CORSAIR COMMUNICATIONS INC
10-Q, 1998-11-13
COMPUTER INTEGRATED SYSTEMS DESIGN
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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


                                    FORM 10-Q

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

 
            For the quarterly period ended September 30, 1998.


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

                         Commission File Number: 0-22859


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

<TABLE>        
<S>                                              <C>     


              DELAWARE                                 77-0390406
   (State or other jurisdiction of                    (IRS Employer
   incorporation or organization)                Identification Number)


 3408 Hillview Avenue Palo Alto, CA                       94304
(Address of principal executive offices)               (Zip Code)
</TABLE>

     REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE IS (650) 842-3300


             
      Indicate by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. 
              (1) [ X ] Yes [ ] No;         (2)  [ X ] Yes     [   ] No;

      The number of shares of the  Registrant's  Common Stock  outstanding as of
October 31, 1998 was 17,887,461.
          


<PAGE>



                                      INDEX



                                                                        Page No.
Part I.  Financial Information

Item 1.  Condensed Consolidated Financial Statements

         Unaudited Condensed Consolidated Balance Sheets as of September
         30, 1998 and December 31, 1997......................................3

         Unaudited Condensed Consolidated Statements of Operations for the
         Three and Nine Months Ended September 30, 1998 and 1997 ............4

         Unaudited Condensed Consolidated Statements of Cash Flows for the
         Nine Months Ended September 30, 1998 and 1997 ......................5

         Notes to Condensed Consolidated Financial Statements ...............6

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

Part II. Other Information

Item 2.  Change in Securities and Use of Proceeds...........................21

Item 5.  Other Information..................................................21

Item 6.  Exhibits and Reports on Form 8-K ..................................21

Signatures .................................................................22





<PAGE>



PART I - FINANCIAL INFORMATION


Item 1. Condensed Consolidated Financial Statements

                           CORSAIR COMUNICATIONS, INC.
               Unaudited Condensed Consolidated Balance Sheets

                                 (In thousands)
<TABLE>
<CAPTION>

                
                                            September 30,      December 31,
                                                 1998              1997
<S>                                        <C>               <C>     
                                           ----------------- -----------------
Assets                
Cash and cash equivalents                      $  21,907          $ 16,915                                             
Short-term investments                            26,667            46,038
Trade accounts receivable, net                    12,446             6,780
Inventories, net                                   5,455             3,618
Evaluation inventory                               1,405             4,590
Prepaids and other                                 2,610             1,415
                                           ----------------- -----------------                
  Total current assets                            70,490            79,356
Property and equipment, net                        7,286             7,110
Other assets                                       1,967             2,393            
                                           ================= =================                
  Total assets                             $      79,743     $      88,859                                                          
                                           ================= =================
Liabilities and Stockholders' Equity
Accounts payable                           $       2,962     $       1,419                                                  
Accrued benefits                                   3,235             3,009
Accrued expenses                                   6,034             5,085
Accrued merger related expenses                    2,436                --
Current portion of notes payable                     595             2,245
Current portion of capita lease                                       
   obligations                                       668               723
Deferred revenue                                   9,563            13,522            
                                           ----------------- -----------------                
  Total current liabilities                       25,493            26,003
Notes payable, net of current portion              1,597             4,694
Capital lease obligations, net of current                            
   portion                                           310               850
                                           ----------------- -----------------                
  Total liabilities                               27,400            31,547            
                                           ----------------- -----------------                
Common stock                                          18                18                                    
Notes receivable from stockholders                 (368)             (511)
Additional paid-in capital                       104,933           103,923
Deferred compensation                              (368)             (648)
Accumulated deficit                             (51,872)          (45,470)            
                                           ----------------- -----------------               
    Total stockholders' equity                    52,343            57,312            
                                           ----------------- -----------------                
    Total  liabilities and stockholders'   
    equity                                 $      79,743     $      88,859
                                           ================= =================
</TABLE>

                
    See accompanying notes to Condensed Consolidated Financial Statements
            


<PAGE>
                
                           CORSAIR COMUNICATIONS, INC.
          Unaudited Condensed Consolidated Statements of Operations
                    (In thousands, except per share data)
<TABLE>
<CAPTION>

                                Three Months Ended       Nine Months Ended
                                   September 30,           September 30,           
                               ----------------------  ----------------------                
                                 1998         1997        1998        1997                       
                               ----------  ----------  ----------  ----------
<S>                            <C>         <C>         <C>         <C>     
Revenues:                
   Hardware revenue            $  5,447    $ 10,079    $ 27,494    $ 26,673
   Software revenue               2,228       2,734       9,444       7,477
   Service revenue                4,348       2,826      12,971       7,015            
                               ----------  ----------  ----------  ----------               
      Total revenues             12,023      15,639      49,909      41,165

Cost of revenues:                
   Hardware revenue costs         2,487       6,291      13,779      21,002
   Software revenue costs           271         517         979       1,180
   Service revenue costs          1,697       1,708       6,191       4,941            
                               ----------  ----------  ----------  ----------                
      Total cost of revenues      4,455       8,516      20,949      27,123
                               ----------  ----------  ----------  ----------                
              Gross profit        7,568       7,123      28,960      14,042            
                               ----------  ----------  ----------  ----------
Operating costs and expenses:                
   Research and development       4,663       3,862      13,628       9,233
   Sales and marketing            4,544       3,017      12,135       7,901
   General and administrative     2,073       2,550       6,497       6,799
   Merger related expenses            -           -       4,481           -            
                               ----------  ----------  ----------  ----------                
Total operating costs and         
expenses                         11,280       9,429      36,741      23,933
                               ----------  ----------  ----------  ----------                            
   Operating loss                (3,712)     (2,306)     (7,781)     (9,891)
Interest income, net                623         553       1,969         456
                               ----------  ----------  ----------  ----------                
   Loss before income taxes      (3,089)     (1,753)     (5,812)     (9,435)
Income taxes                          -           5         364           8           
                               ----------  ----------  ----------  ----------
Loss before extraordinary item  (3,089)     (1,758)      (6,176)     (9,443)
Extraordinary loss on debt             
   extinguishment                     -       (428)        (226)       (428)
                               ----------  ----------  ----------  ----------                
Net loss                       $ (3,089)   $(2,186)    $ (6,402)   $ (9,871)            
                               ==========  ==========  ==========  ==========
</TABLE>

<TABLE>
                
Basic and diluted net loss per share data:
<S>                            <C>         <C>         <C>         <C>     

   Basic and diluted netloss
     before extraordinary item $  (0.17)    $ (0.14)   $  (0.35)   $  (0.70)
   Extraordinary loss on debt
     extinguishment                   -       (0.04)      (0.01)      (0.03)            
                               ==========  ==========  ==========  ==========                    
   Basic and diluted net loss            
     per share                 $  (0.17)    $ (0.18)   $  (0.36)   $  (0.73)            
                               ==========  ==========  ==========  ==========                
Shares used in per share          
   calculations                   17,802      12,447      17,705      13,570
                               ==========  ==========  ==========  ==========
</TABLE>
           



                
    See accompanying notes to Condensed Consolidated Financial Statements
            



<PAGE>


                
                          CORSAIR COMMUNICATIONS, INC.
          Unaudited Condensed Consolidated Statements of Cash Flows
                               (In thousands)
<TABLE>
<CAPTION>

                                                        Nine Months Ended
                                                          September 30,           
                                                      ----------------------- 
<S>                                                   <C>          <C>     
                                                         1998         1997           
                                                      ----------   ----------
   Cash flows from operating activities:
     Net loss                                         $  (6,402)   $  (9,871)                                                     
     Adjustments to reconcile net loss to net cash
     provided by (used in) operating activities:
       Depreciation and amortization                      2,740        1,398
       Amortization of deferred compensation and              
       compensation expense                                 380          395
       Loss on disposition of fixed assets                    -          100
       Extraordinary loss on debt extinguishment            226          428
       Merger-related costs                               4,481            -
       Changes in operating assets and liabilities:                
         Trade accounts receivable                      (5,666)      (2,139)
         Inventories                                      1,348      (2,492)
         Prepaid expenses and other assets              (1,794)      (2,035)
         Accounts payable and accrued expenses              673          882
         Deferred revenue                               (3,959)        7,983           
                                                      ----------   ----------              
           Net cash used in operating activities        (7,973)      (5,351)           
                                                      ----------   ----------
Cash flows from investing activities:                
   Purchase of short-term investments                  (13,460)     (53,599)
   Proceeds from sales and maturities of short-term      32,831        9,877   
   investments
   Purchases of property and equipment                  (2,117)      (3,738)           
                                                      ----------   ----------               
          Net cash provided by (used in) investing       17,254     (47,460)
          activities
                                                      ----------   ---------            
Cash flows from financing activities:               
   Proceeds from sale of preferred stock, net of              
   offering costs                                             -       17,090
   Proceeds from issuance of common stock, net of             
   offering costs                                             -       39,055
   Proceeds from stock options and purchase plans         1,010          186
   Proceeds from debt                                     4,128          660
   Principal and prepayment penalty payments on          
   debt obligations                                     (8,875)      (7,244)
   Proceeds from note receivable from stockholder           43            -
   Principal payment on capital lease                     (595)      (1,344)            
                                                      ----------   ----------                
         Net cash provided by (used in) financing        
         activities                                     (4,289)       48,403
                                                      ----------   ----------               
   Net increase (decrease) in cash and cash                
   equivalents                                            4,992      (4,408)
   Cash and cash equivalents, beginning of period        16,915       19,629            
                                                      ==========   ==========                
   Cash and cash equivalents, end of period           $  21,907    $  15,221   
                                                      ==========   ==========                
Cash Paid:
   Interest                                           $     983   $      523                                     
                                                      ==========   ==========                            
   Income taxes                                       $     332    $       8                        
                                                      ==========   ==========
Noncash financing and investing activities:                
   Assets acquired through capital lease                      -    $     790                                  
                                                      ==========   ==========                
   Common stock issued in exchange for stockholder             
   note                                                       -    $     384           
                                                      ==========   ==========              
   Deferred compensation relating to stock option             
   grants                                                     -    $   1,129           
                                                      ==========   ==========
</TABLE>

