CORSAIR COMMUNICATIONS INC
DEFR14A, 1999-05-06
COMPUTER INTEGRATED SYSTEMS DESIGN
Previous: SPECIALTY CARE NETWORK INC, 10-K/A, 1999-05-06
Next: SOROS FUND MANAGEMENT LLC, SC 13D/A, 1999-05-06



<PAGE>   1
 
                            SCHEDULE 14A INFORMATION
                                (Rule 14a-101)
 
                  PROXY STATEMENT PURSUANT TO SECTION 14(A) OF
             THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )
 
Filed by the Registrant [X]
 
Filed by a Party other than the Registrant [ ]
 
Check the appropriate box:
 
[ ]  Preliminary Proxy Statement                
[ ]  Confidential, for Use of the Commission Only
     (as permitted by Rule 14a-6(e)(2))
[X]  Definitive Proxy Statement
[ ]  Definitive Additional Materials
[ ]  Soliciting Material Pursuant to sec.240.14a-11(c) or sec.240.14a-12
 
                          CORSAIR COMMUNICATIONS, INC.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)
 
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
[X]  No fee required.
 
[ ]  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.
 
     (1)  Title of each class of securities to which transaction applies:
 
     (2)  Aggregate number of securities to which transaction applies:
 
     (3)  Per unit price or other underlying value of transaction computed
          pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
          filing fee is calculated and state how it was determined):
 
     (4)  Proposed maximum aggregate value of transaction:
 
     (5)  Total fee paid:
 
[ ]  Fee paid previously with preliminary materials.
 
[ ]  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.
 
     (1)  Amount Previously Paid:
 
     (2)  Form, Schedule or Registration Statement No.:
 
     (3)  Filing Party:
 
     (4)  Date Filed:
<PAGE>   2
                          CORSAIR COMMUNICATIONS, INC.
                              3408 Hillview Avenue
                           Palo Alto, California 94304

                                  May 10, 1999

Dear Stockholder:

      You are cordially invited to attend the Annual Meeting of Stockholders of
Corsair Communications, Inc., which will be held at the Company's executive
offices, 3408 Hillview Avenue, Palo Alto, California on Wednesday, June 16, 1999
at 7:30 a.m.

      Details of the business to be conducted at the Annual Meeting are given in
the attached Notice of Annual Meeting of Stockholders and Proxy Statement which
you are urged to read carefully.

      If you do not plan to attend the Annual Meeting, please sign, date, and
return the enclosed proxy promptly in the accompanying reply envelope. If you
decide to attend the Annual Meeting and wish to change your proxy vote, you may
do so automatically by voting in person at the Annual Meeting.

      We look forward to seeing you on June 16, 1999.

                                       Sincerely,

                                       /s/ MARY ANN BYRNES

                                       Mary Ann Byrnes
                                       Chief Executive Officer

<PAGE>   3
                          CORSAIR COMMUNICATIONS, INC.
                              3408 Hillview Avenue
                           Palo Alto, California 94304

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

                                   TO BE HELD

                                  June 16, 1999

      The Annual  Meeting of  Stockholders  of  Corsair  Communications,  Inc.
("Corsair" or the "Company") will be held at the Company's  executive offices,
3408 Hillview Avenue,  Palo Alto,  California on Wednesday,  June 16,  1999 at
7:30 a.m. for the following purposes:

            1.    To elect two members to the Board of Directors. The Board has
                  nominated the following persons for election at the Annual
                  Meeting: Rachelle Chong and Stephen M. Dow.

            2.    To ratify the appointment of KPMG LLP as the Company's
                  independent auditors for the fiscal year ending December 31,
                  1999.

            3.    To vote upon the proposed amendments to Corsair's 1997 Stock
                  Incentive Plan to increase the authorized number of shares of
                  common stock available for issuance under such plan from
                  2,587,633 to 3,337,633 and to change the term of the options
                  granted under the Automatic Option Grant Program from 10 years
                  to 5 years with such options to be fully vested upon grant.

            4.    To vote upon the proposed amendment to Corsair's 1997 Employee
                  Stock Purchase Plan to increase the authorized number of
                  shares of Common Stock available for issuance under such plan
                  from 266,667 to 666,667.

            5.    To transact such other business which may properly come before
                  the Annual Meeting or any adjournment(s) thereof.

      The foregoing items of business are more fully described in the Proxy
Statement accompanying this Notice. All stockholders of record at the close of
business on April 30, 1999 will be entitled to vote at the Annual Meeting and at
any adjournment thereof. The transfer books will not be closed. A list of
stockholders entitled to vote at the Annual Meeting will be available for
inspection at the offices of the Company.

                                          By Order of the Board of Directors

                                          /s/ MARTIN J. SILVER

Dated:  May 10, 1999                      Martin J. Silver
                                          Secretary


ABSTENTIONS AND BROKER NONVOTES WILL BE COUNTED FOR PURPOSES OF DETERMINING
WHETHER A QUORUM IS PRESENT AT THE ANNUAL MEETING AND ABSTENTIONS WILL HAVE THE
EFFECT OF NEGATIVE VOTES. WHETHER OR NOT YOU PLAN TO ATTEND THE ANNUAL MEETING,
PLEASE COMPLETE, SIGN AND DATE THE ACCOMPANYING PROXY AND RETURN IT PROMPTLY IN
THE ENCLOSED RETURN ENVELOPE, WHICH REQUIRES NO POSTAGE IF MAILED IN THE UNITED
STATES. YOU MAY REVOKE YOUR PROXY IN THE MANNER DESCRIBED IN THE ACCOMPANYING
PROXY STATEMENT. IF YOU ATTEND THE MEETING, YOU MAY VOTE IN PERSON, IF YOU WISH
TO DO SO, EVEN IF YOU HAVE PREVIOUSLY SENT IN YOUR PROXY.
<PAGE>   4
                          CORSAIR COMMUNICATIONS, INC.
                              3408 HILLVIEW AVENUE
                           PALO ALTO, CALIFORNIA 94304

                                 PROXY STATEMENT

                         ANNUAL MEETING OF STOCKHOLDERS
                            TO BE HELD JUNE 16, 1999

      The enclosed proxy is solicited on behalf of the Board of Directors of
Corsair Communications, Inc., a Delaware corporation ("Corsair" or the
"Company"), for use at the annual meeting of stockholders to be held on June 16,
1999, and at any adjournment or postponement of the annual meeting (the "Annual
Meeting"). The Annual Meeting will be held at 7:30 a.m. at the Company's
executive offices, 3408 Hillview Avenue, Palo Alto, California. All stockholders
of record on April 30, 1999 will be entitled to notice of and to vote at the
Annual Meeting. This Proxy Statement and accompanying proxy (the "Proxy") were
first mailed to stockholders on or about May 10, 1999.

      The mailing address of the principal executive office of the Company is
3408 Hillview Avenue, Palo Alto, California 94304.

                               PURPOSE OF MEETING

      The specific proposals to be considered and acted upon at the Annual
Meeting are summarized in the accompanying Notice of Annual Meeting of
Stockholders (collectively, the "Proposals"). Each Proposal is described in more
detail in this Proxy Statement.

                         VOTING RIGHTS AND SOLICITATION

VOTING

      On April 30, 1999, the record date for determination of stockholders
entitled to vote at the Annual Meeting, there were 18,120,367 shares of Common
Stock outstanding. Each holder of Common Stock is entitled to one vote on all
matters brought before the Annual Meeting.

      All votes will be tabulated by the inspector of election appointed for the
meeting, who will separately tabulate affirmative and negative votes,
abstentions and broker non-votes. Abstentions and broker non-votes will be
counted for purposes of determining whether a quorum is present at the Annual
Meeting and abstentions will have the effect of negative votes.

REVOCABILITY OF PROXIES

      Any person giving a proxy has the power to revoke it at any time before
its exercise. It may be revoked by filing with the Secretary of the Company at
the Company's principal executive office, 3408 Hillview Avenue, Palo Alto,
California 94304, a notice of revocation or another signed Proxy with a later
date. You may also revoke your Proxy by attending the Annual Meeting and voting
in person.

SOLICITATION

      The expenses of printing and mailing proxy materials to Corsair
stockholders will be borne by Corsair. In addition to the solicitation of
proxies by mail, solicitation may also be made by personal interview, telephone,
telegraph, or facsimile transmission by certain directors, officers and
employees of Corsair or a professional proxy solicitor. Corsair has retained
Corporate Investor Communications, Inc. ("CIC") to assist it in the solicitation
of proxies for which CIC will receive an estimated fee of $6,000. Corsair has
agreed to indemnify CIC and its agents for losses, claims and expense incurred
by CIC in conjunction with services provided except to the extent such losses,
claims or expenses are the result of CIC's negligence. No additional
compensation will be paid to directors, officers or employees of Corsair for
such services. Copies of solicitation materials will be furnished to brokerage
houses, fiduciaries and custodians to forward to beneficial owners of shares
held in their names. Those persons will be reimbursed for their reasonable
expenses in forwarding solicitation materials to beneficial owners.


                                       1
<PAGE>   5
                                   PROPOSAL 1

                              ELECTION OF DIRECTORS

      The Board of Directors of the Company is currently composed of six
members. The Board of Directors is classified into three classes of directors
serving staggered three-year terms, with one class of directors to be elected at
each annual meeting of stockholders. At the 1999 meeting, two directors will be
elected to hold office for three years or until their successors are elected and
qualified. Rachelle Chong and Stephen M. Dow, who are presently serving as
directors, have been nominated for re-election by the Board of Directors. Unless
the enclosed proxy withholds authority to vote for one or more of the nominees
or is a broker non-vote, the shares represented by such proxy will be voted for
the election of the directors as the Board's nominees. If either nominee is
unable to serve, which is not expected, the shares represented by the enclosed
proxy will be voted for such candidate as may be nominated by the Board of
Directors.

VOTE REQUIRED

      The two candidates receiving the highest number of affirmative votes of
the stockholders entitled to vote at the Annual Meeting will be elected
directors of Corsair. Unless otherwise instructed, the proxyholders will vote
each returned proxy for the nominees named above for election to the class whose
term expires in 2002, or for as many nominees of the Board of Directors as
possible, such votes to be distributed among such nominees in the manner as the
proxyholders see fit.

NOMINEES

      The following table sets forth information regarding the nominees for
director and each other person whose terms of office as a director will continue
after the meeting.

<TABLE>
<CAPTION>
                                  YEAR                       CLASS
                              FIRST ELECTED               TERMINATION
NAME                            DIRECTOR          AGE         YEAR                     POSITION
- ----                          -------------       ---     ------------    -----------------------------------
<S>                           <C>                 <C>     <C>             <C>
Mary Ann Byrnes............       1995            42          2001        Chief Executive Officer and Director
Kevin R. Compton(1)........       1994            40          2001        Chairman of the Board and Director
Peter L.S. Currie(1).......       1995            42          2000        Director
Stephen M. Dow(2)..........       1996            43          1999        Director
David H. Ring(2)...........       1995            43          2000        Director
Rachelle Chong.............       1998            39          1999        Director
</TABLE>

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

(1)   Member of Audit Committee.

(2)   Member of Compensation Committee.


                                       2
<PAGE>   6

BUSINESS EXPERIENCE OF NOMINEES FOR ELECTION

      STEPHEN M. DOW. Mr. Dow has served as a Director of the Company since May
1996. Since 1983, Mr. Dow has served as a general partner of Sevin Rosen Funds,
a venture capital investment firm. Mr. Dow is a director of Arqule Inc., Citrix
Systems, Inc. and Viropharma Incorporated, and is also a director of several
privately-held companies.

      RACHELLE CHONG. Ms. Chong has served as a Director of the Company since
December 1998. Since February 1998, Ms. Chong has been a partner at Coudert
Brothers, an international law firm. From May 1994 to November 1997, Ms. Chong
was a Commissioner at the Federal Communications Commission. Ms. Chong was also
a partner at the law firm Graham & James from January 1992 to April 1994.

BUSINESS EXPERIENCE OF DIRECTORS WITH TERMS EXPIRING IN 2000

      PETER L.S. CURRIE. Mr. Currie has served as a Director of the Company
since December 1995. Mr. Currie is currently Senior Vice President and Chief
Financial Officer of Netscape Communications Corporation, an internet and
intranet software company, where he has been employed since April 1995. From
April 1989 to March 1995, Mr. Currie held various management positions at McCaw
Cellular Communications, Inc., a wireless telecommunications carrier, including
Executive Vice President of Corporate Development and Chief Financial Officer.

      DAVID H. RING.  Mr. Ring  has served as a Director of the Company  since
July 1995.  Since April 1996,  Mr. Ring has served as Chairman of the Board of
Tzabaco Group, Inc., a direct marketing company,  and has also served as Chief
Executive  Officer of Tzabaco Group,  Inc.  since October 1996.  From December
1988 to November 1993,  Mr. Ring served as Vice President of Manufacturing for
Cisco  Systems Inc.  where he also served as a Director  from November 1993 to
November 1995.  Mr. Ring was also a Director of Global Village  Communication,
Inc. from May 1991 to July 1996.

BUSINESS EXPERIENCE OF DIRECTORS WITH TERMS EXPIRING IN 2001

      MARY ANN BYRNES. Ms. Byrnes has served as a Director of the Company since
February 1995, as Chief Executive Officer since July 1995 and as President of
the Company from December 1994 to February 1999. Before joining Corsair, from
June 1987 to November 1994, Ms. Byrnes served at Bay Area Cellular Telephone
Company, a wireless telecommunications carrier, as Vice President of Sales and
Marketing and Vice President of Operations. Ms. Byrnes holds a BA in economics
from Wellesley College and an MBA from Harvard Business School.

      KEVIN R. COMPTON. Mr. Compton has served as Chairman of the Board and a
Director of the Company since December 1994 and served as Secretary of the
Company from December 1994 to December 1995. Since 1990, Mr. Compton has served
as a general partner of Kleiner Perkins Caufield & Byers, a venture capital
investment firm. Mr. Compton is a director of Citrix Systems, Inc., Digital
Generation Systems, Inc., Global Village Communication, Inc. and VeriSign, Inc.,
and is also a director of several privately-held companies.

BOARD MEETINGS AND COMMITTEES

      The Company's Board of Directors met a total of six times and acted by
unanimous written consent one time during the year ended December 31, 1998. Mr.
Dow attended 100% of the aggregate of (i) the total meetings of the Board and
(ii) the total number of meetings held by all committees of the Board on which
he served. Ms. Chong was elected to the Board of Directors in December 1998, and
therefore attended only one meeting in 1998.

      The Company has a standing Audit Committee composed of Messrs. Compton and
Currie. The Audit Committee met one time in 1998. The Audit Committee assists in
selecting the independent accountants, designating the services they are to
perform and in maintaining effective communication with those accountants.

      The Company also has a standing Compensation Committee currently composed
of Messrs. Dow and Ring. The Compensation Committee met five times and acted by
unanimous written consent 19 times in 1998. The Compensation Committee reviews
and acts on matters relating to compensation levels and benefit plans for
executive officers and key employees of the Company, including salary and stock
options. The Compensation


                                       3
<PAGE>   7
Committee is also responsible for granting stock awards, stock options and stock
appreciation rights and other awards to be made under the Company's existing
incentive compensation plans.

DIRECTOR COMPENSATION

      The Company reimburses its directors for all reasonable and necessary
travel and other incidental expenses incurred in connection with their
attendance at meetings of the Board. In addition, on the date of each annual
meeting of the Company's stockholders, each non-employee director who is a
director immediately after such meeting will receive an option to purchase 1,500
shares of Common Stock. These options will have an exercise price equal to 100%
of the fair market value of the Company's Common Stock on the date of grant.
Each grant of 1,500 shares will be exercisable from the date of grant for five
years and will be 100% vested upon grant.

RECOMMENDATION OF THE BOARD OF DIRECTORS

      The Board of Directors unanimously recommends a vote FOR Ms. Chong and Mr.
Dow.


                                       4
<PAGE>   8
                                   PROPOSAL 2

                                   APPROVAL OF
                        SELECTION OF INDEPENDENT AUDITORS

      The Company is asking the stockholders to ratify the selection of KPMG LLP
as the Company's independent auditors for the year ending December 31, 1999.

VOTE REQUIRED

      The affirmative vote of a majority of the stockholders represented and
voting at the Annual Meeting will be required to ratify the selection of KPMG
LLP. In the event the stockholders fail to ratify the appointment, the Corsair
Board will reconsider its selection. Even if the selection is ratified, the
Corsair Board, in its discretion, may direct the appointment of a different
independent accounting firm at any time during the year if the Corsair Board
believes such a change would be in Corsair's and its stockholders' best
interests.

      Representatives of KPMG LLP are expected to be present at the Annual
Meeting, will have an opportunity to make a statement if they desire to do so
and will be available to respond to appropriate questions.

RECOMMENDATION OF THE BOARD OF DIRECTORS

      The Board of Directors unanimously recommends a vote FOR the ratification
and approval of the selection of KPMG LLP to serve as Corsair's independent
auditors for the year ending December 31, 1999.


                                       5
<PAGE>   9
                                   PROPOSAL 3

                      APPROVAL OF AN AMENDMENT TO CORSAIR'S
                            1997 STOCK INCENTIVE PLAN

      Stockholders are being asked to consider and vote upon a proposal to
ratify and approve certain amendments to Corsair's 1997 Stock Incentive Plan
(the "Plan"). The Plan was originally adopted by the Corsair Board on May 27,
1997, and was subsequently approved by the Corsair stockholders on May 27, 1997
and became effective on July 29, 1997 (the "Effective Date").

      The amendments proposed to the Plan were adopted by the Corsair Board on
March 25, 1999. These amendments will increase the total number of shares
available for issuance under the Plan from 2,587,633 to 3,337,633 shares and to
change the term of the options granted under the Automatic Option Grant Program
from 10 years to 5 years with such options to be fully vested upon grant.

      The affirmative vote of a majority of the stockholders represented and
voting at the Corsair Meeting is required for approval of the amendments to the
Plan. The Plan, as amended, will become effective immediately upon approval by
Corsair's stockholders at the Corsair Meeting. The following is a summary of the
material terms and provisions of the Plan. This summary, however, does not
purport to be a complete description of all the provisions of the Plan. Copies
of the actual plan document may be obtained by any Corsair stockholder upon
written request to the Secretary of Corsair at the corporate offices in Palo
Alto, California.

PLAN STRUCTURE

      The Plan is divided into four separate parts:

            _     The Discretionary Option Grant Program, under which eligible
                  individuals in Corsair's employ or service (including officers
                  and other employees, non-employee Corsair Board members and
                  independent consultants) may, at the discretion of the Plan
                  Administrator, be granted options to purchase shares of
                  Corsair Common Stock at an exercise price not less than 85% of
                  their fair market value on the grant date. The granted options
                  may be either incentive stock options which are designed to
                  meet the requirements of Section 422 of the Code or
                  nonstatutory options not intended to satisfy such
                  requirements.

            _     The Automatic Option Grant Program under which option grants
                  will automatically be made at periodic intervals to eligible
                  non-employee Corsair Board members to purchase shares of
                  Corsair Common Stock at an exercise price equal to 100% of
                  their fair market value on the grant date.

            _     The Stock Issuance Program, under which such individuals may,
                  in the Plan Administrator's discretion, be issued shares of
                  Corsair Common Stock directly, through the purchase of such
                  shares at a price not less than 100% of their fair market
                  value at the time of issuance or as a bonus tied to the past
                  performance of services,

            _     The Salary Investment Option Grant Program under which
                  executive officers and other highly compensated employees may
                  elect to apply a portion of their base salary to the
                  acquisition of special stock option grants

      As of March 31, 1999, approximately 165 officers and employees were
eligible to participate in the Discretionary Option Grant Program and the Stock
Issuance Program, there are currently five nonemployee directors who will be
eligible to receive automatic grants under the Automatic Grant Program, and the
Plan Administrator has not activated the Salary Investment Option Grant Program.

PLAN ADMINISTRATION

      The Discretionary Option Grant, Stock Issuance and Salary Investment
Option Grant Programs will generally be administered by the Corsair Board or one
or more committees appointed by the Corsair Board except


                                       6
<PAGE>   10
that a committee consisting of two or more non-employee directors will
administer each of these programs with respect to any person subject to Section
16 of the Securities and Exchange Act of 1934, as amended (the "Plan
Administrator"). The Plan Administrator, will have complete discretion to
determine which eligible individuals will receive option grants or stock
issuances, the time or times at which such option grants or stock issuances are
to be made, the number of shares subject to each such grant or issuance, the
vesting schedule to be in effect for the option grant or stock issuance, the
maximum term for which any granted option is to remain outstanding and whether
an option will be granted as an incentive stock option or a non-statutory stock
option under the Federal tax laws. The administration of the Automatic Option
Grant Program will be self-executing in accordance with the express provisions
of such program. All employees, directors and consultants or independent
contractors of Corsair are eligible to receive option grants or stock issuances
under the Plan.

ISSUABLE SHARES

      Shares of the Corsair Common Stock will be available for issuance under
the Plan. The maximum number of shares of Corsair Common Stock reserved for
issuance over the 10 year term of the Plan, measured from the Effective Date of
the Plan, will not exceed 3,337,633 shares. Such authorized share reserve is
comprised of (i) the number of shares that remained available for issuance under
the Plan, including the shares subject to the outstanding options incorporated
into the Plan and any other shares that would have been available for future
option grant or share issuance under predecessor plans as last approved by the
stockholders, plus (ii) an additional 750,000 shares being added to the Plan
pursuant to this Proposal. The number of shares of Corsair Common Stock included
in the Plan will automatically be increased by an additional two percent of the
outstanding number of shares of capital stock of Corsair per year. The share
reserve available for issuance under the Plan will be subject to periodic
adjustment for changes in Corsair's Common Stock occasioned by stock splits,
stock dividends, recapitalizations, conversions or other changes affecting the
outstanding Common Stock as a class without Corsair's receipt of consideration.

      Should an option expire or terminate for any reason prior to exercise in
full (including options canceled in accordance with the cancellation-regrant
provisions described below), the shares subject to the portion of the option not
so exercised will be available for subsequent option grants or share issuances
under the Plan.

TERMS OF DISCRETIONARY GRANT PROGRAM

      Option Price and Term. The option price per share for incentive stock
options will not be less than 100% of the fair market value of each share of
Corsair Common Stock issuable under the option on the grant date of such option.
The option price per share for nonstatutory stock options may not be less than
85% of the fair market value per share of each share of Corsair Common Stock
issuable under the option on the grant date of such option. No option will have
a term in excess of 10 years measured from the grant date.

