Document:

<PAGE>
                                                                   EXHIBIT 10.43

SILICON VALLEY BANK

                           AMENDMENT TO LOAN AGREEMENT

BORROWER:   PROXIM CORPORATION

DATE:       MARCH 18, 2003

      THIS AMENDMENT TO LOAN DOCUMENTS is entered into between Silicon Valley
Bank ("Silicon") and the borrower named above ("Borrower").

      The Parties agree to amend the Loan and Security Agreement between them,
dated December 27, 2002 (the "Loan Agreement"), as follows, effective as of the
date hereof. (Capitalized terms used but not defined in this Amendment, shall
have the meanings set forth in the Loan Agreement.)

      1.    EXTENSION OF MATURITY DATE. Section 4 of the Schedule to the Loan
Agreement, which presently reads "Revolving Maturity Date (Section 13.1): 364
days from the date hereof" is hereby amended in its entirety to read as follows:

      "Revolving Maturity Date (Section 13.1): April 1, 2004."

      2.    MINIMUM CASH BALANCE The portion of Section 5.1 of the Schedule to
the Loan Agreement which presently reads as follows:

            "Borrower shall at all times maintain unrestricted cash balances on
            deposit with Bank in an amount not less than the outstanding
            principal balance of the Advances plus the following amounts: (i)
            $6,500,000 from the date hereof to and including January 1, 2003,
            and (ii) $7,500,000 thereafter."

      is hereby amended to read as follows:

            "Borrower shall at all times maintain unrestricted cash balances on
            deposit with Bank in an amount not less than the outstanding
            principal balance of the Advances plus the following amounts: (i)
            $6,500,000 from the date hereof to and including January 1, 2003,
            and (ii) $7,500,000 from January 1, 2003 to and including December
            31, 2003, and (iii) $10,000,000 thereafter."

      3.    MAXIMUM QUARTERLY LOSS. Section 5.1(a) of the Schedule, which
            presently reads as follows:

            (a)   Maximum Quarterly Adjusted Net Loss. Borrower shall not incur
                  an Adjusted Net Loss (as defined below) of more than the
                  following amounts for the following fiscal quarters:

                                       -1-
<PAGE>

SILICON VALLEY BANK                                  AMENDMENT TO LOAN AGREEMENT

<TABLE>
<CAPTION>
                  Quarter Ended                              Maximum Adjusted Net Loss
                  -------------                              -------------------------
<S>                                                                <C>
                  December 31, 2002                                ($10,700,000)
                  March 31, 2003                                   ($ 6,800,000)
                  June 30, 2003                                    ($ 6,150,000)
                  September 30, 2003                               ($ 4,000,000)
</TABLE>

      is hereby amended by adding the following at the end of the above chart:

<TABLE>
<S>                                                                 <C>
                  December 31, 2003                                 ($1,000,000)
</TABLE>

      4.    CONTROL AGREEMENTS The portion of Section 7.1 of the Schedule which
      presently reads as follows:

            "As to any Deposit Accounts and investment accounts maintained with
            another institution (other than disbursement or payroll accounts
            which Borrower is permitted hereunder to maintain with institutions
            located outside the United States), Borrower shall cause such
            institution, within 45 days after the date of this Agreement, to
            enter into a control agreement in form acceptable to Bank in its
            good faith business judgment in order to perfect Bank's
            first-priority security interest in said Deposit Accounts and
            investment accounts."

      is hereby amended to read as follows:

            "As to any Deposit Accounts and investment accounts maintained with
            another institution (other than disbursement or payroll accounts
            which Borrower is permitted hereunder to maintain with institutions
            located outside the United States), Borrower shall cause such
            institution, within 45 days after the date of this Agreement, to
            enter into a control agreement in form acceptable to Bank in its
            good faith business judgment in order to perfect Bank's
            first-priority security interest in said Deposit Accounts and
            investment accounts, provided that Borrower may retain up to a total
            not to exceed $150,000 (net of outstanding checks or similar
            immediately pending debits) in Deposit Accounts at Comerica Bank
            without causing Comerica Bank to enter into a control agreement with
            respect thereto. Without limiting the generality of the foregoing,
            Borrower shall make all of its payroll payments from Deposit
            Accounts maintained at Bank on and after March 20, 2003, and
            Borrower shall make all of its payable payments from Deposit
            Accounts maintained at Bank on and after March 30, 2003."

      5.    FEE. In consideration for Silicon entering into this Amendment,
Borrower shall concurrently pay Silicon a fee in the amount of $30,000, which
shall be non-refundable and in addition to all interest and other fees payable
to Silicon under the Loan Documents. Silicon is authorized to charge said fee to
Borrower's loan account.

