CORSAIR COMMUNICATIONS INC
8-K/A, 1998-08-13
COMPUTER INTEGRATED SYSTEMS DESIGN
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


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

                                   FORM 8-K/A
                        AMENDMENT NO. 1 TO CURRENT REPORT

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



Date of Report (Date of earliest event reported)  JUNE 22, 1998
                                                -----------------


                          CORSAIR COMMUNICATIONS, INC.
- --------------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)



<TABLE>
<S>                                                <C>                           <C>
                  DELAWARE                                  0-25356                        77-0390406 
- -----------------------------------------------------------------------------------------------------------------
(State or other jurisdiction of incorporation)     (Commission File Number)     (IRS Employer Identification No.)
</TABLE>





3408 HILLVIEW AVENUE,  PALO ALTO, CALIFORNIA                        94304
- --------------------------------------------------------------------------------
  (Address of principal executive offices)                        (Zip Code)





Registrant's telephone number, including area code        (650) 842-3300
                                                   -----------------------------



                                 NOT APPLICABLE
- --------------------------------------------------------------------------------
         (Former name or former address, if changed since last report.)

<PAGE>   2

                                 AMENDMENT NO. 1


               Corsair Communications, Inc. ("Corsair") hereby amends the
following items to its Current Report on Form 8-K, originally filed with the
Securities and Exchange Commission on July 7, 1998, respectively, as set forth
in the pages attached hereto:

Item 7.        FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
               EXHIBITS: The following financial statements and pro forma
               financial information are filed as a part of this report.

               (a)  Financial Statements of Business Acquired. Subscriber
                    Computing, Inc.

                    (1)  January 7, 1998 Report of Independent Accountants
                         (Deloitte & Touche LLP);

                    (2)  Balance Sheets as of September 30, 1997 and 1996;

                    (3)  Statement of Operations for the years ended September
                         30, 1997, 1996 and 1995;

                    (4)  Statements of Stockholder's Equity (Deficit) for the
                         years ended September 30, 1997, 1996 and 1995;

                    (5)  Statements of Cash Flows for the years ended September
                         30, 1997, 1996 and 1995; and

                    (6)  Notes to Financial Statements for the years ended
                         September 30, 1997, 1996 and 1995.

               (b)  Pro Forma Financial Information. Corsair Communications,
                    Inc. (on a consolidated basis) and Subscriber Computing,
                    Inc.

                    (1)  Pro Forma Combined Condensed Balance Sheet as of March
                         31, 1998 (unaudited).

                    (2)  Pro Forma Combined Condensed Statement of Operations
                         for the three months ended March 31, 1998 (unaudited);

                    (3)  Pro Forma Combined Condensed Statement of Operations
                         for the years ended December 31, 1997, 1996 and 1995
                         (unaudited);

                    (4)  Notes to Pro Forma Combined Condensed Financial
                         Information (unaudited)

               (c)  Exhibits. The following documents are filed as exhibits to
                    this report:

<PAGE>   3

                    (1)  Exhibit 7(a)(99.1) - Financial Statements of Business
                         Acquired, Subscriber Computing, Inc.

                         A.  January 7, 1998 Report of Independent Accountants
                             (Deloitte & Touche LLP);

                         B.  Balance Sheet as of September 30, 1997 and 1996;

                         C.  Statement of Operations for years ended September
                             30, 1997, 1996 and 1995;

                         D.  Statement of Stockholder's equity for the years
                             ended September 30, 1997, 1996 and 1995;

                         E.  Statement of Cash Flows for the years ended
                             September 30, 1997; 1996 and 1995;

                         F.  Notes to Financial Statements for the years ended
                             September 30, 1997, 1996 and 1995.

                    (2)  Exhibit 7(b)(99.2) - Pro Forma Financial Information,
                         Corsair Communications, Inc. (on a consolidated basis)
                         and Subscriber Computing, Inc.

                         A.  Pro forma Combined Condensed Balance Sheet as of
                             March 31, 1998 (unaudited);

                         B.  Pro forma Combined Condensed Statement of
                             Operations for the three months ended March 31,
                             1998 (unaudited);

                         C.  Pro Forma Combined Condensed Statement of
                             Operations for years ended December 31, 1997, 1996
                             and 1995 (unaudited);

                         D.  Notes to Pro Forma Combined Condensed Financial
                             Information. (unaudited).

<PAGE>   4

                                   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.


                                    Corsair Communications, Inc.
                                    --------------------------------------
                                    (Registrant)

Date:  August 13, 1998              By:  /s/ Mary Ann Byrnes
                                       -----------------------------------

                                    Name: Mary Ann Byrnes

                                    Title: President and Chief Executive Officer

<PAGE>   5

                                  EXHIBIT INDEX


Item 7.        FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND 
               EXHIBITS


<TABLE>
<CAPTION>
Document
- --------
<S>                      <C>
Exhibit 99.1             Financial Statements of Business Acquired

                         (1) January 7, 1998 Report of Independent Accountants
                             (Deloitte & Touche LLP)

                         (2) Balance Sheets for the fiscal year ended September
                             30, 1997 and 1996

                         (3) Statement of Operations for the years ended
                             September 30, 1997, 1996 and 1995

                         (4) Statement of Stockholder's Equity (Deficit) for the
                             years ended September 30, 1997, 1996 and 1995

                         (5) Statement of Cash Flows for the years ended
                             September 30, 1997, 1996 and 1995

                         (6) Notes to Financial Statement for the years ended
                             September 30, 1997, 1996 and 1995

Exhibit 99.2             Pro Forma Financial Information  Corsair Communications,
                         Inc. (on a consolidated basis) and Subscriber Computing,
                         Inc.

                         (1) Introduction to Combined Condensed Financial
                             Statements

                         (2) Pro Forma Combined Condensed Balance Sheet as of
                             March 31, 1997 (unaudited)

                         (3) Pro Forma Combined Condensed Statement of
                             Operations for the three months ended March 31,
                             1998 (unaudited)

                         (4) Pro Forma Combined Condensed Statement of
                             Operations for the years ended December 31, 1997,
                             1996 and 1995

                         (5) Notes to Pro Forma Financial Information
                             (unaudited)
</TABLE>





<PAGE>   1
                                                                    EXHIBIT 99.1

                           SUBSCRIBER COMPUTING, INC.
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
Subscriber Computing, Inc.
Irvine, California
 
     We have audited the accompanying balance sheets of Subscriber Computing,
Inc. (the Company) as of September 30, 1997 and 1996, and the related statements
of operations, stockholders' equity (deficit) and cash flows for each of the
three years in the period ended September 30, 1997. 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 Subscriber Computing, Inc.
as of September 30, 1997 and 1996, and the results of its operations and its
cash flows for each of the three years in the period ended September 30, 1997 in
conformity with generally accepted accounting principles.
 
                                          DELOITTE & TOUCHE LLP
 
Costa Mesa, California
January 7, 1998
 
                                       1
<PAGE>   2
 
                           SUBSCRIBER COMPUTING, INC.
 
