statements (Continued)

9. EMPLOYEE BENEFIT PLANS  (CONTINUED)

Company matching contributions vest immediately and profit sharing contributions
vest over a period of five years. Plan expenses in 1998, 1997 and 1996 were
approximately $1,210,000, $963,000 and $757,000, respectively.

During 1997 and 1996, the Company participated in a health and welfare benefit
trust which was administered by an affiliate. This trust provided benefits for
death, sickness, accident, and disability. Effective December 31, 1997, the
Company discontinued its participation in the trust and adopted its own plan
which provides substantially the same benefits. Health and welfare expenses were
approximately $1,548,000, $1,039,000 and $878,000 in 1998, 1997 and 1996,
respectively.

10. EQUITY AND COMMON STOCK

The Company provides a stock purchase program to substantially all of its
employees. On a periodic basis, generally annually, offers are made to eligible
employees to purchase common stock of the Company. Employee offers are
determined at the sole discretion of the Company's Board of Directors. The
purchase price for the offers is designated as the book value of the Company's
common stock as of the quarter end immediately preceding the stock purchase
offer date. Employees may purchase stock with cash or issuance of a recourse
note to the Company.

Under separate agreements between the Company and certain of its employee
shareholders, the Company has the right of first refusal (upon certain events,
including the termination of employment by the employee shareholder) to
repurchase the outstanding common stock of these shareholders based upon a
formula price ($1.25 per share at December 31, 1998).

In 1996, the Company's Board of Directors adopted the 1996 Stock Incentive Plan
(the Stock Option Plan). SFAS No. 123, "Accounting for Stock-Based
Compensation," encourages, but does not require, companies to record
compensation cost for stock option plans at fair value. The Company has elected
to continue to account for stock-based compensation using the intrinsic value
method prescribed in APB No. 25 and related interpretations.



                                       19
<PAGE>   20

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



10. EQUITY AND COMMON STOCK (CONTINUED)

Accordingly, compensation expense for stock options is measured as the excess,
if any, of the market price of the Company's underlying stock at the date of the
grant over the amount an employee must pay to acquire the stock. Compensation
cost is recorded annually based on the market price of the Company's stock at
the end of the period.

The Company's Board of Directors authorized the granting of options covering up
to 2,000,000 shares of the Company's common stock under the Stock Option Plan.
All options granted have seven-year terms and vest in five equal installments on
the first, second, third, fourth, and fifth anniversaries of the date of grant.

Pro forma information is required by SFAS No. 123 has been determined as if the
Company had accounted for its stock options under the fair value method. The
fair value of the options was estimated at the date of the grant using the Black
Scholes method option pricing model assuming a weighted-average expected life of
an option of five years, no dividend yields, and a volatility of .01. Risk-free
interest rates of 6% and 5% were used for 1997 and 1996, respectively. The
weighted-average grant-date values for options granted in 1997 and 1996 were
$0.31 and $.20, respectively. The effect of applying SFAS No. 123's fair value
method to the Company's stock options results in net income that is not
materially different from the amounts reported in 1998, 1997, and 1996.

A summary of the Company's stock option activity and related information
follows:



                                       20
<PAGE>   21

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



10. EQUITY AND COMMON STOCK (CONTINUED)

<TABLE>
<CAPTION>
                                                         NUMBER OF       EXERCISE PRICE/
                                                           SHARES     WEIGHTED AVG. PRICE
                                                         ---------    -------------------
<S>                                                      <C>          <C> 

Options outstanding at December 31, 1995                        --         $  --
  Options granted                                          418,000          0.75
  Options exercised                                             --            --
  Options canceled                                          (5,500)         0.75
                                                          --------         -----
Options outstanding at December 31, 1996                   412,500          0.75
  Options granted                                          569,000          0.90
  Options exercised                                        (13,250)         0.75
  Options canceled                                         (40,750)         0.83
                                                          --------         -----
Options outstanding at December 31, 1997                   927,500          0.84
  Options granted                                               --            --
  Options exercised                                        (64,100)         0.77
  Options canceled                                         (52,650)         0.84
                                                          --------         -----
Options outstanding at December 31, 1998                   810,750         $0.85
                                                          ========         =====
</TABLE>

Options outstanding at December 31, 1998, had exercise prices ranging from $0.75
to $0.90 and a weighted-average remaining contractual life of 5.2 years. Of the
total outstanding options, 174,950 were exercisable at December 31, 1998, at a
weighted-average exercise price of $0.84 per share.

11. COMMITMENTS AND CONTINGENCIES

The Company rents all of its facilities under operating leases. Rent expenses
for all operating leases for the years ended December 31, 1998, 1997 and 1996,
were approximately $1,010,000, $821,000 and $551,000, respectively. Future
minimum lease payments at December 31, 1998, related to the Company's
noncancelable leases are as follows (in thousands):

<TABLE>
<S>                                                                       <C>   
       1999                                                               $1,060
       2000                                                                1,050
       2001                                                                1,055
       2002                                                                1,060
       2003                                                                  442
                                                                          ------
                                                                          $4,667
                                                                          ======
</TABLE>



                                       21
<PAGE>   22

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



11. COMMITMENTS AND CONTINGENCIES (CONTINUED)

The Company has certain contingent liabilities resulting from litigation,
claims, commitments, and other matters incident to the ordinary course of
business. Management believes that the ultimate resolution of such contingencies
will not have a material adverse effect on the financial position or results of
operations of the Company.

12. OPERATING SEGMENT INFORMATION

The Company's operating segments are strategic operating units that are managed
separately due to differences in products, services or customer applications.
The Intelligent Network Products segment develops and supplies the Company's
DaVinci Service Node Products, which enable enhanced services through Service
Control Point, Service Switching Point and Interactive Voice Response network
elements. The Call Center products segment develops and supplies the Company's
TotalView and TotalNet software products. These products provide workforce
management and intelligent call routing systems for single and multiple site
call centers. The Applied Technology segment performs systems integration,
consulting and customized application development for original equipment
manufacturer product and joint research and development projects. This segment
includes the sale of customized equipment, professional services and
maintenance to two customers under long-term contracts. The Other operating
segment consists of special project professional services performed for a
limited number of customers and certain development expenses incurred by the
Company which are not attributable to the operating segments.

Substantially all revenues are generated from customers located in North
America. In addition, substantially all of the Company's assets are located in
North America. Transfers between operating segments are immaterial. All
corporate overhead expenses, such as information systems costs and general and
administrative salaries and benefits, incurred by the Company are allocated to
the operating segments for purposes of management's review of profitability by
segment.




                                       22


<PAGE>   23

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



12. OPERATING SEGMENT INFORMATION (CONTINUED)

The Company's operating segment information is as follows (in thousands):

<TABLE>
<CAPTION>

Net Revenues:                             1998        1997        1996
                                        -------     -------     -------
<S>                                     <C>         <C>         <C>
Intelligent Network Products            $16,903     $14,321     $ 7,025
Call Center Products                     22,501      15,280      11,074
Applied Technology                        8,001      10,705       8,566
Other                                     1,876       2,601       2,484
                                        -------     -------     -------
Total Net Revenues                      $49,281     $42,907     $29,149
                                        =======     =======     =======

Operating Income (Loss):                  1998        1997        1996
                                        -------     -------     -------
Intelligent Network Products            $    47     $ 1,016     $  (133)
Call Center Products                      5,131       3,084       2,784
Applied Technology                          (99)      2,137         605
Other                                      (268)        468         209
                                        -------     -------     -------
Total Operating Income (Loss)           $ 4,811     $ 6,705     $ 3,465
                                        =======     =======     =======
</TABLE>






                                       23


<PAGE>   24

                                 IEX Corporation

                    Notes to Financial Statements (Continued)



13. YEAR 2000 ISSUE (UNAUDITED)

General Description of the Year 2000 Issue

The Year 2000 Issue is the result of computer programs being written using two
digits rather than four to define the applicable year. Any of the Company's
computer programs or hardware that have date-sensitive software or embedded
chips may recognize a date using "00" as the year 1900 rather than the year
2000. This could result in a system failure or miscalculations causing
disruptions of normal business activities. The Company has been and is
continuing to assess these issues in relation to the Company's products, its
significant internal systems and significant third party relationships.

The Company has formed a task force to address the Year 2000 issue. The task
force's plan to resolve the Year 2000 issue involves five phases: Awareness,
Assessment, Renovation, Validation and Implementation. The results of the
activities performed to date and the expectation regarding required activities
are discussed below.

IEX Products

The Company has completed a Year 2000 analysis of its products. The analysis
included internal testing. However, the Company does not plan to have its
products tested by an independent third party. The Company believes the current
versions of its products are Year 2000 compliant. The Company has already
provided its Year 2000 compliant versions of these products to many of its
customers through its normal process for distributing new versions of its
products to customers participating in the Company's customer support services
programs. The Company is working with its customers to migrate to Year 2000
compliant versions of its products and expects to complete these activities
before December 31, 1999. Accordingly, the Company estimates it is 100% complete
regarding the Awareness, Assessment and Renovation Phases; approximately 75%
complete regarding the Validation Phase; and 50% complete in terms of the
Implementation Phase.



                                       24



<PAGE>   25

                                 IEX Corporation

                    Notes to Financial Statements (Continued)


13. YEAR 2000 ISSUE (UNAUDITED) (CONTINUED)

Some of the Company's products include hardware and software components provided
by third parties. The Company believes that current versions of significant
third party components are Year 2000 compliant based on representations from its
vendors or the results of internal testing of these components. The Company is
working with its customers to migrate to the Year 2000 compliant versions of
these components. However, since the Assessment Phase with respect to third
party-provided components included in the Company's products is not complete,
and the Company cannot ensure that customers migrate their third party
components to Year 2000 compliant versions, there can be no assurance that all
Year 2000 compliant versions of these components will be available and
implemented before December 31, 1999.

Certain customers may be operating non-compliant versions of products where the
Company's agreed-upon product support and warranty periods have expired. The
Company has not analyzed these customers to determine whether they are taking
appropriate steps to address any Year 2000 issues.

The Company does not expect customers who purchase or migrate to Year 2000
compliant versions of its products to experience any Year 2000 failures caused
by such products. Also, the Company believes its license and support agreements
contain customary and appropriate limitations with regard to the Company's
obligations for any Year 2000 failures that may be caused by its current or
former products. However, since there can be no assurance that the Company's
products will not experience Year 2000 issue-related failures, there can also be
no assurances that the business, financial, condition, or results of operations
of the Company will not be materially adversely impacted by losses associated
with the failures.

The Company has not incurred and does not expect to incur any significant
incremental expenses in addressing the Year 2000 issue with regard to its
products. Development activities to resolve issues were not significant and were
performed in the normal development and testing process, and remaining
implementation activities are not expected to result in significant costs to the
Company. Some incremental people costs may be incurred in order to provide an
increased level of customer support staffing during the period immediately
preceding and immediately after the new year; however, in the aggregate these
incremental costs are not expected to be material.



                                       25


<PAGE>   26

                                 IEX Corporation

                    Notes to Financial Statements (Continued)


13. YEAR 2000 ISSUE (UNAUDITED) (CONTINUED)

Significant Internal Systems

The Company is approximately 50% complete with its assessment (Assessment Phase)
of significant internal systems with respect to Year 2000 compliance. The
Company has identified significant internal systems that are not Year 2000
compliant such as its general accounting software and its facility security
system. As part of this analysis, the Company is requesting suppliers of
significant third party systems to summarize their level of Year 2000
compliance. The Company expects to complete the Assessment Phase by April 30,
1999. The Company believes its significant internal systems will be Year 2000
compliant by December 31, 1999; however, there can be no assurances that all
significant internal systems will not experience any Year 2000 failures.

The Company expects a large percentage of its hardware and software relating to
significant internal systems to be made Year 2000 compliant with minimal cost to
the Company because of vendor obligations to the Company through various support
arrangements or vendor programs to provide Year 2000 compliant versions. The
total estimated costs to the Company to migrate significant internal systems not
covered under current support agreements to Year 2000 compliant versions is not
yet available as the Assessment Phase is not yet complete. However, the Company
has already received cost estimates from third parties to migrate certain
systems known to be non-compliant, totaling approximately $50,000. Other direct
costs associated with this effort, namely people-related costs, are estimated to
be $100,000.

If the Company experiences failures with significant internal systems resulting
from Year 2000 issues, operations may be significantly adversely effected,
including not being able to process orders, invoice customers, perform standard
voice and data communications or support its customers. If any of these failures
occur, the Company's business, financial condition and results of operations may
be materially adversely impacted, including losses associated with a material
adverse outcome in a Year 2000 claim or lawsuit.

As part of the Company's Year 2000 analysis, a contingency plan designed to
mitigate the impact of Year 2000-related failures will be developed before
December 31, 1999. However, if Year 2000 failures occur and the contingency plan
is implemented, there can be no assurance that the plan will enable the Company
to avoid the potentially material adverse impact to its business, financial
condition and results of operations.



                                       26




<PAGE>   27
ITEM 7(b): UNAUDITED PRO FORMA CONDENSED COMBINING FINANCIAL INFORMATION

     The following unaudited pro forma condensed combining statements of
operations for the twelve months ended December 31, 1998, are set forth herein
to give effect to the acquisition of IEX Corporation by Tekelec for $163 million
comprised of $63 million in cash and $100 million in collateralized promissory
notes, as if the acquisition had occurred on January 1, 1998. The acquisition
was accounted for as a purchase, and resulted in the Company recording
intangible assets amounting to $170.3 million, of which $6.0 million has been
allocated to in-process research and development. The unaudited pro forma
condensed combining balance sheet data gives effect to the acquisition of IEX
Corporation by Tekelec as if such acquisition had occurred on December 31, 1998.
The unaudited pro forma adjustments and assumptions are based on estimates,
evaluations and other data currently available. The unaudited pro forma
condensed combining statements of operations are provided for illustrative
purposes only and are not necessarily indicative of the combined results of
operations that would have been reported had the acquisition occurred on January
1, 1998, nor does it represent a forecast of the combined future results of
operations for any future periods. All information contained herein should be
read in conjunction with the Consolidated Financial Statements and notes thereto
and the "Management's Discussion and Analysis of Financial Results of
Operations" included in the Company's report on Form 10-K for the year ended
December 31, 1998, the financial statements and notes thereto of IEX Corporation
included in this report on Form 8-K and the notes to the Unaudited Pro forma
Condensed Combining Financial Information.



                                       27
<PAGE>   28

                           TEKELEC AND IEX CORPORATION
        UNAUDITED PRO FORMA CONDENSED COMBINING STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                               FOR THE YEAR ENDED DECEMBER 31, 1998
                                                    ---------------------------------------------------------
                                                                                                       PRO
                                                                                      PRO FORMA       FORMA
                                                     TEKELEC           IEX           ADJUSTMENTS     COMBINED
                                                    ---------       ---------        -----------     --------

<S>                                                 <C>             <C>               <C>                  <C>    
Revenues.......................................     $ 176,669       $  49,281         $      --      $ 225,950

Costs and expenses:
    Cost of goods sold.........................        58,902          19,055                --         77,957
    Research and development...................        26,371           6,852                --         33,223
    Selling, general and administrative........        40,458          18,563                --         59,021
    Other acquisition costs, including
      amortization of goodwill and other
      purchased intangibles....................            --              --            34,849(a)      34,849
                                                    ---------       ---------         ---------      ---------
        Total costs and expenses...............       125,731          44,470            34,849        205,050
                                                    ---------       ---------         ---------      ---------

Income from operations.........................        50,938           4,811           (34,849)        20,900
Other income (expense)
    Interest, net..............................         4,785             477           (12,645)(b)     (7,383)
    Other, net.................................          (172)             35                --           (137)
                                                    ---------       ---------         ---------      ---------
        Total other income (expense)...........         4,613             512           (12,645)        (7,520)
                                                    ---------       ---------         ---------      ---------

Income before provision for income taxes.......        55,551           5,323           (47,494)        13,380
    Provision for (benefit from) income taxes..        16,342           1,829           (10,749)(c)      7,422
                                                    ---------       ---------         ---------      ---------
        Net income.............................     $  39,209       $   3,494         $ (36,745)     $   5,958
                                                    =========       =========         =========      =========
Earnings per share:
    Basic......................................     $    0.73                                        $    0.11
    Diluted....................................          0.67                                             0.10

Weighted average number of shares outstanding:
    Basic......................................        53,518                                           53,518
    Diluted....................................        58,708                               311(g)      59,019
</TABLE>


   See Notes to Unaudited Pro forma Condensed Combining Financial Information


                                       28
<PAGE>   29

                           TEKELEC AND IEX CORPORATION
             UNAUDITED PRO FORMA CONDENSED COMBINING BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                      FOR THE YEAR ENDED DECEMBER 31, 1998
                                                           ---------------------------------------------------------
                                                                                                             PRO
                                                                                             PRO FORMA      FORMA
                                                            TEKELEC           IEX           ADJUSTMENTS    COMBINED
                                                           ---------       ---------        -----------    ---------

<S>                                                        <C>             <C>              <C>            <C>
Assets:
Cash and cash equivalents...........................       $  31,932        $  6,977        $(20,000)(d)   $  18,909
Short-term investments, at fair value...............          37,704           7,173         (13,000)(d)      31,877
Accounts and notes receivable.......................          56,502          14,887              --          71,389
Inventories.........................................          12,872           4,619              --          17,491
Prepaid expenses and other current assets...........          11,965           1,678              --          13,643
                                                           ---------        --------        --------        --------
    Total Current Assets............................         150,975          35,334         (33,000)        153,309

Long-term investments, at fair value................          44,138           3,192         (30,000)(d)      17,330
Property and Equipment, net.........................          12,859           3,505              --          16,364
Other Assets........................................           2,270             169              --           2,439
Intangibles from IEX Acquisition....................              --              --         164,246(d)(e)   164,246
                                                           ---------        --------        --------        --------
    Total Assets....................................       $ 210,242        $ 42,200        $101,246        $353,688
                                                           =========        ========        ========        ========

Liabilities:
Notes Payable.......................................       $      --        $     --        $100,000        $100,000
Trade accounts payable..............................          10,904           2,737              --          13,641
Accrued liabilities.................................          16,592           5,477           2,000(d)       24,069
Other current liabilities...........................          14,717          12,607              --          27,324
                                                           ---------        --------        --------        --------
    Total current liabilities.......................          42,213          20,821         102,000         165,034

Deferred income taxes...............................              --              --          26,625(d)       26,625
Other...............................................           2,252              --              --           2,252
                                                           ---------        --------        --------        --------
    Total Liabilities...............................          44,465          20,821         128,625         193,911
                                                           ---------        --------        --------        --------

Shareholders' equity:
Common stock........................................          92,803             841            (841)(f)      92,803
Retained earnings...................................          72,084          20,538         (26,538)(e)(f)   66,084
Translation Adjustment..............................             890              --              --             890
                                                           ---------        --------        --------        --------
    Total shareholders' equity......................         165,777          21,379         (27,379)        159,777
                                                           ---------        --------        --------        --------
    Total liabilities and shareholders' equity......       $ 210,242        $ 42,200        $101,246        $353,688
                                                           =========        ========        ========        ========
</TABLE>


   See Notes to Unaudited Pro forma Condensed Combining Financial Information


                                       29
<PAGE>   30

NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINING FINANCIAL INFORMATION

Note 1. The unaudited pro forma condensed combining statement of operations for
Tekelec and IEX for the twelve months ended December 31, 1998 have been prepared
as if the acquisition, which has been accounted for as a purchase, was completed
on January 1, 1998. The unaudited pro forma combined diluted earnings per share
is based on the weighted average number of common shares of Tekelec Common Stock
and dilutive common stock equivalents outstanding during the period, adjusted to
give effect to the dilutive effect of approximately 1.8 million options to
purchase Tekelec Common Stock granted to IEX employees in connection with the
acquisition.

Note 2. The unaudited pro forma condensed combining balance sheet of Tekelec and
IEX has been prepared as if the acquisition, which has been accounted for as a
purchase, was completed on December 31, 1998. Aggregate consideration of $163.0
million, $2.0 million of estimated acquisition costs and approximately $47.5
million in liabilities assumed, which include deferred tax liabilities of $26.6
million recorded in connection with the transaction, resulted in approximately
$170.3 million in intangible assets.

The allocation of the purchase price among identifiable tangible and intangible
assets was based on an appraisal of the fair market value of those assets.
Specifically, purchased in-process research and development was identified and
valued through interviews concerning each IEX development project. Expected
future cash flows of each development project were discounted to present value
taking into account risks associated with the inherent difficulties and
uncertainties in competing the project, and thereby achieving technological
feasibility, and risks related to the viability of and potential changes in
future target markets.

The above analysis and valuation resulted in approximately $6.0 million of
purchased in-process research and development which has not yet reached
technological feasibility and does not have alternative future uses. Therefore,
in accordance with generally accepted accounting principles, this amount was
written off at the time of acquisition. A value of $57.0 million was allocated
to developed and existing technology.



                                       30
<PAGE>   31

Using the same methodology, other intangibles were identified and valued.
Expected future cash flows associated with these intangibles were discounted to
present value taking into consideration risks related to the characteristics of
each item. The amounts identified as intangible assets as well as goodwill
arising from the transaction are expected to be amortized over estimated useful
lives ranging from three to five years. Intangibles were categorized as follows:

<TABLE>
<CAPTION>
                                                    Allocated
        Category                                   Value ($000)
        ------------------------------------       ------------
<S>                                                <C>        
        In-process research and development           $  6,000
        Developed and existing technology               57,000
        Other intangibles                               14,000
        Goodwill                                        93,246
                                                      --------
        Total intangibles                             $170,246
                                                      ========
</TABLE>

Note 3. The unaudited pro forma condensed combining statements of operations for
Tekelec and IEX do not include the $6.0 million charge for purchased in-process
research and development resulting from the acquisition, as it is a material
non-recurring charge.

Note 4. The following pro forma adjustments are reflected in the unaudited pro
forma condensed combining financial information:

(a)  Reflects the amortization of intangibles associated with the purchase of
     IEX as if the acquisition was completed on January 1, 1998. Amortization is
     recognized over the estimated useful lives of the assets acquired,
     generally from three and five years. The unaudited pro forma statement of
     operations excludes the write-off of $6.0 million of purchased in-process
     research and development due to its non-recurring nature.

(b)  Reflects the estimated interest income foregone based on the $63 million of
     cash consideration paid and interest expense incurred on the $100 million
     promissory notes issued as if the acquisition had been completed on January
     1, 1998.

(c)  Reflects the tax effect of the pro forma adjustments.

(d)  Reflects the allocation of the purchase price based on fair market values
     to the historical balance sheet and the related tax effects.

(e)  Reflects the write-off of purchased in-process research and development
     identified in the purchase price allocation.

(f)  Reflects the elimination of IEX's equity accounts.

(g)  Reflects the dilutive effect of approximately 1.8 million options to
     purchase Tekelec Common Stock granted to IEX employees in connection with
     the acquisition, assuming the grant had taken place as of January 1, 1998,
     using a fair market value at date of grant of $16.22 and an average fair
     market value for the year of $19.51.


                                       31

<PAGE>   32

                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>
    Exhibit
    Number                           Description of Exhibit
    -------                          ----------------------
<S>              <C>
      2.01       Agreement and Plan of Reorganization dated as of April 20, 1999
                 by and among Tekelec, Eagle Lonestar Corporation, IEX
                 Corporation, IEX Partners, Teknekron Partners II, Gary Crockett
                 and Stephen Lynn. (Pursuant to Item 601(b)(2) of Regulation
                 S-K, certain exhibits and schedules have been omitted but will
                 be furnished supplementally to the Commission upon request).

      4.01       Note and Security Agreement dated as of May 7, 1999 by and
                 among Tekelec, IEX Corporation and the Significant Stockholders
                 of IEX Corporation.

      4.02       Secured Promissory Notes dated as of May 7, 1999 made by Tekelec
                 and IEX Corporation in favor of each of the Significant
                 Stockholders of IEX Corporation.

      23.1       Consent of Ernst & Young LLP
</TABLE>



<PAGE>   1

                                                                    EXHIBIT 2.01


         AGREEMENT AND PLAN OF REORGANIZATION DATED AS OF APRIL 20, 1999
                                  by and among
       Tekelec, Eagle Lonestar Corporation, IEX Corporation, IEX Partners,
             Teknekron Partners II, Gary Crockett and Stephen Lynn


<PAGE>   2

The following Exhibits and Schedules to the Plan have not been filed and shall
be furnished to the Commission upon request:

     o    Exhibit A (Form of Articles of Merger) sets forth terms for possible
          inclusion in any Articles of Merger or similar document required to be
          filed under applicable state law to effect the Merger;

     o    Exhibit B (Form of Notes) is included as Exhibit A to the Note and
          Security Agreement set forth in Exhibit 4.01 to this Form 8-K;

     o    Exhibit C (Form of Voting Agreement) is an agreement entered into by
          Tekelec and each of the Significant Stockholders providing, in part,
          that each Significant Stockholder vote in favor of the Merger;

     o    Exhibit D (Form of Escrow Agreement), as entered into by parties
          thereto, is described in Item 2 of this Form 8-K;

     o    Exhibit E (Form of Non-Competition Agreement), as entered into by
          parties thereto, is described in Item 2 of this Form 8-K;

     o    Exhibit F (Form of Note and Security Agreement), as entered into by
          parties thereto, is included as Exhibit 4.01 to this Form 8-K; and

     o    Schedules 7.7 and 8.5 (Forms of Opinions of Counsel) set forth matters
          for possible inclusion in legal opinions to be rendered by counsel for
          parties to the Plan.


<PAGE>   3
                                                               [EXECUTION COPY]

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





                      AGREEMENT AND PLAN OF REORGANIZATION

                                      AMONG

                                    TEKELEC,

                                IEX CORPORATION,

                           EAGLE LONESTAR CORPORATION

                                       AND

                         STOCKHOLDERS OF IEX CORPORATION








                                                                 APRIL 20, 1999


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

<PAGE>   4

                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                           Page
                                                                                           ----
<S>                                                                                        <C>
1.      PLAN OF REORGANIZATION...............................................................2
        1.1    The Merger....................................................................2
        1.2    Effective Time of the Merger..................................................2
        1.3    Merger Consideration..........................................................2
        1.4    Company Dissenting Shares.....................................................4
        1.5    Surrender of Certificates and Establishment of Escrow.........................5
        1.6    No Further Ownership Rights in Company Common Stock...........................6
        1.7    Lost, Stolen or Destroyed Certificates........................................6
        1.8    Stockholder Representatives...................................................6
        1.9    Additional Effects of the Merger..............................................7
        1.10   Further Assurances............................................................7

2.      REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND
        THE STOCKHOLDERS.....................................................................8
        2.1    Organization and Good Standing; Title.........................................8
        2.2    Power, Authorization and Validity.............................................9
        2.3    Capitalization................................................................9
        2.4    Subsidiaries.................................................................10
        2.5    No Conflict..................................................................10
        2.6    Proceedings; Orders..........................................................11
        2.7    Company Financial Statements.................................................12
        2.8    Taxes........................................................................13
        2.9    Title to Properties..........................................................14
        2.10   Absence of Certain Changes...................................................14
        2.11   Agreements and Commitments...................................................16
        2.12   No Default; No Consent Required; No Restrictions.............................17
        2.13   Intellectual Property........................................................18
        2.14   Compliance with Laws.........................................................21
        2.15   Certain Transactions and Agreements..........................................22
        2.16   Employees....................................................................22
        2.17   Corporate Documents..........................................................25
        2.18   No Brokers...................................................................25
        2.19   Bank Accounts................................................................25
        2.20   Insurance....................................................................25
        2.21   Environmental Matters........................................................25
        2.22   Customers....................................................................26
        2.23   Accounts Receivable; Accounts Payable........................................27
        2.24   Voting Agreement; Proxies....................................................27
        2.25   Vote Required................................................................27
</TABLE>




                                       i
<PAGE>   5
                           TABLE OF CONTENTS (CONT'D)


<TABLE>
<S>                                                                                        <C>
        2.26   Board Approval...............................................................27
        2.27   No Existing Discussions......................................................27
        2.28   Year 2000 Compliance.........................................................27
        2.29   Disclosure...................................................................28
        2.30   Knowledge....................................................................28
        2.31   Material Adverse Effect......................................................28

3.      REPRESENTATIONS AND WARRANTIES OF PARENT AND NEWCO..................................28
        3.1    Organization and Good Standing...............................................29
        3.2    Power, Authorization and Validity............................................29
        3.3    No Conflict..................................................................30
        3.4    SEC Filings..................................................................30
        3.5    Proceedings; Orders..........................................................30
        3.6    No Material Adverse Change...................................................31
        3.7    No Brokers...................................................................31
        3.8    Disclosure...................................................................31
        3.9    Material Adverse Effect......................................................31
        3.10   Knowledge of Parent..........................................................31

4.      PRE-CLOSING COVENANTS OF THE COMPANY................................................31
        4.1    Advice of Changes............................................................31
        4.2    Maintenance of Business......................................................32
        4.3    Conduct of Business..........................................................32
        4.4    Approval of the Company's Stockholders.......................................34
        4.5    Proxy Statement..............................................................34
        4.6    Regulatory Approvals.........................................................35
        4.7    Acceleration of Company Options..............................................35
        4.8    Necessary Consents...........................................................35
        4.9    Proceedings and Orders.......................................................35
        4.10   No Other Negotiations........................................................35
        4.11   Access to Information........................................................36
        4.12   Satisfaction of Conditions Precedent.........................................36
        4.13   Securities Laws..............................................................36
        4.14   Notification of Employee Problems............................................36
        4.15   Company Dissenting Shares....................................................37
        4.16   Termination of Registration and Voting Rights................................37
        4.17   Invention Assignment and Confidentiality Agreements..........................37
        4.18   Company Employee Plans and Benefit Arrangements..............................37
        4.19   Takeover Statutes............................................................37
        4.20   Closing of Merger............................................................37
        4.21   Termination of Management Agreement..........................................38
</TABLE>




                                       ii

<PAGE>   6

                           TABLE OF CONTENTS (CONT'D)


<TABLE>
<S>                                                                                        <C>
5.      COVENANTS OF PARENT.................................................................38
        5.1    Advice of Changes............................................................38
        5.2    Satisfaction of Conditions Precedent.........................................38
        5.3    Regulatory Approvals.........................................................38

6.      CLOSING MATTERS.....................................................................38
        6.1    The Closing..................................................................38

7.      CONDITIONS TO OBLIGATIONS OF THE COMPANY............................................39
        7.1    Accuracy of Representations and Warranties...................................39
        7.2    Covenants....................................................................39
        7.3    Requisite Approvals..........................................................39
        7.4    Compliance with Law; No Legal Restraints; No Litigation......................39
        7.5    Government Consents; HSR Act Compliance......................................39
        7.6    Documents....................................................................40
        7.7    Opinion of Parent's Counsel..................................................40
        7.8    Agreements...................................................................40
        7.9    No Material Adverse Change...................................................40

8.      CONDITIONS TO OBLIGATIONS OF PARENT AND NEWCO.......................................40
        8.1    Accuracy of Representations and Warranties...................................40
        8.2    Covenants; No Material Adverse Change........................................40
        8.3    Compliance with Law; No Legal Restraints; No Litigation......................40
        8.4    Government Consents; HSR Act Compliance......................................41
        8.5    Opinion of the Company's Counsel.............................................41
        8.6    Requisite Approvals..........................................................41
        8.7    Restriction on Dissenting Shares.............................................41
        8.8    Documents....................................................................41
        8.9    Escrow Agreement.............................................................41
        8.10   Non-Competition Agreements...................................................41
        8.11   Continued Employment of Certain Personnel....................................41
        8.12   Resignation of Directors.....................................................42
        8.13   Due Diligence................................................................42

9.      TERMINATION.........................................................................42
        9.1    Termination..................................................................42
        9.2    Effect of Termination........................................................43
        9.3    Termination Fee..............................................................44
        9.4    Non-Exclusivity of Termination Rights........................................44

10.     SURVIVAL OF REPRESENTATIONS, INDEMNIFICATION AND REMEDIES,
        CONTINUING COVENANTS................................................................44
        10.1   Survival.....................................................................44
</TABLE>




                                      iii
<PAGE>   7
                           TABLE OF CONTENTS (CONT'D)



<TABLE>
<S>                                                                                        <C>
        10.2   Indemnification by Significant Stockholders..................................45
        10.3   Indemnification by Parent....................................................46
        10.4   Procedures...................................................................46
        10.5   Third-Party Claims...........................................................47
        10.6   Resolution of Conflicts: Arbitration.........................................48
        10.7   Other Indemnification Provisions.............................................49


11.     MISCELLANEOUS.......................................................................49
        11.1   Governing Law................................................................50
        11.2   Assignment; Successors and Assigns...........................................50
        11.3   Severability.................................................................50
        11.4   Counterparts.................................................................50
        11.5   Other Remedies...............................................................50
        11.6   Amendment and Waivers........................................................50
        11.7   No Waiver....................................................................50
        11.8   Expenses.....................................................................50
        11.9   Attorneys' Fees..............................................................51
        11.10  Notices......................................................................51
        11.11  Construction of Agreement....................................................51
        11.12  No Joint Venture.............................................................52
        11.13  Further Assurances...........................................................52
        11.14  Absence of Third Party Beneficiary Rights....................................52
        11.15  Public Announcement..........................................................52
        11.16  Confidentiality..............................................................52
        11.17  Time is of the Essence.......................................................52
        11.18  Disclosure Letter............................................................53
        11.19  Entire Agreement.............................................................53
        11.20  Submission to Jurisdiction; Waiver of Jury Trial.............................53
</TABLE>



                                       iv

<PAGE>   8

                                    Exhibits



    Exhibit A           Form of Articles of Merger

    Exhibit B           Form of Notes

    Exhibit C           Form of Voting Agreement

    Exhibit D           Form of Escrow Agreement

    Exhibit E           Form of Non-Competition Agreement

    Exhibit F           Form of Note and Security Agreement

    Schedule 1.3        Significant Stockholders

    Schedule 2.30       Knowledge of the Company and/or the Stockholders

    Schedule 7.7        Form of Opinion of Counsel to Parent and Newco

    Schedule 8.5        Form of Opinion of Counsel to the Company and the 
                        Stockholders

    Schedule 8.10       List of Parties Required to Enter into Non-Competition
                        Agreements

    Schedule 8.11       List of Company Employees Entering into Employment 
                        Agreements with Company





                                       v

<PAGE>   9


                      AGREEMENT AND PLAN OF REORGANIZATION



         This AGREEMENT AND PLAN OF REORGANIZATION (the "Agreement") is entered
into as of April 20, 1999 (the "Agreement Date"), by and among Tekelec, a
California corporation ("Parent"), Eagle Lonestar Corporation, a Delaware
corporation and a wholly-owned subsidiary of Parent ("Newco"), IEX Corporation,
a Nevada corporation (the "Company"), and Teknekron Partners II, IEX Partners,
Gary Crockett, and Stephen Lynn (collectively, the "Stockholders").

                                    RECITALS

         A. The parties intend that Newco, a new Delaware corporation that will
be organized as a wholly-owned subsidiary of Parent, will merge with and into
the Company in a reverse triangular merger (the "Merger"), with the Company to
be the surviving corporation of the Merger, all pursuant to the terms and
conditions of this Agreement, the Articles of Merger substantially in the form
of Exhibit A (the "Articles of Merger") and the provisions of applicable law.
Upon the effectiveness of the Merger, all the shares of common stock of the
Company ("Company Common Stock") that are outstanding immediately prior to the
effectiveness of the Merger, together with all outstanding unexercised Company
Options (as defined herein), will be converted into the right to receive an
amount of cash from Parent and, in certain circumstances, short term
subordinated notes issued by Parent in the form of Exhibit B (the "Notes") on
the basis determined herein and as provided in the Articles of Merger.

