<PAGE>
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS


Independent Auditors' Report................................................ F-1

Consolidated Balance Sheets as of December 31, 2000 and 1999................ F-2

Consolidated Statements of Operations for the fiscal years ended
     December 31, 2000, 1999, and 1998...................................... F-3

Consolidated Statements of Stockholders' Equity for the fiscal
     years ended December 31, 2000, 1999, and 1998.......................... F-4

Consolidated Statements of Cash Flows for the fiscal years ended
     December 31, 2000, 1999, and 1998...................................... F-5

Notes to Consolidated Financial Statements.................................. F-6

<PAGE>


                          INDEPENDENT AUDITORS' REPORT


To the Board of Directors and Stockholders
Applied Innovation Inc.:


We have audited the accompanying consolidated balance sheets of Applied
Innovation Inc. and subsidiary as of December 31, 2000 and 1999, and the related
consolidated statements of operations, stockholders' equity, and cash flows for
each of the years in the three-year period ended December 31, 2000. These
consolidated financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
financial statements based on our audits.

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

In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Applied Innovation
Inc. and subsidiary as of December 31, 2000 and 1999, and the results of their
operations and their cash flows for each of the years in the three-year period
ended December 31, 2000 in conformity with accounting principles generally
accepted in the United States of America.





/s/ KPMG LLP
Columbus, Ohio
February 2, 2001




                                      F-1
<PAGE>


                            APPLIED INNOVATION INC.


                          Consolidated Balance Sheets


<TABLE>
<CAPTION>
                                                                                                          At December 31,
                                                                                                          ---------------
                                         Assets                                                     2000                   1999
                                         ------                                                     ----                   ----
<S>                                                                                             <C>                    <C>
Current assets:
    Cash and cash equivalents                                                                   $ 14,020,080           $ 11,928,868
    Short-term investments                                                                         6,386,236              1,794,581
    Accounts receivable, net of allowance of $690,602 in 2000 and $317,547 in 1999                29,990,699             10,990,025
    Inventory                                                                                     12,009,060              3,913,432
    Prepaid expenses                                                                                 852,984                500,631
    Deferred income taxes                                                                          2,642,000              1,231,000
                                                                                                ------------           ------------
                      Total current assets                                                        65,901,059             30,358,537
                                                                                                ------------           ------------

Property, plant and equipment:
    Land                                                                                           1,639,303              1,639,303
    Building                                                                                       5,042,590              4,986,714
    Equipment                                                                                      6,678,641              5,984,287
    Furniture                                                                                      1,995,763              1,974,332
                                                                                                ------------           ------------
                                                                                                  15,356,297             14,584,636
    Less accumulated depreciation                                                                  6,743,639              5,941,568
                                                                                                ------------           ------------
                      Property, plant and equipment, net                                           8,612,658              8,643,068
Investments                                                                                        5,867,693              5,347,377
Other assets                                                                                         307,041                245,347
                                                                                                ------------           ------------
                                                                                                $ 80,688,451           $ 44,594,329
                                                                                                ============           ============
                          Liabilities and Stockholders' Equity
                          ------------------------------------
Current liabilities:
    Accounts payable                                                                            $ 19,825,749           $  2,224,460
    Accrued expenses:
       Warranty                                                                                    1,334,786              1,877,731
       Income taxes                                                                                2,391,402              1,405,010
       Payroll and related expenses                                                                2,460,907                835,789
       Royalties                                                                                     149,052                177,019
       Property taxes                                                                                330,152                364,361
       Access Products termination charge                                                            263,726                288,613
    Deferred revenue                                                                               3,941,057                333,682
                                                                                                ------------           ------------
                      Total current liabilities                                                   30,696,831              7,506,665
                                                                                                ------------           ------------
Stockholders' equity:
    Common stock, $.01 par value; authorized 30,000,000 shares; issued and outstanding
       15,808,479 shares in 2000 and 15,371,932 shares in 1999                                       158,085                153,719
    Additional paid-in capital                                                                    10,081,936              6,801,476
    Note receivable for common stock                                                                (600,000)                    --
    Retained earnings                                                                             40,297,751             30,152,749
    Accumulated other comprehensive income (loss) - net                                               53,848                (20,280)
                                                                                                ------------           ------------
                      Total stockholders' equity                                                  49,991,620             37,087,664
                                                                                                ------------           ------------
                                                                                                $ 80,688,451           $ 44,594,329
                                                                                                ============           ============
</TABLE>

See accompanying notes to consolidated financial statements.




                                      F-2
<PAGE>


                            APPLIED INNOVATION INC.