                                 BALANCE SHEETS
                       AS OF SEPTEMBER 30, 1997 AND 1996
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                  1997           1996
                                                              ------------    -----------
<S>                                                           <C>             <C>
CURRENT ASSETS:
Cash and cash equivalents (Note 1)..........................  $  1,312,868    $ 1,776,928
Investments (Note 1)........................................     1,350,000             --
Restricted cash (Notes 1, 4 and 6)..........................     1,411,801        800,000
Accounts receivable, net of allowance for doubtful accounts
  of $387,875 (1997) and $463,000 (1996) (Note 7)...........     2,437,661      2,464,027
Current portion of long-term installments receivable (Note
  1)........................................................            --        219,760
Prepaid expenses and other current assets...................       271,664         72,328
Officer advances (Note 7)...................................        49,953         49,953
                                                              ------------    -----------
          Total current assets..............................     6,833,947      5,382,996
LONG-TERM INSTALLMENTS RECEIVABLE (Note 1)..................                      154,880
PROPERTY AND EQUIPMENT, net (Notes 2 and 5).................     3,738,483      1,212,356
OTHER ASSETS:
Software license fees, net (Note 1).........................       637,500             --
Goodwill, net (Note 1)......................................       195,529             --
Other.......................................................       215,434         64,275
                                                              ------------    -----------
          Total other assets................................     1,048,463         64,275
                                                              ------------    -----------
                                                              $ 11,620,893    $ 6,814,507
                                                              ============    ===========
                     LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
CURRENT LIABILITIES:
Accounts payable (Note 7)...................................  $  1,289,904    $ 1,224,542
Accrued expenses............................................     1,006,081        799,159
Short-term borrowings (Note 4)..............................     1,160,000      1,000,000
Current portion of obligations under capital leases (Note
  5)........................................................       371,574        146,662
Current portion of notes payable (Note 6)...................     2,858,334      2,008,333
Current portion of deferred revenue.........................     1,699,602      2,094,816
                                                              ------------    -----------
          Total current liabilities.........................     8,385,495      7,273,512
DEFERRED RENT (Note 1)......................................       139,191        120,820
OBLIGATIONS UNDER CAPITAL LEASES, net of current portion
  (Note 5)..................................................       411,733        254,743
NOTES PAYABLE, net of current portion (Note 6)..............       416,666      2,525,000
DEFERRED REVENUE, net of current portion....................            --      1,000,334
                                                              ------------    -----------
          Total long-term liabilities.......................       967,590      3,900,897
COMMITMENTS AND CONTINGENCIES (Notes 5 and 9)
STOCKHOLDERS' EQUITY (DEFICIT) (Notes 7 and 10):
Preferred stock -- Series A convertible -- $.01 par value;
  348,687 shares authorized; none issued and outstanding
Preferred stock -- Series B Senior Convertible
  Participating -- $.01 par value; 4,300,000 shares
  authorized; 4,209,863 shares issued and outstanding.......    14,228,661             --
Common stock -- $.01 par value; 20,000,000 shares
  authorized; 8,386,338 and 7,425,970 shares issued and
  outstanding at September 30, 1997 and 1996,
  respectively..............................................       829,185        349,000
Accumulated deficit.........................................   (12,399,595)    (4,708,902)
Notes receivable from sale of common stock (Note 7).........      (390,443)            --
                                                              ------------    -----------
          Total stockholders' equity (deficit)..............     2,267,808     (4,359,902)
                                                              ------------    -----------
                                                              $ 11,620,893    $ 6,814,507
                                                              ============    ===========
</TABLE>
 
                See notes to accompanying financial statements.

                                       2
<PAGE>   3
 
                           SUBSCRIBER COMPUTING, INC.
 
                            STATEMENTS OF OPERATIONS
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                           1997           1996           1995
                                                        -----------    -----------    ----------
<S>                                                     <C>            <C>            <C>
REVENUES (Notes 1, 11 and 12):
Software license fees.................................  $ 7,466,941    $ 5,396,235    $4,609,210
Services and other revenue............................    5,551,516      6,214,009     2,937,101
                                                        -----------    -----------    ----------
          Total revenues..............................   13,018,457     11,610,244     7,546,311
EXPENSES:
Software production...................................    5,351,258      5,737,915     4,579,871
Selling, general and administrative (Notes 1, 5 and
  7)..................................................    9,488,430      5,080,877     2,724,655
Research and development..............................    5,550,269      3,600,152       327,196
Write-off of capitalized software (Note 1)............           --      3,760,546            --
                                                        -----------    -----------    ----------
          Total expenses..............................   20,389,957     18,179,490     7,631,722
                                                        -----------    -----------    ----------
LOSS FROM OPERATIONS..................................   (7,371,500)    (6,569,246)      (85,411)
                                                        -----------    -----------    ----------
OTHER INCOME (EXPENSE):
Interest expense, net (Notes 4, 5, 6 and 7)...........     (238,228)      (268,146)      (40,867)
Other income (expense), net...........................       54,478         (6,173)        3,625
                                                        -----------    -----------    ----------
          Total other expense, net....................     (183,750)      (274,319)      (37,242)
                                                        -----------    -----------    ----------
LOSS BEFORE PROVISION FOR INCOME TAXES................   (7,555,250)    (6,843,565)     (122,653)
PROVISION FOR INCOME TAXES (Note 3)...................          800            800           800
                                                        -----------    -----------    ----------
NET LOSS..............................................  $(7,556,050)   $(6,844,365)   $ (123,453)
                                                        ===========    ===========    ==========
</TABLE>
 
                See notes to accompanying financial statements.
 
                                       3
<PAGE>   4
 
                           SUBSCRIBER COMPUTING, INC.
 
                  STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                                      NOTES
                                                                                    RECEIVABLE     RETAINED
                                     COMMON STOCK       SERIES B PREFERRED STOCK    FROM SALE      EARNINGS
                                 --------------------   -------------------------   OF COMMON    (ACCUMULATED
                                  SHARES      AMOUNT      SHARES        AMOUNT        STOCK        DEFICIT)       TOTAL
                                 ---------   --------   ----------   ------------   ----------   ------------   ----------
<S>                              <C>         <C>        <C>          <C>            <C>          <C>            <C>
BALANCE, October 1, 1994.......  7,425,970   $349,000          --    $        --    $      --    $  2,258,916   $2,607,916
Net loss.......................         --         --          --             --           --        (123,453)    (123,453)
                                 ---------   --------   ---------    -----------    ---------    ------------   ----------
BALANCE, September 30, 1995....  7,425,970    349,000          --             --           --       2,135,463    2,484,463
Net loss.......................         --         --          --             --           --      (6,844,365)  (6,844,365)
                                 ---------   --------   ---------    -----------    ---------    ------------   ----------
BALANCE, September 30, 1996....  7,425,970    349,000          --             --           --      (4,708,902)  (4,359,902)
Issuance of preferred stock,
  net (Note 10)................         --         --   4,209,863     14,094,018           --              --   14,094,018
Issuance of common stock for an
  acquisition (Note 1).........    210,119    105,060          --             --           --              --      105,060
Issuance of common stock for
  notes receivable (Note 7)....    750,249    375,125          --             --     (375,125)             --           --
Accrued interest on notes
  receivable from sale of
  common stock.................         --         --          --             --      (15,318)             --      (15,318)
Accretion attributable to
  preferred stock..............         --         --          --        134,643           --        (134,643)          --
Net loss.......................         --         --          --             --           --      (7,556,050)  (7,556,050)
                                 ---------   --------   ---------    -----------    ---------    ------------   ----------
BALANCE, September 30, 1997....  8,386,338   $829,185   4,209,863    $14,228,661    $(390,443)   $(12,399,595)  $2,267,808
                                 =========   ========   =========    ===========    =========    ============   ==========
</TABLE>
 
                See notes to accompanying financial statements.
 
                                       4
<PAGE>   5
 
                           SUBSCRIBER COMPUTING, INC.
 
                            STATEMENTS OF CASH FLOWS
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                 1997           1996           1995
                                                              -----------    -----------    -----------
<S>                                                           <C>            <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss....................................................  $(7,556,050)   $(6,844,365)   $  (123,453)
Adjustments to reconcile net loss to net cash used in
  operating activities:
Depreciation and amortization...............................      932,937        376,175        983,516
Loss on disposal of property and equipment..................           --          2,759             --
Write-off of capitalized software development costs.........           --      3,760,546             --
Accrued interest on stockholder notes receivable............      (15,318)            --             --
Changes in operating assets and liabilities, net of effects
  of acquisition:
  Accounts receivable, net..................................       26,366       (516,779)      (500,999)
  Prepaid expenses..........................................       57,146        (38,084)         5,416
  Installments receivable...................................      374,640       (374,640)            --
  Other assets..............................................     (147,513)       (36,851)        (4,077)
  Accounts payable..........................................      (11,082)       655,347           (568)
  Accrued expenses..........................................     (410,404)       257,675        130,082
  Deferred Rent.............................................       18,371        120,820             --
  Deferred revenue..........................................   (1,395,548)    (1,332,053)     3,124,792
                                                              -----------    -----------    -----------
         Net cash (used in) provided by operating
           activities.......................................   (8,126,455)    (3,969,450)     3,614,709
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of property and equipment................           --         18,849             --
Purchase of property and equipment..........................   (2,530,023)      (899,320)      (164,063)
Officer advances............................................           --         (2,400)       (19,953)
Purchase of marketable securities...........................   (2,129,412)            --             --
Proceeds from sale and maturity of marketable securities....      799,412             --             --
Capitalized software development costs......................           --             --     (1,957,025)
                                                              -----------    -----------    -----------
         Net cash used in investing activities..............   (3,880,023)      (882,871)    (2,141,041)
</TABLE>
 
<TABLE>
CASH FLOWS FROM FINANCING ACTIVITIES:
<S>                                                           <C>            <C>            <C>
Net proceeds from short-term bank borrowings................      160,000        596,675        161,325
Proceeds from issuance of long-term debt....................      500,000        500,000      4,650,000
Repayment of obligations under capital leases...............     (341,466)      (116,019)            --
Repayment of long-term debt.................................   (2,258,333)       (91,667)       (71,215)
Net proceeds from issuance of Series B preferred stock......   14,094,018             --             --
                                                              -----------    -----------    -----------
         Net cash provided by financing activities..........   12,154,219        888,989      4,740,110
                                                              -----------    -----------    -----------
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND
  RESTRICTED CASH...........................................      147,741     (3,963,332)     6,213,778
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of
  year......................................................    2,576,928      6,540,260        326,482
                                                              -----------    -----------    -----------
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of year.....  $ 2,724,669    $ 2,576,928    $ 6,540,260
                                                              ===========    ===========    ===========
SUPPLEMENTAL CASH FLOW INFORMATION -- Cash paid during the
  year for:
  Interest..................................................  $   574,835    $   376,601    $    44,204
                                                              ===========    ===========    ===========
  Income taxes..............................................  $       800    $        --    $    18,275
                                                              ===========    ===========    ===========
</TABLE>
 
SUPPLEMENTAL NONCASH INVESTING AND FINANCING ACTIVITIES:
 
    During the year ended September 30, 1995, $500,000 of the Company's
unsecured long-term debt was converted to deferred revenue. Under the terms of
the agreement, the creditor agreed to receive $500,000 in services in lieu of a
$500,000 cash repayment.
 