         B. The Board of Directors of the Company has approved the Merger, this
Agreement, the Articles of Merger and the transactions provided for herein and
therein.

         C. Each of the Significant Stockholders (as defined herein) is agreeing
to vote its shares in favor of the Merger, this Agreement, the Articles of
Merger and the transactions provided for herein and therein in a Voting
Agreement in substantially the form of Exhibit C hereto (the "Voting
Agreement"). The Significant Stockholders collectively own in excess of eighty
percent (80%) of the issued and outstanding capital stock of the Company.

         D. At or prior to the closing of the Merger and the transactions
contemplated herein (the "Closing"),

            1. Parent, the Representatives (as defined herein) and the Escrow
Agent (as defined herein) will enter into an Escrow Agreement in substantially
the form of Exhibit D hereto (the "Escrow Agreement");

            2. Parent, the Significant Stockholders and Harvey Wagner will enter
into Non-Competition Agreements in substantially the form of Exhibit E hereto
(the "Non-Competition Agreements");

            3. Company and certain employees of the Company will enter into
employment agreements; and

            4. Parent and the Significant Stockholders will enter into the Note
and Security Agreement in substantially the form of Exhibit F hereto.




<PAGE>   10

            In consideration of the foregoing and the representations,
warranties, covenants and agreements set forth in this Agreement, the parties
hereto agree as follows:

         1. PLAN OF REORGANIZATION

            1.1 The Merger. Subject to the terms and conditions of this
Agreement, at the Effective Time (as defined in Section 1.2), Newco shall be
merged with and into the Company (the "Merger"), the Company shall be the
surviving corporation (the "Surviving Corporation"), and the separate existence
of Newco shall thereupon cease. The Merger shall have the effect set forth in
applicable provisions of the Nevada Revised Statutes ("Nevada Law") and the
Delaware General Corporation Law ("Delaware Law"). Without limiting the
generality of the foregoing, at and after the Effective Time, the Surviving
Corporation shall possess the title to all real and other property owned by each
merging constituent entity; and be subject to all of the liabilities of each of
the constituent corporations in the Merger.

            1.2 Effective Time of the Merger. The Merger shall become effective
when properly executed Articles of Merger, in substantially the form attached
hereto as Exhibit A, or as otherwise agreed by the parties hereto and as
required by the relevant provisions of Nevada Law and Delaware Law, is duly
filed with the Secretaries of States of the States of Nevada and Delaware, which
filing shall be made in connection with the Closing of the transactions
contemplated herein in accordance with Article 6 upon satisfaction or waiver of
the conditions set forth in Articles 7 and 8. When used in this Agreement, the
term "Effective Time" shall mean the date and time at which such Articles of
Merger has been so filed or such later date as provided in the Articles of
Merger.

            1.3 Merger Consideration. The consideration to be paid by Parent in
exchange for the acquisition by Parent at the Effective Time of (i) all
outstanding Company Common Stock (including Dissenting Shares), (ii) that
certain option dated February 1, 1999 to purchase 700,000 shares of the
Company's Common Stock held by Teknekron Corporation (the "Teknekron Option";
the maximum number of shares for which such option is exercisable to be known as
the "Teknekron Shares") and (iii) all other outstanding Company Options (as
defined below) shall not exceed an amount equal to the Aggregate Merger
Consideration (as defined below) reduced by the aggregate exercise price of
Company Options bought out by Parent under Section 1.3(b). Subject to the terms
and conditions of this Agreement, as of the Effective Time, by virtue of the
Merger and without any action on the part of Newco, the Company, or the holder
of any shares of the Company Common Stock or the holder of any Company Options,
the following shall occur:

                (a) Consideration for Company Common Stock. Upon the terms and
subject to the conditions set forth below and throughout this Agreement,
including, without limitation, the escrow provisions set forth in Section 1.5
and Article 10 hereof, each share of Company Common Stock issued and outstanding
immediately prior to the Closing other than any Company Dissenting Shares (as
defined and to the extent provided in Section 1.4) will be canceled and
extinguished and be converted automatically into the right to receive upon
surrender of the certificate representing such share of Company Common Stock in
the manner provided in Section 1.5, without interest:

                    (i) for each share of Company Common Stock owned by a
Company stockholder who is not a Significant Stockholder (as defined below),
cash in the



                                       2
<PAGE>   11

amount of the Per Share Payment, as defined below (the aggregate consideration
paid under this Section 1.3(a)(i) to all holders of Company Common Stock (other
than Significant Stockholders) plus the amount payable to such holders who hold
Company Dissenting Shares, is herein referred to as the "Minority
Consideration"); or

                    (ii) for each share of Company Common Stock owned by a
Company stockholder listed in Schedule 1.3 (a "Significant Stockholder"), the
sum of (A) the Per Share Note Amount (as defined below) payable by Note, and (B)
cash (the "Significant Stockholder Per Share Cash Amount") equal to the quotient
obtained by dividing the remainder of the Aggregate Cash Amount less (i) the
Minority Consideration and (ii) the amount of the Option Payment allocated to
holders of Company Common Stock (other than Significant Stockholders), by the
aggregate number of shares of Company Common Stock or subject to Company Options
(including Teknekron Options) which are bought out by Parent under Section
1.3(b) held or owned by the Significant Stockholders, with such sum of (A) and
(B) to be subject to reduction by the Escrow Amount attributable to such
Significant Stockholder as provided in Section 1.5; and

                    (iii) for each share of Company Common Stock owned by any
Company stockholder, which share was purchased by a promissory note ("Promissory
Note") from such Company stockholder to the Company, the Parent may reduce the
per share amount payable to such stockholder by an amount equal to the quotient
of (A) the amount, if any, outstanding as of the Closing under such Promissory
Note and (B) the number of shares of Company Common Stock purchased with such
Promissory Note, and the Parent shall pay the Company the amount of such
reduction in order to pay down the Promissory Note on behalf of such
stockholder.

                (b) Treatment of Stock Options. To the extent any option
(including the Teknekron Option) or other right to purchase shares of Company
Common Stock (each such option, including the Teknekron Option, is herein
referred to as a "Company Option") then outstanding either under the Company's
1996 Stock Incentive Plan (the "Option Plan") or otherwise has not been
exercised in full and is outstanding immediately prior to the Closing, Parent
will buy out and cancel such Company Option at the Closing by paying, with
respect to each share of Company Common Stock for which such Company Option is
exercisable: (i) if such Company Option is held by a Significant Stockholder, an
amount equal to the sum of (x) the Per Share Note Amount plus (y) the
Significant Stockholder Per Share Cash Amount less the per share exercise price
payable with respect to such Company Option; and (ii) if such Company Option is
not held by a Significant Stockholder, an amount equal to the Per Share Payment
less the per share exercise price payable with respect to such Company Option.
The Company shall notify the Parent of the amount of the Option Payment and
provide such other information requested by the Parent with respect thereto on
or before the Closing.

                (c) Conversion of Newco Shares. Each share of Newco Common
Stock, par value $0.001 per share ("Newco Common Stock"), that is issued and
outstanding immediately prior to the Effective Time will, by virtue of the
Merger and without further action on the part of the sole stockholder of Newco,
be converted into and become one share of Company Common Stock that is issued
and outstanding immediately after the Effective Time, and the shares of Company
Common Stock into which the shares of Newco Common Stock are



                                       3
<PAGE>   12

so converted shall be the only shares of Company Common Stock that are issued
and outstanding immediately after the Effective Time.

                (d) Adjustments to Consideration. Any payment made under this
Section 1.3 shall be adjusted proportionally to reflect fully the effect of any
stock split, reverse split, stock dividend (including any dividend or
distribution of securities convertible into Company Common Stock),
reorganization, capitalization or other like change with respect to Company
Common Stock occurring after the Agreement Date and prior to the Effective Time.

                (e) Definitions.

                    (i) "Aggregate Cash Amount" means $63,000,000.

                    (ii) "Aggregate Note Amount" means $100,000,000.

                    (iii) "Aggregate Merger Consideration" means the sum of the
Aggregate Cash Amount and the Aggregate Note Amount.

                    (iv) "Option Payment" means that amount equal to the number
of shares of Company Common Stock subject to Company Options which are bought
out by Parent under Section 1.3(b) multiplied by the Per Share Payment.

                    (v) "Per Share Note Amount" means the quotient obtained by
dividing the Aggregate Note Amount by the sum of (A) the shares of Common Stock
owned by the Significant Stockholders immediately prior to the Closing, and (B)
the number of shares of Company Common Stock (including the Teknekron Shares)
subject to Company Options held by Significant Stockholders which are bought out
by Parent under Section 1.3(b).

                    (vi) "Per Share Payment" means the quotient obtained by
dividing the Aggregate Merger Consideration by the sum of (A) the number of
shares of Company Common Stock outstanding immediately prior to the Closing that
are held by all stockholders of the Company, and (B) the number of shares of
Company Common Stock (including the Teknekron Shares) subject to Company Options
bought out by Parent under Section 1.3(b). To determine the amount of
consideration payable to a particular stockholder or option holder under this
Section 1.3, the Per Share Payment shall be multiplied by the number of shares
of Company Common Stock held by such stockholder or subject to an unexercised
Company Option, as the case may be, and in the case of Company Common Stock that
has been purchased by such stockholder with a Promissory Note, reduced by the
amount the Parent pays down the outstanding balance of such Promissory Note
under Section 1.3(a)(iii) on behalf of such stockholder and in the case of
unexercised Company Option reduced by the aggregate exercise price payable with
respect to such Company Option and then rounded to the nearest whole cent.

            1.4 Company Dissenting Shares. Holders of Company Dissenting Shares
(if any) will be entitled to their appraisal rights under Section 92A.300 et
seq. of Nevada Law with respect to such Company Dissenting Shares and such
Company Dissenting Shares will not be converted into the right to receive
consideration in the Merger as provided in Section 1.3; provided, however, that
nothing in this Section 1.4 is intended to remove, release, waive, alter or
affect any of the conditions to Parent's and Newco's obligations to consummate
the Merger set forth in Sections 8.6 and 8.7, or any other provision of this
Agreement relating to Company



                                       4
<PAGE>   13


Dissenting Shares. Shares of the capital stock of the Company that are
outstanding immediately prior to the Effective Time and with respect to which
dissenting stockholders' rights of appraisal under Nevada Law have either (a)
not been properly exercised and perfected or (b) with the consent of the Company
and Parent, been withdrawn, will, when such dissenting stockholders' rights can
no longer be legally exercised under Nevada Law, be converted into the right to
receive the Merger consideration as provided in Section 1.3. "Company Dissenting
Shares" means any shares of any capital stock of the Company that (i) are
outstanding immediately prior to the Effective Time and (ii) with respect to
which dissenter's rights to obtain payment for such dissenting shares in
accordance with Section 9A.300 et seq. of Nevada Law have been duly and properly
exercised and perfected in connection with the Merger.

            1.5 Surrender of Certificates and Establishment of Escrow.

                (a) Escrow Agent. Prior to the Effective Time, Parent shall
designate State Street Bank and Trust Company of California, N.A. to act as
escrow agent ( the "Escrow Agent") in the Merger.

                (b) Establishment of Escrow. On the business day in which the
Closing occurs, Parent shall withhold and deposit into an escrow account Notes
(the "Escrow Notes") in the aggregate principal amount equal to ten percent
(10%) of the gross amount payable (before any reduction or offset for Escrow
Amount, Promissory Notes paid down by the Parent under Section 1.3(a)(iii) or
exercise price of Company Options which are bought out by Parent under Section
1.3(b), to the extent applicable to the Significant Stockholders) to the
Significant Stockholders under Section 1.3 (the "Escrow Amount"). Pursuant to
the Escrow Agreement, Parent will deduct from the amounts otherwise deliverable
to each Significant Stockholder and deposit with the Escrow Agent the Escrow
Amount solely from the consideration payable to the Significant Stockholders,
allocated proportionately according to the gross consideration payable to each
Significant Stockholder under Section 1.3 in exchange for (i) outstanding shares
of Company Common Stock and (ii) unexercised Company Options held by such
Significant Stockholder. The Escrow Amount shall be administered in accordance
with the provisions of Article 10 and the Escrow Agreement.

                (c) Exchange Procedures. Prior to the Closing, Parent shall
cause to be delivered to each Company stockholder (i) a letter of transmittal
(which shall specify that delivery shall be effected, and risk of loss and title
to the Company stock or option certificates ("Certificates") owned by such
holder shall pass, only upon delivery of the Certificates owned by such holder
to Parent, and shall be in such form and have such other provisions as Parent
may reasonably specify), and (ii) instructions for use in effecting the
surrender of such holder's Certificates in exchange for the consideration
payable under Section 1.3. Upon surrender of a Certificate for cancellation to
Parent, together with such letter of transmittal, duly completed and validly
executed in accordance with the instructions thereto, the holder of such
Certificate shall be entitled to receive in exchange therefor, at the Closing,
the consideration (subject to the escrow provisions hereof and in Article 10),
to which such holder is entitled pursuant to Section 1.3, and the Certificate so
surrendered shall forthwith be canceled. Payments of cash to stockholders
pursuant to this Section 1.5 shall be made by wire transfer of immediately
available funds to a single disbursing agent to be designated by the
Representatives not less than three (3) business days prior to the Closing.
Notwithstanding any other provision of this Agreement, any payment due under
Section 1.3 may be reduced to the extent of any withholding taxes.




                                       5
<PAGE>   14

                (d) Payments With Respect to Unexchanged Shares. No interest
shall accrue or be payable with respect to the Merger consideration payable on
any unexchanged shares of Company Common Stock.

                (e) No Liability. Notwithstanding anything to the contrary in
this Section 1.5, none of the Parent, the Surviving Corporation or any party
hereto shall be liable to a holder of a Certificate for any amount properly paid
to a public official pursuant to any applicable abandoned property, escheat or
similar law.

            1.6 No Further Ownership Rights in Company Common Stock. All amounts
paid upon the surrender for exchange of shares of Company Common Stock and
Company Options in accordance with the terms hereof shall be deemed to have been
issued in full satisfaction of all rights pertaining to such shares of Company
Common Stock and Company Options and there shall be no further registration of
transfers on the records of the Surviving Corporation of shares of Company
Common Stock or Company Options which were outstanding immediately prior to the
Effective Time. Until so surrendered, each outstanding Certificate that, prior
to the Effective Time, represented shares of Company Common Stock or Company
Options will be deemed from and after the Effective Time, for all corporate
purposes, to evidence only the right to receive the consideration payable under
Section 1.3 in respect of each such share or option, as the case may be,
(subject to the escrow provisions set forth in Section 1.5 and Article 10
hereof). If, after the Effective Time, Certificates are presented to the
Surviving Corporation for any reason, they shall be canceled and the
consideration payable under Section 1.3 shall be delivered to the person
entitled thereto (subject to the escrow provisions set forth in Section 1.5 and
Article 10 hereof).

            1.7 Lost, Stolen or Destroyed Certificates. In the event any
Certificates shall have been lost, stolen or destroyed, Parent shall issue in
exchange for such lost, stolen or destroyed Certificates, upon the making of an
affidavit of that fact by the holder thereof, such amount of cash and Notes as
may be required pursuant to Section 1.3; provided, however, that Parent may, in
its reasonable discretion and as a condition precedent to the issuance thereof,
require the owner of such lost, stolen or destroyed Certificates to deliver a
bond in such sum or provide such other assurances as it may reasonably direct as
indemnity against any claim that may be made against Parent with respect to the
Certificates alleged to have been lost, stolen or destroyed.

            1.8 Stockholder Representatives. By their approval of the Merger,
the Significant Stockholders will be conclusively and irrevocably deemed to have
consented to, approved and agreed to be personally bound by: (i) the
indemnification provisions of Article 10; (ii) the Escrow Agreement; (iii) the
appointment of Thomas S. Loo and Gary Crockett as the representatives of the
Significant Stockholders (the "Representatives") under the Escrow Agreement and
as the attorney-in-fact and agent for and on behalf of each Significant
Stockholder as provided in the Escrow Agreement; and (iv) the taking by the
Representatives of any and all actions and the making of any decisions required
or permitted to be taken by the Representatives under this Agreement and/or the
Escrow Agreement, including, without limitation, the exercise of the power to:
(a) authorize delivery to Parent of all or some of the Escrow Amount in
satisfaction of indemnity claims by Parent or any other Indemnified Party (as
defined in Section 10.2) pursuant to Article 10 and/or the Escrow Agreement; (b)
agree to, negotiate, enter into settlements and compromises of, demand
arbitration of, and comply with



                                       6
<PAGE>   15


orders of courts and awards of arbitrators with respect to, such claims; (c)
arbitrate, resolve, settle or compromise any claim for indemnity made pursuant
to Article 10; and (d) take all actions necessary in the judgment of the
Representatives for the accomplishment of the foregoing. Parent shall, at its
sole option and discretion, be entitled to condition the issuance of any of the
Escrow Amount to a Significant Stockholder pursuant to Section 1.3 on its
receipt of a written instrument executed by such Significant Stockholder,
customary in form and substance and reasonably acceptable to Parent,
acknowledging and agreeing to the foregoing. The Representatives will have
authority and power to act on behalf of each Significant Stockholder with
respect to the Escrow Agreement and the disposition, settlement or other
handling of all claims under Article 10 hereof or governed by the Escrow
Agreement, and all rights or obligations arising under the Escrow Agreement so
long as all Significant Stockholders are treated in the same manner. The
Significant Stockholders will be bound by all actions taken and documents
executed by the Representatives in connection with the Escrow Agreement, and
Parent will be entitled to rely on any action or decision of the
Representatives. In the event of a disagreement between the Representatives,
they shall act in accordance with the vote of a Majority In Interest of the
Significant Stockholders. A "Majority In Interest" of the Significant
Stockholders means Significant Stockholders holding greater than fifty percent
(50%) of the Company Common Stock and Company Options, or securities convertible
therefor, immediately prior to the Effective Time. In performing the functions
specified in this Agreement and the Escrow Agreement, the Representatives will
not be liable to any Significant Stockholder in the absence of gross negligence
or willful misconduct on the part of either of the Representatives. Any
out-of-pocket costs and expenses reasonably incurred by the Representatives in
connection with actions taken pursuant to the terms of the Escrow Agreement will
be paid by the Significant Stockholders to the Representatives, first, out of
the interest accrued on the Escrow Notes and second, out of the Escrow Amount
pro rata in proportion to their respective percentage interests in the Escrow
Amount, but only to the extent that any of the Escrow Amount remains available
for distribution to the Significant Stockholders following expiration of the
Escrow Period and satisfaction of all claims made or asserted by Parent or any
Indemnified Person under Article 10 or the Escrow Agreement, in all cases
subject to Parent's rights in and to the Escrow Amount.

            1.9 Additional Effects of the Merger. At and subject to and upon the
Effective Time: (a) the Articles of Incorporation and Bylaws of the Company will
be amended and restated (in a form to be delivered to the Company prior to the
Effective Time) immediately after the Effective Time until duly amended in
accordance with the terms thereof and applicable law; and (b) the Board of
Directors and executive officers of Parent will remain unchanged, the sole
director of Newco immediately prior to the Effective Time will become the sole
director of the Surviving Corporation and the officers of Newco immediately
prior to the Effective Time will become the officers of the Surviving
Corporation.

            1.10 Further Assurances. The Company agrees that if, at any time
after the Effective Time, Parent considers or is advised that any further
instruments, deeds, assignments or assurances are reasonably necessary or
desirable to vest, perfect or confirm in the Surviving Corporation title to any
property or rights of the Company as provided herein, then Parent, the Surviving
Corporation and their respective officers and directors are hereby authorized by
the Company to execute and deliver all such proper instruments, deeds,
assignments and assurances and do all other things necessary or desirable to
vest, perfect or confirm title to such property or



                                       7
<PAGE>   16


rights in Parent and otherwise to carry out the purposes of this Agreement, in
the name of the Company or otherwise.

         2. REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE STOCKHOLDERS

            The Company and the Stockholders hereby severally represent and
warrant to Parent and Newco that, except as set forth in the Company disclosure
letter delivered by the Company to Parent prior to the execution of this
Agreement (the "Company Disclosure Letter"; for all purposes of this Agreement,
the statements contained in the Company Disclosure Letter shall also be deemed
to be representations and warranties made and given by the Company and the
Stockholders under Article 2 of this Agreement), including items in the Company
Disclosure Letter referred to as "Items" below, each of the following
representations, warranties and statements in this Article 2 are true and
accurate as of the Agreement Date and will be true and accurate as of the
Closing Date:

            2.1 Organization and Good Standing; Title.

                2.1.1 Organization and Good Standing. The Company is a
corporation duly organized, validly existing and in good standing under Nevada
Law, has the requisite corporate power and authority to own, operate and lease
its properties and to carry on its business as now conducted and is duly
qualified or licensed as a foreign corporation in each jurisdiction listed on
Item 2.1.1, which is each jurisdiction in which the failure to so qualify would
have a Material Adverse Effect on the Company. The Company has no subsidiaries
and has never had any subsidiaries. The Company has never conducted directly or
through any subsidiary any business under or otherwise used, for any purpose or
in any jurisdiction, any fictitious name, assumed name, trade or other name. The
Company has heretofore delivered to Parent true and complete copies of its
Articles of Incorporation and Bylaws. The Company is not in violation of any of
the provisions of the Articles of Incorporation or Bylaws of the Company or of
any resolution adopted by the stockholders of the Company or the Boards of
Directors of the Company, and to the best knowledge of the Company, no event has
occurred, and no condition or circumstance exists, that likely would (with or
without notice or lapse of time) constitute or result directly or indirectly in
such a violation.

                2.1.2 Board of Directors and Officers. Item 2.1.2 accurately
sets forth (i) the names of the members of the Company's Board of Directors,
(ii) the names and titles of the Company's officers and (iii) the names of the
members of the committees of the Company's Board of Directors.

                2.1.3 No Cessation of Business. There is no proceeding pending
or any election or action contemplating, the dissolution or liquidation of the
Company or the winding up or cessation of the Company's business or affairs.

                2.1.4 Title. Except as set forth in Item 2.1.4, each Company
stockholder owns and holds good and valid title to such Company stockholder's
Company Common Stock to be exchanged in the Merger, free and clear of any
pledges, claims, liens, charges, encumbrances, security interests of any kind or
nature whatsoever and free of any other limitation or restriction (including any
restriction on the right to vote, sell or otherwise dispose of such Company
Common Stock). No Company stockholder has any interest or right in the equity or
assets of the



                                       8
<PAGE>   17


Company other than the Company Common Stock owned by such Company stockholder to
be exchanged in the Merger.

            2.2 Power, Authorization and Validity.

                2.2.1 Power and Authority. The Company has the corporate right,
power and authority to enter into and perform its obligations under this
Agreement and all agreements to which the Company is or will be a party that are
required to be executed pursuant to this Agreement (the "Company Ancillary
Agreements") and the transactions contemplated hereby and thereby. This
Agreement and the Company Ancillary Agreements have been duly and validly
authorized by all necessary corporate action on the part of the Company, subject
to obtaining the requisite approval of the Company's stockholders in connection
with the consummation of the Merger. Each Stockholder has the legal power and
capacity to enter into and perform its obligations under this Agreement and all
agreements to which such Stockholder is or will be a party that are required to
be executed pursuant to this Agreement (the "Stockholder Ancillary Agreements")
and the transactions contemplated hereby and thereby.

                2.2.2 No Consents. No filing, authorization, approval or
consent, governmental or otherwise, is necessary to enable the Company or the
Stockholders to enter into, and to perform their respective obligations under,
this Agreement, the Company Ancillary Agreements and the Stockholder Ancillary
Agreements, except for (a) the filing of the Articles of Merger with the
Secretaries of State of the States of Nevada and Delaware, the filing of such
officers' certificates and other documents as are required to effectuate the
Merger under Nevada Law and Delaware Law and the filing of appropriate documents
with the relevant authorities of the states in which the Company is qualified or
licensed to do business, (b) such filings as may be required to comply with
federal and state securities laws, (c) filings required under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the rules
and regulations thereunder (the "HSR Act") and the expiration of applicable
waiting periods under the HSR Act and (d) consents required under agreements set
forth in Item 2.5 as exceptions to the representation made in the second
sentence of Section 2.5.

                2.2.3 Enforceability. This Agreement and the Company Ancillary
Agreements are, or when executed and delivered by the Company and the other
parties thereto will be, valid and binding obligations of the Company
enforceable against the Company in accordance with their respective terms,
except as to the effect, if any, of (a) applicable bankruptcy and other similar
laws affecting the rights of creditors generally and (b) rules of law governing
specific performance, injunctive relief and other equitable remedies; provided,
however, that the Company Ancillary Agreements will not be effective until the
earlier of the Effective Time or the date provided for therein. This Agreement
and the Stockholder Ancillary Agreements are, or when executed and delivered by
the respective Stockholders and the other parties thereto will be, valid and
binding obligations of such Stockholders enforceable against such Stockholders
in accordance with their respective terms, except as to the effect, if any, of
(a) applicable bankruptcy and other similar laws affecting the rights of
creditors generally and (b) rules of law governing specific performance,
injunctive relief and other equitable remedies; provided, however, that the
Stockholder Ancillary Agreements will not be effective until the earlier of the
Effective Time or the date provided for therein.




                                       9
<PAGE>   18

            2.3 Capitalization.

                2.3.1. Authorized/Outstanding Capital Stock. Set forth in Item
2.3.1 is the authorized capital stock of the Company and the shares of Company
Common Stock issued and outstanding as of the Agreement Date and updated as of
the Closing Date. No fractional shares of Company Common Stock are issued or
outstanding and the Company holds no treasury shares. All issued and outstanding
shares of the Company's capital stock have been duly authorized and validly
issued, are fully paid and nonassessable, are not subject to any claim, lien,
security interest, preemptive right, right of first refusal, right of first
offer or right of rescission, and have been offered, issued, sold and delivered
by the Company in compliance with all registration or qualification requirements
(or applicable exemptions therefrom) of all applicable federal and state
securities laws. A true and complete list of all holders of the Company's
outstanding capital stock, and the total number of shares of Company Common
Stock owned by each such holder as of the Agreement Date and updated as of the
Closing Date is set forth in Item 2.3.1. Except as set forth in Item 2.3.1, no
stockholder of the Company owes the Company any money or other consideration
representing any part of the purchase price of any outstanding shares of the
Company's capital stock, including without limitation any money due under a
promissory note payable to the Company. The Company has no liability to any
stockholder for any dividends that have been declared or accrued.

                2.3.2 Options/Rights. The Company Options each set forth on
Section 2.3.2, were each duly authorized and validly issued and, with respect to
all the Company Options (other than the Teknekron Option) validly issued under
the Option Plan. A true and complete list of all holders of Company Options that
are outstanding on the Agreement Date, the number of Company Options held by
each such holder, the exercise price and vesting schedule of each Company Option
held by each such person and the name of the Stock Plan under which each such
option was granted is set forth in Item 2.3.2. All Company Options shall be duly
and validly accelerated prior to the Effective Time. Except for the Company
Options as of the date of the Agreement, there are no other stock appreciation
rights, options, warrants, convertible securities or other securities, calls,
commitments, conversion privileges or preemptive or other rights or agreements
outstanding to purchase or otherwise acquire (whether directly or indirectly)
any of the Company's authorized but unissued capital stock; and there are no
stock appreciation rights, options, warrants, convertible securities or other
securities, calls, commitments, conversion privileges or preemptive or other
rights or agreements to which the Company is a party involving the purchase or
other acquisition (whether directly or indirectly) of any shares of the
Company's capital stock. The Company has no liability for dividends accrued but
unpaid and there are no voting agreements, voting trusts, registration rights,
rights of first refusal or other restrictions (other than normal restrictions on
transfer under applicable federal and state securities laws) applicable to any
of the Company's outstanding securities. There are no bonds, debentures, notes
or other indebtedness of the Company having the right to vote (or convertible
into, or exchangeable for, securities having the right to vote) on any matters
on which stockholders of the Company may vote.

            2.4 Subsidiaries. The Company has no subsidiaries. Except as set
forth in Item 2.4, the Company does not own, directly or indirectly, any equity
interest in any corporation, partnership, joint venture or other business
entity.




                                       10
<PAGE>   19

            2.5 No Conflict. Neither the execution and delivery of this
Agreement, any Company Ancillary Agreement or any Stockholder Ancillary
Agreement, nor the consummation of the transactions provided for herein or
therein, will conflict with, or (with or without notice or lapse of time, or
both) result in a termination, breach, impairment or violation of, (a) any
provision of the Articles of Incorporation or Bylaws of the Company as currently
in effect, (b) any note, bond, lease, mortgage, indenture, license, franchise,
permit, agreement, Contract (as defined in Section 2.11) or other instrument or
obligation (whether oral or in writing) to which the Company or a Stockholder is
a party or by which the Company or a Stockholder is bound or affected which
termination, breach, impairment or violation would have a Material Adverse
Effect on the Company or (c) any federal, state, local or foreign Order (as
defined in Section 2.6.2), statute, rule, regulation or ordinance applicable to
the Company or any of their respective assets or properties. The consummation of
the Merger by the Company will not require any consent, release, waiver or
approval other than (i) the approval of the Company's stockholders and (ii) the
expiration of any applicable waiting periods regarding the Merger under the HSR
Act, and will not materially adversely affect any of the rights, licenses,
permits, franchises, leases, agreements or Contracts of the Company set forth in
Item 2.11 pursuant to their terms other than as set forth in Item 2.5. Neither
the Company's nor the Stockholders' entering into this Agreement nor the
consummation of the Merger will give rise to or trigger the application of, any
right of any third party that has not been waived by such third party in a
writing signed by it.

            2.6 Proceedings; Orders.

                2.6.1 Except as set forth in Item 2.6, there is no pending
action, suit, litigation, arbitration, proceeding (including any civil,
criminal, administrative, investigative or appellate proceeding and any informal
proceeding), prosecution, contest, hearing, inquiry, inquest, audit, examination
or investigation, commenced, brought, conducted or heard by or before, or that
otherwise has involved, any Governmental Body, arbitrator, arbitration panel or
mediator ("Proceeding"), and to the best knowledge of the Company, no person or
entity has threatened to commence any Proceeding: (i) that involves the Company
or that otherwise relates to or likely would affect the Company's businesses or
any of the assets or properties owned or used by the Company (whether or not the
Company is named as a party thereto), except in each case for threatened
Proceedings that would not, individually or in the aggregate, have a Material
Adverse Effect on the Company; or (ii) that challenges, or that may have the
effect of preventing, delaying, making illegal or otherwise interfering with,
any of the transactions that are provided for in this Agreement, the Articles of
Merger, the Company Ancillary Agreements, the Stockholder Ancillary Agreements,
the Parent Ancillary Agreements (as defined below) or the Newco Ancillary
Agreements (as defined below) (all such transactions, the "Transactions"). For
purposes of this Agreement, "Parent Ancillary Agreements" shall mean all
agreements to which Parent is or will be a party that are required to be
executed pursuant to this Agreement, and "Newco Ancillary Agreements" shall mean
all agreements to which Newco is or will be a party that are required to be
executed pursuant to this Agreement. The Company has delivered to Parent true
and complete copies of all pleadings, material correspondence and other written
materials to which the Company has access that relate to the Proceedings
identified in Item 2.6. "Governmental Body" shall mean any: (a) nation,
principality, state, commonwealth, province, territory, county, municipality,
district or other jurisdiction of any nature; (b) federal, state, local,
municipal, foreign or other government; (c) governmental or quasi-governmental
authority of



                                       11
<PAGE>   20


any nature (including any governmental division, subdivision, department,
agency, bureau, branch, office, commission, council, board, instrumentality,
officer, official, representative, organization, unit, body or entity and any
court or other tribunal); (d) multinational organization or body; or (e)
individual, entity or body exercising, or entitled to exercise, any executive,
legislative, judicial, administrative, regulatory, police, military or taxing
authority or power of any nature.

                2.6.2 There is no order, judgment, injunction, edict, decree,
ruling, pronouncement, determination, decision, opinion, verdict, sentence,
subpoena, writ or award that is or has been issued, made, entered, rendered or
otherwise put into effect by or under the authority of any court, administrative
agency or Governmental Body, arbitrator, arbitration panel or mediator
("Order"), or proposed Order, expressly applicable to the Company or any of the
assets or properties owned or used by the Company that (i) likely would have a
Material Adverse Effect on the Company, or adversely affect the ability of the
Company to comply with or perform any covenant or obligation under this
Agreement, the Articles of Merger, the Company Ancillary Agreements, the
Stockholder Ancillary Agreements, the Parent Ancillary Agreements or the Newco
Ancillary Agreements (the "Transactional Agreements"); or (ii) may have the
effect of preventing, delaying, making illegal or otherwise interfering with any
of the Transactions.

                2.6.3 To the best knowledge of the Company, no officer or
employee of the Company is subject to any Order that prohibits such officer or
employee from engaging in or continuing any conduct, activity or practice
relating to the Company's business.

                2.6.4 Except as set forth in Item 2.6.4, to the best knowledge
of the Company, no event has occurred, and no claim, dispute or other condition
or circumstance exists, that would reasonably be expected to cause or provide a
basis for a director, officer, employee or other representative of the Company
to seek indemnification from, or commence a Proceeding against or involving the
Company.

            2.7 Company Financial Statements. The Company has delivered to
Parent the Company's audited balance sheet as of December 31, 1998 (the "Balance
Sheet Date"), unaudited balance sheet as of March 31, 1999, and related
statement of operations, statement of stockholders' equity and statement of cash
flows for the year ended December 31, 1998 and for the quarter ended March 31,
1999 (collectively, the "Company Financial Statements"). Except as set forth in
Item 2.7, each of the Company Financial Statements is derived from and in
accordance with the books and records of the Company and has been prepared in
conformity with GAAP consistent with prior periods, except as indicated in the
notes thereto, except that unaudited financial statements may not contain
footnotes and are subject to normal and recurring year-end audit adjustments.
The balance sheet as of the Balance Sheet Date presents fairly and accurately in
all material respects the position of the Company at such date, and the related
statements of the Company for the specified period then ended present fairly and
accurately in all respects the results of operations and cash flows of the
Company for such period. For the purposes of this Agreement, all Company
Financial Statements referred to in this paragraph shall include any notes or
schedules to such Company Financial Statements. Except as set forth in Item 2.7,
at the Agreement Date the Company has no debt, liability or obligation of any
nature, whether accrued, absolute, contingent or otherwise, and whether due or
to become due, that is in excess of $50,000 in any one case or $250,000 in the
aggregate, that is not reflected, reserved



                                       12
<PAGE>   21


against or disclosed in the Company Financial Statements. All reserves
established by the Company and set forth in or reflected in the Company
Financial Statements were adequate as of the date thereof, and to the best
knowledge of the Company, are adequate. At the Balance Sheet Date, there were no
material loss contingencies (as such term is used in Statement of Financial
Accounting Standards No. 5 issued by the Financial Accounting Standards Board in
March 1975) that are not adequately provided for in the Company Financial
Statements as required by said Statement No. 5.