                     Consolidated Statements of Operations



<TABLE>
<CAPTION>
                                                                                           Years Ended December 31,
                                                                                           ------------------------
                                                                               2000                   1999                  1998
                                                                               ----                   ----                  ----
<S>                                                                       <C>                     <C>                    <C>
Net sales                                                                 $ 116,103,392           $ 49,523,619           $53,627,516
Cost of sales                                                                75,906,065             20,917,459            22,236,650
                                                                          -------------           ------------           -----------
      Gross profit                                                           40,197,327             28,606,160            31,390,866
                                                                          -------------           ------------           -----------

Operating expenses:
Selling, general and administrative                                          18,455,315             11,965,059            14,428,447
Research and development                                                      8,176,622              7,479,496            11,979,875
Non-recurring charge                                                                 --                     --             3,800,000
                                                                          -------------           ------------           -----------
      Total operating expenses                                               26,631,937             19,444,555            30,208,322
                                                                          -------------           ------------           -----------
      Income from operations                                                 13,565,390              9,161,605             1,182,544
                                                                          -------------           ------------           -----------

Other income (expense):
      Interest income                                                         1,374,546                992,665               614,705
      Other income (expense)                                                     (3,854)                    --             1,049,100
      Gain (loss) on disposal of assets                                         (17,080)               (68,189)                1,303
                                                                          -------------           ------------           -----------
      Total other income, net                                                 1,353,612                924,476             1,665,108
                                                                          -------------           ------------           -----------
      Income before income taxes                                             14,919,002             10,086,081             2,847,652
Income taxes                                                                  4,774,000              3,081,000               538,000
                                                                          -------------           ------------           -----------
      Net income                                                          $  10,145,002           $  7,005,081           $ 2,309,652
                                                                          =============           ============           ===========
Earnings per share:
      Basic earnings per share                                            $         .65           $        .45           $       .15
                                                                          =============           ============           ===========
      Diluted earnings per share                                          $         .63           $        .45           $       .14
                                                                          =============           ============           ===========
      Weighted average shares outstanding for basic earnings per
        share                                                                15,598,723             15,598,143            15,804,608
                                                                          =============           ============           ===========
      Weighted average shares outstanding for diluted earnings
        per share                                                            16,014,153             15,647,050            15,962,846
                                                                          =============           ============           ===========
</TABLE>

See accompanying notes to consolidated financial statements.




                                      F-3

<PAGE>


                            APPLIED INNOVATION INC.


                Consolidated Statements of Stockholders' Equity





<TABLE>
<CAPTION>
                                       Common stock
                                       ------------
                                                                                                         Accumulated
                                   Number                    Additional   Note receivable               other compre-
                                 of shares                    paid-in       for common       Retained    hensive gain
                                outstanding      Amount       capital          stock         earnings    (loss), net       Totals
                                -----------      ------       -------          -----         --------    -----------       ------
<S>                              <C>            <C>          <C>             <C>           <C>             <C>          <C>
Balance-December 31, 1997        15,790,832     $157,908     $ 8,407,058     $      --     $20,838,016     $     --     $29,402,982
Stock options exercised              29,100          291          49,982            --              --           --          50,273
Tax benefit associated with
    exercise of stock options            --           --           8,079            --              --           --           8,079
Common stock repurchased            (33,800)        (338)       (127,965)           --                                     (128,303)
Net income                                                                                   2,309,652           --       2,309,652
                                 ----------     --------     -----------     ---------     -----------     --------     -----------
Balance-December 31, 1998        15,786,132      157,861       8,337,154            --      23,147,668           --      31,642,683
Comprehensive income:
Net income                               --           --              --            --       7,005,081           --       7,005,081
Unrealized loss on
      investments, net                   --           --              --            --              --      (20,280)        (20,280)
                                                                                                                        -----------
Total comprehensive income                                                                                                6,984,801
Common stock repurchased           (414,200)      (4,142)     (1,535,678)           --              --           --      (1,539,820)
                                 ----------     --------     -----------     ---------     -----------     --------     -----------
Balance-December 31, 1999        15,371,932      153,719       6,801,476            --      30,152,749      (20,280)     37,087,664
Stock options exercised             336,547        3,366       1,670,573            --              --           --       1,673,939
Tax benefit associated with
    exercise of stock options            --           --         410,887            --              --           --         410,887
Sale of stock to officer            100,000        1,000       1,199,000      (600,000)             --           --         600,000
Comprehensive income:
     Net income                          --           --              --            --      10,145,002           --      10,145,002
     Unrealized gain on
     investments, net                    --           --              --            --              --       74,128          74,128
                                                                                                                        -----------
Total comprehensive income                                                                                               10,219,130
                                 ----------     --------     -----------     ---------     -----------     --------     -----------
Balance-December 31, 2000        15,808,479     $158,085     $10,081,936     $(600,000)    $40,297,751     $ 53,848     $49,991,620
                                 ==========     ========     ===========     =========     ===========     ========     ===========
</TABLE>




See accompanying notes to consolidated financial statements.




                                      F-4
<PAGE>


                            APPLIED INNOVATION INC.