    During the year ended September 30, 1997 and 1996, the Company financed
$498,385 and $517,424 in equipment through capital lease obligations,
respectively (Note 5).
 
    During the year ended September 30, 1997, $134,643 was accreted towards the
Series B Senior Convertible Participating Preferred Stock liquidation
preference, using the effective interest method.
 
DETAIL OF BUSINESS ACQUIRED IN PURCHASE BUSINESS COMBINATION:
 
    On December 27, 1996, the Company acquired the net assets of Intelligent
Object Solutions, Inc.
 
     A summary of the transaction is as follows:
 
<TABLE>
<S>                                                           <C>
Goodwill....................................................  $   211,382
Fair value of software license fees.........................      750,000
Fair value of other assets acquired.........................      562,431
Common stock issued.........................................     (105,060)
Liabilities assumed.........................................   (1,418,753)
</TABLE>
 
                See notes to accompanying financial statements.
 
                                       5
<PAGE>   6
 
                           SUBSCRIBER COMPUTING, INC.
 
                         NOTES TO FINANCIAL STATEMENTS
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Nature of Operations -- Subscriber Computing, Inc. (the Company) was
incorporated on September 28, 1978. The Company was reincorporated in Delaware
in connection with a financing transaction in December 1996 (Note 10). The
Company is engaged in the design, development and maintenance of computer
software for the wireless telecommunications industry.
 
     Acquisition -- On December 27, 1996, the Company acquired the net assets of
Intelligent Object Solutions, Inc. (IOS), a developer of cellular fraud
prevention software. The Company issued 210,119 shares of common stock, valued
at $105,060, in exchange for the net assets of IOS. The acquisition was recorded
as a purchase and the results of operations for the period from December 27,
1996 to September 30, 1997 are included in the accompanying financial
statements. The purchase price was allocated $750,000 to software license fees,
$562,431 to other assets acquired, $211,382 to goodwill and $1,418,753 to
liabilities assumed, based on fair values at the date of acquisition. Pursuant
to the purchase agreement, the Company placed 94,643 additional shares of common
stock valued at $47,322 into an escrow account, to be distributed to the seller
upon the occurrence of certain future events. Additionally, the agreement
provides for the issuance of up to 266,667 shares of common stock if revenue
from the purchased technology exceeds certain levels.
 
     Use of Estimates -- The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting years. Actual results could differ from those estimates.
 
     Cash and Cash Equivalents -- Cash equivalents consist of short-term debt
instruments with an original maturity date of 90 days or less at the time of
purchase.
 
     Restricted Cash -- The restricted cash consists of cash that is restricted
under the terms of the Company's line of credit and long-term debt agreements
(Notes 4 and 6) and a $420,000 performance deposit associated with a customer
contract.
 
     Investments -- The Company accounts for investments in accordance with
Statement of Financial Accounting Standards (SFAS) No. 115, Accounting for
Certain Investments and Equity Securities. The Company's investments consist
primarily of high-grade corporate and government securities with maturities of
less than three years. The Company classifies all of its investments as
available-for-sale. Available-for-sale securities are carried at fair value,
with the unrealized gains and losses, net of tax, reported in a separate
component of stockholders' equity. Realized and unrealized gains and losses on
available-for-sale securities were immaterial at September 30, 1997.
 
     Accounts Receivable -- The Company grants credit to businesses located
worldwide. The Company performs on-going credit evaluations of its customers
and, generally, requires no collateral.
 
     Installments Receivable -- Installments receivable represent the present
value of future payments under noncancelable software license agreements which
provide for payments in installments over a two-year period. A portion of the
revenue from each installment payment is recognized as interest income in the
accompanying statements of operations.
 
     Property and Equipment -- Property and equipment are stated at cost.
Depreciation and amortization are provided for on the straight-line and
accelerated methods over the shorter of their estimated useful lives or the
related lease terms, generally three to five years.
 
                                       6
<PAGE>   7
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
     Goodwill -- Goodwill relating to the IOS acquisition is amortized over ten
years on a straight-line basis. The Company assesses the recoverability of
goodwill at each balance sheet date by determining whether the amortization of
the balance over its remaining useful life can be recovered through projected
undiscounted future cash flows expected to be realized from continued sales of
the related products purchased in the IOS acquisition. As of September 30, 1997,
there was no impairment of the recorded amounts for goodwill. Accumulated
amortization was $15,853 at September 30, 1997.
 
     Long-Lived Assets -- The Company accounts for the impairment and
disposition of long-lived assets in accordance with SFAS No. 121, Accounting for
the Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed Of.
In accordance with SFAS No. 121, long-lived assets to be held are reviewed for
events or changes in circumstances which indicate that their carrying value may
not be recoverable. The Company wrote off $3,760,546 of previously capitalized
software costs during the year ended September 30, 1996 after evaluating the
recoverability of capitalized costs and determining that such costs were not
recoverable based on changes in product mix. At September 30, 1997, there was no
impairment of long-lived assets.
 
     Software License Fees -- Software license fees resulting from the IOS
acquisition are amortized using the straight-line method over three years, the
term of the license agreement. Accumulated amortization was $112,500 at
September 30, 1997.
 
     Deferred Rent -- The Company's long-term, noncancelable facility lease
agreements provide for increases in the monthly base rent. Accordingly, rental
expense has been recognized on a straight-line basis over the term of the lease,
and deferred rent has been included in the accompanying balance sheets as of
September 30, 1997 and 1996.
 
     Revenue Recognition -- Revenue is generally recognized on delivery of the
software or hardware or when services are completed and collectibility is
probable in accordance with Statement of Position (SOP) 91-1, Software Revenue
Recognition. Any remaining obligations are accounted for either by accruing the
remaining costs or by deferring a portion of revenue and recognizing it as the
obligations are fulfilled. Revenue from software fees, consulting, support and
maintenance, or hardware sales that is not separately identified in a contract
is recognized ratably over the term of the contract. Revenue related to customer
support agreements is recognized ratably over the term of the agreement,
generally from three months to one year, using the straight-line method.
 
     In October 1997, the American Institute of Certified Public Accountants
issued SOP 97-2, Software Revenue Recognition, which supercedes SOP 91-1. The
provisions of SOP 97-2 are effective for fiscal years beginning after December
15, 1997. The Company is reviewing the impact of the statement on its financial
statements.
 
     Income Taxes -- The Company accounts for income taxes according to SFAS No.
109, Accounting for Income Taxes. SFAS No. 109 is an asset and liability
approach that requires the recognition of deferred tax assets and liabilities
for the expected future tax consequences of events that have been recognized in
the Company's financial statements or tax returns. In estimating future tax
consequences, SFAS No. 109 generally considers all expected future events other
than enactments of changes in the tax laws or rates.
 
     Stock-Based Compensation -- The Company accounts for stock-based awards to
employees using the intrinsic value method in accordance with Accounting
Principles Board (APB) Opinion No. 25, Accounting for Stock Issued to Employees.
 
     Reclassifications -- Certain prior-year balances have been reclassified to
conform with the current year presentation.
 
                                       7
<PAGE>   8
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
 2. PROPERTY AND EQUIPMENT
 
     Property and equipment consist of the following at September 30:
 
<TABLE>
<CAPTION>
                                                         1997          1996
                                                      ----------    ----------
<S>                                                   <C>           <C>
Computers and software..............................  $5,139,712    $1,838,131
Furniture and fixtures..............................     249,209       220,078
                                                      ----------    ----------
                                                       5,388,921     2,058,209
Less accumulated depreciation.......................  (1,650,438)     (845,853)
                                                      ----------    ----------
                                                      $3,738,483    $1,212,356
                                                      ==========    ==========
</TABLE>
 
 3. INCOME TAXES
 
     The Company had elected to be taxed as an S corporation under the
provisions of the federal and state tax codes. Under federal laws, taxes based
on income of S corporations are payable by the corporation's stockholders. In
connection with a financing transaction in December 1996 (Note 10), the Company
terminated its S corporation election. A provision for income taxes has been
provided in the financial statements at statutory rates of 1 1/2% under
California laws, through December 1996, and at applicable statutory rates
thereafter.
 