            2.8 Taxes. The Company has filed all federal, state, local and
foreign Tax and information returns and reports required to be filed prior to
the Agreement Date, has paid all Taxes required to be paid in respect of all
periods prior to the Agreement Date for which returns have been filed, has made
all necessary estimated Tax payments, and has no liability for Taxes in excess
of the amounts so paid, except to the extent adequate reserves have been
established in the Company Financial Statements. All such returns and reports
filed by the Company were accurate in all material respects as of their
respective dates. True and complete copies of all Tax and information returns
and reports filed by the Company for the last three years have been provided or
made available by the Company to Parent. The Company is not delinquent in the
payment of any Tax or in the filing of any Tax returns or reports, and no
deficiencies for any Tax have been threatened, claimed, proposed or assessed
that have not been settled or paid. Except as set forth in Item 2.8, no Tax
return of the Company has ever been audited by the Internal Revenue Service or
any Governmental Body or state or other national taxing agency or authority. The
Company has made (A) accruals for Taxes on the balance sheet as of the Balance
Sheet Date and (B) with respect to periods after the Balance Sheet Date,
provisions on a periodic basis consistent with past practice on the Company's
books and records or financial statements, in each case which are adequate to
cover any Tax liability of the Company determined in accordance with GAAP
through the Balance Sheet Date or the date of the provision, as the case may be,
except where failures to make such accruals or provisions could not reasonably
be expected to have, individually or in the aggregate, a material Adverse Effect
on the Company. The Company is not a party to any agreement with a party other
than the Company or providing for the allocation or payment of Tax liabilities
or payment for Tax benefits with respect to a consolidated, combined or unitary
return which return includes or included the Company. The Company has never been
a member of an affiliated group of corporations within the meaning of Section
1504 of the Code. The Company has not agreed to make nor is it required to make
any adjustment under Section 481(a) of the Code by reason of a change in
accounting method or otherwise. The Company is not, and has not at any time
been, a "United States Real Property Holding Corporation" within the meaning of
Section 897(c)(2) of the Code. The Company has not made any payments, is not
obligated to make any payments, is not a party to any agreement that under
certain circumstances could obligate it to make any payments, and has not
entered into any transaction, including but not limited to the acceleration of
Company options, that will not be deductible under Section 280G of the Code or
would subject the Company to an excise tax under Section 280G of the Code,
except for payments which will be cured by stockholder approval and are set
forth in Item 2.8. The Company has no current or deferred federal income Tax
liabilities, other than as disclosed in the Company Financial Statements, and
will not as a result of the Merger become liable for any income Tax not
adequately reserved against on the Company Financial Statements. The Company has
not filed a consent pursuant to Section 341(f) of the Code or agreed to have
Section 341(f)(2) of the Code apply to any disposition of a subSection (f) asset
(as defined in Section 341(f)(4) of the Code) owned by the Company. The Company
has



                                       13
<PAGE>   22


not executed or requested any waiver of any statute of limitation, or extending
the period for, the collection or assessment of any Tax. If the Company becomes
subject to an audit by the Internal Revenue Service or any state or other
national taxing agency or authority for tax years or periods prior to the
Effective Time (including, but not limited to, any short tax year resulting from
the Merger), the Stockholders will be responsible for such audit(s) and shall
resolve all such audits in a manner consistent with the intentions of the
Company and Parent as expressed in this Agreement, provided Parent shall provide
notice of any such audit and access to all relevant books and records and shall
cooperate fully and in good faith with the Stockholders in connection with such
audits. The terms "Tax" and "Taxes" include all federal, state, local and
foreign income, gains, franchise, excise, property, sales, use, employment,
license, payroll, occupation, recording, value added or transfer taxes,
governmental charges, fees, levies or assessments (whether payable directly or
by withholding), and, with respect to such taxes, any estimated tax, interest
and penalties or additions to tax and interest on such penalties and additions
to tax.

            2.9 Title to Properties. Item 2.9 sets forth a true and complete
list and brief description of each item of real and personal property owned or
leased by the Company having a value in excess of $2,500. The Company has good
and marketable title to, or a valid leasehold interest in, as applicable, all of
the assets reflected on the Company Financial Statements, free and clear of all
liens, security interests, mortgages, pledges, claims, charges, interests, or
encumbrances of any kind other than as set forth on Item 2.9 or assets that are
subject to capitalized leases. Except as set forth in Item 2.9, there are no UCC
or other financing statements, mortgages, assignments or other documents or
instruments on record with the State of Nevada or any other Governmental Body or
authority naming the Company or any of its subsidiaries as debtor. Such assets
and those set forth in Item 2.13.6 (A) are in all material respects in good
operating condition and repair, normal wear and tear excepted, and (B)
constitute all material properties, interests, assets and rights held for use or
used in connection with the business of the Company and constitute all those
necessary to continue to operate the business of the Company consistent with
current practice. All leases of real or personal property to which the Company
is a party are in full force and effect and afford the Company or such
subsidiary peaceful and undisturbed possession of the subject matter of the
lease. The Company does not own any real property. The Company is not in
violation of any material zoning, building, safety or environmental ordinance,
regulation or requirement or other law or regulation applicable to the operation
of owned or leased properties, and the Company has not received any notice of
such violation with which it has not complied or had waived.

            2.10 Absence of Certain Changes. Since the Balance Sheet Date, the
Company has carried on its business in the ordinary course in accordance with
the procedures and practices in effect on the Balance Sheet Date, and except as
set forth in Item 2.10, since the Balance Sheet Date there has not been with
respect to the Company any:

                (a) material adverse change in the financial condition,
properties, assets, liabilities, customer contracts or other customer
arrangements, business, financial performance, results of operations or
prospects;

                (b) debt, obligation, liability or indebtedness for borrowed
money (whether absolute, accrued, contingent or otherwise, and whether due or to
become due), including without limitation customer contracts and current
obligations, incurred other than in



                                       14
<PAGE>   23


the ordinary course of business that exceeds $50,000 in any one case or $250,000
in the aggregate;

                (c) debt, obligation or liability incurred by the Company to any
of its officers, directors, stockholders or affiliates, or any loans or advances
made to any of its officers, directors, stockholders or affiliates, except
normal compensation and expense allowances payable to officers;

                (d) payment, discharge or satisfaction of a lien or liability,
which lien or liability was not either (i) shown on the balance sheet as of the
Balance Sheet Date or (ii) incurred in the ordinary course of business after the
Balance Sheet Date;

                (e) contingent liability incurred as guarantor or surety with
respect to the debts, liabilities or obligations of others;

                (f) mortgage, deed of trust, security interest, pledge, lien,
title retention device, collateral assignment, claim, interest, charge,
restriction or other encumbrance of any kind on any of the assets or properties
of the Company;

                (g) issuance or sale of any debt or equity securities of the
Company, or any options, warrants or other rights to acquire from the Company,
directly or indirectly, any debt or equity securities of the Company;

                (h) purchase, lease, license, assignment, sale or other
disposition or transfer, or any agreement or other arrangement for the purchase,
lease, license, assignment, sale or other disposition or transfer, of any of its
properties or assets other than in the ordinary course of business ;

                (i) damage, destruction or loss, whether or not covered by
insurance, materially and adversely affecting its properties, assets or
business;

                (j) cancellation of any debts to or claims of the Company, or
any amendment, modification, termination or waiver of any rights of value to the
Company in excess of $50,000 in any one case or $250,000 in the aggregate;

                (k) declaration, setting aside or payment of any dividend on, or
the making of any other distribution in respect of, the capital stock of the
Company, any split, subdivision, stock dividend, combination or recapitalization
of the capital stock of the Company or any direct or indirect redemption,
purchase or other acquisition by the Company of the capital stock of the
Company;

                (l) labor dispute or claim of unfair labor practices, any change
in the compensation payable or to become payable to any of the Company's
officers, employees or agents, or any bonus payment or compensation arrangement
made to or with any of such officers, employees or agents (except as previously
disclosed in writing to and approved in writing by Parent) other than normal
bonuses or compensation increases noted on Item 2.10(l);

                (m) termination of employment with respect to its management,
supervisory, development or other key personnel (a true and complete list of all
management,



                                       15
<PAGE>   24

supervisory, development and other key personnel of the Company as of the
Agreement Date has been provided to Parent);

                (n) amendment or change in the Articles of Incorporation or
Bylaws or equivalent charter documents of the Company;

                (o) entering into, amendment, modification, waiver,
relinquishment, termination or non-renewal by the Company of any Contract (as
defined in Section 2.11) other than in the ordinary course of its business or
any written or oral indication or assertion by the other party thereto of any
material problems with the Company's services or performance under such Contract
or of such other party's demand to amend, modify, terminate or not renew any
such Contract;

                (p) material change in the manner in which the Company extends
discounts, credits or warranties to customers or otherwise deals with its
customers;

                (q) entering into by the Company of any Contract (i) that
requires or contemplates a current and/or future financial commitment, expense
or obligation on the part of the Company involving in excess of $100,000, or
(ii) that is not entered into in the ordinary course of the Company's business
and is in an amount involving in excess of $10,000 individually or $100,000 in
the aggregate;

                (r) license, transfer or grant of a right with respect to
Company Intellectual Property (as defined in Section 2.13), other than those
licensed, transferred or granted in the ordinary course of the Company's
business consistent with its past practices;

                (s) the Company has not (i) received any Acquisition Proposal
(as defined in Section 4.9), or (ii) solicited, initiated, encouraged or
induced, or provided any nonpublic information to or entered into any
discussions with any person or entity for the purpose of soliciting, initiating,
encouraging or inducing, the making or submission of any Acquisition Proposal;

                (t) the Company has not formed any subsidiary or acquired any
equity interest or other interest in any other entity;

                (u) the Company has not made any capital expenditures outside
the ordinary course of business, except for such capital expenditures as in the
aggregate, measured by invoice amount, do not exceed $100,000 or were consented
to by Parent in writing; or

                (v) agreement, whether in writing or otherwise, to take any of
the actions specified in the foregoing items (a) through (u).

            2.11 Agreements and Commitments. Except as set forth in Item 2.11,
or otherwise provided to Parent in its due diligence review of the Company, the
Company is not a party or subject to any oral or written agreement, contract,
lease, license, assignment, mortgage, instrument, transaction, quotation,
obligation or commitment ("Contract"), including but not limited to the
following:




                                       16
<PAGE>   25

                (a) any Contract entered into after January 1, 1997 providing
for payments (whether fixed, contingent or otherwise) by or to the Company in an
aggregate amount of $250,000 or more under which the Company currently has any
executory obligations (other than the Company's standard form indemnity or
warranty obligations);

                (b) any material Contract entered into by the Company with
respect to the grant, purchase, sale, license, transfer or encumbrance of
Intellectual Property Rights (as defined in Section 2.13) of any kind, including
but not limited to the Company Intellectual Property, except for "shrink wrap"
licenses (all forms of which have been provided to Parent);

                (c) any Contract for the purchase, sale, lease, license or
transfer of real or personal property providing for payments (whether fixed,
contingent or otherwise) in excess of $50,000 per year other than purchase
orders entered into in the ordinary course of business;

                (d) any dealer, distributor, sales representative, original
equipment manufacturer (OEM), value added remarketer or other Contract for the
production, distribution or marketing of the Company's products or services;

                (e) any franchise agreement, financing statement, mortgage or
security agreement;

                (f) any Contract with respect to the redemption or purchase of
the Company's capital stock other than purchase agreements relating to Company
Options or Company Common Stock issued under stock plans;

                (g) any joint venture agreement or arrangement or any other
Contract that involves a sharing of profits with, or the payment of royalties
to, any other person or entity in an aggregate amount of $75,000 or more;

                (h) any instrument evidencing indebtedness for borrowed money by
way of direct loan, sale of debt securities, purchase money obligation,
conditional sale, guarantee or otherwise, except for trade indebtedness of the
Company incurred or made in the ordinary course of business, and except as
disclosed in the Company Financial Statements;

                (i) any Contract containing covenants limiting or purporting to
limit the Company's freedom to compete at any time in any line of business in
any geographic area;

                (j) any Contract relating to the employment or compensation of
any director, officer, employee, consultant or other agent of the Company;

                (k) any Contract between the Company and any Stockholder or
affiliate; or

                (l) any Contract that is otherwise material to the Company, or
entered into other than in the ordinary course of business and involving a
payment of more than $50,000.

         The Company has provided Parent with true and complete copies of each
of the Contracts set forth in Item 2.11 (collectively, the "Company
Agreements"), which Item 2.11 is




                                       17
<PAGE>   26

true and complete. All Company Agreements are valid, binding and enforceable 
against the parties thereto and in full force and effect.

            2.12 No Default; No Consent Required; No Restrictions. The Company
is not in any respect in breach of or default under any Company Agreement which
breach or default would have a Material Adverse Effect on the Company. Except as
set forth in Item 2.12, the Company has not received any notice or other
communication regarding any such actual or possible breach of, or default under,
any Company Agreement. The Company does not have any liability for
renegotiations of government Contracts or subcontracts. Except as set forth in
Item 2.12, no consent, waiver, or approval of any third party is required to
ensure that, following the Effective Time, any Company Agreement will continue
to be in full force and effect without any breach, default or violation thereof
caused by virtue of the Merger or by any of the Transactions or Transactional
Agreements. Except as set forth in Item 2.12, the Company is not a party to, and
no asset or property of the Company is bound or affected by, any Order,
Contract, covenant or agreement (noncompete or otherwise) that restricts or
prohibits (or purports to restrict or prohibit) the Company from making material
acquisitions of property or freely engaging at any time in any business now
conducted by any of them or from competing anywhere in the world (including
without limitation any Orders, Contracts, covenants or agreements restricting
the geographic area in which the Company may sell, license, market, distribute
or support any products or technology or provide services, or restricting the
markets, customers or industries that the Company may address in operating their
respective businesses), or includes any grants by the Company of exclusive
licenses.

            2.13 Intellectual Property.

                 2.13.1 The Company owns, or has the valid right or license to
use, possess, sell or license, all Intellectual Property Rights necessary or
required for the conduct of the business of the Company as presently conducted
and as presently proposed to be conducted (such Intellectual Property Rights
being hereinafter collectively referred to as the "Company Intellectual
Property"), and such Intellectual Property Rights to use, possess, sell or
license are sufficient for such conduct of such business as presently conducted.
As used herein, the term "Intellectual Property Rights" means, collectively, all
worldwide industrial and intellectual property rights, including, without
limitation, patents, patent applications, patent rights, trademarks, trademark
registrations and applications therefor, trade dress rights, trade names,
service marks, service mark registrations and applications therefor, copyrights,
copyright registrations and applications therefor, mask work rights, mask work
registrations and applications therefor, inventions, trade secrets, know-how,
customer lists, supplier lists, proprietary processes and formulae, software
source and object code, algorithms, architectures, structures, screen displays,
layouts, inventions, development tools, designs, blueprints, specifications,
technical drawings (or similar information in electronic format) and all
documentation and media constituting, describing or relating to the above,
including, without limitation, manuals, programmers' notes, memoranda and
records.

                 2.13.2 Except for required consents disclosed in Item 2.13.2,
the execution, delivery and performance of this Agreement, the Articles of
Merger and the consummation of the Merger and the other Transactions
contemplated hereby and/or by the Company Ancillary Agreements will not
constitute a material breach of or default under any Contract, license or other
agreement governing any Company Intellectual Property to which the



                                       18
<PAGE>   27


Company is a party (collectively, the "Company Intellectual Property
Agreements"), will not cause the forfeiture or termination of, or give rise to a
right of forfeiture or termination of, any Company Intellectual Property or
materially impair the right of the Company, Parent or the Surviving Corporation
to use, possess, sell or license any Company Intellectual Property or portion
thereof. There are no royalties, honoraria, fees or other payments payable by
the Company to any third person by reason of the ownership, use, possession,
license, sale or disposition of any Company Intellectual Property by the Company
and none will become payable as a result of the consummation of the transactions
contemplated by this Agreement.

                 2.13.3 Neither the manufacture, marketing, license, sale,
furnishing or intended use of any product or service currently licensed,
utilized, sold, provided or furnished by the Company or currently under
development by the Company violates any license or Contract between the Company
and any third party or infringes or misappropriates any Intellectual Property
Right of any other party; and there is no pending or, to the knowledge of the
Company, threatened claim or litigation contesting the validity, ownership or
right of the Company to use, possess, sell, license or dispose of any Company
Intellectual Property nor, to the knowledge of the Company, is there any basis
for any such claim, nor has the Company received any notice asserting that any
Company Intellectual Property or the proposed use, sale, license or disposition
thereof conflicts or will conflict with the rights of any other party, nor, to
the knowledge of the Company, is there any basis for any such assertion. To the
best knowledge of the Company, no third party has infringed or misappropriated
any Company Intellectual Property, except as disclosed to Parent in writing.

                 2.13.4 To the best knowledge of the Company, no current or
former employee of or consultant to the Company is in violation of any material
provision of any employment contract, patent disclosure agreement,
non-competition agreement, non-solicitation agreement or any other Contract, or
any restrictive covenant relating to the right of any such employee to be
employed by the Company, or to use trade secrets or proprietary information of
others, and the employment of such employees or consultants by the Company does
not subject the Company to any liability.

                 2.13.5 The Company has taken all reasonable and practicable
steps, consistent with industry standards, to protect, preserve and maintain the
secrecy and confidentiality of the Company Intellectual Property and all the
Company's proprietary rights therein. Except as disclosed in Item 2.13.5, all
current and former officers, employees and consultants of the Company having
access to proprietary information have executed and delivered to the Company an
agreement regarding the protection of such proprietary information and the
assignment of inventions to the Company and to the best knowledge of the
Company, no current or former officer, employee or consultant is in violation of
any provision thereof; and copies of the form of all such agreements have been
delivered to Parent's counsel. The Company has secured valid written assignments
from all consultants, contractors and employees who were involved in, or who
contributed to, the creation or development of any Company Intellectual Property
of the rights to such contributions that the Company does not already own by
operation of law. No current or former employee, officer, director, consultant
or independent contractor of the Company has any right, license, claim or
interest whatsoever in or with respect to any Company Intellectual Property.




                                       19
<PAGE>   28

                 2.13.6 Item 2.13.6 contains a complete list of (i) all
worldwide registrations of any patents, copyrights, mask works, trademarks and
services marks with any Governmental Body; (ii) all applications, registrations,
filings and other formal actions made or taken pursuant to federal, state and
foreign laws by the Company to secure, perfect or protect its interest in the
Company Intellectual Property, including, without limitation, all patent
applications, copyright applications, and applications for registration of
trademarks and service marks; and (iii) all unregistered copyrights, trademarks
and service marks. All patents, and all registered trademarks, service marks and
copyrights held by the Company are valid, enforceable and subsisting. The
Company owns all right, title and interest in and to all such Company
Intellectual Property free and clear of all security interests, liens, pledges,
mortgages, assignments, claims, licenses, restrictions and encumbrances.

                 2.13.7 Item 2.13.7 contains a complete list of (i) all
licenses, sublicenses and other Contracts as to which the Company is a party and
pursuant to which any person is authorized to use any Company Intellectual
Property, and (ii) all licenses, sublicenses and other Contracts as to which the
Company is a party and pursuant to which the Company is authorized to use any
third party patents, trademarks or copyrights, including but not limited to
software ("Third Party Intellectual Property") which (x) but for such Contracts
would be infringed by, or (y) are incorporated in, or form a part of, any
product or service sold, licensed, distributed, provided or marketed by the
Company.

                 2.13.8 Neither the Company, nor any other party acting on its
behalf, has disclosed or delivered to any party, or permitted the disclosure or
delivery to any escrow agent or other party of any Company Source Code. No event
has occurred, and no circumstance or condition exists, that (with or without
notice or lapse of time) will, or would reasonably be expected to, result in the
disclosure or delivery to any party of any the Company Source Code. Item 2.13.8
identifies each Contract (whether written or oral) pursuant to which the Company
has deposited, or is or may be required to deposit, with an escrowholder or any
other party, any the Company Source Code and further describes whether the
execution of this Agreement or the consummation of the Merger or any of the
other transactions contemplated hereby, in and of itself, would reasonably be
expected to result in the release from escrow of any the Company Source Code. As
used in this Section 2.13.8, "the Company Source Code" means, collectively, any
source code, or any material portion or aspect of the source code, or any
material proprietary information or algorithm contained in or relating to any
source code, of any Company Intellectual Property or any other product marketed
by the Company.

                 2.13.9 Except as set forth in Item 2.13.9, to the Company's
knowledge, all software developed by the Company and licensed by the Company to
customers and all other products manufactured, sold, licensed, leased or
delivered by the Company to customers and all services provided by the Company
to customers on or prior to the Closing Date conform in all material respects to
applicable contractual commitments, express and implied warranties, product
specifications and product documentation and to any representations provided to
customers and the Company has no material liability (and, to the best of
Company's knowledge, there is no basis for any present or future action, suit,
Proceeding, charge, complaint, claim or demand against the Company giving rise
to any liability that could have a Material Adverse Effect on the Company) for
replacement or repair thereof or other damages in connection therewith in excess
of any reserves therefor reflected on the Company Financial Statements. During
the six (6) month period ended on March 31, 1999, the Company has not
experienced any product or



                                       20
<PAGE>   29


service warranty claims that were materially greater than the amount of the same
type of claims experienced for the six (6) month period ended September 30,
1998. Since January 1, 1996, the Company has not had any of its products
returned by a purchaser thereof except for normal warranty returns consistent
with past history and those returns that would not result in a reversal of any
material amount of revenue recognized by the Company on any of its financial
statements from such purchases. The Company is not under any liability or
obligation, and no such outstanding claim has been made, with respect to the
return of inventory or products in the possession of customers, licensees,
distributors, retailers, or end-users, except such liabilities, obligations and
claims as, in the aggregate, do not exceed $100,000.

                 2.13.10 No government funding or university or college
facilities were used in the development of the computer software programs or
applications owned by the Company.

                 2.13.11 All versions of the software products currently being
developed, licensed, marketed or distributed by the Company are (and, to the
Company's knowledge, any third party software included in any such products is)
Year 2000 Ready. To the extent that older versions of the Company's products are
not Year 2000 Ready: the Company has no contractual obligations to make such
older versions Year 2000 Ready; customers using any of such older versions have
been informed of upgrade paths to products that are Year 2000 Ready, and such
upgrades are available; and the failure of such customers to upgrade to Year
2000 Ready versions of such software products will not directly or indirectly
have a Material Adverse Effect on the Company. "Year 2000 Ready" means, as
applied to a software product, that: (i) such software product has been tested
by the Company and found to be Y-2000 Compliant (as defined in Section 2.28) or,
only as to software products which Company only markets or distributes, has been
represented and warranted to the Company, in writing, by the developer or owner
thereof as being Y-2000 Compliant, which written representations and warranties
have been provided to Parent; and (ii) accurately processes date and/or
time-dependent data (including, but not limited to, calculating, comparing and
sequencing) from, into, throughout and between the 20th and 21st centuries
(through 2035), the years 1999 and 2000, and leap year calculations (year 2000
is a leap year); and (iii) when used in combination with other information
technology, such software product will accurately process date and/or
time-dependent data if the other information technology generates accurate date
and/or time output.

            2.14 Compliance with Laws. The Company has complied and is in
compliance with all applicable laws, statutes, ordinances, regulations and
rules, and all Orders applicable to the Company or to its assets, properties and
business, including, without limitation: (a) all applicable federal and state
securities laws and regulations; (b) all applicable federal, state and local
laws, statutes, ordinances, rules and regulations, and all Orders pertaining to
(i) the sale, licensing, leasing, ownership or management of the Company's
owned, leased or licensed real or personal property, Company Intellectual
Property, products or technical data, (ii) employment or employment practices,
terms and conditions of employment, or wages and hours or (iii) safety, health,
fire prevention, environmental protection (including toxic waste disposal and
related matters described in Section 2.21), building standards, zoning or other
similar matters; (c) the Export Administration Act and regulations promulgated
thereunder or other laws, regulations, rules or Orders applicable to the export
or re-export of controlled commodities or technical data; or (d) the Immigration
Reform and Control Act, except in each case where the failure to so comply would
not have a Material Adverse Effect on the Company. The Company has received



                                       21
<PAGE>   30


all licenses, permits and approvals from, and has made all filings with, third
parties, including Governmental Bodies and authorities, necessary to conduct its
business as presently conducted, all of which licenses, permits and approvals
are set forth in Item 2.14, except licenses, permits, approvals and filings, the
absence of which, individually or in the aggregate, would not have a Material
Adverse Effect on the Company.

            2.15 Certain Transactions and Agreements. Except as set forth in
Item 2.15, no person who is an officer, director, employee or stockholder of the
Company, or a member of any such person's immediate family, has any direct or
indirect ownership interest in, or any employment or consulting agreement with,
any entity that competes with the Company or Parent (except with respect to any
interest in less than 1% of the outstanding voting shares of any corporation
whose stock is publicly traded). Except as set forth in Item 2.15, no person who
is an officer, director, employee or stockholder of the Company, or any member
of any such person's immediate family, is directly or indirectly interested in
any Contract or informal arrangement with the Company, including, without
limitation, any loan arrangements, except for compensation for services as an
officer, director or employee of the Company and except for the normal rights of
a stockholder or optionholder. Except as set forth in Item 2.15, none of such
officers, directors, employees or stockholders or family members has any
interest in any property, real or personal, tangible or intangible, including,
without limitation, inventions, patents, copyrights, trademarks, trade names or
trade secrets, used in the business of the Company. With regard to stockholders
of the Company that are not Significant Stockholders, the Company makes the
representations and warranties set forth in this Section 2.15 to the best of its
knowledge.

            2.16 Employees.

                 2.16.1 To the best knowledge of the Company, the Company is in
compliance in all material respects with all applicable laws, agreements and
Contracts relating to employment, employment practices, wages, hours, and terms
and conditions of employment, including, but not limited to, employee
compensation matters. Except as set forth in Items 2.16.1 and 2.16.4 or as
previously provided to Parent, the Company does not have any employment
contracts or consulting agreements currently in effect that are not terminable
at will (other than agreements with the sole purpose of providing for the
confidentiality of proprietary information or assignment of inventions). All
independent contractors have been properly classified as independent contractors
for the purposes of federal and applicable state tax laws, laws applicable to
employee benefits and other applicable law, except where the failure to be so
classified, in the aggregate, results in actual or potential liability to the
Company of no more than $100,000.

                 2.16.2 The Company is not: (i) nor has ever been, subject to a
union organizing effort; (ii) subject to any collective bargaining agreement
with respect to any of its employees; (iii) subject to any other Contract,
written or oral, with any trade or labor union, employees' association or
similar organization; or (iv) the subject of any current labor disputes that
would materially impair the operations of the Company's business. The Company
has good labor relations, and the Company has no knowledge of any facts
indicating that the consummation of the Merger or any of the other transactions
contemplated hereby will adversely impact such labor relations in a material
manner. As of the Agreement Date, the Company has no knowledge that any of its
employees having an annual salary in excess of $50,000 intends to leave his or
her employ. There are no controversies pending or, to the best knowledge of the



                                       22
<PAGE>   31


Company, threatened, between the Company (on the one hand) and any of its
employees (on the other hand) that would be reasonably likely to result in the
Company incurring any material liability. All of the employees of the Company
employed in the United States of America are legally permitted to be employed by
the Company in the United States of America.

                 2.16.3 The Company has no pension plan which constitutes, or
has since the enactment of the Employee Retirement Income Security Act of 1974,
as amended ("ERISA"), constituted, a "multiemployer plan" as defined in Section
3(37) of ERISA. No pension plan of the Company is subject to Title IV of ERISA.

                 2.16.4 Except as set forth in Item 2.16.4, the Company has
previously delivered to Parent each employment, severance or other similar
Contract, arrangement or policy, each "employee benefit plan" as defined in
Section 3(3) of ERISA and each plan or arrangement (written or oral) providing
for insurance coverage (including any self-insured arrangements), workers'
benefits, vacation benefits, severance benefits, disability benefits, death
benefits, hospitalization benefits, retirement benefits, deferred compensation,
profit-sharing, bonuses, stock options, stock purchase, phantom stock, stock
appreciation or other forms of incentive compensation or post-retirement
insurance, compensation or benefits for employees, consultants or directors
which has been entered into, maintained or contributed to by the Company since
January 1, 1994. Such Contracts, plans and arrangements as are described in Item
2.16.4 are hereinafter collectively referred to as "Company Benefit
Arrangements." To the best knowledge of the Company, except as otherwise
described in Item 2.16.4, each Company Benefit Arrangement has been maintained
in compliance in all material respects with its terms and with the requirements
prescribed by any and all laws, statutes, Orders, rules and regulations that are
applicable to such Company Benefit Arrangement, and each such Company Benefit
Arrangement that is an "employee pension benefit plan" as defined in Section
3(2) of ERISA that is intended to qualify under Section 401(a) of the Code has
received a favorable determination letter that such plan satisfied the
requirements of the Tax Reform Act of 1986 (a copy of which letter(s), if any,
have been delivered to Parent and its counsel) or has been applied for and is
currently pending a favorable determination letter that such plan satisfies the
Tax Reform Act of 1986. The Company has delivered to Parent and its counsel a
true and complete copy and description of each Company Benefit Arrangement. The
Company has timely filed and delivered to Parent and its counsel the most recent
annual report (Form 5500) for each Company Benefit Arrangement that is an
"employee benefit plan" as defined under ERISA that is subject to such
requirements. To the best knowledge of the Company, the Company has never been a
participant in any "prohibited transaction," within the meaning of Section 406
of ERISA with respect to any employee pension benefit plan (as defined in
Section 3(2) of ERISA) which the Company sponsors as employer or in which
Company participates as an employer, which was not otherwise exempt pursuant to
Section 408 of ERISA (including any individual exemption granted under Section
408(a) of ERISA), or which could result in an excise tax under the Code. All
contributions due from the Company as of the date of the most recent balance
sheet provided by the Company to Parent with respect to any of the Company
Benefit Arrangements have been made or have been accrued on such balance sheet
and no further contributions will be due or will have accrued thereunder as of
the Closing Date other than amounts consistent with the amounts paid or accrued
in the periods reflected on such balance sheet. All individuals who, pursuant to
the terms of any Company Benefit Arrangement, are entitled to participate in any
such Company



                                       23
<PAGE>   32


Benefit Arrangement, are currently participating in such Company Benefit
Arrangement or have been offered an opportunity to do so and have declined.

                 2.16.5 There has been no amendment to, written interpretation
or announcement (whether or not written) by the Company relating to, or change
in employee participation or coverage under, any Company Benefit Arrangement
that would increase materially the expense of maintaining such Company Benefit
Arrangement above the level of the expense incurred in respect thereof for the
Company's fiscal year ended December 31, 1998.

                 2.16.6 To the best knowledge of the Company, the group health
plans (as defined in Section 4980B(g) of the Code) that benefit employees of the
Company are in compliance, in all material respects, with the continuation
coverage requirements of Section 4980B of the Code as such requirements affect
the Company and its employees. As of the Closing Date, there will be no material
outstanding, uncorrected violations under the Consolidation Omnibus Budget
Reconciliation Act of 1985, as amended ("COBRA"), with respect to any of the
Company Benefit Arrangements, covered employees, or qualified beneficiaries.

                 2.16.7 Except as otherwise described in Item 2.16.7 or as set
forth in Item 2.8, no benefit payable or which may become payable by the Company
pursuant to any Company Benefit Arrangement or as a result of or arising under
this Agreement or the other Transactional Agreements will constitute an "excess
parachute payment" (as defined in Section 280G(b)(1) of the Code) which is
subject to the imposition of an excise tax under Section 4999 of the Code or
which would not be deductible by reason of Section 280G of the Code. Except as
set forth on Item 2.16.7, the Company is not a party to any: (i) Contract with
any executive officer or other key employee thereof (A) the benefits of which
are contingent, or the terms of which are materially altered, upon the
occurrence of a transaction involving the Company in the nature of the Merger or
any of the other Transactions or any Transactional Agreements, (B) providing any
term of employment or compensation guarantee, or (C) providing severance
benefits or other benefits after the termination of employment of such employee
regardless of the reason for such termination of employment; or (ii) Contract or
plan, including, without limitation, any stock option plan, stock appreciation
rights plan or stock purchase plan, any of the benefits of which will be
increased, or the vesting of benefits of which will be accelerated, by the
occurrence of the Merger or any of the other Transactions or any Transactional
Agreements, or the value of any of the benefits of which will be calculated on
the basis of any of the Transactions or any Transactional Agreements.

                 2.16.8 To the Company's knowledge, no current or former
employee, consultant or independent contractor of the Company: (i) is in
violation of any term or covenant of any employment contract, patent disclosure
agreement, noncompetition or nondisclosure agreement or any other Contract or
agreement with, or obligation to, any other party by virtue of such employee's,
consultant's, or independent contractor's being employed by, or performing
services for, the Company or using trade secrets or proprietary information of
others; or (ii) has developed any technology, software or other copyrightable,
patentable, or otherwise proprietary work for the Company that is subject to any
Contract under which such employee, consultant or independent contractor has
assigned or otherwise granted to any third party any rights or interest
(including without limitation Company Intellectual Property) in such technology,
software or other copyrightable, patentable or otherwise proprietary work,
except for technology developed



                                       24
<PAGE>   33


by the Company specifically for its customers pursuant to development contracts
entered into by the Company in the ordinary course of its business, which
provide for retention of such technology and the related intellectual property
rights by such customers. To the Company's knowledge, the employment of any
employee of the Company does not subject the Company or to any liability to any
third party.

                 2.16.9 There are no material pending claims against the Company
under any workers' compensation plan or policy or for long-term disability
benefits.

            2.17 Corporate Documents. The books of account, stock records,
minute books and other records of the Company are accurate, up to date and
complete in all material respects, have been maintained in accordance with sound
and prudent business practices and accurately and fairly reflect in all material
respects the basis for the Company Financial Statements. All of the records of
the Company are in the actual possession and direct control of the Company. The
Company has made available to Parent for examination all documents and
information listed in Items 2.1 through 2.23 and 2.30 or other exhibits called
for by this Agreement that have been requested by Parent or its legal counsel,
including, without limitation, the following: (a) copies of the Company's
Articles of Incorporation or Bylaws as currently in effect; (b) the Company's
minute book containing all records of all proceedings, consents, actions and
meetings of its directors and stockholders; (c) the Company's stock ledger,
journal and other records reflecting all stock issuances and transfers; and (d)
all permits, Orders and consents issued by any regulatory agency or other
Governmental Body with respect to the Company, or any securities of the Company,
and all applications for such permits, Orders and consents.

            2.18 No Brokers. Neither the Company nor any affiliate of the
Company is obligated for the payment of any fees or expenses of any investment
banker, broker, finder or similar party in connection with the origin,
negotiation or execution of this Agreement or the Articles of Merger or in
connection with the Merger or any other transaction contemplated by this
Agreement, and Parent will not incur any liability to any such investment
banker, broker, finder or similar party as a result of, this Agreement, the
Merger or any act or omission of the Company or any of its employees, officers,
directors, stockholders, agents or affiliates.

            2.19 Bank Accounts. Item 2.19 sets forth a true and complete list of
(i) all bank accounts and safe deposit boxes of the Company and all persons who
are signatories thereunder or who have access thereto and (ii) the names of all
persons holding general or special powers-of-attorney from the Company and a
summary of the terms thereof.

            2.20 Insurance. During the prior two years, the Company has
maintained, and now maintains, policies of insurance and bonds of the type and
in amounts customarily carried by persons or entities conducting businesses or
owning assets similar in type and size to those of the Company. There is no
claim pending under any of such policies or bonds as to which coverage has been
questioned, denied or disputed by the underwriters of such policies or bonds.
All premiums due and payable under all such policies and bonds have been timely
paid and the Company is otherwise in compliance with the terms of such policies
and bonds. The Company has no knowledge of any threatened termination of any of
such policies or bonds. All policies of insurance and bonds now held by the
Company are set forth in Item 2.20 or have been delivered to Parent together
with the name of the insurer under each policy, the policy coverage amount and
any pending claims under the policy.