                
    See accompanying notes to Condensed Consolidated Financial Statements
            


<PAGE>


                
                          CORSAIR COMMUNICATIONS, INC.
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)
            
                
1. Basis of Presentation
         The accompanying  unaudited consolidated financial information has been
   prepared by Corsair  Communications,  Inc.  ("Corsair"  or the  "Company") in
   accordance  with  generally  accepted   accounting   principles  for  interim
   financial statements and pursuant to the rules of the Securities and Exchange
   Commission  for Form 10-Q and  Article  10 of  Regulation  S-X.  Accordingly,
   certain  information and footnotes required by generally accepted  accounting
   principles for complete  financial  statements  have been omitted.  It is the
   opinion of management  that all adjustments  considered  necessary for a fair
   presentation  have  been  included,  and that all such  adjustments  are of a
   normal and recurring  nature. On June 23, 1998,  Corsair acquired  Subscriber
   Computing,   Inc.   ("SCI")  in  a   combination   accounted  for  under  the
   pooling-of-interests  method of accounting.  Corsair's condensed consolidated
   financial statements have been restated to include the financial position and
   results  of SCI  for  all  periods  presented.  Due to the  fiscal  year  end
   conversion of SCI to that of Corsair,  SCI'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 unaudited  condensed  consolidated  statements of operations.
   Operating results for the periods presented are not necessarily indicative of
   the results  that may be expected  for any future  periods.  These  condensed
   consolidated   financial  statements  should  be  read  in  conjunction  with
   Corsair's Annual Report on Form 10-K for the year ended December 31, 1997 and
   Registration Statement on Form S-4, dated May 27, 1998.

         The  condensed   consolidated   financial  statements  include  Corsair
   Communications,   Inc.,   and  its   subsidiary.   Significant   intercompany
   transactions and accounts have been eliminated.


2. Revenue Recognition
         Revenue from hardware sales is recognized upon shipment, unless a sales
   agreement   contemplates   that  Corsair  provide  testing,   integration  or
   implementation  services,  in which case hardware  revenue is recognized upon
   commissioning  and acceptance of the product (the activation of the cell site
   equipment following testing integration and implementation). Revenue from the
   licensing of software  products  generally is recognized upon delivery of the
   products,  unless the sales includes post-contract customer support, in which
   case the revenue is recognized  ratably over the term of the license  period.
   Revenue from services is recognized  ratably over the term of the maintenance
   support,  on a percentage of completion basis over the term of the consulting
   effort, or during the month the training or operations support is provided.


3. Net Income (Loss) Per Share
         Basic net  income  (loss)  per share is based on the  weighted  average
   number of shares of common stock outstanding  during the period.  Diluted net
   income (loss) per share is based on the weighted  average number of shares of
   common stock  outstanding  during the period and dilutive  common  equivalent
   shares from options and  warrants  outstanding  during the period.  No common
   equivalent   shares  are   included   for  loss  periods  as  they  would  be
   anti-dilutive. Dilutive common equivalent shares consist of stock options and
   stock warrants.
            




<PAGE>


                
         The following  tables set forth the computations of shares and net loss
   used in the calculation of basic and diluted net loss per share for the three
   and nine months ended September 30, 1998, and 1997 (in thousands,  except per
   share data):
<TABLE>
<CAPTION>
                                        Three Months            Nine Months
                                           Ended                   Ended
                                       September 30,           September 30,            
                                    -------------------------------------------
<S>                                 <C>         <C>        <C>        <C>                    
                                      1998        1997       1998       1997                             
                                    ----------  ---------  ---------  ---------
                
    Basic and diluted net loss per share data:               
       Net loss                      $ (3,089)   $(2,186)   $(6,402)   $(9,871)          
                                    ==========  =========  =========  =========               
       Actual weighted average
       common shares outstanding for     
       the period                       17,802     12,447     17,705     13,570          
                                     =========  ========= ==========  =========              
    Basic and diluted net loss per                             
    share                           $  (0.17)   $ (0.18)    $(0.36)   $ (0.73)         
                                    ==========  =========  =========  =========
</TABLE>

                
   The Company has excluded the impact of approximately 1,695,315, and 1,080,657
   outstanding  options to purchase  common stock as of  September  30, 1998 and
   1997 and  outstanding  warrants  to purchase  194,249  and 271,545  shares of
   common  stock as of  September  30, 1998 and 1997,  since their  inclusion in
   diluted per share results would have been antidilutive.

4. Inventories
       Inventories are stated at the lower of cost or market and are summarized 
   as follows (in thousands):
<TABLE>
<S>                                                  <C>           <C>     

                                                      September     December
                                                       30, 1998     31, 1997        
                                                     -----------   ----------               
    Raw materials                                      $ 1,813      $  1,479
    Work in progress                                       570           189
    Finished goods                                       3,072         1,950           
                                                     ===========   ==========           
                                                     $   5,455      $  3,618           
                                                     ===========   ==========
</TABLE>

                
5. Merger with Subscriber Computing, Inc.
   On June 23, 1998,  Corsair  issued  approximately  3.9 million  shares of its
   Common Stock in exchange for all of the outstanding shares of Common Stock of
   Subscriber  Computing,  Inc,  ("SCI"),  a provider of software systems to the
   paging,  cellular  and  PCS  industries.  As a  result  of the  merger,  each
   outstanding  share of SCI Preferred  Stock was  converted  into shares of SCI
   Common Stock based on their respective liquidation preference.  Concurrently,
   each share of SCI Common Stock was  converted  into 0.238 shares of Corsair's
   Common  Stock,  and SCI  became a wholly  owned  subsidiary  of  Corsair.  In
   addition,  Corsair has reserved  approximately  464,500  shares of its Common
   Stock for  issuance  upon the  exercise  of  assumed  SCI stock  options  and
   warrants.  The  merger  was  accounted  for as a pooling  of  interests,  and
   accordingly,  the Company's condensed  consolidated financial statements have
   been  restated to include the  financial  position and results of SCI for all
   periods presented.

   The results of operations previously reported by the separate enterprises and
   the combined  amounts  presented in the accompanying  consolidated  financial
   statements are summarized below (in thousands):
<TABLE>
<CAPTION>

                                      Corsair           SCI         Combined          
                                    -------------   ------------   ------------
       <S>                          <C>             <C>            <C>                   
       Six  Months Ended  June 30, 1998
         Total revenue                $  29,682      $    7,879      $  37,561                                       
         Extraordinary loss                 226               -            226
         Net income (loss)                3,861         (7,174)         (3,313)

       Six  Months Ended June 30, 1997
         Total revenue               $   20,319     $    5,027         25,526
         Net loss                        (4,437)        (3,248)        (7,685)

</TABLE>

<PAGE>


      In the second quarter,  Corsair incurred  merger-related and other charges
      of $4.5 million.  The following table presents the components of the total
      from the  second  quarter  along with the  charges  against  the  reserves
      through September 30, 1998 (in thousands):
<TABLE>
       <S>                            <C>     <C>       <C>         <C>     

                                                        Non-cash    September
                                       Total  Amounts   Writedown   30, 1998
                                       Charge   Paid    of Assets    Reserve
                                                                     Balance
       Transaction costs                2,766      435        --       2,331
       Termination benefits (20          
       employees)                       1,511    1,476        --          35
       Redundant facility and other       
       equipment costs                    204       --       134          70
                                       ========================================                
            Total                      $4,481  $ 1,911    $  134    $  2,436
                                       ========================================
</TABLE>                
      Corsair expects that all significant amounts included in the September 30,
      1998 reserve will be paid within the next six months.

6.    Extraordinary Item
            In the second  quarter of fiscal  1998,  Corsair  incurred a loss on
      debt  extinguishment of $226,000  associated with paying the principal and
      interest of $4.8 million of short-term and long-term  notes  payable.  The
      loss  was  comprised  of the  amortization  of  the  remaining  loan  fees
      associated with the debt issuance.

            In the  third  quarter  of  1997,  Corsair  incurred  a loss on debt
      extinguishment  of  $428,000   comprised  of  pre-payment   penalties  and
      amortization  of the remaining  discount on debt  associated with warrants
      issued for selected Notes Payable.  The total  principal and interest paid
      by early extinguishment was $5.1 million.

7.    Recent Pronouncements
            In June  1997,  SFAS  No.  131,  "Disclosure  About  Segments  of an
      Enterprise  and  Related  Information"  (SFAS No.  131),  was  issued  and
      established  standards  for the manner in which  public  companies  report
      information  about  operating  segments  in annual and  interim  financial
      statements  issued to  shareholders.  Corsair has not yet  determined  the
      manner in which it will present the information required by SFAS No.
      131.

                  On January 1, 1998,  Corsair adopted SFAS No. 130,  "Reporting
      Comprehensive  Income",  which  establishes  standards  for  reporting and
      disclosure of comprehensive income and its components (revenues, expenses,
      gains and losses) in a full set of general-purpose  financial  statements.
      In Corsair's  circumstances,  total  comprehensive  income  (loss) for all
      periods  presented herein would not have differed from reported net income
      (loss).

            In June 1998, the Financial  Accounting  Standards Board issued SFAS
      No. 133,  "Accounting for Derivative  Instruments and Hedging Activities".
      This  statement   establishes   accounting  and  reporting  standards  for
      derivative instruments and hedging activities. Currently, Corsair does not
      use either of these financial tools and therefore has not been impacted by
      the issuance of this standard.
            