     The income tax provision consists of the following at September 30, 1997:
 
<TABLE>
<S>                                                           <C>
Current:
  Federal...................................................  $        --
  State.....................................................          800
                                                              -----------
                                                                      800
Deferred:
  Federal...................................................    2,540,637
  State.....................................................      571,701
                                                              -----------
                                                                3,112,338
Change in valuation allowance...............................   (3,112,338)
                                                              -----------
          Total income tax provision........................  $       800
                                                              ===========
</TABLE>
 
     The Company provides deferred income taxes for temporary differences
between assets and liabilities recognized for financial reporting and income tax
purposes. The income tax effects of these temporary differences representing
significant portions of the deferred tax assets and deferred tax liabilities at
September 30, 1997 are as follows:
 
<TABLE>
<S>                                                           <C>
Allowance for doubtful accounts.............................  $   291,251
General business credits....................................      454,184
Net operating loss carryforwards............................    2,449,463
Other.......................................................      (82,560)
                                                              -----------
Net deferred tax asset......................................    3,112,338
Valuation allowance.........................................   (3,112,338)
                                                              -----------
          Net deferred income taxes.........................  $        --
                                                              ===========
</TABLE>
 
     As of September 30, 1997, a valuation allowance of $3,112,338 has been
provided based on the Company's assessment of the future realizability of
certain deferred tax assets.
 
                                       8
<PAGE>   9
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
     The Company has federal and California net operating loss carryforwards
available of approximately $6,300,000 and $3,200,000, respectively, which may be
used to offset future taxable income. These carryforwards expire in 2012 and
2002, respectively. The Company's ability to utilize its carryforwards can be
restricted if there is a change of ownership within a described three-year
period.
 
 4. SHORT-TERM BANK BORROWINGS
 
     The Company has a line of credit with a bank in the amount of $1,500,000,
which expires in April 1998 and of which $1,160,000 and $1,000,000 were
outstanding at September 30, 1997 and 1996, respectively. All borrowings are
payable on demand. Interest is paid monthly at the bank's prime interest rate
(8.5% at September 30, 1997). Borrowings against the line of credit are
collateralized by substantially all assets of the Company, including a minimum
deposit required with the bank, which was $184,857 at September 30, 1997 (Note
1) and which is recorded as restricted cash in the accompanying balance sheets
(Note 1). The agreement requires the Company to maintain certain financial
ratios. The Company was not in compliance with certain of these ratios at
September 30, 1997 but received a waiver of such noncompliance. Subsequent to
September 30, 1997, the Company amended its line of credit arrangement with the
same bank and is currently in compliance with all applicable covenants. In
connection with the amendment, the Company issued warrants to purchase 25,000
shares of common stock at $4.00 per share for a period of five years from the
date the warrants were issued.
 
 5. OBLIGATIONS UNDER CAPITAL LEASES
 
     Capital lease obligations have been recorded in the accompanying financial
statements at the present value of future minimum lease payments, discounted at
interest rates ranging from 10% to 19%.
 
     Assets included in property and equipment financed under capital leases
consist of the following at September 30, 1997 and 1996:
 
<TABLE>
<CAPTION>
                                                         1997         1996
                                                      ----------    ---------
<S>                                                   <C>           <C>
Computers and software..............................  $1,039,970    $ 517,424
Less accumulated amortization.......................    (370,507)    (117,560)
                                                      ----------    ---------
Property and equipment financed under capital
  leases, net.......................................  $  669,463    $ 399,864
                                                      ==========    =========
</TABLE>
 
     Depreciation of property and equipment financed under capital leases
amounted to $252,947 and $117,560 for the years ended September 30, 1997 and
1996, respectively.
 
     Future minimum lease payments under capital leases and the present value of
future minimum lease payments as of September 30, 1997 are as follows:
 
<TABLE>
<S>                                                           <C>
Year ending September 30:
  1998......................................................  $ 440,180
  1999......................................................    294,272
  2000......................................................    127,758
  2001......................................................     35,573
  2002......................................................      9,664
                                                              ---------
          Total future minimum lease payments...............    907,447
Less amount representing interest...........................   (124,140)
                                                              ---------
Present value of future minimum lease payments..............    783,307
Less current portion........................................   (371,574)
                                                              ---------
Present value of future minimum lease payments, net of
  current portion...........................................  $ 411,733
                                                              =========
</TABLE>
 
                                       9
<PAGE>   10
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
     Operating Leases -- The Company leases its facility and various equipment
under long-term, noncancelable operating lease agreements which expire between
1998 and 2002. The facility lease contains a renewal option. Total rent expense
for the years ended September 30, 1997, 1996 and 1995 was $677,384, $472,015 and
$240,349, respectively, for the Company's facilities, and $86,757, $136,960 and
$148,898, respectively, for the Company's equipment.
 
     The following is a schedule by years of future minimum rental payments
required under the operating lease agreements:
 
<TABLE>
<CAPTION>
                                           FACILITY     EQUIPMENT      TOTAL
                                          ----------    ---------    ----------
<S>                                       <C>           <C>          <C>
Year ending September 30:
  1998..................................  $  602,451    $ 94,912     $  697,363
  1999..................................     649,977      80,399        730,376
  2000..................................     649,152      80,399        729,551
  2001..................................     307,944      80,399        388,343
  2002..................................                  73,699         73,699
                                          ----------    --------     ----------
          Total minimum payments
            required....................  $2,209,524    $409,808     $2,619,332
                                          ==========    ========     ==========
</TABLE>
 
 6. NOTES PAYABLE
 
     Notes payable consist of the following at September 30:
 
<TABLE>
<CAPTION>
                                                       1997           1996
                                                    -----------    -----------
<S>                                                 <C>            <C>
Note payable to a bank, monthly payments of
  $13,889 plus interest at the bank's prime rate
  (8.5% at September 30, 1997) plus 1% per annum
  through June 1, 1999, balance of principal and
  interest due July 1, 1999, collateralized by
  substantially all assets of the Company,
  including a minimum deposit required with the
  bank, which was $319,444 at
  September 30, 1997..............................  $   305,566    $   458,333
Note payable to a bank, monthly payments of
  $13,889 plus interest at the bank's prime rate
  (8.5% at September 30, 1997) plus 1% per annum
  through April 3, 2000, balance of principal and
  interest due May 3, 2000, collateralized by
  substantially all assets of the Company,
  including a minimum deposit required with the
  bank, which was $458,333 at September 30,
  1997............................................      444,434
Note payable to a bank, monthly payments of
  $4,167, plus interest at the bank's prime rate
  (8.5% at September 30, 1997) plus 1.5% per
  annum, collateralized by substantially all
  assets of the Company, due March 1998, including
  a minimum deposit required with the bank, which
  was $29,167 at September 30, 1997...............       25,000         75,000
Unsecured subordinated note payable to a customer,
  payment of $2,500,000 due on July 1, 1998,
  interest payable quarterly at 9% per annum,
  through July 1, 1998 (Note 10)..................    2,500,000      4,000,000
                                                    -----------    -----------
                                                      3,275,000      4,533,333
Less current portion..............................   (2,858,334)    (2,008,333)
                                                    -----------    -----------
Notes payable, net of current portion.............  $   416,666    $ 2,525,000
                                                    ===========    ===========
</TABLE>
 
                                       10
<PAGE>   11
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
     As of September 30, 1997, future maturities of notes payable are $2,858,334
and $305,556 and $111,110 for the years ended September 30, 1997, 1998 and 1999,
respectively.
 
     Interest expense related to notes payable and short-term bank borrowings
(Note 4) was $540,807, $461,427 and $88,588 at September 30, 1997, 1996 and
1995, respectively.
 
 7. RELATED-PARTY TRANSACTIONS
 
     Shared Expenses -- The Company engaged in certain transactions with a
corporation in which the Company's major stockholder is also a stockholder. Such
transactions involved cost reimbursements for shared insurance expenses and
resulted in a net account payable to the related party in the amount of $1,704
and $4,883 for the years ended September 30, 1997 and 1996, respectively.
 
     Officer Advances -- From November 30, 1992 through November 30, 1995, the
Company made monthly advances to an officer of the Company. Such advances are
due on demand and accrue interest at various rates ranging from 5.8% to 7%.
 