                                       25
<PAGE>   34

            2.21 Environmental Matters.

                 2.21.1 To the best knowledge of the Company, during the period
that the Company has owned or leased the premises occupied by it since the date
of its organization, including the premises currently occupied by it, there have
been no disposals, releases or threatened releases of Hazardous Materials on any
such premises that might have a Material Adverse Effect on the Company. Neither
the Company nor any Stockholder has any knowledge of any presence, disposals,
releases or threatened releases of Hazardous Materials on or from any of such
premises, which may have occurred prior to the Company having taken possession
of any of such premises that would have a Material Adverse Effect on the
Company. For purposes of this Agreement, the terms "disposal," "release," and
"threatened release" have the definitions assigned thereto by the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, 42 U.S.C.
Section 9601 et seq., as amended ("CERCLA"). For the purposes of this Section
2.21, "Hazardous Materials" mean any hazardous or toxic substance, material or
waste that is or becomes prior to the Closing Date regulated under, or defined
as a "hazardous substance," "pollutant," "contaminant," "toxic chemical,"
"hazardous material," "toxic substance" or "hazardous chemical" under (i)
CERCLA; (ii) the Emergency Planning and Community Right-to-Know Act, 42 U.S.C.
Section 11001 et seq.; (iii) the Hazardous Materials Transportation Act, 49
U.S.C. Section 1801, et seq.; (iv) the Toxic Substances Control Act, 15 U.S.C.
Section 2601 et seq.; (v) the Occupational Safety and Health Act of 1970, 29
U.S.C. Section 651 et seq.; (vi) regulations promulgated under any of the above
statutes; or (vii) any applicable state or local law, statute, ordinance, rule
or regulation that has a scope or purpose similar to those identified above.

                 2.21.2 To the best knowledge of the Company, during the time
that the Company has owned or leased such premises, none of the premises
currently owned or leased by the Company or any premises previously occupied by
the Company has been or is in material violation of any federal, state or local
law, statute, ordinance, rule, regulation or Order relating to industrial
hygiene or to the environmental conditions in such premises.

                 2.21.3 To the best knowledge of the Company, during the time
that the Company has owned or leased the premises currently occupied by it or
any premises previously occupied by the Company, neither the Company, nor, to
the Company's knowledge, any third party, has used, generated, manufactured or
stored in such premises or transported to or from such premises any Hazardous
Materials that would have a Material Adverse Effect on the Company.

                 2.21.4 To the best knowledge of the Company, during the time
that the Company has owned or leased the premises currently occupied by it or
any premises previously occupied by the Company, there has been no Proceeding
brought or threatened in writing against the Company, or any settlement reached
by the Company with any party or parties alleging the presence, disposal,
release or threatened release of any Hazardous Materials on, from or under any
of such premises.

                 2.21.5 To the best knowledge of the Company, during the time
that the Company has owned or leased the premises currently occupied by it or
any premises previously occupied by the Company, no Hazardous Materials have
been transported from such premises to



                                       26
<PAGE>   35


any site or facility now listed or proposed for listing on the National
Priorities List, at 40 C.F.R. Part 300, or any list with a similar scope or
purpose published by any state authority.

            2.22 Customers. The Company has made available to Parent a true and
complete list of the names with the dollar value of sales to each of the
customers of the Company having aggregate annual sales of $50,000 or more in any
calendar year since January 1, 1996. Except as set forth in Item 2.22, the
Company has no outstanding disputes with any such customer, except where the
failure to resolve such dispute would not have a Material Adverse Effect on the
Company.

            2.23 Accounts Receivable; Accounts Payable.

                 2.23.1 Item 2.23.1 sets forth a true and complete aged list of
unpaid accounts and notes receivable owing to the Company, all of which are, and
all receivables generated from the Agreement Date through the Closing Date will
be, collectible in full in the ordinary course of business except to the extent
that reserves have been established in the Company Financial Statements or are
set forth in Item 2.23.1, which reserves, to the best knowledge of the Company,
are sufficient. No such account has been assigned or pledged to any other person
or entity and no defense or setoff to any such account has been asserted by the
account obligor.

                 2.23.2 Item 2.23.2 sets forth a true and complete list of all
accounts payable of the Company in an amount in excess of $10,000 as of March
31, 1999.

            2.24 Voting Agreement; Proxies. The Significant Stockholders (other
than Teknekron Corporation) have executed Voting Agreements, and the Irrevocable
Proxies attached thereto as Exhibit A ("Proxies"). If Teknekron Corporation
exercises the Teknekron Option in whole or in part, then upon the request of
Parent, Teknekron Corporation will execute and deliver to Parent a Voting
Agreement and Irrevocable Proxy within three (3) days of such request.

            2.25 Vote Required. The affirmative vote of the holders of a
majority of the shares of Company Common Stock that are issued and outstanding
on the Record Date voting together as a single class is the only vote of the
holders of any of the shares of the Company's capital stock necessary to approve
this Agreement, the Merger, the Articles of Merger and the other Transactions.
As used in this Section 2.25, the term "Record Date" means the record date for
determining those stockholders of the Company who are entitled to vote at the
Company Stockholders' Meeting (as defined in Section 4.4) or at any action taken
by written consent of the Company's stockholders without a meeting under
applicable law.

            2.26 Board Approval. The Board of Directors of the Company has
unanimously (i) duly approved this Agreement, the Articles of Merger and the
Merger, and (ii) determined that the Merger is in the best interests of the
stockholders of the Company and is on terms that are fair to such stockholders.

            2.27 No Existing Discussions. Neither the Company nor any director,
officer, stockholder, employee or agent of the Company is engaged in any way,
directly or indirectly, in



                                       27
<PAGE>   36

any discussions, communications or negotiations with any third party relating to
any Acquisition Proposal (as defined in Section 4.10).

            2.28 Year 2000 Compliance. The Company is conducting a comprehensive
review of all operating codes, programs, utilities and other software, as well
as all hardware and systems, utilized by the Company (collectively, "Systems")
to determine whether such Systems are designed or have been remediated to
record, store, process and present dates on or after January 1, 2000
("Millennial Dates") in the same manner, and with the same functionality, as
provided on or before December 31, 1999, and are designed to not lose
functionality or degrade in performance as a consequence of such software
operating at a Millennial Date (such design and performance being referred to as
"Y-2000 Compliant"). The Systems that have been tested by the Company as of the
Agreement Date are identified in Item 2.28 and were either Y-2000 Compliant, or
made to be Y-2000 Compliant, and the Company warrants the Y-2000 Compliant
status thereof. If any Systems tested to date are or were not fully Y-2000
Compliant, such non-compliant Systems, or subparts thereof, are: (a) currently
being modified, remediated, repaired, replaced, or otherwise made fully Y-2000
Compliant by the Company, and the scope and projected expense of said
remediation is set forth in Item 2.28; or (b) such non-compliant Systems, or
subparts thereof, are being superseded or phased out according to a written plan
and schedule for system reorganization that is set forth in Item 2.28. To the
best knowledge of the Company, all material vendors and suppliers to the Company
are Y-2000 Compliant.

            2.29 Disclosure.

                 2.29.1 No statement made by the Company or the Stockholders in
either this Agreement, its exhibits and the Company Disclosure Letter, nor any
of the certificates to be delivered by the Company or the Stockholders to Parent
under this Agreement, taken together, contains any untrue statement of a
material fact or omits to state any material fact necessary in order to make the
statements contained herein and therein, in light of the circumstances under
which such statements were made, not misleading.

                 2.29.2 None of the information supplied or to be supplied by or
on behalf of the Company or the Stockholders for inclusion or incorporation by
reference in any statement, recommendation, proposal or document provided to the
stockholders of the Company, at the time of the Company Stockholders' Meeting
(as defined in Section 4.4) or as of the Effective Time, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in the
light of the circumstances under which they are made, not misleading.

            2.30 Knowledge. As used in this Agreement, the term "knowledge" or
"best knowledge" of the Company and/or the Stockholders shall mean the actual
knowledge, after reasonable investigation, of any of the persons listed in
Schedule 2.30.

            2.31 Material Adverse Effect. As used with respect to the Company,
Material Adverse Effect shall mean any event, change or effect that is (or will
with the passage of time be) materially adverse to the financial condition,
properties, assets, liabilities, employee base, business, prospects, operations
or results of operations of the Company.




                                       28
<PAGE>   37

         3. REPRESENTATIONS AND WARRANTIES OF PARENT AND NEWCO.

            Parent and Newco hereby represent and warrant to the Company that
except as may be set forth in a Parent disclosure letter delivered by Parent to
the Company prior to the execution of this Agreement (the "Parent Disclosure
Letter"; for all purposes of this Agreement, the statements contained in the
Parent Disclosure Letter shall also be deemed to be representations and
warranties made and given by the Parent under Article 3 of this Agreement),
including items in the Parent Disclosure Letter referred to as "Items" below,
each of the following representations, warranties and statements in this Article
3 are true and accurate as of the Agreement Date and will be true and accurate
as of the Closing Date:

            3.1 Organization and Good Standing. Parent is a corporation duly
organized, validly existing and in good standing under California Law and has
the corporate power and authority to own, operate and lease its properties and
to carry on its business as now conducted and as proposed to be conducted. Newco
is a corporation duly organized, validly existing and in good standing under
Delaware Law and has the corporate power and authority to own, operate and lease
its properties and to carry on its business as proposed to be conducted. Newco
has not engaged in any business activity except for matters relating to its
organization and the approval of this Agreement and the transactions
contemplated herein. Parent has delivered to the Company true and complete
copies of the currently effective Articles of Incorporation and Bylaws of Parent
and Newco. Neither Parent nor Newco is in violation of its Articles of
Incorporation or Bylaws.

            3.2 Power, Authorization and Validity.

                 3.2.1 Power and Authority. Parent has the corporate right,
power, legal capacity and authority to enter into and perform its obligations
under this Agreement and the Parent Ancillary Agreements and the transactions
contemplated hereby and thereby. The execution, delivery and performance of this
Agreement and the Parent Ancillary Agreements have been duly and validly
approved and authorized by all necessary corporate action on the part of Parent.
Newco has the corporate right, power, legal capacity and authority to enter into
and perform its obligations under this Agreement and all agreements to which
Newco is or will be a party that are required to be executed pursuant to this
Agreement (the "Newco Ancillary Agreements") and the transactions contemplated
hereby and thereby. The execution, delivery and performance of this Agreement
and the Newco Ancillary Agreements have been duly and validly approved and
authorized by all necessary corporate action on the part of Newco.

                 3.2.2 No Consents. No filing, authorization, approval or
consent, governmental or otherwise, is necessary to enable Parent or Newco to
enter into, and to perform their respective obligations under, this Agreement,
the Parent Ancillary Agreements or the Newco Ancillary Agreements, except for
(a) the filing by Parent of such reports and information with the SEC under the
1934 Act and the rules and regulations promulgated by the SEC thereunder, as may
be required in connection with this Agreement, the Merger and other transactions
contemplated by this Agreement, (b) the filing of the Articles of Merger with
the Secretaries of State of the States of Nevada and Delaware, (c) such filings
as may be required to comply with federal and state securities laws, and (d)
filings required under the HSR Act and the expiration of applicable waiting
periods under the HSR Act.




                                       29
<PAGE>   38


                 3.2.3 Enforceability. This Agreement and the Parent Ancillary
Agreements are, or when executed by Parent will be, valid and binding
obligations of Parent, enforceable against Parent in accordance with their
respective terms, except as to the effect, if any, of (a) applicable bankruptcy
and other similar laws affecting the rights of creditors generally, and (b)
rules of law governing specific performance, injunctive relief and other
equitable remedies; provided, however, that the Articles of Merger and the
Parent Ancillary Agreements will not be effective until the earlier of the
Effective Time or the date provided for therein. This Agreement and the Newco
Ancillary Agreements are, or when executed by Newco will be, valid and binding
obligations of Newco, enforceable against Newco in accordance with their
respective terms, except as to the effect, if any, of (a) applicable bankruptcy
and other similar laws affecting the rights of creditors generally, and (b)
rules of law governing specific performance, injunctive relief and other
equitable remedies; provided, however, that the Articles of Merger and the Newco
Ancillary Agreements will not be effective until the earlier of the Effective
Time or the date provided for therein.

            3.3 No Conflict. Neither the execution and delivery of this
Agreement nor any of the Parent Ancillary Agreements or Newco Ancillary
Agreements by Parent or Newco, nor the consummation of the transactions
contemplated hereby or thereby, will conflict with, or (with or without notice
or lapse of time, or both) result in a termination, breach, impairment or
violation of: (i) any provision of the Articles of Incorporation or Bylaws of
Parent or Newco as currently in effect; (ii) any federal, state, local or
foreign Order, statute, rule or regulation applicable to Parent or Newco or any
of their respective assets or properties; or (iii) any material Contract to
which Parent or any of its subsidiaries (if any) is a party or by which Parent
or any of its subsidiaries (if any) or any of their respective assets or
properties are bound where termination, breach, impairment or violation would
have a Material Adverse Effect on Parent or any of its subsidiaries, taken as a
whole.

            3.4 SEC Filings.

                 3.4.1 Parent has made available to the Company true and
complete copies of each report, registration statement (on a form other than
Form S-8) and definitive proxy statement (in each case excluding copies of
exhibits) filed by Parent with the SEC between December 31, 1998 and the
Agreement Date pursuant to the 1933 Act or the 1934 Act, including without
limitation the Parent 1998 10-K (collectively, the "Parent SEC Documents"). As
of the time it was filed with the Securities and Exchange Commission (the "SEC")
(or, if amended or superseded by a subsequent filing prior to the Agreement
Date, then on the date of such subsequent filing): (i) each of the Parent SEC
Documents complied in all material respects with the applicable requirements of
the Securities Act of 1933, as amended (the "1933 Act") or the Securities
Exchange Act of 1934, as amended (the "1934 Act") (as the case may be); and (ii)
none of the Parent SEC Documents contained any untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

                 3.4.2 The consolidated financial statements (including any
related notes) contained in the Parent SEC Documents: (i) complied as to form in
all material respects with the published rules and regulations of the SEC
applicable thereto; (ii) were prepared in conformity with GAAP applied on a
consistent basis throughout the periods covered (except as may be indicated in
the notes to such financial statements and, in the case of unaudited statements,
as


                                       30
<PAGE>   39

permitted by Form 10-Q of the SEC, and except that unaudited financial
statements may not contain footnotes and are subject to normal and recurring
year-end audit adjustments); and (iii) fairly present the consolidated financial
position of Parent and its subsidiaries as of the respective dates thereof and
the consolidated results of operations and cash flows of Parent and its
subsidiaries for the periods covered thereby.

            3.5 Proceedings; Orders. There is no pending Proceeding against
Parent or any of its subsidiaries before any Governmental Body that, if
determined adversely to Parent or such subsidiary, would have a Material Adverse
Effect on Parent, or that could prevent, enjoin or materially alter or delay the
consummation of the Merger or any other material transaction contemplated by
this Agreement, nor, to Parent's knowledge, has any such Proceeding been
threatened. There is no Order outstanding against Parent or any of its
subsidiaries that would have a Material Adverse Effect on Parent, or that would
prevent or enjoin Parent from consummating the Merger.

            3.6 No Material Adverse Change. Except as set forth in Parent SEC
Documents or Parent press releases filed or issued prior to the date of this
Agreement, since December 31, 1998 there has not been any material adverse
change in the financial condition, properties, assets, liabilities, business,
prospects, results of operations or operations of Parent and its subsidiaries,
taken as a whole. (For purposes of this Section 3.6, the parties agree that a
change in the market price of Parent's common stock shall not, of itself,
constitute a material adverse change of the type described in this Section 3.6).

            3.7 No Brokers. Other than Warburg Dillon Read LLC, whose fees and
expenses will be paid by Parent, Parent is not obligated for the payment of fees
or expenses of any investment banker, broker or finder in connection with the
origin, negotiation or execution of this Agreement or the Articles of Merger or
in connection with any transaction provided for herein or therein.

            3.8 Disclosure. No statement made by Parent in either this
Agreement, its exhibits and the Parent Disclosure Letter, nor any of the
certificates to be delivered by the Parent to Company under this Agreement,
taken together, contains any untrue statement of a material fact or omits to
state any material fact necessary in order to make the statements contained
herein and therein, in light of the circumstances under which such statements
were made, not misleading.

            3.9 Material Adverse Effect. As used with respect to Parent,
Material Adverse Effect shall mean any event, change or effect that is (or will
with the passage of time be) materially adverse to the financial condition,
properties, assets, liabilities, employee base, business, prospects, operations
or results of operations of the Parent and its subsidiaries, taken as a whole,
provided, however, that any change in the market price of Parent's common stock
shall not, of itself, constitute or be considered to cause a Material Adverse
Effect.

            3.10 Knowledge of Parent. As used in this Agreement, the term
"knowledge" of Parent shall mean the actual knowledge, without independent
investigation, of any or all of Michael Margolis, Gilles Godin or Ronald Buckly
prior to the Agreement Date.




                                       31
<PAGE>   40


         4. PRE-CLOSING COVENANTS OF THE COMPANY.

            During the period from the Agreement Date until the earlier to occur
of the (i) Effective Time or (ii) the termination of this Agreement in
accordance with Article 9, the Company and Stockholders covenant to and agree
with Parent as follows:

            4.1 Advice of Changes. The Company and each Stockholder will
promptly advise Parent in writing, to the full extent of such person's
knowledge, (a) of any event occurring subsequent to the Agreement Date that
would render any representation or warranty of the Company or the Stockholders
contained in this Agreement, if made on or as of the date of such event or the
Closing Date, untrue or inaccurate in any material respect and (b) of any
material adverse change in the Company's financial condition, properties,
assets, liabilities, business, financial performance, results of operations or
prospects. The Company will deliver to Parent within fifteen (15) days after the
end of each fiscal quarter and each monthly accounting period ending after the
Agreement Date and before the Closing Date, an unaudited balance sheet and
statement of operations for such period, which financial statements will be
prepared in the ordinary course of the Company's business, consistent with its
past practices in conformity with the Company's books and records and GAAP, and
will present fairly and accurately in all respects the financial position of the
Company at such dates and for such periods.

            4.2 Maintenance of Business. The Company will carry on and preserve
its business and its relationships with creditors, customers, suppliers,
employees and others in substantially the same manner as it has prior to the
Agreement Date. The parties hereto understand and acknowledge that it is their
intent to work closely together during the period from the Agreement Date until
the Closing Date. If the Company or any Stockholder becomes aware of a material
deterioration in the Company's relationship with any creditor, customer,
supplier or key employee, it will promptly bring such information to the
attention of Parent in writing and, if requested by Parent, will exert its
reasonable best efforts to restore such relationship.

            4.3 Conduct of Business. Except as otherwise expressly provided in
this Agreement, as listed in Item 4.3, or as approved or recommended by Parent
in writing, the Company will not without the prior written consent of Parent:

                 (a) borrow any money, or incur any liability or indebtedness
other than in the ordinary course of business;

                 (b) enter into any Contract or transaction not in the ordinary
course of business or involving current or future payments by the Company
(whether fixed, contingent or otherwise), expenses or capital expenditures in
excess of $100,000;

                 (c) grant any lien, security interest, mortgage or other
encumbrance on or interest in any of its assets or properties;

                 (d) except for the Merger, merge, consolidate or reorganize
with, or acquire, or enter into any other business combination with, any
corporation, partnership, limited liability company or any other entity or enter
into any negotiations, discussions or Contract for such purpose;




                                       32
<PAGE>   41

                 (e) sell, transfer or dispose of any of its material assets
except in the ordinary course of business consistent with past practice;

                 (f) enter into any material Contract for the purchase, sale,
lease or license of any property, real or personal, tangible or intangible,
except in the ordinary course of business consistent with past practice, or
enter into any Contract of the types and applicable dollar thresholds described
in Section 2.11;

                 (g) fail to maintain its equipment and other assets in good
working condition and repair according to the standards it has maintained to the
Agreement Date, subject only to ordinary wear and tear;

                 (h) pay any bonus, royalty, increased salary or special
remuneration to any director, officer, employee or consultant (except pursuant
to existing arrangements heretofore disclosed in writing to Parent) or enter
into any new employment or consulting agreement with any officer or key
employee, or enter into any new agreement or plan of the type described in
Section 2.16.4;

                 (i) change any of its accounting methods, except as required by
GAAP;

                 (j) declare, set aside or pay any cash or stock dividend or
other distribution in respect of capital stock, or redeem or otherwise acquire
any of its capital stock or securities convertible or exchangeable for its
capital stock;

                 (k) amend, modify or terminate any Contract to which it is a
party except those amended, modified or terminated in the ordinary course of
business, consistent with past practice, and which are not material in amount or
effect;

                 (l) lend any amount to any person or entity, other than
advances for travel and expenses that are incurred in the ordinary course of
business consistent with past practice, not material in amount, which travel and
expenses shall be documented by receipts for the claimed amounts;

                 (m) guarantee or act as a surety for any debt or obligation
except for the endorsement of checks and other negotiable instruments in the
ordinary course of business, consistent with past practice;

                 (n) waive or release any material right or claim except in the
ordinary course of business, consistent with past practice;

                 (o) issue or sell any shares of its capital stock of any class
or any other of its securities, or issue or create any warrants, obligations,
subscriptions, options, convertible securities, stock appreciation rights or
other commitments to issue shares of capital stock, or accelerate the vesting of
any outstanding option or other security;

                 (p) subdivide or split or combine or reverse split the
outstanding shares of its capital stock of any class or enter into any
recapitalization affecting the number of outstanding shares of its capital stock
of any class or affecting any other of its securities;




                                       33
<PAGE>   42



                 (q) amend its Articles of Incorporation or Bylaws or other
charter documents;

                 (r) agree to any audit assessment by any tax authority or
Governmental Body or file any federal or state income or franchise tax return
unless copies of such returns have been delivered to Parent for its review prior
to filing;

                 (s) grant, sell, license or transfer any of the Company's
technology or any of the Company Intellectual Property, except in the ordinary
course of business consistent with past practice, or take any action which could
have the effect of placing any of the Company Intellectual Property in the
public domain;

                 (t) change any insurance coverage or issue any certificates of
insurance;

                 (u) terminate the employment of any key employee listed in Item
2.10(m);

                 (v) modify or change the exercise or conversion rights or
exercise or purchase prices of any capital stock of the Company, any Company
stock options, warrants or other Company securities, or accelerate or otherwise
modify (i) the right to exercise any option, warrant or other right to purchase
any capital stock or other securities of the Company or (ii) the vesting or
release of any shares of capital stock or other securities of the Company from
any repurchase options or rights of refusal held by the Company or any other
party or any other restrictions unless such accelerations/modifications are
expressly contemplated by this Agreement;

                 (w) agree, whether orally or in writing, to do any of the
things described in the preceding clauses 4.3(a) through 4.3(v).

            4.4 Approval of the Company's Stockholders. The Company shall hold a
stockholders' meeting (the "Company Stockholders' Meeting") as promptly as
reasonable after the date of this Agreement, to submit this Agreement, the
Merger and approval of any related agreements or transactions for the
consideration and approval of the stockholders of the Company, or shall solicit
the written consent of its stockholders at the earliest practicable date, which
approval shall be recommended by the Company's Board of Directors and the
Company shall use its best efforts to obtain such stockholders' approval (the
vote taken at such Company Stockholders' Meeting or by the solicitation of such
written consent of the stockholders of the Company is hereinafter referred to as
the "Company Stockholder Vote"). Such Company Stockholders' Meeting or action by
written consent shall be called, held and conducted, and any proxies or written
consents shall be solicited, in compliance with the Company's Articles of
Incorporation and Bylaws, both as amended, and in compliance with applicable
law. The Company will cause a proxy statement (the "Proxy Statement") to be
delivered to each stockholder of the Company at least ten (10) business days
prior to the taking of the Company Stockholder Vote. The Company will not put
any proposal up for the vote of its stockholders (as part of the Company
Stockholder Vote or otherwise) other than the proposal to approve this Agreement
and the Merger, without obtaining Parent's prior written consent to do so, which



                                       34
<PAGE>   43



consent will not be unreasonably withheld, consistent with the provisions,
purposes and intent of this Agreement.

            4.5 Proxy Statement. The Company will be solely responsible for any
statement, information or omission in the Proxy Statement relating to the
Company or its affiliates.

            4.6 Regulatory Approvals. The Company will promptly execute and
file, or join in the execution and filing, of any application, notification
(including without limitation any notification or provision of information, if
any, that may be required under the HSR Act) or any other document that may be
necessary in order to obtain the authorization, approval or consent of any
Governmental Body, whether federal, state, local or foreign, which may be
required, or which Parent may reasonably request, in connection with the
consummation of the Merger or any other Transactions. The Company will use its
diligent efforts to obtain, and to cooperate with Parent to promptly obtain, all
such authorizations, approvals and consents.

            4.7 Acceleration of Company Options. The Company will duly and
validly accelerate all Company Options prior to the Effective Time.

            4.8 Necessary Consents. The Company will use its best efforts to
obtain such written consents and take such other actions as may be necessary or
appropriate to facilitate and allow the consummation of the Transactions and to
facilitate and allow Parent to carry on the Company's business after the
Effective Time substantially as such business was conducted by the Company prior
to the Effective Time.

            4.9 Proceedings and Orders. The Company will notify Parent in
writing promptly after learning of (i) any Proceeding by or before any court or
other Governmental Body, initiated by or against it, or known by it to be
threatened against the Company or any of its officers, directors, employees or
stockholders in their capacity as such; or (ii) any Order relating to the
Company.

            4.10 No Other Negotiations. From and after the Agreement Date until
the earlier of the Effective Time or termination of this Agreement pursuant to
Article 9, the Company and the Stockholders shall not, and will instruct their
respective representatives not to, directly or indirectly, (x) solicit, initiate
or knowingly or recklessly encourage the making, submission or announcement of,
any Acquisition Proposal by any person, entity or group (other than Parent and
its representatives), or (y) participate in any discussions or negotiations
with, or disclose any non-public information concerning the Company to, or
afford any access to the properties, books or records of the Company to, or
otherwise assist or facilitate, or enter into any Contract, agreement or
understanding with, any person, entity or group (other than Parent and its
representatives), in connection with any Acquisition Proposal with respect to
the Company. Without limiting the generality of the foregoing, the Company and
the Stockholders acknowledge and agree that any violation of any of the
restrictions set forth in the preceding sentence by any representative of the
Company or any Stockholder shall be deemed to constitute a breach of this
Section 4.10 by the Company. For the purposes of this Agreement, an "Acquisition
Proposal" with respect to an entity means any proposal or offer relating to (i)
any merger, consolidation, sale of substantial assets or similar transactions
involving the entity or any subsidiaries of the entity (other than sales or
licenses of assets or inventory in the ordinary course 



                                       35
<PAGE>   44


of business or as permitted under the terms of this Agreement), (ii) sale of 10%
(or 20% for purposes of Section 9.3(c)) or more of the outstanding shares of
capital stock of the entity (including without limitation by way of a tender
offer or an exchange offer), (iii) the acquisition by any person of beneficial
ownership or a right to acquire beneficial ownership of, or the formation of any
"group" (as defined under Section 13(d) of the 1934 Act and the rules and
regulations thereunder) which beneficially owns, or has the right to acquire
beneficial ownership of, 10% (or 20% for purposes of Section 9.3(c)) or more of
the then outstanding shares of capital stock of the entity (except for
acquisitions for passive investment purposes only in circumstances where the
person or group qualifies for and files a Schedule 13G with respect thereto);
(iv) any initial public offering of capital stock or other securities of the
Company pursuant to a registration statement filed under the 1933 Act; or (v)
any public announcement of a proposal, plan or intention to do any of the
foregoing or any agreement to engage in any of the foregoing (any such
transaction listed in (i)-(v) when consummated with an entity other than Parent
to be referred to as an "Alternative Transaction"). The Company and the
Stockholders will immediately cease any and all existing activities, discussions
or negotiations with any parties conducted heretofore with respect to any
Acquisition Proposal. The Company or a Stockholder will (A) notify Parent as
promptly as practicable if it receives any proposal or written inquiry or
written request for the Company in connection with an Acquisition Proposal or
potential Acquisition Proposal and (B) as promptly as practicable notify Parent
of the significant terms and conditions of any such Acquisition Proposal, as
well as the identity of the third party submitting such Acquisition Proposal. In
addition, from and after the Agreement Date until the earlier of the Effective
Time and termination of this Agreement pursuant to Article 9, the Company will
not, and will instruct its representatives not to, directly or indirectly, make
or authorize any public statement, recommendation or solicitation in support of
any Acquisition Proposal made by any person, entity or group (other than
Parent).

            4.11 Access to Information. Until the Closing Date, the Company will
provide Parent and its agents with full access to the files, books, records,
documents, personnel and offices of the Company, including, without limitation,
any and all information relating to the Company's Taxes, Contracts, real,
personal and intangible property, and financial condition, necessary for Parent
to complete its diligence review of the Company's products and technology,
subject to the terms of the Mutual Nondisclosure Agreement between Parent and
Company dated December 15, 1998, as amended to date (the "Mutual Nondisclosure
Agreement"). The Company will cause its accountants to cooperate with Parent and
its agents in making available all financial information requested, including,
without limitation, the right to examine all working papers pertaining to all
financial statements prepared or audited by such accountants.

            4.12 Satisfaction of Conditions Precedent. The Company and the
Stockholders will use their reasonable best efforts to satisfy or cause to be
satisfied all the conditions precedent that are set forth in Article 8, and the
Company will use its best efforts to cause the Transactions to be consummated,
and, without limiting the generality of the foregoing, to obtain all consents,
waivers and authorizations of third parties and to make all filings with, and
give all notices to, third parties that may be necessary or required on its part
in order to effect the transactions provided for herein. In particular, the
Company will use its best efforts to cause the Merger to become effective in
accordance with this Agreement not later than May 31, 1999.




                                       36
<PAGE>   45



            4.13 Securities Laws. The Company and the Stockholders shall assist
Parent to the extent necessary to comply with the securities and blue sky laws
of all jurisdictions applicable in connection with the Merger.

            4.14 Notification of Employee Problems. The Company will promptly
notify Parent if any of the Company's directors or officers becomes aware that
any of the employees listed in Item 2.10(m) intends to leave its employ.

            4.15 Company Dissenting Shares. As promptly as practicable after the
date of the Company Stockholder Vote and prior to the Closing Date, the Company
will furnish Parent with the name and address of each holder (or potential
holder) of any Company Dissenting Shares and the number of Company Dissenting
Shares (or potential Company Dissenting Shares) owned by each such holder.

            4.16 Termination of Registration and Voting Rights. All registration
rights agreements and voting agreements and proxies applicable to or affecting
any outstanding shares or other securities of the Company (other than the Voting
Agreements and the related Proxies referred to in Section 2.24) will be duly
terminated and canceled by no later than immediately prior to the Effective
Time.

            4.17 Invention Assignment and Confidentiality Agreements. The
Company will obtain from each employee, contractor and consultant of the Company
who has had access to any software, technology or copyrightable, patentable or
other proprietary works owned or developed by the Company, including but not
limited to Company Intellectual Property, or to any other confidential or
proprietary information of the Company or its clients, an invention assignment
and confidentiality agreement in a form acceptable to Parent, duly executed by
such employee, contractor or consultant and delivered to the Company.

            4.18 Company Employee Plans and Benefit Arrangements. The Company
shall take all such actions as contemplated under Section 1.3(b) with respect to
the Company Options. The Company shall not issue any shares of its capital stock
under any employee benefit plan and shall terminate any Company Benefit
Arrangement that is governed by Section 401(k) of the Code immediately prior to
the Effective Time upon the request of Parent. The Company agrees to cooperate
with Parent after the Effective Time to complete any steps necessary to finalize
the plan termination, including but not limited to distribution of plan assets.
In the event that the distribution or rollover of assets from the trust of a
Code Section 401(k) plan that is terminated will trigger liquidation, surrender
or other fees that will be imposed on the terminated plan or any participant or
beneficiary of such terminated plan, the Company shall take such actions as are
necessary to reasonably estimate the amount of such fees and provide such
reasonable estimate in writing to Parent prior to the Effective Time. Any
Company Benefit Arrangement that is governed by Section 401(k) of the Code and
relies on a standardized prototype document shall be amended prior to the
Effective Time so as not to require all corporations that are members of the
same controlled group of corporations as the employer sponsoring such plan to
participate in such plan. The Company shall file any delinquent Form 5500s
through the Department of Labor Delinquent Filer Voluntary Compliance Program
prior to the Effective Time.

            4.19 Takeover Statutes. If any fair price, moratorium, control share
acquisition or other similar takeover statute shall become applicable to any of
the Transactions, the



                                       37
<PAGE>   46


Company and the members of the Board of Directors of the Company shall grant
such approvals and take such actions as are necessary so that the Merger and the
other Transactions may be commenced as promptly as practicable on the terms
contemplated hereby and otherwise act to eliminate or minimize the effects of
such statute or regulation on the Transaction.

            4.20 Closing of Merger. The Company and the Significant Stockholders
will not refuse to effect the Merger if, on or before the Closing Date, all the
conditions precedent to the Company's obligations to effect the Merger under
Article 7 hereof have been satisfied or waived by the Company and Parent elects
to consummate the Merger.

            4.21 Termination of Management Agreement. The Company will duly and
validly terminate prior to the Effective Time the Management Agreement or any
similar agreements with Teknekron Corporation without any further obligation or
liability to the Company or Parent.

         5. COVENANTS OF PARENT.

            During the period from the Agreement Date until the earlier to occur
of (i) the Effective Time or (ii) the termination of this Agreement in
accordance with Article 9, Parent covenants to and agrees with the Company as
follows:

            5.1 Advice of Changes. Parent will promptly advise the Company in
writing of any event occurring subsequent to the Agreement Date that would
render any representation or warranty of Parent or Newco contained in this
Agreement, if made on or as of the date of such event or the Closing Date, to be
untrue or inaccurate in any material respect.

            5.2 Satisfaction of Conditions Precedent. Parent will use its
reasonable best efforts to satisfy or cause to be satisfied all the conditions
precedent that are set forth in Article 7, and Parent will use its best efforts
to cause the Transactions to be consummated, and, without limiting the
generality of the foregoing, to obtain all consents, waivers and authorizations
of third parties and to make all filings with, and give all notices to, third
parties that may be necessary or required on its part in order to effect the
Transactions. In particular, Parent will use its best efforts to cause the
Merger to become effective in accordance with this Agreement not later than May
31, 1999.

            5.3 Regulatory Approvals. Parent will promptly execute and file, or
join in the execution and filing, of any application, notification (including
without limitation any notification or provision of information, if any, that
may be required under the HSR Act) or other document that may be necessary in
order to obtain the authorization, approval or consent of any Governmental Body,
whether federal, state, local or foreign, that may be reasonably required, in
connection with the consummation of the Merger or any other Transaction. Parent
will use diligent efforts to obtain all such authorizations, approvals and
consents.