                     Consolidated Statements of Cash Flows



<TABLE>
<CAPTION>
                                                                                          Years Ended December 31,
                                                                                          ------------------------
                                                                               2000                  1999                  1998
                                                                               ----                  ----                  ----
<S>                                                                        <C>                   <C>                   <C>
Cash flows from operating activities:
    Net income                                                             $ 10,145,002          $  7,005,081          $  2,309,652
    Adjustments to reconcile net income to net cash provided by
       operating activities:
           Depreciation                                                       1,633,729             1,883,381             2,658,968
           Provision for doubtful accounts                                      464,548               162,103               147,091
           (Gain) loss on disposal of assets                                     17,080                68,189                (1,303)
           Deferred income tax expense (benefit)                             (1,442,000)               80,000              (477,000)
           Tax benefit associated with exercise of stock options                410,887                    --                 8,079
           Write down of assets related to termination of
                 Access Products development activity                                --                    --             2,322,634
           Effects of changes in operating assets and liabilities:
              Accounts receivable                                           (19,465,222)           (3,453,878)            4,099,351
              Inventory                                                      (8,095,628)             (292,777)             (861,343)
              Other current assets                                             (352,352)             (281,168)                2,439
              Other assets                                                      (30,694)              (26,781)                6,990
              Accounts payable                                               17,601,289             1,172,538            (2,313,893)
              Accrued expenses                                                1,981,502            (2,051,284)            2,369,887
              Deferred revenue                                                3,607,375               322,421               (21,570)
                                                                           ------------          ------------          ------------
                      Net cash provided by operating activities               6,475,516             4,587,825            10,249,982
                                                                           ------------          ------------          ------------

Cash flows from investing activities:
    Purchases of property, plant and equipment                               (1,626,559)           (1,193,200)           (1,216,487)
    Purchases of investments                                                 (8,885,238)          (32,071,575)                   --
    Maturities of investments                                                 3,171,770            11,478,082                    --
    Sale of investments                                                         675,624            13,431,255                    --
    Proceeds from sale of property, plant and equipment                           6,160                24,802                60,878
                                                                           ------------          ------------          ------------
                      Net cash (used in) investing activities                (6,658,243)           (8,330,636)           (1,155,609)
                                                                           ------------          ------------          ------------

Cash flows from financing activities:
    Common stock repurchased                                                         --            (1,539,820)             (128,303)
    Proceeds from issuance of common stock                                    2,273,939                    --                50,273
                                                                           ------------          ------------          ------------
                      Net cash provided by (used in) financing
                          activities                                          2,273,939            (1,539,820)              (78,030)
                                                                           ------------          ------------          ------------

Increase (decrease) in cash and cash equivalents                              2,091,212            (5,282,631)            9,016,343
Cash and cash equivalents-beginning of year                                  11,928,868            17,211,499             8,195,156
                                                                           ------------          ------------          ------------
Cash and cash equivalents-end of year                                      $ 14,020,080          $ 11,928,868          $ 17,211,499
                                                                           ============          ============          ============

SUPPLEMENTAL CASH FLOW DISCLOSURE:
    Income taxes paid                                                      $  4,818,722          $  3,846,544          $      1,232
                                                                           ============          ============          ============
</TABLE>


See accompanying notes to consolidated financial statements.




                                      F-5
<PAGE>


                            APPLIED INNOVATION INC.
                   Notes to Consolidated Financial Statements

                           December 31, 2000 and 1999



   (1)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

        The following accounting principles and practices of Applied Innovation
            Inc. and subsidiary (the Company) are set forth to facilitate the
            understanding of data presented in the consolidated financial
            statements:

              DESCRIPTION OF BUSINESS ACTIVITY

              The Company is a leading provider of network solutions for
                  telecommunications service providers. The Dublin, Ohio, based
                  company designs and manufactures products for network
                  management, protocol conversion, mediation and data
                  communication between network elements and operations support
                  systems. The Company's products enable operations systems to
                  manage all the elements in multivendor, multiprotocol
                  telecommunications networks. The majority of the Company's
                  customers are regional bell operating companies, long distance
                  phone companies and competitive access providers.

              PRINCIPLES OF CONSOLIDATION

              The consolidated financial statements include the accounts of
                  Applied Innovation Inc. and its wholly owned subsidiary. All
                  significant intercompany balances and transactions have been
                  eliminated in consolidation. Certain reclassifications have
                  been made to December 31, 1999 balances to conform to current
                  year presentation.

              CASH EQUIVALENTS

              Cash equivalents represent short-term investments with original
                  maturities of three months or less. At December 31, 2000 and
                  1999, cash equivalents of $12,242,463 and $10,080,063,
                  respectively, were invested in corporate notes and commercial
                  paper and taxable and tax exempt bonds with original
                  maturities of three months or less.

              INVESTMENTS

              Since the Company does not intend to hold its investments in debt
                  and equity securities until maturity and does not actively
                  trade the securities to maximize trading gains, the Company
                  classifies these securities as "available-for-sale" and,
                  accordingly, reports such securities at fair value plus
                  accrued interest. The fair value of debt securities is
                  determined from public quotations for such securities as of
                  the reporting date. Any temporary excess (deficiency) of fair
                  value over (under) the underlying cost of the investment, net
                  of taxes, is excluded from current period earnings and is
                  reported as unrealized gains (losses) as a separate component
                  of stockholders' equity.