      Valuation. For purposes of establishing the option exercise price for
Corsair Common Stock, the "Fair Market Value" per share of the stock on any
relevant date will be the closing selling price per share on such date, as
quoted on the Nasdaq National Market. If there is no reported selling price for
such date, then the closing selling price for the last previous date for which
such quotation exists will be determinative of Fair Market Value.

      Vesting of Options. The vesting schedule for each granted option will be
determined by the Plan Administrator and will be set forth in the instrument
evidencing such grant. The granted option may be (i) immediately exercisable for
vested shares, (ii) immediately exercisable for unvested shares subject to
Corsair's repurchase rights or (iii) exercisable in installments for vested
shares over the optionee's period of service. At a minimum, options must vest at
a rate of at least 20% each year and must be fully vested at the end of five
years.

      Payment. Upon exercise of the option, the option price for the purchased
shares will become immediately payable in cash, check or in shares of Corsair
Common Stock valued at fair market value on the date of exercise. The option may
also be exercised through a cashless exercise procedure pursuant to which the
optionee provides irrevocable written instructions to a designated brokerage
firm to effect the immediate sale of the purchased shares and remit to Corsair,
out of the sale proceeds, an amount equal to the aggregate option price payable
for the purchased shares plus all applicable withholding taxes.


                                       7
<PAGE>   11

      Financial Assistance. The Plan Administrator may assist any optionee
(including an officer) in the exercise of one or more outstanding options under
the Plan by (i) authorizing a loan from Corsair or (ii) permitting the optionee
to pay the option price in installments over a period of years. The terms and
conditions of any such loan or installment payment will be established by the
Plan Administrator in its sole discretion, but in no event will the maximum
credit extended to the optionee exceed the aggregate option price for the
purchased shares plus any Federal or State tax liability incurred in connection
with the option exercise.

      Termination of Service. Should the optionee cease to remain in Corsair's
service while holding one or more options under the Plan, then those options
will not remain exercisable beyond the limited post-service period designated by
the Plan Administrator at the time of the option grant, subject to certain
minimum post-service periods. Under no circumstances, however, may any option be
exercised after the specified expiration date of the option term. Each such
option will, during such limited period, be exercisable only to the extent of
the number of shares for which the option is exercisable on the date of the
optionee's cessation of service.

      Should the optionee die while holding one or more outstanding options,
then the personal representative of the optionee's estate or the person or
persons to whom each such option is transferred pursuant to the optionee's will
or in accordance with the laws of inheritance will have the right to exercise
such option for any or all of the shares for which the option is exercisable on
the date of the optionee's cessation of service, less any option shares
previously purchased by the optionee prior to death. Such right will lapse, and
the option will terminate, upon the earlier of (i) the end of the limited
post-service period designated by the Plan Administrator at the time of the
option grant or (ii) the specified expiration date of the option term.

      The Plan Administrator will have complete discretion to extend the period
following the optionee's termination of service during which his or her
outstanding options may be exercised and/or to accelerate the exercisability of
such options in whole or in part. Such discretion may be exercised at any time
while the options remain outstanding, whether before or after the optionee's
actual cessation of service.

      Stockholder Rights and Option Assignability. No optionee is to have any
stockholder rights with respect to the option shares until such optionee has
exercised the option, paid the option price for the purchased shares and been
issued a stock certificate for such shares. Options are not assignable or
transferable other than by will or by the laws of inheritance following the
optionee's death, and the option may, during the optionee's lifetime, be
exercised only by the optionee.

      Acceleration. In the event that Corsair is acquired by merger or asset
sale, the unvested portion of each outstanding option under the Discretionary
Option Grant Program that is not to be assumed by the successor corporation and
each outstanding option under the Salary Investment Option Grant Program will
automatically vest in full. Similarly, unless Corsair assigns the repurchase
rights associated with any unvested shares issued under such programs or the
Stock Issuance Program to the successor corporation, such unvested shares will
vest in full. Any outstanding options assumed by the successor corporation and
shares that remain subject to repurchase rights assigned to the successor
corporation will not vest immediately, but will vest in accordance with their
original vesting schedule. The Plan Administrator will have the authority under
the Discretionary Option Grant, Salary Investment Option Grant and Stock
Issuance Programs to grant options and to structure repurchase rights so that
the shares subject to those options or repurchase rights will automatically vest
in the event the individual's service is terminated, whether involuntarily or
through a resignation for good reason, within a specified period (not to exceed
18 months) following (i) a merger or asset sale in which those options are
assumed or those repurchase rights are assigned, or (ii) the sale, transfer or
disposition of all or substantially all of Corsair's assets (each a "Corporate
Transaction"). The Plan Administrator will also have the discretion to provide
for the automatic acceleration of options and the lapse of any repurchase rights
upon (i) a hostile change in control of Corsair effected by a successful tender
offer for more than 50% of Corsair's outstanding voting stock or by proxy
contest for the election of Board members or (ii) the termination of the
individual's service, whether involuntarily or through a resignation for good
reason, within a specified period (not to exceed 18 months) following such a
hostile change in control. Pursuant to the terms of the option agreements the
unvested portion of the options currently outstanding under predecessor plans
will accelerate and such options will terminate and cease to be exercisable upon
an acquisition of Corsair by merger or asset sale, unless those options are
assumed by the acquiring entity. One-half of the unvested portion of any options
assumed by the successor corporation will automatically accelerate upon the
involuntary termination of the optionee's service within 18 months following the
occurrence of a Corporate Transaction in which the options are assumed or
replaced by the successor corporation.


                                       8
<PAGE>   12

      Stock Appreciation Rights. Stock appreciation rights may be issued in
tandem with option grants made under the Discretionary Option Grant Program. The
holders of these rights will have the opportunity to elect between the exercise
of their outstanding stock options for shares of Common Stock or the surrender
of those options for an appreciation distribution from Corsair equal to the
excess of (i) the fair market value of the vested shares of Corsair Common Stock
subject to the surrendered option over (ii) the aggregate exercise price payable
for such shares. The appreciation distribution may be made in cash or in shares
of Corsair Common Stock. There are currently no outstanding stock appreciation
rights.

      Cancellation/Regrant. The Plan Administrator has the authority to effect
the cancellation of outstanding options under the Discretionary Option Grant
Program (including options incorporated from predecessor plans), with the
consent of the holders of such options, in return for the grant of new options
for the same or a different number of option shares with an exercise price per
share based upon the fair market value of the Corsair Common Stock on the new
grant date.

      On October 2, 1998, the Plan Administrator implemented an option
cancellation/regrant program for employees of the Company, excluding the
Company's executive officers. Pursuant to that program, each such employee was
given the opportunity to surrender his or her outstanding options under the Plan
with exercise prices in excess of $3.00 per share in return for a new option
grant for the same number of shares but with an exercise price of $2.88 per
share, the closing selling price per share of Common Stock as reported on the
Nasdaq National Market on the October 2, 1998 grant date of the new option.
Options for a total of 423,998 shares with a weighted average exercise price of
$13.45 per share were surrendered for cancellation, and new options for the same
number of shares were granted with the $2.88 per share exercise price. To the
extent the higher-priced option was exercisable for any option shares on the
October 2, 1998 cancellation date, the new option granted in replacement of that
option will become exercisable for those shares upon the optionee's continuation
in service through April 2, 1999. The option will vest for the remaining option
shares over the optionee's period of continued service with the Company, except
that the date on which the shares under the new option vest shall be that date
on which such shares would have vested under the cancelled higher-priced option
plus six (6) months.

      On December 15, 1998, the Plan Administrator implemented an option
cancellation/regrant program for the executive officers of the Company. Pursuant
to that program, each executive officer was given the opportunity to surrender
his or her outstanding options under the Plan with exercise prices in excess of
$3.00 per share in return for a new option grant for the same number of shares
but with an exercise price of $5.13 per share, the closing selling price per
share of Common Stock as reported on the Nasdaq National Market on the December
15, 1998 grant date of the new option. Options for a total of 820,561 shares
with a weighted average exercise price of $13.65 per share were surrendered for
cancellation, and new options for the same number of shares were granted with
the $5.13 per share exercise price. To the extent the higher-priced option was
exercisable for any option shares on the December 15, 1998 cancellation date,
the new option granted in replacement of that option will become exercisable for
those shares upon the optionee's continuation in service through November 15,
1999. The option will vest for the remaining option shares over the optionee's
period of continued service with the Company, except that the date on which the
shares under the new option vest shall be that date on which such shares would
have vested under the cancelled higher-priced option plus eleven (11) months.

TERMS OF AUTOMATIC GRANT PROGRAM

      Under the Automatic Option Grant Program, at each annual stockholders
meeting each non-employee Corsair Board member will receive an option to
purchase 1,500 shares of Corsair Common Stock. Each option granted pursuant to
the Automatic Option Grant Program will have an exercise price equal to the fair
market value per share of Corsair Common Stock on the grant date and will have a
maximum term of 5 years, subject to earlier termination following the optionee's
cessation of service on the Corsair Board. The grant of 1,500 shares will be
immediately exercisable and 100% vested on the grant date.

TERMS OF STOCK ISSUANCE PROGRAM

      Issue Price. The purchase price per share will not be less than 100% of
the fair market value of any share of Corsair Common Stock being issued on the
date the Plan Administrator authorizes the issuance.


                                       9
<PAGE>   13
      Vesting of Shares. The vesting schedule for each share issued will be
determined by the Plan Administrator and set forth in the issuance agreement.
The shares may be fully and immediately vested upon issuance or may vest in one
or more installments, subject to Corsair's repurchase right, over the
participant's period of service. At a minimum, shares must vest at a rate of at
least 20% per year and must be fully vested at the end of five years.

      Stockholder Rights. The recipient of the share issuance will have full
stockholder rights, including voting and dividend rights, with respect to the
issued shares, whether or not the shares are vested. However, the recipient may
not sell, transfer or assign any unvested shares issued under the Plan, except
for certain limited family transfers.

      Repurchase Rights. Should the recipient of unvested shares cease to remain
in Corsair's service before vesting in such shares, then those unvested shares
are to be immediately surrendered to Corsair for cancellation, and the recipient
will have no further stockholder rights with respect to those shares. To the
extent the surrendered shares were previously issued to the recipient for
consideration paid in cash or promissory note, Corsair will refund the cash
consideration paid for the surrendered shares and cancel the principal balance
of the note to the extent attributable to such surrendered shares.

      Payment. Upon issuance of the shares, the issue price for the purchased
shares will become immediately payable in cash, in shares of Corsair Common
Stock valued at fair market value on the date of issuance, or by promissory note
payable to Corsair's order. The promissory note may, at the discretion of the
Plan Administrator, be subject to cancellation over the participant's period of
service. Shares may also be issued for past or future services, without any cash
or other payment required of the participant.

      Acceleration. Corsair has entered into agreements with certain individuals
holding unvested shares under the Plan, pursuant to which the vesting of such
shares will accelerate in the event the individual's employment is terminated
within 18 months after a change in control of Corsair. The change in control
events under these agreements include transactions in addition to those in
effect for Plan purposes. These agreements assure such individuals that either
their services will continue to be required after any such change in control or
that they will in fact receive the appreciated value of their outstanding shares
despite the change in control.

TERMS OF SALARY INVESTMENT OPTION GRANT PROGRAM

      In the event the Plan Administrator elects to activate the Salary
Investment Option Grant Program for one or more calendar years, each executive
officer and other highly compensated employee of Corsair selected for
participation may elect, prior to the start of the calendar year, to reduce his
or her base salary for that calendar year by a specified dollar amount not less
than $10,000 nor more than $50,000. If such election is approved by the Plan
Administrator, the officer will be granted, as soon as possible after the start
of the calendar year for which the salary reduction is to be in effect, a
non-statutory option to purchase that number of shares of Common Stock
determined by dividing the total salary reduction amount by an amount equal to
at least one-third and no more than two-thirds (the exact amount to be
established by the Plan Administrator) of the fair market value per share of
Common Stock on the grant date. The option will be exercisable at a price per
share equal to the difference between the amount of the salary reduction agreed
to by the optionee for the option and the fair market value of the option shares
on the grant date. As a result, upon exercise of the options issued under the
Salary Investment Option Grant Program, the optionee will have paid 100% of the
fair market value of the option shares as of the grant date through the payment
of the exercise price and the agreed salary reduction. The option will become
exercisable in a series of twelve (12) equal monthly installments over the
calendar year for which the salary reduction is in effect and will become fully
exercisable upon certain changes in the ownership or control of Corsair or sale
of its assets.

CHANGES IN CAPITALIZATION

      In the event any change is made to the Corsair Common Stock issuable under
the Plan by reason of any recapitalization, stock dividend, stock split,
combination of shares, exchange of shares, or other change in corporate
structure effected without Corsair's receipt of consideration, appropriate
adjustments will be made to (i) the maximum number and/or class of securities
issuable under the Plan, (ii) the number and/or class of securities and price
per share in effect under each outstanding option.

      Each outstanding option which is assumed or is otherwise to continue in
effect after a Corporate Transaction will be appropriately adjusted to apply and
pertain to the number and class of securities which would


                                       10
<PAGE>   14
have been issuable, in connection with such Corporate Transaction, to an actual
holder of the same number of shares of Corsair Common Stock as are subject to
such option immediately prior to such Corporate Transaction. Appropriate
adjustments will also be made to the option price payable per share and to
number and class of securities available for issuance under the Plan.

      Option grants under the Plan will not affect the right of Corsair to
adjust, reclassify, reorganize or otherwise change its capital or business
structure or to merge, consolidate, dissolve, liquidate or sell or transfer all
or any part of its business or assets.

SPECIAL TAX WITHHOLDING ELECTION

      The Plan Administrator may provide one or more participants in the Plan
with the election to have Corsair withhold, from the shares of Corsair Common
Stock otherwise issuable upon the exercise of nonqualified options or the
vesting of unvested shares, a portion of those shares in satisfaction of the tax
liability incurred in connection with their acquisition or vesting. Any election
so made will be subject to the approval of the Plan Administrator, and no shares
will be accepted in satisfaction of such tax liability except to the extent the
Plan Administrator approves the election. Alternatively, one or more
participants may be granted the right, subject to Plan Administrator approval,
to deliver existing shares of Corsair Common Stock in satisfaction of such tax
liability. The withheld or delivered shares will be valued at their then current
fair market value.

AMENDMENT AND TERMINATION

      The Board of Directors may amend or modify the Plan in any or all respects
whatsoever, subject, however, to the limitation on plan amendments to the
Automatic Grant Program. However, no such amendment may adversely affect the
rights of existing optionees without their consent and unless otherwise
necessary to comply with applicable tax laws and regulations. In addition, the
Board may not (i) materially increase the maximum number of shares issuable
under the Plan or the number of shares for which automatic grants may be made to
nonemployee Board members, except in the event of certain changes to Corsair's
capital structure as indicated above, (ii) materially modify the eligibility
requirements for option grants or (iii) otherwise materially increase the
benefits accruing to participants under the Plan without the approval of
Corsair's stockholders.

      The Board may terminate the Plan at any time, and the Plan will in all
events terminate on the tenth anniversary of the Effective Date. Each stock
option outstanding at the time of such termination will remain in force in
accordance with the provisions of the instruments evidencing such grant.

FEDERAL TAX CONSEQUENCES

      Options granted under the Plan may be either incentive stock options which
satisfy the requirements of Section 422 of the Internal Revenue Code or
nonqualified options which are not intended to meet such requirements. The
Federal income tax treatment for the two types of options differs as described
below:

      Incentive Options. No taxable income is recognized by the optionee at the
time of the option grant, and no taxable income is generally recognized at the
time the option is exercised. The optionee will, however, recognize taxable
income in the year in which the purchased shares are sold or otherwise made the
subject of disposition.

      For Federal tax purposes, dispositions are divided into two categories:
(i) qualifying and (ii) disqualifying. The optionee will make a qualifying
disposition of the purchased shares if the sale or other disposition of such
shares is made after the optionee has held the shares for more than two years
after the grant date of the option and more than one year after the exercise
date. If the optionee fails to satisfy either of these two holding periods prior
to the sale or other disposition of the purchased shares, then a disqualifying
disposition will result.

      Upon a qualifying disposition of the shares, the optionee will recognize
long-term capital gain in an amount equal to the excess of (i) the amount
realized upon the sale or other disposition of the purchased shares over (ii)
the exercise price paid for such shares. If there is a disqualifying disposition
of the shares, then the excess of (i) the fair market value of those shares on
the date the option was exercised over (ii) the exercise price paid for the
shares will be taxable as ordinary income. Any additional gain recognized upon
the disposition will be a capital gain.


                                       11
<PAGE>   15
      If the optionee makes a disqualifying disposition of the purchased shares,
then Corsair will be entitled to an income tax deduction, for the taxable year
in which such disposition occurs, equal to the excess of (i) the fair market
value of such shares on the date the option was exercised over (ii) the exercise
price paid for the shares. In no other instance will Corsair be allowed a
deduction with respect to the optionee's disposition of the purchased shares.

      Nonqualified Options. No taxable income is recognized by an optionee upon
the grant of a nonqualified option. The optionee will in general recognize
ordinary income, in the year in which the option is exercised, equal to the
excess of the fair market value of the purchased shares on the date of exercise
over the exercise price paid for the shares, and the optionee will be required
to satisfy the tax withholding requirements applicable to such income.

      Special provisions of the Internal Revenue Code apply to the acquisition
of Corsair Common Stock under a nonqualified option, if the purchased shares are
subject to repurchase by Corsair. These special provisions may be summarized as
follows:

            A.    If the shares acquired upon exercise of the nonqualified
                  option are subject to repurchase by Corsair at the original
                  exercise price in the event of the optionee's termination of
                  service prior to vesting in such shares, the optionee will not
                  recognize any taxable income at the time of exercise but will
                  have to report as ordinary income, as and when Corsair's
                  repurchase right lapses, an amount equal to the excess of (i)
                  the fair market value of the shares on the date Corsair's
                  repurchase right lapses with respect to such shares over (ii)
                  the exercise price paid for the shares.

            B.    The optionee may, however, elect under Section 83(b) of the
                  Internal Revenue Code to include as ordinary income in the
                  year of exercise of the nonqualified option an amount equal to
                  the excess of (i) the fair market value of the purchased
                  shares on the date of exercise (determined as if the shares
                  were not subject to Corsair's repurchase right) over (ii) the
                  exercise price paid for such shares. If the Section 83(b)
                  election is made, the optionee will not recognize any
                  additional income as and when the Corsair's repurchase right
                  lapses.

      Corsair will be entitled to a business expense deduction equal to the
amount of ordinary income recognized by the optionee with respect to the
exercised nonqualified option. The deduction will in general be allowed for the
taxable year of Corsair in which such ordinary income is recognized by the
optionee.

      Stock Appreciation Rights. An optionee who is granted a stock appreciation
right will recognize ordinary income in the year of exercise equal to the amount
of the appreciation distribution. Corsair will be entitled to a business expense
deduction equal to the appreciation distribution for the taxable year of Corsair
in which the ordinary income is recognized by the optionee.

      Direct Stock Issuances. The tax consequences of individuals who receive
direct stock issuances under the Plan will be substantially the same as the
treatment described above for the exercise of nonqualified stock options.

ACCOUNTING TREATMENT

      Option grants with exercise prices less than the fair market value of the
option shares on the grant date and direct stock issuances at purchase prices
less than the fair market value of the issued shares will result in a
compensation expense to Corsair's earnings equal to the difference between such
exercise or purchase prices and the fair market value of the shares on the
option grant date or (for direct stock issuances) the fair market value on the
issue date. Such expense will be recorded by Corsair over the period the
optionee or share recipient vests in the option shares or directly-issued
shares. Option grants and direct stock issuances to employees at 100% of fair
market value will not result in any charge to Corsair's earnings. Whether or not
granted at a discount, the number of outstanding options may be a factor in
determining Corsair's earnings per share.

      The Financial Accounting Standards Board recently announced its intention
to issue an exposure draft of a proposed interpretation of the current
accounting principles applicable to equity incentive plans such as the Option
Plan. Under the proposed interpretation, option grants made to non-employee
Board members or consultants after December 15, 1998 will result in a direct
charge to the Company's reported earnings based upon the fair value of the


                                       12
<PAGE>   16
option measured initially as of the grant date of that option and then
subsequently on the vesting date of each installment of the underlying option
shares. If the proposed interpretation is adopted, then such charge will
accordingly include the appreciation in the value of the option shares over the
period between the grant date of the option (or, if later, the effective date of
the final interpretation) and the vesting date of each installment of the option
shares. In addition, if the proposed interpretation is adopted, any options
which are repriced after December 15, 1998 will also trigger a direct charge to
the Company's reported earnings measured by the appreciation in value of the
underlying shares between the grant date of the option (or, if later, the
effective date of the final amendment) and the date the option is exercised for
those shares.

      Should one or more optionees be granted stock appreciation rights which
have no conditions upon exercisability other than a service or employment
requirement, then such rights will result in a compensation expense to be
charged against Corsair's earnings. Accordingly, at the end of each fiscal
quarter, the amount (if any) by which the fair market value of the shares of
Corsair Common Stock subject to such outstanding stock appreciation rights has
increased from the prior quarter-end will be accrued as compensation expense, to
the extent such amount is in excess of the aggregate exercise price in effect
for such rights.


                                       13
<PAGE>   17
OUTSTANDING OPTION GRANTS UNDER THE PLAN

      The table below shows, as to each of the Company's executive officers
named in the Executive Compensation and Other Information Table and the various
indicated individuals and groups, the number of shares of Common Stock subject
to options granted under the Option Plan between January 1, 1998 and March 31,
1999, together with the weighted average exercise price payable per share. The
number of shares and weighted average exercise price calculations include all
options which were granted during the indicated period and subsequently
cancelled and regranted at a lower exercise price in Fiscal Year 1998.

<TABLE>
<CAPTION>
                                                                              Weighted
                                                                 Options       Average
                                                                Granted(#)  Exercise Price
                                                                ----------  --------------
<S>                                                             <C>         <C>
Mary Ann Byrnes(1)
      Director and Chief Executive Officer ..................     165,754       $4.49
Thomas C. Meyer(2)
      President and COO .....................................     146,534       $4.21
Martin J. Silver
      Chief Financial Officer and Secretary .................      85,000       $4.25
Donald R. Oestreicher
      Vice President, Engineering ...........................      60,000       $4.07
Evan J. McDowell, Jr.
      Vice President, Sales .................................      73,667       $4.26
All current directors who are not executive officers ........           0       $   0
All current executive officers as a group ...................     938,955       $7.45
All employees, including all current officers who are not
      executive officers, as a group ........................   2,140,048       $6.34
</TABLE>

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

(1)   Mary Ann Byrnes resigned as president in February 1999.

(2)   Thomas Meyer was appointed president and COO in February 1999.