         6. CLOSING MATTERS.

            6.1 The Closing. Subject to termination of this Agreement as
provided in Article 9 below, the Closing will take place at the offices of Bryan
Cave LLP, 120 Broadway, Suite 500, Santa Monica, California 90404 at 10:00 a.m.,
Pacific Time, on or before June 11, 1999, or, if all conditions to Closing have
not been satisfied or waived by such date, such other



                                       38
<PAGE>   47


place, time and date as the Company and Parent may mutually select (the "Closing
Date"). Prior to or concurrently with the Closing, the Articles of Merger and
such officers' certificates or other documents as may be required to effectuate
the Merger will be filed in the office of the Secretaries of State of the States
of Nevada and Delaware. Accordingly, the Merger will become effective at the
Effective Time.

         7. CONDITIONS TO OBLIGATIONS OF THE COMPANY.

            The Company's obligations under this Agreement are subject to the
fulfillment or satisfaction, on and as of the Closing, of each of the following
conditions (any one or more of which may be waived by the Company, but only in a
writing signed on behalf of the Company by its Chief Executive Officer):

            7.1 Accuracy of Representations and Warranties. The representations
and warranties of Parent set forth in Article 3 (as qualified by the Parent
Disclosure Letter) shall be true and accurate in all material respects on and as
of the Agreement Date and the Closing Date as if made on and as of the Closing
Date, and the Company shall have received a certificate to such effect executed
on behalf of Parent by an executive officer of Parent (except for any such
representations or warranties that, by their terms, speak only of a specific
date or dates, in which case such representations and warranties shall be true
and correct on and as of such specified date or dates).

            7.2 Covenants. Parent shall have performed and complied in all
material respects with all of its covenants contained in Article 5 on or before
the Closing Date, and the Company shall have received a certificate to such
effect executed on behalf of Parent by an executive officer of Parent.

            7.3 Requisite Approvals. The Merger and the principal terms of this
Agreement shall have been duly and validly approved and adopted by the Company's
stockholders, in accordance with applicable laws and Company's Articles of
Incorporation and Bylaws. The principal terms of this Agreement will have been
duly and validly approved and adopted by Parent's Board of Directors in
accordance with applicable laws and Parent's Articles of Incorporation and
Bylaws. The principal terms of this Agreement will have been approved and
adopted by Newco's Board of Directors and sole stockholder in accordance with
applicable law and Newco's Articles of Incorporation and Bylaws.

            7.4 Compliance with Law; No Legal Restraints; No Litigation. No
litigation or Proceeding will be threatened or pending for the purpose or with
the probable effect of enjoining or preventing the consummation of the Merger or
any of the other material transactions contemplated by this Agreement. There
will not be issued or enacted or adopted, or threatened in writing by any
Governmental Body, any Order, legislative enactment, statute, regulation or
Proceeding by any court, arbitrator, arbitration panel or Governmental Body or
any other fact or circumstance, that, directly or indirectly, challenges,
threatens, prohibits, enjoins, restrains, suspends, delays, conditions or
renders illegal or imposes limitations on (or involves a challenge, threat to,
or a prohibition, injunction, restraint, suspension, delay or illegality of, or
to impose limitations on) the Merger or any other material transaction
contemplated by this Agreement.




                                       39
<PAGE>   48

            7.5 Government Consents; HSR Act Compliance. There shall have been
obtained at or prior to the Closing Date such permits, consents or
authorizations, and there shall have been taken such other actions, as may be
required to consummate the Merger by any regulatory authority or Governmental
Body having jurisdiction over the parties and the actions herein proposed to be
taken, including but not limited to satisfaction of all requirements under
applicable federal and state securities laws and the expiration or termination
of the waiting period under the HSR Act.

            7.6 Documents. The Company shall have received all written consents,
assignments, waivers, authorizations or other certificates reasonably deemed
necessary by the Company's legal counsel to consummate the transactions provided
for in this Agreement and the Articles of Merger.

            7.7 Opinion of Parent's Counsel. The Company shall have received
from Fenwick & West LLP, counsel to Parent and Newco, an opinion substantially
in the form of Exhibit 7.7.

            7.8 Agreements. Parent shall have duly executed and delivered the
Escrow Agreement and the Note and Security Agreement.

            7.9 No Material Adverse Change. There will not have been any
material adverse change in the financial condition, properties, assets,
liabilities, business, employee base, results of operations or prospects of
Parent and its subsidiaries, taken as a whole, since the Agreement Date, and the
Company shall have received a certificate to such effect executed on behalf of
Parent by an executive officer of Parent. The parties agree that a change in the
market price of Parent's common stock shall not, of itself, constitute a
material adverse change of the type described in this Section 7.9.

         8. CONDITIONS TO OBLIGATIONS OF PARENT AND NEWCO.

            The obligations of Parent and Newco under this Agreement are subject
to the fulfillment or satisfaction on, and as of the Closing, of each of the
following conditions (any one or more of which may be waived by Parent, but only
in a writing signed on behalf of Parent by its Chief Executive Officer):

            8.1 Accuracy of Representations and Warranties. The representations
and warranties of the Company and the Stockholders set forth in Article 2 (as
qualified by the Company Disclosure Letter) shall be true and accurate in all
material respects on and as of the Agreement Date and the Closing Date as if
made on and as of the Closing Date, and Parent shall have received a certificate
to such effect executed on behalf of the Company by its Chief Executive Officer
(except for any such representations or warranties that, by their terms, speak
only as of a specific date or dates, in which case such representations and
warranties shall be true and correct on and as of such specified date or dates).

            8.2 Covenants; No Material Adverse Change. The Company and the
Stockholders shall have performed and complied in all material respects with all
of the covenants contained in Article 4 on or before the Closing and Parent
shall have received a certificate to such effect signed on behalf of the Company
by its Chief Executive Officer. There shall not



                                       40
<PAGE>   49


have occurred any material adverse change in the financial condition,
properties, assets, liabilities, business, employee base, results of operations,
operations or prospects of the Company since the Agreement Date, and Parent
shall have received a certificate to such effect executed on behalf of the
Company by its Chief Executive Officer.

            8.3 Compliance with Law; No Legal Restraints; No Litigation. There
shall be no Order by any court or other Governmental Body or threat thereof, or
any other fact or circumstance, which would prohibit or render illegal the
transactions provided for in this Agreement. No litigation or Proceeding shall
be pending or threatened which will have the probable effect of enjoining or
preventing the consummation of any of the transactions provided for in this
Agreement. No litigation, Proceeding or Order shall be pending or threatened
that could reasonably be expected to have a Material Adverse Effect on the
Company that has not been previously disclosed to Parent.

            8.4 Government Consents; HSR Act Compliance. There shall have been
obtained at or prior to the Closing Date such permits, consents or
authorizations and there shall have been taken such other action, as may be
required to consummate the Merger by any regulatory authority or Governmental
Body having jurisdiction over the parties and the actions herein proposed to be
taken, including but not limited to satisfaction of all requirements under
applicable federal and state securities laws and the expiration or termination
of the waiting period under the HSR Act.

            8.5 Opinion of the Company's Counsel. Parent shall have received
from Bryan Cave LLP, counsel to the Company and the Stockholders, an opinion
substantially in the form of Exhibit 8.5.

            8.6 Requisite Approvals. The terms of this Agreement and the
Articles of Merger shall have been approved and adopted by: (a) the Company's
Board of Directors and (b) the written consent or affirmative vote of
stockholders of the Company as described in Section 2.25.

            8.7 Restriction on Dissenting Shares. The number of the outstanding
shares of Company Common Stock that have not affirmatively voted in favor of the
Merger and are eligible to exercise or perfect any statutory appraisal rights of
dissenting stockholders under applicable law will not exceed that number of such
shares that represented five percent (5%) of the shares of the Company Common
Stock outstanding on the Record Date (as defined in Section 2.25).

            8.8 Documents. Parent shall have received duly executed copies of
all written consents, assignments, waivers, authorizations or other certificates
deemed necessary by Parent's legal counsel to provide for the continuation in
full force and effect of any and all material Contracts of the Company and its
subsidiaries, and for Parent to consummate the transactions provided for in this
Agreement and the Articles of Merger.

            8.9 Escrow Agreement. The Representatives and the Escrow Agent shall
have duly executed and delivered to Parent the Escrow Agreement.




                                       41
<PAGE>   50


            8.10 Non-Competition Agreements. Each person or entity listed on
Schedule 8.10 shall have duly executed and delivered to Parent a Non-Competition
Agreement.

            8.11 Continued Employment of Certain Personnel. Each of the
employees listed on Schedule 8.11 who are currently employees of the Company,
(a) shall have continued to be employed as full-time employees of the Company at
all times from the Agreement Date through the Effective Time and (b) shall have
accepted offers of continued employment with the Company following the Effective
Time pursuant to written employment offer letters or agreements satisfactory to
Parent in which such persons will have agreed to continue to be full-time
employees of the Company for a period of not less than two (2) years after the
Effective Time except as approved by Parent. Not less than 80% of the Company's
employees as of the Agreement Date shall remain employed by the Company on the
Closing Date.

            8.12 Resignation of Directors. The directors of the Company in
office immediately prior to the Effective Time of the Merger will have resigned
as directors in writing effective as of the Effective Time.

            8.13 Due Diligence. Parent and its representatives shall have
completed a due diligence review of the condition (financial and otherwise),
operations, customer arrangements, intellectual property, business and prospects
of, and any other matters relating to, the Company, and the results of such due
diligence shall be satisfactory to Parent in its sole discretion.

         9. TERMINATION.

            9.1 Termination. This Agreement may be terminated at any time prior
to the Effective Time, whether before or after approval of the Merger by the
stockholders of the Company:

                 (a) by the mutual written agreement of Parent and the Company;

                 (b) at any time after ninety days after the Agreement Date, by
either Parent or the Company if the Closing shall not have occurred on or before
such date and such failure to consummate is not caused by a breach of this
Agreement by the terminating party;

                 (c) by the Company, if (i) there has been a breach by Parent of
any representation, warranty, covenant or agreement set forth in this Agreement
on the part of Parent, or if any representation of Parent will have become
untrue, in either case which has or can reasonably be expected to have a
Material Adverse Effect on Parent or (ii) the Company reasonably determines that
the timely satisfaction of any condition set forth in Article 7 has become
impossible or impracticable (other than as a result of the Company's or any
Stockholder's failure to comply with or perform its covenants or obligations
under this Agreement or any Company Ancillary Agreement or Stockholder Ancillary
Agreement), provided, however, that if such breach or failure of condition shall
be curable by Parent, then the Company may not terminate this Agreement unless
Parent fails to cure within thirty (30) days after written notice thereof from
the Company (except that no cure period will be provided for a breach by Parent
which by its nature cannot be cured);

                 (d) by Parent, if (i) there has been a breach by the Company or
a Stockholder of any representation, warranty, covenant or agreement set forth
in this Agreement



                                       42
<PAGE>   51


(other than a breach of Section 4.10) on the part of the Company or a
Stockholder, or if any representation of the Company or a Stockholder will have
become untrue, in either case which has or can reasonably be expected to have a
Material Adverse Effect on the Company or (ii) Parent reasonably determines that
the timely satisfaction of any condition set forth in Article 8 has become
impossible or impracticable (other than as a result of the Parent's failure to
comply with or perform its covenants or obligations under this Agreement or any
Parent Ancillary Agreement); provided, however, that if such breach or failure
of condition shall be curable by the Company or a Stockholder, as the case may
be, then Parent may not terminate this Agreement unless the Company or such
Stockholder fails to cure within thirty (30) days after written notice thereof
(except that no cure period will be provided for a breach by the Company or a
Stockholder which by its nature cannot be cured);

                 (e) by Parent, if there is a breach of Section 4.10;

                 (f) by either Parent or the Company, if a permanent injunction
or other Order by any federal or state court that would make illegal or
otherwise restrain, enjoin or prohibit the consummation of the Merger will have
been issued and will have become final and nonappealable;

                 (g) by either Parent or the Company, if any approval of the
stockholders of the Company required for the consummation of the Merger
submitted for approval shall not have been obtained by reason of the failure to
obtain the required vote at a duly held meeting of stockholders or at any
adjournment thereof;

                 (h) by Parent, if any of the following shall occur:

                     (i) the Company shall have failed to include in the Proxy
Statement the unanimous recommendation of the Board of Directors of the Company
in favor of approval and adoption of this Agreement and the Merger, or the Board
of Directors of the Company shall have amended or modified in a manner adverse
to Parent such Board of Directors' unanimous recommendation in favor of the
Merger or approval or adoption of this Agreement;

                     (ii) the Board of Directors of the Company shall have
approved, publicly endorsed, recommended or executed a letter of intent or
similar document with respect to any Acquisition Proposal other than the Merger;

                     (iii) a tender or exchange offer relating to securities of
the Company shall have been commenced and the Company shall not have sent to its
stockholders, within ten (10) business days after the commencement of such
tender or exchange offer, a statement that the Company recommends rejection of
such tender or exchange offer; or

                     (iv) an Acquisition Proposal (other than a tender or
exchange offer relating to the securities of the Company) is publicly announced,
and, upon Parent's request, the Company fails to issue a press release
announcing its opposition to such Acquisition Proposal within five (5) business
days after such request; or




                                       43
<PAGE>   52



                 (i) by Parent, in the event of a tender or an exchange offer
relating to the securities of the Company which is accepted by more than fifty
percent (50%) of the outstanding shares of the Company Common Stock.

                 Any termination of this Agreement under this Section 9.1 will
be effective by the delivery of written notice of the terminating party to the
other party hereto.

            9.2 Effect of Termination. If this Agreement is validly terminated
pursuant to Section 9.1, except as otherwise provided in this Article 9, such
termination shall be without liability or obligation of either party (or any
stockholder, director, officer, employee, agent, consultant or representative of
such party) to the other party to this Agreement (except that the parties to
this Agreement shall under all circumstances remain bound by the terms and
provisions of the Mutual Nondisclosure Agreement); provided that if such
termination shall result from the willful failure of either party to fulfill a
condition to the performance of the obligations of the other party or to perform
a covenant of this Agreement or from a willful breach by either party to this
Agreement, such party shall be fully liable for any and all damages incurred or
suffered by the other party as a result of such failure or breach. The
provisions of this Section 9.2, Sections 9.3 and 9.4 and Article 11 shall
survive any termination hereof pursuant to Section 9.1.

            9.3 Termination Fee.

            If this Agreement is terminated pursuant to Section 9.1, all further
obligations of the parties under this Agreement shall terminate; provided,
however, that:

                 (a) the parties shall, in all events, remain bound by and
continue to be subject to the applicable provisions set forth in Section 9.2 and
Article 11;

                 (b) if this Agreement is terminated by Parent pursuant to
Section 9.1(e), (g), (h) or (i), then the Company shall pay to Parent, in cash,
a non-refundable fee in the amount of $8,000,000 (the "Termination Fee"), within
twenty (20) days of such termination;

                 (c) if, within 180 days of any termination of this Agreement
pursuant to Section 9.1(d)(i), the Company shall engage in any Alternative
Transaction, as defined in Section 4.10, then the Company shall pay to Parent
the Termination Fee in cash within three (3) business days after the effective
date of such Alternative Transaction;

                 (d) the parties shall, in all events, remain bound by the terms
and provisions of the Mutual Nondisclosure Agreement; and

                 (e) both Parent and the Company shall be entitled to announce
the termination of this Agreement.

            9.4 Non-Exclusivity of Termination Rights. The termination rights
and obligations provided in this Article 9 shall not be deemed to be exclusive,
provided, however, that the payment of the Termination Fee pursuant to Sections
9.3(b) and (c) hereof shall be Parent's exclusive remedy in the event of a
termination of this Agreement pursuant to Sections 9.3(b) and (c) in which the
Termination Fee is paid.




                                       44
<PAGE>   53



         10. SURVIVAL OF REPRESENTATIONS, INDEMNIFICATION AND REMEDIES,
CONTINUING COVENANTS.

            10.1 Survival. The representations, warranties, covenants and
agreements of the parties hereto contained in this Agreement or in any
certificate, document or instrument delivered pursuant hereto or in connection
herewith will remain operative and in full force and effect, regardless of any
investigation made by the parties, until the one year anniversary of the Closing
Date (the "Expiration Date"); provided, however, that the representations and
warranties contained in Sections 2.8 and 2.16 shall survive until the expiration
of the statute of limitations for any claims made thereunder; and provided
further that the representation and warranties made by Parent in Article 3 shall
survive until the later of (i) the Expiration Date or (ii) the payment in full
of the Notes.

            10.2 Indemnification by Significant Stockholders. Subject to the
limitations set forth in this Section 10.2, the Significant Stockholders hereby
severally indemnify and hold harmless Parent and its respective officers,
directors, agents and employees, and each person, if any, who controls or may
control Parent within the meaning of the 1933 Act (collectively, "Parent
Indemnified Parties") from and against any and all claims, demands, actions,
causes of action, judgments, fines, penalties, obligations, losses, costs,
damages, liquidated damages, liabilities and expenses including, without
limitation, the reasonable fees and disbursements of legal counsel,
investigators, consultants, accountants and other professionals (collectively,
"Damages") incurred or suffered by any such Parent Indemnified Party arising
from, by reason of or in connection with, any misrepresentation or breach of or
default in connection with any of the representations, warranties, covenants or
agreements given or made by the Company or any Stockholder in this Agreement or
any certificate, document or instrument delivered by or on behalf of the Company
or by a Company stockholder pursuant hereto or in connection herewith; provided,
however, that the maximum aggregate indemnification obligation of the
Significant Stockholders as a group under this Article 10 shall not exceed (a)
the aggregate gross amount of the Per Share Payments payable to the Significant
Stockholders as a group under Sections 1.3(a)(ii) and 1.3(b)(i) for all Damages
arising out of or relating to the breach of any representation or warranty set
forth in Section 2.1, 2.2 or 2.3; (b) $36,000,000 for all Damages arising out of
or relating to the breach of any representation or warranty set forth in Section
2.6; (c) an aggregate of $36,000,000 for all Damages arising out of or relating
to the breach of any representation or warranty set forth in Sections 2.8 or
2.16; (d) $41,000,000 for all Damages arising out of or relating to the breach
of any representation or warranty set forth in Section 2.13; or (e) an aggregate
of $14,400,000 for all Damages arising out of or relating to the breach of any
representation or warranty set forth in any Section of Article 2 other than
those Sections described in the foregoing clauses or Damages covered by the last
sentence of this Section 10.2, the maximum individual indemnification obligation
of each Significant Stockholder shall not exceed the gross consideration payable
under Section 1.3 to such Significant Stockholder, and all indemnification
obligations of the Significant Stockholders under this Article 10 shall be
allocated proportionally among the Significant Stockholders pro rata based on
the gross consideration payable to each Significant Stockholder under Section
1.3. The Significant Stockholders shall settle any claims for indemnification by
first returning to Parent Notes from the Escrow, and if the aggregate amount of
Damages exceeds the value of such escrowed Notes, then the Significant
Stockholders shall severally fulfill such indemnification obligations in cash or
Notes. The indemnification provided for in this Section 10.2 shall not apply
unless and until



                                       45
<PAGE>   54


the aggregate Damages for which one or more Indemnified Persons seeks or has
sought indemnification hereunder exceeds a cumulative aggregate of $2,000,000,
in which event the Significant Stockholders shall, subject to the foregoing
limitations, be obligated to indemnify the Parent Indemnified Parties in
accordance with this Section 10.2 for any and all such Damages relating back to
the first dollar of Damages. None of the provisions of this Section 10.2 or of
the Escrow Agreement shall limit liability with respect to (i) claims of
intentional misrepresentation or fraud, (ii) any criminal matters, or (iii) any
claim concerning title to the shares of the Company's capital stock, provided,
however, that by agreement to the Merger, each Company stockholder agrees
severally to indemnify Parent from and against all Damages relating to any
breach of the representations or warranties set forth in Section 2.1.4 with
respect to the shares of Company Common Stock surrendered by such Company
Stockholder at the Closing or concerning title to the Company's capital stock,
and further provided, that the maximum indemnification obligation of any Company
stockholder under this Section 10.2 shall not exceed the gross amount payable
under Section 1.3 to such Company stockholder, and that all such liability for
indemnification under this Article 10 shall be several. Notwithstanding the
foregoing, neither the Company nor any Significant Stockholder shall have any
liability to Parent for Damages arising out of or relating to the breach by any
other Significant Stockholder of an Employment Agreement or a Non-Competition
Agreement to which such breaching stockholder is a party. Any reference herein
to the "gross amount or consideration payable" under Section 1.3 or a specific
subsection thereof, or words to such effect, shall include in determining the
gross amount amounts reduced or offset for Escrow Amounts, Promissory Notes paid
down by the Parent under Section 1.3(a)(iii) or exercise price of Company
Options which are bought out by Parent under Section 1.3(b), as is applicable to
a specific stockholder or group of stockholders.

            10.3 Indemnification by Parent. Parent shall indemnify and hold
harmless the Significant Stockholders (collectively, the "Company Indemnified
Parties", which together with the Parent Indemnified Persons are referred to as
the "Indemnified Parties") from and against any and all Damages arising out of
or relating to any misrepresentation or breach or default in connection with any
of the representations, warranties, covenants or agreements given or made by
Parent in this Agreement or in any certificate, document or instrument delivered
by or on behalf of Parent pursuant hereto or in connection herewith; provided,
however, that the maximum aggregate indemnification obligation of Parent under
this Article 10 (the "Parent Cap") shall not exceed $5 million, except for
Damages arising out of or relating to the breach of any representation or
warranty set forth in Sections 3.1, 3.2 or 3.3, as to which the Parent Cap shall
not be applicable. The indemnification provided for in this Section 10.3 shall
not apply unless and until the aggregate Damages for which one or more Company
Indemnified Parties seeks or has sought indemnification hereunder exceeds a
cumulative aggregate of $1,000,000, in which event Parent, subject to the
foregoing limitations, shall be obligated to indemnify the Company Indemnified
Parties in accordance with this Section 10.3 for any and all such Damages
relating back to the first dollar of Damages.

            10.4 Procedures. Thomas Loo and Gary Crockett shall act as
Representatives of the Significant Stockholders for all purposes of the Escrow
Agreement and the indemnification provisions of this Article 10, are duly
authorized to be such Representatives and may bind the Significant Stockholders
with respect thereto. Promptly after the receipt by an Indemnified Party of
notice or discovery of any claim, damage or legal action or proceeding giving
rise to indemnification rights under this Agreement, such Indemnified Party
shall give the



                                       46
<PAGE>   55


party from whom indemnification is sought (the "Indemnifying Party") and the
Escrow Agent written notice of such claim, damage, legal action or proceeding (a
"Claim"). A Parent Indemnified Party shall give notice of a Claim (a "Notice of
Claim") to the Significant Stockholders by delivering such Notice of Claim to
either of the Representatives. An Indemnified Party may assert a Claim at any
time prior to the expiration of the applicable survival period in Section 10.1.
No delay on the part of an Indemnified Party in giving an Indemnifying Party a
Notice of Claim will relieve such Indemnifying Party of any of its obligations
under this Article 10 (provided that such Notice of Claim is timely given prior
to the expiration of the applicable survival period in Section 10.1) unless (and
then only to the extent) that such Indemnifying Party is materially prejudiced
thereby. Within twenty (20) days of delivery of such written notice, the
Indemnifying Party may, at the expense of such Indemnifying Party, elect to take
all necessary steps properly to contest any Claim involving third parties or to
prosecute such Claim to conclusion or settlement satisfactory to the Indemnified
Party, both as set forth in Section 10.5 herein, or notify the Indemnified Party
in writing that it disputes the claim for indemnity.

            10.5 Third-Party Claims. The following procedures shall apply to
claims for indemnification by an Indemnified Party with respect to Third Party
Claims (as defined herein).

                 10.5.1. Following the Closing, promptly following receipt of
verbal or written notice to Parent or to any other Indemnified Party of a Third
Party Claim (as defined below), such Indemnified Party shall give a Notice of
Claim regarding such Third Party Claim to the Indemnifying Party and if
applicable the Escrow Agent. A "Third Party Claim" means any claim, demand,
suit, action, arbitration, investigation, inquiry or proceeding brought by a
third party against such Indemnified Party that is based upon, or includes
assertions that would, if true, constitute: (a) any inaccuracy,
misrepresentation, breach of, or default in, any of the representations,
warranties or covenants given or made by the Company or the Stockholders in this
Agreement or in the Company Disclosure Letter or in any certificate delivered by
or on behalf of the Company or the Stockholders or an officer of the Company
pursuant thereto (if such inaccuracy, misrepresentation, breach or default
existed at the Closing Date); or (b) any untrue statement of a material fact in
the Proxy Statement or omission of any material fact from the Proxy Statement
necessary in order to make the statements in the Proxy Statement, in light of
the circumstances under which such statements were made, not misleading.

                 10.5.2. If a Third-Party Claim shall be brought or asserted
against Parent or any other Parent Indemnified Party and such Third-Party Claim,
if determined adversely to such Indemnified Party, would entitle such
Indemnified Party to indemnity against any liability, damages and expenses
claimed or reasonably likely to be incurred in or as a result of such
Third-Party Claim pursuant to this Article 10, then, subject to the terms and
conditions of this Agreement, the Representatives will have the right, at the
Representatives' sole option, and at the Significant Stockholders' sole cost and
expense without right of reimbursement from the Escrow Amount, Parent or from
any other Indemnified Parties, to assume and control the defense of all
Indemnified Parties against such Third-Party Claim with reputable legal counsel
of the Representatives' choice that is reasonably satisfactory to Parent and the
affected Indemnified Party(s), so long as: (A) the Representatives notify Parent
and each affected Indemnified Party in writing that Representatives will assume
and control the defense of such Third-Party Claim within twenty (20) days after
Parent has given a Notice of Claim to the Representatives with respect to such
Third-Party Claim; (B) the Representatives conduct the defense of the
Third-



                                       47
<PAGE>   56


Party Claim actively and diligently at all times; and (C) the legal counsel
chosen by the Representatives do not have any conflict of interest in
representing the interests of Parent or any of the affected Indemnified
Party(s).

                 10.5.3. So long as the Representatives are conducting the
defense of the Third-Party Claim in accordance with Section 10.5.2 above: (A)
Parent and each Indemnified Party may retain separate co-counsel and participate
in the defense of the Third-Party Claim at its own cost and expense and shall
have the right to receive copies of all pleadings, notices and communications
with respect to the Third-Party Claim to the extent no attorney-client privilege
is thereby waived; (B) Parent and each Indemnified Party may participate in
settlement negotiations with respect to the Third-Party Claim; and (C) the
Representatives will not consent to the entry of any judgment or enter into any
settlement with respect to the Third-Party Claim unless (1) Parent and each of
the affected Indemnified Parties consent thereto in writing (which consent will
not unreasonably be withheld) or (2) the settlement, compromise or consent
includes an unconditional release from all liability in favor of Parent and each
Indemnified Party. If the Representatives do not elect to assume control of or
otherwise participate in the defense or settlement of any Third-Party Claim, or
if the Representatives so elect but any of the conditions in Section 10.5.2
above is not satisfied or becomes unsatisfied, then: Parent and the affected
Indemnified Parties may control the defense of and consent to the entry of any
judgment or enter into any settlement with respect to the Third-Party Claim,
provided, however, that the Representatives (x) shall have the right to receive
copies of all pleadings, notices and communications with respect to the
Third-Party Claim so long as the receipt of such documents by the
Representatives does not affect any privilege relating to the Indemnified Party,
and (y) may participate in settlement negotiations with respect to the
Third-Party Claim and Parent, and the Indemnified Parties shall not enter into
any settlement of such Third-Party Claim without the prior written consent of
the Representatives (which consent shall not be unreasonably withheld),
provided, that if the Representatives shall have consented to any such
settlement, then the Representatives shall have no power or authority to object
to any claim by any Indemnified Party for indemnity under this Article 10 for
the amount of such settlement; and (3) the Significant Stockholders will remain
responsible (to the extent provided in this Article 10) to indemnify all
Indemnified Parties for all Damages they may incur arising out of, resulting
from or caused by the Third-Party Claim to the fullest extent provided in this
Article 10.

            10.6 Resolution of Conflicts; Arbitration. In case an Indemnifying
Party shall dispute any Claim in writing, the Indemnified Party and the
Indemnifying Party shall meet within ten days of notification of such dispute
and attempt to agree upon the rights of the respective parties with respect to
such Claim. The Representatives shall attend any meeting under this Section 10.6
in place of a Significant Stockholder. If the Indemnified Party and the
Indemnifying Party should so agree, a memorandum setting forth such agreement
shall be prepared and signed by both parties and shall be furnished to the
Escrow Agent. The Escrow Agent shall be entitled to rely on any such memorandum
and distribute part of the Escrow Amount in accordance with the terms thereof.
If the Indemnified Party and the Indemnifying Party fail to meet or if no such
agreement can be reached after such meeting, either the Indemnifying Party or
the Indemnified Party 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



                                       48
<PAGE>   57


arbitrators. The Indemnifying Party and the Indemnified Party shall each select
an arbitrator, and the two arbitrators so selected shall select a third
arbitrator, each of which arbitrators shall be independent and have at least ten
years experience both in arbitration and in the telecommunications industry. 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 (which shall be limited to
reasonable document production) 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 of a court of competent law or equity, should the arbitrators determine
the 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
shall be binding and conclusive upon the parties to this Agreement, and the
Escrow Agent shall be entitled to act in accordance with such decision and make
or withhold payments out of the Escrow Amount in accordance therewith. Such
decision shall be written and shall be supported by written findings of fact and
conclusions of law which shall set forth the award, judgment, decree or order
awarded by the arbitrators. Judgment upon any award rendered by the arbitrators
may be entered in any court having jurisdiction. Any such arbitration shall be
held in Los Angeles, California under the rules then in effect of
J.A.M.S./ENDISPUTE or its successor. For purposes of this Section 10.6, in any
arbitration hereunder in which any Claim is at issue, the Indemnified Party
shall be deemed to be the non-prevailing party in the event that the arbitrators
award the Indemnified Party less than the sum of fifty percent (50%) of the
disputed amount plus any amounts not in dispute; otherwise, the Indemnifying
Party shall be deemed to be the non-prevailing party. The non-prevailing party
to an arbitration shall pay its own expenses, the fees of each arbitrator, the
administrative costs of the arbitration, and the expenses, including without
limitation, reasonable attorneys' fees and costs, incurred by the other party to
the arbitration.

            10.7 Other Indemnification Provisions.

                 10.7.1 Notwithstanding anything to the contrary in this
Agreement, each of the Significant Stockholders hereby agrees that such
Significant Stockholder will not make any claim for indemnification against
Company or Parent by reason of the fact that such Significant Stockholder was a
director, officer, employee or agent of Company or was serving at the request of
Company as a partner, trustee, director, officer, employee, or agent of another
entity (whether such claim is for Damages or otherwise and whether such claim is
pursuant to any statute, charter document, bylaw, agreement, or otherwise) with
respect to any action, suit, proceeding, complaint, claim, or demand brought by
Parent against Company or such Significant Stockholder. The foregoing shall not
limit or affect any other right of the Significant Stockholders to seek
indemnification or advancement of expenses by Company (whether such right is
pursuant to statute or to the Company's charter documents or bylaws) in
connection with any other proceeding brought by Parent other than under this
Article 10 to which a Significant Stockholder becomes a party.

                 10.7.2 The amount of any Damages for which indemnification is
provided under Section 10.2 or Section 10.3 shall be (i) net of any amounts
recovered (net of the cost of recovery of such amounts) by any Indemnified Party
under insurance policies with respect to



                                       49
<PAGE>   58


such Damages and (ii) reduced to take account of any net tax benefit (if any)
actually realized by any Indemnified Party arising from the incurrence or
payment of any such Damages.

                 10.7.3 Payments for Claims that are determined to be payable by
the Significant Stockholders in accordance with this Section 10 will be deducted
from the Escrow Amount in proportion to each Significant Stockholder's
respective percentage interests in the Escrow Amount.

         11. MISCELLANEOUS.

            11.1 Governing Law. The internal laws of the State of California
(irrespective of its choice of law principles) will govern the validity of this
Agreement, the construction of its terms, and the interpretation and enforcement
of the rights and duties of the parties hereto.

            11.2 Assignment; Successors and Assigns. No party hereto may assign
any of its rights or obligations hereunder without the prior written consent of
the other parties hereto. Any purported assignment not permitted by this Section
shall be void. This Agreement will be binding upon and inure to the benefit of
the parties hereto and their respective successors and permitted assigns.

            11.3 Severability. If any provision of this Agreement, or the
application thereof, is for any reason held to any extent to be invalid or
unenforceable, the remainder of this Agreement and 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
unenforceable provision of this Agreement with a valid and enforceable provision
that will achieve, to the extent possible, the economic, business and other
purposes of the void or unenforceable provision.

            11.4 Counterparts. This Agreement may be executed in counterparts,
each of which will be an original as regards any party whose name appears
thereon and all of which together will constitute one and the same instrument.
This Agreement will become binding when one or more counterparts hereof,
individually or taken together, bear the signatures of all parties reflected
hereon as signatories.

            11.5 Other Remedies. Except as otherwise provided herein, any and
all remedies herein expressly conferred upon a party will be deemed cumulative
with and not exclusive of any other remedy conferred hereby or by law on such
party, and the exercise of any one remedy will not preclude the exercise of any
other.

            11.6 Amendment and Waivers. Any term or provision of this Agreement
may be amended only by a writing signed by Parent, the Company and Stockholders
holding at least 50% of the outstanding Company Common Stock. This Agreement may
be amended by the parties hereto at any time before or after approval of the
Company stockholders. The observance of any term of this Agreement may be waived
(either generally or in a particular instance and either retroactively or
prospectively), only by a writing signed by the party to be bound thereby. The
waiver by a party of any breach hereof or default in the performance hereof will
not be deemed to constitute a waiver of any other default or any succeeding
breach or default.




                                       50
<PAGE>   59

            11.7 No Waiver. The failure of any party to enforce any of the
provisions hereof will not be construed to be a waiver of the right of such
party thereafter to enforce such provisions. The waiver by any party of the
right to enforce any of the provisions hereof on any occasion will not be
construed to be a waiver of the right of such party to enforce such provision on
any other occasion.

            11.8 Expenses. Each party will bear its respective expenses and fees
of its own accountants, attorneys, investment bankers and other professionals
incurred with respect to this Agreement and the transactions contemplated
hereby.

            11.9 Attorneys' Fees. Should suit be brought to enforce or interpret
any part of this Agreement, the prevailing party will be entitled to recover, as
an element of the costs of suit and not as damages, reasonable attorneys' fees
to be fixed by the court (including without limitation, costs, expenses and fees
on any appeal). The prevailing party will be entitled to recover its costs of
suit, regardless of whether such suit proceeds to final judgment.

            11.10 Notices. Any notice or other communication required or
permitted to be given under this Agreement will be in writing, will be delivered
personally, by mail or express delivery, postage prepaid, or telecopy (confirmed
in writing) and will be deemed given upon actual delivery or, if mailed by
registered or certified mail, on the third business day following deposit in the
mails, addressed as follows:

                      (i)    If to Parent and/or Newco:

                             Tekelec
                             26580 West Agoura Road
                             Calabasas, CA 91302
                             Attention: General Counsel
                             Fax: 818/ 880-0176

                             with a copy to:

                             Fenwick & West LLP
                             Two Palo Alto Square
                             Palo Alto, California  94306
                             Attention:  Dennis R. DeBroeck
                             Fax:  415-494-1417

                      (ii)   If to the Company and/or the Significant
                             Stockholders:

                             IEX Corporation
                             2425 North Central Expressway
                             Richardson, TX 75080-2736
                             Attention:  President
                             Fax: 972/301-4854




                                       51
<PAGE>   60

                             with a copy to the Representatives, in case of:

                             Bryan Cave LLP
                             120 Broadway, Suite 500
                             Santa Monica, CA  90404
                             Attention:  Thomas Loo, Esq.
                             Fax: 310-576-2200

            or to such other address as the party in question may have furnished
to the other parties by written notice given in accordance with this Section
11.10.