              REVENUE RECOGNITION


              Product Sales: The Company recognizes product sales revenue when
                  products are shipped. Alternatively, in certain circumstances,
                  a customer's order may direct us to build products and prepare
                  them for shipment, but hold such products temporarily on the
                  customer's behalf. In such situations, revenue is recognized
                  when all other terms and obligations of the sale are met,
                  including the transfer of title and risk of loss.




                                      F-6
<PAGE>


              Software License Sales: Revenue is derived from the sale of
                  internally produced software as well as maintenance and
                  support agreements from software sales. The Company licenses
                  software and provides support services including training,
                  maintenance and installation and consulting. License fee
                  revenues are generally recognized when the software product is
                  shipped and the portion of the fees related to supporting
                  services is recognized as the services are performed.

              Services: Field service projects are generally short-term in
                  nature and are accepted by the customer and billed by the
                  Company on a project-by-project basis. The Company recognizes
                  field service revenue at the completion of the project.
                  Revenues from maintenance agreements are billed periodically,
                  deferred and recognized straight-line over the term of the
                  agreements.


              INVENTORY

              Inventory is stated at the lower of cost or market. Cost is
                  computed using standard cost, which approximates actual cost
                  on a first-in, first-out basis.

              PROPERTY, PLANT AND EQUIPMENT

              Property, plant and equipment are recorded at cost. Depreciation
                  is provided on the straight-line method over the estimated
                  useful lives as follows:

                                                                Lives (in years)
                                                                ----------------
                           Building                                    40
                           Equipment                                   3-5
                           Furniture                                    7


              WARRANTY

              The Company warrants its products for a minimum of one year after
                  sale and up to five years as negotiated under contract.
                  Accordingly, the Company accrues the estimated costs of such
                  warranties.

              INCOME TAXES

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

              STOCK OPTION PLANS

              The Company applies the intrinsic value-based method of accounting
                  prescribed by Accounting Principles Board ("APB") Opinion No.
                  25, "Accounting for Stock Issued to Employees", and related
                  interpretations, in accounting for its fixed plan stock
                  options. As such, compensation expense would be recorded on
                  the date of grant only if the current market price of the
                  underlying stock exceeded the exercise price. Statement of
                  Financial Accounting Standards ("SFAS") No. 123, "Accounting
                  for Stock-Based Compensation", established accounting and
                  disclosure requirements using a fair value-based method of
                  accounting for stock-based employee



                                      F-7
<PAGE>


                  compensation plans. As allowed by SFAS No. 123, the Company
                  elected to continue to apply intrinsic value-based method of
                  accounting described above, and has adopted the disclosure
                  requirements of SFAS 123.

              RESEARCH AND DEVELOPMENT

              Research and development costs are expensed when incurred.

              GENERAL CREDIT RISK

              The Company grants credit on open account to its customers,
                  substantially all of whom are in the telecommunications
                  industry. To date, the Company has not provided extended
                  payment terms under any type of vendor financing agreements.

              USE OF ESTIMATES

              The preparation of financial statements in conformity with
                  generally accepted accounting principles requires management
                  to make estimates and assumptions that affect the reported
                  amounts of assets and liabilities and disclosure of contingent
                  assets and liabilities at the date of the financial statements
                  and the reported amounts of revenue and expenses during the
                  reporting period. Estimates are used for, but not limited to,
                  the accounting for doubtful accounts, inventory obsolescence,
                  depreciation, sales returns, warranty costs, taxes, and
                  contingencies. Actual results could differ from these
                  estimates.

   (2)  INVENTORY

        Major classes of inventory at December 31, 2000 and 1999 are
            summarized below:

                                                   2000                1999
                                                   ----                ----
             Raw materials                     $  8,201,638         $ 2,739,379
             Work-in-process                      2,431,166             142,030
             Finished goods                       1,566,256           1,192,023
                                               ------------         -----------
                                                 12,199,060           4,073,432
             Reserve for obsolescence              (190,000)           (160,000)
                                               ------------         -----------
                                               $ 12,009,060         $ 3,913,432
                                               ============         ===========

   (3)  INVESTMENTS

        The fair values of all financial instruments, excluding investments,
            approximate carrying values because of the short maturities of those
            instruments.






                                      F-8
<PAGE>


        The following summarizes the Company's investments in securities.