     Stockholder Notes Receivable -- In connection with the adoption of the 1997
Incentive Stock Option, Nonqualified Stock Option and Restricted Stock Option
Plan (the Plan) (Note 10), certain stockholders were issued restricted stock in
return for cancellation of options under the previous plan. As consideration for
the stock received, the stockholders issued notes payable to the Company
totaling $375,125. The notes bear interest at a rate of 7% per annum, with
principal and interest due on February 28, 2002, and are secured by the stock
received. The notes, including accrued interest of $15,318, have been included
as a separate component of stockholders' equity in the accompanying financial
statements at September 30, 1997.
 
 8. EMPLOYEE BENEFIT PLAN
 
     The Company has a qualified 401(k) Employee Savings and Profit Sharing Plan
(the Plan) for the benefit of its employees. The Plan covers substantially all
full-time employees over 21 years of age with at least six months of service.
Under the Plan, employees can contribute and defer taxes on compensation
contributed. The Company also has the option to make contributions at the
discretion of its Board of Directors. No Company contributions were made for the
years ended September 30, 1997, 1996 and 1995.
 
 9. CONTINGENCIES
 
     At September 30, 1997, the Company is involved in certain pending legal
actions and proceedings involving one of its customers. Management of the
Company, taking into account its insurance coverage, believes that the outcome
of this litigation will not have a material adverse financial impact on the
Company. Accordingly, no provision for pending legal actions and proceedings has
been made in the accompanying financial statements as of September 30, 1997.
 
10. STOCKHOLDERS' EQUITY
 
     Issuance of Preferred Shares -- On December 27, 1996, the Company issued
4,209,863 shares of Series B Senior Convertible Participating Preferred Stock
for $14,999,741 (Series B preferred stock). The Series B preferred stock has a
liquidation preference of $3.56 per share, plus any declared and unpaid
dividends. The liquidation preference is subject to adjustment as defined.
During the year ended September 30, 1997, $134,643 was accreted toward the
Series B preferred stock liquidation preference, using the effective interest
method.
 
     Each share of Series B preferred stock is convertible into common stock, at
the option of the holder, at any time after the date of issuance, based on the
then-applicable conversion ratio (initial liquidation
 
                                       11
<PAGE>   12
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
preference divided by a calculated conversion price). Such price adjusts for
certain sales of capital stock below the then-existing conversion price.
 
     The terms of the Series B preferred stock provide for redemption, at the
option of the holder, after December 27, 2001, if such redemption has been
requested by a majority of Series B preferred stockholders. The stock is
redeemable at an amount equal to the sum of $3.56 per share, plus any declared
and unpaid dividends. The stock is subject to a mandatory conversion upon the
completion of an initial public offering by the Company, which exceeds
$20,000,000 in gross proceeds. If the valuation of the Company immediately prior
to such offering is less than $131,125,000, as defined, the conversion formula
will be adjusted to provide for issuance of common stock such that each share of
the Series B preferred stock will have a value in the offering of at least
$8.91.
 
     The Company is prohibited from declaring dividends on any form of stock
without the approval of the majority of the holders of the Series B preferred
stock. The Series B stockholders are also entitled to one seat on the Company's
Board of Directors.
 
     Immediately preceding such financing, the Company reincorporated in the
State of Delaware. The effect of such reincorporation was to place a $.01 par
value on the Company's common stock, authorize 4,300,000 shares of Series B
preferred stock at a $.01 par value, and reduce the authorized number of Series
A preferred stock to 348,687 shares at a $.01 par value. The financial
statements have been retroactively restated for all periods presented to reflect
the effect of such reincorporation.
 
     Stock-Option Plans -- In February 1997, the Company adopted the 1997
Incentive Stock Option, Nonqualified Stock Option and Restricted Stock Purchase
Plan (the Plan). The total number of shares, in aggregate, of common stock that
may be issued under the Plans shall not exceed 2,750,000 unless certain changes
in the Company's capital structure, as indicated in the agreement, occur.
Incentive options may be issued to officers, key employees and members of the
Board of Directors. Nonqualified options and restricted shares may be issued to
officers, key employees, members of the Board of Directors, or other parties as
determined by the Board of Directors. The exercise prices are to be determined
pursuant to formulas specified in the Plans but not less than the fair market
value at the grant date. Incentive options expire within a period of ten years
from the date the incentive option is granted, unless it is granted to a person
who is the beneficial owner of 10% or more of the outstanding stock of the
Company, in which case the option will expire within a period of five years.
Nonqualified options expire within a period of ten years from the date of the
grant. An offeree of restricted shares has 90 days to accept such offer.
 
     In connection with the adoption of the 1997 Plan, all previous options
outstanding were canceled and reissued at fair market value.
 
<TABLE>
<CAPTION>
                                                                            WEIGHTED
                                                                            AVERAGE
                                                              NUMBER OF     EXERCISE
                                                                SHARES       PRICE
                                                              ----------    --------
<S>                                                           <C>           <C>
Outstanding at October 1, 1995..............................   1,017,523     $0.26
  Granted...................................................     121,000      0.50
  Canceled..................................................     (95,000)     0.23
                                                              ----------
Outstanding at September 30, 1996...........................   1,043,523      0.29
  Granted (weighted average fair value of $0.22)............   1,377,019      0.51
  Canceled..................................................  (1,068,523)     0.29
                                                              ----------
Outstanding at September 30, 1997...........................   1,352,019      0.51
                                                              ==========
</TABLE>
 
                                       12
<PAGE>   13
                           SUBSCRIBER COMPUTING, INC.
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                      OPTIONS OUTSTANDING               OPTIONS EXERCISABLE
           -----------------------------------------   ----------------------
                         WEIGHTED AVERAGE   WEIGHTED                 WEIGHTED
                            REMAINING       AVERAGE                  AVERAGE
EXERCISE     NUMBER        CONTRACTUAL      EXERCISE     NUMBER      EXERCISE
 PRICE     OUTSTANDING     LIFE (YEARS)      PRICE     EXERCISABLE    PRICE
- --------   -----------   ----------------   --------   -----------   --------
<S>        <C>           <C>                <C>        <C>           <C>
0$.50..     1,325,019          9.5           $0.50       416,250      $0.50
1.00..         27,000          9.5            1.00         5,000       1.00
            ---------                                    -------
            1,352,019                                    421,250
            =========                                    =======
</TABLE>
 
     Additional Stock Option Information -- As discussed in Note 1, the Company
continues to account for its stock-based awards using the intrinsic value method
in accordance with APB Opinion No. 25, Accounting for Stock Issued to Employees,
and its related interpretations. No compensation expense has been recognized in
the financial statements for employee stock arrangements.
 
     SFAS No. 123, Accounting for Stock-Based Compensation, requires the
disclosure of pro forma net income had the Company adopted the fair value method
as of the beginning of fiscal 1996. Under SFAS No. 123, the fair value of
stock-based awards to employees is calculated through the use of option-pricing
models, even though such models were developed to estimate the fair value of
freely tradable, fully transferable options without vesting restrictions, which
significantly differ from the Company's stock option awards. These models also
require subjective assumptions, including future stock price volatility and
expected time to exercise, which greatly affect the calculated values. The
effect of applying the fair value method of SFAS No. 123 to the Company's option
grants would not result in net income that is materially different from the
amounts reported in the Company's financial statements.
 
     Warrants -- In August 1995, the Company issued warrants to purchase 348,687
shares of Series A convertible preferred stock at $4.00 per share for a period
of three years from the date the warrants were issued or one year after the
completion of an initial public offering, whichever is later. As of September
30, 1997, all of the warrants were exercisable and none were exercised. No value
was originally ascribed to such warrants.
 
11. MAJOR CUSTOMERS
 
     During the year ended September 30, 1997, sales to two customers accounted
for 27% and 11% of total revenues. During the year ended September 30, 1996, the
Company recorded substantial sales to two customers, accounting for 18% and 13%
of total revenues. During the year ended September 30, 1995, the Company
recorded substantial sales to four customers, which accounted for 13%, 11%, 10%
and 10% of total revenue. As of September 30, 1996 and 1997, the Company also
has deferred revenue of $2,000,666 and $578,276, respectively, from a
significant customer for consulting services and future license deliveries. A
decision by a significant customer to decrease the amount purchased from the
Company or to cease carrying the Company's products could have a material
adverse effect on the Company's financial condition and results of operations.
 
12. GEOGRAPHIC INFORMATION
 
     The Company had worldwide export sales of approximately 36%, 28% and 44%
for fiscal years 1997, 1996 and 1995, respectively.
 