            11.11 Construction of Agreement. The language hereof will not be
construed for or against any party. A reference to an article, Section or
exhibit will mean an Article or Section in, or an exhibit to, this Agreement,
unless otherwise explicitly set forth. The titles and headings in this Agreement
are for reference purposes only and will not in any manner limit the
construction of this Agreement. For the purposes of such construction, this
Agreement will be considered as a whole.

            11.12 No Joint Venture. Nothing contained in this Agreement will be
deemed or construed as creating a joint venture or partnership between the
parties hereto. No party is by virtue of this Agreement authorized as an agent,
employee or legal representative of any other party. No party will have the
power to control the activities and operations of any other, and the parties'
status is, and at all times will continue to be, that of independent contractors
with respect to each other. No party will have any power or authority to bind or
commit any other. No party will hold itself out as having any authority or
relationship in contravention of this Section.

            11.13 Further Assurances. Each party agrees to cooperate fully with
the other party and to execute such further instruments, documents and
agreements and to give such further written assurances as may be reasonably
requested by the other parties to evidence and reflect the transactions provided
for herein and to carry into effect the intent of this Agreement.

            11.14 Absence of Third Party Beneficiary Rights. No provisions of
this Agreement are intended, nor will be interpreted, to provide or create any
third party beneficiary rights or any other rights of any kind in any client,
customer, affiliate, partner or employee of any party hereto or any other person
or entity, unless specifically provided otherwise herein, and, except as so
provided, all provisions hereof will be personal solely between the parties to
this Agreement.

            11.15 Public Announcement. Parent and the Company will issue a press
release approved by both parties announcing the Merger as soon as practicable
following the execution of this Agreement. Parent may issue such press releases,
and make such other disclosures regarding the Merger, as it determines to be
required or appropriate under applicable securities laws or NASD rules after
reasonable consultation, where possible, with the Company. The Company and the
Stockholders will not make any other public announcement or disclosure of the
transactions contemplated by this Agreement. The Company and the Stockholders
will prevent any trading in the securities of Parent by officers, directors,
employees and agents of the Company having knowledge of any material information
regarding Parent provided hereunder until the information in question has been
publicly disclosed.




                                       52
<PAGE>   61

            11.16 Confidentiality. The Company and Parent each confirm that they
have entered into the Mutual Nondisclosure Agreement and that they are each
bound by, and will abide by, the provisions of such Mutual Nondisclosure
Agreement (except that Parent will cease to be bound by the Mutual Nondisclosure
Agreement after the Merger becomes effective). If this Agreement is terminated,
all copies of documents containing confidential information of a disclosing
party will be returned by the receiving party to the disclosing party or be
destroyed, as provided in the Mutual Nondisclosure Agreement.

            11.17 Time is of the Essence. The parties hereto acknowledge and
agree that time is of the essence in connection with the execution, delivery and
performance of this Agreement, and that they will each utilize their best
efforts to satisfy all the conditions to Closing on or before May 31, 1999.

            11.18 Disclosure Letter. The Company Disclosure Letter shall be
arranged in separate parts corresponding to the numbered and lettered sections
contained in Article 2, and the information disclosed in any numbered or
lettered part shall be deemed to relate to and to qualify only the particular
representation or warranty set forth in the corresponding numbered or lettered
Section in Article 2, and shall not be deemed to relate to or to qualify any
other representation or warranty unless it is reasonably apparent from the
information set forth in the Company Disclosure Schedule, that such information
qualifies another representation or warranty of the Company in Article 2.

            11.19 Entire Agreement. This Agreement and the exhibits hereto
constitute the entire understanding and agreement of the parties hereto with
respect to the subject matter hereof and supersede all prior and contemporaneous
agreements or understandings, inducements or conditions, express or implied,
written or oral, between the parties with respect to the subject matter hereof.
The express terms hereof control and supersede any course of performance or
usage of trade inconsistent with any of the terms hereof.

            11.20 Submission to Jurisdiction; Waiver of Jury Trial. Subject to
the provisions of Section 10.6 each of the parties to this Agreement hereby
irrevocably submits to the jurisdiction of any California state or federal court
sitting in the county of Los Angeles in respect of any suit, action or
proceeding arising out of or relating to this Agreement and seeking injunctive
or equitable relief, and irrevocably accepts for itself and in respect of its
property, generally and unconditionally, jurisdiction of the aforesaid courts.
Each of the parties to this Agreement hereby irrevocably waives, to the fullest
extent such party may effectively do so under applicable law, trial by jury and
any objection that such party may now or hereafter have to the laying of venue
of any such suit, action or proceeding brought in any such court and any claim
that such suit, action or proceeding has been brought in an inconvenient forum.





                                       53
<PAGE>   62

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


                                          Tekelec


                                          By: /s/ MICHAEL L. MARGOLIS 
                                             ----------------------------------
                                          Name: Michael L. Margolis
                                          Title: CEO and President


                                          Eagle Lonestar Corporation


                                          By: /s/ MICHAEL L. MARGOLIS 
                                             ----------------------------------
                                          Name: Michael L. Margolis
                                          Title: CEO


                                          IEX Corporation



                                          By: /s/ GARY CROCKET
                                             ----------------------------------
                                          Name: Gary Crocket
                                          Title: CEO

Stockholders:
TEKNEKRON PARTNERS II                     IEX PARTNERS




By: /s/ LESLIE K. WAGNER                  By: /s/ LESLIE K. WAGNER
   --------------------------------          ---------------------------------  
Name: Leslie K. Wagner                    Name: Leslie K. Wagner      
Title: General Partner                    Title: General Partner  
                                        

/s/ GARY CROCKETT
- -----------------------------------
GARY CROCKETT


/s/ STEPHEN LYNN
- -----------------------------------
STEPHEN LYNN
<PAGE>   63



                                  Schedule 1.3
                                        
                            Significant Stockholders



Teknekron Partners II
IEX Partners
Gary Crockett
Stephen Lynn
Debra May
David Laizerovich
Jeffrey Kupp
Jerome Ball
Joe Defenderfer
Brad Simmons
Teknekron Corporation


<PAGE>   64


                                  Schedule 2.30

                                    Knowledge



Harvey Wagner
Gary Crockett
Stephen Lynn
Jeffrey Kupp
Thomas Loo


<PAGE>   65


                                  Schedule 8.10

            Parties Required to Enter into Non-Competition Agreements



Teknekron Partners II
IEX Partners
Gary Crockett
Stephen Lynn
Debra May
David Laizerovich
Jeffrey Kupp
Jerome Ball
Joe Defenderfer
Brad Simmons
Teknekron Corporation
Harvey Wagner


<PAGE>   66

                                  Schedule 8.11

        Company Employees Entering into Employment Agreements with Parent



Gary Crockett
Debra May
David Laizerovich
Jeffrey Kupp
Jerome Ball
Joe Defenderfer
Brad Simmons






<PAGE>   1
                                                                    EXHIBIT 4.01


               NOTE AND SECURITY AGREEMENT DATED AS OF MAY 7, 1999
                                 by and between
  Tekelec, IEX Corporation and the Significant Stockholders of IEX Corporation
<PAGE>   2



                                    TEKELEC,

                                IEX CORPORATION,



                                       AND



                       SIGNIFICANT STOCKHOLDERS OF COMPANY



                           NOTE and Security Agreement




                             Dated as of May 7, 1999




================================================================================



<PAGE>   3

                                TABLE OF CONTENTS


<TABLE>
<S>                                                                                                                     <C>
ARTICLE ONE..............................................................................................................2

           SECTION 1.1.  Definitions.....................................................................................2

ARTICLE TWO..............................................................................................................9

           SECTION 2.1.  Delivery of the Notes at the Closing............................................................9


           SECTION 2.2  Escrow Notes....................................................................................11


           SECTION 2.3  Payments........................................................................................11

ARTICLE THREE...........................................................................................................12

           SECTION 3.1.  Interest Rate; When Payable....................................................................12


           SECTION 3.2.  Default Rate...................................................................................12


           SECTION 3.3.  Waiver of Usury Laws...........................................................................13

ARTICLE FOUR............................................................................................................13

           SECTION 4.1.  Investment Representations.....................................................................13


           SECTION 4.2.  Source of Consideration........................................................................14

ARTICLE FIVE............................................................................................................14

           SECTION 5.1.  Limits on Resales of Notes.....................................................................14


           SECTION 5.2.  Subordination of Notes and Claims..............................................................16

ARTICLE SIX.............................................................................................................17

           SECTION 6.1.  Prohibition on Dividends and Distributions of Company..........................................17


           SECTION 6.2.  Prohibition of Equity Issuances of the Company.................................................17
</TABLE>






<PAGE>   4

<TABLE>
<S>                                                                                                                    <C>
           SECTION 6.3.  Prohibition of Liens on Company Assets.........................................................18


           SECTION 6.4.  Restriction on Certain Transactions; Asset Sales by the Company................................18


           SECTION 6.5.  Limitation on Other Company Indebtedness.......................................................19


           SECTION 6.6  Affiliate Transactions with Company.............................................................20


           SECTION 6.7.  SEC Filings....................................................................................21


           SECTION 6.8  Identification of Senior Indebtedness and Designated Senior Indebtedness........................21


ARTICLE SEVEN...........................................................................................................21

           SECTION 7.1.  Agreement of Subordination.....................................................................21


           SECTION 7.2.  Payments to Significant Stockholders...........................................................22


           SECTION 7.3.  Subrogation of Notes...........................................................................25


           SECTION 7.4.  Authorization to Effect Subordination..........................................................27


           SECTION 7.5.  No Impairment of Subordination.................................................................27


           SECTION 7.6.  Senior Indebtedness of Parent Entitled to Rely.................................................28

ARTICLE EIGHT...........................................................................................................28

           SECTION 8.1.  Failure to Make Payments When Due..............................................................28


           SECTION 8.2  Default in Other Agreements.....................................................................28


           SECTION 8.3.   Other Defaults Under Agreements...............................................................29


           SECTION 8.4.  Involuntary Bankruptcy: Appointment of Receiver, etc...........................................29
</TABLE>




                                       2

<PAGE>   5



<TABLE>
<S>                                                                                                                    <C>
           SECTION 8.5.  Voluntary Bankruptcy; Appointment of Receiver, etc.............................................30


           SECTION 8.6.  Dissolution....................................................................................30


           SECTION 8.7.  Judgments and Attachments......................................................................30

ARTICLE NINE............................................................................................................31

           SECTION 9.1.  Appointment....................................................................................31


           SECTION 9.2.  Powers: General Immunity.......................................................................32


           SECTION 9.3  Right to Indemnity..............................................................................34


           SECTION 9.4.  Payee of Note Treated as Owner.................................................................34


           SECTION 9.5.  Successor Agent................................................................................34

ARTICLE TEN.............................................................................................................35

           SECTION 10.1 Security........................................................................................35


           SECTION 10.2. Rights and Remedies Upon Event of Default......................................................38


           SECTION 10.3. Termination....................................................................................39

ARTICLE ELEVEN..........................................................................................................40

           SECTION 11.1. Ratable Sharing................................................................................40


           SECTION 11.2. Set Off........................................................................................41


           SECTION 11.3. Governing Law..................................................................................41


           SECTION 11.4. Assignment; Successors and Assigns.............................................................41


           SECTION 11.5. Severability...................................................................................41
</TABLE>




                                       3


<PAGE>   6


<TABLE>
<S>                                                                                                                    <C>
           SECTION 11.6. Counterparts...................................................................................42


           SECTION 11.7. Other Remedies.................................................................................42


           SECTION 11.8. Amendment and Waivers..........................................................................42


           SECTION 11.9. Expenses.......................................................................................43


           SECTION 11.10. Attorneys' Fees...............................................................................43


           SECTION 11.11. Notices.......................................................................................43


           SECTION 11.12. Construction of Agreement.....................................................................45


           SECTION 11.13. Further Assurances............................................................................45


           SECTION 11.14. Other Waivers.................................................................................45


           SECTION 11.15. Entire Agreement..............................................................................45

           SECTION 11.16. Submission to Jurisdiction; Waiver of Jury Trial..............................................46
</TABLE>



                                       4

<PAGE>   7


                           NOTE AND SECURITY AGREEMENT


            THIS NOTE AND SECURITY AGREEMENT ("Agreement") is entered into as of
May 7, 1999 among Tekelec, a California corporation ("Parent"), IEX Corporation,
a Nevada corporation and upon the effectiveness of the Merger (as defined below)
a wholly-owned subsidiary of Parent (the "Company"), and the parties listed on
the signature pages hereof (each individually referred to herein as a
"Significant Stockholder" and collectively as "Significant Stockholders").

                                    RECITALS

         A. Parent, Eagle Lonestar Corporation, a Delaware corporation
("Newco"), the Company and certain of the Significant Stockholders have entered
into an Agreement and Plan of Reorganization dated as of April 20, 1999 (the
"Merger Agreement"), pursuant to which Newco, a new corporation organized as a
wholly-owned subsidiary of Parent, will be merged with and into the Company in a
reverse triangular merger (the "Merger"), with the Company to be the surviving
corporation of the Merger, all pursuant to the terms and conditions of the
Merger Agreement, the Articles of Merger and the provisions of applicable law.

         B. Upon the effectiveness of the Merger, all the shares of common stock
of the Company ("Company Common Stock") that are outstanding immediately prior
to the effectiveness of the Merger will be converted into the right to receive
an amount of cash from Parent and, for Significant Stockholders, subordinated
Secured Promissory Notes issued jointly and severally by Parent and the Company
("Obligors") in the form of Exhibit A hereto (each individually referred to
herein as a "Note" and collectively as the "Notes") on the basis determined in
the Merger Agreement, the Articles of Merger and this Agreement.

         C. Obligors' obligations to Significant Stockholders under the Notes
(the "Obligations") will be secured by (a) a pledge of the common stock of the
Company by Parent and (b) the grant by the Company of a security interest in all
assets and properties of the Company, pursuant to the terms and conditions of
this Agreement and the Notes (the "Financing Documents").



<PAGE>   8



         D. The Obligors and Significant Stockholders desire to provide for and
set forth herein the terms and conditions governing such secured financing by
the Significant Stockholders.

                                    AGREEMENT

         NOW THEREFORE, for and in consideration of the mutual covenants and the
representations and warranties set forth herein, it is mutually covenanted and
agreed among the parties hereto as follows:

                                   ARTICLE ONE

                                   Definitions

SECTION 1.1      Definitions.

            "Affiliated Transferee" has the meaning assigned to that term in
Section 5.1 hereof.

            "Aggregate Amounts Due" has the meaning assigned to that term in
Section 11.1 hereof.

            "Agreement" means this Agreement, as amended or supplemented from
time to time in accordance with its terms.

            "Bankruptcy Code" means Title 11 of the United States Code entitled
"Bankruptcy", as now and hereafter in effect, or any successor statute.

            "Business Day" means a day that is not a Saturday, a Sunday or a day
on which banking institutions in Los Angeles, California are not required to be
open.

            "Capital Lease", as applied to any Person, means any lease of any
property (whether real, personal or mixed) by that Person as lessee that, in
conformity with generally accepted accounting principles, is accounted for as a
capital lease on the balance sheet of that Person.




                                       2
<PAGE>   9


            "Capital Stock" means any and all shares, interests, participations,
rights or other equivalents (however designated) of corporate stock, including
securities convertible into such corporate stock.

            "Certificates" has the meaning assigned to that term in Section 2.1
hereof.

            "Closing" has the meaning assigned to that term in Section 2.1
hereof.

            "Closing Date" has the meaning assigned to that term in Section 2.1
hereof.

            "Co-Agent" has the meaning assigned to that term in Section 9.1
hereof and includes any successor Co-Agent appointed pursuant to Section 9.5
hereof.

            "Collateral" has the meaning assigned to that term in Section 10.1
hereof.

            "Designated Senior Indebtedness" means (i) any and all indebtedness
under Parent's Credit Agreement with Imperial Bank (as it may be amended,
restated, extended, restructured or modified), now or hereafter outstanding and
(ii) any other Senior Indebtedness of Parent in which the instrument creating or
evidencing the same or the assumption or guarantee thereof (or related
agreements or documents to which Parent is a party) expressly provides that such
Senior Indebtedness shall be "Designated Senior Indebtedness" for purposes of
this Agreement (provided that such instrument, agreement or other document may
place limitations and conditions on the right of such Senior Indebtedness to
exercise the rights of the Designated Senior Indebtedness).

            "ERISA" means the Employment Retirement Income Security Act of 1974,
as amended from time to time.

            "Escrow Agent" has the meaning assigned to that term in Section 2.1
hereof.

            "Escrow Agreement" has the meaning assigned to that term in Section
2.2 hereof.

            "Escrow Notes" has the meaning assigned to that term in Section 2.1
hereof.

            "Events of Default" has the meaning assigned to that term in Article
8 hereof.




                                       3
<PAGE>   10



            "Extended Maturity Date(s)" has the meaning assigned to that term in
Section 2.1 hereof.

            "First Extended Maturity Date" has the meaning assigned to that term
in Section 3.1 hereof.

            "Indebtedness," as applied to any Person, means (i) indebtedness for
borrowed money, (ii) obligations evidenced by bonds, debentures, notes or
similar instruments, (iii) all obligations under (w) securities repurchase
agreements, (x) interest rate swaps, caps, collars, options and similar
arrangements, (y) any foreign exchange contract, currency swap contract, futures
contract, currency option contract or other foreign currency hedge, and (z)
credit swaps, caps, floors, collars and similar arrangements, (iv) obligations
incurred, assumed or guaranteed in connection with the acquisition by it or a
Subsidiary of any business, property or assets (except Purchase Money Debt
classified as accounts payable under generally accepted accounting principles),
(v) obligations as lessee under Capital Leases and liabilities under any
financing lease or so-called "synthetic" lease transaction entered into, (vi)
reimbursement obligations in respect of letters of credit, bank guarantees or
bankers' acceptances, and (vii) obligations under direct or indirect guarantees
in respect of, and obligations (contingent or otherwise) to purchase or
otherwise acquire, or otherwise to assure a creditor against loss in respect of,
indebtedness or obligations of others of the kinds referred to in clauses (i)
through (vi) above.

            "Indemnity Section" has the meaning assigned to that term in Section
2.2 hereof.

            "Initial Maturity Date" has the meaning assigned to that term in
Section 2.1 hereof.

            "Lien" means any lien, mortgage, pledge, assignment, security
interest, charge or encumbrance of any kind (including any conditional sale or
other title retention agreement, any lease in the nature thereof, and any
agreement to give any security interest), financing statement or similar
document, and any option, trust or other preferential arrangement having the
practical effect of any of the foregoing.




                                       4
<PAGE>   11



            "Material Assets" means assets of the Company having a book value in
excess of fifteen percent (15%) of the total book value of the Company's assets.

            "Maturity Date" has the meaning assigned to that term in Section 2.1
hereof.

            "Net Cash Proceeds" means with respect to any asset sale by any
Person, cash or cash equivalents received (including by way of sale or
discounting of a note, installment receivable or other receivable, but excluding
any other consideration received in the form of assumption by the acquiror of
debt or other obligations relating to such properties or assets) therefrom by
such Person, net of (A) all legal, title and recording tax expenses, commissions
and other fees for services provided by non-affiliated Persons and expenses
incurred and all federal, state, foreign and local taxes required to be accrued
as a liability as a consequence of such asset sale, (B) all payments made by
such Person or its Subsidiaries on any debt which is secured by such assets in
accordance with the terms of any Lien upon or with respect to such assets or
which must by the terms of such Lien, or in order to obtain a necessary consent
to such asset sale or by applicable law, be repaid out of the proceeds from such
asset sale and (C) appropriate amounts to be provided by such Person or any
Subsidiary thereof, as the case may be, as a reserve as required by generally
accepted accounting principles against any liabilities associated with such
assets and retained by such Person or any Subsidiary thereof, as the case may
be, after such asset sale, including, without limitation, liabilities under any
indemnification obligations and severance and other employee termination costs
associated with such asset sale, in each case as determined by the board of
directors, in its reasonable good faith judgment evidenced by a resolution of
the board of directors; provided, however, that any reduction in such reserve
within twelve months following the consummation of such asset sale will be
treated for all purposes in the Financing Documents as a new asset sale at the
time of such reduction with Net Cash Proceeds equal to the amount of such
reduction.

            "Payment Blockage Notice" has the meaning assigned to that term in
Section 7.2 hereof.

            "Permitted Encumbrances" means the following types of Liens:



                                       5
<PAGE>   12


                 (i) Liens for taxes, assessments or governmental charges or
claims the payment of which are not, at the time, delinquent or are being
contested in good faith, if such reserve or other appropriate provision, if any,
as shall be required by generally accepted accounting principles shall have been
made therefor;

                 (ii) statutory Liens of landlords and Liens of carriers,
warehousemen, mechanics and materialmen and other Liens imposed by law incurred
in the ordinary course of business for sums not yet delinquent or that are being
contested in good faith, if such reserve or other appropriate provision, if any,
as shall be required by generally accepted accounting principles shall have been
made therefor;

                 (iii) Liens incurred or deposits made in the ordinary course of
business in connection with workers' compensation, unemployment insurance and
other types of social security, or to secure the performance of tenders,
statutory obligations, surety and appeal bonds, bids, leases, government
contracts, trade contracts, performance and return-of-money bonds and other
similar obligations (exclusive of obligations for the payment of borrowed
money);

                 (iv) Liens securing Purchase Money Debt if the only collateral
for such Purchase Money Debt is the assets acquired therewith;

                 (v) leases or subleases granted to others not interfering in
any material respect with the ordinary conduct of business;

                 (vi) easements, rights-of-way, restrictions, minor defects,
encroachments or irregularities in title and other similar charges or
encumbrances not interfering in any material respect with the ordinary conduct
of business;

                 (vii) any interest or title of a lessor or sublessor under any
lease;

                 (viii) Liens arising from filing Uniform Commercial Code
financing statements relating solely to leases;




                                       6
<PAGE>   13


                 (ix) Liens in favor of customs and revenue authorities arising
as a matter of law to secure payment of customs duties in connection with the
importation of goods; and

                 (x) Liens existing on the date of this Agreement.

            "Person" means any individual, corporation, partnership, joint
venture, association, joint-stock company, trust, unincorporated organization or
government or other agency or political subdivision thereof.

            "Pro Rata Share" means (i) with respect to all payments,
computations and other matters relating to the Note of any Significant
Stockholder, the percentage obtained by dividing (x) the outstanding principal
amount owing under such Note to such Significant Stockholder by (y) the
aggregate principal amount owing under all Notes to all Significant
Stockholders.

            "Purchase Money Debt" of any Person means debt of such Person
secured by a Lien on real or personal property of such Person which debt (a)
constitutes all or a part of the purchase price or construction cost of such
property or (b) is incurred prior to, at the time of or within 180 days after
the acquisition or substantial completion of such property for the purpose of
financing all or any part of the purchase price or construction cost thereof;
provided, however, that (w) the debt so incurred does not exceed 100% of the
purchase price or construction cost of such property and related expenses, (x)
such Lien does not extend to or cover any property other than such item of
property and any improvements on such item and proceeds thereof, (y) the
purchase price or construction cost for such property is or should be included
in "addition to property, plant and equipment" in accordance with generally
accepted accounting principles, and (z) the purchase or construction of such
property is not part of any acquisition of a Person or business unit or line of
business.

            "Requisite Stockholders" means Significant Stockholders (or their
respective successors or assigns) having or holding more than fifty percent
(50%) of the aggregate outstanding principal amount of the Notes.

            "Representatives" has the meaning assigned to that term in Section
9.1 hereof.




                                       7
<PAGE>   14


            "Right of First Refusal" has the meaning assigned to that term in
Section 5.1 hereof.

            "SEC" means the Securities and Exchange Commission.

            "Securities Act" means the Securities Act of 1933, as amended from
time to time.

            "Senior Indebtedness" means, without duplication, the principal and
unpaid interest (including all interest accruing subsequent to the commencement
of any bankruptcy or similar proceeding, whether or not a claim for
post-petition interest is allowable as a claim in any such proceeding), and, to
the extent not included in the foregoing, all amounts payable as fees, costs,
expenses, liquidated damages, indemnities, repurchase and other put obligations
and other amounts to the extent accrued or due or in connection with all present
and future (i) indebtedness of Parent for borrowed money, (ii) obligations of
Parent evidenced by bonds, debentures, notes or similar instruments, (iii) all
obligations of Parent under (w) securities repurchase agreements, (x) interest
rate swaps, caps, collars, options and similar arrangements, (y) any foreign
exchange contract, currency swap contract, futures contract, currency option
contract or other foreign currency hedge, and (z) credit swaps, caps, floors,
collars and similar arrangements, (iv) obligations incurred, assumed or
guaranteed by Parent in connection with the acquisition by it or a Subsidiary of
any business, property or assets (except Purchase Money Debt classified as
accounts payable under generally accepted accounting principles), (v)
obligations of Parent as lessee under Capital Leases and liabilities under any
financing lease or so-called "synthetic" lease transaction entered into by
Parent, (vi) reimbursement obligations of Parent in respect of letters of
credit, bank guarantees or bankers' acceptances, (vii) obligations of Parent
under direct or indirect guarantees in respect of, and obligations (contingent
or otherwise) to purchase or otherwise acquire, or otherwise to assure a
creditor against loss in respect of, indebtedness or obligations of others of
the kinds referred to in clauses (i) through (vi) above; provided that Senior
Indebtedness shall not include: (a) any indebtedness or obligations of the kinds
referred to in clause (i) through (vii) above (collectively, "Debt") as to
which, in the instrument or agreement creating or evidencing the same or
pursuant to which the same is outstanding, it is expressly provided that such
Debt shall be subordinated in right of payment to any other Debt of Parent,
unless such instrument or agreement expressly provides that such Debt shall be
senior in



                                       8
<PAGE>   15


right of payment to the Notes; (b) any Debt of Parent as to which, in the
instrument or agreement creating or evidencing the same or pursuant to which the
same is outstanding, it is expressly provided that such Debt shall not be senior
in right of payment to, or is pari passu in right of payment with, or ranks
junior in right of payment to, the Notes; (c) Debt of Parent in respect of the
Notes; and (d) any Debt of Parent to any Subsidiary or other affiliate of
Parent. Notwithstanding the foregoing, Senior Indebtedness shall not at any time
exceed the difference between (a) $150,000,000 and (b) the outstanding aggregate
principal amount of the Notes.

            "Stockholders" has the meaning assigned to that term in Section 8.7
hereof.

            "Subsidiary" means, with respect to any Person, any corporation,
partnership, association, joint venture or other business entity of which more
than fifty percent (50%) of the total voting power of Capital Stock entitled
(without regard to the occurrence of any contingency) to vote in the election of
the Person or Persons (whether directors, managers, trustees or other Persons
performing similar functions) having the power to direct or cause the direction
of the management and policies thereof is at the time owned or controlled,
directly or indirectly, by that Person or one or more of the other Subsidiaries
of that Person or a combination thereof.

                                   ARTICLE TWO

                                    The Notes

SECTION 2.1      Delivery of the Notes at the Closing.


            Subject to the terms and conditions set forth herein and in the
Merger Agreement and Articles of Merger, Obligors hereby jointly and severally
agree to execute in favor of the Significant Stockholders, and the Significant
Stockholders hereby agree to accept from Obligors, $100,000,000 aggregate
principal amount of the Notes. The Obligations, including without limitation all
principal and accrued but unpaid interest, shall be due and payable in full on
the Maturity Date, but shall be subject to prepayment at any time by Parent or
the Company without penalty. The "Maturity Date" shall be that date which is the
earliest to occur of: (a) the later to occur of the Initial Maturity Date or the
latest Extended Maturity Date; or (b) the date on which



                                       9
<PAGE>   16


the entire unpaid principal amount and all accrued interest on each outstanding
Note is declared or otherwise becomes immediately due and payable in full under
Article 8 hereof. The "Initial Maturity Date" shall be November 7, 1999;
provided, however, the Maturity Date may be extended by Obligors for successive
three (3) month periods ("Extended Maturity Date(s)") if (a) at least
$20,000,000 of the aggregate principal amount of the Notes, plus accrued but
unpaid interest, has been paid (free of claims or liability for disgorgement to
the extent provided under Article 7 hereof) on or prior to the Initial Maturity
Date and an additional $20,000,000 of the aggregate principal amount of the
Notes, plus accrued but unpaid interest, has been paid (free of claims or
liability for disgorgement to the extent provided under Article 7 hereof) on or
prior to each successive Extended Maturity Date and (b) no Event of Default
shall exist hereunder at the Initial Maturity Date and on any Extended Maturity
Date. Any principal payments made pursuant to the preceding sentence (to extend
the Maturity Date) shall be made to satisfy outstanding principal under the
Notes actually held by the Significant Stockholders (i.e., Notes other than the
Escrow Notes), until such Notes are paid in full; any payments thereafter shall
be applied to the Escrow Notes. The Maturity Date shall not be later than
December 31, 2000.

            On the Closing Date, subject to the terms and conditions of this
Agreement, the Merger Agreement and the Articles of Merger, and in reliance on
the representations and warranties herein set forth, Obligors shall deliver to
the Significant Stockholders the Notes, except that an amount equal to 10% of
the gross consideration payable to Significant Stockholders under the Merger
Agreement in aggregate principal amount of the Notes shall be delivered on
behalf of the Significant Stockholders, and in accordance with the Merger
Agreement, to the Escrow Agent as Escrow Notes (as such terms are defined in the
Merger Agreement), all of which Notes (including without limitation the Escrow
Notes) shall be dated the Closing Date and have other appropriate insertions;
and the Significant Stockholders shall deliver to Parent the Certificates (as
defined in the Merger Agreement) as provided in Section 1.5 of the Merger
Agreement. The "Closing Date" and the "Closing" shall be as set forth in Section
6 of the Merger Agreement.




                                       10
<PAGE>   17

SECTION 2.2      Escrow Notes.


            The Escrow Notes delivered to the Escrow Agent at the Closing in
accordance with the Merger Agreement shall be "Notes" for purposes of this
Agreement and be in form and substance identical to the Notes actually received
by the Significant Stockholders, except that the Escrow Notes may contain
additional terms and conditions consistent with the provisions of Articles 1 and
10 of the Merger Agreement, and the Escrow Agreement (as defined in the Merger
Agreement). The Escrow Notes shall be governed by this Agreement, except as set
forth in Article 10 of the Merger Agreement (the "Indemnity Section") and the
Escrow Agreement, the terms of which Indemnity Section and Escrow Agreement
shall control over and supersede any contrary provisions of this Agreement or
any other Financing Document.

SECTION 2.3      Payments.


            Except as otherwise provided in this Agreement, the Indemnity
Section and the Escrow Agreement, payments on the Notes shall be made by Parent
and/or the Company to Significant Stockholders by lump sum wire transfer to an
account maintained and designated by Co-Agents, who shall be solely responsible
for disbursing requisite funds therefrom to each Significant Stockholder or
other Note holder. Each such transfer by Obligors to Co-Agents shall constitute
payment to each Significant Stockholder of its Pro Rata Share thereof on the
date of such transfer for all purposes hereunder, including, without limitation,
Articles 2, 3 and 8, and no Event of Default shall result from any delay of
Co-Agents in disbursing funds to Significant Stockholders. Each Significant
Stockholder shall provide Parent and the Company with its address and telephone
and facsimile numbers and shall promptly advise Obligors of any change of such
address or numbers. Upon any sale or other transfer or disposition of a Note
under Section 5.1 hereof, Parent and the Company shall immediately be provided
with the name and address and telephone and facsimile numbers of the purchaser
or transferee of such Note. Co-Agents shall at all times maintain a register of
the names, addresses and facsimile numbers of holders of the Notes and provide
such list to Obligors upon request, and at least five Business Days prior to
each scheduled payment of principal or interest hereunder.




                                       11
<PAGE>   18


                                  ARTICLE THREE

                                    Interest

SECTION 3.1      Interest Rate; When Payable.


            Each Note will provide that interest on unpaid principal will accrue
at a rate equal to seven percent (7%) per annum (calculated on the basis of a
365-day year), compounded quarterly, through the Initial Maturity Date.
Immediately following the Initial Maturity Date, such rate shall increase to
twelve percent (12%) per annum (calculated on the basis of a 365-day year),
compounded quarterly, which rate shall increase by two percent (2%) per annum
immediately following each Extended Maturity Date after the first Extended
Maturity Date (the "First Extended Maturity Date"). Interest shall be payable in
arrears (i) on a calendar quarterly basis until the Initial Maturity Date, (ii)
on the Initial Maturity Date (if the Maturity Date is extended under Section
2.1), (iii) on each Extended Maturity Date prior to the Maturity Date and (iv)
to the extent unpaid at maturity, on the Maturity Date.

SECTION 3.2      Default Rate.


            Each Note will further provide that upon the occurrence and during
the continuation of any Event of Default (as defined in Article 8 below), the
outstanding principal amount of all Notes shall thereafter bear interest
(including post-petition interest in any proceeding under the Bankruptcy Code or
other applicable bankruptcy laws) payable upon demand at a rate of twelve
percent (12%) per annum (computed on the basis of a 365-day year), compounded
quarterly, through the First Extended Maturity Date, and thereafter equal to the
then applicable interest rate. Payment or acceptance of the increased rates of
interest provided for in this Section 3.2 is not a permitted alternative to
timely payment and shall not constitute a waiver of any Event of Default or
otherwise prejudice or limit any rights or remedies of any Significant
Stockholder.

SECTION 3.3      Waiver of Usury Laws.


            Notwithstanding any provision of any Financing Document, Obligors
(individually and collectively) are not and will not be required to pay interest
at a rate or any fee



                                       12
<PAGE>   19


or charge in an amount prohibited by applicable law. If interest or any fee or
charge payable on any date would be in a prohibited amount, then such interest,
fee or charge will be automatically reduced to the maximum amount that is not
prohibited, and any interest, fee or charge for subsequent periods (to the
extent not prohibited by applicable law) will be increased accordingly until
Co-Agents and each Significant Stockholder receives payment of the full amount
of each such reduction. To the extent that any prohibited amount is actually
received by Co-Agents or any Significant Stockholder, then such amount will be
automatically deemed to constitute a repayment of principal indebtedness
hereunder.

            Obligors covenant (to the extent that they may lawfully do so) that
they will not at any time insist upon, or plead, or in any manner whatsoever
claim or take the benefit or advantage of, any usury law whenever enacted, now
or at any time hereafter in force, which may affect the covenants or the
performance of the Financing Documents; and Obligors (to the extent that they
may lawfully do so) hereby expressly waive all benefit or advantage of any such
usury law and covenants that they will not hinder, delay or impede the execution
of any power herein granted to Co-Agents based on such law, but will permit the
execution of every such power as though no such usury law had been enacted.

                                  ARTICLE FOUR

           Representations and Warranties of Significant Stockholders

SECTION 4.1      Investment Representations.


            Each Significant Stockholder hereby represents and warrants to
Obligors that it is purchasing the Notes solely for its own account and not as
nominee or agent for any other person and not with a view to, or for offer or
sale in connection with, any distribution thereof (within the meaning of the
Securities Act) that would be in violation of the securities laws of the United
States of America or any state thereof; and that it is an "accredited investor"
as that term is defined in Rule 501 of Regulation D of the Securities Act. Each
Significant Stockholder agrees to complete and provide to Parent and Company an
Investor Questionnaire in such form as reasonably requested by Parent.