<TABLE>
<CAPTION>
                                                                         Gross             Gross
                  December 31, 2000                 Amortized          Unrealized        Unrealized              Fair
                  -----------------                   Cost               Gains             Losses                Value
                                                   -----------          --------          --------           -----------
              <S>                                  <C>                  <C>               <C>                <C>
              U.S. agency obligations              $ 5,506,171          $ 51,697          $(17,836)          $ 5,540,032
              U.S. government obligations              202,401             5,437            (2,469)              205,369
              Corporate obligations                  6,466,168            48,220            (5,860)            6,508,528
                                                   -----------          --------          --------           -----------
              Total                                $12,174,740          $105,354          $(26,165)          $12,253,929
                                                   ===========          ========          ========           ===========

              Reported as:
              Short-term investments                                                                         $ 6,386,236
              Investments                                                                                      5,867,693
                                                                                                             -----------
              Total                                                                                          $12,253,929
                                                                                                             ===========
</TABLE>

<TABLE>
<CAPTION>
                                                                         Gross             Gross
                  December 31, 1999                 Amortized          Unrealized        Unrealized              Fair
                  -----------------                   Cost               Gains             Losses                Value
                                                   -----------          --------          --------           -----------
              <S>                                  <C>                  <C>               <C>                <C>
              U.S. agency obligations              $ 1,935,335          $     50          $(45,703)          $ 1,889,682
              U.S. government obligations              277,064                --            (5,966)              271,098
              Corporate obligations                  4,958,951            44,923           (22,696)            4,981,178
                                                   -----------          --------          --------           -----------
              Total                                $ 7,171,350          $ 44,973          $(74,365)          $ 7,141,958
                                                   ===========          ========          ========           ===========

              Reported as:
              Short-term investments                                                                         $ 1,794,581
              Investments                                                                                      5,347,377
                                                                                                             -----------
              Total                                                                                          $ 7,141,958
                                                                                                             ===========
</TABLE>

        Gross realized gains included in income in 2000, 1999, and 1998 were
            $13,237, $375, and $19,123 respectively, and gross realized losses
            included in income in 2000, 1999, and 1998 were $9,179 and $1,174
            and $429, respectively. Realized gains and losses are determined by
            specific identification.

        The Company's December 31, 2000 debt securities at fair market value
            mature as follows: $6,386,236 in less than one year, $5,713,502
            after one year but less than five years, and $154,191 in five or
            more years.






                                      F-9
<PAGE>


   (4)  EARNINGS PER SHARE

        The calculations of earnings per share for the years ended December 31,
            2000, 1999, and 1998 are based upon the weighted average shares
            outstanding during the periods and, when applicable, those stock
            options that are dilutive, using the treasury stock method.
            Reconciliations of the numerators and denominators of the basic and
            diluted earnings per share calculations follow:


<TABLE>
<CAPTION>
                                                                                  Year ended December 31, 2000
                                                                        ------------------------------------------------
                                                                          Income               Shares          Per share
                                                                        (numerator)        (denominator)        amount
                                                                        -----------        -------------        ------
             <S>                                                        <C>                  <C>                 <C>
             Basic  earnings per share-
                   Net income available to common stockholders          $10,145,002          15,598,723          $.65
                                                                                                                 ====
             Effect of dilutive securities-
                 Stock options                                                   --             415,430
                                                                        -----------          ----------
             Diluted earnings per share
                 Net income available to common stockholders
                      including assumed conversions                     $10,145,002          16,014,153          $.63
                                                                        ===========          ==========          ====
</TABLE>

<TABLE>
<CAPTION>
                                                                                  Year ended December 31, 1999
                                                                        ------------------------------------------------
                                                                          Income               Shares          Per share
                                                                        (numerator)        (denominator)        amount
                                                                        -----------        -------------        ------
             <S>                                                        <C>                  <C>                 <C>
             Basic  earnings per share-
                   Net income available to common stockholders          $ 7,005,081          15,598,143          $.45
                                                                                                                 ====
             Effect of dilutive securities-
                 Stock options                                                   --              48,907
                                                                        -----------          ----------
             Diluted earnings per share
                 Net income available to common stockholders
                      including assumed conversions                     $ 7,005,081          15,647,050          $.45
                                                                        ===========          ==========          ====
</TABLE>

<TABLE>
<CAPTION>
                                                                                  Year ended December 31, 1998
                                                                        ------------------------------------------------
                                                                          Income               Shares          Per share
                                                                        (numerator)        (denominator)        amount
                                                                        -----------        -------------        ------
             <S>                                                        <C>                  <C>                 <C>
             Basic earnings per share-
                 Net income available to common stockholders            $ 2,309,652          15,804,608          $.15
                                                                                                                 ====
             Effect of dilutive securities-
                 Stock options                                                   --             158,238
                                                                        -----------          ----------
             Diluted earnings per share-
                 Net income available to common stockholders
                    including assumed conversions                       $ 2,309,652          15,962,846          $.14
                                                                        ===========          ==========          ====
</TABLE>




                                      F-10
<PAGE>


        Stock options which are out-of-the-money and, therefore not dilutive
            under the treasury stock method, have been excluded from the above
            earnings per share calculations. These options were 417,750,
            205,750, and 211,750 in 2000, 1999, and 1998 respectively.