      As of March 31, 1999, options covering 1,586,954 shares of Common Stock
were outstanding under the Plan, 1,440,925 shares remained available for future
option grant or direct issuance (assuming stockholder approval of the increase
which forms part of this Proposal), and 309,754 shares have been issued pursuant
to the exercise of outstanding options under the Plan.

RECOMMENDATION OF THE BOARD OF DIRECTORS

      The Corsair Board believes that the Plan, as amended, is necessary in
order to continue to provide equity incentives to attract and retain the
services of key employees, consultants and nonemployee members of the Corsair
Board. For this reason, the Corsair Board recommends a vote FOR this proposal.
If this proposal is not approved, the number of shares available for issuance
will remain at 2,587,633 shares.


                                       14
<PAGE>   18
                                   PROPOSAL 4

                      APPROVAL OF AN AMENDMENT TO CORSAIR'S
                        1997 EMPLOYEE STOCK PURCHASE PLAN

      Stockholders are also being asked to consider and vote upon a proposal to
approve an amendment to Corsair's 1997 Employee Stock Purchase Plan (the
"Purchase Plan"). The Purchase Plan was originally adopted by the Corsair Board
on May 20, 1997, and was subsequently approved by the Corsair stockholders on
May 27, 1997 and became effective on July 29, 1997.

      The amendment proposed to the Purchase Plan was adopted by the Corsair
Board on March 25, 1999, subject to stockholder approval. The amendment will
increase the total number of shares available for issuance under the Purchase
Plan by an additional 400,000 shares to a total of 666,667.

      The affirmative vote of a majority of the stockholders represented and
voting at the Corsair Meeting is required for approval of the amendment to the
Purchase Plan. The Purchase Plan, as amended, will become effective immediately
upon approval by Corsair's stockholders at the Corsair meeting. The following is
a summary of the material terms and provisions of the Purchase Plan. This
summary, however, does not purport to be a complete description of the Purchase
Plan. Copies of the actual plan document may be obtained by any stockholder upon
written request to the Secretary of Corsair at the corporate offices in Palo
Alto, California.

SHARE RESERVE AND PLAN ADMINISTRATION

      The maximum number of shares that may be sold to participants over the
term of the Purchase Plan may not exceed 666,667 shares of Corsair Common Stock,
assuming stockholder approval of this proposal. As of March 31, 1999, 166,029
shares of Corsair Common Stock had been issued under the Purchase Plan and
500,638 shares will be available for future issuance (assuming stockholder
approval of the 400,000 share increase). Appropriate adjustments will be made to
(i) the class and maximum number of securities purchasable under the Purchase
Plan, (ii) the class and maximum number of securities purchasable per
participant during any one purchase period and (iii) the class and number of
securities and the price per share in effect under each outstanding purchase
right in order to preserve participant rights should any change be made to the
outstanding Corsair Common Stock by reason of any stock dividend, stock split,
combination of shares or other similar change affecting the outstanding Corsair
Common Stock as a class without the Corsair's receipt of consideration.

      The Purchase Plan is administered by the Compensation Committee of the
Board of Directors. The committee as Plan Administrator has full authority to
adopt administrative rules and procedures and to interpret the provisions of the
Purchase Plan and any outstanding purchase rights.

ELIGIBILITY

      Each individual customarily employed by Corsair or a participating
subsidiary for more than 20 hours per week and more than five months per
calendar year is eligible to participate in the Purchase Plan upon completion of
five months of continuous service. As of March 31, 1999, approximately 165
employees were eligible to participate under the Purchase Plan.

PLAN OPERATION

      The Purchase Plan will be implemented in a series of successive offering
periods, each with a maximum duration of 24 months. Individuals who are eligible
employees on the start date of any offering period may enter the Purchase Plan
on that start date or on any subsequent semi-annual entry date (March 1 or
September 1 each year). Individuals who become eligible employees after the
start date of the offering period may join the Purchase Plan on any subsequent
semi-annual entry date within that period.

      Each participant may, through authorized payroll deductions, contribute up
to 10% of base pay (in one percent multiples) during each offering period.
However, no participant may purchase more than 7,500 shares of Corsair Common
Stock during any one offering period nor more than $25,000 worth of Corsair
Common Stock


                                       15
<PAGE>   19
(based upon the value of the Corsair Common Stock at the time the offering
period begins) for each calendar year the purchase right remains outstanding.

      The purchase price will be equal to the lesser of (i) 85% of the fair
market value per share of Corsair Common Stock on the last business day
immediately preceding the start date of the offering period or (ii) 85% of the
fair market value per share of Corsair Common Stock on each semi-annual date the
purchase right is exercised during that offering period. Should the fair market
value of Corsair Common Stock on any semi-annual purchase date be less than the
fair market value of the Corsair Common Stock on the first day of the offering
period, then the current offering period will automatically end and a new
24-month offering period will begin, based on the lower fair market value.

      The fair market value of the Corsair Common Stock on any relevant date
will be the closing selling price per share on such date as reported on the
Nasdaq National Market System. As of March 31, 1999 the fair market value per
share of Common Stock was $5.125, based on the closing selling price per share
on such date on the Nasdaq National Market System.

      No participant will have any stockholder rights with respect to the shares
covered by his or her outstanding purchase right until the shares are actually
purchased on his or her behalf. No purchase right will be assignable or
transferable except by will or by the laws of descent and distribution following
the participant's death. Accordingly, during the participant's lifetime, the
purchase right will be exercisable only by the participant.

      In the event all or substantially all of the assets or outstanding capital
stock of Corsair is sold by means of a sale, merger or other reorganization in
which Corsair will not be the surviving corporation, all outstanding purchase
rights will automatically be exercised immediately prior to the effective date
of such transaction.

      The purchase right of a participant will cease to accrue automatically in
the event the participant ceases to be an employee of Corsair, and any payroll
deductions collected from such individual during the fiscal semi-annual in which
such termination occurs will, at participants election, either (i) be refunded
to participant or (ii) held for the purchase of shares on the semi-annual
purchase date immediately following the cessation of employment. A participant
may also terminate his or her outstanding purchase right at any time prior to
the last five (5) business days of a semi-annual period and receive a refund of
all payroll deductions not yet applied to the purchase of Common Stock on his or
her behalf.

AMENDMENT AND TERMINATION

      The Purchase Plan will terminate upon the earlier of (i) the last business
day in July 2007, (ii) the date on which all shares available for issuance
thereunder are sold pursuant to exercised purchase rights, or (iii) the date on
which all purchase rights are exercised in connection with an acquisition of
Corsair. However, Corsair has specifically reserved the right, exercisable in
the sole discretion of the Plan Administrator, to terminate all outstanding
purchase rights under the Purchase Plan immediately following any semi-annual
purchase date. If such right is exercised by Corsair, then the Purchase Plan
will terminate in its entirety, and no further purchase rights will be granted
or exercised thereunder.

      The Corsair Board may amend or modify the provisions of the Purchase Plan
at any time. However, the Corsair Board may not, without stockholder approval,
(i) materially increase the number of shares issuable under the Purchase Plan or
the maximum number of shares which any one participant may purchase during a
single offering period, (ii) alter the purchase price formula so as to reduce
the purchase price, (iii) materially increase the benefits accruing to
participants or (iv) materially modify the requirements for eligibility to
participate in the Purchase Plan.

FEDERAL TAX CONSEQUENCES

      The Purchase Plan is intended to be a qualified plan under Section 423 of
the Code. Accordingly, the Participant will not recognize any taxable income at
the time one or more shares of Corsair Common Stock are purchased on his/her
behalf on any semi-annual purchase date under the Purchase Plan.


                                       16
<PAGE>   20
ACCOUNTING TREATMENT

      All of the existing accounting rules for employee stock benefit plans are
currently being reviewed by the Financial Accounting Standards Board.
Accordingly, the accounting treatment for stock issuances under the Purchase
Plan may change significantly in the future.

PURCHASES UNDER THE PLAN

      The table below shows, as to the Named Executive Officers and as to the
various indicated groups, the following information with respect to stock
issuances during fiscal 1997, 1998 and during the first quarter of 1999, plus
stock issuances under the Purchase Plan to the extent currently known or
determinable: (i) the number of shares of Corsair Common Stock and (ii) the
weighted average purchase price per share.

<TABLE>
<CAPTION>
                                                      Fiscal 1997 and 1998
                                                     and First Quarter 1999
                                                   --------------------------
                                                                     Weighted
                                                                     Average
                                                   Shares            Purchase
                                                     (#)              Price
                                                   -------           --------
<S>                                                <C>              <C>   
MARY ANN BYRNES(1) .............................     2,303            $ 7.08
Director and Chief Executive Officer

THOMAS C. MEYER(2) .............................       595            $12.75
President and COO

MARTIN J. SILVER ...............................       700            $12.75
Chief Financial Officer and Secretary

DONALD R. OESTREICHER ..........................       666            $12.75
Vice President, Engineering

EVAN J. MCDOWELL, JR. ..........................     1,809            $ 6.24
Vice President, Sales

All current executive officers as a group 
(8 persons) ....................................    10,554            $ 7.90

All employees, including all current officers 
who are not executive officers, as a group 
(124 persons) ..................................   159,956            $ 5.33
</TABLE>
- --------------
(1)   Mary Ann Byrnes resigned as president in February 1999.

(2)   Thomas Meyer was appointed president and COO in February 1999.

RECOMMENDATION OF THE BOARD OF DIRECTORS

      The Board of Directors believes that the amendment to the Purchase Plan is
necessary in order to continue to provide meaningful equity incentives to
attract and retain the services of valued employees. For this reason, the Board
of Directors recommends that the stockholders vote FOR this proposal.


                                       17
<PAGE>   21
                            PRINCIPAL STOCKHOLDERS

      The following table sets forth certain information regarding the
beneficial ownership of the Company's Common Stock as of March 31, 1999, by all
those known by the Company to be beneficial owners of more than 5% of its
outstanding Common Stock.

<TABLE>
<CAPTION>
                                                        SHARES BENEFICIALLY OWNED
                                                        -------------------------
NAME AND ADDRESS OF BENEFICIAL OWNER(1)                 NUMBER(1)      PERCENT(2)
- ----------------------------------------                ----------     ----------
<S>                                                     <C>            <C>
Kleiner Perkins Caufield & Byers(3)....................  1,135,236        6.2%
    2750 Sand Hill Road
    Menlo Park, CA 94025

Sevin Rosen Funds(4)...................................  1,431,563        7.9%
    Two Galleria Tower
    13455 Noel Road, Suite 1670
    Dallas, TX 75420

Norwest Equity Partners(5) ............................    939,578        5.2%
    2800 Piper Jaffray Tower
    222 South Ninth Street
    Minneapolis, MN  55402

TRW Inc................................................  1,346,567        7.4%
    1 Federal System Park Drive
    Fairfax, VA 22033

Arlene Harris..........................................  1,222,539        6.7%
    2704 Ocean Front Drive
    Del Mar, CA  92014

Advent International...................................  1,848,209       10.2%
    75 State Street
    Boston, MA  02109
</TABLE>
- --------------
(1)   Except as indicated in the footnotes to this table, the persons named in
      the table have sole voting and investment power with respect to all shares
      of Common Stock shown as beneficially owned by them.

(2)   Percentage of ownership is calculated based on 18,114,191 shares of Common
      Stock outstanding on March 31, 1999, and is calculated pursuant to Rule
      13d-3(d)(1) under the Securities Exchange Act of 1934, as amended.

(3)   Includes 1,125,998 shares held by Kleiner Perkins Caufield & Byers VII and
      9,238 shares held by KPCB Information Sciences Zaibatsu Fund II.

(4)   Includes 1,428,229 shares held by Sevin Rosen Fund IV L.P. and 3,334
      shares held by Sevin Rosen Bayless Management Company.

(5)   Includes 566,767 shares held by Norwest Equity Partners, IV and 372,811
      shares held by Norwest Equity Partners, V.


                                       18
<PAGE>   22
               COMMON STOCK OWNERSHIP OF DIRECTORS AND MANAGEMENT

      The following table sets forth certain information regarding the
beneficial ownership of the Company's Common Stock as of March 31, 1999 by (i)
each director and nominee named under "Election of Directors," (ii) each of the
Company's officers named under "Executive Compensation and Other
Information--Summary Compensation Table" and (iii) all directors and executive
officers of the Company as a group.

<TABLE>
<CAPTION>
                                                      SHARES BENEFICIALLY OWNED
                                                      -------------------------
NAME AND ADDRESS OF BENEFICIAL OWNER(1)               NUMBER(1)       PERCENT(2)
- ---------------------------------------------         ---------       ---------
<S>                                                   <C>             <C> 
Mary Ann Byrnes(3) ..........................           521,823          2.9%

Rachelle Chong(4) ...........................               500            *

Kevin R. Compton(5) .........................         1,147,625          6.3%
  2750 Sand Hill Road
  Menlo Park, CA 94025

Peter L.S. Currie(6) ........................            33,334            *

Stephen M. Dow(7) ...........................         1,439,063          8.0%
  Two Galleria Tower
  13455 Noel Road, Suite 1670
  Dallas, TX 75240

David H. Ring(8) ............................            64,338            *

Martin J. Silver(9) .........................           165,700            *

Evan J. McDowell(10) ........................           161,310            *

Thomas C. Meyer(11) .........................           172,201            *

Donald R. Oestreicher(12) ...................           148,612            *

All directors and executive officers
   as a group (13 persons)(13) ..............         4,275,949         23.6%
</TABLE>

- ----------

*     Less than 1%

(1)   Except as otherwise indicated, (i) the persons named in the table have
      sole voting and investment power with respect to all shares of Common
      Stock shown as beneficially owned by them, subject to community property
      laws, where applicable and (ii) the address for all persons named in the
      table is: 3408 Hillview Avenue, Palo Alto, California 94304.

(2)   Percentage of ownership is based on 18,120,967 shares of Common Stock
      outstanding on April 31, 1999, and is calculated pursuant to Rule
      13d-3(d)(1) under the Securities Exchange Act of 1934, as amended.

(3)   Includes 165,754 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999. Also includes 356,069 shares
      beneficially owned by the Wampler-Byrnes Family Trust. Ms. Byrnes is
      co-trustee and a beneficiary of the Wampler-Byrnes Family Trust. Ms.
      Byrnes has pledged 185,050 shares to the Company in exchange for a loan.

(4)   Includes 500 shares jointly owned by Kirk Del Prete and Rachelle Chong.
      (5) Includes 1,125,998 shares held by Kleiner Perkins Caufield & Byers VII
      and 9,238 shares held by KPCB Information Sciences Zaibatsu Fund II. Mr.
      Compton is a Director of the Company and a general partner of each of
      Kleiner Perkins Caufield & Byers VII and KPCB Information Sciences
      Zaibatsu Fund II. Mr. Compton disclaims beneficial ownership of such
      shares except to the extent of his pecuniary interest therein. Also
      includes 4,889 shares held by Mr. Compton and 7,500 shares issuable to Mr.
      Compton upon the exercise of options exercisable within 60 days of March
      31, 1999.

(6)   Includes 33,334 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999.

(7)   Includes 1,428,229 shares held by Sevin Rosen Fund IV L.P. and 3,334
      shares held by Sevin Rosen Bayless Management Company. Mr. Dow is a
      Director of the Company, a general partner of SRB


                                       19
<PAGE>   23

      Associates IV L.P., the general partner of Sevin Rosen Fund IV L.P., and
      an officer of Sevin Rosen Bayless Management Company. Mr. Dow disclaims
      beneficial ownership of such shares except to the extent of his pecuniary
      interest therein. Also includes 7,500 shares issuable to Mr. Dow upon the
      exercise of options exercisable within 60 days of March 31, 1999.

(8)   Includes 7,526 shares held by Eureka Investments, L.P. and 6,062 shares
      held by the David H. Ring Charitable Remainder Unitrust. Mr. Ring is a
      Director of the Company, a general partner of Eureka Investments, L.P. and
      the trustee of the David H. Ring Charitable Remainder Unitrust. Mr. Ring
      disclaims beneficial ownership of the shares held by Eureka Investments,
      L.P. and the David H. Ring Charitable Remainder Unitrust except to the
      extent of his pecuniary interest therein.

(9)   Includes 85,000 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999. Also includes 80,700 shares beneficially
      held by Martin J. Silver or Victoria H. Silver as joint tenants with right
      of survivorship.

(10)  Includes 73,667 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999.

(11)  Includes 146,534 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999.

(12)  Includes 79,278 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999.

(13)  Includes 897,032 shares issuable upon the exercise of options exercisable
      within 60 days of March 31, 1999. See also footnotes 3, 5, 7 and 8.


                                       20
<PAGE>   24

                              EXECUTIVE OFFICERS

      The executive officers of the Company as of March 31, 1999, are as
follows:

<TABLE>
<CAPTION>
NAME                            AGE     POSITION
- ----                            ---     --------
<S>                             <C>     <C>
Mary Ann Byrnes................  42     Chief Executive Officer and Director
Thomas C. Meyer................  42     President and COO
Martin J. Silver...............  42     Chief Financial Officer and Secretary
Evan J. McDowell...............  52     Vice President, Sales
Donald R. Oestreicher..........  53     Vice President, Engineering
Jeanette Robinson..............  48     Vice President, Human Resources
John F. Scott..................  35     Vice President, Strategy and Business Development
David G. Thompson..............  38     Vice President, Marketing
</TABLE>

      MARY ANN BYRNES. Ms. Byrnes, the Company's Chief Executive Officer,
resigned as president of the Company in February, 1999. See "Election of
Directors" for a discussion of Ms. Byrnes' business experience.

      THOMAS C. MEYER. Mr. Meyer was promoted to President in February 1999 and
was also appointed COO. Mr. Meyer previously served as Vice President,
Operations of the Company from April 1996 to February 1999. Before joining
Corsair, Mr. Meyer was Senior Vice President of Operations at Blyth Software
Inc., a software development company, from April 1994 to March 1996. Previous to
that, he was Vice President and General Manager of the Customer Services
Division of Pyramid Technology Corporation, a company that develops open systems
servers for the commercial computing market, from January 1990 to March 1994.
Mr. Meyer holds a BS in computer engineering from the University of Bridgeport
in Connecticut.

      MARTIN J. SILVER. Mr. Silver has served as Chief Financial Officer and
Secretary of the Company since January 1996. Mr. Silver most recently served as
Chief Financial Officer and Treasurer at Superconductivity, Inc., a developer of
magnets for use by utilities to store energy, from January 1993 to December
1995. Prior to that, Mr. Silver served as Chief Financial Officer and Corporate
Secretary at Credence Systems Corporation, a developer of testing devices for
semiconductors, from November 1988 to December 1992. Mr. Silver holds a BS in
electrical engineering from Purdue University and an MBA from The University of
Pennsylvania, The Wharton School of Business.

      EVAN J. MCDOWELL. Mr. McDowell has served as Vice President, Sales of the
Company since January 1997. Prior to joining Corsair, Mr. McDowell was employed
by Polycom, Inc., a telecommunications products company, where he served as Vice
President of Sales and Marketing from November 1993 to January 1997. From March
1989 to November 1993, Mr. McDowell served as General Manager of the Voice
Information Services Division at Octel Communications Corporation, a voice
messaging company. Mr. McDowell holds a BS in accounting and an MBA from San
Diego State University.

      DONALD R. OESTREICHER. Dr. Oestreicher has served as Vice President,
Engineering of the Company since joining the Company in July 1996. Prior to
joining Corsair, Dr. Oestreicher was employed by AirSoft, Inc., a software
development company, where he was Vice President of Engineering from July 1995
to July 1996. Dr. Oestreicher served as Vice President, Research & Development
at Blyth Software Inc., a software development company, from January 1993 to
June 1995. From August 1990 to December 1992, Dr. Oestreicher was Director,
Software Product Development for Dow Jones & Company Inc., a publishing company.
Dr. Oestreicher holds a BS in economics from the Massachusetts Institute of
Technology, a PhD in computer science from the University of Utah, and an MBA
from Santa Clara University.

      JEANNETTE ROBINSON. Ms. Robinson joined the Company in January 1996 as
Director of Human Resources and was promoted to Vice President, Human Resources
of the Company in January 1997. Prior to joining Corsair, Ms. Robinson was
employed by Cisco Systems Inc., a provider of internet-working products, where
she held several human resources management and recruiting positions from June
1990 to January 1996. Ms. Robinson holds a BS in business administration and a
BA in sociology from San Jose State University.


                                       21
<PAGE>   25

      JOHN F. SCOTT. Mr. Scott has served as Vice President, Strategy and
Business Development of the Company since January 1995. Prior to joining
Corsair, Mr. Scott served as Director of Marketing Strategy and Marketing
Product Manager at Bay Area Cellular Telephone Company from September 1992 to
January 1995. Mr. Scott served as a consultant with Boston Consulting Group, a
consulting firm, from August 1990 to March 1992, and served as an independent
consultant from April 1992 to September 1992. Mr. Scott holds a BA in economics
from Claremont McKenna College and an MBA from Harvard Business School.

      DAVID G. THOMPSON. Mr. Thompson has served as Vice President, Marketing of
the Company since January 1995. Mr. Thompson also served as Vice President,
Sales of the Company from January 1995 to January 1997. Prior to joining
Corsair, Mr. Thompson served as Director of Marketing at Digital Pictures, Inc.,
a software development company, from August 1994 to January 1995. Previous to
that, he was Director of Marketing and Manager of Marketing Strategy at Bay Area
Cellular Telephone Company from March 1992 to August 1994. Mr. Thompson holds a
AB in economics from Harvard University.