                                       13
<PAGE>   20


SECTION 4.2      Source of Consideration.


            Each Significant Stockholder represents and warrants that no part of
the consideration to be exchanged for or used to purchase the Notes to be
purchased by it constitutes assets allocated to any qualified trust which
contains the assets of any employee pension benefit plan with respect to which
Obligors or any corporation considered an affiliate of Obligors within the
meaning of Section 407(d)(7) of ERISA is a party in interest or disqualified
person. As used in this Section 4.2, the terms "employee pension benefit plan"
and "party in interest" shall have the meanings assigned to such terms in
Section 3 of ERISA, the term "disqualified person" shall have the meaning
assigned to such term in Section 4975 of the Internal Revenue Code of 1986, the
term "qualified trust" shall mean any trust exempt under Section 501(a) of the
Internal Revenue Code of 1986 that holds the assets of any employee pension
benefit plan that is qualified under Section 401(a) of the Internal Revenue Code
of 1986, and the term "affiliate" shall have the meaning assigned to it in
Section 407(d)(7) of ERISA.

                                  ARTICLE FIVE

               Post-Closing Covenants of Significant Stockholders

SECTION 5.1.     Limits on Resales of Notes.


            No Significant Stockholder shall sell or otherwise transfer or
dispose of any Note or Notes on or before the Initial Maturity Date or the
occurrence of an Event of Default hereunder. If a Significant Stockholder
desires to sell or otherwise transfer or dispose of any Note or Notes following
the Initial Maturity Date or the occurrence of an Event of Default hereunder
other than pursuant to a registration statement under the Securities Act, such
Significant Stockholder shall deliver to Obligors an opinion of counsel in form
and substance (and from counsel) reasonably satisfactory to Obligors, that
exemptions from the Securities Act and any other applicable federal or state
securities laws are available; provided, however, that Obligors shall be given
not less than ten (10) Business Days' prior written notice of any intended sale,
transfer or disposition of a Note by a Significant Stockholder and a right of
first refusal for such period to purchase such Note by paying the full principal
amount and accrued but unpaid interest outstanding thereunder ("Right of First
Refusal"), which Right of First Refusal shall



                                       14
<PAGE>   21


terminate with respect to such Note (and only that Note) upon the initial sale,
transfer or other disposition of such Note in accordance with this Section 5.1
to a Person other than a Significant Stockholder or Affiliated Transferee.
Notwithstanding the foregoing provisions of this Section 5.1, a Significant
Stockholder that is an individual may transfer a Note at any time to a family
trust or limited partnership in which all of the general and limited partnership
interests are held by such Significant Stockholder and members of such
Significant Stockholder's immediate family (an "Affiliated Transferee") solely
for estate planning purposes, subject only to the provision by such Significant
Stockholder of an opinion of counsel in conformity with the preceding sentence.
If any Note is sold or otherwise transferred or disposed of by a Significant
Stockholder in accordance with this Section 5.1, then any purchaser, assignee or
transferee of such Note (or subsequent purchaser, assignee or transferee) shall
be deemed a "Significant Stockholder" under this Agreement and have the rights,
duties and obligations arising hereunder. Upon issuance of the Notes, and until
such time as the same is no longer required under applicable securities laws,
the Notes (and all Notes issued in exchange therefor or substitution thereof)
shall bear the following legend:

            "THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED,
            HYPOTHECATED OR OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE,
            ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH
            THE PROVISIONS OF A NOTE AND SECURITY AGREEMENT DATED AS OF MAY 7,
            1999 (A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF TEKELEC.
            EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO TRANSFER, SALE,
            ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS NOTE
            MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION
            STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'),
            OR (B) IF TEKELEC HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF
            COUNSEL FOR THE HOLDER THAT SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
            HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT FROM THE PROVISIONS OF
            SECTION 5 OF THE ACT AND THE RULES AND



                                       15
<PAGE>   22


            REGULATIONS IN EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES
            LAWS."

            The first sentence of the foregoing legend shall be deleted from and
shall not be applicable to a Note following the initial sale, transfer or other
disposition of such Note in accordance with this Section 5.1 by a Significant
Stockholder to a Person other than a Significant Stockholder or Affiliated
Transferee.

            Notwithstanding the foregoing, the Escrow Notes shall not be sold or
otherwise be subject to transfer or disposition so long as they are held by the
Escrow Agent. Upon any release or return of any Escrow Notes to Significant
Stockholders in accordance with the Indemnity Section or Escrow Agreement, such
Notes shall be subject to the foregoing provisions of this Section 5.1.

SECTION 5.2      Subordination of Notes and Claims.


            The Obligations under the Notes shall be subordinate to Senior
Indebtedness of Parent as provided in Article 7 hereof. Each Significant
Stockholder further covenants and agrees that any claims it may have against
Parent arising out of this Agreement shall be subordinated to the Senior
Indebtedness to the same extent and on the same terms as the Notes are
subordinate to Senior Indebtedness.

                                   ARTICLE SIX

            Post-Closing Covenants of Parent and the Company

            Until payment in full of all of the Obligations, unless a Co-Agent
or Requisite Stockholders shall otherwise give prior written consent, Parent and
the Company, as applicable, shall perform all covenants in this Article 6.

SECTION 6.1      Prohibition on Dividends and Distributions of Company


            The Company shall not declare, order, pay, make or set apart (i) any
dividend or other distribution on account of any shares of any class of stock of
the Company now or hereafter outstanding, except a dividend payable solely in
shares of Capital Stock to the holders of that



                                       16
<PAGE>   23
class (which dividend of shares shall be subject to the pledge by Parent under
Article 10 hereof), or (ii) any redemption, retirement, sinking fund or similar
payment, purchase or other acquisition for value of any shares of any class of
stock of the Company now or hereafter outstanding held by Parent.

SECTION 6.2      Prohibition of Equity Issuances of the Company

            The Company shall not issue or sell any Capital Stock, except:

            (i) to Parent (which Capital Stock shall be subject to the pledge by
Parent under Article 10 hereof); and

            (ii) as required to satisfy any pre-Merger obligations of the
Company to issue or sell Capital Stock.

SECTION 6.3      Prohibition of Liens on Company Assets

            The Company shall not create, incur, assume or permit to exist any
Lien on or with respect to any property or asset of any kind (including any
document or instrument in respect of goods or accounts receivable) of the
Company, whether now owned or hereafter acquired, or any income or profits
therefrom, or file or permit the filing of any financing statement or other
similar notice of any Lien with respect to any such property, asset, income or
profits under the Uniform Commercial Code of any state or under any similar
recording or notice statute, except:

                 (i) Permitted Encumbrances; and

                 (ii) Other Liens junior to Liens of the Significant
Stockholders so long as the indebtedness secured thereby does not exceed
$1,000,000 in aggregate principal amount.

SECTION 6.4      Restriction on Certain Transactions; Asset Sales by the Company

            Neither the Company nor any wholly-owned Subsidiary of the Company
shall enter into any transaction of merger or consolidation, or liquidate,
wind-up or dissolve itself (or suffer any liquidation or dissolution), create
any Subsidiary, or convey, sell, lease, sublease,



                                       17
<PAGE>   24


license, transfer or otherwise dispose of, in one transaction or a series of
transactions, any intellectual property or Material Assets, whether now owned or
hereafter acquired, except:

                 (i) any Subsidiary of the Company may be created (as provided
in subsection (iv) below), and merged or consolidated with or into the Company
or any wholly-owned Subsidiary of the Company, or be liquidated, wound up or
dissolved, or all or any substantial part of its business, property or assets
may be conveyed, sold, leased, transferred or otherwise disposed of, in one
transaction or a series of transactions, to the Company or any wholly-owned
Subsidiary of the Company; provided that, in the case of such a merger or
consolidation, the Company or such wholly-owned Subsidiary shall be the
continuing or surviving corporation;

                 (ii) the Company and its Subsidiaries may sell or otherwise
transfer or dispose of (a) inventory in the ordinary course of business, (b)
obsolete assets and (c) intellectual property in the ordinary course of business
or for value acceptable to a Co-Agent or Requisite Stockholders, and may enter
into licenses of intellectual property in the ordinary course of business or for
value acceptable to a Co-Agent or Requisite Stockholders; and 

                 (iii) the Company and its Subsidiaries may sell or otherwise
transfer or dispose of Material Assets in arms' length transactions with
non-affiliated third parties for fair value, provided that the Net Cash Proceeds
of any sales of Material Assets shall be applied as payment on the Notes; and

                 (iv) the Company and its Subsidiaries may create Subsidiaries
and transfer assets thereto, subject in each case to (a) the consent of a
Co-Agent or Requisite Stockholders or (b) each such Subsidiary becoming an
obligor under the Notes and being bound by the covenants applicable to the
Company hereunder, and granting a security interest and lien in all of its
assets and having its Capital Stock (to the extent held by the Company or its
Subsidiary) pledged to Co-Agents under the terms and conditions set forth in
Article 10 hereof.




                                       18
<PAGE>   25



SECTION 6.5      Limitation on Other Company Indebtedness


            The Company shall not create, incur, assume or guarantee, or
otherwise become or remain liable with respect to, any Indebtedness, except:

                 (i) the Company may become and remain liable with respect to
the Notes;

                 (ii) the Company may become and remain liable with respect to
guarantees of Indebtedness of Parent that are subordinated to the Notes;

                 (iii) the Company may become and remain liable with respect to
Purchase Money Debt;

                 (iv) the Company may become and remain liable with respect to
Indebtedness described in parts (iv) and (v) of the definition thereof;

                 (v) the Company may become and remain liable with respect to
Indebtedness to any of its wholly-owned Subsidiaries, and any wholly-owned
Subsidiary of the Company may become and remain liable with respect to
Indebtedness to the Company or any other wholly-owned Subsidiary of the Company;
provided that (a) all such intercompany Indebtedness shall be evidenced by
promissory notes in which Co-Agents shall have a perfected security interest
under Article 10 hereof, (b) all such intercompany Indebtedness owed by the
Company to any of its Subsidiaries shall be unsecured and subordinated in right
of payment to the payment in full of the Obligations pursuant to the terms of
the applicable promissory notes or an intercompany subordination agreement, and
(c) any payment by any Subsidiary of the Company under any guarantee of the
Obligations shall result in a pro tanto reduction of the amount of any
intercompany Indebtedness owed by such Subsidiary to the Company or to any of
its Subsidiaries for whose benefit such payment is made; 

                 (vi) the Company may become and remain liable with respect to
unsecured trade debt incurred in the ordinary course of business of the Company;
and 




                                       19
<PAGE>   26



                 (vii) the Company may remain liable with respect to
Indebtedness existing on the date of this Agreement.

SECTION 6.6      Affiliate Transactions with Company.

            The Company shall not engage in transactions with affiliates
involving the lease, license, transfer, purchase or sale of assets, except: 

                     (i) transactions of a type that have historically been in
the ordinary course of business for Parent and its affiliates; 

                     (ii) transactions in which fair value is received by the
Company; 

                     (iii) transactions otherwise permitted by a Section of this
Article 6; or 

                     (iv) transactions consented to by a Co-Agent or Requisite
Stockholders.

SECTION 6.7.     SEC Filings.

            Parent shall provide to Co-Agents copies of its filings with the SEC
under the Securities Exchange Act of 1934, in each case within fifteen (15) days
of the date of filing.

SECTION 6.8      Identification of Senior Indebtedness and Designated Senior 
                 Indebtedness.

                 From time to time, upon reasonable request by a Co-Agent,
Parent will provide a list of the then-outstanding Senior Indebtedness and
Designated Senior Indebtedness to Co-Agents; provided, however, that such a
request may be made only once prior to the Initial Maturity Date and no more
frequently than once each quarter thereafter (excluding any reasonable requests
made during the continuation of an Event of Default).




                                       20
<PAGE>   27

                                  ARTICLE SEVEN

                             Subordination of Notes

SECTION 7.1.     Agreement of Subordination.

            Parent and the Company covenant and agree, and each Significant
Stockholder or other holder of a Note likewise covenants and agrees, that all
Notes shall be issued subject to the provisions of this Article 7; and each
Person holding any Note, whether upon original issue or upon transfer,
assignment or exchange thereof, accepts and agrees to be bound by such
provisions. The payment of the principal of and interest on all Notes by Parent
(but not by the Company) shall, to the extent and in the manner hereinafter set
forth, be subordinated and subject in right of payment to the prior payment in
full in cash of all Senior Indebtedness of Parent, whether outstanding as of the
date of this Agreement or thereafter incurred; provided, however, and
notwithstanding any contrary provision of this Agreement, that unless a Co-Agent
or any Significant Stockholder has actual notice or knowledge of the occurrence
of an event or any reason why a payment to a Co-Agent or Significant
Stockholders is not permitted by this Article 7 at the time of receiving such
payment, such payment shall not be subject to any claim or liability for
disgorgement by Co-Agents or Significant Stockholders to or for the benefit of a
holder of Senior Indebtedness under this Article 7.

SECTION 7.2.     Payments to Significant Stockholders.

            No payment shall be made with respect to the principal of, or any
interest on the Notes by Parent, if:

                 (i) a default in the payment of principal, interest or other
obligations due on any Senior Indebtedness of Parent has occurred and is
continuing (or, in the case of Senior Indebtedness of Parent for which there is
a period of grace, in the event of such a default that continues beyond the
period of grace, if any, specified in the instrument or lease evidencing such
Senior Indebtedness of Parent), unless and until such default shall have been
cured or waived, shall have ceased to exist or shall become subject to a
forbearance agreement expressly permitting payment on the Notes; or




                                       21
<PAGE>   28

                 (ii) a default (other than a payment default) on Designated
Senior Indebtedness occurs and is continuing that then permits holders of such
Designated Senior Indebtedness to accelerate its maturity and a Co-Agent
receives a notice of the default (a "Payment Blockage Notice") from a
representative of Designated Senior Indebtedness or a holder of Designated
Senior Indebtedness or Parent.

            If a Co-Agent receives any Payment Blockage Notice pursuant to
clause (ii) above, no subsequent Payment Blockage Notice shall be effective for
purposes of this Section unless and until at least 365 days shall have elapsed
since the initial effectiveness of the immediately prior Payment Blockage
Notice. No nonpayment default that existed or was continuing on the date of
delivery of any Payment Blockage Notice to a Co-Agent (unless such default was
waived, cured or otherwise ceased to exist or was subject to a forbearance
agreement expressly permitting payment on the Notes and thereafter subsequently
reoccurred) shall be, or be made, the basis for a subsequent Payment Blockage
Notice.

            Parent may and shall resume payments on and distributions in respect
of the Notes upon the earlier of:

                 (a) in the case of a payment default, the date upon which the
default was cured or waived, ceases to exist or becomes subject to a forbearance
agreement expressly permitting payment on the Notes, or

                 (b) in the case of a default referred to in clause (ii) above,
the earlier of the date on which such default is cured or waived, ceases to
exist or becomes subject to a forbearance agreement expressly permitting payment
on the Notes or 180 days after the date on which the applicable Payment Blockage
Notice is received if the maturity of the applicable Designated Senior
Indebtedness has not been accelerated, unless this Article 7 otherwise prohibits
the payment or distribution at the time of such payment or distribution as a
result of a payment default with respect to the applicable Senior Indebtedness
as a consequence of the acceleration of the maturity thereof or otherwise.

            Upon any payment by Parent, or distribution of assets of Parent of
any kind or character, whether in cash, property or securities, to creditors
upon any dissolution or winding-up



                                       22
<PAGE>   29


or liquidation or reorganization of Parent, whether voluntary or involuntary or
in bankruptcy, moratorium of payments, insolvency, receivership or other
proceedings, all amounts due or to become due upon all Senior Indebtedness of
Parent shall first be paid in full in cash or other payment satisfactory to the
holders of such Senior Indebtedness of Parent, or payment thereof in accordance
with its terms provided for in cash or other payment satisfactory to the holders
of such Senior Indebtedness of Parent before any payment is made on account of
the principal of or interest on the Notes by Parent (other than from the Pledged
Collateral or proceeds of foreclosure thereon); and upon any dissolution or
winding-up or liquidation or reorganization of Parent or bankruptcy, insolvency,
receivership or other proceeding, any payment by Parent, or distribution of
assets of Parent of any kind or character, whether in cash, property or
securities (other than the Pledged Collateral or the proceeds of foreclosure
thereon), to which the Significant Stockholders or Co-Agents would be entitled,
except for the provisions of this Article 7, shall (except as aforesaid), be
paid by Parent or by any receiver, trustee in bankruptcy, moratorium of
payments, liquidating trustee, agent or other Person making such payment or
distribution, or by the Significant Stockholders or by the Co-Agents under this
Agreement if received by them or it, directly to the holders of Senior
Indebtedness of Parent (pro rata to such holders on the basis of the respective
amounts of Senior Indebtedness of Parent held by such holders, or as otherwise
required by law or a court order) or their representatives, or to the trustee or
trustees under any indenture pursuant to which any instruments evidencing any
Senior Indebtedness of Parent may have been issued, as their respective
interests may appear, to the extent necessary to pay all Senior Indebtedness of
Parent in full, in cash or other payment satisfactory to the holders of such
Senior Indebtedness of Parent, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness of Parent, before any
payment or distribution is made by Parent, its successors or representatives to
the Significant Stockholders or to the Co-Agents.

            For purposes of this Article 7, the words, "cash, property or
securities" shall not be deemed to include shares of stock of Parent as
reorganized or readjusted, or securities of Parent or any other corporation
provided for by a plan of reorganization or readjustment, the payment of which
is subordinated at least to the extent provided in this Article 7 with respect
to the Notes to the payment of all Senior Indebtedness of Parent which may at
the time be outstanding; provided that (y) the Senior Indebtedness of Parent is
assumed by the new



                                       23
<PAGE>   30


corporation, if any, resulting from any reorganization or readjustment, and (z)
the rights of the holders of Senior Indebtedness of Parent (other than leases
which are not assumed by Parent or the new corporation, as the case may be) are
not, without the consent of such holders, altered by such reorganization or
readjustment.

            In the event of the acceleration of the Notes because of an Event of
Default, no payment or distribution shall be made to the Co-Agents or any
Significant Stockholders in respect of the principal of or interest on the Notes
by Parent, until (i) all Senior Indebtedness of Parent has been paid in full in
cash or other payment satisfactory to the holders of Senior Indebtedness of
Parent, (ii) such acceleration is rescinded in accordance with the terms of this
Agreement or (iii) the 181st day following the date of such acceleration if no
Senior Indebtedness of Parent has been accelerated prior thereto. If payment of
the Notes is accelerated because of an Event of Default, Parent shall promptly
notify holders of Senior Indebtedness of Parent of the acceleration.

            In the event that, notwithstanding the foregoing provisions, any
payment or distribution of assets of Parent of any kind or character, whether in
cash, property or securities (including, without limitation, by way of setoff or
otherwise, but excluding the Pledged Collateral and any proceeds of foreclosure
thereon), prohibited by the foregoing, shall be received by the Co-Agents or the
Significant Stockholders before all Senior Indebtedness of Parent is paid in
full in cash or other payment satisfactory to the holders of such Senior
Indebtedness of Parent, or provisions made for such payment thereof in
accordance with its terms in cash or other payment satisfactory to the holders
of such Senior Indebtedness of Parent, such payment or distribution shall be
held in trust for the benefit of and shall be paid over or delivered to the
holders of Senior Indebtedness of Parent or their representatives, or to the
trustee or trustees under any indenture pursuant to which any instruments
evidencing any Senior Indebtedness of Parent may have been issued, as their
respective interests may appear, as calculated by Parent, for application to the
payment of all Senior Indebtedness of Parent remaining unpaid to the extent
necessary to pay all Senior Indebtedness of Parent in full in cash or other
payment satisfactory to the holders of such Senior Indebtedness of Parent after
giving effect to any concurrent payment or distribution, or provision therefor
to or for the holders of such Senior Indebtedness of Parent.




                                       24
<PAGE>   31


SECTION 7.3.     Subrogation of Notes.

            Subject to the payment in full in cash of all Senior Indebtedness of
Parent, the Significant Stockholders shall be subrogated to the extent of the
payments or distributions made to the holders of such Senior Indebtedness of
Parent pursuant to the provisions of this Article 7 to the rights of the holders
of Senior Indebtedness of Parent to receive payments or distributions of cash,
property or securities of Parent applicable to the Senior Indebtedness of Parent
until the principal and interest on the Notes shall be paid in full; and, for
the purposes of such subrogation, no payments or distributions to the holders of
the Senior Indebtedness of Parent of any cash, property or securities to which
the Significant Stockholders or the Co-Agents would be entitled except for the
provision of this Article 7, and no payment over pursuant to the provisions of
this Article 7, to or for the benefit of the holders of Senior Indebtedness of
Parent by the Significant Stockholders or the Co-Agents, shall, as between
Parent, its creditors other than holders of Senior Indebtedness of Parent, and
the Significant Stockholders, be deemed to be a payment by Parent to or on
account of the Senior Indebtedness of Parent. It is understood that the
provisions of this Article 7 are and are intended solely for the purposes of
defining the relative rights of the Significant Stockholders, on the one hand,
and the holders of the Senior Indebtedness of the Parent on the other hand.

            Nothing contained in this Article 7 or elsewhere in this Agreement
or in the Notes is intended to or shall impair, as among Parent, its creditors
other than the holders of Senior Indebtedness of Parent, and the Significant
Stockholders, the obligation of Parent (and the Company), which is absolute and
unconditional to pay to the Significant Stockholders the principal of and
interest on the Notes as and when the same shall become due and payable in
accordance with their terms, or is intended to or shall affect the relative
rights of the Significant Stockholders and creditors of Parent other than the
holders of the Senior Indebtedness of Parent, nor shall anything herein or
therein prevent the Co-Agents or any Significant Stockholder from exercising all
rights otherwise permitted by applicable law upon default under this Agreement
or the Notes, subject to the rights, if any, under this Article 7 of the holders
of Senior Indebtedness of Parent in respect of cash, property or securities of
Parent (other than the Pledged Collateral and the proceeds of any foreclosure
thereon) received upon the exercise of any such remedy.




                                       25
<PAGE>   32

            Upon any payment or distribution of assets of Parent referred to in
this Article 7, the Significant Stockholders and the Co-Agents shall be entitled
to rely upon any order or decree made by any court of competent jurisdiction in
which such bankruptcy, dissolution, winding-up, liquidation or reorganization
proceedings are pending, or certificate of the receiver, trustee in bankruptcy,
liquidating trustee, agent or other Person making such payment or distribution,
delivered to a Co-Agent or to the Significant Stockholders, for the purpose of
ascertaining the Persons entitled to participate in such distribution, the
holders of the Senior Indebtedness of Parent and other Indebtedness of Parent,
with the amount thereof or payable thereon and all of the facts pertinent
thereto or to this Article 7.

SECTION 7.4.     Authorization to Effect Subordination.

            Each Significant Stockholder by its acceptance of a Note authorizes
and directs each Co-Agent on such Significant Stockholder's behalf to take such
action as may be necessary or appropriate to effectuate the subordination as
provided in this Article 7 and appoints each Co-Agent to act as the Significant
Stockholder's attorney-in-fact for any and all such purposes. If the Co-Agent or
Significant Stockholders do not file a proper proof of claim or proof of debt in
the form required in any bankruptcy or insolvency proceeding at least fifteen
(15) days before the expiration of the time to file such claim, holders of any
Senior Indebtedness of Parent or their representatives are hereby authorized to
file an appropriate claim for and on behalf of any Significant Stockholders.

SECTION 7.5.     No Impairment of Subordination.

            No right of any present or future holder of any Senior Indebtedness
of Parent to enforce subordination as herein provided shall at any time in any
way be prejudiced or impaired by any act or failure to act on the part of Parent
or by any act or failure to act, in good faith, by any such holder, or by any
noncompliance by Parent with the terms, provisions and covenants of this
Agreement, regardless of any knowledge thereof which any holder may have or
otherwise be charged with.




                                       26
<PAGE>   33

SECTION 7.6.     Senior Indebtedness of Parent Entitled to Rely.

            The holders of Senior Indebtedness of Parent (including, without
limitation, Designated Senior Indebtedness) shall have the right to rely upon
this Article 7, and no amendment or modification of the provisions contained
herein shall diminish the rights of such holders unless such holders at the time
of such amendment or modification shall have agreed in writing thereto.

                                  ARTICLE EIGHT

                                Events of Default

            Each Note shall provide that if any of the following conditions or
events ("Events of Default") shall occur:

SECTION 8.1.     Failure to Make Payments When Due.

            Failure to pay any installment of principal of any Note when due,
whether at stated maturity, by acceleration, by notice of prepayment or
otherwise; or failure to pay any interest on any Note within ten (10) Business
Days after the date due; or

SECTION 8.2      Default in Other Agreements.

                 (i) Failure (a) of Parent to pay when due $1,000,000 or more of
principal of or interest on any specific Indebtedness (other than Indebtedness
referred to in Section 8.1) or (b) of Parent to pay when due any principal of or
interest on any Indebtedness having an outstanding principal amount of
$5,000,000 or more, in each case beyond the end of any grace period provided
therefor; or (ii) breach or default by Parent with respect to any other material
term of any evidence of any Indebtedness described in the foregoing clause (i)
if the effect of such breach or default is to cause an amount of $1,000,000 or
more to become or be declared due and payable prior to its stated maturity or
the stated maturity of any underlying obligation, as the case may be (upon the
giving or receiving of notice, lapse of time, both, or otherwise); provided,
however, there shall not be an Event of Default under this Section 8.2 if any
default or claimed default is cured either by payment of the amount of
Indebtedness that is then due or payable or by curing



                                       27
<PAGE>   34


the cause of the default within forty-five (45) days from the date an executive
officer of Parent actually becomes aware thereof (or ninety (90) days from the
date an executive officer of Parent actually becomes aware thereof if Parent is
attempting to remedy such default or disputes such default in good faith); or

SECTION 8.3.     Other Defaults Under Agreements.

            Parent or the Company shall default in the performance of or
compliance with any term contained in this Agreement, other than any such term
referred to in Section 8.1, and such default shall not have been remedied or
waived within thirty (30) days after an executive officer of Parent or the
Company (other than a Significant Stockholder), as applicable, actually becomes
aware of such default (or sixty (60) days thereafter if Parent or the Company is
attempting to remedy such default or disputes such default in good faith); or

SECTION 8.4.     Involuntary Bankruptcy: Appointment of Receiver, etc.

                 (i) A court having jurisdiction in the premises shall enter a
decree or order for relief in respect of Parent or the Company in an involuntary
case under the Bankruptcy Code or under any other applicable bankruptcy,
insolvency or similar law now or hereafter in effect, which decree or order is
not stayed; or any other similar relief shall be granted under any applicable
federal or state law; or (ii) an involuntary case shall be commenced against
Parent or the Company under the Bankruptcy Code or under any other applicable
bankruptcy, insolvency or similar law now or hereafter in effect; or a decree or
order of a court having jurisdiction in the premises for the appointment of a
receiver, liquidator, sequestrator, trustee, custodian or other officer having
similar powers over Parent or the Company, or over all or a substantial part of
its property, shall have been entered; or there shall have occurred the
involuntary appointment of an interim receiver, trustee or other custodian of
Parent or the Company for all or a substantial part of its property; or

SECTION 8.5.     Voluntary Bankruptcy; Appointment of Receiver, etc.

                 (i) Parent or the Company shall have an order for relief
entered with respect to it or commence a voluntary case under the Bankruptcy
Code or under any other applicable



                                       28
<PAGE>   35


bankruptcy, insolvency or similar law now or hereafter in effect, or shall
consent to the entry of an order for relief in an involuntary case, or to the
conversion of an involuntary case to a voluntary case, under any such law, or
shall consent to the appointment of or taking possession by a receiver, trustee
or other custodian for all or a substantial part of its property; or Parent or
the Company shall make any assignment for the benefit of creditors; or (ii)
Parent or the Company shall be unable or shall fail, or shall admit in writing
its inability, to pay its debts as such debts become due; or the Board of
Directors of Parent or the Company (or any committee thereof) shall adopt any
resolution or otherwise authorize any action to approve any of the actions
referred to in clause (i) above or this clause (ii); or

SECTION 8.6.     Dissolution.

            Any order, judgment or decree shall be entered against Parent or the
Company decreeing the dissolution or split up of Parent or the Company and such
order shall remain undischarged or unstayed for a period in excess of 60 days;
or

SECTION 8.7.     Judgments and Attachments.

            Any money judgment(s), writ(s) or warrant(s) of attachment or
similar process(es) involving in the aggregate at any time an amount in excess
of (a) $15,000,000 for Parent and (b) $5,000,000 for the Company (not adequately
covered by insurance as to which a solvent and unaffiliated insurance company
has acknowledged coverage) shall be entered or filed against Parent or the
Company or any of their respective assets and shall remain undischarged,
unbonded or unstayed for a period of 60 days, excluding any judgment, writ or
warrant of attachment or similar process constituting, arising out of or
resulting from a breach of any representation, warranty or covenant by the
Company or Stockholders (as such terms are defined in the Merger Agreement)
under the Merger Agreement;

THEN (i) upon the occurrence of any Event of Default described in the foregoing
Section 8.4 or 8.5, each of the unpaid principal amount of and accrued interest
on the Notes and all other Obligations shall automatically become immediately
due and payable, without presentment, demand, protest or other requirements of
any kind, all of which are hereby expressly waived by Parent and the Company and
(ii) upon the occurrence and during the continuation of any other



                                       29
<PAGE>   36


Event of Default, Co-Agents shall, upon the written request of Requisite
Stockholders, by written notice to Parent and the Company, declare all or any
portion of the amounts described in clause (i) immediately above to be, and the
same shall forthwith become, immediately due and payable.

            Notwithstanding anything contained in the preceding paragraph, if at
any time within sixty (60) days after an acceleration of the Notes pursuant to
such paragraph Obligors shall pay all arrears of interest and all payments on
account of principal which shall have become due otherwise than as a result of
such acceleration (with interest on principal at the rates specified in this
Agreement) and all Events of Default (other than non-payment of the principal of
and accrued interest on the Notes, in each case which is due and payable solely
by virtue of acceleration) shall be remedied or waived, then Requisite
Stockholders, by written notice to Obligors, may at their option rescind and
annul such acceleration and its consequences; but such action shall not affect
any subsequent Event of Default or impair any right consequent thereon. The
provisions of this paragraph are intended merely to bind Significant
Stockholders to a decision which may be made at the election of Requisite
Stockholders and are not intended to benefit Obligors and do not grant Obligors
the right to require Significant Stockholders to rescind or annul any
acceleration hereunder, even if the conditions set forth herein are met.

                                  ARTICLE NINE

                      Co-Agents of Significant Stockholders

SECTION 9.1.     Appointment.

            The Representatives (as defined in the Merger Agreement) are hereby
appointed Co-Agents hereunder and under the other Financing Documents by
Significant Stockholders and each Significant Stockholder hereby authorizes each
Co-Agent to act as its agent in accordance with the terms of this Agreement and
the other Financing Documents. Each Co-Agent accepts such appointment and agrees
to act upon the express conditions contained in this Agreement and the other
Financing Documents, as applicable. The provisions of this Article 9 are solely
for the benefit of Co-Agents and Significant Stockholders, and Obligors shall
have no rights as a third party beneficiary of any of the provisions thereof. In
performing their functions and duties under this Agreement, Co-Agents shall act
solely as agents of Significant Stockholders and do not



                                       30
<PAGE>   37


assume and shall not be deemed to have assumed any obligation towards or
relationship of agency or trust with or for Obligors or any other Person (other
than Significant Stockholders).

SECTION 9.2.     Powers: General Immunity.


            (a) Duties Specified. Each Significant Stockholder irrevocably
authorizes each Co-Agent to take such action on such Significant Stockholder's
behalf and to exercise such powers hereunder and under the other Financing
Documents as are specifically delegated to Co-Agents by the terms hereof and
thereof, together with such powers as are reasonably incidental thereto.
Co-Agents shall have only those duties and responsibilities that are expressly
specified in this Agreement and the other Financing Documents and may perform
such duties by or through their agents or employees. Co-Agents shall not have,
by reason of this Agreement or any of the other Financing Documents, a fiduciary
relationship in respect of any Significant Stockholders; and nothing in this
Agreement or any of the other Financing Documents, expressed or implied, is
intended to or shall be so construed as to impose upon a Co-Agent any
obligations in respect of this Agreement or any of the other Financing Documents
except as expressly set forth herein or therein.

            (b) No Responsibility for Certain Matters. Co-Agents shall not be
responsible to any Significant Stockholders for the execution, effectiveness,
genuineness, validity, enforceability, collectibility or sufficiency of this
Agreement or any other Financing Document or for any representations,
warranties, recitals or statements made herein or therein or made in any written
or oral statement or in any instruments or certificates or any other documents
furnished or made by Co-Agents to Significant Stockholders or by or on behalf of
Obligors to Co-Agents or any Significant Stockholder in connection herewith or
therewith, nor shall Co-Agents be required to ascertain or inquire as to the
performance or observance of any of the terms, conditions, provisions, covenants
or agreements contained herein or therein or as to the existence or possible
existence of any Event of Default.

            (c) Exculpatory Provisions. Co-Agents and their respective officers,
directors, employees or agents shall not be liable to Significant Stockholders
for any action taken or omitted hereunder or in connection herewith by Co-Agents
except to the extent caused by Co-



                                       31
<PAGE>   38


Agents' gross negligence or willful misconduct. If a Co-Agent shall request
instructions from Significant Stockholders with respect to any act or action
(including the failure to take an action) in connection with this Agreement or
any of the other Financing Documents, such Co-Agent shall be entitled to refrain
from such act or taking such action unless and until such Co-Agent shall have
received instructions from Requisite Stockholders. Without prejudice to the
generality of the foregoing, (i) each Co-Agent shall be entitled to rely, and
shall be fully protected in relying, upon any communication, instrument or
document believed by it to be genuine and correct and to have been signed or
sent by the proper person or persons, and shall be entitled to rely and shall be
protected in relying on opinions and judgments of attorneys (who may be
attorneys for Parent or the Company), accountants, experts and other
professional advisors selected by it; and (ii) no Significant Stockholder shall
have any right of action whatsoever against a Co-Agent as a result of such
Co-Agent acting or (where so instructed) refraining from acting under this
Agreement or any of the other Financing Documents in accordance with the
instructions of Requisite Stockholders. Each Co-Agent shall be entitled to
refrain from exercising any power, discretion or authority vested in it under
this Agreement or any of the other Financing Documents unless and until it has
obtained the instructions of Requisite Stockholders. Each Co-Agent is authorized
to act in accordance with and upon the instructions of Requisite Stockholders.

            (d) Co-Agent Entitled to Act as Significant Stockholder. The agency
hereby created shall in no way impair or affect any of the rights and powers of,
or impose any duties or obligations upon, a Co-Agent in its individual capacity
as a Significant Stockholder hereunder. With respect to its participation in the
Notes, a Co-Agent that is a Significant Stockholder shall have the same rights
and powers hereunder as any other Significant Stockholder and may exercise the
same as though it were not performing the duties and functions delegated to it
hereunder, and the term "Significant Stockholder" or "Significant Stockholders"
or any similar term shall, unless the context clearly otherwise indicates,
include such Co-Agent in its individual capacity.




                                       32
<PAGE>   39

SECTION 9.3      Right to Indemnity.


            Each Significant Stockholder, in proportion to its Pro Rata Share,
severally agrees to indemnify each Co-Agent, for and against any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses (including, without limitation, counsel fees and disbursements)
or disbursements of any kind or nature whatsoever which may be imposed on,
incurred by or asserted against each Co-Agent in performing its duties hereunder
or under the other Financing Documents or otherwise in its capacity as Co-Agent
in any way relating to or arising out of this Agreement or the other Financing
Documents; provided that no Significant Stockholder shall be liable for any
portion of such liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, costs, expenses or disbursements resulting from a Co-Agent's
gross negligence or willful misconduct. If any indemnity furnished to a Co-Agent
for any purpose shall, in the opinion of such Co-Agent, be insufficient or
become impaired, such Co-Agent may call for additional indemnity and cease, or
not commence, to do the acts indemnified against until such additional indemnity
is furnished.

SECTION 9.4.     Payee of Note Treated as Owner.


            Co-Agents may deem and treat the payee of any Note as the owner
thereof for all purposes hereof unless and until a written notice of the
assignment or transfer thereof shall have been filed with Co-Agents. Any
request, authority or consent of or any payment to any person or entity who, at
the time of making such request or giving such authority or consent, or
receiving such payment, is the holder of any Note shall be conclusive and
binding on any subsequent holder, transferee or assignee of that Note or of any
Note or Notes issued in exchange therefor.

SECTION 9.5.     Successor Co-Agents.

            A Co-Agent may resign at any time by giving thirty (30) days' prior
written notice thereof to Significant Stockholders, Parent and the Company, and
a Co-Agent may be removed at any time with or without cause by an instrument or
concurrent instruments in writing delivered to Parent, the Company and Co-Agents
and signed by Requisite Stockholders. Upon any such notice of resignation or any
such removal, Requisite Stockholders shall have the right, upon five Business
Days' notice to Obligors, to appoint a successor Co-Agent. Upon the



                                       33
<PAGE>   40


acceptance of any appointment as Co-Agent hereunder by a successor Co-Agent,
that successor Co-Agent shall thereupon succeed to and become vested with all
the rights, powers, privileges and duties of the retiring or removed Co-Agent
and the retiring or removed Co-Agent shall be discharged from its duties and
obligations under this Agreement. After any retiring or removed Co-Agent's
resignation or removal hereunder as Co-Agent, the provisions of this Article 9
shall inure to its benefit as to any actions taken or omitted to be taken by it
while it was a Co-Agent under this Agreement.

                                   ARTICLE TEN

                               Security for Notes

SECTION 10.1     Security.

            The payment and performance of Parent's and the Company's
Obligations under the Notes will at all times be secured as follows:

                 (a) Grant of Security Interest. As security for the due
performance and payment of the Obligations, (i) the Company hereby grants to
Co-Agents, on behalf of the Significant Stockholders, a security interest in and
lien on the "Company Collateral" as defined in Section 10.1(b), and (ii) Parent
hereby pledges and grants a lien to Co-Agents, on behalf of the Significant
Stockholders, in the "Pledged Collateral" as defined in Section 10.1(b).

                 (b) Collateral Defined. The term "Company Collateral" means,
collectively, whether or not covered by Article 9 of the Uniform Commercial
Code, any and all of the assets, properties, goods, inventory, equipment,
furniture, fixtures, leases, supplies, records, money, deposit accounts, Capital
Stock of Subsidiaries of the Company, documents, instruments, chattel paper,
accounts, contract rights, investment property, financial assets, intellectual
property rights (including, but not limited to, copyrights, copyright
applications, moral rights, patents, patent applications, trademarks, service
marks, trade names and trade secrets) and other general intangibles, of the
Company, whether owned by the Company on the date of this Agreement or hereafter
acquired, and all products and proceeds thereof. Notwithstanding the foregoing
provisions of this Section 10.1(b), such grant of security interest



                                       34
<PAGE>   41


shall not extend to, and the term "Company Collateral" shall not include, any
equipment lease, real property lease or chattel paper which is now or hereafter
held by the Company as licensee, lessee or otherwise, to the extent that (a)
such equipment lease, real property lease or chattel paper is not assignable or
capable of being encumbered as a matter of law or under the terms of the
license, lease or other agreement applicable thereto (but solely to the extent
that any such restriction shall be enforceable under applicable law), without
the consent of the licensor or lessor thereof or other applicable party thereto
and (b) such consent has not been obtained; provided, however, that the
foregoing grant of security interest shall extend to, and the term "Company
Collateral" shall include, (i) any and all proceeds of such equipment lease,
real property lease or chattel paper to the extent that the assignment or
encumbering of such proceeds is not so restricted and (ii) upon the consent of
any such licensor, lessor or other applicable party with respect to any such
otherwise excluded equipment lease, real property lease or chattel paper being
obtained (which consent shall be required only at a Co-Agent's request following
an Event of Default hereunder), thereafter such equipment lease, real property
lease or chattel paper as well as any and all proceeds thereof that might
theretofore have been excluded from such grant of a security interest and the
term "Company Collateral".

            The term "Pledged Collateral" means the Capital Stock of the Company
held by Parent, now or hereafter, and all dividends and distributions thereon.
In the event that any stock dividend, reclassification, readjustment, stock
split or other change is declared or made with respect to the Pledged
Collateral, or if warrants or any other rights, options or securities are issued
to Parent in respect of the Pledged Collateral, then all new, substituted and/or
additional shares or other securities issued by reason of such change or by the
exercise of such warrants, rights, options or securities will be automatically
pledged to Co-Agents and become part of the Pledged Collateral. Notwithstanding
this Agreement, so long as Parent owns the Pledged Collateral and no Event of
Default has occurred and is continuing, Parent will be entitled to vote any
shares comprising the Pledged Collateral, subject to any proxies granted by
Parent.

            The Company Collateral and Pledged Collateral shall be referred to
herein as the "Collateral".




                                       35
<PAGE>   42

                 (c) Delivery of Certain Collateral. Any Collateral (other than
checks) as to which possession is required under applicable law to perfect
Co-Agents' security interest therein, shall be delivered to Co-Agents or, at
Parent's request, an independent escrow holder acceptable to Parent and
Co-Agents. Any such Collateral shall be duly endorsed and accompanied by duly
executed instruments of transfer or assignment in blank, as applicable.

                 (d) Financing Statements. So long as Obligors have any
Obligations to Significant Stockholders under the Notes, Obligors will promptly
execute and deliver to Co-Agents such notices, financing statements, or other
documents and papers (including, but not limited to, such documents as may be
filed with the U.S. Register of Copyrights and the U.S. Patent and Trademark
Office in order to perfect Co-Agents' security interest in the Company's
patents, patent applications, registered trademarks, registered copyrights and
applications therefor) as Co-Agents may reasonably require in order to perfect
and maintain the security interest in and lien on the Collateral granted to
Co-Agents hereby. Notwithstanding the foregoing provisions of this Section
10.1(d), and except upon the occurrence and during the continuation of an Event
of Default, the Company shall not be required to take any action that would
restrict or limit its access to its deposit accounts. Upon the full and final
discharge of all of the Obligations, each Co-Agent and each Significant
Stockholder will execute and deliver such documents as may be reasonably
necessary and requested and provided by Obligors to release the Collateral from
the security interest and lien granted to Co-Agents in this Agreement, and
return (or cause to be returned) to Obligors any Collateral in the possession of
Co-Agents or their agents including, without limitation, the Pledged Collateral.

                 (e) Co-Agents' Obligations and Duties. The Significant
Stockholders hereby appoint each Co-Agent to act as the agent, attorney-in-fact
and representative of the Significant Stockholders to execute and deliver any
and all documents, and to exercise any and all rights and remedies of the
Significant Stockholders under this Article 10, by and on behalf of the
Significant Stockholders. Anything herein to the contrary notwithstanding,
Obligors shall remain liable under each contract or agreement comprised in the
Collateral to be observed or performed by them thereunder. A Co-Agent shall not
have any obligation or liability under any such contract or agreement by reason
of or arising out of this Agreement or the receipt by a Co-Agent of any payment
relating to any of the Collateral, nor shall a Co-Agent be obligated in any



                                       36
<PAGE>   43


manner to perform any of the obligations of Obligors under or pursuant to any
such contract or agreement, to make inquiry as to the nature or sufficiency of
any payment received by a Co-Agent in respect of the Collateral or as to the
sufficiency of any performance by any party under any such contract or
agreement, to present or file any claim, to take any action to enforce any
performance or to collect the payment of any amounts which may have been
assigned to Co-Agents or to which Co-Agents may be entitled at any time or
times. Co-Agents' sole duty with respect to the custody, safe keeping and
physical preservation of the Collateral in its possession, under Section 9-207
of the Uniform Commercial Code of the State of California or otherwise, shall be
to deal with such Collateral in the same manner as Co-Agents deal with similar
property for their own accounts.

SECTION 10.2.    Rights and Remedies Upon Event of Default.

                 (a) Remedies. If an Event of Default shall have occurred and be
continuing, Co-Agents may, without notice to or demand upon Obligors, declare
this Agreement to be in default, and Co-Agents shall thereafter have in any
jurisdiction in which enforcement hereof is sought, in addition to all other
rights and remedies available under contract and applicable law, the rights and
remedies of a secured party under the Uniform Commercial Code, including,
without limitation, the right to take possession of the Collateral, and for that
purpose Co-Agents may, so far as Obligors can give authority therefor, enter
upon any premises on which the Collateral may be situated and remove the same
therefrom. Co-Agents may in their discretion require Obligors to assemble all or
any part of the Collateral at such location or locations within the state(s) of
Obligors' principal offices(s) or at such other locations as Co-Agents may
designate. Unless the Collateral is perishable or threatens to decline speedily
in value or is of a type customarily sold on a recognized market, Co-Agents
shall give to Obligors at least ten (10) Business Days' prior written notice of
the time and place of any public sale of Collateral or of the time after which
any private sale or any other intended disposition is to be made. Obligors
hereby acknowledges that ten (10) Business Days' prior written notice of such
sale or sales shall be reasonable notice.



                                       37
<PAGE>   44


                 (b) No Election of Remedies. The election by Co-Agent of any
right or remedy will not prevent it from exercising any other right or remedy
against Obligors. All rights and remedies are cumulative.

                 (c) Sales of Collateral. Any item of Collateral may be sold for
cash or other value at public or private sale or other disposition and the
proceeds thereof collected by or for the Significant Stockholders. Obligors
agree to promptly execute and deliver, or promptly cause to be executed and
delivered, such instruments, documents, assignments, waivers, certificates and
affidavits and supply or cause to be supplied such further information and take
such further action as Co-Agents may require in connection with any such sale or
disposition. Co-Agents will have the right upon any such public sale or sales,
and, to the extent permitted by law, upon any such private sale or sales, to
purchase the whole or any part of the Collateral so sold, free of any right or
equity of redemption in Obligors, which right or equity is hereby waived or
released.

                 (d) Application of Proceeds. The proceeds of all sales and
collections in respect of the Collateral, the application of which is not
otherwise specifically herein provided for, will be applied as follows: (i)
first, to the payment of the costs and expenses of such sale or sales and
collections and the attorneys' fees and out-of-pocket expenses incurred by
Co-Agents relating to costs of collection; (ii) second, any surplus then
remaining will be applied first to the pro rata payment of all unpaid interest
accrued under each Note, and then to the pro rata payment of unpaid principal
under each Note; and (iii) third, any surplus then remaining will be paid to
Obligors, as applicable.

SECTION 10.3.    Termination.

            When all Obligations have been paid and performed in full and
discharged, all security interests and other Liens granted to Co-Agents under
this Agreement will terminate.



                                       38
<PAGE>   45


                                 ARTICLE ELEVEN

                                  Miscellaneous


SECTION 11.1.    Ratable Sharing.

            Significant Stockholders hereby agree among themselves that if any
of them shall, whether by voluntary payment, by realization upon security,
through the exercise of any right of set-off or recoupment, by counterclaim or
cross-action or by the enforcement of any right under the Financing Documents or
otherwise, or as adequate protection of a deposit treated as cash collateral
under the Bankruptcy Code, receive payment or reduction of a proportion of the
aggregate amount of principal, interest, fees and other amounts then due and
owing to that Significant Stockholder hereunder or under the other Financing
Documents (collectively, the "Aggregate Amounts Due" to such Significant
Stockholder) which is greater than the proportion received by any other
Significant Stockholder in respect of the Aggregate Amounts Due to such other
Significant Stockholder, then the Significant Stockholder receiving such
proportionately greater payment shall (i) notify Co-Agents and each other
Significant Stockholder of the receipt of such payment and (ii) apply a portion
of such payment to purchase participations (which it shall be deemed to have
purchased from each seller of a participation simultaneously upon the receipt by
such seller of its portion of such payment) in the Aggregate Amounts Due to the
other Significant Stockholders so that all such recoveries of Aggregate Amounts
Due shall be shared by all Significant Stockholders in proportion to the
Aggregate Amounts Due to them; provided that if all or part of such
proportionately greater payment received by such purchasing Significant
Stockholder is thereafter recovered from such Significant Stockholder upon the
bankruptcy or reorganization of Parent or the Company or otherwise, those
purchases shall be rescinded and the purchase prices paid for such
participations shall be returned to such purchasing Significant Stockholder
ratably to the extent of such recovery, but without interest. Obligors expressly
consent to the foregoing arrangement and agree that any holder of a
participation so purchased may exercise any and all rights of set-off,
recoupment or counterclaim with respect to any and all monies owing by Parent or
the Company to that holder with respect thereto as fully as if that holder were
owed the amount of the participation held by that holder.





                                       39
<PAGE>   46

SECTION 11.2.    Set Off.

            In addition to any rights now or hereafter granted under applicable
law and not by way of limitation of any such rights, Obligors are hereby
authorized by each Significant Shareholder at any time or from time to time,
without notice to Significant Shareholders or to any other Person, any such
notice being hereby expressly waived, to set off, recoup or to appropriate and
to apply any and all indebtedness at any time held or owing by Obligors to or
for the credit or the account of Significant Stockholders against and on account
of the obligations and liabilities of Significant Stockholders to Obligors
arising out of indemnity claims of Parent to the extent that such claims have
been resolved in Parent's favor in accordance with the Indemnity Section and the
Escrow Agreement. Any such setoff, recoupment, appropriation or application
shall be subject to the terms, conditions and limitations of the Indemnity
Section and Escrow Agreement. Except as provided in this Section 11.2 and in the
Indemnity Section and Escrow Agreement, Obligors shall have no other right of
setoff or recoupment with respect to the Obligations.

SECTION 11.3.    Governing Law.

            The internal laws of the State of California (irrespective of its
choice of law principles) will govern the validity of the Financing Documents,
the construction of their terms, and the interpretation and enforcement of the
rights and duties of the parties thereto.

SECTION 11.4.    Assignment; Successors and Assigns.

            Except as set forth in Section 5.1, no party hereto may assign or
delegate any of its rights or obligations under the Financing Documents without
the prior written consent of the Obligors and Requisite Stockholders. Any
purported assignment not permitted by this Section shall be void. The Financing
Documents will be binding upon and inure to the benefit of the parties hereto
and their respective successors and permitted assigns.

SECTION 11.5.    Severability.

            If any provision of this Agreement, or the application thereof, is
for any reason held to any extent to be invalid or unenforceable, the remainder
of this Agreement and



                                       40
<PAGE>   47


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 unenforceable provision of this Agreement
with a valid and enforceable provision that will achieve, to the extent
possible, the economic, business and other purposes of the void or unenforceable
provision.

SECTION 11.6.    Counterparts.

            This Agreement may be executed in counterparts, each of which will
be an original as regards any party whose name appears thereon and all of which
together will constitute one and the same instrument. This Agreement will become
binding when one or more counterparts hereof, individually or taken together,
bear the signatures of all parties reflected hereon as signatories.

SECTION 11.7.    Other Remedies.

            Except as otherwise provided herein, any and all remedies herein
expressly conferred upon a party will be deemed cumulative with and not
exclusive of any other remedy conferred hereby or by law on such party, and the
exercise of any one remedy will not preclude the exercise of any other.

SECTION 11.8.    Amendment and Waivers.

            Any term or provision of this Agreement may be amended only by a
writing signed by Obligors and Requisite Stockholders. The observance of any
term of this Agreement may be waived (either generally or in a particular
instance and either retroactively or prospectively), only by a writing signed by
the party to be bound thereby. The waiver by a party of any breach hereof or
default in the performance hereof will not be deemed to constitute a waiver of
any other default or any succeeding breach or default. The failure of any party
to enforce any of the provisions hereof or any other Financing Document will not
be construed to be a waiver of the right of such party thereafter to enforce
such provisions.




                                       41
<PAGE>   48

SECTION 11.9.    Expenses.

            Each party will bear its respective expenses and fees of its own
accountants, attorneys, investment bankers and other professionals incurred with
respect to the execution of this Agreement, the other Financing Documents and
the transactions contemplated hereby, except that Obligors shall bear, or
reimburse Co-Agents for, reasonable fees and expenses incurred by Co-Agents in
preparing and filing the documents described in Section 10.1(d) hereof.

SECTION 11.10.   Attorneys' Fees.

            Should suit be brought to enforce or interpret any part of this
Agreement or the other Financing Documents, the prevailing party will be
entitled to recover, as an element of the costs of suit and not as damages,
reasonable attorneys' fees to be fixed by the court (including without
limitation, costs, expenses and fees on any appeal). The prevailing party will
be entitled to recover its costs of suit, regardless of whether such suit
proceeds to final judgment.

SECTION 11.11.   Notices.

            Any notice or other communication required or permitted to be given
under this Agreement will be in writing, will be delivered personally, by mail
or express delivery, postage prepaid, or telecopy (confirmed in writing) and
will be deemed given upon actual delivery or, if mailed by registered or
certified mail, on the third business day following deposit in the mails,
addressed as follows:

                               (i)        If to Parent and/or the Company:

                                          Tekelec
                                          26580 West Agoura Road
                                          Calabasas, CA 91302
                                          Attention: General Counsel
                                          Fax: (818) 880-0176




                                       42
<PAGE>   49

                                          with a copy to:

                                          Fenwick & West LLP
                                          Two Palo Alto Square
                                          Palo Alto, California  94306
                                          Attention:  Dennis R. DeBroeck
                                          Fax:  415-494-1417

                               (ii)       If to the Co-Agents and/or Significant
                                          Stockholders:

                                          Thomas Loo, Esq.
                                          Bryan Cave LLP
                                          120 Broadway, Suite 300
                                          Santa Monica, CA 90404
                                          Fax:  (310) 576-2200


                                          Gary Crockett
                                          IEX Corporation
                                          2425 North Central Expressway
                                          Richardson, TX 75080-2736
                                          Fax:  (972)301-4854

                                          with a copy to:

                                          Bryan Cave LLP
                                          120 Broadway, Suite 300
                                          Santa Monica, CA  90404
                                          Attention:  Tom Loo, Esq.
                                          Fax: 310-576-2200


         or to such other address as the party in question may have furnished to
the other parties by written notice given in accordance with this Section 11.11.




                                       43
<PAGE>   50



SECTION 11.12.   Construction of Agreement.

         The language hereof will not be construed for or against any party. A
reference to an article, Section or exhibit will mean an article or Section in,
or an exhibit to, this Agreement, unless otherwise explicitly set forth. The
titles and headings in this Agreement are for reference purposes only and will
not in any manner limit the construction of this Agreement. For the purposes of
such construction, this Agreement will be considered as a whole.

SECTION 11.13.   Further Assurances.

         Each party agrees to cooperate fully with the other party and to
execute such further instruments, documents and agreements and to give such
further written assurances as may be reasonably requested by the other parties
to evidence and reflect the transactions provided for herein and to carry into
effect the intent of this Agreement.

SECTION 11.14.   Other Waivers.

         Until the Obligations are satisfied in full, (a) Parent and the Company
each waive, to the fullest extent permitted by law, any defense or benefit that
may be derived from or afforded by law that limits the liability of or
exonerates guarantors or sureties, including, without limitation, California
Civil Code sections 2809, 2810, 2819, 2845, 2847, 2849 and 2850, and (b) neither
Parent nor the Company shall pursue rights of subrogation or contribution
against the other with respect to the Obligations.

SECTION 11.15.   Entire Agreement

         This Agreement, the Notes, the exhibits hereto and thereto and
agreements (or portions thereof) referenced herein or therein constitute the
entire understanding and agreement of the parties hereto with respect to the
subject matter of the Financing Documents and supersede all prior and
contemporaneous agreements or understandings, inducements or conditions, express
or implied, written or oral, between the parties with respect to the subject
matter of the Financing Documents. The express terms of the Financing Documents
control and supersede any course of performance or usage of trade inconsistent
with any of the terms of the Financing Documents.




                                       44
<PAGE>   51


SECTION 11.16.   Submission to Jurisdiction; Waiver of Jury Trial

         EACH OF THE PARTIES TO THIS AGREEMENT HEREBY IRREVOCABLY SUBMITS TO THE
JURISDICTION OF ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF
LOS ANGELES IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR
RELATING TO THE FINANCING DOCUMENTS AND/OR SEEKING INJUNCTIVE OR EQUITABLE
RELIEF, AND IRREVOCABLY ACCEPTS FOR ITSELF AND IN RESPECT OF ITS PROPERTY,
GENERALLY AND UNCONDITIONALLY, JURISDICTION OF THE AFORESAID COURTS. EACH OF THE
PARTIES TO THIS AGREEMENT HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT SUCH
PARTY MAY EFFECTIVELY DO SO UNDER APPLICABLE LAW, TRIAL BY JURY AND ANY
OBJECTION THAT SUCH PARTY MAY NOW OR HEREAFTER HAVE TO THE LAYING OF VENUE OF
ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN ANY SUCH COURT WITH RESPECT TO
ANY FINANCING DOCUMENT AND ANY CLAIM THAT SUCH SUIT, ACTION OR PROCEEDING HAS
BEEN BROUGHT IN AN INCONVENIENT FORUM.






                                       45
<PAGE>   52

                                   SIGNATURES

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and attested, all as of the date first above written.



                                            TEKELEC


                                            By: /s/ GILLES C. GODIN
                                               -------------------------------
                                            Title: CFO and Vice President,
                                                   Finance


                                            IEX CORPORATION


                                            By: /s/ GARY CROCKET
                                               -------------------------------
                                            Title: CEO


                                            TEKNEKRON PARTNERS II


                                            By: /s/ LESLIE K. WAGNER
                                              -------------------------------
                                            Title: General Partner


                                            IEX PARTNERS


                                            By: /s/ LESLIE K. WAGNER
                                               -------------------------------
                                            Title: General Partner


                                            TEKNEKRON CORPORATION


                                            By: /s/ HARVEY E. WAGNER
                                               -------------------------------
                                            Title: CEO






                                       46
<PAGE>   53


                                            /s/ GARY CROCKETT 
                                            ---------------------------------- 
                                            Gary Crockett

                                            /s/ STEPHEN LYNN 
                                            ----------------------------------
                                            Stephen Lynn

                                            /s/ DEBRA MAY
                                            ----------------------------------
                                            Debra May

                                            /s/ DAVID LAIZEROVICH 
                                            ----------------------------------
                                            David Laizerovich

                                            /s/ JEFFREY KUPP 
                                            ----------------------------------
                                            Jeffrey Kupp

                                            /s/ JEROME BALL
                                            ----------------------------------
                                            Jerome Ball

                                            /s/ JOE DEFENDERFER 
                                            ----------------------------------
                                            Joe Defenderfer

                                            /s/ BRAD SIMMONS 
                                            ----------------------------------
                                            Brad Simmons






                                       47
<PAGE>   54

                         EXHIBIT A (Note and Security Agreement)
                         EXHIBIT B (Agreement and Plan of Reorganization)


THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC. EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                         FORM OF SECURED PROMISSORY NOTE

$________________                                             as of May 7, 1999

         FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of [INSERT NAME OF SIGNIFICANT
STOCKHOLDER] ("Holder"):

            (a) prior to or on the Maturity Date the principal amount of [INSERT
AMOUNT] DOLLARS ($_______________), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

            (b) interest from the date hereof on the principal amount from time
to time outstanding to and including the maturity hereof at the rates and terms
and in all cases in accordance with the terms of the Note Agreement.

         This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of



<PAGE>   55


the Note Agreement and may enforce the agreements of the Obligors contained
therein, and any holder hereof may exercise the respective remedies provided for
thereby or otherwise available in respect thereof, all in accordance with the
respective terms thereof. All capitalized terms used in this Note and not
otherwise defined herein shall have the same meanings herein as in the Note
Agreement.

         The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

         If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

         No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

         Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

         THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.




<PAGE>   56


         IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.



                                            TEKELEC


                                            By:_______________________________
                                               Title:




                                            IEX CORPORATION



                                            By:_______________________________
                                               Title:



<PAGE>   1
                                                                    EXHIBIT 4.02


                SECURED PROMISSORY NOTES DATED AS OF MAY 7, 1999
                                     made by
                  Tekelec and IEX Corporation in favor of the
                  Significant Stockholders of IEX Corporation
<PAGE>   2
                                                                    EXHIBIT 4.02


THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$28,352,216.97                                                as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of IEX Partners ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Twenty-Eight Million Three Hundred Fifty-Two Thousand Two Hundred Sixteen
Dollars and Ninety-Seven Cents ($28,352,216.97), evidencing the indebtedness
owing by the Obligors to Holder pursuant to the Note and Security Agreement
dated as of May 7, 1999 (as amended and in effect from time to time, and as
subject by its terms to the Agreement and Plan of Reorganization, dated April
20, 1999 and other documents referenced in such Note and Security Agreement, the
"Note Agreement"), by and among the Obligors and the Significant Stockholders;
and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   3

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   4

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$4,764,910.97                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of IEX Partners ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Four
Million Seven Hundred Sixty-Four Thousand Nine Hundred Ten Dollars and
Ninety-Seven Cents ($4,764,910.97), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   5

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   6

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$31,240,765.21                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Teknekron Partners II
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Thirty-One Million Two Hundred Forty Thousand Seven Hundred Sixty-Five Dollars
and Twenty-One Cents ($31,240,765.21), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.

<PAGE>   7

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   8

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$5,250,364.20                                                  as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Teknekron Partners II
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Five
Million Two Hundred Fifty Thousand Three Hundred Sixty-Four Dollars and Twenty
Cents ($5,250,364.20), evidencing the indebtedness owing by the Obligors to
Holder pursuant to the Note and Security Agreement dated as of May 7, 1999 (as
amended and in effect from time to time, and as subject by its terms to the
Agreement and Plan of Reorganization, dated April 20, 1999 and other documents
referenced in such Note and Security Agreement, the "Note Agreement"), by and
among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.

<PAGE>   9

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.



                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   10

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$3,449,483.55                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Teknekron Corporation
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Three Million Four Hundred Forty-Nine Thousand Four Hundred Eighty-Three Dollars
and Fifty-Five Cents ($3,449,483.55), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   11

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   12

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$579,724.75                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Teknekron Corporation
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Five
Hundred Seventy-Nine Thousand Seven Hundred Twenty-Four Dollars and Seventy-Five
Cents ($579,724.75), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   13
\
        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   14

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$11,334,017.39                                                as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Gary Crockett ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Eleven Million Three Hundred Thirty-Four Thousand Seventeen Dollars and
Thirty-Nine Cents ($11,334,017.39), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   15

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   16

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$1,904,809.91                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Gary Crockett ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Million Nine Hundred Four Thousand Eight Hundred Nine Dollars and Ninety-One
Cents ($1,904,809.91), evidencing the indebtedness owing by the Obligors to
Holder pursuant to the Note and Security Agreement dated as of May 7, 1999 (as
amended and in effect from time to time, and as subject by its terms to the
Agreement and Plan of Reorganization, dated April 20, 1999 and other documents
referenced in such Note and Security Agreement, the "Note Agreement"), by and
among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   17

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   18

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$1,971,133.46                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Stephen Lynn ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Million Nine Hundred Seventy-One Thousand One Hundred Thirty-Three Dollars and
Forty-Six Cents ($1,971,133.46), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   19

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   20

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$331,271.29                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Stephen Lynn ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Three Hundred Thirty-One Thousand Two Hundred Seventy-One Dollars and
Twenty-Nine Cents ($331,271.29), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   21

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.



                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   22

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$985,566.73                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Jeffrey Kupp ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Nine
Hundred Eighty-Five Thousand Five Hundred Sixty-Six Dollars and Seventy-Three
Cents ($985,566.73), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   23

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   24

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$165,635.64                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Jeffrey Kupp ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Hundred Sixty-Five Thousand Six Hundred Thirty-Five Dollars and Sixty-Four Cents
($165,635.64), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   25

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.



                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   26

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$2,020,411.79                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of David Laizerovich
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Two
Million Twenty Thousand Four Hundred Eleven Dollars and Seventy-Nine Cents
($2,020,411.79), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.

<PAGE>   27
\
        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

 
<PAGE>   28

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$339,553.07                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of David Laizerovich
("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Three Hundred Thirty-Nine Thousand Five Hundred Fifty-Three Dollars and Seven
Cents ($339,553.07), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   29

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   30

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$2,118,968.47                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Debra May ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Two
Million One Hundred Eighteen Thousand Nine Hundred Sixty-Eight Dollars and
Forty-Seven Cents ($2,118,968.47), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   31

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   32

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$356,116.63                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Debra May ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Three Hundred Fifty-Six Thousand One Hundred Sixteen Dollars and Sixty-Three
Cents ($356,116.63), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   33

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   34

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$2,069,690.13                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Brad Simmons ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of Two
Million Sixty-Nine Thousand Six Hundred Ninety Dollars and Thirteen Cents
($2,069,690.13), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   35

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   36

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$347,834.85                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Brad Simmons ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of
Three Hundred Forty-Seven Thousand Eight Hundred Thirty-Four Dollars and
Eighty-Five Cents ($347,834.85), evidencing the indebtedness owing by the
Obligors to Holder pursuant to the Note and Security Agreement dated as of May
7, 1999 (as amended and in effect from time to time, and as subject by its terms
to the Agreement and Plan of Reorganization, dated April 20, 1999 and other
documents referenced in such Note and Security Agreement, the "Note Agreement"),
by and among the Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.

<PAGE>   37

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   38

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$1,034,845.07                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Joe Defenderfer ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Million Thirty-Four Thousand Eight Hundred Forty-Five Dollars and Seven Cents
($1,034,845.07), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   39

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   40

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$173,917.43                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Joe Defenderfer ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Hundred Seventy-Three Thousand Nine Hundred Seventeen Dollars and Forty-Three
Cents ($173,917.43), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   41

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   42

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$1,034,845.07                                                 as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Jerome Ball ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Million Thirty-Four Thousand Eight Hundred Forty-Five Dollars and Seven Cents
($1,034,845.07), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   43

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner

<PAGE>   44

THIS NOTE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF A NOTE AND
SECURITY AGREEMENT DATED AS OF MAY 7, 1999 (A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF TEKELEC). EXCEPT AS OTHERWISE PROVIDED IN SUCH AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THIS
NOTE MAY BE MADE EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE `ACT'), OR (B) IF TEKELEC HAS
BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER THAT SUCH
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN
EFFECT THEREUNDER AND OTHER APPLICABLE SECURITIES LAWS.


                             SECURED PROMISSORY NOTE

$173,917.43                                                   as of May 7, 1999

        FOR VALUE RECEIVED, the undersigned Tekelec, a California corporation,
and IEX Corporation, a Nevada corporation, (collectively the "Obligors"), hereby
jointly and severally promise to pay to the order of Jerome Ball ("Holder"):

               (a) prior to or on the Maturity Date the principal amount of One
Hundred Seventy-Three Thousand Nine Hundred Seventeen Dollars and Forty-Three
Cents ($173,917.43), evidencing the indebtedness owing by the Obligors to Holder
pursuant to the Note and Security Agreement dated as of May 7, 1999 (as amended
and in effect from time to time, and as subject by its terms to the Agreement
and Plan of Reorganization, dated April 20, 1999 and other documents referenced
in such Note and Security Agreement, the "Note Agreement"), by and among the
Obligors and the Significant Stockholders; and

               (b) interest from the date hereof on the principal amount from
time to time outstanding to and including the maturity hereof at the rates and
terms and in all cases in accordance with the terms of the Note Agreement.

        This Note evidences indebtedness under and has been issued by the
Obligors in accordance with the terms of the Note Agreement. Holder is entitled
to the benefits of the Note Agreement and may enforce the agreements of the
Obligors contained therein, and any holder hereof may exercise the respective
remedies provided for thereby or otherwise available in respect thereof, all in
accordance with the respective terms thereof. All capitalized terms used in this
Note and not otherwise defined herein shall have the same meanings herein as in
the Note Agreement.
<PAGE>   45

        The Obligors have the right, and the obligation under certain
circumstances, to prepay the whole or part of the principal of this Note on the
terms and conditions specified in the Note Agreement.

        If any one or more of the Events of Default shall occur, the entire
unpaid principal amount of this Note and all of the unpaid interest accrued
thereon may become or be declared due and payable in the manner and with the
effect provided in the Note Agreement.

        No delay or omission on the part of Holder in exercising any right
hereunder shall operate as a waiver of such right or of any other rights of
Holder, nor shall any delay, omission or waiver on any one occasion be deemed a
bar or waiver of the same or any other right on any future occasion.

        Obligors hereby waive presentment, demand, notice, notice of
acceleration, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, and
assents to any extension or postponement of the time of payment or any other
indulgence, to any substitution, exchange or release of collateral and to the
addition or release of any other party or person liable.

        THIS NOTE AND THE OBLIGATIONS OF OBLIGORS HEREUNDER SHALL FOR ALL
PURPOSES BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
CALIFORNIA (EXCLUDING THE LAWS APPLICABLE TO CONFLICTS OR CHOICE OR LAW).
OBLIGORS AGREE THAT ANY SUIT FOR THE ENFORCEMENT OF THIS NOTE MAY BE BROUGHT IN
ANY CALIFORNIA STATE OR FEDERAL COURT SITTING IN THE COUNTY OF LOS ANGELES AND
CONSENT TO THE NONEXCLUSIVE JURISDICTION OF SUCH COURT AND THE SERVICE OF
PROCESS IN ANY SUCH SUIT BEING MADE UPON OBLIGORS BY MAIL AT THE ADDRESS
SPECIFIED IN SECTION 11.11 OF THE NOTE AGREEMENT. OBLIGORS HEREBY WAIVE TRIAL BY
JURY AND ANY OBJECTION THAT THEY MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY
SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT
COURT.

        IN WITNESS WHEREOF, each of the undersigned, jointly and severally, has
caused this Note to be signed by its duly authorized officer as of the day and
year first above written.


                                     TEKELEC


                                     By: /s/ JILLES C. GODWIN
                                        --------------------------------------
                                             Jilles C. Godwin

                                        Title: Chief Financial Officer and
                                               Vice President of Finance


                                     IEX CORPORATION

                                     By: /s/ THOMAS J. LOO
                                        -------------------------------------
                                        Thomas J. Loo
  
                                        Title: Partner


<PAGE>   1


                                                                   EXHIBIT 23.1



                        CONSENT OF INDEPENDENT AUDITORS



We consent to the use of our report dated February 23, 1999, with respect to the
financial statements of IEX Corporation included in this Current Report on Form
8-K of Tekelec.

We also consent to the incorporation by reference in the Registration
Statements of Tekelec on Form S-8 (File Nos. 33-48079, 33-82124, 33-60611,
333-05933, 333-28887, 333-37843, 333-71261) of our report dated February 23,
1999, with respect to the financial statements of IEX Corporation included in
this Current Report on Form 8-K of Tekelec.


                                             /s/ ERNST & YOUNG LLP


Dallas, Texas
May 11, 1999





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