   (5)  MAJOR CUSTOMERS AND GEOGRAPHIC DATA

        Revenues to major customers represented 61%, 42%, and 75% of net sales
            for 2000, 1999, and 1998, respectively. The number of major
            customers previously referred to were two, two, and five for 2000,
            1999, and 1998, respectively, with trade accounts receivable
            balances of $19,399,813 and $3,173,344 at December 31, 2000 and
            1999, respectively.




        The Company's sales by geographic areas were as follows:

                                2000            1999             1998
                             ----------      ----------       ----------

        United States     $ 114,883,000    $ 48,545,000     $ 52,795,000

        International         1,220,000         979,000          833,000
                          -------------    ------------     ------------
                          $ 116,103,000    $ 49,524,000     $ 53,628,000
                          =============    ============     ============


   (6)  STOCK OPTION PLANS

        The Company's 1996 Stock Option Plan (the 1996 Plan) was adopted by the
            Board of Directors on February 1, 1996 and approved by the
            stockholders of the Company as of April 25, 1996, with 1,000,000
            shares of common stock reserved for issuance under the 1996 Plan.
            The 1996 Plan was amended by the Board of Directors and approved by
            the stockholders of the Company on April 23, 1998 to increase the
            shares available for issuance under the 1996 Plan from 1,000,000 to
            2,000,000. Options granted under the 1996 Plan may be either
            incentive stock options or nonstatutory stock options, with maximum
            terms of ten years. The exercise price of each incentive stock
            option must be at least 100% of the fair market value per share of
            the Company's common stock as determined by the Stock Option and
            Compensation Committee on the date of grant.

        Previously, the Company had adopted the 1986 Incentive Stock Option Plan
            and the 1986 Non-statutory Stock Option Plan (the 1986 Plans).
            Options granted under the 1986 Plans have maximum terms of ten
            years. The exercise price of each incentive stock option must be at
            least 100% of the fair market value per share of the Company's
            common stock as determined by the Stock Option and Compensation
            Committee on the date of grant.

        Tax benefits realized by the Company for deductions in excess of
            compensation expense under these plans are credited to additional
            paid-in capital.

        At  December 31, 2000, there were 151,540 additional shares available
            for grant under the 1996 Plan. The per share weighted-average fair
            value of stock options granted during 2000, 1999, and 1998 was
            $6.41, $2.36, and $4.15, respectively, on the date of grant using
            the Black Scholes option-pricing model with the following
            weighted-average assumptions used for grants in the years ended
            December 31, 2000, 1999, and 1998, respectively: dividend yield of
            0% for all years; expected volatility of 77%, 71%, and 71%;
            risk-free interest rate of 6% for all years; and expected life of
            4.2, 4.5, and 4.2 years.

        The Company applies APB Opinion No. 25 in accounting for its plans and,
            accordingly, no compensation cost has been recognized for its stock
            options in the financial statements. Had the Company determined
            compensation cost based on the fair value at the grant date for its
            stock options under SFAS No. 123, including the impact of the
            options repriced in 1997, the Company's net income (loss) and
            earnings (loss) per share, net of related income tax effects, would
            have been reduced to the pro forma amounts indicated below:







                                      F-11

<PAGE>


<TABLE>
<CAPTION>
                                                                          2000        1999         1998
                                                                          ----        ----         ----
                <S>                                   <C>             <C>          <C>          <C>
                Net income (loss)                     As reported     $10,145,002  $7,005,081   $2,309,652
                                                      Pro forma         8,848,465   6,519,016    1,877,467

                Basic earnings (loss) per share       As reported     $    .65     $   .45      $   .15
                                                      Pro forma            .57         .42          .12

                Diluted earnings (loss) per share     As reported     $    .63     $   .45      $   .14
                                                      Pro forma            .55         .42          .12
</TABLE>



        A summary of stock option activity follows:

<TABLE>
<CAPTION>
                                                    Number of      Weighted-average
                                                      shares        exercise price
                                                      ------        --------------
             <S>                                    <C>            <C>
             Balance at December 31, 1997           1,034,250           $ 4.96
                 Granted                              349,250             6.87
                 Exercised                            (29,100)            1.73
                 Canceled/expired                    (409,750)            5.73
                                                    ---------


             Balance at December 31, 1998             944,650             5.43
                 Granted                              515,000             3.68
                 Exercised                                 --               --
                 Canceled/expired                    (354,350)            4.78
                                                    ---------

             Balance at December 31, 1999           1,105,300             4.82
                 Granted                            1,117,450            13.21
                 Exercised                           (336,547)            4.97
                 Canceled/expired                    (109,223)            6.25
                                                    ---------
             Balance at December 31, 2000           1,776,980             8.66
                                                    =========
</TABLE>




                                      F-12

<PAGE>


The following table summarizes information about options outstanding at December
31, 2000:

<TABLE>
<CAPTION>
                                               Options outstanding                      Options exercisable
                                    -------------------------------------------       ------------------------
                                                    Weighted-
                                                     average          Weighted-                      Weighted-
                                                    remaining          average                        average
                 Range of           Number of      contractual        exercise        Number of      exercise
             exercise prices         shares           life              price          shares         price
             ---------------        ---------      -----------        --------        ---------      ---------
             <S>                    <C>              <C>               <C>             <C>            <C>
             $  3.44 -  4.81          309,650           5.2            $ 3.68          126,790        $ 3.57
             $  5.00 -  6.88          332,280           3.9              5.47          222,678          5.32
             $  7.00 -  9.88          444,200           6.4              8.12           69,850          7.88
             $ 10.25 - 12.75          345,600           9.6             12.11           12,240         11.73
             $ 13.00 - 24.00          345,250           9.4             20.34           55,000         14.91
                                    ---------                                          -------
                                    1,776,980           6.9              8.66          486,558          6.48
                                    =========                                          =======
</TABLE>

   (7)  DEFINED CONTRIBUTION PLAN

        The Company sponsors a defined contribution 401(k) and profit sharing
            plan that covers all eligible employees. Since October 1, 1999, the
            Company matched 50% of each participant's contribution, up to 6% on
            that participant's contribution. From April 1, 1998 to October 1,
            1999, the Company matched 35%, and prior to April 1, 1998, the
            Company matched 25%. The Company may also make profit sharing
            contributions at the discretion of the Board of Directors. For 2000,
            1999, and 1998, the profit sharing contribution was $400,000,
            $250,000, and $100,000, respectively, and the total expense related
            to the plan was $762,745, $475,373, and $329,918, respectively.


   (8)  INCOME TAXES

        Income tax expense (benefit) consists of:

<TABLE>
<CAPTION>
                                                     Current               Deferred               Total
                                                     -------               --------               -----
             <S>                                    <C>                   <C>                   <C>
             Year ended December 31, 2000:
                 Federal                            $ 5,440,000           $(1,273,000)          $4,167,000
                 State and local                        776,000              (169,000)             607,000
                                                    -----------           -----------           ----------
                                                    $ 6,216,000           $(1,442,000)          $4,774,000
                                                    ===========           ===========           ==========
             Year ended December 31, 1999:
                 Federal                            $ 2,663,000           $    74,000           $2,737,000
                 State and local                        338,000                 6,000              344,000
                                                    -----------           -----------           ----------
                                                    $ 3,001,000           $    80,000           $3,081,000
                                                    ===========           ===========           ==========
             Year ended December 31, 1998:
                 Federal                            $   912,000           $  (438,000)          $  474,000
                 State and local                        103,000               (39,000)              64,000
                                                    -----------           -----------           ----------
                                                    $ 1,015,000           $  (477,000)          $  538,000
                                                    ===========           ===========           ==========
</TABLE>




                                      F-13
<PAGE>


        A reconciliation of income tax expense (benefit) at the expected
            federal statutory rate (34%) to income tax expense (benefit) at the
            Company's effective rates for continuing operations is as follows:

<TABLE>
<CAPTION>
                                                                                 2000                  1999                1998
                                                                                 ----                  ----                ----
                 <S>                                                          <C>                   <C>                   <C>
                 Computed tax at the expected federal statutory rate          $ 5,072,000           $ 3,429,000           $ 968,000
                 State and local income taxes, net of federal income
                    tax effect                                                    350,000               223,000              29,000
                 Change in state rate applied to deferred tax assets              (51,000)                   --                  --
                 Meals and entertainment expenses                                 110,000                37,000              40,000
                 Research and experimentation credit                             (661,000)             (585,000)           (464,000)
                 Tax-exempt interest income                                       (68,000)              (33,000)            (36,000)
                 Other                                                             22,000                10,000               1,000
                                                                              -----------           -----------           ---------
                                                                              $ 4,774,000           $ 3,081,000           $ 538,000
                                                                              ===========           ===========           =========
</TABLE>

        The tax effects of temporary differences that give rise to significant
            portions of the deferred tax assets and deferred tax liabilities at
            December 31, 2000 and 1999 are presented below:

<TABLE>
<CAPTION>
                                                                                                  2000                1999
                                                                                                  ----                ----
                 <S>                                                                           <C>                 <C>
                 Deferred tax assets:
                     Warranty reserve                                                          $  502,000          $  695,000
                     Accounts receivable allowance                                                266,000             117,000
                     Inventory, principally due to obsolescence allowance                         255,000             189,000
                     Access Products termination charge                                           102,000             107,000
                     Deferred revenue                                                           1,517,000             123,000
                     Property, plant and equipment, principally due to differences in
                        depreciation                                                               66,000              35,000
                                                                                               ----------          ----------
                                       Total gross deferred tax assets                         $2,708,000          $1,266,000
                                                                                               ==========          ==========
</TABLE>

        In  assessing the realizability of deferred tax assets, management
            considers whether it is more likely than not that some portion or
            all of the deferred tax assets will not be realized. The ultimate
            realization of deferred tax assets is dependent upon the utilization
            of loss carrybacks or the generation of future taxable income during
            the periods in which those temporary differences become deductible.
            Management considers the scheduled reversal of deferred tax
            liabilities, if any, projected future taxable income, and tax
            planning strategies in making this assessment. Based upon the level
            of historical taxable income and projections for future taxable
            income over the periods which the deferred tax assets are
            deductible, management believes that it is more likely than not the
            Company will realize the benefits of these deductible differences
            and, therefore, no valuation allowance has been provided.