                                       22
<PAGE>   26
                  EXECUTIVE COMPENSATION AND OTHER INFORMATION

SUMMARY OF CASH AND CERTAIN OTHER COMPENSATION

      The following table sets forth information concerning the aggregate
compensation paid by the Company to the Company's President and Chief Executive
Officer and to the four additional most highly compensated executive officers
(the "Named Executive Officers") for services rendered in all capacities to the
Company for the years ended December 31, 1996 and 1997 and 1998:

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                                       LONG-TERM
                                                                                      COMPENSATION
                                             ANNUAL COMPENSATION                         AWARDS
                                -------------------------------------------------    --------------
                                                                        OTHER          SECURITIES           ALL
NAME AND                                                                ANNUAL         UNDERLYING          OTHER
PRINCIPAL POSITION              YEAR(1)   SALARY(2)      BONUS       COMPENSATION    OPTIONS/SARS(#)    COMPENSATION
- ---------------------------     -------   ---------     --------     ------------    ---------------    ------------
<S>                             <C>       <C>           <C>          <C>             <C>                <C>
MARY ANN BYRNES                  1998     $190,793      $157,059       $  -0-            165,754              --
President and Chief              1997      176,261        79,076          -0-             84,421              --
Executive Officer and            1996      165,000        82,500          -0-             66,667              --
Director

EVAN J. MCDOWELL                 1998      109,210       110,336(3)       -0-             73,667              --
Vice President, Sales            1997       95,513        33,370          -0-                 --              --
                                 1996           --            --          -0-                 --              --

MARTIN J. SILVER                 1998      165,603        92,340          -0-             85,000          12,157(4)
Chief Financial Officer and      1997      153,118        67,823          -0-             20,000          12,750(5)
Secretary                        1996      140,000        55,800          -0-             20,000              --

DONALD R. OESTREICHER            1998      163,183        46,250          -0-             60,000              --
Vice President, Engineering      1997      144,284        65,570          -0-             23,330              --
                                 1996           --            --          -0-             93,334              --

THOMAS C. MEYER                  1998      142,528        36,500          -0-             71,534              --
President and COO                1997      127,650        58,590          -0-             19,196              --
                                 1996           --            --          -0-             40,001              --
</TABLE>

- ----------

(1)   Pursuant to Instruction to Item 402(b) of Regulation S-K promulgated by
      the Securities and Exchange Commission (the "Commission"), information
      with respect to fiscal years prior to 1996 has not been included as the
      Company was not a reporting company pursuant to Section 13(a) or 15(d) of
      the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and
      the information has not been previously reported to the Commission in
      response to a filing requirement.

(2)   Includes amounts deferred pursuant to the Company's 401(k) Plan.

(3)   Earned as commissions while serving as Vice President of Sales

(4)   Represents forgiveness of $10,000 of principal and approximately $2,157 of
      interest of a loan made in connection with Mr. Silver's relocation to the
      Palo Alto, California area.

(5)   Represents forgiveness of $10,000 of principal and approximately $2,750 of
      interest of a loan made in connection with Mr. Silver's relocation to the
      Palo Alto, California area.


                                       23
<PAGE>   27

Stock Options

      The following table sets forth information concerning stock option grants
made to each of the Named Executive Officers during the year ended December 31,
1998. The Company did not grant any stock appreciation rights ("SARs") during
the year ended December 31, 1998.

                        OPTION GRANTS IN LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                                                                                       Potential
                                                                                                    Realizable Value
                                     Number of        % of                                     at Assumed Rates of Stock
                                    Securities     Total Options                                Price Appreciation for
                                    Underlying      Granted to       Exercise                       Option Term(4)
                                     Options       Employees in      Price Per   Expiration    -----------------------
Name                                Granted(1)    Fiscal Year(2)     Share(3)       Date          5%             10%
- ----                                ----------    --------------     --------    ----------    --------       --------
<S>                                 <C>           <C>                <C>         <C>           <C>            <C>
Mary Ann Byrnes.................       50,000         2.46%            $3.00     09/11/2008    $ 94,334       $239,061
                                      115,754         5.70%            $5.13     12/11/2008    $373,449       $946,393

Evan J. McDowell, Jr............       30,000         1.48%            $3.00     09/11/2008    $ 56,600       $143,437
                                       43,667         2.15%            $5.13     12/11/2008    $140,880       $357,017

Martin J. Silver................       35,000         1.72%            $3.00     09/11/2008    $ 66,034       $167,343
                                       50,000         2.46%            $5.13     12/11/2008    $161,311       $408,795

Donald R. Oestreicher...........       30,000         1.48%            $3.00     09/11/2008    $ 56,600       $143,437
                                       30,000         1.48%            $5.13     12/11/2008    $ 96,787       $245,277

Thomas C. Meyer.................       30,000         1.48%            $3.00     09/11/2008    $ 56,600       $143,437
                                       41,534         2.05%            $5.13     12/11/2008    $133,998       $339,578
</TABLE>

- ----------

(1)   The rights of the optionees vest at various times over a four-year period.
      While the options are fully exercisable upon grant, any shares purchased
      by the optionee which do not vest prior to the termination of the
      optionee's employment may be repurchased by the Company at cost. In
      accordance with the terms of the 1997 Stock Incentive Plan under which the
      options were granted, all rights of the optionee will accelerate and vest
      in full upon an acquisition of the Company unless the options are assumed
      or replaced by or the Company's repurchase rights are assigned to the
      acquiring corporation. Under the terms of the 1997 Stock Incentive Plan,
      following any acquisition of the Company in which the rights of the
      optionees do not accelerate and vest in full, the rights of each optionee
      shall accelerate and vest (or the Company's repurchase rights will lapse
      in the case of exercised options) with respect to one-half of the then
      unvested shares if the employment of the optionee is involuntarily
      terminated within one year of the acquisition.

(2)   The Company granted options to purchase a total of 2,029,748 shares to
      employees in fiscal year 1998. Options for 821,195 of those shares
      represented options issued in replacement of higher-priced options for the
      same number of shares which were cancelled as part of the October and
      December cancellation/regrant programs.

(3)   The exercise price per share of options granted represented the fair
      market value of the underlying shares of Common Stock on the dates the
      respective options were granted as determined by the Board, considering
      all relevant factors. The exercise price may be paid in cash or in shares
      of Common Stock valued at fair market value on the exercise date. The fair
      market value of shares of Common Stock is determined in accordance with
      certain provisions of the 1997 Stock Incentive Plan based on the closing
      selling price of a share of Common Stock on the date in question on the
      Nasdaq National Market. If shares of the Common Stock are neither listed
      or admitted to trading on any stock exchange nor traded on the Nasdaq
      National Market, then the fair market value shall be determined by the
      Plan Administrator after taking into account such factors as the Plan
      Administrator shall deem appropriate.

(4)   The 5% and 10% assumed annual rates of compounded stock price appreciation
      are mandated by rules of the Commission. The price used for computing this
      appreciation is the exercise price of the options, not the price of Common
      Stock in this Offering. There is no assurance provided to any Named
      Executive Officer or any other holder of the Company's securities that the
      actual stock price appreciation over the 10-year option term will be at
      the assumed 5% or 10% levels or at any other defined level.


                                       24
<PAGE>   28

      Option Exercises and Unexercised Option Holdings. The following table
provides information concerning option exercises during 1998 by the Named
Executive Officers and the value of unexercised options held by each of the
Named Executive Officers as of December 31, 1998. No SARs were exercised during
1998 or outstanding as of December 31, 1998.

       AGGREGATE OPTION EXERCISES IN 1998 AND 1998 YEAR-END OPTION VALUES


<TABLE>
<CAPTION>
                                                        Number of Securities
                                                            Underlying                 Value of Unexercised 
                          Shares                       Unexercised Options at           in-the-Money Options 
                         Acquired                        December 31, 1998             at December 31, 1998(3)
                            on          Value      ------------------------------   -----------------------------
Name                     Exercise    Realized(1)   Exercisable(2)   Unexercisable   Exercisable(2)  Unexercisable
- ----                     --------    -----------   --------------   -------------   --------------  -------------
<S>                      <C>         <C>           <C>              <C>             <C>             <C>
Mary Ann Byrnes........     0            $0            165,754             0           $100,000           0
Evan J. McDowell, Jr...     0            $0             73,667             0           $ 60,000           0
Martin J. Silver.......     0            $0             85,000             0           $ 70,000           0
Donald R. Oestreicher..     0            $0             79,278             0           $ 60,000           0
Thomas C. Meyer........     0            $0            146,534             0           $232,804           0
</TABLE>

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

(1)   "Value realized" is calculated on the basis of the fair market value of
      the Common Stock on the date of exercise minus the exercise price and does
      not necessarily indicate that the optionee sold such stock, and does not
      take into account that some of such shares are subject to rights of
      repurchase on the part of the Company which lapse at various times over
      four years after the date of grant.

(2)   The options are immediately exercisable; however, any shares purchased
      upon exercise may be subject to rights of repurchase on the part of the
      Company which lapse at various times over four years after the date of
      grant.

(3)   "Value" is defined as fair market price of the Common Stock at fiscal
      year-end ($5.00) less exercise price.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

      None of the members of the Compensation Committee is an officer or
employee of the Company. No interlocking relationship exists between the
Company's Board or Compensation Committee and the board of directors or
compensation committee of any other company, nor has such an interlocking
relationship existed in the past.

EMPLOYMENT AND CHANGE OF CONTROL ARRANGEMENTS

      Options granted to Named Executive Officers are immediately exercisable;
however, any shares purchased upon exercise are subject to rights of repurchase
on the part of the Company that generally expire over four or five years from
the date of option grant. In accordance with the terms of the 1996 Stock
Option/Stock Issuance Plan and the 1997 Officer Stock Option Plan under which
options were granted to Named Executive Officers, all of the Named Executive
Officers' options will immediately vest and the Company's repurchase rights will
immediately lapse with respect to shares held by the Named Executive Officers
upon an acquisition of the Company, unless the options are assumed or replaced
by, or the Company's repurchase rights are assigned to, the acquiring entity.
Following any acquisition of the Company in which options remain subject to
vesting and repurchase rights do not lapse in the manner provided above, 50% of
a Named Executive Officer's options will vest and the repurchase rights with
respect to 50% of such Named Executive Officer's shares will lapse if the
employment of the Named Executive Officer is involuntarily terminated within 18
months of the acquisition.


                                       25
<PAGE>   29

      Notwithstanding anything to the contrary set forth in the Company's
previous filing under the Securities Act of 1933, as amended (the "Securities
Act"), or the Securities and Exchanges Act of 1934, as amended (the "Exchange
Act"), that might incorporate future filings, including this Proxy Statement, in
whole or in part, the following report and the Performance Graph on page 30
shall not be incorporated into any such filings.

BOARD COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

      The Compensation Committee presents this report regarding compensation for
the Company's executive officers and the Chief Executive Officer of the Company.

      GENERAL COMPENSATION POLICY. The Company's primary objective is to
maximize the value of the Company's shares over time. Accomplishing this
objective requires achieving specific Company milestones and developing and
ultimately marketing superior products that provide cost-effective solutions for
the wireless communications industry. The overall goal of the Compensation
Committee is to develop compensation practices that will allow the Company to
attract and retain the people needed to create, develop, manufacture and market
such products.

      The Company compensates its executive officers with a combination of
salary and incentives designed to focus and balance their efforts on maximizing
both the near-term and long-term financial performance of the Company. In
addition, the Company's compensation structure rewards individual performance
that furthers Company goals. Elements of each officer's compensation include the
following:

            -     Base Salary

            -     Annual Incentives

            -     Long-term Incentives

            -     Benefits

      Each officer's compensation package is designed to provide an
appropriately weighted mix of these elements which cumulatively provides a level
of compensation roughly equivalent to that paid by companies of similar size and
complexity in similar industries.

      BASE SALARY. Base salary and increases in base salary are determined by
individual performance and the salary levels in effect for companies of similar
size and complexity in similar industries. The Compensation Committee attempts
to keep the base salaries of the Company's officers at a level broadly in line
with the median of the salaries of officers in comparative companies. The
Compensation Committee also evaluates individual experience and performance and
specific issues particular to the Company, such as success in raising capital,
creation of stockholder value and achievement of specific Company milestones.
Certain of the companies contained in the survey on which this Compensation
Committee relied are included in the indices used to compare shareholder returns
in the Stock Performance Graph.

      ANNUAL INCENTIVES. Annual Incentives are paid in accordance with an annual
Incentive Compensation Plan. Bonus awards are set at a level competitive among
peer group companies and early-stage high growth technology companies. Potential
cash incentive compensation paid under this plan is set as a significant
percentage of each officers' base salary. All of the incentive compensation is
directly tied to performance and is at risk. Each officer earns incentive
compensation based upon a mix of Company performance and personal performance.
Company performance is measured by achievement of specific Company milestones.
Compensation for personal performance under this plan is awarded by the
Compensation Committee based upon both an objective and subjective evaluation of
the performance of each officer. No incentive compensation is paid for Company
performance or personal performance unless specific Company and individual goals
are achieved during the fiscal year. In 1997, incentive compensation earned by
officers was approximately 45% of base salary.

      LONG-TERM INCENTIVE. Long-term incentive compensation in the form of stock
options is expected to be the largest element of total compensation over time.
Grants of stock options are designed to align the long-term interests of each
officer with the long-term interests of the Company and its stockholders. Stock
options provide each officer with a significant incentive to manage the Company
from the perspective of an owner with an equity stake in the business. The size
of the option grant to each officer is based on the officer's current and
expected future contributions to the business and vesting position. Awards of
stock options are designed to have an expected


                                       26
<PAGE>   30
aggregate exercise value over time equal to a multiple of salary which will
create a significant opportunity for stock ownership, motivation to remain with
the Company and incentive to increase stockholder value.

      BENEFITS. Benefits offered to the Company's officers serve as a safety net
of protection against the financial catastrophes that can result from illness,
disability or death. Benefits offered to the Company's officers are
substantially the same as those offered to all the Company's regular employees.

      CEO COMPENSATION

      In setting compensation payable to the Company's Chief Executive Officer,
Ms. Byrnes, we have sought to be competitive with companies of similar size and
complexity in similar industries. Ms. Byrnes' incentive compensation under the
Company's annual Incentive Compensation Plan is entirely dependent upon the
Company's performance and our evaluation of her personal contribution to the
Company's performance. No incentive compensation is paid to Ms. Byrnes unless
progress is made toward specific Company goals or these goals are achieved
during the fiscal year. In 1998, incentive compensation earned by Ms. Byrnes was
approximately 82% of base salary.

SPECIAL OPTION REGRANT PROGRAM TO NON-OFFICER EMPLOYEES

      During the 1998 fiscal year, the Compensation Committee felt that
circumstances had made it necessary for the Company to implement an option
cancellation/regrant program for all employees of the Company, excluding the
executive officers. Accordingly, on October 2, 1998, each non-officer employee
was given the opportunity to surrender his or her outstanding options under the
Plan with exercise prices in excess of $3.00 per share in return for a new
option grant for the same number of shares but with a lower exercise price of
$2.88 per share, the fair market value per share of the Company's Common Stock
on the regrant date. Each employee eligible for a new option grant was given the
choice of accepting that option with a new vesting schedule in cancellation of
his or her higher-priced option or rejecting the new grant and retaining the
higher-priced option with its original vesting schedule.

      The Compensation Committee determined that this program was necessary
because equity incentives are a significant component of the total compensation
package of each employee and play a substantial role in the Company's ability to
retain the services of individuals essential to the Company's long-term
financial success. The Compensation Committee felt that the Company's ability to
retain employees would be significantly impaired, unless value was restored to
their options in the form of regranted options at the current market price of
the Company's Common Stock. However, in order for the regranted options to serve
their primary purpose of assuring the continued service of each optionee, a new
vesting schedule was imposed with respect to the option shares. Accordingly,
each optionee will only have the opportunity to acquire the option shares at the
lower exercise price if he or she continues in the Company's employ for six
months after the regrant.

      As a result of the new vesting schedules imposed on the regranted options,
the Compensation Committee believes that the program strikes an appropriate
balance between these interests of the option holders and those of the
stockholders. The lower exercise prices in effect under the regranted options
make those options valuable once again to the employees critical to the
Company's financial performance. However, those individuals will enjoy the
benefits of the regranted options only if they in fact remain in the Company's
employ and contribute to the Company's financial success.

SPECIAL OPTION REGRANT PROGRAM TO EXECUTIVE OFFICERS

      During the 1998 fiscal year, the Compensation Committee felt that
circumstances had made it necessary for the Company to implement an option
cancellation/regrant program for the executive officers of the Company.
Accordingly, on December 15, 1998, each executive officer was given the
opportunity to surrender his or her outstanding options under the Plan with
exercise prices in excess of $3.00 per share in return for a new option grant
for the same number of shares but with a lower exercise price of $5.13 per
share, the fair market value per share of the Company's Common Stock on the
regrant date. Each employee eligible for a new option grant was given the choice
of accepting that option with a new vesting schedule in cancellation of his or
her higher-priced option or rejecting the new grant and retaining the
higher-priced option with its original vesting schedule.


                                       27
<PAGE>   31
      The Compensation Committee determined that this program was necessary
because equity incentives are a significant component of the total compensation
package of each executive officer and play a substantial role in the Company's
ability to retain the services of individuals essential to the Company's
long-term financial success. The Compensation Committee felt that the Company's
ability to retain executive officers would be significantly impaired, unless
value was restored to their options in the form of regranted options at the
current market price of the Company's Common Stock. However, in order for the
regranted options to serve their primary purpose of assuring the continued
service of each optionee, a new vesting schedule was imposed with respect to the
option shares. Accordingly, each optionee will only have the opportunity to
acquire the option shares at the lower exercise price if he or she continues in
the Company's employ for eleven months after the regrant.

      As a result of the new vesting schedules imposed on the regranted options,
the Compensation Committee believes that the program strikes an appropriate
balance between these interests of the option holders and those of the
stockholders. The lower exercise prices in effect under the regranted options
make those options valuable once again to the employees critical to the
Company's financial performance. However, those individuals will enjoy the
benefits of the regranted options only if they in fact remain in the Company's
employ and contribute to the Company's financial success.

      COMPLIANCE WITH INTERNAL REVENUE CODE SECTION 162(M). Section 162(m) of
the Internal Revenue Code, enacted in 1993, generally disallows a tax deduction
to publicly-held companies for compensation paid to certain executive officers,
to the extent that compensation exceeds $1 million per officer in any year. The
compensation paid to the Company's executive officers for the 1998 fiscal year
did not exceed the $1 million limit per officer, and it is not expected the
compensation to be paid to the Company's executive officers for the 1999 fiscal
year will exceed that limit. In addition, the Plan is structured so that any
compensation deemed paid to an executive officer in connection with the exercise
of his or her outstanding options under the Plan with an exercise price per
share equal to the fair market value per share of the Common Stock on the grant
date will qualify as performance-based compensation which will not be subject to
the $1 million limitation. Because it is very unlikely that the cash
compensation payable to any of the Company's executive officers in the
foreseeable future will approach the $1 million limit, the Compensation
Committee has decided at this time not to take any other action to limit or
restructure the elements of cash compensation payable to the Company's executive
officers. The Compensation Committee will reconsider this decision should the
individual compensation of any executive officer ever approach the $1 million
level.

      We conclude our report with the acknowledgement that no member of the
Compensation Committee is a current officer or employee of Corsair or any of its
subsidiaries.

      Submitted by the Compensation Committee of the Company's Board of
Directors.

PERFORMANCE GRAPH

      The following graph compares total stockholder returns since the Company
became a reporting company under the Exchange Act to the Nasdaq CRSP Total
Return Index ("Nasdaq Broad Index") for the Nasdaq Stock Market (U.S. Companies)
and the Nasdaq Computer Data and Processing Index ("Nasdaq Computer Index"). The
total return for each of the Company's Common Stock, the Nasdaq Broad Index and
the Nasdaq Computer Index assumes the reinvestment of dividends, although
dividends have not been declared on the Company's Common Stock. The companies
comprising the Nasdaq Computer Index are available upon written request to
Investor Relations at the Company's executive offices. The stockholder return
shown on the graph below is not necessarily indicative of future performance and
the Company will not make or endorse any predictions as to future stockholder
returns.

                                       28
<PAGE>   32

<TABLE>
<CAPTION>
                                     7/29/97        12/31/97         12/31/98
                                     -------        --------         --------
<S>                                  <C>            <C>              <C>
Corsair Communications, Inc.           100             108              33
NASDAQ Stock Market (U.S.)             100             100             139
NASDAQ Computer Manufacturing          100              91             198
</TABLE>

      Notwithstanding anything to the contrary set forth in any of the Company's
previous filings made under the Securities Act of 1933, as amended, or the
Securities Exchange Act of 1934, as amended, that might incorporate future
filings made by the Company under those statutes, neither the preceding Stock
Performance Graph nor the Compensation Committee Report is to be incorporated by
reference into any such prior filings, nor shall such graph or report be
incorporated by reference into any future filings made by the Company under
those statutes.


                                       29
<PAGE>   33
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      Since its formation in December 1994, the Company has issued, in private
placement transactions, shares of its Preferred Stock (as adjusted in price and
number of shares to show the number of shares of Common Stock into which the
Preferred Stock was automatically converted upon the completion of the Company's
initial public offering of its Common Stock) as follows: 5,413,340 shares of
Series A Preferred Stock at a price of $3.00 per share in December 1994;
1,328,084 shares of Series B Preferred Stock at a price of $6.65 per share in
October 1995; 2,424,864 shares of Series C Preferred Stock at a price of $8.25
per share in October 1996; and 266,668 shares of Series D Preferred Stock at a
price of $11.25 per share in March 1997. The purchasers of Preferred Stock
include, among others, the following Directors and holders of more than five
percent of the Company's outstanding stock and their respective affiliates:

<TABLE>
<CAPTION>
                                                                      Preferred Stock
                                                         ---------------------------------------------      Total
Executive Officers, Directors and 5% Stockholders        Series A    Series B    Series C     Series D   Consideration
- -------------------------------------------------        --------    --------    --------     --------   -------------
<S>                                                      <C>         <C>         <C>          <C>        <C>
Kevin R. Compton(1)..................................    1,333,334    248,308     121,212        --       $6,650,001
Stephen M. Dow(2)....................................    1,333,334     37,624      60,606        --        4,750,002
David H. Ring(3).....................................           --      7,526       6,062        --          100,002
Entities affiliated with Kleiner Perkins
   Caufield & Byers(1)...............................    1,333,334    248,308     121,212        --        6,650,001
Entities affiliated with Sevin Rosen Funds(2)........    1,333,334     37,624      60,606        --        4,750,002
Entities affiliated with Norwest Equity Partners(4)..    1,066,768    165,538     207,274        --        6,010,300
TRW Inc.(3)..........................................    1,346,568         --          --        --        4,039,700
</TABLE>

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

(1)   Includes 1,693,616 shares purchased by Kleiner Perkins Caufield & Byers
      VII and 9,238 shares purchased by KPCB Information Sciences Zaibatsu Fund
      II. Mr. Compton is a Director of the Company and a general partner of each
      of Kleiner Perkins Caufield & Byers VII and KPCB Information Sciences
      Zaibatsu Fund II. Mr. Compton disclaims beneficial ownership of such
      shares except to the extent of his pecuniary interest therein.

(2)   Includes 1,428,230 shares purchased by Sevin Rosen Fund IV L.P. and 3,334
      shares purchased by Sevin Rosen Bayless Management Company. Mr. Dow is a
      Director of the Company, a general partner of SRB Associates IV L.P., the
      general partner of Sevin Rosen Fund IV L.P., and an officer of Sevin Rosen
      Bayless Management Company. Mr. Dow disclaims beneficial ownership of such
      shares except to the extent of his pecuniary interest therein.