                                       -2-
<PAGE>
SILICON VALLEY BANK                                  AMENDMENT TO LOAN AGREEMENT

      6.    REPRESENTATIONS TRUE. Borrower represents and warrants to Silicon
that all representations and warranties set forth in the Loan Agreement, as
amended hereby, are true and correct.

      7.    GENERAL PROVISIONS. This Amendment, the Loan Agreement, any prior
written amendments to the Loan Agreement signed by Silicon and Borrower, and the
other written documents and agreements between Silicon and Borrower set forth in
full all of the representations and agreements of the parties with respect to
the subject matter hereof and supersede all prior discussions, representations,
agreements and understandings between the parties with respect to the subject
hereof. Except as herein expressly amended, all of the terms and provisions of
the Loan Agreement, and all other documents and agreements between Silicon and
Borrower shall continue in full force and effect and the same are hereby
ratified and confirmed.

<TABLE>
<S>                                              <C>
   BORROWER:                                     SILICON:

   PROXIM CORPORATION                            SILICON VALLEY BANK

   BY    /s/ KEITH E. GLOVER                     BY   /s/ BRADFORD LEAHY
         -------------------------------            ----------------------------
         PRESIDENT OR VICE PRESIDENT             TITLE   VICE PRESIDENT
                                                      --------------------------
   BY    /S/ KEITH E. GLOVER
         -------------------------------
         SECRETARY OR ASS'T SECRETARY
</TABLE>

-1

                                       -3-
<PAGE>
SILICON VALLEY BANK                                  AMENDMENT TO LOAN AGREEMENT

                                     CONSENT

      Each of the undersigned acknowledges that its consent to the foregoing
Agreement is not required, but the undersigned nevertheless does hereby consent
to the foregoing Agreement and to the documents and agreements referred to
therein and to all future modifications and amendments thereto, and any
termination thereof, and to any and all other present and future documents and
agreements between or among the foregoing parties. Nothing herein shall in any
way limit any of the terms or provisions of the Continuing Guaranty of the
undersigned, all of which are hereby ratified and affirmed.

<TABLE>
<S>                                              <C>
Proxim Wireless Networks, Inc.                   Wirelesshome Corporation

By    /s/ KEITH E. GLOVER                        By    /s/ KEITH E. GLOVER
      -----------------------                          -----------------------
Name  Keith E. Glover                            Name  Keith E. Glover
Title EVP & CFO                                  Title EVP & CFO

Western Multiplex International Holdings, Inc.

By    /s/ KEITH E. GLOVER
-----------------------------
Name  Keith E. Glover
Title EVP & CFO
</TABLE>

                                       -4-<PAGE>

                                                                    EXHIBIT 10.2

                       INTRABIOTICS PHARMACEUTICALS, INC.

                   AMENDED AND RESTATED 1995 STOCK OPTION PLAN

                            ADOPTED FEBRUARY 15, 1995
                            AMENDED ON JUNE 13, 1996
                            AMENDED ON JULY 29, 1997
                           AMENDED ON OCTOBER 21, 1997
                            AMENDED ON JUNE 18, 1998
                           AMENDED ON OCTOBER 22, 1998
                            AMENDED ON JUNE 10, 1999
                           AMENDED ON JANUARY 26, 2000
                            AMENDED ON APRIL 27, 2001
                            AMENDED ON AUGUST 1, 2002
                          AMENDED ON NOVEMBER 16, 2002

         1.       PURPOSE OF THE PLAN. The purposes of this Amended and Restated
1995 Stock Option Plan are to attract and retain the best available personnel
for positions' of substantial responsibility, to provide additional incentive to
the Employees and Consultants of the Company and to promote the success of the
Company's business.

         Options granted hereunder may be either Incentive Stock Options or
Nonstatutory Stock Options, at the discretion of the Board and as reflected in
the terms of the written option agreement.

         2.       DEFINITIONS. As used herein, the following definitions shall
apply:

                  (a)      "BOARD" shall mean the Board of Directors of the
Company.

                  (b)      "CODE" shall mean the Internal Revenue Code of 1986,
as amended.

                  (c)      "COMMITTEE" shall mean the Committee appointed by the
Board in accordance with paragraph (a) of Section 4 of the Plan, or, if no
Committee is appointed, then the Board.

                  (d)      "COMMON STOCK" shall mean the Common Stock, $0.001
par value per share, of the Company.

                  (e)      "COMPANY" shall mean IntraBiotics Pharmaceuticals,
Inc., a Delaware corporation.

                  (f)      "CONSULTANT" shall mean any person who is engaged by
the Company or any Parent or Subsidiary to render consulting services, including
serving on the Company's Scientific Advisory Board, and is compensated for such
consulting services, and any director of

                                       1.

<PAGE>

the Company whether compensated for such services or not; provided that if and
in the event the Company registers any class of any equity security pursuant to
Section 12 of the Exchange Act, the term Consultant shall thereafter not include
directors who are not compensated for their services or are paid only a
director's fee by the Company.

                  (g)      "CONTINUOUS STATUS AS AN EMPLOYEE OR CONSULTANT"
shall mean the absence of any interruption or termination of service as an
Employee or Consultant. Continuous Status as an Employee or Consultant shall not
be considered interrupted in the case of sick leave, military leave or any other
leave of absence approved by the Board; provided that such leave is for a period
of not more than 90 days or reemployment upon the expiration of such leave is
guaranteed by contract or statute.

                  (h)      "DISINTERESTED PERSON" shall mean a director (i) who
is not, during the one year prior to service as an administrator of the Plan
pursuant to Section 4(a), or during such service, granted or awarded equity
securities pursuant to the Plan or any other plan of the Company or any of its
affiliates except as permitted by Rule 16b-3(c)(2)(i)(A)-(D) under the Exchange
Act or (ii) who is otherwise considered to be a "disinterested person" in
accordance with Rule 16b-3(c)(2)(i), or any other applicable rules, regulations
or interpretation of the Securities Exchange Commission. Any such person shall
otherwise comply with the requirements of Rule 16b-3 under the Exchange Act.

                  (i)      "EMPLOYEE" shall mean any person, including officers
and directors, employed by the Company or any Parent or Subsidiary of the
Company. The payment of a director's fee by the Company shall not be sufficient
to constitute "employment" by the Company.

                  (j)      "EXCHANGE ACT" shall mean the Securities Exchange Act
of 1934, as amended.

                  (k)      "INCENTIVE STOCK OPTION" shall mean an Option
intended to qualify as an incentive stock option within the meaning of Section
422 of the Code.

                  (l)      "NONSTATUTORY STOCK OPTION" shall mean an Option not
intended to qualify as an Incentive Stock Option.

                  (m)      "OPTION" shall mean a stock option granted pursuant
to the Plan.

                  (n)      "OPTIONED STOCK" shall mean the Common Stock subject
to an Option.

                  (o)      "OPTIONEE" shall mean an Employee or Consultant who
receives an Option.

                  (p)      "PARENT" shall mean a "parent corporation" whether
now or hereafter existing, as defined in Section 425(e) of the Code.

                  (q)      "PLAN" shall mean this Amended and Restated 1995
Stock Option Plan.

                                       2.

<PAGE>

                  (r)      "SHARE" shall mean a share of the Common Stock, as
adjusted in accordance with Section 11 of the Plan.

                  (s)      "STOCK OPTION AGREEMENTS" shall mean Stock Option
Agreements and Amended and Restated Stock Option Agreements as defined in
Section 16 of the Plan.

                  (t)      "SUBSIDIARY" shall mean a "subsidiary corporation"
whether now or hereafter existing, as defined in Section 425(f) of the Code.

         3.       STOCK SUBJECT TO THE PLAN. Subject to the provisions of
Section 11 of the Plan, the maximum aggregate number of Shares which may be
optioned and sold under the Plan is nine million forty-seven thousand one
hundred eight (9,047,108) Shares. The Shares may be authorized, but unissued, or
reacquired Common Stock.

         If an Option should expire or become unexercisable for any reason
without having been exercised in full, the unpurchased Shares which were subject
thereto shall, unless the Plan shall have been terminated, become available for
future grant under the Plan. Notwithstanding any other provision of the Plan,
Shares issued under the Plan and later repurchased by the Company shall not
become available for future grant or sale under the Plan.

         4.       ADMINISTRATION OF THE PLAN.

                  (a)      PROCEDURE. The Plan shall be administered by the
Board.

                           (i)      The Board may appoint a Committee consisting
of not less than two members of the Board to administer the Plan on behalf of
the Board, subject to such terms and conditions as the Board may prescribe. Once
appointed, the Committee shall continue to serve until otherwise directed by the
Board. Members of the Board who are either eligible for Options or have been
granted Options may vote on any matters affecting the administration of the Plan
or the grant of any Options pursuant to the Plan, except that no such member
shall act upon the granting of an Option to himself, but any such member may be
counted in determining the existence of a quorum at any meeting of the Board
during which action is taken with respect to the granting of Options to him.

                           (ii)     Notwithstanding the foregoing subparagraph
(i), if and in any event the Company registers any class of any equity security
pursuant to Section 12 of the Exchange Act, any grants of Options to officers or
directors shall only be made by the Board, if each member of the Board is a
Disinterested Person; provided, however, if each member of the Board is not a
Disinterested Person, then grants of Options to officers or directors shall only
be made by a Committee of two or more directors, each of whom is a Disinterested
Person.

                           (iii)    Subject to the foregoing subparagraphs (i)
and (ii), from time to time the Board may increase the size of the Committee and
appoint additional members thereof, remove members (with or without cause) and
appoint new members in substitution therefor, fill vacancies however caused, or
remove all members of the Committee and thereafter directly administer the Plan.

                                       3.

<PAGE>

                  (b)      POWERS OF THE COMMITTEE. Subject to the provisions of
the Plan, the Committee shall have the authority, in its discretion: (i) to
grant Incentive Stock Options or Nonstatutory Stock Options; (ii) to determine,
upon review of relevant information and in accordance with Section 8(b) of the
Plan, the fair market value of the Common Stock; (iii) to determine the exercise
price per share of Options to be granted, which exercise price shall be
determined in accordance with Section 8(a) of the Plan; (iv) to determine the
Employees or Consultants to whom, and the time or times at which, Options shall
be granted and the number of shares to be represented by each Option; (v) to
interpret the Plan; (vi) to prescribe, amend and rescind rules and regulations
relating to the Plan; (vii) to determine the terms and provisions of each Option
granted (which need not be identical) and, with the consent of the holder
thereof, modify or amend each Option; (viii) to defer (with the consent of the
Optionee) the exercise date of any Option, consistent with the provisions of
Section 5 of the Plan; (ix) to authorize any person to execute on behalf of the
Company any instrument required to effectuate the grant of an Option previously
granted by the Board; and (x) to make all other determinations deemed necessary
or advisable for the administration of the Plan.

                  (c)      EFFECT OF COMMITTEE'S DECISION. All decisions,
determinations and interpretations of the Committee shall be final and binding
on all Optionees and any other holders of any Options granted under the Plan.

                  (d)      AUTHORITY TO REPRICE. The Board or the Committee, as
applicable, shall have the power, subject to and within the limitations of the
express provisions of the Plan, to effect, at any time and from time to time,
with the consent of any adversely affected Optionee, (1) the reduction of the
exercise price of any outstanding Option under the Plan, (2) the cancellation of
any outstanding Option under the Plan and the grant in substitution therefor of
(A) a new Option under the Plan covering the same or a different number of
shares of Common Stock, (B) a stock bonus, (C) the right to acquire restricted
stock, and/or (D) cash, or (3) any other action that is treated as a repricing
under generally accepted accounting principles.

         5.       ELIGIBILITY.

                  (a)      Nonstatutory Stock Options may be granted only to
Employees and Consultants. Incentive Stock Options may be granted only to
Employees. An Employee or Consultant who has been granted an Option may, if he
is otherwise eligible, be granted an additional Option or Options.

                  (b)      When any Options designated as Incentive Stock
Options become first available for purchase, and when the aggregate of all
Incentive Stock Options granted to an Employee by the Company or any Parent or
Subsidiary would result in Shares having an aggregate fair market value
(determined for each Share as of the date of grant of the Option covering such
Share) in excess of $100,000, then upon exercise of one or more Incentive Stock
Options during any calendar year, any Options in excess of such dollar amount
shall be treated for all purposes as Nonstatutory Stock Options.

                  (c)      Section 5(b) of the Plan shall apply only to an
Incentive Stock Option evidenced by an "Incentive Stock Option Agreement" which
sets forth the intention of the Company and the Optionee that such Option shall
qualify as an Incentive Stock Option. Section

                                       4.

<PAGE>

5(b) of the Plan shall not apply to any Option evidenced by a "Nonstatutory
Stock Option Agreement" which sets forth the intention of the Company and the
Optionee that such Option shall be a Nonstatutory Stock Option.

                  (d)      The Plan shall not confer upon any Optionee any right
with respect to continuation of employment or consulting relationship with the
Company, nor shall it interfere in any way with his right or the Company's right
to terminate his employment or consulting relationship at any time, with or
without cause.

         6.       TERM OF PLAN. The Plan shall become effective upon the earlier
to occur of its adoption by the Board or its approval by the stockholders of the
Company as described in Section 17 of the Plan. It shall continue in effect for
a term of ten (10) years unless sooner terminated under Section 13 of the Plan.
Termination of the Plan shall not affect the obligations of the Company or the
rights of Optionees pursuant to Options outstanding on the date of termination.

         7.       TERM OF OPTION. The term of each Incentive Stock Option shall
be ten (10) years from the date of grant thereof or such shorter term as may be
provided in the Incentive Stock Option Agreement. The term of each Nonstatutory
Stock Option shall be ten (10) years from the date of grant thereof or such
shorter term as may be provided in the Nonstatutory Stock Option Agreement.
However, in the case of an Incentive Stock Option granted to an Optionee who, at
the time the Option is granted, owns stock representing more than ten percent
(10%) of the voting power of all classes of stock of the Company or any Parent
or Subsidiary, the term of the Option shall be five (5) years from the date of
grant thereof or such shorter term as may be provided in the Incentive Stock
Option Agreement.

         8.       EXERCISE PRICE AND CONSIDERATION.

                  (a)      The per Share exercise price for the Shares to be
issued pursuant to exercise of an Option shall be such price as is determined by
the Committee, but' shall be subject to the following:

                           (i)      In the case of an Incentive Stock Option

                                    (A)      granted to an Employee or
Consultant who, at the time of the grant of such Incentive Stock Option, owns
stock representing more than ten percent (10%) of the voting power of all
classes of stock of the Company or any Parent or Subsidiary, the per Share
exercise price shall be no less than 110% of the fair market value per Share on
the date of grant.

                                    (B)      granted to an Employee or
Consultant, the per Share exercise price shall be no less than 100% of the fair
market value per Share on the date of grant.

                           (ii)     In the case of a Nonstatutory Stock Option

                                    (A)      granted to an Employee or
Consultant who, at the time of the grant of such Option, owns stock representing
more than ten percent (10%) of the voting

                                       5.

<PAGE>

power of all classes of stock of the Company or any Parent or Subsidiary, the
per Share exercise price shall be no less than 110% of the fair market value per
Share on the date of the grant.

                                    (B)      granted to an Employee or
Consultant, the per Share exercise price shall be no less than 85% of the fair
market value per Share on the date of grant.

                  (b)      The fair market value shall be determined by the
Committee in its discretion; provided, however, that where there is a public
market for the Common Stock, the fair market value per Share shall be the mean
of the bid and asked prices (or the closing price per share if the Common Stock
is listed on the National Association of Securities Dealers Automated Quotation
("NASDAQ") National Market System) of the Common Stock for the date of grant, as
reported in the Wall Street Journal (or, if not so reported, as otherwise
reported by the NASDAQ System) or, in the event the Common Stock is listed on a
stock exchange, the fair market value per Share shall be the closing price on
such exchange on the date of grant of the Option, as reported in the Wall Street
Journal.

                  (c)      The consideration to be paid for the Shares to be
issued upon exercise of an Option, including the method of payment, shall be
determined by the Committee and may consist entirely of cash, check or other
Shares of Common Stock which (i) either have been owned by the Optionee for more
than six (6) months on the date of surrender or were not acquired, directly or
indirectly, from the Company, and (ii) have a fair market value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised, or any combination of such methods of payment.

         9.       EXERCISE OF OPTION.

                  (a)      PROCEDURE FOR EXERCISE. Any Option granted hereunder
shall be exercisable at such times and under such conditions as determined by
the Board, including performance criteria with respect to the Company and/or the
Optionee, and as shall be permissible under the terms of the Plan.

                           (i)      STOCK OPTION AGREEMENT. Each grant of an
Option under the Plan shall be evidenced by a Stock Option Agreement.

                           (ii)     EXERCISABILITY. The Stock Option Agreement
shall specify the date when all or any installment of the Option is to become
exercisable. An Option shall become exercisable at the rate of at least twenty
percent (20%) per year over five (5) years from the date the Option is granted;
provided however, that an Option granted to an officer, director or consultant
(within the meaning of Section 260.140.41 of Title 10 of the California Code of
Regulations) may become fully exercisable, subject to reasonable conditions such
as continued employment, at any time or during any period established by the
Company. Subject to the preceding sentence, the vesting of any Option shall be
determined by the Committees at its sole discretion.

                           (iii)    NO FRACTIONAL SHARES. An Option may not be
exercised for a fraction of a Share.

                                       6.

<PAGE>

                           (iv)     EXERCISE. An Option shall be deemed to be
exercised when written notice of such exercise has been given to the Company in
accordance with the terms of the Stock Option Agreement by the person entitled
to exercise the Option and full payment for the Shares with respect to which the
Option is exercised has been received by the Company. Full payment may, as
authorized by the Committee, consist of consideration and method of payment
allowable under Section 8(c) of the Plan.

                           (v)      NO RIGHTS AS A STOCKHOLDER. Until the
issuance (as evidenced by the appropriate entry on the books of the Company or
of a duly authorized transfer agent of the Company) of the stock certificate
evidencing such Shares, no right to vote or receive dividends or any other
rights as a stockholder shall exist with respect to the Optioned Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued) such stock certificate promptly upon exercise of the Option. No
adjustment will be made for a dividend or other right for which the record date
is prior to the date the stock certificate is issued, except as provided in
Section 11 of the Plan.

                  (b)      TERMINATION OF STATUS AS AN EMPLOYEE OR CONSULTANT.
In the event of termination of an Optionee's Continuous Status as an Employee or
Consultant (as the case may be), such Optionee may, at any time within thirty
(30) days or such longer period of time, not exceeding three (3) months in the
case of an Incentive Stock Option or six (6) months in the case of a
Nonstatutory Stock Option as determined by the Board (with such determination in
the case of a Incentive Stock Option being made at the time of grant of the
Option), after the date of such termination (but in no event later than the date
of expiration of the term of such Option as set forth in the Stock Option
Agreement), exercise his Option to the extent that he was entitled to exercise
it at the date of such termination. To the extent that he was not entitled to
exercise the Option at the date of such termination, or if he does not exercise
such Option (which he was entitled to exercise) within the time specified
herein, the Option shall terminate.

                  (c)      DISABILITY OF OPTIONEE. Notwithstanding the
provisions of Section 9(b) above, in the event of termination of an Optionee's
Continuous Status as an Employee or Consultant as a result of his disability, he
may, at any time within six (6) months or such longer period of time, not
exceeding twelve (12) months as determined by the Board (with such determination
in the case of an Incentive Stock Option being made at the time of grant of the
Option), from the date of such termination (but in no event later than the date
of expiration of the term of such Option as set forth in the Stock Option
Agreement), exercise his Option to the extent he was entitled to exercise it at
the date of such termination. To the extent that he was not entitled to exercise
the Option at the date of termination, or if he does not exercise such Option'
(which he was entitled to exercise) within the time specified herein, the Option
shall terminate.

                  (d)      DEATH OF OPTIONEE. In the event of the death of an
Optionee:

                           (i)      during the term of an Option held by an
Optionee who was, at the time of his death, an Employee or Consultant of the
Company and who shall have been in Continuous Status as an Employee or
Consultant since the date of grant of the Option, the Option may be exercised,
at any time within six (6) months following the date of death (but in no event
later than the date of expiration of the term of such Option as set forth in the
Stock Option Agreement), by the Optionee's estate or by a person who acquired
the right to exercise the

                                       7.

<PAGE>

Option by bequest or inheritance, but only to the extent of the right to
exercise that would have accrued had the Optionee continued living and remained
in Continuous Status as an Employee or Consultant six (6) months after the date
of death, subject to the limitation set forth in Section 5(b); or

                           (ii)     within thirty (30) days or such other period
of time, not exceeding three (3) months as determined by the Board (with such
determination in the case of an Incentive Stock Option being made at the time of
grant of the Option), after the termination of Continuous Status as an Employee
or Consultant, the Option may be exercised, at any time within six (6) months
following the date of death (but in no event later than the date of expiration
of the term of such Option as set forth in the Stock Option Agreement), by the
Optionee's estate or by a person who acquired the right to exercise that had
accrued at the date of termination.

         10.      NON-TRANSFERABILITY OF OPTIONS. The Option may not be sold,
pledged, assigned, hypothecated, transferred or disposed of in any manner other
than by will or by the laws of descent or distribution and may be exercised,
during the lifetime of the Optionee, only by the Optionee.

         11.      ADJUSTMENTS UPON CHANGES IN CAPITALIZATION OR MERGER. Subject
to any required action by the stockholders of the Company, the number of shares
of Common Stock covered by each outstanding Option, and the number of shares of
Common Stock which have been authorized for issuance under the Plan but as to
which no Options have yet been granted or which have been returned to the Plan
upon cancellation or expiration of an Option, as well as the price per share of
Common Stock covered by each such outstanding Option, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock or similar transaction. Such
adjustment shall be made by the Board, whose determination in that respect shall
be final, binding and conclusive. Except as expressly provided herein, no
issuance by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall affect, and no adjustment
by reason thereof shall be made with respect to, the number or price of shares
of Common Stock subject to an Option.

         In the event of a dissolution or liquidation of the Company, then all
outstanding Options will terminate immediately prior to such event.

         In the event of (i) a sale, lease or other disposition of all or
substantially all of the assets of the Company, (ii) a merger, consolidation or
similar transaction involving (directly or indirectly) the Company and,
immediately after the consummation of such merger, consolidation or similar
transaction, the stockholders of the Company immediately prior thereto do not
own, directly or indirectly, outstanding voting securities representing more
than fifty percent (50%) of the combined outstanding voting power of the
surviving entity (or the parent of the surviving entity) in such merger,
consolidation or similar transaction or (iii) an acquisition by any person,
entity or group within the meaning of Section 13(d) or 14(d) of the Exchange
Act, or any comparable successor provisions (excluding any employee benefit
plan, or related trust, sponsored or maintained by the Company or an affiliate
of the Company) of the beneficial ownership (within the meaning of Rule 13d-3
promulgated under the Exchange Act, or

                                       8.

<PAGE>

comparable successor rule) of securities of the Company representing at least
fifty percent (50%) of the combined voting power of the Company's then
outstanding securities other than by virtue of a merger, consolidation or
similar transaction, then any surviving corporation or acquiring corporation may
assume or continue any or all Options outstanding under the Plan or may
substitute similar options for Options outstanding under the Plan (it being
understood that similar options include, but are not limited to, options to
acquire the same consideration paid to the stockholders or the Company, as the
case may be, pursuant to the transaction), and any reacquisition or repurchase
rights held by the Company in respect of Common Stock issued pursuant to Options
may be assigned by the Company to the successor of the Company (or the
successor's parent company), if any, in connection with such transaction. In the
event that any surviving corporation or acquiring corporation does not assume or
continue any or all such outstanding Options or substitute similar options for
such outstanding Options, then with respect to Options that have been not
assumed, continued or substituted and that are held by Optionees whose
Continuous Status as an Employee or Consultant has not terminated prior to the
effective time of the transaction, the vesting of such Options (and, if
applicable, the time at which such Options may be exercised) shall (contingent
upon the effectiveness of the transaction) be accelerated in full to a date
prior to the effective time of such transaction as the Board shall determine
(or, if the Board shall not determine such a date, to the date that is five (5)
days prior to the effective time of the transaction), the Options shall
terminate if not exercised (if applicable) at or prior to such effective time,
and any reacquisition or repurchase rights held by the Company with respect to
such Options held by Optionees whose Continuous Status as an Employee or
Consultant has not terminated shall (contingent upon the effectiveness of the
transaction) lapse. With respect to any other Options outstanding under the Plan
that have not been assumed, continued or substituted, the vesting of such
Options (and, if applicable, the time at which such Option may be exercised)
shall not be accelerated, unless otherwise provided in a written agreement
between the Company or any affiliate of the Company and the holder of such
Option, and such Options shall terminate if not exercised (if applicable) prior
to the effective time of the transaction.

         Notwithstanding the vesting schedules set forth in Options outstanding
under the Plan and notwithstanding the preceding paragraph, in the event of a
change in control of the Company described above, (i) Options held by persons
who are then Employees of the Company shall become vested and immediately
exercisable as to one-half (1/2) of the then unvested shares subject to such
Options as of the effective date of the change in control; (ii) the remaining
unvested shares under the Options held by any person who is an Employee and who
holds the title of vice president or higher (an "Executive") shall become fully
vested in the event that such Executive's service with the Company is
involuntarily terminated without Cause (as defined below) or voluntarily
terminated for Good Reason (as defined below), in either case within thirteen
months following the change in control; and (iii) Options held by persons who
are then members of the Board but who are not Employees shall become fully
vested and immediately exercisable as of the effective date of the change in
control.

         For purposes of this Section 11, "Cause" means that, in the reasonable
determination of the Company, the Executive:

                                       9.

<PAGE>

                  (i)      has been indicted or convicted of any felony or any
crime involving dishonesty that is likely to inflict or has inflicted
demonstrable and material injury on the business of the Company;

                  (ii)     has participated in any fraud against the Company; or

                  (iii)    has intentionally damaged any property of the Company
thereby causing demonstrable and material injury to the business of the Company;

provided that Cause shall not exist based on conduct described in clause (ii) or
clause (iii) unless the conduct described in such clause has not been cured
within fifteen (15) days following the Executive's receipt of written notice
from the Company specifying the particulars of the conduct constituting Cause.

         For purposes of this Section 11, "Good Reason" means that Executive
voluntarily terminates employment within thirty (30) days after any of the
following is undertaken without the Executive's express written consent:

                  (i)      a reduction in the Executive's salary grade;

                  (ii)     a reduction by the Company in the Executive's base
salary by five percent (5%) or more; provided, however, that a reduction by the
Company of the Executive's base salary by up to ten percent (10%) shall not
constitute Good Reason for purposes of this Plan if it is made in connection
with an across-the-board reduction by the Company of all Executives' annual base
salaries by a percentage at least equal to the percentage by which the
Executive's base salary is reduced; or

                  (iii)    a relocation of the Executive's business office to a
location more than fifty (50) miles from the location at which the Executive
performs duties as of the effective date of the change in control, except for
required travel by the Executive on the Company's business to an extent
substantially consistent with the Executive's business travel obligations prior
to the effective date of the change in control; provided, however, that no
relocation of the Executive's business office shall constitute Good Reason for
purposes of this Plan if the Executive provides services to the Company from a
remote location (e.g., through telecommuting) at the time of the relocation.

         12.      TIME OF GRANTING OPTIONS. The date of grant of an Option
shall, for all purposes, be the date on which the Committee makes the
determination granting such Option. Notice of the determination shall be given
to each Employee or Consultant to whom an Option is so granted within a
reasonable time after the date of such grant.

         13.      AMENDMENT, SUSPENSION AND TERMINATION OF THE PLAN.

                  (a)      AMENDMENT AND TERMINATION. The Board may amend,
suspend or terminate the Plan at any time in such respects as the Board may deem
advisable; provided that the following revisions or amendments shall require
approval of the stockholders of the Company in the manner described in Section
17 of the Plan:

                                       10.

<PAGE>

                           (i)      any increase in the number of Shares subject
to the Plan, other than in connection with an adjustment under Section 11 of the
Plan;

                           (ii)     any change in the designation of the class
of persons eligible to be granted options; or

                           (iii)    if the Company has a class of equity
securities registered under Section 12 of the Exchange Act at the time of such
revision or amendment, any material increase in the benefits accruing to
participants under the Plan.

                  (b)      STOCKHOLDER APPROVAL. If any amendment requiring
stockholder approval under Section 13(a) of the Plan is made subsequent to the
first registration of any class of equity securities by the Company under
Section 12 of the Exchange Act, such stockholder approval shall be solicited as
described in Section 17 of the Plan.

                  (c)      EFFECT OF AMENDMENT, SUSPENSION OR TERMINATION. Any
such amendment, suspension or termination of the Plan shall not affect Options
already granted and such Options shall remain in full force and effect as if
this Plan had not been amended, suspended or terminated, unless mutually agreed
otherwise between the Optionee and the Committee, which agreement must be in
writing and signed by the Optionee and the Company.

         14.      CONDITIONS UPON ISSUANCE OF SHARES. Shares shall not be issued
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance and delivery of such Shares pursuant thereto shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933, as amended, the Exchange Act, the rules and regulations promulgated
thereunder, and the requirements of any stock exchange upon which the Shares may
then be listed, and shall be further subject to the approval of counsel for the
Company with respect to such compliance.

         Any Shares issued upon exercise of an Option shall be subject to such
rights of repurchase, rights of first refusal and other transfer restrictions as
the Committee may determine. Such restrictions shall be set forth in the
applicable Stock Option Agreement and shall apply in addition to any
restrictions that may apply to holders of Shares generally.

         As a condition to the exercise of an Option, the Company may require
the person exercising such Option to represent and warrant at the time of any
such exercise that the Shares are being purchased only for investment and
without any present intention to sell or distribute such Shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned relevant provisions of law.

         15.      RESERVATION OF SHARES. The Company, during the term of this
Plan, will at all times reserve and keep available such number of Shares as
shall be sufficient to satisfy the requirements of the Plan.

         The inability of the Company to obtain authority from any regulatory
body having jurisdiction, which authority is deemed by the Company's counsel to
be necessary to the lawful issuance and sale of any Shares hereunder, shall
relieve the Company of any liability in respect

                                       11.

<PAGE>

of the failure to issue or sell such Shares as to which such requisite authority
shall not have been obtained.

         16.      STOCK OPTION AGREEMENTS. All Options shall be evidenced by
written Stock Option Agreements or Amended and Restated Stock Option Agreements
in such form as the Committee shall approve. The provisions of the various Stock
Option Agreements need not be identified.

         17.      STOCKHOLDER APPROVAL.

                  (a)      Continuance of the Plan shall be subject to approval
by the stockholders of the Company within twelve (12) months after the date the
Plan is adopted. Any Option exercised before stockholder approval is obtained
shall be rescinded if stockholder approval is not obtained within twelve (12)
months after the plan is adopted. Such Shares shall not be counted in
determining whether such approval is obtained.

                  (b)      If and in the event that the Company registers any
class of equity securities pursuant to Section 12 of the Exchange Act, any
required approval of the stockholders of the Company obtained after such
registration shall be solicited substantially in accordance with Section 14(a)
of the Exchange Act and the rules and regulations promulgated thereunder.

                  (c)      If any required approval by the stockholders of the
Plan itself or of any amendment thereto is solicited at any time otherwise than
as described in Section 17(b) hereof, then the Company shall, at or prior to the
first annual meeting of stockholders held subsequent to the later of (1) the
first registration of any class of equity securities of the Company under
Section 12 of the Exchange Act or (2) the granting of an Option hereunder to an
officer or director after such registration, do the following:

                           (i)      furnish in writing to the stockholders
entitled to vote for the Plan substantially the same information which would be
required (if proxies to be voted with respect to approval or disapproval of the
Plan or amendment were then being solicited) by the rules and regulations in
effect under Section 14(a) of the Exchange Act at the time such information is
furnished; and

                           (ii)     file with, or marl for filing to, the
Securities and Exchange Commission four (4) copies of the written information
referred to in subsection (i) hereof not later than the date on which such
information is first sent or given to stockholders.

         18.      INFORMATION TO OPTIONEES. The Company shall provide to each
Optionee, during the period for which such Optionee has one or more Options
outstanding, financial statements at least annually and copies of all annual
reports and other information which are provided to all stockholders of the
Company. The Company shall not be required to provide such information if the
issuance of Options under the Plan is limited to key employees whose duties in
connection with the Company assure their access to equivalent information.

                                       12.

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