                                      F-14

<PAGE>


   (9)  OTHER INCOME

        In  1998, there was a change in the Company's business relationship with
            a third party regarding compensation to the third party for sales
            efforts related to the Company's products. The change in the
            relationship resulted in both parties agreeing that certain
            obligations due the third party by the Company would not be paid.
            The Company previously expensed and accrued $745,875 in 1997 and
            $303,225 in 1998 related to the sales efforts. As a result of the
            change, the Company reversed the accrued liability and recognized
            other income of $1,049,100 in the fourth quarter of 1998.

  (10)  LEASE COMMITMENTS

        The Company is obligated for office space in Colorado, Georgia,
            Illinois, North Carolina, and Texas under various operating leases,
            which expire over the next three years. The Company's North Carolina
            property is sublet through the term of the lease. Additionally, the
            Company is obligated under an operating lease for equipment which
            expires December 3, 2002.

        Future minimum lease payments and related sublease receipts under the
            operating leases as of December 31, 2000 are:


<TABLE>
<CAPTION>
                                                                                   Lease             Sublease
                                                                                  Payments           Receipts
                 Year ending December 31:                                         --------           --------
                 <S>                                                              <C>               <C>
                   2001                                                           $544,394          $(255,480)
                   2002                                                            263,391            (27,540)
                   2003                                                             37,091                 --
                                                                                  --------          ---------
                 Total minimum lease payments                                     $844,876          $(283,020)
                                                                                  ========          =========
</TABLE>

        Total rent expense in 2000, 1999, and 1998 was $156,746, $92,222, and
             $349,889, respectively. Costs associated with the Company's North
             Carolina lease were accrued in 1998 as a component of the
             non-recurring charge. Accordingly, such costs have been excluded
             from 1999 and 2000 rent expense.

  (11)  EQUITY

On July 20, 2000, the Company elected Robert L. Smialek as President and Chief
Executive Officer. As part of his Employment Agreement ("Agreement"), the
Company sold Mr. Smialek 100,000 unregistered shares of its common stock at $12
per share, the closing market price on the date of the Agreement. Mr. Smialek
paid for the stock with $600,000 of cash, and a $600,000 five year note, bearing
interest at 6.62%, payable in five equal annual installments of principal and
interest commencing July 13, 2001. The note receivable is reflected in the
Stockholders' Equity section of the accompanying balance sheet.

The Company had a 1,000,000 share stock repurchase program which expired October
31, 2000. The Company did not repurchase any shares during 2000 under this plan.
As of December 31, 2000, 448,000 shares were purchased under the plan at an
average price of $3.72 per share.




                                      F-15
<PAGE>


(12)     NON-RECURRING CHARGE

        In September of 1998, the Company terminated all product development
            and related activities of its Access Products Group due to an
            unsuccessful search for a strategic partner. The termination
            resulted in a one-time non-recurring charge of $3.8 million which
            was recorded in the third quarter of 1998. This charge accounted for
            all costs associated with the termination of the Access Products
            Group, including the closing of the Raleigh, North Carolina
            facility. The charge resulted in $1.1 million of severance related
            costs, a charge of $2.2 million to write down specific assets and
            $.5 million related to occupancy and other associated termination
            costs.

(13)     QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

        A summary of quarterly financial information follows (in thousands,
            except per share amounts):

<TABLE>
<CAPTION>
              2000                                    Q1               Q2               Q3               Q4
                                                    -------          -------          -------          -------
              <S>                                   <C>              <C>              <C>              <C>
              Net sales                             $14,363          $18,284          $31,160          $52,296
              Gross profit                            7,536            9,578           11,047           12,036
              Income before income taxes              2,283            3,364            4,117            5,155
              Net income                              1,552            2,288            2,799            3,506
              Diluted net income per share          $   .10          $   .15          $   .17          $   .22
</TABLE>

<TABLE>
<CAPTION>
              1999                                    Q1               Q2               Q3               Q4
                                                    -------          -------          -------          -------
              <S>                                   <C>              <C>              <C>              <C>
              Net sales                             $10,854          $12,523          $11,779          $14,368
              Gross profit                            6,589            7,178            7,060            7,780
              Income before income taxes              1,979            2,629            2,359            3,119
              Net income                              1,267            1,682            1,510            2,547
              Diluted net income per share          $   .08          $   .11          $   .10          $   .16
</TABLE>





                                      F-16