(3)   Includes 7,526 shares purchased by Eureka Investments, L.P. and 6,062
      shares purchased by the David H. Ring Charitable Remainder Unitrust. Mr.
      Ring is a director of the Company, a general partner of Eureka
      Investments, L.P. and the trustee of the David H. Ring Charitable
      Remainder Unitrust. Mr. Ring disclaims beneficial ownership of the shares
      held by Eureka Investments, L.P. and the David H. Ring Charitable
      Remainder Unitrust except to the extent of his pecuniary interest therein.

(4)   Includes 1,066,768 shares purchased by Norwest Equity Partners, IV and
      372,812 shares purchased by Norwest Equity Partners, V.

      Holders of Preferred Stock are entitled to certain registration rights
with respect to the Common Stock issued or issuable upon conversion thereof.

      In December 1994, the Company sold 5,413,340 shares of its Series A
Preferred Stock to ESL Incorporated ("ESL"), a subsidiary of TRW Inc., and
various venture capital funds, including funds which are principal stockholders
of the Company and/or are affiliated with directors of the Company, in a private
placement pursuant to which the Company received $13,240,000 and various
promissory notes in the aggregate principal amount of $3,000,000, bearing
interest at a rate of 6.34% per annum. All principal and interest accrued with
respect to the notes has been repaid to the Company and the notes have been
cancelled.

      In December 1994, the Company purchased from ESL certain in-process
research and development and assets relating to wireless telecommunications
fraud prevention, including its rights and obligations under a certain
Development and License Agreement with AirTouch Communications, Inc. (the
"Acquired Technology"), in exchange for $6,240,000 and a promissory note in the
principal amount of $3,000,000 bearing interest at a rate of 6.66% per annum
(the "$3,000,000 Note"). In connection with its purchase of the Acquired
Technology, the Company also obtained a perpetual license with respect to
certain trade secrets and know-how related to the Acquired Technology for use in
the fields of wireless telecommunications, transportation and systems
integration


                                       30
<PAGE>   34
(the "License"). The price of the Acquired Technology and the License was
determined based on negotiations between the Company and ESL, and was not fixed
based on a third party's independent appraisal. All principal and interest with
respect to the $3,000,000 Note has been repaid by the Company and the $3,000,000
Note has been cancelled.

      In December 1994, in connection with the purchase of the Acquired
Technology, the Company entered into an Assignment and Assumption Agreement with
ESL providing for the assignment to the Company of and the assumption by the
Company of all of ESL's right, title and interest under a certain lease with
Westminster Management Corporation (the "Lease") with respect to a certain
facility located at 207 East Java Drive in Sunnyvale, California.
The Lease expired on February 15, 1995.

      In April 1996, the Company made a loan in the amount of $100,000 to Martin
J. Silver, the Chief Financial Officer of the Company, which loan is represented
by two promissory notes, each in the principal amount of $50,000, and was
secured pursuant to a Deed of Trust by Mr. Silver's residence. Both promissory
notes bore annual interest at the greater of 5.5% or the lowest applicable
federal rate of interest as published by the Internal Revenue Service. One of
the promissory notes was to be forgiven at a rate of 20% per year on each
anniversary date of such note for so long as Mr. Silver continued to be employed
as a full-time employee of the Company, and otherwise the outstanding principal
and accrued interest with respect to such note was due and payable upon the
expiration of the 60-day period following the date Mr. Silver ceases to be a
full-time employee of the Company. Both of these promissory notes have been
repaid by Mr. Silver in full.

      In November 1996, the Company made a loan in the amount of $200,000
bearing interest at the rate of 7% per annum to Mary Ann Byrnes, the President
and Chief Executive Officer of the Company, which loan was represented by a
promissory note and was secured pursuant to a pledge agreement by 370,101 shares
of Common Stock of the Company held by Ms. Byrnes. Ms. Byrnes has repaid the
principal and interest due under this note and the Company has released the
pledged shares.

      All of the Company's officers are employed by the Company at will. The
Company has entered into indemnification agreements with each of its directors
and executive officers.

      The Company believes that all of the transactions set forth above were
initially made on terms no less favorable to the Company than could have been
obtained from unaffiliated third parties. The Company expects that all future
transactions between the Company and its officers, directors and principal
stockholders and their affiliates will be approved in accordance with the
Delaware General Corporation Law by a majority of the Board, as well as by a
majority of the independent and disinterested directors, and will be on terms no
less favorable to the Company than could be obtained from unaffiliated third
parties.

                COMPLIANCE WITH SECTION 16(a) OF THE EXCHANGE ACT

      The members of the Board of Directors, the executive officers of the
Company and persons who hold more than 10% of the Company's outstanding Common
Stock are subject to the reporting requirements of Section 16(a) of the
Securities Exchange Act of 1934 which require them to file reports with respect
to their ownership of the Common Stock and their transactions in such Common
Stock. Based solely on a review of the copies of such reports furnished to the
Company, or written representations that no Form 5s were required, Corsair
believes that, during the period from January 1, 1998 through December 31, 1998,
all reporting requirements under Section 16(a) were met in a timely manner by
its directors, executive officers and greater than ten percent beneficial owners
except for Mary Ann Byrnes, Evan J. McDowell, Jr., Thomas C. Meyer, Donald R.
Oestreicher, Walter Price, Jeannette D. Robinson, John Scott, Martin J. Silver
and David Thompson for transactions that occurred during February 1998. These
Form 4s were required to be filed by March 10, 1998, but were filed on March 11,
1998.

                 STOCKHOLDER PROPOSALS FOR 2000 PROXY STATEMENT

      Proposals of stockholders of the Company that are intended to be presented
by such stockholders at the Company's 2000 Annual Meeting must be received no
later than January 11, 2000, in order that they may be included in the proxy
statement and form of proxy relating to that meeting. In addition, the proxy
solicited by the Board of Directors for the 2000 Annual Meeting will confer
discretionary authority to vote on any stockholder


                                       31
<PAGE>   35
proposal presented at that meeting, unless the Company receives notice of such
proposal not later than March 26, 2000.

                                  ANNUAL REPORT

      A copy of the Annual Report of the Company for the 1998 fiscal year has
been mailed concurrently with this Proxy Statement to all stockholders entitled
to notice of and to vote at the Annual Meeting. The Annual Report is not
incorporated into this Proxy Statement and is not considered proxy solicitation
material.

      THE COMPANY FILED AN ANNUAL REPORT ON FORM 10-K WITH THE SECURITIES AND
EXCHANGE COMMISSION ON OR ABOUT APRIL 9, 1999. STOCKHOLDERS MAY OBTAIN A COPY OF
THIS REPORT, INCLUDING THE FINANCIAL STATEMENTS, SCHEDULES AND LIST OF EXHIBITS,
WITHOUT CHARGE, BY WRITING TO MARTIN J. SILVER, CHIEF FINANCIAL OFFICER AND
DIRECTOR OF FINANCE AND ADMINISTRATION OF THE COMPANY, AT THE COMPANY'S
PRINCIPAL EXECUTIVE OFFICES LOCATED AT 3408 HILLVIEW AVENUE, PALO ALTO,
CALIFORNIA 94304.

                                  OTHER MATTERS

      The Board of Directors is not aware of any matter to be presented for
action at the meeting other than the matters set forth in this Proxy Statement.
Should any other matter requiring a vote of the stockholders arise, the persons
named as proxies on the enclosed proxy card will vote the shares represented
thereby in accordance with their best judgment in the interest of the Company.
Discretionary authority with respect to such other matters is granted by the
execution of the enclosed proxy card.

                                    By Order of the Board of Directors

                                    /s/ MARTIN J. SILVER

Dated:  May 10, 1999                Martin J. Silver
                                    Secretary




                                       32
<PAGE>   36
                                                                      Appendix A


                          CORSAIR COMMUNICATIONS, INC.

                            1997 STOCK INCENTIVE PLAN


                                   ARTICLE ONE

                               GENERAL PROVISIONS

     I.   PURPOSE OF THE PLAN

          This 1997 Stock Incentive Plan is intended to promote the interests of
Corsair Communications, Inc., a Delaware corporation, by providing eligible
persons with the opportunity to acquire a proprietary interest, or otherwise
increase their proprietary interest, in the Corporation as an incentive for them
to remain in the service of the Corporation.

          Capitalized terms shall have the meanings assigned to such terms in
the attached Appendix.

     II.  STRUCTURE OF THE PLAN

          A. The Plan shall be divided into four separate equity programs:

               - the Discretionary Option Grant Program under which eligible
persons may, at the discretion of the Plan Administrator, be granted options to
purchase shares of Common Stock,

               - the Salary Investment Option Grant Program under which eligible
employees may elect to have a portion of their base salary invested each year in
special option grants,

               - the Stock Issuance Program under which eligible persons may, at
the discretion of the Plan Administrator, be issued shares of Common Stock
directly, either through the immediate purchase of such shares or as a bonus for
services rendered the Corporation (or any Parent or Subsidiary), and

               - the Automatic Option Grant Program under which eligible non-
employee Board members shall automatically receive option grants at periodic
intervals to purchase shares of Common Stock.

          B. The provisions of Articles One and Six shall apply to all equity
programs under the Plan and shall govern the interests of all persons under the
Plan.

     III.  ADMINISTRATION OF THE PLAN

<PAGE>   37

          A. Prior to the Section 12 Registration Date, the Discretionary Option
Grant and Stock Issuance Programs shall be administered by the Board. Beginning
with the Section 12 Registration Date, the Primary Committee shall have sole and
exclusive authority to administer the Discretionary Option Grant and Stock
Issuance Programs with respect to Section 16 Insiders and shall have sole and
exclusive authority to administer the Salary Investment Option Grant Program
with respect to all eligible individuals.

          B. Administration of the Discretionary Option Grant and Stock Issuance
Programs with respect to all other persons eligible to participate in those
programs may, at the Board's discretion, be vested in the Primary Committee or a
Secondary Committee, or the Board may retain the power to administer those
programs with respect to all such persons. The members of the Secondary
Committee may be Board members who are Employees eligible to receive
discretionary option grants or direct stock issuances under the Plan or any
other stock option, stock appreciation, stock bonus or other stock plan of the
Corporation (or any Parent or Subsidiary).

          C. Members of the Primary Committee or any Secondary Committee shall
serve for such period of time as the Board may determine and may be removed by
the Board at any time. The Board may also at any time terminate the functions of
any Secondary Committee and reassume all powers and authority previously
delegated to such committee.

          D. Each Plan Administrator shall, within the scope of its
administrative functions under the Plan, have full power and authority (subject
to the provisions of the Plan) to establish such rules and regulations as it may
deem appropriate for proper administration of the Discretionary Option Grant,
Salary Investment Option Grant and Stock Issuance Programs and to make such
determinations under, and issue such interpretations of, the provisions of such
programs and any outstanding options or stock issuances thereunder as it may
deem necessary or advisable. Decisions of the Plan Administrator within the
scope of its administrative functions under the Plan shall be final and binding
on all parties who have an interest in the Discretionary Option Grant, Salary
Investment Option Grant and Stock Issuance Programs under its jurisdiction or
any option or stock issuance thereunder.

          E. Service on the Primary Committee or the Secondary Committee shall
constitute service as a Board member, and members of each such committee shall
accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee. No member of the Primary Committee
or the Secondary Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

          F. Administration of the Automatic Option Grant Program shall be
self-executing in accordance with the terms of that program, and no Plan
Administrator shall exercise any discretionary functions with respect to any
option grants or stock issuances made under this program.

<PAGE>   38
     IV.  ELIGIBILITY

          A. The persons eligible to participate in the Discretionary Option
Grant and Stock Issuance Programs are as follows:

               (i) Employees,

               (ii) non-employee members of the Board or the board of directors
     of any Parent or Subsidiary, and

               (iii) consultants and other independent advisors who provide
     services to the Corporation (or any Parent or Subsidiary).

          B. Only Employees who are Section 16 Insiders and other highly
compensated Employees shall be eligible to participate in the Salary Investment
Option Grant Program.

          C. Each Plan Administrator shall, within the scope of its
administrative jurisdiction under the Plan, have full authority to determine,
(i) with respect to the option grants under the Discretionary Option Grant
Program, which eligible persons are to receive option grants, the time or times
when such option grants are to be made, the number of shares to be covered by
each such grant, the status of the granted option as either an Incentive Option
or a Non-Statutory Option, the time or times when each option is to become
exercisable, the vesting schedule (if any) applicable to the option shares and
the maximum term for which the option is to remain outstanding and (ii) with
respect to stock issuances under the Stock Issuance Program, which eligible
persons are to receive stock issuances, the time or times when such issuances
are to be made, the number of shares to be issued to each Participant, the
vesting schedule (if any) applicable to the issued shares and the consideration
for such shares.

          D. The Plan Administrator shall have the absolute discretion either to
grant options in accordance with the Discretionary Option Grant Program or to
effect stock issuances in accordance with the Stock Issuance Program.

          E. The individuals who shall be eligible to participate in the
Automatic Option Grant Program shall be limited to non-employee Board members
who are elected or appointed to the Board after the Effective Date. A non-
employee Board member who has previously been in the employ of the Corporation
(or any Parent or Subsidiary) shall not be eligible to receive an option grant
under the Automatic Option Grant Program at the time he or she first becomes a
non-employee Board member, but shall be eligible to receive periodic option
grants under the Automatic Option Grant Program while he or she continues to
serve as a non-employee Board member.

     V.   STOCK SUBJECT TO THE PLAN

<PAGE>   39

          A. The stock issuable under the Plan shall be shares of authorized but
unissued or reacquired Common Stock, including shares repurchased by the
Corporation on the open market. The maximum number of shares of Common Stock
initially reserved for issuance over the term of the Plan is 3,337,633 shares of
Common Stock. Such share reserve includes an increase of 750,000 shares
authorized by the Board on March 25, 1999, subject to stockholder approval at
the 1999 Annual Meeting. On the first day of each calendar year, beginning with
the 1998 calendar year, the share reserve for the Plan will increase by an
amount equal to 2.0% of the shares of Common Stock outstanding on December 31 of
the immediately preceding calendar year. The additional shares will also require
registration with the SEC on a Form S-8 Registration Statement and may be used
only for the grant of non-statutory stock options.

          B. No one person participating in the Plan may receive options,
separately exercisable stock appreciation rights and direct stock issuances for
more than 500,000 shares of Common Stock in the aggregate per calendar year,
beginning with the 1997 calendar year.

          C. Shares of Common Stock subject to outstanding options (including
options incorporated into this Plan from the Predecessor Plans) shall be
available for subsequent issuance under the Plan to the extent those options
expire or terminate for any reason prior to exercise in full. Unvested shares
issued under the Plan and subsequently cancelled or repurchased by the
Corporation, at the original issue price paid per share, pursuant to the
Corporation's repurchase rights under the Plan shall be added back to the number
of shares of Common Stock reserved for issuance under the Plan and shall
accordingly be available for reissuance through one or more subsequent option
grants or direct stock issuances under the Plan. However, should the exercise
price of an option under the Plan be paid with shares of Common Stock or should
shares of Common Stock otherwise issuable under the Plan be withheld by the
Corporation in satisfaction of the withholding taxes incurred in connection with
the exercise of an option or the vesting of a stock issuance under the Plan,
then the number of shares of Common Stock available for issuance under the Plan
shall be reduced by the gross number of shares for which the option is exercised
or which vest under the stock issuance, and not by the net number of shares of
Common Stock issued to the holder of such option or stock issuance.

          D. If any change is made to the Common Stock by reason of any stock
split, stock dividend, recapitalization, combination of shares, exchange of
shares or other change affecting the outstanding Common Stock as a class without
the Corporation's receipt of consideration, appropriate adjustments shall be
made to (i) the maximum number and/or class of securities issuable under the
Plan, (ii) the number and/or class of securities for which any one person may be
granted stock options, separately exercisable stock appreciation rights and
direct stock issuances under this Plan per calendar year, (iii) the number
and/or class of securities for which grants are subsequently to be made under
the Automatic Option Grant Program to new and continuing non-employee Board
members, (iv) the number and/or class of securities and the exercise price per
share in effect under each outstanding option under the Plan and (v) the number
and/or class of securities and price per share in effect under each outstanding
option incorporated into this Plan from

<PAGE>   40
the Predecessor Plans. Such adjustments to the outstanding options are to be
effected in a manner which shall preclude the enlargement or dilution of rights
and benefits under such options. The adjustments determined by the Plan
Administrator shall be final, binding and conclusive.

                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM

     I.   OPTION TERMS

          Each option shall be evidenced by one or more documents in the form
approved by the Plan Administrator; provided, however, that each such document
shall comply with the terms specified below. Each document evidencing an
Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

          A.   EXERCISE PRICE.

          1. The exercise price per share shall be fixed by the Plan
Administrator but shall not be less than eighty-five percent (85%) of the Fair
Market Value per share of Common Stock on the option grant date.

          2. The exercise price shall become immediately due upon exercise of
the option and shall, subject to the provisions of Section I of Article Six and
the documents evidencing the option, be payable in one or more of the forms
specified below:

               (i) cash or check made payable to the Corporation,

               (ii) shares of Common Stock held for the requisite period
     necessary to avoid a charge to the Corporation's earnings for financial
     reporting purposes and valued at Fair Market Value on the Exercise Date, or

               (iii) to the extent the option is exercised for vested shares,
     through a special sale and remittance procedure pursuant to which the
     Optionee shall concurrently provide irrevocable written instructions to (a)
     a Corporation-designated brokerage firm to effect the immediate sale of the
     purchased shares and remit to the Corporation, out of the sale proceeds
     available on the settlement date, sufficient funds to cover the aggregate
     exercise price payable for the purchased shares plus all applicable
     Federal, state and local income and employment taxes required to be
     withheld by the Corporation by reason of such exercise and (b) the
     Corporation to deliver the certificates for the purchased shares directly
     to such brokerage firm in order to complete the sale.

          Except to the extent such sale and remittance procedure is utilized,
payment of the

<PAGE>   41
exercise price for the purchased shares must be made on the Exercise Date.

          B. EXERCISE AND TERM OF OPTIONS. Each option shall be exercisable at
such time or times, during such period and for such number of shares as shall be
determined by the Plan Administrator and set forth in the documents evidencing
the option. However, no option shall have a term in excess of ten (10) years
measured from the option grant date.

          C.   EFFECT OF TERMINATION OF SERVICE.

               1. The following provisions shall govern the exercise of any
options held by the Optionee at the time of cessation of Service or death:

               (i) Any option outstanding at the time of the Optionee's
     cessation of Service for any reason shall remain exercisable for such
     period of time thereafter as shall be determined by the Plan Administrator
     and set forth in the documents evidencing the option, but no such option
     shall be exercisable after the expiration of the option term.

               (ii) Any option exercisable in whole or in part by the Optionee
     at the time of death may be subsequently exercised by the personal
     representative of the Optionee's estate or by the person or persons to whom
     the option is transferred pursuant to the Optionee's will or in accordance
     with the laws of descent and distribution.

               (iii) Should the Optionee's Service be terminated for Misconduct,
     then all outstanding options held by the Optionee shall terminate
     immediately and cease to be outstanding.

               (iv) During the applicable post-Service exercise period, the
     option may not be exercised in the aggregate for more than the number of
     vested shares for which the option is exercisable on the date of the
     Optionee's cessation of Service. Upon the expiration of the applicable
     exercise period or (if earlier) upon the expiration of the option term, the
     option shall terminate and cease to be outstanding for any vested shares
     for which the option has not been exercised. However, the option shall,
     immediately upon the Optionee's cessation of Service, terminate and cease
     to be outstanding to the extent the option is not otherwise at that time
     exercisable for vested shares.

               2. The Plan Administrator shall have complete discretion,
exercisable either at the time an option is granted or at any time while the
option remains outstanding, to:

                    (i) extend the period of time for which the option is to
     remain exercisable following the Optionee's cessation of Service from the
     limited exercise period otherwise in effect for that option to such greater

<PAGE>   42
     period of time as the Plan Administrator shall deem appropriate, but in no
     event beyond the expiration of the option term, and/or

                    (ii) permit the option to be exercised, during the
     applicable post-Service exercise period, not only with respect to the
     number of vested shares of Common Stock for which such option is
     exercisable at the time of the Optionee's cessation of Service but also
     with respect to one or more additional installments in which the Optionee
     would have vested had the Optionee continued in Service.

          D. STOCKHOLDER RIGHTS. The holder of an option shall have no
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

          E. REPURCHASE RIGHTS. The Plan Administrator shall have the discretion
to grant options which are exercisable for unvested shares of Common Stock.
Should the Optionee cease Service while holding such unvested shares, the
Corporation shall have the right to repurchase, at the exercise price paid per
share, any or all of those unvested shares. The terms upon which such repurchase
right shall be exercisable (including the period and procedure for exercise and
the appropriate vesting schedule for the purchased shares) shall be established
by the Plan Administrator and set forth in the document evidencing such
repurchase right.

          F. LIMITED TRANSFERABILITY OF OPTIONS. During the lifetime of the
Optionee, Incentive Options shall be exercisable only by the Optionee and shall
not be assignable or transferable other than by will or by the laws of descent
and distribution following the Optionee's death. However, subject to the express
terms of the Option Agreement, a Non-Statutory Option may be assigned in whole
or in part during the Optionee's lifetime with the prior consent of the Plan
Administrator. The assigned portion may only be exercised by the person or
persons who acquire a proprietary interest in the option pursuant to the
assignment. The terms applicable to the assigned portion shall be the same as
those in effect for the option immediately prior to such assignment and shall be
set forth in such documents issued to the assignee as the Plan Administrator may
deem appropriate.

     II.  INCENTIVE OPTIONS

          The terms specified below shall be applicable to all Incentive
Options. Except as modified by the provisions of this Section II, all the
provisions of Articles One, Two and Six shall be applicable to Incentive
Options. Options which are specifically designated as Non-Statutory Options when
issued under the Plan shall not be subject to the terms of this Section II.

          A. ELIGIBILITY. Incentive Options may only be granted to Employees.

<PAGE>   43
          B. EXERCISE PRICE. The exercise price per share shall not be less than
one hundred percent (100%) of the Fair Market Value per share of Common Stock on
the option grant date.

          C. DOLLAR LIMITATION. The aggregate Fair Market Value of the shares of
Common Stock (determined as of the respective date or dates of grant) for which
one or more options granted to any Employee under the Plan (or any other option
plan of the Corporation or any Parent or Subsidiary) may for the first time
become exercisable as Incentive Options during any one calendar year shall not
exceed the sum of One Hundred Thousand Dollars ($100,000). To the extent the
Employee holds two (2) or more such options which become exercisable for the
first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

          D. 10% STOCKHOLDER. If any Employee to whom an Incentive Option is
granted is a 10% Stockholder, then the exercise price per share shall not be
less than one hundred ten percent (110%) of the Fair Market Value per share of
Common Stock on the option grant date, and the option term shall not exceed five
(5) years measured from the option grant date.