                                       13

<PAGE>   1
                                                                    EXHIBIT 99.2

               PRO FORMA COMBINED CONDENSED FINANCIAL STATEMENTS
 
     The unaudited pro forma combined condensed balance sheet combines Corsair's
unaudited balance sheet as of March 31, 1998 with Subscriber's unaudited balance
sheet as of March 31, 1998, giving effect to the Merger as if it occurred on
March 31, 1998. The unaudited pro forma combined condensed statements of
operations for the periods ended March 31, 1998 and 1997, respectively, combine
Corsair's statements of operations for the three month periods ended March 31,
1998 and 1997 with Subscribers statements of operations for the three month
periods ended March 31, 1998 and December 31, 1996, and the unaudited pro forma
combined condensed statements of operations for the years ended December 31,
1997, 1996 and 1995, respectively, combine Corsair's statements of operations
for each of the years in the three-year period ended December 31, 1997 with
Subscriber's statements of operations for each of the years in the three-year
period ended September 30, 1997, giving effect to the Merger as if it had
occurred at the beginning of each period presented on a pooling of interests
basis. The financial information of Corsair has been derived from Corsair's
audited financial statements for each of the years in the three-year period
ended December 31, 1997 and Corsair's unaudited financial statements for each of
the three month periods ended March 31, 1998 and 1997 which are included
elsewhere herein and should be read in conjunction with such financial
statements and the notes thereto. The financial information of Subscriber has
been derived from Subscriber's audited financial statements for each of the
years in the three-year period ended September 30, 1997 which are included
herein and should be read in conjunction with such financial statements and
notes thereto and Subscriber's unaudited financial statements for each of the
three month periods ended March 31, 1998 and December 31, 1996 which are not
included elsewhere herein. The pro forma information is not necessarily
indicative of the operating results or financial position that would have
occurred had the Merger been consummated at the beginning of the periods
presented, nor is it necessarily indicative of future operating results or
financial position.
 
                                       1
<PAGE>   2
 
                   PRO FORMA COMBINED CONDENSED BALANCE SHEET
                           (IN THOUSANDS; UNAUDITED)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                              CORSAIR         SUBSCRIBER       PRO FORMA        PRO FORMA
                                           COMMUNICATIONS   COMPUTING, INC.   ADJUSTMENTS       COMBINED
                                           MARCH 31, 1998   MARCH 31, 1998    (SEE NOTE 2)   MARCH 31, 1998
                                           --------------   ---------------   ------------   ---------------
<S>                                        <C>              <C>               <C>            <C>
Current assets:
  Cash and cash equivalents..............     $ 11,433         $  1,513         $   217         $ 13,163
  Short-term investments.................       49,121              807              --           49,928
  Trade accounts receivable, net.........        7,616            4,060              --           11,676
  Other receivables......................          970              278              --            1,248
  Evaluation inventory...................        2,873               --              --            2,873
  Inventories, net.......................        3,861               --              --            3,861
  Prepaid expenses.......................          311              579              --              890
                                              --------         --------         -------         --------
          Total current assets...........       76,185            7,237             217           83,639
Property and equipment, net..............        3,820            3,716              --            7,536
Other assets.............................        1,717              192              --            1,909
                                              --------         --------         -------         --------
                                              $ 81,722         $ 11,145         $   217         $ 93,084
                                              ========         ========         =======         ========
 
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Accounts payable.......................     $    992         $  1,796         $    --         $  2,788
  Accrued expenses.......................        6,250            2,263           2,300           10,813
  Current portion of notes payable.......           --            5,864              --            5,864
  Current portion of capital lease
     obligations.........................          440              372              --              812
  Deferred revenue.......................       10,481            3,384              --           13,865
                                              --------         --------         -------         --------
          Total current liabilities......       18,163           13,679           2,300           34,142
  Notes payable, net of current
     portion.............................           --            2,188              --            2,188
  Capital lease obligations, net of
     current portion.....................          328              241              --              569
  Other long-term liabilities............           --              139              --              139
                                              --------         --------         -------         --------
          Total liabilities..............       18,491           16,247           2,300           37,038
                                              --------         --------         -------         --------
Commitments and contingencies
Stockholders' equity (deficit):
  Convertible preferred stock............           --               42             (42)              --
  Common stock...........................           14               84             (80)              18
  Note receivable from stockholder.......         (100)            (404)             --             (504)
  Additional paid-in capital.............       89,382           15,069             339          104,790
  Deferred compensation..................         (533)              --              --             (533)
  Accumulated deficit....................      (25,532)         (19,893)         (2,300)         (47,725)
                                              --------         --------         -------         --------
          Total stockholders' equity
            (deficit)....................       63,231           (5,102)         (2,083)          56,046
                                              --------         --------         -------         --------
                                              $ 81,722         $ 11,145         $   217         $ 93,084
                                              ========         ========         =======         ========
</TABLE>
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       2
<PAGE>   3
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                (IN THOUSANDS, EXCEPT PER SHARE DATA: UNAUDITED)
 
<TABLE>
<CAPTION>
                                                 CORSAIR             SUBSCRIBER           PRO FORMA
                                              COMMUNICATIONS      COMPUTING, INC.          COMBINED
                                            THREE MONTHS ENDED   THREE MONTHS ENDED   THREE MONTHS ENDED
                                              MARCH 31, 1998       MARCH 31, 1998       MARCH 31, 1998
                                            ------------------   ------------------   ------------------
<S>                                         <C>                  <C>                  <C>
Revenues:
  Product revenue.........................       $12,965              $ 1,911              $14,876
  Service revenue.........................         2,270                1,691                3,961
                                                 -------              -------              -------
          Total revenues..................        15,235                3,602               18,837
Cost of revenues:
  Product revenue costs...................         6,038                  963                7,001
  Service revenue costs...................         1,188                  957                2,145
                                                 -------              -------              -------
          Total cost of revenues..........         7,226                1,920                9,146
                                                 -------              -------              -------
          Gross profit....................         8,009                1,682                9,691
Operating costs and expenses:
  Research and development................         2,194                2,431                4,625
  Sales and marketing.....................         2,363                1,092                3,455
  General and administrative..............         1,293                  701                1,994
                                                 -------              -------              -------
          Total operating costs and
            expenses......................         5,850                4,224               10,074
                                                 -------              -------              -------
          Operating income (loss).........         2,159               (2,542)                (383)
Interest income (expense), net............           851                   93                  944
                                                 -------              -------              -------
  Income (loss) before income taxes.......         3,010               (2,449)                 561
Income taxes..............................           254                   --                  254
                                                 -------              -------              -------
Net income (loss).........................       $ 2,756              $(2,449)             $   307
                                                 =======              =======              =======
Basic net income (loss) per share data:
Basic net income (loss)...................       $  0.20              $ (0.30)(1)          $  0.02
                                                 =======              =======              =======
Shares used in per share calculation......        13,672                8,444               17,150
                                                 =======              =======              =======
Diluted net income (loss) per share data:
Diluted net income (loss).................       $  0.19              $ (0.30)(1)          $  0.02
                                                 =======              =======              =======
Shares used in per share calculation......        14,354                8,444               18,115
                                                 =======              =======              =======
</TABLE>
 
- ---------------
(1) The reported amount considers accretion attributable to preferred
    stockholders.
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       3
<PAGE>   4
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                (IN THOUSANDS, EXCEPT PER SHARE DATA: UNAUDITED)
 
<TABLE>
<CAPTION>
                                                 CORSAIR             SUBSCRIBER           PRO FORMA
                                              COMMUNICATIONS      COMPUTING, INC.          COMBINED
                                            THREE MONTHS ENDED   THREE MONTHS ENDED   THREE MONTHS ENDED
                                              MARCH 31, 1997     DECEMBER 31, 1996      MARCH 31, 1997
                                            ------------------   ------------------   ------------------
<S>                                         <C>                  <C>                  <C>
Revenues:
  Product revenue.........................       $ 8,167               $1,952              $10,119
  Service revenue.........................           929                1,110                2,039
                                                 -------               ------              -------
          Total revenues..................         9,096                3,062               12,158
Cost of revenues:
  Product revenue costs...................         7,480                  390                7,870
  Service revenue costs...................           829                  856                1,685
                                                 -------               ------              -------
          Total cost of revenues..........         8,309                1,246                9,555
                                                 -------               ------              -------
          Gross profit....................           787                1,816                2,603
Operating costs and expenses:
  Research and development................         1,382                  824                2,206
  Sales and marketing.....................         1,548                  422                1,970
  General and administrative..............           991                  998                1,989
                                                 -------               ------              -------
          Total operating costs and
            expenses......................         3,921                2,244                6,165
                                                 -------               ------              -------
          Operating loss..................        (3,134)                (428)              (3,562)
Interest expense, net.....................            (3)                (125)                (128)
                                                 -------               ------              -------
  Loss before income taxes................        (3,137)                (553)              (3,690)
Income taxes..............................             3                    1                    4
                                                 -------               ------              -------
Net loss..................................       $(3,140)              $ (554)             $(3,694)
                                                 =======               ======              =======
Basic and diluted net income (loss) per
  share data:
Basic and diluted net income (loss).......       $ (3.08)              $(0.07)(1)          $ (1.39)
                                                 =======               ======              =======
Shares used in per share calculation......         1,019                7,435                2,658
                                                 =======               ======              =======
</TABLE>
 
- ---------------
(1) The reported amount considers accretion attributable to preferred
stockholders.
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       4
<PAGE>   5
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                (IN THOUSANDS, EXCEPT PER SHARE DATA: UNAUDITED)
 
<TABLE>
<CAPTION>
                                                  CORSAIR             SUBSCRIBER            PRO FORMA
                                              COMMUNICATIONS       COMPUTING, INC.          COMBINED
                                                YEAR ENDED            YEAR ENDED           YEAR ENDED
                                             DECEMBER 31, 1997    SEPTEMBER 30, 1997    DECEMBER 31, 1997
                                             -----------------    ------------------    -----------------
<S>                                          <C>                  <C>                   <C>
Revenues:
  Product revenue..........................       $41,887              $ 8,298               $50,185
  Service revenue..........................         5,951                4,720                10,671
                                                  -------              -------               -------
          Total revenues...................        47,838               13,018                60,856
Cost of revenues:
  Product revenue costs....................        27,954                1,887                29,841
  Service revenue costs....................         3,562                3,464                 7,026
                                                  -------              -------               -------
          Total cost of revenues...........        31,516                5,351                36,867
          Gross profit.....................        16,322                7,667                23,989
Operating costs and expenses:
  Research and development.................         6,975                5,550                12,525
  Sales and marketing......................         7,486                3,925                11,411
  General and administrative...............         3,868                5,564                 9,432
                                                  -------              -------               -------
          Total operating costs and
            expenses.......................        18,329               15,039                33,368
                                                  -------              -------               -------
          Operating loss...................        (2,007)              (7,372)               (9,379)
Interest income (expense), net.............         1,374                 (183)                1,189
                                                  -------              -------               -------
  Loss before income taxes and
     extraordinary item....................          (633)              (7,555)               (8,188)
Income taxes...............................             7                    1                     8
                                                  -------              -------               -------
Loss before extraordinary item.............          (640)              (7,556)               (8,196)
Loss on debt extinguishment, net of
  taxes....................................          (428)                  --                  (428)
                                                  -------              -------               -------
Net loss...................................       $(1,068)             $(7,556)              $(8,624)
                                                  =======              =======               =======
Basic and diluted net loss per share data:
Loss before extraordinary item.............       $ (0.10)             $ (0.96)(1)           $ (0.85)
Extraordinary item.........................       $ (0.06)             $    --               $ (0.05)
                                                  -------              -------               -------
Basic and diluted net loss per share.......       $ (0.16)             $ (0.96)(1)           $ (0.90)
                                                  =======              =======               =======
Shares used in per share calculation.......         6,643                8,023                 9,626
                                                  =======              =======               =======
</TABLE>
 
- ---------------
(1) The reported amount considers accretion attributable to preferred
stockholders.
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       5
<PAGE>   6
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                (IN THOUSANDS, EXCEPT PER SHARE DATA: UNAUDITED)
 
<TABLE>
<CAPTION>
                                                  CORSAIR             SUBSCRIBER            PRO FORMA
                                              COMMUNICATIONS       COMPUTING, INC.          COMBINED
                                                YEAR ENDED            YEAR ENDED           YEAR ENDED
                                             DECEMBER 31, 1996    SEPTEMBER 30, 1996    DECEMBER 31, 1996
                                             -----------------    ------------------    -----------------
<S>                                          <C>                  <C>                   <C>
Revenues:
  Product revenue..........................      $ 18,178              $ 7,380              $ 25,558
  Service revenue..........................         1,428                4,230                 5,658
                                                 --------              -------              --------
          Total revenues...................        19,606               11,610                31,216
Cost of revenues:
  Product revenue costs....................        17,235                2,444                19,679
  Service revenue costs....................         1,962                3,294                 5,256
                                                 --------              -------              --------
          Total cost of revenues...........        19,197                5,738                24,935
                                                 --------              -------              --------
          Gross profit.....................           409                5,872                 6,281
Operating costs and expenses:
  Research and development.................         4,983                3,600                 8,583
  Sales and marketing......................         5,374                2,390                 7,764
  General and administrative...............         2,591                2,691                 5,282
  Write-off of capitalized software........            --                3,760                 3,760
                                                 --------              -------              --------
          Total operating costs and
            expenses.......................        12,948               12,441                25,389
                                                 --------              -------              --------
          Operating loss...................       (12,539)              (6,569)              (19,108)
Interest expense, net......................          (220)                (274)                 (494)
                                                 --------              -------              --------
  Loss before income taxes.................       (12,759)              (6,843)              (19,602)
Income taxes...............................             2                    1                     3
                                                 --------              -------              --------
Net loss...................................      $(12,761)             $(6,844)             $(19,605)
                                                 ========              =======              ========
Basic and diluted net loss per share.......      $ (96.67)             $ (0.92)             $ (11.57)
                                                 ========              =======              ========
Shares used in per share calculation.......           132                7,426                 1,694
                                                 ========              =======              ========
</TABLE>
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       6
<PAGE>   7
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                  (IN THOUSANDS, EXCEPT SHARE DATA: UNAUDITED)
 
<TABLE>
<CAPTION>
                                                     CORSAIR            SUBSCRIBER           PRO FORMA
                                                 COMMUNICATIONS      COMPUTING, INC.         COMBINED
                                                   YEAR ENDED           YEAR ENDED          YEAR ENDED
                                                DECEMBER 31, 1995   SEPTEMBER 30, 1995   DECEMBER 31, 1995
                                                -----------------   ------------------   -----------------
<S>                                             <C>                 <C>                  <C>
Revenues:
     Product revenue..........................      $  7,351              $4,731              $12,082
     Service revenue..........................           242               2,815                3,057
                                                    --------              ------              -------
          Total revenues......................         7,593               7,546               15,139
Cost of revenues:
     Product revenue costs....................         7,522               2,177                9,699
     Service revenue costs....................           615               2,402                3,017
                                                    --------              ------              -------
          Total cost of revenues..............         8,137               4,579               12,716
                                                    --------              ------              -------
          Gross profit (deficit)..............          (544)              2,967                2,423
Operating costs and expenses:
     Research and development.................         3,094                 327                3,421
     Sales and marketing......................         2,981               1,293                4,274
     General and administrative...............         2,115               1,432                3,547
                                                    --------              ------              -------
          Total operating costs and
            expenses..........................         8,190               3,052               11,242
                                                    --------              ------              -------
          Operating loss......................        (8,734)                (85)              (8,819)
Interest income (expense), net................           218                 (37)                 181
                                                    --------              ------              -------
     Loss before income taxes.................        (8,516)               (122)              (8,638)
Income taxes..................................             1                   1                    2
                                                    --------              ------              -------
Net loss......................................      $ (8,517)             $ (123)             $(8,640)
                                                    ========              ======              =======
Basic and diluted net loss per share..........      $(774.27)             $(0.02)             $ (5.49)
                                                    ========              ======              =======
Shares used in per share calculation..........            11               7,426                1,573
                                                    ========              ======              =======
</TABLE>
 
  See accompanying notes to Pro Forma Combined Condensed Financial Statements.

                                       7
<PAGE>   8
 
           NOTES TO PRO FORMA COMBINED CONDENSED FINANCIAL STATEMENTS
                                  (UNAUDITED)
 
NOTE 1. PERIODS COMBINED
 
     The unaudited Pro Forma Combined Condensed Statements of Operations combine
the historical statements of operations of Corsair for the three months ended
March 31, 1998 and 1997 and the fiscal years ended December 31, 1997, 1996 and
1995 with the historical statements of operations of Subscriber for the three
months ended March 31, 1998 and December 31, 1996, and the fiscal years ended
September 30, 1997, 1996 and 1995, respectively. Due to the periods combined as
described above, Subscriber's net revenues of $2.9 million and net loss of $5.0
million for the three months ended December 31, 1997 are not included in the Pro
Forma Combined Condensed Statements of Operations. The unaudited Pro Forma
Combined Condensed Balance Sheet combines Corsair's unaudited balance sheet as
of March 31, 1998 with Subscriber's unaudited Balance Sheet as of March 31,
1998, giving effect to the Merger as if it had occurred on March 31, 1998.
 
     The pro forma information presented is not necessarily indicative of the
future consolidated results of operations of the Combined Company or the
consolidated results of operations which would have resulted had the Merger
taken place during the periods presented. The Unaudited Pro Forma Financial
Statements reflect the effects of the Merger, assuming the Merger and related
events occurred as of March 31, 1998 for the purposes of the unaudited Pro Forma
Combined Condensed Balance Sheet and as of January 1, 1995 for the purposes of
the unaudited Pro Forma Combined Condensed Statements of Operations.
 
NOTE 2. BASIS OF PRESENTATIONS
 
  Pro forma outstanding Corsair common stock
 
     The maximum number of shares of Corsair common stock to be issued in the
Merger (including Corsair common stock to be reserved for issuance upon exercise
of Subscriber's options and warrants to be assumed by Corsair) in exchange for
the acquisition by Corsair of all outstanding Subscriber capital stock and all
outstanding options and warrants to acquire Subscriber capital stock, assuming
the transaction took place on March 31, 1998, would have been approximately
3,919,703 shares. Consequently, the actual exchange ratios will depend on the
capitalization of Subscriber and the closing market price of Corsair Common
Stock for the preceding ten trading days at the Effective Time. Assuming that
the capitalization of Subscriber at the Effective Time is in all other respects
identical to the capitalization as of March 31, 1998, the common exchange ratio
would be 0.21030 of a share of Corsair common stock for each outstanding share
of Subscriber common stock and would be 0.40224 of a share of Corsair common
stock for each outstanding share of Subscriber Series B Preferred Stock
(assuming a market price of $18.563 per share of Corsair common stock). Such
exchange ratios were used in preparing the pro forma combined financial data and
the following table which provides the pro forma share issuance in connection
with the Merger:
 
<TABLE>
<CAPTION>
                                                                                          NUMBER OF
                                                              NUMBER                       CORSAIR
                                                         OUTSTANDING AS OF                EQUIVALENT
      OUTSTANDING EQUITY INTERESTS OF SUBSCRIBER          MARCH 31, 1998       RATIO        SHARES
      ------------------------------------------         -----------------    --------    ----------
<S>                                                      <C>                  <C>         <C>
Series B Senior Convertible Participating Preferred
  Stock................................................      4,209,863        0.40224     1,693,375
Common Stock...........................................      8,443,944        0.21030     1,775,761
                                                                                          ---------
Total Corsair common shares to be issued...............                                   3,469,136
                                                                                          =========
</TABLE>
 
                                       8
<PAGE>   9
     NOTES TO PRO FORMA COMBINED CONDENSED FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                           NUMBER OF
                                                                                            CORSAIR
                                                                                          EQUIVALENT
                                                            NUMBER                          EQUITY
                                                       OUTSTANDING AS OF                 SHARES TO BE
 POTENTIALLY DILUTIVE EQUITY INTERESTS OF SUBSCRIBER    MARCH 31, 1998       RATIO          ISSUED
 ---------------------------------------------------   -----------------    --------    ---------------
<S>                                                    <C>                  <C>         <C>
Warrant to purchase Series B Senior Convertible
  Participating Preferred Stock......................         61,043        0.40224           24,554
Warrant to purchase Series A Convertible Preferred
  Stock..............................................        361,652        0.21030           76,055
Warrant to purchase Common Stock.....................         25,000        0.21030            5,258
Options to purchase Common Stock.....................      1,639,089        0.21030          344,700
                                                                                           ---------
Total other potentially dilutive securities of
  Corsair to be issued...............................                                        450,567
                                                                                           =========
</TABLE>
 
  Pro Forma Adjustments
 
     Corsair and Subscriber estimate that they will incur Merger-related
expenses, consisting primarily of transaction costs for investment bankers fees,
attorneys, accountants, financial printing and other related charges, of
approximately $2.3 million. This estimate is preliminary and is therefore
subject to change. These nonrecurring expenses will be charged to operations in
the fiscal quarter in which the Merger is consummated.
 
     It is expected that following the Merger, the Combined Company will incur
additional costs associated with integrating the two companies. These costs are
not currently estimable and have not been reflected on the pro forma combined
condensed balance sheet.
 
     The Pro Forma Combined Condensed Balance Sheet gives effect to such
expenses as if they had been incurred as of March 31, 1998, but the Pro Forma
Combined Condensed Statements of Operations do not give effect to such expenses.
 
     The Pro Forma Combined Condensed Balance Sheet also gives effect to the
assumed conversion of Subscriber's outstanding warrant to purchase 61,043 shares
of Series B Senior Convertible Participating Preferred Stock (24,554 equivalent
number of Corsair shares) for proceeds of approximately $217,000, due to the
warrantholder's expressed intent to exercise the warrant in connection with the
Merger.
 
  Conforming adjustments
 
     No adjustments were required to conform the accounting policies of
Subscriber and Corsair. Certain amounts for Subscriber have been reclassified to
conform to Corsair's financial statements presentation.
 
NOTE 3. PRO FORMA NET INCOME (LOSS) PER SHARE
 
     The pro forma diluted combined net income (loss) per share data is based on
the combined weighted average number of common and dilutive common stock
equivalent shares of Corsair's common stock and Subscriber's common stock and
assumes conversion of all outstanding Subscriber preferred stock at the
beginning of the earliest period presented and further assumes a common exchange
ratio as of March 31, 1998 of 0.21030 of a share of Corsair common stock for
each outstanding share of Subscriber common stock and a preferred stock exchange
ratio as of March 31, 1998 of 0.40224 of a share of Corsair common stock for
each outstanding share of Subscriber preferred stock. The actual number of
shares of Corsair Common Stock to be exchanged for all of the outstanding
Subscriber stock will be determined at the Effective Time based on the
capitalization of Subscriber and the closing market-price of Corsair Common
Stock for the preceding ten trading days at the Effective Time.
 
                                       9
<PAGE>   10
     NOTES TO PRO FORMA COMBINED CONDENSED FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)
 
     The following table reconciles the number of shares used in the pro forma
earnings per share computations to the numbers set forth in Corsair's and
Subscriber's historical statements of operations (in thousands, except the
Exchange Ratio):
 
<TABLE>
<CAPTION>
                                                                                    PRO FORMA
                                                          PRO FORMA FISCAL         THREE MONTHS
                                                      YEARS ENDED DECEMBER 31,   ENDED MARCH 31,
                                                      ------------------------   ----------------
                                                       1995     1996     1997     1997      1998
                                                      ------   ------   ------   ------    ------
<S>                                                   <C>      <C>      <C>      <C>       <C>
Shares used in basic and diluted per share
  computation:
Historical Subscriber -- Common Stock...............   7,426    7,426    8,023    7,435     8,444
Exchange Ratio -- Common Stock......................  0.2103   0.2103   0.2103   0.2103    0.2103
                                                      ------   ------   ------   ------    ------
                                                       1,562    1,562    1,688    1,564     1,776
                                                      ------   ------   ------   ------    ------
Historical Subscriber -- Preferred Stock(1).........      --       --    3,220      186     4,232
Exchange Ratio -- Preferred Stock...................  0.4022   0.4022   0.4022   0.4022    0.4022
                                                      ------   ------   ------   ------    ------
                                                          --       --    1,295       75     1,702
                                                      ------   ------   ------   ------    ------
Historical Corsair..................................      11      132    6,643    1,019    13,672
                                                      ------   ------   ------   ------    ------
Pro Forma Combined -- Basic.........................   1,573    1,694    9,626    2,658    17,150
                                                      ======   ======   ======   ======    ======
Historical Subscriber -- Common Stock
  equivalents(2)....................................      --       --       --       --     1,346
                                                      ------   ------   ------   ------    ------
Exchange Ratio -- Common Stock equivalents(2).......  0.2103   0.2103   0.2103   0.2103    0.2103
                                                      ------   ------   ------   ------    ------
                                                          --       --       --       --       283
                                                      ------   ------   ------   ------    ------
Historical Corsair -- Common Stock equivalents(2)...      --       --       --       --       682
                                                      ------   ------   ------   ------    ------
Pro Forma Combined -- Diluted.......................   1,573    1,694    9,626    2,658    18,115
                                                      ------   ------   ------   ------    ------
</TABLE>
 
- ---------------
(1) Includes the assumed exercise of the warrant to purchase 61,043 shares of
    Series B Senior Convertible Participating Preferred Stock issued in December
    1996, using the treasury stock method, due to the warrantholder's expressed
    intent to exercise the warrant in connection with the Merger.
 
(2) Using the treasury stock method.
 
                                       10


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