<PAGE>



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

                
      This discussion may contain forward-looking  statements that involve risks
and  uncertainties.  Corsair's  actual  results may differ  materially  from the
results discussed in such forward-looking  statements.  Factors that might cause
such a difference include, but are not limited to, those discussed in "Risks and
Uncertainties"  below.  Corsair undertakes no obligation to release publicly the
results of any revisions to these  forward-looking  statements to reflect events
or circumstances arising after the date hereof.

The  following   should  be  read  in  conjunction   with  Corsair's   condensed
consolidated financial statements and notes thereto.

Recent Events

      Corsair is a leading  provider of software  and system  solutions  for the
wireless  industry.  The Company's products include systems for fraud prevention
and churn reduction, customer care and billing, and location service.

      On June 23, 1998, Corsair acquired  Subscriber  Computing,  Inc. ("SCI" or
"Subscriber"),  a Delaware  corporation,  which provides software systems to the
paging, cellular, and PCS industries. The merger was accomplished pursuant to an
Agreement  and Plan of  Reorganization,  dated April 2, 1998. As a result of the
merger,  each outstanding share of SCI Preferred Stock was converted into shares
of SCI Common Stock based on a ratio determined using the respective liquidation
preferences  of the  various  series  of  preferred  stock.  Concurrently,  each
outstanding  share of SCI  Common  Stock  was  converted  into  0.238  shares of
Corsair's Common Stock, and SCI became a wholly owned subsidiary of Corsair. The
acquisition  of SCI  was  treated  as a  pooling  of  interests  for  accounting
purposes.

      A total of approximately 3.9 million shares of Corsair's Common Stock were
issued in connection with the merger. In addition,  all outstanding  options and
warrants to purchase SCI common stock were assumed by Corsair and converted into
the respective rights to purchase shares of Corsair's Common Stock.  Corsair has
reserved  approximately 464,500 shares of its Common Stock for issuance upon the
exercise of the assumed SCI stock options and warrants.

      With the  acquisition  of SCI,  Corsair  acquired  two  billing  products:
Customer Resource  Manager(TM)  ("CRM") and PrePay(TM).  CRM is a full featured,
integrated customer service and real-time billing system for wireless and paging
carriers,  available on a scalable desktop platform. CRM is currently one of the
most widely used  billing and  customer  care  systems in the  worldwide  paging
industry.  PrePay is a system for prepaid billing, based on wireless intelligent
network technology, that allows carriers to provide cellular and PCS services to
new  consumer  and  business  market  segments.   Corsair  also  acquired  SCI's
FraudWatch(R)  Pro, a profiling  system designed to detect fraud on all types of
wireless telephone networks.

Results of Operations

      Revenues:  For the three months ended  September 30, 1998,  total revenues
were $12.0 million, compared with $15.6 million for the same period in 1997. The
decrease in revenues for the three months ended September 30, 1998 was primarily
due to lengthened sales cycles in foreign markets,  believed to be caused by the
troubled overseas economies. For the nine months ended September 30, 1998, total
revenues  were  $49.9  million,  up $8.7  million  from  $41.2  million  for the
comparable  1997 period.  The  improvement in revenues for the nine months ended
September 30, 1998,  having  increased 21% from the previous period in 1997, was
primarily due to higher  software and service  revenues  resulting from a larger
installed  customer base and  recognition  of the  corresponding  consulting and
maintenance contracts. In addition,  hardware revenues for the nine month period
increased due to continuing growth in the number of PhonePrint systems sold.

      For the nine months  ended  September  30,  1998,  international  revenues
comprised 37% of total  revenues,  compared  with 18% of total  revenues for the
nine months ended September 30, 1997.

<PAGE>


      Gross Profit: Gross profit increased to 63% of total revenues in the three
months ended  September  30, 1998 from 46% of revenues in the  comparable  three
month period of 1997. For the nine months ended September 30, 1998, gross profit
was 58%, up from 34% in the same period of 1997. The increasing margins were due
primarily  to the improved  manufacturing  yields and lower  material  costs for
hardware  sales,  which  contributed  $3.0  million  and $13.7  million to gross
margins  for the  three  and  nine  month  periods  ended  September  30,  1998,
respectively.  Software  margins  contributed $2.0 million and $8.5 million from
improved product mix while Service margins of $2.7 million and $6.8 million were
the result of improved pricing on consulting  projects undertaken to support the
new license sales.

      Research and  Development:  For the three months ended September 30, 1998,
research and development  expenses were $4.7 million  compared with $3.9 million
for the same period of 1997,  an increase of $801,000 or 21%. For the first nine
months of 1998,  research and development  expenses were $13.6 million  compared
with $9.2  million for the same period of 1997,  an increase of $4.4  million or
48%. Research and development expenses were 27% and 22% of revenues for the nine
months ended September 30, 1998 and 1997, respectively. The increase in research
and development  expenses for the three and nine month periods from 1997 to 1998
was  primarily  due  to  the  increase  in  headcount  hired  to  assist  in the
development of new and continuing products.

      Sales and Marketing:  For the three months ended September 30, 1998, sales
and marketing expenses were $4.5 million compared with $3.0 million for the same
period of 1997, an increase of $1.5 million or 51%. For the first nine months of
1998, sales and marketing expenses were $12.1 million compared with $7.9 million
for the same  period of 1997,  an  increase  of $4.2  million or 54%.  Sales and
marketing  expenses  were  24% and 19% of  revenues  for the nine  months  ended
September 30, 1998 and 1997,  respectively.  Additional  sales personnel and the
incremental costs relating to additional travel and commissions costs associated
with the increased headcount caused the increase in sales and marketing expenses
from 1997 to 1998.  The  Company  expects  its sales and  marketing  expenses to
increase in absolute dollars in the foreseeable future as it continues to expand
the scope of its sales and marketing efforts.

      General and Administrative: For the three months ended September 30, 1998,
general and administrative expenses were $2.1 million compared with $2.6 million
for the same period of 1997,  a decrease of $477,000 or 19%.  For the first nine
months of 1998, general and  administrative  expenses were $6.5 million compared
with $6.8 million for the  comparable  period of 1997, a decrease of $302,000 or
4%.  General and  administrative  expenses  were 13% and 17% of revenues for the
nine months ended  September 30, 1998 and 1997,  respectively.  The decrease for
the three and nine month  periods  are due to the  consolidation  of  operations
following the merger in the second quarter of 1998.

      Merger  Related  Costs:  As  discussed  in Note 5 of  Notes  to  Condensed
Consolidated  Financial  Information,  Corsair  incurred  $4.5 million in merger
related  costs  resulting  from the  acquisition  of SCI. The  one-time  charges
included transaction costs, termination benefits for approximately 20 employees,
and redundant facility and other equipment costs associated with the merger.

      Interest Income, Net: Net interest income and expense consists of interest
income  from the  Company's  cash and  short-term  investments,  net of interest
expense on the Company's equipment loans, equipment lease lines and other loans.
The  increase  in net  interest  income  for the  three  and nine  months  ended
September  30,  1998 was a result of larger  average  cash  investment  balances
attributable to the proceeds  received from Corsair's initial public offering of
Common Stock completed in July 1997.

      Income Taxes:  The income tax expense for the nine months ended  September
30, 1998 represents a provision for estimated income taxes, while the comparable
periods in 1997 represent minimum state tax liabilities.

      Extraordinary  Item: The Company incurred losses on debt extinguishment of
$226,000 and $428,000  associated with paying the principal and interest of $4.8
million and $5.1 million of short-term  and long-term  notes payable in 1998 and
1997, respectively.
            

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Liquidity and Capital Resources

                
      Corsair  has funded its  operations  through a series of  Preferred  Stock
private placements, debt financing, and an initial public offering in July 1997.
As of September 30, 1998,  Corsair's cash and short-term  investments were $48.6
million compared with $63.0 million at December 31, 1997.

      Net cash of $8.0 million was used by operations  for the first nine months
of 1998. This was primarily due to increased levels of accounts receivables from
higher  sales volume and lower  deferred  revenue  balances  given the timing of
revenue  recognition,  offset by a  decrease  in  inventory  following  improved
customer acceptance of hardware products. Net cash of $17.3 million was provided
by investing activities,  including the net sale of short-term investments,  and
the purchase of property and equipment.  Corsair  continues to invest in capital
equipment to support its employee and facility growth, its implementation of new
management and accounting systems, and its research and development activities.

      Net cash of $4.3 million was used by financing  activities  primarily  for
the  repayment of various debt  instruments.  Corsair  maintained a $3.0 million
equipment  term loan facility at prime plus 0.75% (9.25% at September 30, 1998).
The loan  facility  was  available  through  July  1998 and was  secured  by any
underlying  equipment  purchased.  Corsair did not renew the line  following its
expiration in July 1998.

      Corsair  believes  that  existing  sources  of  liquidity  and  internally
generated  cash, if any, will be sufficient  to meet  Corsair's  projected  cash
needs  for at  least  the  next 12  months.  Corsair  intends  to  continue  its
significant  product development efforts in the future and expects to fund those
activities  out of working  capital.  There can be no assurance,  however,  that
Corsair  will not require  additional  financing  prior to such date to fund its
operations or possible acquisitions. In addition, Corsair may require additional
financing after such date to fund its operations. There can be no assurance that
any additional financing will be available to Corsair on acceptable terms, or at
all, if and when required by Corsair.

Year 2000 Issue

      The year 2000 issue  refers to the  inability  of  certain  date-sensitive
computer  chips,  software  and systems to  recognize a two-digit  date field as
belonging to the 21st Century.  Mistaking  "00" for 1900 or any other  incorrect
year could result in a system failure or miscalculations, causing disruptions to
Corsair's products or operations (including manufacturing, a temporary inability
to process  transactions  or send invoices,  or engage in other normal  business
activities).  The year 2000 issue may create  unforeseen  risks to Corsair  from
product or internal  computer  system  failures,  as well as from the failure of
third party computer systems with which it deals. Failures of Corsair's products
or computer  systems and or third party  computer  systems could have a material
adverse impact on Corsair's ability to conduct its business.

       Management has initiated an enterprise-wide  program to prepare Corsair's
computer  systems and  applications  for the year 2000 with  respect to: (1) the
portion  of  products   developed   internally  by  Corsair,   (2)  systems  and
applications  developed by third parties and incorporated in Corsair's products,
and (3) systems relied upon to conduct operations (including payroll, accounting
and cash  management).  Corsair expects to incur internal staff costs as well as
consulting  and  other  expenses  related  to   infrastructure   and  facilities
enhancements necessary to prepare the systems for the year 2000. Corsair expects
that the portion of its year 2000 date conversion project that is required to be
conducted internally will be completed on a timely basis without any significant
disruptions to its business operations.  However, there can be no assurance that
the systems of other companies on which Corsair's  products and internal systems
rely  also will be timely  converted  or that any such  failure  to  convert  by
another  company  would not have an adverse  effect on  Corsair's  products  and
internal systems.  Testing and conversion of internally  developed  hardware and
software  is  expected  to cost  approximately  $600,000  over the next year.  A
significant  portion  of these  costs is not likely to be  incremental  costs to
Corsair,  but rather will  represent the  redeployment  of existing  information
technology  resources.  Corsair  does not  expect  the  amounts  required  to be
expensed  over the next three years to have a material  effect on its  financial
position or results of operations.

            
<PAGE>

                
RISKS AND UNCERTAINTIES

      This  Quarterly  Report  may  contain  predictions,  estimates  and  other
forward-looking statements that involve risks and uncertainties.  Such risks and
uncertainties  could cause actual results to differ  materially from the results
discussed  in the  forward-looking  statements.  Factors  that  could  cause  or
contribute to such  differences  include those discussed below, as well as those
discussed elsewhere in this Quarterly Report. Corsair  Communications,  Inc. and
its  subsidiaries  ("Corsair")  undertake no obligation to release  publicly the
results of any revisions to the forward-looking  statements to reflect events or
circumstances arising after the date hereof.

      Corsair  Limited  Operating  History and Lack of Sustained  Profitability.
Corsair has only a limited history of significant  operations upon which to base
an evaluation of its business and prospects  commencing  with the first shipment
of its PhonePrint  systems in March 1995.  Since its  incorporation  Corsair has
incurred net losses $51.9 million as of September 30, 1998,  approximately $43.0
million of which was recorded since January 1995. There can be no assurance that
Corsair's  existing  revenue  levels  can be  sustained,  and past and  existing
revenue levels should not be considered  indicative of future results or growth.
Moreover,  there  can be no  assurance  that  Corsair  will be  profitable  on a
quarterly or annual basis.  Operating  results for future periods are subject to
numerous uncertainties  specified elsewhere herein.  Corsair's prospects must be
considered in light of the risks encountered by companies with limited operating
histories,  particularly  companies in new and rapidly  evolving markets such as
the  markets  in which  Corsair  now  competes  and may in the  future  compete.
Corsair's  future operating  results will depend upon, among other factors:  the
demand for PhonePrint;  Corsair's  ability to introduce  successful new products
and  product  enhancements,  including  products  that are  sold to both  analog
network  carriers  and  digital  network  carriers  such  as  PCS  and  Enhanced
Specialized  Mobile  Radio  ("ESMR")  carriers;  the level of product  and price
competition; the ability of Corsair to expand its international sales; Corsair's
success  in  expanding  distribution  channels;  the  degree  to  which  Corsair
successfully  integrates Subscriber  Computing,  Inc. and the time period during
which  integration  efforts  occur;  Corsair's  ability  to cause  the  business
conducted by Subscriber  Computing,  Inc.  ("Subscriber") to achieve and sustain
profitability;  Corsair's  success in  attracting  and  retaining  motivated and
qualified personnel; and the ability of Corsair to avoid patent and intellectual
property  litigation.  If Corsair is not successful in addressing such risks, as
well as the others set forth herein,  Corsair's business,  operating results and
financial condition will be materially adversely affected.

      Dependence  on  PhonePrint;  Dependence on Analog  Networks.  Prior to the
acquisition of Subscriber,  Corsair's  revenues were primarily  attributable  to
PhonePrint,  Corsair's cloning fraud prevention system, and Corsair  anticipates
that PhonePrint will continue to account for a significant  portion of Corsair's
revenues.  As a result,  Corsair's future  operating  results will depend on the
demand for and market  acceptance of  PhonePrint.  A relatively  small number of
analog network  carriers  constitute the potential  customers for PhonePrint.  A
large  majority  of the analog  carriers  in the largest  U.S.  markets  have to
varying degrees already implemented cloning fraud solutions, and there can be no
assurance that Corsair will be able to achieve  material  revenues from the sale
of PhonePrint to remaining  potential  customers in the U.S. Corsair anticipates
that the demand for cloning  fraud  solutions  in the U.S.  will  decline in the
future. If not offset by growth in international markets, this trend will have a
material adverse effect on Corsair's  business,  operating results and financial
condition.  Over time, this trend could also occur in international  markets. As
analog  network  carriers  adopt  cloning  fraud  solutions  for their  existing
networks, the future commercial success of PhonePrint will depend in part on the
further  expansion of analog networks by those  carriers.  If analog networks do
not continue to expand, expand slowly or expand in a manner that does not create
significant new demand for cloning fraud  solutions,  then the future demand for
PhonePrint  would be materially  adversely  affected.  There can be no assurance
that the international  market for cloning fraud solutions will grow as the U.S.
market  declines as a result of U.S.  analog  network  carriers  having  adopted
solutions to their cloning fraud  problems,  or that current or future levels of
revenues  attributable to PhonePrint will be maintained or will not decline. Any
reduction in the demand for PhonePrint  would have a material  adverse effect on
Corsair's business, operating results and financial condition.

      All of Corsair's  customers for PhonePrint to date have been carriers that
operate analog networks.  Wireless services operating in digital mode, including
PCS and ESMR in the U.S. and Global System for Mobile Communications  ("GSM") in

            

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many foreign  countries  (including  many  European  countries),  use or may use
authentication  processes that  automatically  establish the validity of a phone
each time it attempts to access the wireless telecommunications network. Corsair
is not aware of any  information  that  suggests  that cloners have been able to
break  the  authentication   encryption  technologies.   Unless  the  encryption
technologies  that form the  basis for  authentication  are  broken by  cloners,
Corsair does not believe that operators of digital  networks will purchase third
party radio frequency ("RF") fingerprinting  solutions for cloning fraud such as
PhonePrint.  In addition,  authentication processes for analog networks are also
currently available.  Corsair is also very dependent on the continued widespread
use of analog networks.  While there are currently over 40 million analog phones
in existence  in the U.S.,  industry  experts  project that the number of analog
phones will decline in the future.  Any  reduction  in demand by analog  network
carriers  for cloning  fraud  solutions  would,  or any  reduction in the use of
analog  phones  could,  have a material  adverse  effect on Corsair's  business,
operating results and financial condition.

      Dependence on Product  Introductions and Product  Enhancements.  Corsair's
future  success  depends  on  the  timely  introduction  and  acceptance  of new
products,  new versions of existing products and product enhancements.  However,
there can be no  assurance  that any new  products,  new  versions  of  existing
products or product  enhancements  Corsair attempts to develop will be developed
successfully  or on schedule,  or if  developed,  that they will achieve  market
acceptance.   In  addition,   there  can  be  no  assurance  that  Corsair  will
successfully execute its strategy of acquiring additional  businesses,  products
and  technologies  from third  parties.  In the case of products that can locate
wireless phones, the U.S. Federal Communications Commission ("FCC") has mandated
that  wireless  telecommunications  carriers be able to identify the location of
emergency  911  callers by  October  2001.  Corsair  has a  significant  product
development   effort   underway   addressing   the   need   of   U.S.   wireless
telecommunications  carriers  resulting  from the FCC  mandate.  There can be no
assurance  that the FCC mandate  will not be  abolished  or altered in a fashion
that reduces or eliminates any potential  demand for products  addressing  phone
location.  There  can  be no  assurance  that  any  wireless  telecommunications
carriers will purchase any phone location  products before the effective date of
the FCC mandate,  October 2001.  Furthermore,  Corsair has  significant  product
development   efforts  underway  aimed  at  developing  next  versions  of  CRM,
FraudWatch Pro and PrePay. Any failure to introduce commercially  successful new
products,  new  versions of existing  products  or product  enhancements  or any
significant  delay in the  introduction  of such new  products,  new versions of
existing products or product  enhancements  would have a material adverse effect
on Corsair's business, operating results and financial condition.

      The process of developing new products,  new versions of existing products
and product enhancements for use in the wireless  telecommunications industry is
extremely  complex and is expected to become more  complex and  expensive in the
future as new platforms and technologies emerge. In particular, Corsair is aware
of significant  technical  challenges with respect to the phone location product
it is currently  attempting  to develop.  In the past,  Corsair has  experienced
delays in the introduction of certain product enhancements,  and there can be no
assurance  that new  products,  new  versions  of  existing  products or product
enhancements  will be introduced  on schedule or at all. Any new  products,  new
versions of existing  products or product  enhancements may also contain defects
when  first  introduced  or when new  versions  are  released.  There  can be no
assurance that, despite testing,  defects will not be found in new products, new
versions of existing  products or product  enhancements  after  commencement  of
commercial  shipments,  resulting in loss of or delay in market acceptance.  Any
loss of or delay in market  acceptance  would have a material  adverse effect on
Corsair's business, operating results and financial condition.

      Fluctuations in Quarterly Financial Results;  Lengthy Sales Cycle. Corsair
has experienced significant  fluctuations in revenues and operating results from
quarter to quarter  due to a  combination  of factors  and  expects  significant
fluctuations  to continue in future  periods.  Factors  that are likely to cause
Corsair's  revenues and operating results to vary  significantly from quarter to
quarter include,  among others: the level and timing of revenues associated with
PhonePrint;  the timing of the  introduction  or  acceptance of new products and
services  and  product  enhancements  offered  by Corsair  and its  competitors;
changes  in  governmental   regulations  or  mandates   affecting  the  wireless
telecommunications  industry;  technological  changes  or  developments  in  the
wireless  telecommunications  industry;  the  size,  product  mix and  timing of
significant orders; the timing of system revenue; competition and pricing in the
markets in which  Corsair  competes;  the degree to which  Corsair  successfully
integrates  Subscriber  and the time period  during  which  integration  efforts

            

<PAGE>

                
occur;  Corsair's  ability to cause the  business  conducted  by  Subscriber  to
achieve and sustain  profitability;  possible  recalls;  lengthy  sales  cycles;
production or quality problems; the timing of development expenditures;  further
expansion  of  sales  and  marketing  operations;  changes  in  material  costs;
disruptions in sources of supply;  capital  spending;  the timing of payments by
customers; potential reduction in demand in the international markets because of
economic  or  political  conditions  in those  countries  and changes in general
economic  conditions.  These and other  factors could cause Corsair to recognize
relatively  large amounts of revenue over a very short period of time,  followed
by a period during which relatively little revenue is recognized. Because of the
relatively  fixed nature of most of Corsair's  costs,  including  personnel  and
facilities costs, any  unanticipated  shortfall in revenues in any quarter would
have a material  adverse impact on Corsair's  operating  results in that quarter
and would likely  result in  substantial  adverse  fluctuations  in the price of
Corsair's Common Stock. Accordingly,  Corsair expects that from time to time its
future  operating  results will be below the expectations of market analysts and
investors,  which would likely have a material  adverse effect on the prevailing
market price of Corsair Common Stock.

      A carrier's  decision to deploy  PhonePrint and other products  offered by
Corsair  typically  involves a significant  commitment of capital by the carrier
and approval by its senior management. Consequently, the timing of purchases are
subject to  uncertainties  and delays  frequently  associated  with  significant
capital  expenditures,  and Corsair is not able to  accurately  forecast  future
sales of  PhonePrint  or any of its other  products.  In addition,  purchases of
PhonePrint and certain of Corsair's other products involve testing, integration,
implementation and support requirements.  For these and other reasons, the sales
cycle  associated  with the purchase of PhonePrint and Corsair's  other products
typically  ranges  from three to 18 months and are  subject to a number of risks
over which Corsair has little  control,  including  the carrier's  budgetary and
capital  spending  constraints  and  internal   decision-making   processes.  In
addition,  a  carrier's  purchase  decision  may  be  delayed  as  a  result  of
announcements by Corsair or competitors of new products or product  enhancements
or by  regulatory  developments.  Corsair  expects  that there will be a lengthy
sales  cycle with  respect  to new  products,  if any,  that it may offer in the
future.  Because of this lengthy sales cycle and the relatively  large size of a
typical order and because Corsair does not recognize revenue on PhonePrint sales
upon shipment if a sales agreement  contemplates  that Corsair provide  testing,
integration or implementation  services or contains other contractual acceptance
criteria,  if revenues  forecasted  from a specific  customer  for a  particular
quarter are not realized in that quarter,  Corsair's  operating results for that
quarter could be materially and adversely affected.

      Risks Associated with International  Markets.  In an effort to offset what
Corsair  expects  will  be  declining  demand  in the  U.S.  for  cloning  fraud
solutions,  Corsair  intends to devote  significant  marketing and sales efforts
over the next several years to increase its sales of PhonePrint, CRM, FraudWatch
Pro, PrePay and IMR to international customers.  This expansion of sales efforts
outside of the U.S. will require significant  management attention and financial
resources.  Corsair  expects that sales  outside of the U.S.  will account for a
significant  portion of the revenues  Corsair derives from CRM,  FraudWatch Pro,
PrePay and IMR.  There can be no assurance  that Corsair will be  successful  in
achieving  significant  sales of PhonePrint and other products in  international
markets.  Corsair does not expect to sell  PhonePrint in the many  international
markets  that rely  primarily  on  digital  wireless  networks,  including  many
European countries. There may not be demand in foreign countries with respect to
new products, if any, that Corsair may offer. For example,  Corsair is currently
developing  a  product   addressing   the  U.S.   FCC  mandate   that   wireless
telecommunications  carriers be able to identify the  location of emergency  911
callers by October 2001.  Corsair is not aware of any  corresponding  regulatory
requirement in any foreign country.

      Corsair's  international  sales  may be  denominated  in  foreign  or U.S.
currencies.  Corsair  does not  currently  engage in  foreign  currency  hedging
transactions.  As a  result,  a  decrease  in the  value of  foreign  currencies
relative to the U.S. dollar could result in losses from transactions denominated
in foreign  currencies.  With respect to Corsair's  international sales that are
U.S.  dollar-denominated,  such a decrease  could make  Corsair's  products less
price-competitive. Also, there can be no assurance that the current state of the
Asian and South  American  economies will not cause  Corsair's  sales revenue to
decline.   Additional  risks  inherent  in  Corsair's   international   business
activities  include changes in regulatory  requirements,  the costs and risks of
localizing and supporting systems and software in foreign countries, tariffs and
other trade barriers, political and economic instability, reduced protection for
intellectual property rights in certain countries,  difficulties in staffing and
managing foreign operations, difficulties in managing distributors,  potentially
adverse tax consequences,  foreign currency exchange fluctuations, the burden of
complying  with a wide  variety of complex  foreign  laws and  treaties  and the
possibility of difficulty in accounts  receivable  collections.  Product service
and support is generally more complicated and expensive with respect to products

            

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sold in international markets. Corsair may need to adapt its products to conform
to different  technical  standards that may exist in foreign  countries.  Future
customer  purchase  agreements may be governed by foreign laws, which may differ
significantly from U.S. laws.  Therefore,  Corsair may be limited in its ability
to enforce its rights under such agreements and to collect damages,  if awarded.
There can be no  assurance  that any of these  factors  will not have a material
adverse effect on Corsair's business, operating results and financial condition.

      Integration of Recent Acquisition. Corsair recently acquired Subscriber by
merging  a  subsidiary  with  Subscriber.  As a  result,  Corsair  will  now  be
significantly  more  complex and diverse  than it was prior to the  acquisition.
Following this acquisition,  to achieve optimal synergies,  Corsair will need to
successfully   integrate  and  streamline   overlapping  functions  and  control
expenditures  resulting from its respective  business operations located in Palo
Alto and Irvine,  California. In addition,  Corsair must now integrate different
systems and procedures in certain areas of  operations.  The effort to reconcile
systems  and  procedures  required  and the impact of success or failure  may be
material.  There can be no  assurance  that the process of  integrating  the two
companies can be effectively  managed to achieve desired  results.  Any delay or
failure in integrating the two companies could have a material adverse effect on
Corsair's business, operating results and financial condition.

      Potential  Acquisitions.  Corsair has in the past evaluated and expects in
the future to pursue  acquisitions of businesses,  products or technologies that
complement Corsair's business. Future acquisitions may result in the potentially
dilutive  issuance  of  equity  securities,  the  use  of  cash  resources,  the
incurrence  of  additional  debt,  the  write-off  of  in-process  research  and
development or software  acquisition and development  costs and the amortization
of expenses related to goodwill and other intangible  assets, any of which could
have a material  adverse  effect on Corsair's  business,  operating  results and
financial  condition.  Future  acquisitions  would involve  numerous  additional
risks, including  difficulties in the assimilation of the operations,  services,
products and personnel of an acquired  business,  the diversion of  management's
attention from other business  concerns,  entering  markets in which Corsair has
little or no direct prior  experience and the potential loss of key employees of
an acquired business. In addition,  there can be no assurance that Corsair would
be successful in completing any acquisition. Corsair does not currently have any
agreement or understanding with regard to any acquisition.

      Highly Competitive Industry. The market for products and services provided
to wireless  telecommunications  carriers is highly  competitive  and subject to
rapid  technological  change,  regulatory  developments  and  emerging  industry
standards.  In addition, many wireless  telecommunications  carriers and vendors
may be capable of developing and offering products and services competitive with
new  products,  if any,  that  Corsair  may offer in the  future.  Trends in the
wireless  telecommunications   industry,  including  greater  consolidation  and
technological or other developments that make it simpler or more  cost-effective
for wireless  telecommunications carriers to provide certain services themselves
could affect demand for new products, if any, offered by Corsair, and could make
it more  difficult  for  Corsair  to  offer a  cost-effective  alternative  to a
wireless  telecommunications  carrier's own capabilities.  Corsair is aware of a
number of  companies  that have either  announced an intention to develop or are
capable of developing  products that would compete with the products  Corsair is
developing,  and Corsair  anticipates  the  entrance of new  competitors  in the
wireless  telecommunications  carrier service industry in the future.  Corsair's
ability to sell new  products,  if any,  may be hampered by  relationships  that
competitors  have with carriers  based upon the prior sale of other  products to
carriers.

      The market for PhonePrint is intensely competitive.  Corsair believes that
the primary  competitive factors in the cloning fraud prevention market in which
it currently competes include product effectiveness and quality,  price, service
and support  capability and compatibility  with cloning fraud prevention systems
used by the carrier in other  geographic  markets and by the  carrier's  roaming
partners.  There has been a tendency for carriers  that  purchase  cloning fraud
prevention  systems to purchase  products from the company that supplies cloning
fraud prevention  systems to other carriers with whom the purchasing carrier has
a roaming  arrangement.  As a result,  Corsair expects it will be  significantly
more difficult to sell PhonePrint to a carrier if the carrier's roaming partners
use cloning fraud prevention systems supplied by a competitor. Furthermore, once
a competitor has made a sale of RF-based cloning fraud  prevention  systems to a
carrier,  Corsair  expects  that it is  unlikely  that it  would be able to sell
PhonePrint  to that  carrier  in the  same  markets  in which  the  competitor's
products have been deployed.

      Corsair's  principal  competitor  for RF-based  cloning  fraud  prevention
systems is Cellular Technical Services Company, Inc. ("CTS"). CTS has agreements
pursuant to which it has  installed or will install its RF-based  cloning  fraud

            

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prevention  system in many major U.S.  markets.  PhonePrint also competes with a
number of alternative technologies, including profilers, personal identification
numbers and authentication.  Corsair is aware of numerous  companies,  including
GTE  Telecommunications   Services,  Inc.  ("GTE"),   Authentix  Network,  Inc.,
Lightbridge,  Inc. ("Lightbridge"),  Systems/Link Corporation  ("Systems/Link"),
International  Business Machines Corporation ("IBM") and Digital Equipment Corp.
("DEC")  that  currently  are or are  expected to offer  products in the cloning
fraud prevention area. In addition, carriers may themselves develop technologies
that limit the demand for  PhonePrint.  There can be no assurance  that any such
company or any other  competitor  will not  introduce  a new  product at a lower
price or with greater functionality than PhonePrint. Furthermore, the demand for
PhonePrint would be materially adversely affected if wireless telecommunications
carriers  implement  authentication  technology  applicable  to analog phones as
their  sole  cloning  fraud  solution  in  major  markets,   if  U.S.   wireless
telecommunications  carriers adopt a uniform  digital  standard that reduces the
need for digital  phones to operate in analog mode while  roaming,  or if analog
phone makers change product designs and/or improve manufacturing  standards to a
point where the difference  from phone to phone in the radiowave form becomes so
small that it is difficult  for  PhonePrint  to identify a clone.  Any currently
available  alternative  technology or any new  technology  may render  Corsair's
products obsolete or significantly  reduce the market share afforded to RF-based
cloning fraud prevention systems like PhonePrint.

      The markets for CRM,  FraudWatch  Pro,  PrePay and IMR are  intensely  and
increasingly competitive,  subject to rapid change and significantly affected by
new product introductions and other market activities of industry  participants.
A large number of companies  currently  offer one or more  products that compete
directly with CRM, FraudWatch Pro, PrePay and IMR. For example, Corsair competes
directly with In-Touch Management  Systems,  Inc. and Keenan Systems Corporation
in  paging  billing   systems;   with  AG   Communications   Systems,   National
Telemanagement  Corporation,  Systems/Link,  GTE, Glenayre  Technologies,  Inc.,
Brite Voice  Systems,  Inc. and Boston  Communications  Group,  Inc. for prepaid
billing;  with GTE, Lightbridge,  Systems/Link,  IBM, DEC and Hewlett-Packard in
real time fraud  profiler  systems;  with Metapath  Software  Corp. and ACE*Comm
Corporation for mediation systems;  and with Daleen  Technologies,  Inc., Keenan
Systems Corporation, Sema Group Telecoms, Inc., LHS Group, Inc. and AMDOCS, Inc.
for its suite billing products.  Corsair also competes with companies offering a
breadth of software knowledge  applicable to a variety of industries,  including
communications  businesses.  Such  companies  include  Andersen  Consulting  and
Electronic  Data  Systems   Corporation.   Several  of  these  competitors  have
significantly  greater  financial,  technical,  marketing  and other  resources,
significantly  greater name recognition and a larger installed base of customers
than  Corsair.  As a result,  Corsair's  competitors  may be able to adapt  more
quickly to new or emerging  technologies and changes in subscriber  requirements
or may be able to devote  greater  resources to the  promotion and sale of their
products and services.

      Corsair believes that its ability to compete in the future depends in part
on a number of competitive factors outside its control, including the ability to
hire and retain  employees,  the  development by others of products and services
that are competitive  with Corsair's  products and services,  the price at which
others offer comparable products and services and the extent of its competitors'
responsiveness  to customer needs.  Many of Corsair's  competitors and potential
competitors have significantly greater financial, marketing, technical and other
competitive resources than Corsair's. As a result,  Corsair's competitors may be
able to adapt  more  quickly  to new or  emerging  technologies  and  changes in
customer  requirements  or  may be  able  to  devote  greater  resources  to the
promotion and sale of their products and services.  To remain competitive in the
market for products and services sold to wireless  telecommunications  carriers,
Corsair will need to continue to invest  substantial  resources in  engineering,
research and development and sales and marketing. There can be no assurance that
Corsair will have sufficient  resources to make such investments or that it will
be able to make the  technological  advances  necessary  to remain  competitive.
Accordingly,  there can be no  assurance  that  Corsair  will be able to compete
successfully with respect to new products, if any, it offers in the future.

      Customer  Concentration.  To date, a very significant portion of Corsair's
revenues in any particular  period has been  attributable to a limited number of
customers.  GTE  Wireless,  Inc.,  BellSouth  Cellular  Corporation,  and Groupo
Iusacell,  S.A. De C.V.,  each accounted for greater than 10% of Corsair's total
revenues  for the  nine  months  ended  September  30,  1998,  and  collectively
accounted  for over 48% of Corsair's  total  revenues  for the same period.  Any
failure to capture a significant  share of those customers could have a material
adverse effect on Corsair's business, operating results and financial condition.
Corsair  expects  a  relatively  small  number of  customers  will  continue  to

            

<PAGE>

                
represent a significant  percentage  of its total  revenues for each quarter for
the  foreseeable  future,  although  the  companies  that  comprise  the largest
customers in any given quarter may change from quarter to quarter.  The terms of
Corsair's  agreements with its PhonePrint customers are generally for periods of
between two and five years.  Although these agreements  typically contain annual
software license fees and various service and support fees, there are no minimum
payment  obligations or  obligations to make future  purchases of hardware or to
license  additional  software.  The terms of Corsair's  agreements for its other
products  do not contain  obligations  for the  customer to purchase  additional
products.  Therefore,  there can be no assurance  that any of Corsair's  current
customers will generate significant revenues in future periods.

      Uncertainty  Regarding  Patents and Protection of Proprietary  Technology;
Risks of Future  Litigation.  Corsair relies on a combination  of patent,  trade
secret,  copyright  and trademark  protection  and  nondisclosure  agreements to
protect its proprietary  rights.  Corsair's success will depend in large part on
its ability to obtain patent protection,  defend patents once obtained,  license
third party  proprietary  rights,  maintain  trade  secrets and operate  without
infringing  upon the  patents  and  proprietary  rights of  others.  The  patent
positions of companies in the wireless telecommunications industry are generally
uncertain  and  involve  complex  legal and factual  questions.  There can be no
assurance that patents will issue from any patent applications owned or licensed
or that, if patents do issue, the claims allowed would be sufficiently  broad to
protect the applicable technology.  In addition,  there can be no assurance that
any issued  patents owned or licensed  will not be  challenged,  invalidated  or
circumvented,  or that the rights granted  thereunder  will provide  competitive
advantages.  Furthermore,  the laws of certain  countries in which Corsair sells
its respective products do not protect software and intellectual property rights
to the same extent as do the laws of the U.S.

      Patents issued and patent  applications filed relating to products used in
the  wireless  telecommunications  industry  are  numerous  and  there can be no
assurance  that current and potential  competitors  and other third parties have
not filed or in the future will not file  applications for, or have not received
or in the future  will not  receive,  patents or obtain  additional  proprietary
rights  relating to products used or proposed to be used by Corsair.  Corsair is
aware of patents  granted to third  parties  that relate to  potential  products
currently  being  developed.  Corsair will need to either design those potential
products in a manner that does not  infringe the  third-party  patents or obtain
licenses from the third parties, and there can be no assurance that Corsair will
be able to do so. There can be no assurance that Corsair is aware of all patents
or patent  applications  that may materially  affect its ability to make, use or
sell any current or future products.  U.S. patent  applications are confidential
while pending in the U.S. Patent and Trademark Office,  and patent  applications
filed in foreign  countries  are often first  published six months or more after
filing.  There can also be no  assurance  that  third  parties  will not  assert
infringement claims in the future or that any such assertions will not result in
costly  litigation  or  require  Corsair  to  obtain a license  to  intellectual
property  rights  of such  parties.  There  can be no  assurance  that  any such
licenses  would  be  available  on  terms  acceptable  to  Corsair,  if at  all.
Furthermore,  parties  making  such claims may be able to obtain  injunctive  or
other equitable relief that could  effectively  block Corsair's ability to make,
use,  sell or  otherwise  practice  its  intellectual  property  (whether or not
patented or described in pending patent applications),  or to further develop or
commercialize  its products in the U.S. and abroad and could result in the award
of  substantial  damages.  Defense of any  lawsuit or failure to obtain any such
license could have a material  adverse effect on Corsair's  business,  operating
results or financial condition.

      Corsair also relies on unpatented trade secrets to protect its proprietary
technology,  and no  assurance  can be given that others will not  independently
develop or otherwise acquire the same or substantially  equivalent  technologies
or otherwise  gain access to Corsair's  proprietary  technology or disclose such
technology or that Corsair can ultimately  protect its rights to such unpatented
proprietary  technology.  No assurance  can be given that third parties will not
obtain patent rights to such unpatented trade secrets, which patent rights could
be used to assert  infringement  claims against Corsair.  Corsair also relies on
confidentiality  agreements  with  its  employees,   vendors,   consultants  and
customers to protect  proprietary  technology.  There can be no  assurance  that
these agreements will not be breached, that there would be adequate remedies for
any  breach or that  trade  secrets  will not  otherwise  become  known to or be
independently developed by competitors. Failure to obtain or maintain patent and
trade secret protection, for any reason, could have a material adverse effect on
Corsair's business,  operating results and financial  condition.  Moreover,  the
laws of certain countries in which Corsair sells its respective  products do not
protect software and  intellectual  property rights to the same extent as do the
laws of the U.S.  Unauthorized  copying  or  misuse  of  products  could  have a
material adverse effect on Corsair's  business,  operating results and financial
condition.
            

<PAGE>

                
      Dependence on Third-Party  Products and Services;  Sole or Limited Sources
of  Supply.  Corsair  relies to a  substantial  extent  on  outside  vendors  to
manufacture  many  of the  components  and  subassemblies  used  in  many of its
products,  including  PhonePrint,  some of  which  are  obtained  from a  single
supplier or a limited group of suppliers.  Corsair's reliance on outside vendors
generally,  and a sole or a limited group of suppliers in  particular,  involves
several risks,  including a potential  inability to obtain an adequate supply of
required  components  and reduced  control over  quality,  pricing and timing of
delivery of components. In the past, Corsair has experienced delays in receiving
materials  from  vendors,  sometimes  resulting  in  delays in the  assembly  of
products by Corsair.  Such delays, or other significant vendor or supply quality
issues, may occur in the future, which could result in a material adverse effect
on Corsair's business, operating results or financial condition. The manufacture
of certain of these  components and  subassemblies  is specialized  and requires
long lead times,  and there can be no assurance that delays or shortages  caused
by vendors will not reoccur. Any inability to obtain adequate deliveries, or any
other  circumstance  that would require Corsair to seek  alternative  sources of
supply or to manufacture such components  internally could delay the shipment of
products,  increase  cost of goods  sold and have a material  adverse  effect on
Corsair's business, operating results and financial condition. In addition, from
time to time, Corsair must also rely upon third parties to develop and introduce
components and products to enable Corsair,  in turn, to develop new products and
product  enhancements  on a timely  and  cost-effective  basis.  There can be no
assurance  that  Corsair  will be able to obtain  access  in a timely  manner to
third-party  products and  development  services  necessary to enable Corsair to
develop and  introduce  new and  enhanced  products,  that  Corsair  will obtain
third-party products and development  services on commercially  reasonable terms
or that Corsair will be able to replace  third-party  products in the event such
products become  unavailable,  obsolete or incompatible  with future versions of
Corsair's products. The absence of, or any significant delay in, the replacement
of  third-party  products  could have a  material  adverse  effect on  Corsair's
business, operating results and financial condition.

      Dependence on Personnel.  The success of Corsair is dependent, in part, on
its ability to attract and retain highly qualified  personnel.  Corsair's future
business and operating  results depend upon the continued  contributions  of its
senior  management  and other  employees,  many of whom  would be  difficult  to
replace and certain of whom perform  important  functions beyond those functions
suggested by their respective job titles or  descriptions.  Competition for such
personnel is intense and the inability to attract and retain  additional  senior
management  and other  employees or the loss of one or more members of Corsair's
senior management team or current employees,  particularly to competitors, could
materially  adversely affect Corsair's business,  operating results or financial
condition.  There can be no assurance  that Corsair will be successful in hiring
or retaining requisite  personnel.  None of Corsair's employees has entered into
employment  agreements  with Corsair,  and Corsair does not have any  key-person
life insurance covering the lives of any members of its senior management team.

      Management of Growth.  Corsair has rapidly and significantly  expanded its
operations  over the past few years.  The number of Corsair  employees has grown
from 193 on December  31, 1995 to 268 on  September  30,  1998.  Such growth has
placed,  and,  if  sustained,  will  continue to place,  significant  demands on
management,   information   systems,   operations  and  resources.   The  strain
experienced  to date has chiefly  been in hiring,  integrating  and  effectively
managing  sufficient numbers of qualified  personnel to support the expansion of
Corsair's  business.  Corsair's  ability to manage any future growth,  should it
occur,  will  continue to depend  upon the  successful  expansion  of its sales,
marketing,  research  and  development,   customer  support  and  administrative
infrastructure  and the ongoing  implementation  and improvement of a variety of
internal management systems,  procedures and controls. There can be no assurance
that Corsair will be able to attract,  manage and retain additional personnel to
support any future growth, if any, or will not experience  significant  problems
with respect to any infrastructure  expansion or the attempted implementation of
systems,  procedures  and  controls.  Any  failure in one or more of these areas
could  have  a  material  adverse  effect  on  Corsair's  business,  results  of
operations and financial condition.

      Government  Regulation  and Legal  Uncertainties.  While most of Corsair's
operations  are not directly  regulated,  existing and  potential  customers are
subject  to a  variety  of  U.S.  and  foreign  governmental  regulations.  Such
regulations may adversely affect the wireless telecommunications industry, limit
the number of potential  customers  for Corsair's  products or impede  Corsair's
ability  to  offer   competitive   products   and   services  to  the   wireless
telecommunications  industry  or  otherwise  have a material  adverse  effect on

            

<PAGE>

                
Corsair's  business,  financial  condition and results of  operations.  Recently
enacted  legislation,   including  the  Telecommunications  Act  of  1996,  that
deregulates  the  telecommunications  industry may cause changes in the wireless
telecommunications  industry,  including  the  entrance of new  competitors  and
industry  consolidation,  which  could in turn  increase  pricing  pressures  on
Corsair,  decrease  demand for Corsair's  products,  increase  Corsair's cost of
doing  business  or  otherwise  have a  material  adverse  effect  on  Corsair's
business,  operating results and financial condition. The Telecommunications Act
of 1996 contains several provisions that may bear directly on Corsair's existing
and potential customers in the U.S.,  including provisions that require wireless
carriers to  interconnect  with local  exchange  carriers  and  contribute  to a
universal service fund, that limit the ability of state and local governments to
discriminate  against or prohibit certain  wireless  services and that may allow
certain  companies  to bundle local and long  distance  services  with  wireless
offerings.  These  provisions  may cause an  increase  in the number of wireless
telecommunications carriers which could in turn increase the number of potential
customers of Corsair. This could require Corsair to expand its marketing efforts
with no  assurance  that  revenues  would  increase  proportionately  or at all.
Alternatively,  these provisions could encourage industry  consolidation,  which
would reduce  Corsair's  potential  customer  base.  Currently the FCC and state
authorities are  implementing  the provisions of the  Telecommunications  Act of
1996 and several of the decisions by the FCC and state  authorities  are already
being  challenged in court.  Therefore,  Corsair cannot at this time predict the
extent to which the  Telecommunications  Act of 1996 will affect its current and
potential customers or ultimately affect Corsair's business, financial condition
or  results  of  operations.  If  the  recent  trend  toward  privatization  and
deregulation  of the wireless  telecommunications  industry  outside of the U.S.
were to discontinue,  or if currently deregulated  international markets were to
reinstate  comprehensive  government  regulation of wireless  telecommunications
services, Corsair's business, operating results and financial condition could be
materially and adversely affected.

      Dependence on Growth of Wireless  Telecommunications  Industry.  Corsair's
future  financial  performance  will  depend in part on the  number of  carriers
seeking third-party solutions. Although the wireless telecommunications industry
has experienced  significant  growth in recent years,  there can be no assurance
that such growth will continue at similar  rates,  or that, if the industry does
grow,  there will be continued  demand for the cloning fraud prevention or other
products.  Any decline in demand for  wireless  telecommunications  products and
services in general would have a material adverse effect on Corsair's  business,
operating results and financial condition.

      Risk of System  Failure.  The  continued,  uninterrupted  operation of the
PhonePrint  system  depends on protecting it from damage from fire,  earthquake,
power loss,  communications  failure,  unauthorized  entry or other events.  Any
damage to or failure of a component or combination  of components  that causes a
significant  reduction in the  performance  of a PhonePrint  system could have a
material adverse effect on Corsair's  business,  operating results and financial
condition.  Corsair  currently  does not have  liability  insurance  to  protect
against these risks and there can be no assurance  that such  insurance  will be
available to Corsair on commercially  reasonable  terms, or at all. In addition,
if any  carrier  using  PhonePrint  encounters  material  performance  problems,
Corsair's reputation and its business, operating results and financial condition
could be materially adversely affected.

      Risk of Product Defects.  Software products such as CRM, FraudWatchPro and
PrePay frequently  contain errors or failures,  especially when first introduced
or when new versions are released.  Corsair could, in the future,  lose revenues
as a result of software errors or defects.  Corsair's  products are intended for
use in sales  applications that may be critical to a customer's  business.  As a
result,  Corsair  expects that its  customers  and  potential  customers  have a
greater  sensitivity  to product  defects than the market for software  products
generally.  There can be no assurance  that,  despite  testing by Corsair and by
current and  potential  customers,  errors will not be found in new  products or
releases  after  commencement  of  commercial  shipments,  resulting  in loss of
revenue  or delay in market  acceptance,  diversion  of  development  resources,
damage to Corsair's reputation,  or increased service and warranty costs, any of
which could have a material  adverse  effect on  Corsair's  business,  operating
results and financial condition.

      Year  2000  Compliance.  Corsair's  products  use and are  dependent  upon
certain  internally  developed and third party  software  programs.  Corsair has
initiated a review and  assessment  of all  hardware  and  software  used in its

            

<PAGE>

                
respective  products  to confirm  that they will  function  properly in the year
2000.  With  respect  to  software  developed  internally,  the  results of that
evaluation  to date  have  revealed  certain  source  codes  that are  unable to
appropriately  interpret the upcoming calendar year 2000, and Corsair is working
diligently  to  upgrade  programs  to  make  them  capable  of  processing  data
incorporating  year 2000 dates without  material errors or  interruptions.  With
respect to third party  software  incorporated  in products,  all vendors  whose
software is  incorporated in PhonePrint have indicated that their software is or
will be year 2000 compliant.  Evaluation of year 2000 issues is continuing,  and
there  can be no  assurance  that  additional  issues,  not  presently  known to
Corsair,  will not be  discovered  which  could  present a material  risk to the
function of Corsair's  products and have a material  adverse effect on Corsair's
business, operating results and financial condition.

      Dependence on  Distributors.  PhonePrint is currently  marketed  primarily
through  Corsair's direct sales efforts.  Corsair has entered into  distribution
and similar agreements with respect to PhonePrint with Motorola,  Inc., Ericsson
Radio Systems AB ("Ericsson") and Aurora Wireless Technologies,  Ltd. ("Aurora")
and sales referral  agreements  with Lucent  Technologies,  Inc.  ("Lucent") and
Sumitomo   Corporation  of  America.   Corsair  has  entered  into  distribution
agreements  with a number of  distributors  with respect to certain of its other
products,   including  Ericsson,  Daewoo  Information  Systems  Company,  Groupe
Bull-Integris and Aurora. In addition,  Corsair has relationships  with a number
of third party integrators and may rely on these integrators to a greater extent
in the future.  Corsair seeks to pursue distribution  agreements and other forms
of sales and marketing  arrangements  with other companies and Corsair  believes
that its  dependence  on  distributors  and  these  other  sales  and  marketing
relationships  will increase in the future,  both with respect to PhonePrint and
to  other  products.  Generally,  there  are  no  minimum  purchase  obligations
applicable to any existing distributor or other sales and marketing partners and
Corsair does not expect to have any guarantees of continuing  orders.  There can
be no  assurance  that any  existing or future  distributors  or other sales and
marketing  partners  will not  become  competitors  of Corsair  with  respect to
current  products or any future product.  Any failure by Corsair's  existing and
future   distributors  or  other  sales  and  marketing   partners  to  generate
significant revenues could have a material adverse effect on Corsair's business,
operating results and financial condition.

      Future Capital  Requirements.  Corsair's future capital  requirements will
depend upon many factors,  including the  commercial  success of PhonePrint  and
Corsair's other products,  the timing and success of new product  introductions,
if any, the progress of Corsair's research and development  efforts, its results
of operations,  the status of competitive products,  the degree to which Corsair
successfully  integrates Subscriber and the time period during which integration
efforts occur,  Corsair's ability to cause the business  conducted by Subscriber
to  achieve  and  sustain  profitability,   and  the  potential  acquisition  of
businesses, technologies or assets. Corsair believes the combination of existing
sources of liquidity and  internally  generated  cash will be sufficient to meet
Corsair's projected cash needs for at least the next 12 months.  There can be no
assurance,  however, that Corsair will not require additional financing prior to
such date to fund its operations.  In addition,  Corsair may require  additional
financing after such date to fund its operations. There can be no assurance that
any additional financing will be available to Corsair on acceptable terms, or at
all, when required. If additional funds are raised by issuing equity securities,
further dilution to the existing stockholders will result. If adequate funds are
not available,  Corsair may be required to delay, scale back or eliminate one or
more of its  development  or  manufacturing  programs  or obtain  funds  through
arrangements with third parties that may require Corsair to relinquish rights to
certain of its  technologies or potential  products or other assets that Corsair
would not  otherwise  relinquish.  Accordingly,  the  inability  to obtain  such
financing could have a material adverse effect on Corsair's business,  operating
results and financial condition.

      Volatility of Stock Price.  The market price of Corsair's  Common Stock is
likely to be  highly  volatile  and could be  subject  to wide  fluctuations  in
response  to  numerous  factors,   including,   but  not  limited  to,  revenues
attributable  to PhonePrint and Corsair's  other  products,  new products or new

            

<PAGE>

                
contracts by Corsair or its  competitors,  actual or  anticipated  variations in
operating  results,  the  level of  operating  expenses,  changes  in  financial
estimates   by   securities   analysts,   potential   acquisitions,   regulatory
announcements,  developments  with  respect to patents  or  proprietary  rights,
conditions and trends in the wireless  telecommunications  and other industries,
adoption  of new  accounting  standards  affecting  the  industry,  economic  or
political  conditions in foreign countries and general market  conditions.  As a
result,  Corsair expects that from time to time future operating results will be
below the expectations of market analysts and investors, which would likely have
a material  adverse  effect on the  prevailing  market  price of Corsair  Common
Stock.  The  realization  of any of the  risks  described  in these  "Risks  and
Uncertainties"  could have a dramatic and adverse  impact on the market price of
Corsair Common Stock.

      Further,  the stock  market  has  experienced  extreme  price  and  volume
fluctuations  that  have  particularly  affected  the  market  prices  of equity
securities of many companies in the  telecommunications  industry and that often
have been  unrelated or  disproportionate  to the operating  performance of such
companies. These market fluctuations, as well as general economic, political and
market conditions such as recessions or international  currency fluctuations may
adversely  affect  the  market  price of  Corsair  Common  Stock.  In the  past,
following  periods  of  volatility  in the  market  price of the  securities  of
companies in the telecommunications industry, securities class action litigation
has  often  been  instituted  against  those  companies.   Such  litigation,  if
instituted against Corsair, could result in substantial costs and a diversion of
management  attention and resources,  which would have a material adverse effect
on Corsair's business, operating results and financial conditions.

      Antitakeover  Effects of  Charter,  Bylaws  and  Delaware  Law.  Corsair's
Restated  Certificate  of  Incorporation  authorizes  the Corsair Board to issue
shares of  undesignated  Preferred  Stock without  stockholder  approval on such
terms as the Board may  determine.  The rights of the holders of Corsair  Common
Stock will be subject to, and may be  adversely  affected  by, the rights of the
holders of any such Preferred Stock that may be issued in the future.  Moreover,
the  issuance of such  Preferred  Stock may make it more  difficult  for a third
party to acquire, or may discourage a third party from acquiring,  a majority of
the voting stock of Corsair.  Corsair's  Restated  Bylaws  provide for Corsair's
Board to be  classified  into three classes of  directors.  With the  classified
Board,  one class of directors  is elected  each year with each class  serving a
three-year  term.  These and other  provisions  of the Restated  Certificate  of
Incorporation and the Restated Bylaws, as well as certain provisions of Delaware
law,  could delay or impede the removal of  incumbent  directors  and could make
more difficult a merger,  tender offer or proxy contest involving Corsair,  even
if such events could be  beneficial  to the interest of the  stockholders.  Such
provisions could limit the price that certain  investors might be willing to pay
in the future for Corsair Common Stock.
            

PART II - OTHER INFORMATION

                
Item 2. Change in Securities and Use of Proceeds

      From the effective  date of Corsair's  initial  registration  statement on
Form S-1 on July 29, 1997  (Registration  No.  333-28519) to September 30, 1998,
the  approximate  use of the net offering  proceeds  were $12.9  million for the
repayment  of  indebtedness,  $6.7  million for capital  expenditures,  and $1.9
million for acquisition  costs paid through June 30, 1998. The remaining balance
from  the net  proceeds  of $39.1  million  have  been  invested  in  short-term
investments,  pending future use. All payments were direct or indirect  payments
to third-parties. Item 5. Other Information.

      On  August 4,  1998,  Roland L.  Robertson  resigned  as a member of the
registrant's  board  of  directors.  Mr.  Robertson's  resignation  was  not a
result of any dispute or disagreement with the registrant.

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

      a.    Exhibits
                
            27.1  Financial Data Schedule

       b.   Reports on Form 8-K.  None
            

<PAGE>

                
                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                    Corsair Communications, Inc.


                
Date:   November 13, 1998       By:   /s/ Martin J. Silver
            

                                Martin J. Silver
                                    Chief Financial Officer and Secretary
                                      (Duly Authorized Officer and Principal
                                      Financial and Accounting Officer)



<TABLE> <S> <C>

<ARTICLE>                                            5

       
<S>                                      <C>
<PERIOD-TYPE>                                        9-MOS
<FISCAL-YEAR-END>                               DEC-31-1998
<PERIOD-START>                                  JAN-01-1998
<PERIOD-END>                                    SEP-30-1998

<CASH>                                          21,907
<SECURITIES>                                    26,667
<RECEIVABLES>                                   10,526
<ALLOWANCES>                                     1,831
<INVENTORY>                                      6,860
<CURRENT-ASSETS>                                70,490
<PP&E>                                           9,227
<DEPRECIATION>                                   1,941
<TOTAL-ASSETS>                                  79,743
<CURRENT-LIABILITIES>                           25,493
<BONDS>                                              0
                                0
                                          0
<COMMON>                                            18
<OTHER-SE>                                      52,325
<TOTAL-LIABILITY-AND-EQUITY>                    79,743
<SALES>                                         36,938
<TOTAL-REVENUES>                                49,909
<CGS>                                           14,758
<TOTAL-COSTS>                                   20,949
<OTHER-EXPENSES>                                36,741
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             (1,969)
<INCOME-PRETAX>                                (5,812)
<INCOME-TAX>                                       364
<INCOME-CONTINUING>                            (6,176)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                  (226)
<CHANGES>                                            0
<NET-INCOME>                                   (6,402)
<EPS-PRIMARY>                                   (0.36)
<EPS-DILUTED>                                   (0.36)
        

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