     III. CORPORATE TRANSACTION/CHANGE IN CONTROL

          A. In the event of any Corporate Transaction, each outstanding option
shall automatically accelerate so that each such option shall, immediately prior
to the effective date of the Corporate Transaction, become fully exercisable
with respect to the total number of shares of Common Stock at the time subject
to such option and may be exercised for any or all of those shares as
fully-vested shares of Common Stock. However, an outstanding option shall not so
accelerate if and to the extent: (i) such option is, in connection with the
Corporate Transaction, either to be assumed by the successor corporation (or
parent thereof) or to be replaced with a comparable option to purchase shares of
the capital stock of the successor corporation (or parent thereof), (ii) such
option is to be replaced with a cash incentive program of the successor
corporation which preserves the spread existing on the unvested option shares at
the time of the Corporate Transaction and provides for subsequent payout in
accordance with the same vesting schedule applicable to those option shares or
(iii) the acceleration of such option is subject to other limitations imposed by
the Plan Administrator at the time of the option grant. The determination of
option comparability under clause (i) above shall be made by the Plan
Administrator, and its determination shall be final, binding and conclusive.

          B. All outstanding repurchase rights shall terminate automatically,
and the shares of Common Stock subject to those terminated rights shall
immediately vest in full, in the event of any Corporate Transaction, except to
the extent: (i) those repurchase rights are to be assigned to the successor
corporation (or parent thereof) in connection with such Corporate Transaction or
(ii) such accelerated vesting is precluded by other limitations imposed by the
Plan Administrator at the time the repurchase right is issued.

<PAGE>   44

          C. Immediately following the consummation of the Corporate
Transaction, all outstanding options shall terminate and cease to be
outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

          D. Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments to reflect such Corporate Transaction shall also be made
to (i) the exercise price payable per share under each outstanding option,
provided the aggregate exercise price payable for such securities shall remain
the same, (ii) the maximum number and/or class of securities available for
issuance over the remaining term of the Plan and (iii) the maximum number and/or
class of securities for which any one person may be granted stock options,
separately exercisable stock appreciation rights and direct stock issuances
under the Plan per calendar year.

          E. The Plan Administrator shall have full power and authority to grant
options under the Discretionary Option Grant Program which will automatically
accelerate in the event the Optionee's Service subsequently terminates by reason
of an Involuntary Termination within a designated period (not to exceed eighteen
(18) months) following the effective date of any Corporate Transaction in which
those options are assumed or replaced and do not otherwise accelerate. Any
options so accelerated shall remain exercisable for fully-vested shares until
the earlier of (i) the expiration of the option term or (ii) the expiration of
the one (1)-year period measured from the effective date of the Involuntary
Termination. In addition, the Plan Administrator may provide that one or more of
the Corporation's outstanding repurchase rights with respect to shares held by
the Optionee at the time of such Involuntary Termination shall immediately
terminate, and the shares subject to those terminated repurchase rights shall
accordingly vest in full.

          F. The Plan Administrator shall have full power and authority to grant
options under the Discretionary Option Grant Program which will automatically
accelerate in the event the Optionee's Service subsequently terminates by reason
of an Involuntary Termination within a designated period (not to exceed eighteen
(18) months) following the effective date of any Change in Control. Each option
so accelerated shall remain exercisable for fully- vested shares until the
earlier of (i) the expiration of the option term or (ii) the expiration of the
one (1)-year period measured from the effective date of the Involuntary
Termination. In addition, the Plan Administrator may provide that one or more of
the Corporation's outstanding repurchase rights with respect to shares held by
the Optionee at the time of such Involuntary Termination shall immediately
terminate, and the shares subject to those terminated repurchase rights shall
accordingly vest in full.

          G. The portion of any Incentive Option accelerated in connection with
a Corporate Transaction or Change in Control shall remain exercisable as an
Incentive Option only to the extent the applicable One Hundred Thousand Dollar
limitation is not exceeded. To the extent such dollar limitation is exceeded,
the accelerated portion of

<PAGE>   45
such option shall be exercisable as a Non-Statutory Option under the Federal tax
laws.

          H. The outstanding options shall in no way affect the right of the
Corporation to adjust, reclassify, reorganize or otherwise change its capital or
business structure or to merge, consolidate, dissolve, liquidate or sell or
transfer all or any part of its business or assets.

     IV.  CANCELLATION AND REGRANT OF OPTIONS

          The Plan Administrator shall have the authority to effect, at any time
and from time to time, with the consent of the affected option holders, the
cancellation of any or all outstanding options under the Discretionary Option
Grant Program (including outstanding options incorporated from the Predecessor
Plans) and to grant in substitution new options covering the same or different
number of shares of Common Stock but with an exercise price per share based on
the Fair Market Value per share of Common Stock on the new grant date.

     V.   STOCK APPRECIATION RIGHTS

          A. The Plan Administrator shall have full power and authority to grant
to selected Optionees tandem stock appreciation rights and/or limited stock
appreciation rights.

          B. The following terms shall govern the grant and exercise of tandem
stock appreciation rights:

                    (i) One or more Optionees may be granted the right,
     exercisable upon such terms as the Plan Administrator may establish, to
     elect between the exercise of the underlying option for shares of Common
     Stock and the surrender of that option in exchange for a distribution from
     the Corporation in an amount equal to the excess of (a) the Fair Market
     Value (on the option surrender date) of the number of shares in which the
     Optionee is at the time vested under the surrendered option (or surrendered
     portion thereof) over (b) the aggregate exercise price payable for such
     shares.

                    (ii) No such option surrender shall be effective unless it
     is approved by the Plan Administrator, either at the time of the actual
     option surrender or at any earlier time. If the surrender is so approved,
     then the distribution to which the Optionee shall be entitled may be made
     in shares of Common Stock valued at Fair Market Value on the option
     surrender date, in cash, or partly in shares and partly in cash, as the
     Plan Administrator shall in its sole discretion deem appropriate.

                    (iii) If the surrender of an option is not approved by the
     Plan Administrator, then the Optionee shall retain whatever rights the
     Optionee had under the surrendered option (or surrendered portion thereof)

<PAGE>   46
     on the option surrender date and may exercise such rights at any time prior
     to the later of (a) five (5) business days after the receipt of the
     rejection notice or (b) the last day on which the option is otherwise
     exercisable in accordance with the terms of the documents evidencing such
     option, but in no event may such rights be exercised more than ten (10)
     years after the option grant date.

          C. The following terms shall govern the grant and exercise of limited
stock appreciation rights:

                    (i) One or more Section 16 Insiders may be granted limited
     stock appreciation rights with respect to their outstanding options.

                    (ii) Upon the occurrence of a Hostile Take-Over, each
     individual holding one or more options with such a limited stock
     appreciation right shall have the unconditional right (exercisable for a
     thirty (30)-day period following such Hostile Take-Over) to surrender each
     such option to the Corporation, to the extent the option is at the time
     exercisable for vested shares of Common Stock. In return for the
     surrendered option, the Optionee shall receive a cash distribution from the
     Corporation in an amount equal to the excess of (A) the Take-Over Price of
     the shares of Common Stock which are at the time vested under each
     surrendered option (or surrendered portion thereof) over (B) the aggregate
     exercise price payable for such shares. Such cash distribution shall be
     paid within five (5) days following the option surrender date.

                    (iii) Neither the approval of the Plan Administrator nor the
     consent of the Board shall be required in connection with such option
     surrender and cash distribution.

                    (iv) The balance of the option (if any) shall remaining
     outstanding and exercisable in accordance with the documents evidencing
     such option.

                                  ARTICLE THREE

                     SALARY INVESTMENT OPTION GRANT PROGRAM

     I.   OPTION GRANTS

          The Primary Committee shall have the sole and exclusive authority to
determine the calendar year or years (if any) for which the Salary Investment
Option Grant Program is to be in effect and to select the Section 16 Insiders
and other highly compensated Employees eligible to participate in the Salary
Investment Option Grant Program for

<PAGE>   47
those calendar year or years. Each selected individual who elects to participate
in the Salary Investment Option Grant Program must, prior to the start of each
calendar year of participation, file with the Plan Administrator (or its
designate) an irrevocable authorization directing the Corporation to reduce his
or her base salary for that calendar year by an amount not less than Ten
Thousand Dollars ($10,000.00) nor more than Fifty Thousand Dollars ($50,000.00).
The Primary Committee shall have complete discretion to determine whether to
approve the filed authorization in whole or in part. To the extent the Primary
Committee approves the authorization, the individual who filed that
authorization shall be granted an option under the Salary Investment Grant
Program as soon as possible after the start of the calendar year for which the
salary reduction is to be in effect. All grants under the Salary Investment
Option Grant Program shall be at the sole discretion of the Primary Committee.

     II.  OPTION TERMS

          Each option shall be a Non-Statutory Option evidenced by one or more
documents in the form approved by the Plan Administrator; provided, however,
that each such document shall comply with the terms specified below.

          A.   EXERCISE PRICE.

               1. The exercise price per share shall be equal to the excess of
(i) the Fair Market Value of the Common Stock on the option grant date, over
(ii) the amount of the approved Salary Reduction divided by the number of shares
subject to the Option.

               2. The exercise price shall become immediately due upon exercise
of the option and shall be payable in one or more of the alternative forms
authorized under the Discretionary Option Grant Program. Except to the extent
the sale and remittance procedure specified thereunder is utilized, payment of
the exercise price for the purchased shares must be made on the Exercise Date.

          B. NUMBER OF OPTION SHARES. The number of shares of Common Stock
subject to the option shall be determined pursuant to the following formula
(rounded down to the nearest whole number):

               X = A/(B x C), where

               X is the number of option shares,

               A is the dollar amount of the approved reduction in the
               Optionee's base salary for the calendar year, B is the Fair
               Market Value per share of Common Stock on the option grant date,
               and

               C is a percentage between 33 1/3% and 66 2/3% fixed by the Plan
               Administrator, in its sole discretion, for purposes of the Salary

<PAGE>   48
               Investment Option Grant Program with respect to options to be
               granted during the current year of the Plan.

          C. EXERCISE AND TERM OF OPTIONS. The option shall become exercisable
in a series of twelve (12) successive equal monthly installments upon the
Optionee's completion of each calendar month of Service in the calendar year for
which the salary reduction is in effect. Each option shall have a maximum term
of ten (10) years measured from the option grant date.

          D. EFFECT OF TERMINATION OF SERVICE. Should the Optionee cease Service
for any reason while holding one or more options under this Article Three, then
each such option shall remain exercisable, for any or all of the shares for
which the option is exercisable at the time of such cessation of Service, until
the earlier of (i) the expiration of the ten (10)-year option term or (ii) the
expiration of the three (3)-year period measured from the date of such cessation
of Service. Should the Optionee die while holding one or more options under this
Article Three, then each such option may be exercised, for any or all of the
shares for which the option is exercisable at the time of the Optionee's
cessation of Service (less any shares subsequently purchased by Optionee prior
to death), by the personal representative of the Optionee's estate or by the
person or persons to whom the option is transferred pursuant to the Optionee's
will or in accordance with the laws of descent and distribution. Such right of
exercise shall lapse, and the option shall terminate, upon the earlier of (i)
the expiration of the ten (10)-year option term or (ii) the three (3)-year
period measured from the date of the Optionee's cessation of Service. However,
the option shall, immediately upon the Optionee's cessation of Service for any
reason, terminate and cease to remain outstanding with respect to any and all
shares of Common Stock for which the option is not otherwise at that time
exercisable.

     III. CORPORATE TRANSACTION/CHANGE IN CONTROL

          A. In the event of any Corporate Transaction while the Optionee
remains in Service, each outstanding option held by such Optionee under this
Salary Investment Option Grant Program shall automatically accelerate so that
each such option shall, immediately prior to the effective date of the Corporate
Transaction, become fully exercisable with respect to the total number of shares
of Common Stock at the time subject to such option and may be exercised for any
or all of those shares as fully-vested shares of Common Stock. Each such
outstanding option shall be assumed by the successor corporation (or parent
thereof) in the Corporate Transaction and shall remain exercisable for the
fully-vested shares until the earlier of (i) the expiration of the ten (10)-year
option term or (ii) the expiration of the three (3)-year period measured from
the date of the Optionee's cessation of Service.

          B. In the event of a Change in Control while the Optionee remains in
Service, each outstanding option held by such Optionee under this Salary
Investment Option Grant Program shall automatically accelerate so that each such
option shall immediately become fully exercisable with respect to the total
number of shares of Common Stock at

<PAGE>   49
the time subject to such option and may be exercised for any or all of those
shares as fully-vested shares of Common Stock. Any options not exercised prior
to the Change in Control may be repurchased by the Corporation at the time of
the Change in Control at a repurchase price equal to the salary reduction
incurred in connection with the issuance of the option. Any option which is
neither exercised or repurchased shall remain so exercisable until the earlier
or (i) the expiration of the ten (10)-year option term or (ii) the expiration of
the three (3)-year period measured from the date of the Optionee's cessation of
Service.

          C. The grant of options under the Salary Investment Option Grant
Program shall in no way affect the right of the Corporation to adjust,
reclassify, reorganize or otherwise change its capital or business structure or
to merge, consolidate, dissolve, liquidate or sell or transfer all or any part
of its business or assets.

     IV.  REMAINING TERMS

          The remaining terms of each option granted under the Salary Investment
Option Grant Program shall be the same as the terms in effect for option grants
made under the Discretionary Option Grant Program.

                                  ARTICLE FOUR

                             STOCK ISSUANCE PROGRAM

     I.   STOCK ISSUANCE TERMS

          Shares of Common Stock may be issued under the Stock Issuance Program
through direct and immediate issuances without any intervening option grants.
Each such stock issuance shall be evidenced by a Stock Issuance Agreement which
complies with the terms specified below.

          A.   PURCHASE PRICE.

               1. The purchase price per share shall be fixed by the Plan
Administrator, but shall not be less than one hundred percent (100%) of the Fair
Market Value per share of Common Stock on the issuance date.

               2. Subject to the provisions of Section I of Article Six, shares
of Common Stock may be issued under the Stock Issuance Program for any of the
following items of consideration which the Plan Administrator may deem
appropriate in each individual instance:

                    (i) cash or check made payable to the Corporation, or 

                    (ii) past services rendered to the Corporation (or any
     Parent or Subsidiary).

<PAGE>   50
          B.   VESTING PROVISIONS.

               1. Shares of Common Stock issued under the Stock Issuance Program
may, in the discretion of the Plan Administrator, be fully and immediately
vested upon issuance or may vest in one or more installments over the
Participant's period of Service or upon attainment of specified performance
objectives. The elements of the vesting schedule applicable to any unvested
shares of Common Stock issued under the Stock Issuance Program, namely:

                    (i) the Service period to be completed by the Participant or
     the performance objectives to be attained,

                    (ii) the number of installments in which the shares are to
     vest,

                    (iii) the interval or intervals (if any) which are to lapse
     between installments, and

                    (iv) the effect which death, Permanent Disability or other
     event designated by the Plan Administrator is to have upon the vesting
     schedule, shall be determined by the Plan Administrator and incorporated
     into the Stock Issuance Agreement.

          2. Any new, substituted or additional securities or other property
(including money paid other than as a regular cash dividend) which the
Participant may have the right to receive with respect to the Participant's
unvested shares of Common Stock by reason of any stock dividend, stock split,
recapitalization, combination of shares, exchange of shares or other change
affecting the outstanding Common Stock as a class without the Corporation's
receipt of consideration shall be issued subject to (i) the same vesting
requirements applicable to the Participant's unvested shares of Common Stock and
(ii) such escrow arrangements as the Plan Administrator shall deem appropriate.

          3. The Participant shall have full stockholder rights with respect to
any shares of Common Stock issued to the Participant under the Stock Issuance
Program, whether or not the Participant's interest in those shares is vested.
Accordingly, the Participant shall have the right to vote such shares and to
receive any regular cash dividends paid on such shares.

          4. Should the Participant cease to remain in Service while holding one
or more unvested shares of Common Stock issued under the Stock Issuance Program
or should the performance objectives not be attained with respect to one or more
such unvested shares of Common Stock, then those shares shall be immediately
surrendered to the Corporation for cancellation, and the Participant shall have
no further stockholder rights with respect to those shares. To the extent the
surrendered shares were previously issued to the Participant for consideration
paid in cash or cash equivalent (including the

<PAGE>   51
Participant's purchase-money indebtedness), the Corporation shall repay to the
Participant the cash consideration paid for the surrendered shares and shall
cancel the unpaid principal balance of any outstanding purchase-money note of
the Participant attributable to the surrendered shares.

          5. The Plan Administrator may in its discretion waive the surrender
and cancellation of one or more unvested shares of Common Stock which would
otherwise occur upon the cessation of the Participant's Service or the non-
attainment of the performance objectives applicable to those shares. Such waiver
shall result in the immediate vesting of the Participant's interest in the
shares as to which the waiver applies. Such waiver may be effected at any time,
whether before or after the Participant's cessation of Service or the attainment
or non-attainment of the applicable performance objectives.

     II.  CORPORATE TRANSACTION/CHANGE IN CONTROL

          A. All of the Corporation's outstanding repurchase/cancellation rights
under the Stock Issuance Program shall terminate automatically, and all the
shares of Common Stock subject to those terminated rights shall immediately vest
in full, in the event of any Corporate Transaction, except to the extent (i)
those repurchase/cancellation rights are to be assigned to the successor
corporation (or parent thereof) in connection with such Corporate Transaction or
(ii) such accelerated vesting is precluded by other limitations imposed in the
Stock Issuance Agreement.

          B. The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase/cancellation rights remain outstanding under the
Stock Issuance Program, to provide that those rights shall automatically
terminate in whole or in part, and the shares of Common Stock subject to those
terminated rights shall immediately vest, in the event the Participant's Service
should subsequently terminate by reason of an Involuntary Termination within a
designated period (not to exceed eighteen (18) months) following the effective
date of any Corporate Transaction in which those repurchase/cancellation rights
are assigned to the successor corporation (or parent thereof).

          C. The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase/cancellation rights remain outstanding under the
Stock Issuance Program, to provide that those rights shall automatically
terminate in whole or in part, and the shares of Common Stock subject to those
terminated rights shall immediately vest, in the event the Participant's Service
should subsequently terminate by reason of an Involuntary Termination within a
designated period (not to exceed eighteen (18) months) following the effective
date of any Change in Control.

     III. SHARE ESCROW/LEGENDS

          Unvested shares may, in the Plan Administrator's discretion, be held
in escrow by

<PAGE>   52
the Corporation until the Participant's interest in such shares vests or may be
issued directly to the Participant with restrictive legends on the certificates
evidencing those unvested shares.

                                  ARTICLE FIVE

                         AUTOMATIC OPTION GRANT PROGRAM

     I.   OPTION TERMS

          A. GRANT DATES. On the date of each Annual Stockholders Meeting held
after 1997, option grants shall be made to each Eligible Director who is a
member of the Board immediately after that particular Annual Meeting. Each
automatic option grant shall be a Non-Statutory Option. The number of shares of
Common Stock subject to the option shall be equal to 1,500 shares. There shall
be no limit on the number of such automatic option grants any one Eligible
Director may receive over his or her period of Board service, and non-employee
Board members who have previously been in the employ of the Corporation (or any
Parent or Subsidiary) or who have otherwise received a stock option grant from
the Corporation prior to the Effective Date shall be eligible to receive one or
more such annual option grants over their period of continued Board service.

          B. EXERCISE PRICE.

               1. The exercise price per share shall be equal to one hundred
percent (100%) of the Fair Market Value per share of Common Stock on the option
grant date.

               2. The exercise price shall be payable in one or more of the
alternative forms authorized under the Discretionary Option Grant Program.
Except to the extent the sale and remittance procedure specified thereunder is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

          C. OPTION TERM. Each option shall have a term of ten (10) years
measured from the option grant date.

          D. EXERCISE AND VESTING OF OPTIONS. Each option shall be only with
respect to option shares with respect to which the automatic option grant has
become vested. Provided that the non-employee director continues to be a Member
of the Board, each automatic option grant shall vest in twelve equal monthly
installments commencing with the date which is one month after the date of the
Annual Meeting to which the option grant relates. No portion of the automatic
option grant shall vest after the optionee has ceased to be a member of the
Board.

          E. TERMINATION OF BOARD SERVICE. The following provisions shall govern
the exercise of any options held by the Optionee at the time the Optionee ceases
to serve as a Board member:

<PAGE>   53

                    (i) The Optionee (or, in the event of Optionee's death, the
     personal representative of the Optionee's estate or the person or persons
     to whom the option is transferred pursuant to the Optionee's will or in
     accordance with the laws of descent and distribution) shall have a twelve
     (12)-month period following the date of such cessation of Board service in
     which to exercise each such option.

                    (ii) During the twelve (12)-month exercise period, the
     option may not be exercised in the aggregate for more than the number of
     vested shares of Common Stock for which the option is exercisable at the
     time of the Optionee's cessation of Board service.

                    (iii) Should the Optionee cease to serve as a Board member
     by reason of death or Permanent Disability, then all shares at the time
     subject to the option shall immediately vest so that such option may,
     during the twelve (12)-month exercise period following such cessation of
     Board service, be exercised for all or any portion of those shares as
     fully-vested shares of Common Stock.

                    (iv) In no event shall the option remain exercisable after
     the expiration of the option term. Upon the expiration of the twelve (12)-
     month exercise period or (if earlier) upon the expiration of the option
     term, the option shall terminate and cease to be outstanding for any vested
     shares for which the option has not been exercised. However, the option
     shall, immediately upon the Optionee's cessation of Board service for any
     reason other than death or Permanent Disability, terminate and cease to be
     outstanding to the extent the option is not otherwise at that time
     exercisable for vested shares.

     II.  CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-OVER

          A. In the event of any Corporate Transaction, the shares of Common
Stock at the time subject to each outstanding option but not otherwise vested
shall automatically vest in full so that each such option shall, immediately
prior to the effective date of the Corporate Transaction, become fully
exercisable for all of the shares of Common Stock at the time subject to such
option and may be exercised for all or any portion of those shares as fully-
vested shares of Common Stock. Immediately following the consummation of the
Corporate Transaction, each automatic option grant shall terminate and cease to
be outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

          B. In connection with any Change in Control, the shares of Common
Stock at the time subject to each outstanding option but not otherwise vested
shall automatically vest in full so that each such option shall, immediately
prior to the effective date of the

<PAGE>   54
Change in Control, become fully exercisable for all of the shares of Common
Stock at the time subject to such option and may be exercised for all or any
portion of those shares as fully-vested shares of Common Stock. Each such option
shall remain exercisable for such fully-vested option shares until the
expiration or sooner termination of the option term or the surrender of the
option in connection with a Hostile Take-Over.

          C. Upon the occurrence of a Hostile Take-Over, the Optionee shall have
a thirty (30)-day period in which to surrender to the Corporation each of his or
her outstanding automatic option grants. The Optionee shall in return be
entitled to a cash distribution from the Corporation in an amount equal to the
excess of (i) the Take-Over Price of the shares of Common Stock at the time
subject to each surrendered option (whether or not the Optionee is otherwise at
the time vested in those shares) over (ii) the aggregate exercise price payable
for such shares. Such cash distribution shall be paid within five (5) days
following the surrender of the option to the Corporation. No approval or consent
of the Board or any Plan Administrator shall be required in connection with such
option surrender and cash distribution.

          D. Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to the exercise price payable per
share under each outstanding option, provided the aggregate exercise price
payable for such securities shall remain the same.

          E. The grant of options under the Automatic Option Grant Program shall
in no way affect the right of the Corporation to adjust, reclassify, reorganize
or otherwise change its capital or business structure or to merge, consolidate,
dissolve, liquidate or sell or transfer all or any part of its business or
assets.

     III. REMAINING TERMS

          The remaining terms of each option granted under the Automatic Option
Grant Program shall be the same as the terms in effect for option grants made
under the Discretionary Option Grant Program.

                                   ARTICLE SIX

                                  MISCELLANEOUS

     I.   FINANCING

          The Plan Administrator may permit any Optionee or Participant to pay
the option exercise price under the Discretionary Option Grant Program or the
purchase price of

<PAGE>   55
shares issued under the Stock Issuance Program by delivering a full-recourse,
interest bearing promissory note payable in one or more installments. The terms
of any such promissory note (including the interest rate and the terms of
repayment) shall be established by the Plan Administrator in its sole
discretion. In no event may the maximum credit available to the Optionee or
Participant exceed the sum of (i) the aggregate option exercise price or
purchase price payable for the purchased shares plus (ii) any Federal, state and
local income and employment tax liability incurred by the Optionee or the
Participant in connection with the option exercise or share purchase.

     II.  TAX WITHHOLDING

          A. The Corporation's obligation to deliver shares of Common Stock upon
the exercise of options or the issuance or vesting of such shares under the Plan
shall be subject to the satisfaction of all applicable Federal, state and local
income and employment tax withholding requirements.

          B. The Plan Administrator may, in its discretion, provide any or all
holders of Non-Statutory Options or unvested shares of Common Stock under the
Plan (other than the options granted or the shares issued under the Automatic
Option Grant Program) with the right to use shares of Common Stock in
satisfaction of all or part of the Taxes incurred by such holders in connection
with the exercise of their options or the vesting of their shares. Such right
may be provided to any such holder in either or both of the following formats:

               Stock Withholding: The election to have the Corporation withhold,
from the shares of Common Stock otherwise issuable upon the exercise of such
Non-Statutory Option or the vesting of such shares, a portion of those shares
with an aggregate Fair Market Value equal to the percentage of the Taxes (not to
exceed one hundred percent (100%)) designated by the holder.

               Stock Delivery: The election to deliver to the Corporation, at
the time the Non-Statutory Option is exercised or the shares vest, one or more
shares of Common Stock previously acquired by such holder (other than in
connection with the option exercise or share vesting triggering the Taxes) with
an aggregate Fair Market Value equal to the percentage of the Taxes (not to
exceed one hundred percent (100%)) designated by the holder.

     III. EFFECTIVE DATE AND TERM OF THE PLAN

          A. The Plan shall become effective immediately upon the Plan Effective
Date. However, the Salary Investment Option Grant Program shall not be
implemented until such time as the Primary Committee may deem appropriate.
Options may be granted under the Discretionary Option Grant or Automatic Option
Grant Program at any time on or after the Plan Effective Date. However, no
options granted under the Plan may be exercised, and no shares shall be issued
under the Plan, until the Plan is approved by the Corporation's stockholders. If
such stockholder approval is not obtained within twelve

<PAGE>   56
(12) months after the Plan Effective Date, then all options previously granted
under this Plan shall terminate and cease to be outstanding, and no further
options shall be granted and no shares shall be issued under the Plan.

          B. The Plan shall serve as the successor to the Predecessor Plans, and
no further option grants or direct stock issuances shall be made under the
Predecessor Plans after the Section 12 Registration Date. All options
outstanding under the Predecessor Plans on the Section 12 Registration Date
shall be incorporated into the Plan at that time and shall be treated as
outstanding options under the Plan. However, each outstanding option so
incorporated shall continue to be governed solely by the terms of the documents
evidencing such option, and no provision of the Plan shall be deemed to affect
or otherwise modify the rights or obligations of the holders of such
incorporated options with respect to their acquisition of shares of Common
Stock.

          C. One or more provisions of the Plan, including (without limitation)
the option/vesting acceleration provisions of Article Two relating to Corporate
Transactions and Changes in Control, may, in the Plan Administrator's
discretion, be extended to one or more options incorporated from the Predecessor
Plans which do not otherwise contain such provisions.

          D. The Plan shall terminate upon the earliest of (i) the tenth
anniversary of the Plan Effective Date, (ii) the date on which all shares
available for issuance under the Plan shall have been issued as fully-vested
shares or (iii) the termination of all outstanding options in connection with a
Corporate Transaction. Upon such plan termination, all outstanding option grants
and unvested stock issuances shall thereafter continue to have force and effect
in accordance with the provisions of the documents evidencing such grants or
issuances.

     IV.  AMENDMENT OF THE PLAN

          A. The Board shall have complete and exclusive power and authority to
amend or modify the Plan in any or all respects. However, no such amendment or
modification shall adversely affect the rights and obligations with respect to
stock options or unvested stock issuances at the time outstanding under the Plan
unless the Optionee or the Participant consents to such amendment or
modification. In addition, certain amendments may require stockholder approval
if so determined by the Board or pursuant to applicable laws or regulations.

          B. Options to purchase shares of Common Stock may be granted under the
Discretionary Option Grant and Salary Investment Option Grant Programs and
shares of Common Stock may be issued under the Stock Issuance Program that are
in each instance in excess of the number of shares then available for issuance
under the Plan, provided any excess shares actually issued under those programs
shall be held in escrow until there is obtained any required approval of an
amendment sufficiently increasing the number of shares of Common Stock available
for issuance under the Plan. If such approval is not obtained within twelve (12)
months after the date the first such excess issuances are

<PAGE>   57
made, then (i) any unexercised options granted on the basis of such excess
shares shall terminate and cease to be outstanding and (ii) the Corporation
shall promptly refund to the Optionees and the Participants the exercise or
purchase price paid for any excess shares issued under the Plan and held in
escrow, together with interest (at the applicable Short Term Federal Rate) for
the period the shares were held in escrow, and such shares shall thereupon be
automatically cancelled and cease to be outstanding.

                  C. On March 25, 1999, the Board amended the Plan to increase
the maximum number of shares of Common Stock authorized for issuance over the
term of the Plan from 2,587,633 shares to 3,337,633 shares. This amendment is
subject to stockholder approval at the 1999 Annual Meeting. Until such
stockholder approval is obtained, any options granted on the basis of the
amendment shall not become exercisable in whole or in part, and those options
shall terminate without ever becoming exercisable for the option shares. All
option grants and direct stock issuances made prior to the amendment shall
remain outstanding in accordance with the terms and conditions of the respective
instruments evidencing those options or issuances, and nothing in this amendment
shall be deemed to modify or in any way affect those outstanding options or
issuances.

     V.   USE OF PROCEEDS

          Any cash proceeds received by the Corporation from the sale of shares
of Common Stock under the Plan shall be used for general corporate purposes.

     VI.  REGULATORY APPROVALS

          A. The implementation of the Plan, the granting of any stock option
under the Plan and the issuance of any shares of Common Stock (i) upon the
exercise of any granted option or (ii) under the Stock Issuance Program shall be
subject to the Corporation's procurement of all approvals and permits required
by regulatory authorities having jurisdiction over the Plan, the stock options
granted under it and the shares of Common Stock issued pursuant to it.

          B. No shares of Common Stock or other assets shall be issued or
delivered under the Plan unless and until there shall have been compliance with
all applicable requirements of Federal and state securities laws, including the
filing and effectiveness of the Form S-8 registration statement for the shares
of Common Stock issuable under the Plan, and all applicable listing requirements
of any stock exchange (or the Nasdaq National Market, if applicable) on which
Common Stock is then listed for trading.

     VII. NO EMPLOYMENT/SERVICE RIGHTS

          Nothing in the Plan shall confer upon the Optionee or the Participant
any right to continue in Service for any period of specific duration or
interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining such person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's Service at any time for any reason, with or without
cause.

<PAGE>   58
                                    APPENDIX

          The following definitions shall be in effect under the Plan:

     A. AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option grant
program in effect under the Plan.

     B. BOARD shall mean the Corporation's Board of Directors.

     C. CHANGE IN CONTROL shall mean a change in ownership or control of the
Corporation effected through either of the following transactions:

               (i) the acquisition, directly or indirectly by any person or
     related group of persons (other than the Corporation or a person that
     directly or indirectly controls, is controlled by, or is under common
     control with, the Corporation), of beneficial ownership (within the meaning
     of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
     percent (50%) of the total combined voting power of the Corporation's
     outstanding securities pursuant to a tender or exchange offer made directly
     to the Corporation's stockholders which the Board does not recommend such
     stockholders to accept, or

               (ii) a change in the composition of the Board over a period of
     thirty-six (36) consecutive months or less such that a majority of the
     Board members ceases, by reason of one or more contested elections for
     Board membership, to be comprised of individuals who either (A) have been
     Board members continuously since the beginning of such period or (B) have
     been elected or nominated for election as Board members during such period
     by at least a majority of the Board members described in clause (A) who
     were still in office at the time the Board approved such election or
     nomination.

     D. CODE shall mean the Internal Revenue Code of 1986, as amended.

     E. COMMON STOCK shall mean the Corporation's common stock.

     F. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

               (i) a merger or consolidation in which securities possessing more
     than fifty percent (50%) of the total combined voting power of the
     Corporation's outstanding securities are transferred to a person or persons

<PAGE>   59
     different from the persons holding those securities immediately prior to
     such transaction, or

               (ii) the sale, transfer or other disposition of all or
     substantially all of the Corporation's assets in complete liquidation or
     dissolution of the Corporation.

     G. CORPORATION shall mean Corsair Communications, Inc., a Delaware
corporation, and its successors.

     H. DISCRETIONARY OPTION GRANT PROGRAM shall mean the discretionary option
grant program in effect under the Plan.

     I. ELIGIBLE DIRECTOR shall mean a non-employee Board member eligible to
participate in the Automatic Option Grant Program in accordance with the
eligibility provisions of Article One.

     J. EMPLOYEE shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

     K. EXERCISE DATE shall mean the date on which the Corporation shall have
received written notice of the option exercise.

     L. FAIR MARKET VALUE per share of Common Stock on any relevant date shall
be determined in accordance with the following provisions:

               (i) If the Common Stock is at the time traded on the Nasdaq
     National Market, then the Fair Market Value shall be deemed equal to the
     closing selling price per share of Common Stock on the date in question, as
     such price is reported on the Nasdaq National Market or any successor
     system. If there is no closing selling price for the Common Stock on the
     date in question, then the Fair Market Value shall be the closing selling
     price on the last preceding date for which such quotation exists.

               (ii) If the Common Stock is at the time listed on any Stock
     Exchange, then the Fair Market Value shall be deemed equal to the closing
     selling price per share of Common Stock on the date in question on the
     Stock Exchange determined by the Plan Administrator to be the primary
     market for the Common Stock, as such price is officially quoted in the
     composite tape of transactions on such exchange. If there is no closing
     selling price for the Common Stock on the date in question, then the Fair
     Market Value shall be the closing selling price on the last preceding date
     for which such quotation exists.

<PAGE>   60

               (iii) For purposes of any option grants made on the Underwriting
     Date, the Fair Market Value shall be deemed to be equal to the price per
     share at which the Common Stock is to be sold in the initial public
     offering pursuant to the Underwriting Agreement.

               (iv) For purposes of any option grants made prior to the
     Underwriting Date, the Fair Market Value shall be determined by the Plan
     Administrator, after taking into account such factors as it deems
     appropriate.

     M. HOSTILE TAKE-OVER shall mean the acquisition, directly or indirectly,
by any person or related group of persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) of beneficial ownership (within the
meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities pursuant to a tender or exchange offer made directly to
the Corporation's stockholders which the Board does not recommend such
stockholders to accept.

     N. INCENTIVE OPTION shall mean an option which satisfies the requirements
of Code Section 422.

     O. INVOLUNTARY TERMINATION shall mean the termination of the Service of any
individual which occurs by reason of:

               (i) such individual's involuntary dismissal or discharge by the
     Corporation for reasons other than Misconduct, or

               (ii) such individual's voluntary resignation following (A) a
     change in his or her position with the Corporation which materially reduces
     his or her level of responsibility, (B) a reduction in his or her level of
     compensation (including base salary, fringe benefits and participation in
     any corporate-performance based bonus or incentive programs) by more than
     fifteen percent (15%) or (C) a relocation of such individual's place of
     employment by more than fifty (50) miles, provided and only if such change,
     reduction or relocation is effected by the Corporation without the
     individual's consent.

     P. MISCONDUCT shall mean the commission of any act of fraud, embezzlement
or dishonesty by the Optionee or Participant, any unauthorized use or disclosure
by such person of confidential information or trade secrets of the Corporation
(or any Parent or Subsidiary), or any other intentional misconduct by such
person adversely affecting the business or affairs of the Corporation (or any
Parent or Subsidiary) in a material manner. The foregoing definition shall not
be deemed to be inclusive of all the acts or omissions which the Corporation (or
any Parent or Subsidiary) may consider as grounds for the dismissal or discharge
of any Optionee, Participant or other person in the Service of the

<PAGE>   61
Corporation (or any Parent or Subsidiary).

     Q. 1934 ACT shall mean the Securities Exchange Act of 1934, as amended.

     R. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
 requirements of Code Section 422.

     S. OPTIONEE shall mean any person to whom an option is granted under the
Discretionary Option Grant, Salary Investment Option Grant or the Automatic
Option Grant Program.

     T. PARENT shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

     U. PARTICIPANT shall mean any person who is issued shares of Common Stock
under the Stock Issuance Program.

     V. PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the inability of
the Optionee or the Participant to engage in any substantial gainful activity by
reason of any medically determinable physical or mental impairment expected to
result in death or to be of continuous duration of twelve (12) months or more.
However, solely for purposes of the Automatic Option Grant Program, Permanent
Disability or Permanently Disabled shall mean the inability of the non-employee
Board member to perform his or her usual duties as a Board member by reason of
any medically determinable physical or mental impairment expected to result in
death or to be of continuous duration of twelve (12) months or more.

     W. PLAN shall mean the Corporation's 1997 Stock Incentive Plan, as set
forth in this document.

     X. PLAN ADMINISTRATOR shall mean the particular entity, whether the Primary
Committee, the Board or the Secondary Committee, which is authorized to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to one or more classes of eligible persons, to the extent such entity is
carrying out its administrative functions under those programs with respect to
the persons under its jurisdiction.

     Y. PLAN EFFECTIVE DATE shall mean the date on which the Plan was adopted by
the Board.

     Z. PREDECESSOR PLANS shall mean the Corporation's 1995 and 1996 Stock
Option/Stock Issuance Plans and 1997 Officer Stock Option Plan in effect
immediately prior to the Plan Effective Date hereunder.

<PAGE>   62
     AA. PRIMARY COMMITTEE shall mean the committee of two (2) or more non-
employee Board members appointed by the Board to administer the Discretionary
Option Grant and Stock Issuance Programs with respect to Section 16 Insiders and
to administer the Salary Investment Option Grant Program with respect to all
eligible individuals.

     AB. SALARY INVESTMENT OPTION GRANT PROGRAM shall mean the salary investment
option grant program in effect under the Plan.

     AC. SECONDARY COMMITTEE shall mean a committee of two (2) or more Board
members appointed by the Board to administer the Discretionary Option Grant and
Stock Issuance Programs with respect to eligible persons other than Section 16
Insiders.

     AD. SECTION 12 REGISTRATION DATE shall mean the date on which the Common
Stock is first registered under Section 12(g) or Section 15 of the 1934 Act.

     AE. SECTION 16 INSIDER shall mean an officer or director of the Corporation
subject to the short-swing profit liabilities of Section 16 of the 1934 Act.

     AF. SERVICE shall mean the performance of services for the Corporation (or
any Parent or Subsidiary) by a person in the capacity of an Employee, a non-
employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant or stock issuance.

     AG. STOCK EXCHANGE shall mean either the American Stock Exchange or the New
York Stock Exchange.

     AH. STOCK ISSUANCE AGREEMENT shall mean the agreement entered into by the
Corporation and the Participant at the time of issuance of shares of Common
Stock under the Stock Issuance Program.

     AI. STOCK ISSUANCE PROGRAM shall mean the stock issuance program in effect
under the Plan.

     AJ. SUBSIDIARY shall mean any corporation (other than the Corporation) in
an unbroken chain of corporations beginning with the Corporation, provided each
corporation (other than the last corporation) in the unbroken chain owns, at the
time of the determination, stock possessing fifty percent (50%) or more of the
total combined voting power of all classes of stock in one of the other
corporations in such chain.

     AK. TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value per
share of Common Stock on the date the option is surrendered to the Corporation
in connection with a Hostile Take-Over or (ii) the highest reported price per
share of Common Stock paid by the tender offeror in effecting such Hostile
Take-Over. However, if the surrendered option is an Incentive Option, the
Take-Over Price shall not

<PAGE>   63
exceed the clause (i) price per share.

     AL. TAXES shall mean the Federal, state and local income and employment tax
liabilities incurred by the holder of Non-Statutory Options or unvested shares
of Common Stock in connection with the exercise of those options or the vesting
of those shares.

     AM. 10% STOCKHOLDER shall mean the owner of stock (as determined under Code
Section 424(d)) possessing more than ten percent (10%) of the total combined
voting power of all classes of stock of the Corporation (or any Parent or
Subsidiary).

     AN. UNDERWRITING AGREEMENT shall mean the agreement between the Corporation
and the underwriter or underwriters managing the initial public offering of the
Common Stock.

     AO. UNDERWRITING DATE shall mean the date on which the Underwriting
Agreement is executed and priced in connection with an initial public offering
of the Common Stock.
<PAGE>   64
                                                                      Appendix B


                          CORSAIR COMMUNICATIONS, INC.

                        1997 EMPLOYEE STOCK PURCHASE PLAN

     I.   PURPOSE OF THE PLAN

          This Employee Stock Purchase Plan is intended to promote the interests
of Corsair Communications, Inc., a Delaware corporation, by providing eligible
employees with the opportunity to acquire a proprietary interest in the
Corporation through participation in a payroll-deduction based employee stock
purchase plan designed to qualify under Section 423 of the Code.

          Capitalized terms herein shall have the meanings assigned to such
terms in the attached Appendix.

    II.   ADMINISTRATION OF THE PLAN

          The Plan Administrator shall have full authority to interpret and
construe any provision of the Plan and to adopt such rules and regulations for
administering the Plan as it may deem necessary in order to comply with the
requirements of Code Section 423. Decisions of the Plan Administrator shall be
final and binding on all parties having an interest in the Plan.

   III.   STOCK SUBJECT TO PLAN

          A. The stock purchasable under the Plan shall be shares of authorized
but unissued or reacquired Common Stock, including shares of Common Stock
purchased on the open market. The maximum number of shares of Common Stock which
may be issued in the aggregate over the term of the Plan shall not exceed Six
Hundred Sixty Six Thousand Six Hundred Sixty Seven (666,667) shares.

          B. Should any change be made to the Common Stock by reason of any
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Common Stock as a class
without the Corporation's receipt of consideration, appropriate adjustments
shall be made to (i) the maximum number and class of securities issuable in the
aggregate under the Plan, (ii) the maximum number and class of securities
purchasable per Participant on any one Purchase Date and (iii) the number and
class of securities and the price per share in effect under each outstanding
purchase right in order to prevent the dilution or enlargement of benefits
thereunder.

   IV.    OFFERING PERIODS

          A. Shares of Common Stock shall be offered for purchase under the Plan

<PAGE>   65
through a series of successive offering periods until such time as (i) the
maximum number of shares of Common Stock available for issuance under the Plan
shall have been purchased or (ii) the Plan shall have been sooner terminated.

          B. Each offering period shall be of such duration (not to exceed
twenty-four (24) months) as determined by the Plan Administrator prior to the
start date. However, the initial offering period shall commence on the Effective
Date and terminate on the last business day in July 1999. The next offering
period shall commence on the first business day in August 1999, and subsequent
offering periods shall commence on dates designated by the Plan Administrator.

          C. Each offering period shall be comprised of a series of one or more
successive Purchase Intervals. Purchase Intervals shall run from the first
business day in February each year to the last business day in July of the same
year and from the first business day in August each year to the last business
day in January of the following year. However, the initial Purchase Interval in
effect under the initial offering period shall commence on the Effective Date
and terminate on the last business day in January 1998.

          D. Should the Fair Market Value per share of Common Stock on any
Purchase Date within an offering period be less than the Fair Market Value per
share of Common Stock on the start date of that offering period, then that
offering period shall automatically terminate with the purchase of shares of
Common Stock on such Purchase Date, and a new offering period shall commence on
the next business day. The new offering period shall have a duration of
twenty-four (24) months, unless a shorter duration is established by the Plan
Administrator within five (5) business days following the start date of that
offering period.

    V.    ELIGIBILITY

          A. Each individual who is an Eligible Employee on the start date of
any offering period under the Plan may enter that offering period on such start
date or on any subsequent Semi-Annual Entry Date within that offering period,
provided he or she remains an Eligible Employee.

          B. Each individual who first becomes an Eligible Employee after the
start date of an offering period may enter that offering period on any
subsequent Semi-Annual Entry Date within that offering period on which he or she
is an Eligible Employee.

          C. The date an individual enters an offering period shall be
designated his or her Entry Date for purposes of that offering period.

          D. To participate in the Plan for a particular offering period, the
Eligible Employee must complete the enrollment forms prescribed by the Plan
Administrator (including a stock purchase agreement and a payroll deduction
authorization) and file such forms with the Plan Administrator (or its
designate) on or before his or her scheduled Entry Date.

<PAGE>   66
    VI.   PAYROLL DEDUCTIONS

          A. Prior to the start date of each offering period, the Plan
Administrator shall determine the percentage of Base Salary which may be applied
by each Participant to the acquisition of shares of Common Stock under the
Purchase Plan during such offering period. Such percentage may be any multiple
of one percent (1%) of the Base Salary paid to the Participant during each
Purchase Interval within that offering period, up to a maximum of ten percent
(10%). In no event shall the Plan Administrator change the rate of payroll
deduction established for an offering period.

          B. The deduction rate nominated by the Participant shall continue in
effect throughout the offering period, except to the extent such rate is changed
in accordance with the following guidelines:

               (i) The Participant may, at any time during the offering period,
reduce his or her rate of payroll deduction to become effective as soon as
possible after filing the appropriate form with the Plan Administrator. The
Participant may not, however, effect more than one (1) such reduction per
Purchase Interval.

               (ii) The Participant may, prior to the commencement of any new
Purchase Interval within the offering period, increase the rate of his or her
payroll deduction by filing the appropriate form with the Plan Administrator.
The new rate (which may not exceed the maximum percentage established by the
Plan Administrator for that offering period) shall become effective on the start
date of the first Purchase Interval following the filing of such form.

          C. Payroll deductions shall begin on the first pay day following the
Participant's Entry Date into the offering period and shall (unless sooner
terminated by the Participant) continue through the pay day ending with or
immediately prior to the last day of that offering period. The amounts so
collected shall be credited to the Participant's book account under the Plan,
but no interest shall be paid on the balance from time to time outstanding in
such account. The amounts collected from the Participant shall not be held in
any segregated account or trust fund and may be commingled with the general
assets of the Corporation and used for general corporate purposes.

          D. Payroll deductions shall automatically cease upon the termination
of the Participant's purchase right in accordance with the provisions of the
Plan.

          E. The Participant's acquisition of Common Stock under the Plan on any
Purchase Date shall neither limit nor require the Participant's acquisition of
Common Stock on any subsequent Purchase Date, whether within the same or a
different offering period.

<PAGE>   67

   VII.   PURCHASE RIGHTS

          A. GRANT OF PURCHASE RIGHT. A Participant shall be granted a separate
purchase right for each offering period in which he or she participates. The
purchase right shall be granted on the Participant's Entry Date into the
offering period and shall provide the Participant with the right to purchase
shares of Common Stock, in a series of successive installments over the
remainder of such offering period, upon the terms set forth below. The
Participant shall execute a stock purchase agreement embodying such terms and
such other provisions (not inconsistent with the Plan) as the Plan Administrator
may deem advisable.

          Under no circumstances shall purchase rights be granted under the Plan
to any Eligible Employee if such individual would, immediately after the grant,
own (within the meaning of Code Section 424(d)) or hold outstanding options or
other rights to purchase, stock possessing five percent (5%) or more of the
total combined voting power or value of all classes of stock of the Corporation
or any Corporate Affiliate.

          B. EXERCISE OF THE PURCHASE RIGHT. Each purchase right shall be
automatically exercised in installments on each successive Purchase Date within
the offering period, and shares of Common Stock shall accordingly be purchased
on behalf of each Participant (other than Participants whose payroll deductions
have previously been refunded pursuant to the Termination of Purchase Right
provisions below) on each such Purchase Date. The purchase shall be effected by
applying the Participant's payroll deductions for the Purchase Interval ending
on such Purchase Date to the purchase of whole shares of Common Stock at the
purchase price in effect for the Participant for that Purchase Date.

          C. PURCHASE PRICE. The purchase price per share at which Common Stock
will be purchased on the Participant's behalf on each Purchase Date within the
offering period shall not be less than eighty-five percent (85%) of the lower of
(i) the Fair Market Value per share of Common Stock on the Participant's Entry
Date into that offering period or (ii) the Fair Market Value per share of Common
Stock on that Purchase Date.

          D. NUMBER OF PURCHASABLE SHARES. The number of shares of Common Stock
purchasable by a Participant on each Purchase Date during the offering period
shall be the number of whole shares obtained by dividing the amount collected
from the Participant through payroll deductions during the Purchase Interval
ending with that Purchase Date by the purchase price in effect for the
Participant for that Purchase Date. However, the maximum number of shares of
Common Stock purchasable per Participant on any one Purchase Date shall not
exceed One Thousand Five Hundred (1,500) shares, subject to periodic adjustments
in the event of certain changes in the Corporation's capitalization.

          E. EXCESS PAYROLL DEDUCTIONS. Any payroll deductions not applied to
the purchase of shares of Common Stock on any Purchase Date because they are not
sufficient to purchase a whole share of Common Stock shall be held for the
purchase of

<PAGE>   68
Common Stock on the next Purchase Date. However, any payroll deductions not
applied to the purchase of Common Stock by reason of the limitation on the
maximum number of shares purchasable by the Participant on the Purchase Date
shall be promptly refunded.

          F. TERMINATION OF PURCHASE RIGHT. The following provisions shall
govern the termination of outstanding purchase rights:

               (i) A Participant may, at any time prior to the next scheduled
        Purchase Date in the offering period, terminate his or her outstanding
        purchase right by filing the appropriate form with the Plan
        Administrator (or its designate), and no further payroll deductions
        shall be collected from the Participant with respect to the terminated
        purchase right. Any payroll deductions collected during the Purchase
        Interval in which such termination occurs shall, at the Participant's
        election, be immediately refunded or held for the purchase of shares on
        the next Purchase Date. If no such election is made at the time such
        purchase right is terminated, then the payroll deductions collected with
        respect to the terminated right shall be refunded as soon as possible.

               (ii) The termination of such purchase right shall be irrevocable,
        and the Participant may not subsequently rejoin the offering period for
        which the terminated purchase right was granted. In order to resume
        participation in any subsequent offering period, such individual must
        re-enroll in the Plan (by making a timely filing of the prescribed
        enrollment forms) on or before his or her scheduled Entry Date into that
        offering period.

               (iii) Should the Participant cease to remain an Eligible Employee
        for any reason (including death, disability or change in status) while
        his or her purchase right remains outstanding, then that purchase right
        shall immediately terminate, and all of the Participant's payroll
        deductions for the Purchase Interval in which the purchase right so
        terminates shall be immediately refunded. However, should the
        Participant cease to remain in active service by reason of an approved
        unpaid leave of absence, then the Participant shall have the right,
        exercisable up until the last business day of the Purchase Interval in
        which such leave commences, to (a) withdraw all the payroll deductions
        collected to date on his or her behalf for that Purchase Interval or (b)
        have such funds held for the purchase of shares on his or her behalf on
        the next scheduled Purchase Date. In no event, however, shall any
        further payroll deductions be collected on the Participant's behalf
        during such leave. Upon the Participant's return to active service, his
        or her payroll deductions under the Plan shall automatically resume at
        the rate in effect at the time the leave began, unless the Participant
        withdraws from the Plan prior to his or her return.

<PAGE>   69

          G. CORPORATE TRANSACTION. Each outstanding purchase right shall
automatically be exercised, immediately prior to the effective date of any
Corporate Transaction, by applying the payroll deductions of each Participant
for the Purchase Interval in which such Corporate Transaction occurs to the
purchase of whole shares of Common Stock at a purchase price per share not less
than eighty-five percent (85%) of the lower of (i) the Fair Market Value per
share of Common Stock on the Participant's Entry Date into the offering period
in which such Corporate Transaction occurs or (ii) the Fair Market Value per
share of Common Stock immediately prior to the effective date of such Corporate
Transaction. However, the applicable limitation on the number of shares of
Common Stock purchasable per Participant shall continue to apply to any such
purchase.

          The Corporation shall use its best efforts to provide at least ten
(10) days prior written notice of the occurrence of any Corporate Transaction,
and Participants shall, following the receipt of such notice, have the right to
terminate their outstanding purchase rights prior to the effective date of the
Corporate Transaction.

          H. PRORATION OF PURCHASE RIGHTS. Should the total number of shares of
Common Stock to be purchased pursuant to outstanding purchase rights on any
particular date exceed the aggregate number of shares then available for
issuance under the Plan, the Plan Administrator shall make a pro-rata allocation
of the available shares on a uniform and nondiscriminatory basis, and the
payroll deductions of each Participant, to the extent in excess of the aggregate
purchase price payable for the Common Stock pro-rated to such individual, shall
be refunded.

          I. ASSIGNABILITY. The purchase right shall be exercisable only by the
Participant and shall not be assignable or transferable by the Participant.

          J. SHAREHOLDER RIGHTS. A Participant shall have no shareholder rights
with respect to the shares subject to his or her outstanding purchase right
until the shares are purchased on the Participant's behalf in accordance with
the provisions of the Plan and the Participant has become a holder of record of
the purchased shares.

  VIII.   ACCRUAL LIMITATIONS

          A. No Participant shall be entitled to accrue rights to acquire Common
Stock pursuant to any purchase right outstanding under this Plan if and to the
extent such accrual, when aggregated with (i) rights to purchase Common Stock
accrued under any other purchase right granted under this Plan and (ii) similar
rights accrued under other employee stock purchase plans (within the meaning of
Code Section 423) of the Corporation or any Corporate Affiliate, would otherwise
permit such Participant to purchase more than Twenty-Five Thousand Dollars
($25,000) worth of stock of the Corporation or any Corporate Affiliate
(determined on the basis of the Fair Market Value per share on the date or dates
such rights are granted) for each calendar year such rights are at any time
outstanding.
<PAGE>   70

          B. For purposes of applying such accrual limitations to the purchase
rights granted under the Plan, the following provisions shall be in effect:

               (i) The right to acquire Common Stock under each outstanding
        purchase right shall accrue in a series of installments on each
        successive Purchase Date during the offering period on which such right
        remains outstanding.

               (ii) No right to acquire Common Stock under any outstanding
        purchase right shall accrue to the extent the Participant has already
        accrued in the same calendar year the right to acquire Common Stock
        under one (1) or more other purchase rights at a rate equal to
        Twenty-Five Thousand Dollars ($25,000) worth of Common Stock (determined
        on the basis of the Fair Market Value per share on the date or dates of
        grant) for each calendar year such rights were at any time outstanding.

          C. If by reason of such accrual limitations, any purchase right of a
Participant does not accrue for a particular Purchase Interval, then the payroll
deductions which the Participant made during that Purchase Interval with respect
to such purchase right shall be promptly refunded.

          D. In the event there is any conflict between the provisions of this
Article and one or more provisions of the Plan or any instrument issued
thereunder, the provisions of this Article shall be controlling.

   IX.    EFFECTIVE DATE AND TERM OF THE PLAN

          A. The Plan shall become effective on the Effective Date, provided no
purchase rights granted under the Plan shall be exercised, and no shares of
Common Stock shall be issued hereunder, until (i) the Plan shall have been
approved by the shareholders of the Corporation and (ii) the Corporation shall
have complied with all applicable requirements of the 1933 Act (including the
registration of the shares of Common Stock issuable under the Plan on a Form S-8
registration statement filed with the Securities and Exchange Commission), all
applicable listing requirements of any stock exchange (or the Nasdaq National
Market, if applicable) on which the Common Stock is listed for trading and all
other applicable requirements established by law or regulation. In the event
such shareholder approval is not obtained, or such compliance is not effected,
within twelve (12) months after the date on which the Plan is adopted by the
Board, the Plan shall terminate and have no further force or effect, and all
sums collected from Participants during the initial offering period hereunder
shall be refunded.

          B. Unless sooner terminated by the Board, the Plan shall terminate
upon the earliest of (i) the last business day in July 2007, (ii) the date on
which all shares available for issuance under the Plan shall have been sold
pursuant to purchase rights exercised under the Plan or (iii) the date on which
all purchase rights are exercised in connection

<PAGE>   71
with a Corporate Transaction. No further purchase rights shall be granted or
exercised, and no further payroll deductions shall be collected, under the Plan
following such termination.

   X.     AMENDMENT OF THE PLAN

          The Board may alter, amend, suspend or discontinue the Plan at any
time to become effective immediately following the close of any Purchase
Interval. However, the Board may not, without the approval of the Corporation's
shareholders, (i) materially increase the number of shares of Common Stock
issuable under the Plan or the maximum number of shares purchasable per
Participant on any one Purchase Date, except for permissible adjustments in the
event of certain changes in the Corporation's capitalization, (ii) alter the
purchase price formula so as to reduce the purchase price payable for the shares
of Common Stock purchasable under the Plan or (iii) materially increase the
benefits accruing to Participants under the Plan or materially modify the
requirements for eligibility to participate in the Plan.

   XI.    GENERAL PROVISIONS

          A. All costs and expenses incurred in the administration of the Plan
shall be paid by the Corporation; however, each Plan Participant shall bear all
costs and expenses incurred by such individual in the sale or other disposition
of any shares purchased under the Plan.

          B. Nothing in the Plan shall confer upon the Participant any right to
continue in the employ of the Corporation or any Corporate Affiliate for any
period of specific duration or interfere with or otherwise restrict in any way
the rights of the Corporation (or any Corporate Affiliate employing such person)
or of the Participant, which rights are hereby expressly reserved by each, to
terminate such person's employment at any time for any reason, with or without
cause.

          C. The provisions of the Plan shall be governed by the laws of the
State of Delaware without resort to that State's conflict-of-laws rules.
<PAGE>   72
                                   SCHEDULE A

                          CORPORATIONS PARTICIPATING IN
                          EMPLOYEE STOCK PURCHASE PLAN

                          Corsair Communications, Inc.
                           Subscriber Computing, Inc.

<PAGE>   73
                                    APPENDIX

          The following definitions shall be in effect under the Plan:

          A. BASE SALARY shall mean the (i) regular base salary paid to a
Participant by one or more Participating Companies during such individual's
period of participation in one or more offering periods under the Plan,
determined prior to any deductions for any pre-tax contributions made by the
Participant to any Code Section 401(k) salary deferral plan or any Code Section
125 cafeteria benefit program now or hereafter established by the Corporation or
any Corporate Affiliate. The following items of compensation shall not be
included in Base Salary: (i) all overtime payments, bonuses, commissions (other
than those functioning as base salary equivalents), profit-sharing distributions
and other incentive-type payments and (ii) any and all contributions (other than
Code Section 401(k) or Code Section 125 contributions) made on the Participant's
behalf by the Corporation or any Corporate Affiliate under any employee benefit
or welfare plan now or hereafter established.

          B. BOARD shall mean the Corporation's Board of Directors.

          C. CODE shall mean the Internal Revenue Code of 1986, as amended.

          D. COMMON STOCK shall mean the Corporation's common stock.

          E. CORPORATE AFFILIATE shall mean any "parent" or "subsidiary"
corporation of the Corporation, whether now existing or subsequently
established. "Parent" and "subsidiary" shall be determined as follows:

          (i) "parent" shall mean any corporation (other than the Corporation)
        in an unbroken chain of corporations ending with the Corporation,
        provided each corporation in the unbroken chain (other than the
        Corporation) owns, at the time of the determination, stock possessing
        fifty percent (50%) or more of the total combined voting power of all
        classes of stock in one of the other corporations in such chain, and

          (ii) "subsidiary" shall mean any corporation (other than the
        Corporation) in an unbroken chain of corporations beginning with the
        Corporation, provided each corporation (other than the last corporation)
        in the unbroken chain owns, at the time of the determination, stock
        possessing fifty percent (50%) or more of the total combined voting
        power of all classes of stock in one of the other corporations in such
        chain.

<PAGE>   74

          F. CORPORATE TRANSACTION shall mean either of the following
shareholder-approved transactions to which the Corporation is a party:

            (i) a merger or consolidation in which securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction, or

            (ii) the sale, transfer or other disposition of all or substantially
        all of the assets of the Corporation in complete liquidation or
        dissolution of the Corporation.

          G. CORPORATION shall mean Corsair Communications, Inc., a Delaware
corporation, and any corporate successor to all or substantially all of the
assets or voting stock of Corsair Communications, Inc. which shall by
appropriate action adopt the Plan.

          H. EFFECTIVE DATE shall mean the date on which the Underwriting
Agreement is executed and finally priced. Any Corporate Affiliate which becomes
a Participating Corporation after such Effective Date shall designate a
subsequent Effective Date with respect to its employee-Participants.

          I. ELIGIBLE EMPLOYEE shall mean any person who is employed by a
Participating Corporation on a basis under which he or she is regularly expected
to render more than twenty (20) hours of service per week for more than five (5)
months per calendar year for earnings considered wages under Code Section
3401(a).

          J. ENTRY DATE shall mean the date an Eligible Employee first commences
participation in the offering period in effect under the Plan. The earliest
Entry Date under the Plan shall be the Effective Date.

          K. FAIR MARKET VALUE per share of Common Stock on any relevant date
shall be determined in accordance with the following provisions:

            (i) If the Common Stock is at the time traded on the Nasdaq National
        Market, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question, as such price is
        reported by the National Association of Securities Dealers on the Nasdaq
        National Market or any successor system. If there is no closing selling
        price for the Common Stock on the date in question, then the Fair Market
        Value shall be the closing selling price on the last preceding date for
        which such quotation exists.

            (ii) If the Common Stock is at the time listed on any Stock
        Exchange, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question on the Stock Exchange

<PAGE>   75
        determined by the Plan Administrator to be the primary market for the
        Common Stock, as such price is officially quoted in the composite tape
        of transactions on such exchange. If there is no closing selling price
        for the Common Stock on the date in question, then the Fair Market Value
        shall be the closing selling price on the last preceding date for which
        such quotation exists.

            (iii) For purposes of the initial offering period which begins at
        the Effective Date, the Fair Market Value shall be deemed to be equal to
        the price per share at which the Common Stock is sold in the initial
        public offering pursuant to the Underwriting Agreement.

          L. 1933 ACT shall mean the Securities Act of 1933, as amended.

          M. PARTICIPANT shall mean any Eligible Employee of a Participating
Corporation who is actively participating in the Plan.

          N. PARTICIPATING CORPORATION shall mean the Corporation and such
Corporate Affiliate or Affiliates as may be authorized from time to time by the
Board to extend the benefits of the Plan to their Eligible Employees. The
Participating Corporations in the Plan as of the Effective Date are listed in
attached Schedule A.

          O. PLAN shall mean the Corporation's 1997 Employee Stock Purchase
Plan, as set forth in this document.

          P. PLAN ADMINISTRATOR shall mean the committee of two (2) or more
Board members appointed by the Board to administer the Plan.

          Q. PURCHASE DATE shall mean the last business day of each Purchase
Interval. The initial Purchase Date shall be January 30, 1998.

          R. PURCHASE INTERVAL shall mean each successive six (6)-month period
within the offering period at the end of which there shall be purchased shares
of Common Stock on behalf of each Participant. The initial Purchase Interval,
however, shall end on January 30, 1998.

          S. SEMI-ANNUAL ENTRY DATE shall mean the first business day in
February and August each year on which an Eligible Employee may first enter an
offering period.

          T. STOCK EXCHANGE shall mean either the American Stock Exchange or the
New York Stock Exchange.

          U. UNDERWRITING AGREEMENT shall mean the agreement between the
Corporation and the underwriter or underwriters managing the initial public
offering of the Common Stock.
<PAGE>   76
                             YOUR VOTE IS IMPORTANT

         In order to assure your representation at the meeting, you are
requested to complete, sign and date the enclosed proxy as promptly as possible
and return it in the enclosed envelope. No postage need be affixed if mailed in
the United States.
<PAGE>   77
                          CORSAIR COMMUNICATIONS, INC.
               PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

        The undersigned hereby appoints Mary Ann Byrnes and Martin J. Silver
jointly and severally, as proxies, with full power of substitution and
resubstitution, to vote all shares of stock which the undersigned is entitled to
vote at the Annual Meeting of Stockholders of Corsair Communications, Inc. to be
held on Wednesday, June 16, 1999, or at any postponements or adjournments
thereof, as specified below, and to vote in his discretion on such other
business as may properly come before the Meeting and any adjournments thereof.

         THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR PROPOSALS 1, 2, 3 and 4

1.      Election of Directors:

        Nominees:     Stephen M. Dow and Rachelle Chong will stand for
                      election to the Board for terms to expire in 2002.

        [ ] Vote FOR all nominees above (except as withheld in the space below)
        [ ] Vote WITHHELD from all nominees

        Instruction: To withhold authority to vote for any individual nominee,
check the box "Vote FOR" and write the nominee's name on the line below.

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

2.      Ratification of Accountants:

        Ratification and approval of the selection of KPMG LLP as independent
        auditors for the fiscal year ending December 31, 1998.

        [ ]  Vote FOR             [ ]  Vote AGAINST              [ ]   ABSTAIN

3.      Approval of amendments to 1997 Stock Incentive Plan:

        to increase the authorized number of shares of common stock available
        for issuance under such plan from 2,587,633 to 3,337,633 and to change
        the term of the options granted under the Automatic Option Grant Program
        from 10 years to 5 years with such options to be fully vested upon
        grant.

        [ ]  Vote FOR             [ ]  Vote AGAINST              [ ]   ABSTAIN

4.      Approval of amendment to Employee Stock Purchase Plan:

        Amendment of the 1997 Employee Stock Purchase Plan to increase the
        authorized number of shares of Common Stock available for issuance under
        such plan from 266,667 to 666,667.

        [ ]  Vote FOR             [ ]  Vote AGAINST              [ ]   ABSTAIN


                     (Please sign and date on reverse side)

<PAGE>   78

         UNLESS OTHERWISE SPECIFIED BY THE UNDERSIGNED, THIS PROXY WILL BE VOTED
FOR PROPOSALS 1, 2, 3 AND 4 AND WILL BE VOTED BY THE PROXYHOLDERS AT THEIR
DISCRETION AS TO ANY OTHER MATTERS PROPERLY TRANSACTED AT THE MEETING OR ANY
ADJOURNMENTS THEREOF. TO VOTE IN ACCORDANCE WITH THE BOARD OF DIRECTORS'
RECOMMENDATIONS JUST SIGN BELOW, NO BOXES NEED BE CHECKED.

                                             Dated:                   , 19
                                                   -------------------    --

                                             ----------------------------------
                                             Signature of Stockholder

                                             ----------------------------------
                                             Printed Name of Stockholder

                                             ----------------------------------
                                             Title (if appropriate) Please sign
                                             exactly as name appears hereon. If
                                             signing as attorney, executor,
                                             administrator, trustee or guardian,
                                             please give full title as such,
                                             and, if signing for a corporation,
                                             give your title. When shares are in
                                             the names of more than one person,
                                             each should sign.


            CHECK HERE IF YOU PLAN TO ATTEND THE ANNUAL MEETING. [ ]


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission