Document:

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                                                                   EXHIBIT 10.23

                              EMPLOYMENT AGREEMENT

     This Employment Agreement is made and entered into by and between Telocity,
Inc. (the "Company") and Scott E. Martin (the "CAO") on December 8, 1999.

     1. Position and Duties: CAO shall be employed by the Company as its
Executive Vice President, Chief Administrative Officer and Corporate Secretary,
reporting only to the Company's Chief Executive Officer or President and Chief
Operating Officer (COO) beginning no later than December 8, 1999 (the "Effective
Date"). CAO shall serve on the most senior management or executive committee of
the Company. CAO agrees to devote his full business time, energy and skill to
his duties at the Company. These duties shall include, without limitation,
senior executive responsibility for the legal and regulatory, human resources,
facilities, materials, procurement, Corporate Secretary functions and all those
senior executive duties customarily performed by the Chief Administrative
Officer and Corporate Secretary, as well as those senior executive duties that
may be assigned by the CEO (or COO as the case may be) from time to time
(collectively, the "Duties").

     2. Term of Employment: CAO's employment with the Company will be for no
specified term, and may be terminated by CAO or the Company at any time, for any
reason, with or without cause, and neither CAO nor the Company shall have any
further obligation or liability whatsoever under this Employment Agreement to
the other, except as may be specifically set forth herein.

     3. Compensation: CAO shall be compensated by the Company for his services
as follows:

          A. Base Salary: CAO shall be paid a monthly Base Salary of $15,800 per
month ($190,000 on an annualized basis), subject to applicable withholding, in
accordance with the Company's normal payroll procedures. CAO's salary shall be
reviewed on at least an annual basis and may be increased as appropriate. In the
event of such an increase, the new amount shall become CAO's Base Salary.

          B. Benefits: CAO shall have the right, on the same basis as other
members of the Company's senior management, to participate in and to receive
benefits under any of the Company's employee benefit plans, as such plans may be
modified from time to time. By way of description and not limitation, CAO shall
be entitled to the benefits afforded to other members of senior management under
the Company's Bonus Program, which shall be defined with sixty (60) days of the
Effective Date and which shall, in any case, contain a bonus amount of up to
100% of CAO's Base Salary with a target bonus of 50% of CAO's Base Salary. CAO
shall be entitled to the benefits afforded to other members of senior management
under the Company's vacation, holiday and business expense reimbursement
policies.

          C. Signing Bonus: Within thirty (30) days of the Effective Date, the
Company will pay CAO a signing bonus in the total amount of $150,000, less
applicable withholding. In the event that CAO voluntarily resigns from his
employment other than for Good Reason during

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the first year following the Effective Date, CAO agrees that he shall repay a
pro-rata share of the signing bonus based on the time remaining in the first
year of service.

     4. Stock Options: CAO shall be granted the option to purchase 245,000
shares of the Company's Common Stock (the "Stock Options"), at an exercise price
per share equal to the fair market value of the Company's Common Stock on the
date of grant as determined by the Board in its sole discretion. Such grant and
determination shall be made no later than twenty (20) days after the Effective
Date. To the extent possible, such Option will be an incentive stock option. The
Stock Options shall vest monthly at the rate of 1/48 per month, however there
shall be a six (6) month cliff, upon which the first 1/8 of the Stock Options
shall vest. Upon the termination of CAO's employment in accordance with the
provisions of Section 7, below, the Stock Options shall vest as described in
such provisions. Except as provided in Section 7, below, the Stock Options shall
be subject to the terms of the Company's Stock Option Plan and the Company's
standard incentive and non-statutory Stock Option Purchase Agreements (the
"Standard Agreements"), provided pursuant to the Company's Stock Option Plan.
CAO will be entitled to participate in future stock option award programs and
equity incentive programs that may exist for senior management of the Company.
CAO will be permitted to exercise the option in full prior to vesting in the
underlying shares, subject to the Company's right to repurchase any unvested
shares at CAO's original cost upon his termination of employment, as provided in
the Standard Agreements. In addition, the Company shall permit CAO to pay the
option exercise price with a full recourse loan (secured by the shares acquired
with the loan) at the lowest interest rate available to avoid the imposition of
imputed income under the tax laws to assist CAO to exercise the Stock Options.
Such loan shall be repayable upon the earlier of (i) the fifth year anniversary
of the Effective Date; (ii) the termination of CAO's employment for any reason;
or (iii) the date twelve (12) months after CAO is first eligible to sell shares
of the Company's stock that he holds following an initial public offering of the
Company's shares; provided, however, that in the event of CAO's termination
without Cause, Death or Disability or Resignation for Good Reason, such loan
shall be repayable upon the earlier of the events stated in clauses (i) or (iii)
immediately preceding.

     5. Housing Allowance: In addition to the Base Salary, beginning on December
6, 1999 and continuing through June 30, 2000, Provided that CAO is continuously
employed as the Company's Chief Administrative Officer, Company shall provide,
at Company's expense, lodging in a corporate apartment within a reasonable
distance of the Company and suitable for a member of the senior management team
of other similarly situated companies.

     6. Definitions Applicable to Terminations: For the purposes of other
terminations as described in Section 7, the following definitions shall apply:

          A. A "Change of Control" is defined as and shall be deemed to have
occurred if any of the following occurs with respect to the Company (except as
may occur with a reincorporation of the Company in Delaware in advance of an
initial public offering of the Company's stock): (i) the direct or indirect sale
or exchange in a single or series of related transactions by the stockholders of
the Company of more than fifty percent (50%) of the voting stock of the Company;
(ii) a merger or consolidation in which the Company is a party; (iii) the

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sale, exchange, or transfer of all or substantially all of the assets of the
Company; or (iv) liquidation or dissolution of the Company.

          B. "Good Reason" shall be defined as and shall be deemed to exist if
any of the following conditions occur, provided that such conditions persist for
fifteen (15) business days after written notice to the Board from CAO and
reasonable opportunity for the Company to cure: (i) the Company, its successor
or assign decreases CAO's Base Salary or Benefits as defined above; (ii) the
Company its successor or assign makes an adverse change in CAO's Position and
Duties, as defined above, or to any additional title, authority,
responsibilities or duties that CAO assumes during the course of his employment
with the Company (provided that the Company or its successor may provide an
equivalent position, with the consent of CAO, which consent will not be
unreasonably withheld); (iii) the Company its successor or assign requires the
relocation of CAO's work place to a location outside of the San Francisco Bay
Area (i.e., outside Marin County, Contra Costa County, Alameda County, San
Francisco County, San Mateo County or Santa Clara County); (iv) the Company its
successor or assign breaches any provision of this Employment Agreement; or (v)
the Company fails to obtain the assumption of this Employment Agreement by any
successor or assign of the Company.

          C. Termination "for Cause" is defined as a termination of CAO based
upon: (i) willful and serious misconduct injurious to the Company, provided the
Company gives written notice to the CAO describing the manner in which it
believes the CAO may have violated this provision and an opportunity to respond;
(ii) conviction of a crime that constitutes a felony; (iii) CAO's willful
refusal to perform any of the Duties as set forth in Section 1, above, provided
the Company gives written notice to the CAO describing the manner in which it
believes the CAO may have violated this provision and an opportunity to correct
such willful refusal; (iv) improper disclosure of the Company's confidential or
proprietary information; (v) any act by CAO undertaken by CAO with the intent to
materially harm the Company's reputation or business, provided the Company gives
written notice to the CAO describing the manner in which it believes the CAO may
have violated this provision and an opportunity to respond; or (vi) any material
breach of this Employment Agreement, which breach, if curable, is not cured
within thirty (30) days following written notice of such breach from the
Company.

     7.  Benefits Upon Termination. CAO agrees that his employment may be
terminated by the Company at any time, for any reason, with or without cause,
and he shall be entitled as his sole remedy and compensation only the
compensation provided, below, in this Section 7. In the event of the termination
of CAO's employment by the Company for any of the reasons set forth below, he
shall be entitled to the following:

          A. Termination for Cause: If CAO's employment is terminated by the
Company For Cause, CAO shall be entitled to no compensation or benefits from the
Company other than those under Section 3 earned up until such termination and,
in the case of the Stock Options under Section 4, shares vested through the date
of termination.

          B. Voluntary Resignation: In the event of CAO's voluntary resignation
from employment with the Company, other than for Good Reason, CAO shall be
entitled to no compensation or benefits from the Company other than those under
Section 3 earned up until

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such termination and, in the case of the Stock Options under Section 4, shares
vested through the date of his resignation.

          C. Death or Disability: In the event that CAO's employment terminates
as a result of his death or continued disability for ninety (90) days
("disability" being defined as the inability to perform the essential functions
of CAO's position), CAO shall be entitled solely to the following as of the date
of death or disability:

          i. all accrued compensation and benefits earned through such date;

          ii. the removal of any "cliff date" in calculating the number of Stock
          Options vested upon the date of death or disability;

          iii. an immediate doubling of the number of Stock Options vested as of
          the date of death or disability, but in no event more than 100% of the
          Stock Options granted.

          D. Change in Control: Termination Without Cause or Resignation for
Good Reason: If within one (1) month prior to or within one (1) year after a
Change in Control, provided that such conditions persist for fifteen (15)
business days after written notice to the CAO, CAO's employment is terminated by
the Company without Cause, or if CAO resigns as CAO of the Company for Good
Reason, then CAO shall be entitled, on such date, as sole remedy, to all of the
following:

          i. all accrued compensation, benefits and vesting earned through the
          date of termination or resignation,

          ii. continued payment of CAO's salary at his Base Salary rate, less
          applicable withholding, for six months year following his termination
          or resignation;

          iii. the removal of any "cliff date" in calculating the number of
          Stock Options vested upon such date; and

          iv. Fifty percent (50%) of the unvested Stock Options shall be deemed
          to have vested immediately upon such termination or resignation
          (provided that Company fails to cure the cause of such resignation
          after notice from CAO).

     E. Absent Change in Control: Termination Without Cause or Resignation for
Good Reason: If there has not been a Change in Control, but CAO's employment is
terminated by the Company without Cause, or if CAO resigns as CAO of the Company
for Good Reason, then CAO shall be entitled, on such date, as sole remedy, to
all of the following:

          i. all accrued compensation, benefits and vesting earned through the
          date of termination or resignation;

          ii. the removal of any "cliff date" in calculating the number of Stock
          Options vested upon such date; and

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          iii. a lump sum payment from the Company in the amount of One Hundred
          Fifty Thousand Dollars ($150,000); and

          iv. continued medical and dental benefits for six (6) months.

     8. Employee Inventions and Proprietary Rights Assignment Agreement: CAO
agrees to abide by the terms and conditions of the Company's standard Employee
Inventions and Proprietary Rights Assignment Agreement.

     9. Non-Solicitation: CAO agrees that for a period of one year after the
date of the termination of his employment for any reason, he shall not, either
directly or indirectly: (i) solicit the services, or attempt to solicit the
services, of any employee of the Company to any other person or entity; or (ii)
solicit or otherwise encourage any customer, supplier or other business contact
of the Company to withdraw, curtail or cancel their business with the Company.

     10. Indemnification: The Company will indemnify CAO to the fullest extent
of applicable law and pursuant to its by-laws and any standard form of
indemnification agreement that may be signed by the Company's other officers and
directors from time to time.

     11. Dispute Resolution: In the event of any dispute or claim relating to or
arising out of this Employment Agreement, CAO and the Company agree that all
such disputes shall be fully and finally resolved by binding arbitration
conducted by the American Arbitration Association in Santa Clara County,
California in accordance with its National Employment Dispute Resolution rules,
as those rules are currently in effect (and not as they may be modified in the
future). CAO acknowledges that by accepting this arbitration provision he is
waiving any right to a jury trial in the event of such dispute. Provided,
however, that this arbitration provision shall not apply to: (1) any disputes or
claims relating to or arising out of the misuse or misappropriation of trade
secrets or proprietary information; or (2) (without acknowledging whether or not
such claims would be viable under the "sole remedy" language set forth in
Section 7, above) any disputes or claims relating to any federal, state or local
law establishing or relating to the rights of employees.

     12. Attorneys' Fees: The prevailing party shall be entitled to recover from
the losing party its attorneys' fees and costs incurred in any action brought to
enforce any right arising out of this Employment Agreement.

     13. Interpretation: CAO and the Company agree that this Employment
Agreement shall be interpreted in accordance with and governed by the laws of
the State of California.

     14. Successors and Assigns: This Employment Agreement shall inure to the
benefit of and be binding upon the Company and its successors and assigns. In
view of the personal nature of the services to be performed under this
Employment Agreement by CAO, he shall not have the right to assign or transfer
any of his rights, obligations or benefits under this Employment Agreement,
except as otherwise noted herein. This agreement may be assigned to the
Company's successor without consent of CAO.

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     15. Entire Agreement: This Employment Agreement constitutes the entire
employment agreement between CAO and the Company regarding the terms and
conditions of his employment with the Company, with the exception of the Stock
Option Agreement described in Section 4 and the Employee Inventions and
Proprietary Rights Assignment Agreement referred to in Section 8, which shall
be modified as necessary to reflect the term relating to options set forth in
the Employment Agreement. To the extent that there is any inconsistency between
this Employment Agreement and any other agreement between CAO and the Company,
the terms of this Employment Agreement will govern. This Employment Agreement
supersedes all prior negotiations, representations or agreements between CAO and
the Company, whether written or oral, concerning CAO's employment by the
Company.

     16. Validity: If any one or more of the provisions (or any part thereof) of
this Employment Agreement shall be held invalid, illegal or unenforceable in any
respect, the validity, legality and enforceability of the remaining provisions
(or any part thereof) shall not in any way be affected or impaired thereby.

     17. Modification: This Employment Agreement and its Addenda may only be
modified or amended by a supplemental written agreement signed by CAO and the
Company.

     18. Counterparts: This Employment Agreement may be executed in any number
of counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

     IN WITNESS WHEREOF, the parties have executed this Employment Agreement as
of the date and year written below.

Date: 12/13/99                        TELOCITY, INC.
      ---------------------

                                      By: /s/ PATTI S. HART
                                          ------------------------------------

                                      Name: Patti Hart

Date: December 13, 1999               Its: President and Chief Executive Officer

                                      /s/ SCOTT E. MARTIN
                                      ----------------------------------------
                                      Scott E. Martin

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                                                                   EXHIBIT 10.24

THE SECURITIES WHICH ARE THE SUBJECT OF THIS AGREEMENT HAVE NOT BEEN QUALIFIED
WITH THE COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE
ISSUANCE OF SUCH SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE
CONSIDERATION THEREFOR PRIOR TO SUCH QUALIFICATION IS UNLAWFUL, UNLESS THE SALE
OF SECURITIES IS EXEMPT FROM QUALIFICATION BY SECTION 25100, 25102, OR 25105 OF
THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF ALL PARTIES TO THIS AGREEMENT
ARE EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION BEING OBTAINED, UNLESS THE
SALE IS SO EXEMPT.

THE SECURITIES WHICH ARE THE SUBJECT OF THIS AGREEMENT HAVE BEEN ACQUIRED FOR
INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR
DISTRIBUTION THEREOF. NO SUCH SALE OR DISPOSITION MAY BE EFFECTED WITHOUT AN
EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL
SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE
SECURITIES ACT OF 1933.

                                 TELOCITY, INC.
                             IMMEDIATELY EXERCISABLE
                       NONSTATUTORY STOCK OPTION AGREEMENT

         THIS IMMEDIATELY EXERCISABLE NONSTATUTORY STOCK OPTION AGREEMENT (the
"OPTION AGREEMENT") is made and entered into as of the Date of Option Grant by
and between Telocity, Inc. and __________________ (the "OPTIONEE").

         The Company has granted to the Optionee pursuant to the Telocity, Inc.
1998 Stock Option Plan (the "Plan") an option to purchase certain shares of
Stock, upon the terms and conditions set forth in this Option Agreement (the
"OPTION"). The Option shall in all respects be subject to the terms and
conditions of the Plan, the provisions of which are incorporated herein by
reference.

         1. DEFINITIONS AND CONSTRUCTION.

                  1.1 DEFINITIONS. Unless otherwise defined herein, capitalized
terms shall have the meanings assigned to such terms in the Plan. Whenever used
herein, the following terms shall have their respective meanings set forth
below:

                           (a) "DATE OF OPTION GRANT" means
____________________, 199__.

                           (b) "NUMBER OF OPTION SHARES" means _________ shares
of Stock, as adjusted from time to time pursuant to Section 9.

                           (c) "EXERCISE PRICE" means $ _______ per share of
Stock, as adjusted from time to time pursuant to Section 9.

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                           (d) "INITIAL EXERCISE DATE" means the later of the
Date of Option Grant or the date the Optionee's Service commences.

                           (e) "INITIAL VESTING DATE" means ___________________.

                           (f) "VESTED PERCENTAGE" means, on any relevant date,
the percentage determined as follows:

<TABLE>
<CAPTION>
                                                                                  Vested Percentage
                                                                                  -----------------
<S>                                                                               <C>
                                    Prior to Initial Vesting Date                            0%

                                    On Initial Vesting Date, provided
                                    the Optionee's Service has not terminated
                                    prior to such date                                 _______%

                                    Plus:

                                    For each full month of the Optionee's
                                    continuous Service from the Initial Vesting
                                    Date until the Vested Percentage equals
                                    100%, an additional                                _______%
</TABLE>

                           (g) "OPTION EXPIRATION DATE" means the date ten (10)
years after the Date of Option Grant.

                  1.2 CONSTRUCTION. Captions and titles contained herein are for
convenience only and shall not affect the meaning or interpretation of any
provision of this Option Agreement. Except when otherwise indicated by the
context, the singular shall include the plural and the plural shall include the
singular. Use of the term "or" is not intended to be exclusive, unless the
context clearly requires otherwise.

         2. TAX CONSEQUENCES.

                  2.1 TAX STATUS OF OPTION. This Option is intended to be a
Nonstatutory Stock Option and shall not be treated as an Incentive Stock Option
within the meaning of Section 422(b) of the Code.

                  2.2 ELECTION UNDER SECTION 83(b) OF THE CODE. If the Optionee
exercises this Option to purchase shares of Stock that are both nontransferable
and subject to a substantial risk of forfeiture, the Optionee understands that
the Optionee should consult with the Optionee's tax advisor regarding the
advisability of filing with the Internal Revenue Service an election under
Section 83(b) of the Code, which must be filed no later than thirty (30) days
after the date on which the Optionee exercises the Option. Shares acquired upon
exercise of the Option are nontransferable and subject to a substantial risk of
forfeiture if, for example, (a) they are unvested and are subject to a right of
the Company to repurchase such shares at the Optionee's original purchase price
if the Optionee's Service terminates, (b) the Optionee is an Insider and,

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under certain circumstances, exercises the Option within six (6) months of the
Date of Option Grant (if a class of equity security of the Company is registered
under Section 12 of the Exchange Act), or (c) the Optionee is subject to a
restriction on transfer to comply with "Pooling-of-Interests Accounting" rules.
Failure to file an election under Section 83(b), if appropriate, may result in
adverse tax consequences to the Optionee. The Optionee acknowledges that the
Optionee has been advised to consult with a tax advisor prior to the exercise of
the Option regarding the tax consequences to the Optionee of the exercise of the
Option. AN ELECTION UNDER SECTION 83(b) MUST BE FILED WITHIN 30 DAYS AFTER THE
DATE ON WHICH THE OPTIONEE PURCHASES SHARES. THIS TIME PERIOD CANNOT BE
EXTENDED. THE OPTIONEE ACKNOWLEDGES THAT TIMELY FILING OF A SECTION 83(b)
ELECTION IS THE OPTIONEE'S SOLE RESPONSIBILITY, EVEN IF THE OPTIONEE REQUESTS
THE COMPANY OR ITS REPRESENTATIVE TO FILE SUCH ELECTION ON HIS OR HER BEHALF.

         3. ADMINISTRATION.

                  All questions of interpretation concerning this Option
Agreement shall be determined by the Board. All determinations by the Board
shall be final and binding upon all persons having an interest in the Option.
Any officer of a Participating Company shall have the authority to act on behalf
of the Company with respect to any matter, right, obligation, or election which
is the responsibility of or which is allocated to the Company herein, provided
the officer has apparent authority with respect to such matter, right,
obligation, or election.

         4. EXERCISE OF THE OPTION.

                  4.1 RIGHT TO EXERCISE. Except as otherwise provided herein,
the Option shall be exercisable on and after the Initial Exercise Date and prior
to the termination of the Option (as provided in Section 6) in an amount not to
exceed the Number of Option Shares less the number of shares previously acquired
upon exercise of the Option, subject to the Optionee's agreement that any shares
purchased upon exercise are subject to the Company's repurchase rights set forth
in Section 11 and Section 12.

                  4.2 METHOD OF EXERCISE. Exercise of the Option shall be by
written notice to the Company which must state the election to exercise the
Option, the number of whole shares of Stock for which the Option is being
exercised and such other representations and agreements as to the Optionee's
investment intent with respect to such shares as may be required pursuant to the
provisions of this Option Agreement. The written notice must be signed by the
Optionee and must be delivered in person, by certified or registered mail,
return receipt requested, by confirmed facsimile transmission, or by such other
means as the Company may permit, to the Chief Financial Officer of the Company,
or other authorized representative of the Participating Company Group, prior to
the termination of the Option as set forth in Section 6, accompanied by (i) full
payment of the aggregate Exercise Price for the number of shares of Stock being
purchased and (ii) an executed copy, if required herein, of the then current
form of escrow agreement referenced below. The Option shall be deemed to be
exercised upon receipt by the Company of such written notice, the aggregate
Exercise Price, and, if required by the Company, such executed agreement.

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                  4.3 PAYMENT OF EXERCISE PRICE.

                           (a) FORMS OF CONSIDERATION AUTHORIZED. Except as
otherwise provided below, payment of the aggregate Exercise Price for the number
of shares of Stock for which the Option is being exercised shall be made (i) in
cash, by check, or cash equivalent, (ii) by tender to the Company, or
attestation to the ownership, of whole shares of Stock owned by the Optionee
having a Fair Market Value (as determined by the Company without regard to any
restrictions on transferability applicable to such stock by reason of federal or
state securities laws or agreements with an underwriter for the Company) not
less than the aggregate Exercise Price, (iii) by means of a Cashless Exercise,
as defined in Section 4.3(c), or (iv) by any combination of the foregoing.

                           (b) TENDER OF STOCK. Notwithstanding the foregoing,
the Option may not be exercised by tender to the Company, or attestation to the
ownership, of shares of Stock to the extent such tender, or attestation to the
ownership, of Stock would constitute a violation of the provisions of any law,
regulation or agreement restricting the redemption of the Company's stock. The
Option may not be exercised by tender to the Company, or attestation to the
ownership, of shares of Stock unless such shares either have been owned by the
Optionee for more than six (6) months or were not acquired, directly or
indirectly, from the Company.

                           (c) CASHLESS EXERCISE. A "CASHLESS EXERCISE" means
the assignment in a form acceptable to the Company of the proceeds of a sale or
loan with respect to some or all of the shares of Stock acquired upon the
exercise of the Option pursuant to a program or procedure approved by the
Company (including, without limitation, through an exercise complying with the
provisions of Regulation T as promulgated from time to time by the Board of
Governors of the Federal Reserve System). The Company reserves, at any and all
times, the right, in the Company's sole and absolute discretion, to decline to
approve or terminate any such program or procedure.

                  4.4 TAX WITHHOLDING. At the time the Option is exercised, in
whole or in part, or at any time thereafter as requested by the Company, the
Optionee hereby authorizes withholding from payroll and any other amounts
payable to the Optionee, and otherwise agrees to make adequate provision for
(including by means of a Cashless Exercise to the extent permitted by the
Company), any sums required to satisfy the federal, state, local and foreign tax
withholding obligations of the Participating Company Group, if any, which arise
in connection with the Option, including, without limitation, obligations
arising upon (i) the exercise, in whole or in part, of the Option, (ii) the
transfer, in whole or in part, of any shares acquired upon exercise of the
Option, (iii) the operation of any law or regulation providing for the
imputation of interest, or (iv) the lapsing of any restriction with respect to
any shares acquired upon exercise of the Option. The Optionee is cautioned that
the Option is not exercisable unless the tax withholding obligations of the
Participating Company Group are satisfied. Accordingly, the Optionee may not be
able to exercise the Option when desired even though the Option is vested, and
the Company shall have no obligation to issue a certificate for such shares or
release such shares from any escrow provided for herein.

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                  4.5 CERTIFICATE REGISTRATION. Except in the event the Exercise
Price is paid by means of a Cashless Exercise, the certificate for the shares as
to which the Option is exercised shall be registered in the name of the
Optionee, or, if applicable, in the names of the heirs of the Optionee.

                  4.6 RESTRICTIONS ON GRANT OF THE OPTION AND ISSUANCE OF
SHARES. The grant of the Option and the issuance of shares of Stock upon
exercise of the Option shall be subject to compliance with all applicable
requirements of federal, state or foreign law with respect to such securities.
The Option may not be exercised if the issuance of shares of Stock upon exercise
would constitute a violation of any applicable federal, state or foreign
securities laws or other law or regulations or the requirements of any stock
exchange or market system upon which the Stock may then be listed. In addition,
the Option may not be exercised unless (i) a registration statement under the
Securities Act shall at the time of exercise of the Option be in effect with
respect to the shares issuable upon exercise of the Option or (ii) in the
opinion of legal counsel to the Company, the shares issuable upon exercise of
the Option may be issued in accordance with the terms of an applicable exemption
from the registration requirements of the Securities Act. THE OPTIONEE IS
CAUTIONED THAT THE OPTION MAY NOT BE EXERCISED UNLESS THE FOREGOING CONDITIONS
ARE SATISFIED. ACCORDINGLY, THE OPTIONEE MAY NOT BE ABLE TO EXERCISE THE OPTION
WHEN DESIRED EVEN THOUGH THE OPTION IS VESTED. The inability of the Company to
obtain from any regulatory body having jurisdiction the authority, if any,
deemed by the Company's legal counsel to be necessary to the lawful issuance and
sale of any shares subject to the Option shall relieve the Company of any
liability in respect of the failure to issue or sell such shares as to which
such requisite authority shall not have been obtained. As a condition to the
exercise of the Option, the Company may require the Optionee to satisfy any
qualifications that may be necessary or appropriate, to evidence compliance with
any applicable law or regulation and to make any representation or warranty with
respect thereto as may be requested by the Company.

                  4.7 FRACTIONAL SHARES. The Company shall not be required to
issue fractional shares upon the exercise of the Option.

         5. NONTRANSFERABILITY OF THE OPTION.

                  The Option may be exercised during the lifetime of the
Optionee only by the Optionee or the Optionee's guardian or legal representative
and may not be assigned or transferred in any manner except by will or by the
laws of descent and distribution. Following the death of the Optionee, the
Option, to the extent provided in Section 7, may be exercised by the Optionee's
legal representative or by any person empowered to do so under the deceased
Optionee's will or under the then applicable laws of descent and distribution.

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         6. TERMINATION OF THE OPTION.

                  The Option shall terminate and may no longer be exercised on
the first to occur of (a) the Option Expiration Date, (b) the last date for
exercising the Option following termination of the Optionee's Service as
described in Section 7, or (c) a Change in Control to the extent provided in
Section 8.

         7. EFFECT OF TERMINATION OF SERVICE.

                  7.1 OPTION EXERCISABILITY.

                           (a) DISABILITY. If the Optionee's Service with the
Participating Company Group is terminated because of the Disability of the
Optionee, the Option, to the extent unexercised and exercisable on the date on
which the Optionee's Service terminated, may be exercised by the Optionee (or
the Optionee's guardian or legal representative) at any time prior to the
expiration of six (6) months after the date on which the Optionee's Service
terminated, but in any event no later than the Option Expiration Date.

                           (b) DEATH. If the Optionee's Service with the
Participating Company Group is terminated because of the death of the Optionee,
the Option, to the extent unexercised and exercisable on the date on which the
Optionee's Service terminated, may be exercised by the Optionee's legal
representative or other person who acquired the right to exercise the Option by
reason of the Optionee's death at any time prior to the expiration of six (6)
months after the date on which the Optionee's Service terminated, but in any
event no later than the Option Expiration Date. The Optionee's Service shall be
deemed to have terminated on account of death if the Optionee dies within one
(1) month after the Optionee's termination of Service.

                           (c) OTHER TERMINATION OF SERVICE. If the Optionee's
Service with the Participating Company Group terminates for any reason, except
Disability or death, the Option, to the extent unexercised and exercisable by
the Optionee on the date on which the Optionee's Service terminated, may be
exercised by the Optionee within one (1) month (or such other longer period of
time as determined by the Board, in its sole discretion) after the date on which
the Optionee's Service terminated, but in any event no later than the Option
Expiration Date.

                  7.2 ADDITIONAL LIMITATIONS ON OPTION EXERCISE. Notwithstanding
the provisions of Section 7.1, the Option may not be exercised after the
Optionee's termination of Service to the extent that the shares to be acquired
upon exercise of the Option would be subject to the Unvested Share Repurchase
Option as provided in Section 11.

                  7.3 EXTENSION IF EXERCISE PREVENTED BY LAW. Notwithstanding
the foregoing, if the exercise of the Option within the applicable time periods
set forth in Section 7.1 is prevented by the provisions of Section 4.6, the
Option shall remain exercisable until one (1) month after the date the Optionee
is notified by the Company that the Option is exercisable, but in any event no
later than the Option Expiration Date.

                                       6
<PAGE>   7
                  7.4 EXTENSION IF OPTIONEE SUBJECT TO SECTION 16(b).
Notwithstanding the foregoing, if a sale within the applicable time periods set
forth in Section 7.1 of shares acquired upon the exercise of the Option would
subject the Optionee to suit under Section 16(b) of the Exchange Act, the Option
shall remain exercisable until the earliest to occur of (i) the tenth (10th) day
following the date on which a sale of such shares by the Optionee would no
longer be subject to such suit, (ii) the one hundred and ninetieth (190th) day
after the Optionee's termination of Service, or (iii) the Option Expiration
Date.

         8. CHANGE IN CONTROL.

                  8.1 DEFINITIONS.

                           (a) An "OWNERSHIP CHANGE EVENT" shall be deemed to
have occurred if any of the following occurs with respect to the Company:

                                    (i) the direct or indirect sale or exchange
in a single or series of related transactions by the shareholders of the Company
of more than fifty percent (50%) of the voting stock of the Company;

                                    (ii) a merger or consolidation in which the
Company is a party; or

                                    (iii) the sale, exchange, or transfer of all
or substantially all of the assets of the Company; or

                                    (iv) a liquidation or dissolution of the
Company.

                           (b) A "CHANGE IN CONTROL" shall mean an Ownership
Change Event or a series of related Ownership Change Events (collectively, the
"TRANSACTION") wherein the shareholders of the Company immediately before the
Transaction do not retain immediately after the Transaction, in substantially
the same proportions as their ownership of shares of the Company's voting stock
immediately before the Transaction, direct or indirect beneficial ownership of
more than fifty percent (50%) of the total combined voting power of the
outstanding voting stock of the Company or the corporation or corporations to
which the assets of the Company were transferred (the "TRANSFEREE
CORPORATION(s)"), as the case may be. For purposes of the preceding sentence,
indirect beneficial ownership shall include, without limitation, an interest
resulting from ownership of the voting stock of one or more corporations which,
as a result of the Transaction, own the Company or the Transferee
Corporation(s), as the case may be, either directly or through one or more
subsidiary corporations. The Board shall have the right to determine whether
multiple sales or exchanges of the voting stock of the Company or multiple
Ownership Change Events are related, and its determination shall be final,
binding and conclusive.

                  8.2 EFFECT OF CHANGE IN CONTROL ON OPTION. In the event of a
Change in Control, the surviving, continuing, successor, or purchasing
corporation or parent corporation thereof, as the case may be (the "ACQUIRING
CORPORATION"), may either assume the Company's

                                       7
<PAGE>   8
rights and obligations under the Option or substitute for the Option a
substantially equivalent option for the Acquiring Corporation's stock. The
Option shall terminate and cease to be outstanding effective as of the date of
the Change in Control to the extent that the Option is neither assumed or
substituted for by the Acquiring Corporation in connection with the Change in
Control nor exercised as of the date of the Change in Control. Notwithstanding
the foregoing, shares acquired upon exercise of the Option prior to the Change
in Control and any consideration received pursuant to the Change in Control with
respect to such shares shall continue to be subject to all applicable provisions
of this Option Agreement except as otherwise provided herein. Furthermore,
notwithstanding the foregoing, if the corporation the stock of which is subject
to the Option immediately prior to an Ownership Change Event described in
Section 8.1(a)(i) constituting a Change in Control is the surviving or
continuing corporation and immediately after such Ownership Change Event less
than fifty percent (50%) of the total combined voting power of its voting stock
is held by another corporation or by other corporations that are members of an
affiliated group within the meaning of Section 1504(a) of the Code without
regard to the provisions of Section 1504(b) of the Code, the Option shall not
terminate unless the Board otherwise provides in its sole discretion.

         9. ADJUSTMENTS FOR CHANGES IN CAPITAL STRUCTURE.

                  In the event of any stock dividend, stock split, reverse stock
split, recapitalization, combination, reclassification, or similar change in the
capital structure of the Company, appropriate adjustments shall be made in the
number, Exercise Price and class of shares of stock subject to the Option. If a
majority of the shares which are of the same class as the shares that are
subject to the Option are exchanged for, converted into, or otherwise become
(whether or not pursuant to an Ownership Change Event) shares of another
corporation (the "NEW SHARES"), the Board may unilaterally amend the Option to
provide that the Option is exercisable for New Shares. In the event of any such
amendment, the Number of Option Shares and the Exercise Price shall be adjusted
in a fair and equitable manner, as determined by the Board, in its sole
discretion. Notwithstanding the foregoing, any fractional share resulting from
an adjustment pursuant to this Section 9 shall be rounded up or down to the
nearest whole number, as determined by the Board, and in no event may the
Exercise Price be decreased to an amount less than the par value, if any, of the
stock subject to the Option. The adjustments determined by the Board pursuant to
this Section 9 shall be final, binding and conclusive.

         10. RIGHTS AS A SHAREHOLDER, EMPLOYEE OR CONSULTANT.

                  The Optionee shall have no rights as a shareholder with
respect to any shares covered by the Option until the date of the issuance of a
certificate for the shares for which the Option has been exercised (as evidenced
by the appropriate entry on the books of the Company or of a duly authorized
transfer agent of the Company). No adjustment shall be made for dividends,
distributions or other rights for which the record date is prior to the date
such certificate is issued, except as provided in Section 9. If the Optionee is
an Employee, the Optionee understands and acknowledges that, except as otherwise
provided in a separate, written employment agreement between a Participating
Company and the Optionee, the Optionee's employment is "at will" and is for no
specified term. Nothing in this Option Agreement shall confer upon the Optionee
any right to continue in the Service of a Participating Company or

                                       8
<PAGE>   9
interfere in any way with any right of the Participating Company Group to
terminate the Optionee's Service as an Employee or Consultant, as the case may
be, at any time.

         11. UNVESTED SHARE REPURCHASE OPTION.

                  11.1 GRANT OF UNVESTED SHARE REPURCHASE OPTION. In the event
the Optionee's Service with the Participating Company Group is terminated for
any reason or no reason, with or without cause, or, if the Optionee, the
Optionee's legal representative, or other holder of shares acquired upon
exercise of the Option attempts to sell, exchange, transfer, pledge, or
otherwise dispose of (other than pursuant to an Ownership Change Event) any
shares acquired upon exercise of the Option which exceed the Vested Shares as
defined in Section 11.2 below (the "UNVESTED SHARES"), the Company shall have
the right to repurchase the Unvested Shares under the terms and subject to the
conditions set forth in this Section 11 (the "UNVESTED SHARE REPURCHASE
Option").

                  11.2 VESTED SHARES AND UNVESTED SHARES DEFINED. The "VESTED
SHARES" shall mean, on any given date, a number of shares of Stock equal to the
Number of Option Shares multiplied by the Vested Percentage determined as of
such date and rounded down to the nearest whole share. On such given date, the
"UNVESTED SHARES" shall mean the number of shares of Stock acquired upon
exercise of the Option which exceed the Vested Shares determined as of such
date.

                  11.3 EXERCISE OF UNVESTED SHARE REPURCHASE OPTION. The Company
may exercise the Unvested Share Repurchase Option by written notice to the
Optionee within sixty (60) days after (a) termination of the Optionee's Service
(or exercise of the Option, if later) or (b) the Company has received notice of
the attempted disposition of Unvested Shares. If the Company fails to give
notice within such sixty (60) day period, the Unvested Share Repurchase Option
shall terminate unless the Company and the Optionee have extended the time for
the exercise of the Unvested Share Repurchase Option. The Unvested Share
Repurchase Option must be exercised, if at all, for all of the Unvested Shares,
except as the Company and the Optionee otherwise agree.

                  11.4 PAYMENT FOR SHARES AND RETURN OF SHARES TO COMPANY. The
purchase price per share being repurchased by the Company shall be an amount
equal to the Optionee's original cost per share, as adjusted pursuant to Section
9 (the "REPURCHASE PRICE"). The Company shall pay the aggregate Repurchase Price
to the Optionee in cash within thirty (30) days after the date of the written
notice to the Optionee of the Company's exercise of the Unvested Share
Repurchase Option. For purposes of the foregoing, cancellation of any purchase
money indebtedness of the Optionee to any Participating Company for the shares
shall be treated as payment to the Optionee in cash to the extent of the unpaid
principal and any accrued interest canceled. The shares being repurchased shall
be delivered to the Company by the Optionee at the same time as the delivery of
the Repurchase Price to the Optionee.

                  11.5 ASSIGNMENT OF UNVESTED SHARE REPURCHASE OPTION. The
Company shall have the right to assign the Unvested Share Repurchase Option at
any time, whether or not such option is then exercisable, to one or more persons
as may be selected by the Company.

                                       9
<PAGE>   10
                  11.6 OWNERSHIP CHANGE EVENT. Upon the occurrence of an
Ownership Change Event, any and all new, substituted or additional securities or
other property to which the Optionee is entitled by reason of the Optionee's
ownership of Unvested Shares shall be immediately subject to the Unvested Share
Repurchase Option and included in the terms "Stock" and "Unvested Shares" for
all purposes of the Unvested Share Repurchase Option with the same force and
effect as the Unvested Shares immediately prior to the Ownership Change Event.
While the aggregate Repurchase Price shall remain the same after such Ownership
Change Event, the Repurchase Price per Unvested Share upon exercise of the
Unvested Share Repurchase Option following such Ownership Change Event shall be
adjusted as appropriate. For purposes of determining the Vested Percentage
following an Ownership Change Event, credited Service shall include all Service
with any corporation which is a Participating Company at the time the Service is
rendered, whether or not such corporation is a Participating Company both before
and after the Ownership Change Event.

         12. RIGHT OF FIRST REFUSAL.

                  12.1 GRANT OF RIGHT OF FIRST REFUSAL. Except as provided in
Section 12.7 below, in the event the Optionee, the Optionee's legal
representative, or other holder of shares acquired upon exercise of the Option
proposes to sell, exchange, transfer, pledge, or otherwise dispose of any Vested
Shares (the "TRANSFER SHARES") to any person or entity, including, without
limitation, any shareholder of a Participating Company, the Company shall have
the right to repurchase the Transfer Shares under the terms and subject to the
conditions set forth in this Section 12 (the "RIGHT OF FIRST REFUSAL").

                  12.2 NOTICE OF PROPOSED TRANSFER. Prior to any proposed
transfer of the Transfer Shares, the Optionee shall deliver written notice (the
"TRANSFER NOTICE") to the Company describing fully the proposed transfer,
including the number of Transfer Shares, the name and address of the proposed
transferee (the "PROPOSED TRANSFEREE") and, if the transfer is voluntary, the
proposed transfer price, and containing such information necessary to show the
bona fide nature of the proposed transfer. In the event of a bona fide gift or
involuntary transfer, the proposed transfer price shall be deemed to be the Fair
Market Value of the Transfer Shares, as determined by the Board in good faith.
If the Optionee proposes to transfer any Transfer Shares to more than one
Proposed Transferee, the Optionee shall provide a separate Transfer Notice for
the proposed transfer to each Proposed Transferee. The Transfer Notice shall be
signed by both the Optionee and the Proposed Transferee and must constitute a
binding commitment of the Optionee and the Proposed Transferee for the transfer
of the Transfer Shares to the Proposed Transferee subject only to the Right of
First Refusal.

                  12.3 BONA FIDE TRANSFER. If the Company determines that the
information provided by the Optionee in the Transfer Notice is insufficient to
establish the bona fide nature of a proposed voluntary transfer, the Company
shall give the Optionee written notice of the Optionee's failure to comply with
the procedure described in this Section 12, and the Optionee shall have no right
to transfer the Transfer Shares without first complying with the procedure
described in this Section 12. The Optionee shall not be permitted to transfer
the Transfer Shares if the proposed transfer is not bona fide.

                                       10
<PAGE>   11
                  12.4 EXERCISE OF RIGHT OF FIRST REFUSAL. If the Company
determines the proposed transfer to be bona fide, the Company shall have the
right to purchase all, but not less than all, of the Transfer Shares (except as
the Company and the Optionee otherwise agree) at the purchase price and on the
terms set forth in the Transfer Notice by delivery to the Optionee of a notice
of exercise of the Right of First Refusal within thirty (30) days after the date
the Transfer Notice is delivered to the Company. The Company's exercise or
failure to exercise the Right of First Refusal with respect to any proposed
transfer described in a Transfer Notice shall not affect the Company's right to
exercise the Right of First Refusal with respect to any proposed transfer
described in any other Transfer Notice, whether or not such other Transfer
Notice is issued by the Optionee or issued by a person other than the Optionee
with respect to a proposed transfer to the same Proposed Transferee. If the
Company exercises the Right of First Refusal, the Company and the Optionee shall
thereupon consummate the sale of the Transfer Shares to the Company on the terms
set forth in the Transfer Notice within sixty (60) days after the date the
Transfer Notice is delivered to the Company (unless a longer period is offered
by the Proposed Transferee); provided, however, that in the event the Transfer
Notice provides for the payment for the Transfer Shares other than in cash, the
Company shall have the option of paying for the Transfer Shares by the present
value cash equivalent of the consideration described in the Transfer Notice as
reasonably determined by the Company. For purposes of the foregoing,
cancellation of any indebtedness of the Optionee to any Participating Company
shall be treated as payment to the Optionee in cash to the extent of the unpaid
principal and any accrued interest canceled.

                  12.5 FAILURE TO EXERCISE RIGHT OF FIRST REFUSAL. If the
Company fails to exercise the Right of First Refusal in full (or to such lesser
extent as the Company and the Optionee otherwise agree) within the period
specified in Section 12.4 above, the Optionee may conclude a transfer to the
Proposed Transferee of the Transfer Shares on the terms and conditions described
in the Transfer Notice, provided such transfer occurs not later than ninety (90)
days following delivery to the Company of the Transfer Notice. The Company shall
have the right to demand further assurances from the Optionee and the Proposed
Transferee (in a form satisfactory to the Company) that the transfer of the
Transfer Shares was actually carried out on the terms and conditions described
in the Transfer Notice. No Transfer Shares shall be transferred on the books of
the Company until the Company has received such assurances, if so demanded, and
has approved the proposed transfer as bona fide. Any proposed transfer on terms
and conditions different from those described in the Transfer Notice, as well as
any subsequent proposed transfer by the Optionee, shall again be subject to the
Right of First Refusal and shall require compliance by the Optionee with the
procedure described in this Section 12.

                  12.6 TRANSFEREES OF TRANSFER SHARES. All transferees of the
Transfer Shares or any interest therein, other than the Company, shall be
required as a condition of such transfer to agree in writing (in a form
satisfactory to the Company) that such transferee shall receive and hold such
Transfer Shares or interest therein subject to all of the terms and conditions
of this Option Agreement, including this Section 12 providing for the Right of
First Refusal with respect to any subsequent transfer. Any sale or transfer of
any shares acquired upon exercise of the Option shall be void unless the
provisions of this Section 12 are met.

                                       11
<PAGE>   12
                  12.7 TRANSFERS NOT SUBJECT TO RIGHT OF FIRST REFUSAL. The
Right of First Refusal shall not apply to any transfer or exchange of the shares
acquired upon exercise of the Option if such transfer or exchange is in
connection with an Ownership Change Event. If the consideration received
pursuant to such transfer or exchange consists of stock of a Participating
Company, such consideration shall remain subject to the Right of First Refusal
unless the provisions of Section 12.9 below result in a termination of the Right
of First Refusal.

                  12.8 ASSIGNMENT OF RIGHT OF FIRST REFUSAL. The Company shall
have the right to assign the Right of First Refusal at any time, whether or not
there has been an attempted transfer, to one or more persons as may be selected
by the Company.

                  12.9 EARLY TERMINATION OF RIGHT OF FIRST REFUSAL. The other
provisions of this Option Agreement notwithstanding, the Right of First Refusal
shall terminate and be of no further force and effect upon (a) the occurrence of
a Change in Control, unless the Acquiring Corporation assumes the Company's
rights and obligations under the Option or substitutes a substantially
equivalent option for the Acquiring Corporation's stock for the Option, or (b)
the existence of a public market for the class of shares subject to the Right of
First Refusal. A "PUBLIC MARKET" shall be deemed to exist if (i) such stock is
listed on a national securities exchange (as that term is used in the Exchange
Act) or (ii) such stock is traded on the over-the-counter market and prices
therefor are published daily on business days in a recognized financial journal.

         13. ESCROW.

                  13.1 ESTABLISHMENT OF ESCROW. To ensure that shares subject to
the Unvested Share Repurchase Option will be available for repurchase, the
Company may require the Optionee to deposit the certificate evidencing the
shares which the Optionee purchases upon exercise of the Option with an agent
designated by the Company under the terms and conditions of escrow and security
agreements approved by the Company. If the Company does not require such deposit
as a condition of exercise of the Option, the Company reserves the right at any
time to require the Optionee to so deposit the certificate in escrow. Upon the
occurrence of an Ownership Change Event or a change, as described in Section 9,
in the character or amount of any of the outstanding stock of the corporation
the stock of which is subject to the provisions of this Option Agreement, any
and all new, substituted or additional securities or other property to which the
Optionee is entitled by reason of the Optionee's ownership of shares of Stock
acquired upon exercise of the Option that remain, following such Ownership
Change Event or change described in Section 9, subject to the Unvested Share
Repurchase Option shall be immediately subject to the escrow to the same extent
as such shares of Stock immediately before such event. The Company shall bear
the expenses of the escrow.

                  13.2 DELIVERY OF SHARES TO OPTIONEE. As soon as practicable
after the expiration of the Unvested Share Repurchase Option, but not more
frequently than twice each calendar year, the escrow agent shall deliver to the
Optionee the shares and any other property no longer subject to such
restrictions and no longer securing any promissory note.

                                       12
<PAGE>   13
                  13.3 NOTICES AND PAYMENTS. In the event the shares and any
other property held in escrow are subject to the Company's exercise of the
Unvested Share Repurchase Option or the Right of First Refusal, the notices
required to be given to the Optionee shall be given to the escrow agent, and any
payment required to be given to the Optionee shall be given to the escrow agent.
Within thirty (30) days after payment by the Company, the escrow agent shall
deliver the shares and any other property which the Company has purchased to the
Company and shall deliver the payment received from the Company to the Optionee.

         14. STOCK DISTRIBUTIONS SUBJECT TO OPTION AGREEMENT.

                  If, from time to time, there is any stock dividend, stock
split or other change, as described in Section 9, in the character or amount of
any of the outstanding stock of the corporation the stock of which is subject to
the provisions of this Option Agreement, then in such event any and all new,
substituted or additional securities to which the Optionee is entitled by reason
of the Optionee's ownership of the shares acquired upon exercise of the Option
shall be immediately subject to the Unvested Share Repurchase Option and the
Right of First Refusal with the same force and effect as the shares subject to
the Unvested Share Repurchase Option and the Right of First Refusal immediately
before such event.

         15. LEGENDS.

                  The Company may at any time place legends referencing the
Unvested Share Repurchase Option, the Right of First Refusal, and any applicable
federal, state or foreign securities law restrictions on all certificates
representing shares of stock subject to the provisions of this Option Agreement.
The Optionee shall, at the request of the Company, promptly present to the
Company any and all certificates representing shares acquired pursuant to the
Option in the possession of the Optionee in order to carry out the provisions of
this Section. Unless otherwise specified by the Company, legends placed on such
certificates may include, but shall not be limited to, the following:

                  15.1 "THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE
SOLD, TRANSFERRED, ASSIGNED OR HYPOTHECATED UNLESS THERE IS AN EFFECTIVE
REGISTRATION STATEMENT UNDER SUCH ACT COVERING SUCH SECURITIES, THE SALE IS MADE
IN ACCORDANCE WITH RULE 144 OR RULE 701 UNDER THE ACT, OR THE COMPANY RECEIVES
AN OPINION OF COUNSEL FOR THE HOLDER OF THESE SECURITIES REASONABLY SATISFACTORY
TO THE COMPANY, STATING THAT SUCH SALE, TRANSFER, ASSIGNMENT OR HYPOTHECATION IS
EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SUCH ACT."

                  15.2 "THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT
TO AN UNVESTED SHARE REPURCHASE OPTION IN FAVOR OF THE CORPORATION OR ITS
ASSIGNEE SET FORTH IN AN AGREEMENT BETWEEN THE CORPORATION AND THE REGISTERED
HOLDER, OR SUCH HOLDER'S

                                       13
<PAGE>   14
PREDECESSOR IN INTEREST, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF
THIS CORPORATION."

                  15.3 "THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT
TO A RIGHT OF FIRST REFUSAL OPTION IN FAVOR OF THE CORPORATION OR ITS ASSIGNEE
SET FORTH IN AN AGREEMENT BETWEEN THE CORPORATION AND THE REGISTERED HOLDER, OR
SUCH HOLDER'S PREDECESSOR IN INTEREST, A COPY OF WHICH IS ON FILE AT THE
PRINCIPAL OFFICE OF THIS CORPORATION."

         16. PUBLIC OFFERING.

                  The Optionee hereby agrees that in the event of any
underwritten public offering of stock, including an initial public offering of
stock, made by the Company pursuant to an effective registration statement filed
under the Securities Act, the Optionee shall not offer, sell, contract to sell,
pledge, hypothecate, grant any option to purchase or make any short sale of, or
otherwise dispose of any shares of stock of the Company or any rights to acquire
stock of the Company for such period of time from and after the effective date
of such registration statement as may be established by the underwriter for such
public offering; provided, however, that such period of time shall not exceed
one hundred eighty (180) days from the effective date of the registration
statement to be filed in connection with such public offering. The foregoing
limitation shall not apply to shares registered in the public offering under the
Securities Act. The Optionee shall be subject to this Section provided and only
if the officers and directors of the Company are also subject to similar
arrangements.

         17. RESTRICTIONS ON TRANSFER OF SHARES.

                  No shares acquired upon exercise of the Option may be sold,
exchanged, transferred (including, without limitation, any transfer to a nominee
or agent of the Optionee), assigned, pledged, hypothecated or otherwise disposed
of, including by operation of law, in any manner which violates any of the
provisions of this Option Agreement and, except pursuant to an Ownership Change
Event, until the date on which such shares become Vested Shares, and any such
attempted disposition shall be void. The Company shall not be required (a) to
transfer on its books any shares which will have been transferred in violation
of any of the provisions set forth in this Option Agreement or (b) to treat as
owner of such shares or to accord the right to vote as such owner or to pay
dividends to any transferee to whom such shares will have been so transferred.

         18. BINDING EFFECT.

                  Subject to the restrictions on transfer set forth herein, this
Option Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, executors, administrators, successors and
assigns.

                                       14
<PAGE>   15
         19. TERMINATION OR AMENDMENT.

                  The Board may terminate or amend the Plan or the Option at any
time; provided, however, that except as provided in Section 8.2 in connection
with a Change in Control, no such termination or amendment may adversely affect
the Option or any unexercised portion hereof without the consent of the Optionee
unless such termination or amendment is necessary to comply with any applicable
law or government regulation. No amendment or addition to this Option Agreement
shall be effective unless in writing.

         20. NOTICES.

                  Any notice required or permitted hereunder shall be given in
writing and shall be deemed effectively given (except to the extent that this
Option Agreement provides for effectiveness only upon actual receipt of such
notice) upon personal delivery or upon deposit in the United States Post Office,
by registered or certified mail, with postage and fees prepaid, addressed to the
other party at the address shown below that party's signature or at such other
address as such party may designate in writing from time to time to the other
party.

         21. INTEGRATED AGREEMENT.

                  This Option Agreement and the Plan constitute the entire
understanding and agreement of the Optionee and the Participating Company Group
with respect to the subject matter contained herein and therein and there are no
agreements, understandings, restrictions, representations, or warranties among
the Optionee and the Participating Company Group with respect to such subject
matter other than those as set forth or provided for herein or therein. To the
extent contemplated herein or therein, the provisions of this Option Agreement
shall survive any exercise of the Option and shall remain in full force and
effect.

                                       15
<PAGE>   16
         22. APPLICABLE LAW.

                  This Option Agreement shall be governed by the laws of the
State of California as such laws are applied to agreements between California
residents entered into and to be performed entirely within the State of
California.

                                       TELOCITY, INC.

                                       By:
                                          --------------------------------------

                                       Title:
                                             -----------------------------------
                                       Address:  10355 North DeAnza Boulevard
                                                 Cupertino, California 95014

         The Optionee represents that the Optionee is familiar with the terms
and provisions of this Option Agreement, including the Unvested Share Repurchase
Option set forth in Section 11 and the Right of First Refusal set forth in
Section 12, and hereby accepts the Option subject to all of the terms and
provisions thereof. The Optionee hereby agrees to accept as binding, conclusive
and final all decisions or interpretations of the Board upon any questions
arising under this Option Agreement. The undersigned acknowledges receipt of a
copy of the Plan.

                                       OPTIONEE

Date:
     ---------------------------       -----------------------------------------

                                       Optionee Address:

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

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

                                       16
<PAGE>   17
                                             Optionee: ________________________

                                             Date: ____________________________

                             IMMEDIATELY EXERCISABLE
                            NONSTATUTORY STOCK OPTION
                                 EXERCISE NOTICE

Telocity, Inc.
Attention: Contracts Manager
10355 North DeAnza Boulevard
Cupertino, California 95014

Ladies and Gentlemen:

         1. Exercise of Option. I was granted a nonstatutory stock option (the
"OPTION") to purchase shares of the common stock of Telocity, Inc. (the
"COMPANY") pursuant to the Company's 1998 Stock Option Plan (the "PLAN") and my
Immediately Exercisable Nonstatutory Stock Option Agreement dated
__________________, 19___ (the "OPTION AGREEMENT"). I hereby elect to exercise
the Option as to a total of __________________ shares of the common stock of the
Company (the "SHARES"), of which ________________ are Vested Shares and
______________ are Unvested Shares as determined in accordance with the Option
Agreement.

         2. Payments. Enclosed herewith is full payment in the aggregate amount
of $_____________ (representing $_______ per share) for the Shares in the manner
set forth in the Option Agreement. I authorize payroll withholding and otherwise
will make adequate provision for foreign, federal, state and local tax
withholding obligations of the Company, if any.

         3. Binding Effect. I agree that the Shares are being acquired in
accordance with and subject to the terms, provisions and conditions of the
Option Agreement, including the Unvested Share Repurchase Option and the Right
of First Refusal set forth therein, to all of which I hereby expressly assent.
This Agreement shall inure to the benefit of and be binding upon the my heirs,
executors, administrators, successors and assigns. I agree to deposit the
certificate or certificates evidencing the Shares, along with a blank stock
assignment separate from certificate executed by me, with an escrow agent
designated by the Company, to be held by such escrow agent pursuant to the
Company's standard Joint Escrow Instructions, an executed copy of which I have
delivered herewith.

         4. Transfer. I am aware that Rule 144, promulgated under the Securities
Act, which permits limited public resale of securities acquired in a nonpublic
offering, is not currently available with respect to the Shares and, in any
event, is available only if certain conditions are satisfied. I understand that
any sale of the Shares that might be made in reliance upon Rule 144 may only be
made in limited amounts in accordance with the terms and conditions of such rule
and that a copy of Rule 144 will be delivered to me upon request.

                                       1
<PAGE>   18
         My address is:_________________________________________________________

                       _________________________________________________________

         My Social Security Number is:__________________________________________

         5. Election Under Section 83(b) of the Code. I understand and
acknowledge that if I am exercising the Option to purchase Unvested Shares
(i.e., shares that remain subject to the Company's Unvested Share Repurchase
Option), that I should consult with my tax advisor regarding the advisability of
filing with the Internal Revenue Service an election under Section 83(b) of the
Code, which must be filed no later than thirty (30) days after the date on which
I exercise the Option. I acknowledge that I have been advised to consult with a
tax advisor prior to the exercise of the Option regarding the tax consequences
to me of exercising the Option. AN ELECTION UNDER SECTION 83(b) MUST BE FILED
WITHIN 30 DAYS AFTER THE DATE ON WHICH I PURCHASE SHARES. THIS TIME PERIOD
CANNOT BE EXTENDED. I ACKNOWLEDGE THAT TIMELY FILING OF A SECTION 83(b) ELECTION
IS MY SOLE RESPONSIBILITY, EVEN IF I REQUEST THE COMPANY OR ITS REPRESENTATIVES
TO FILE SUCH ELECTION ON MY BEHALF.

         I understand that I am purchasing the Shares pursuant to the terms of
the Plan and my Option Agreement, copies of which I have received and carefully
read and understand.

                                       Very truly yours,

                                       _________________________________________

Receipt of the above is hereby acknowledged.

TELOCITY, INC.

By:__________________________________

Title:_______________________________

Dated:_______________________________

                                       2
<PAGE>   19
                                                               November 17, 1999

                             [Telocity Letterhead]

Telocity Optionee
c/o Telocity, Inc.
10355 North DeAnza Boulevard
Cupertino, CA 95014

         RE:      SECTION 83(b) ELECTION UPON EXERCISE OF NONSTATUTORY STOCK
                  OPTION FOR UNVESTED SHARES

Dear Optionee:

         If you elect to exercise your nonstatutory stock option to purchase
unvested shares of the company's stock that will vest over time, the income tax
consequences of your option exercise are quite complex, and we strongly urge you
to consult with a tax advisor knowledgeable regarding your financial
circumstances and nonstatutory stock options. Telocity Inc. cannot advise you
regarding tax matters.

         As described in the attached memorandum prepared by our legal counsel,
you may derive significant tax benefits by filing with the Internal Revenue
Service an election under Section 83(b) of the Internal Revenue Code (a "Section
83(b) Election). However, if you wish to make a Section 83(b) Election, it must
be filed with the IRS within 30 days of the date on which you exercised your
option. SINCE THE DUE DATE IS THIRTY DAYS FROM THE EXERCISE DATE, IF YOU
EXERCISE YOUR OPTIONS, YOUR PROMPT ATTENTION TO THIS MATTER IS REQUIRED.

         Please review the attached memorandum. If you decide to file a Section
83(b) Election, a form of Section 83(b) Election is enclosed for your
convenience. However, the timely filing of a Section 83(b) Election is solely
your responsibility. Please follow the filing instructions contained in the
memorandum.

         We strongly recommend that you consult with your personal tax or
financial advisor to determine whether filing a Section 83(b) Election is
appropriate for you.

                                       Very truly yours,

                                       TELOCITY, INC.

                                       By: /s/ MICHAEL GALLO
                                           ----------------------------------

Enclosures

<PAGE>   20
                          GRAY CARY WARE & FREIDENRICH

                                   MEMORANDUM

TO:               Optionees under the Telocity, Inc. 1998 Stock Option Plan
FROM:             Gray Cary Ware & Freidenrich
DATE:             September 1, 1998
RE:               Election Under Section 83(b) of the Internal Revenue Code Upon
                  Exercise of Nonstatutory Stock Option to Purchase Unvested
                  Shares
--------------------------------------------------------------------------------

         As counsel to Telocity, Inc. (the "Company"), we have been asked to
prepare this memorandum to alert optionees exercising a nonstatutory stock
option to purchase shares subject to the Unvested Share Repurchase Option of the
potential application of an election under Section 83(b) (a "Section 83(b)
Election") of the Internal Revenue Code of 1986 and a similar section of the
California Revenue and Taxation Code (collectively referred to as "Section 83").
AN OPTIONEE WHO WISHES TO MAKE A SECTION 83(b) ELECTION MUST MAKE SUCH ELECTION
WITHIN THIRTY (30) DAYS OF THE DATE ON WHICH THE UNVESTED SHARES WERE ACQUIRED.
ACCORDINGLY, PROMPT ATTENTION TO THIS MATTER IS REQUIRED.

         This information is intended to be a general summary of the issues
involved for federal income tax purposes as of the date set forth above. An
optionee's particular circumstances may result in consequences different from
those described. In addition, the application of state, local, and foreign tax
consequences is beyond the scope of this memorandum. Optionees are advised,
therefore, to consult their own tax advisor regarding the tax consequences to
the optionee of the exercise of an incentive stock option and subsequent sale of
the stock.

         An optionee who elects to exercise his or her nonstatutory stock option
to acquire unvested shares ("Unvested Shares") is subject to the Company's
Unvested Share Repurchase Option (the "Repurchase Right") set forth in the
option agreement. The Repurchase Right grants the Company the right to reacquire
at the optionee's original exercise price any shares remaining unvested on the
optionee's termination of employment. By filing a Section 83(b) Election with
the Internal Revenue Service (the "IRS") within thirty (30) days of the
acquisition of the Unvested Shares, the optionee may change the amount of
ordinary income recognized and the characterization of any gain recognized on a
subsequent sale of the Unvested Share.

         1. Section 83 and Treatment of Nonstatutory Stock Option. If an
optionee exercises a nonstatutory stock option to purchase stock of his employer
that is subject to a Repurchase Right, the excess, if any, of the fair market
value of the stock on the date or dates the Repurchase

                                       1
<PAGE>   21
Right lapses over the amount paid for such stock is includable in the gross
income of the optionee in the year such Repurchase Right lapses.

         To avoid the potential characterization of post-exercise appreciation
as ordinary income and to defer the payment of tax on such appreciation until
the stock is sold, the optionee may file an election (a "Section 83(b)
election") with the Internal Revenue Service within 30 days of the option
exercise date. The election details the terms of the transaction, and by making
the election the optionee agrees to report as ordinary income in the year of
purchase the excess, if any, of the fair market value per share of the stock on
the option exercise date (without regard to the Repurchase Right) over the
exercise price paid per share.

         If the exercise occurs when the fair market value is equal to the
exercise price, there will be no difference between the fair market value of the
stock on the option exercise date and the amount paid for such stock. Therefore,
a Section 83(b) election will not cause any immediate recognition of gain.
(However, if the fair market value of the stock increases between the option
grant date and the option exercise date, a Section 83(b) election will result in
such increase being taxable in the year of the purchase. Although the Section
83(b) election states what the employee believes to be the fair market value of
the stock, neither the optionee's nor the Company's determination of the stock's
fair market value is binding on the taxing authorities, who might assert that
the stock had a higher fair market value on the option exercise date than stated
on the Section 83(b) election.) By filing a Section 83(b) election, any gain
recognized by the optionee on the stock attributable to post-exercise
appreciation will be treated as a capital gain and will only be taxed at such
time as the optionee sells the stock.

         2. Section 16(b) of the Securities Exchange Act of 1934. Employees
subject to the provisions of Section 16(b) of the Securities Exchange Act of
1934, as amended, (that is, officers directors and major shareholders of most
public companies), should be aware that the stock acquired on exercise of an
option is deemed subject to a Repurchase Right (whether or not vested) for so
long as the sale of the stock at a profit would subject the employee to suit
under Section 16(b). Such employees may file a Section 83(b) election with
respect to such deemed Repurchase Right. If the shares of stock are both
unvested and subject to a deemed Section 16(b) Repurchase Right, a Section 83(b)
election, if any is filed, will apply to both the vesting restriction and the
Section 16(b) restriction.

         3.       Making the Election.

                  (a) Federal. If you elect to file a Section 83(b) Election,
you must do so within thirty (30) days of the date on which you exercised your
option. If you have purchased Unvested Shares, the Company will provide you with
a form of Section 83(b) Election for your convenience. If you would like to file
a Section 83(b) Election, you should sign the original, fill in your social
security number and address under Item 1, and mail a signed and dated original
and one photocopy of the Section 83(b) Election to the IRS office where you file
your federal income tax return. We recommend that the Section 83(b) Election be
mailed certified mail, return receipt requested and that the letter transmitting
the election request acknowledgment of receipt of the election by signing and
dating or received-stamping the enclosed photocopy of the

                                       2
<PAGE>   22
Section 83(b) Election. A self-addressed stamped envelope must be included for
purposes of returning the acknowledgment copy.

         If you file the Section 83(b) Election, you must send a photocopy of
the election to the Company for its records.

         You should also retain a copy of the Section 83(b) Election in your
files.

         YOU MUST FILE AN ADDITIONAL COPY OF THE SECTION 83(b) ELECTION WITH
YOUR FEDERAL INCOME TAX RETURN FOR THE TAXABLE YEAR IN WHICH THE SHARES WERE
PURCHASED.

                  (b) State. If a proper Section 83(b) Election is filed with
the IRS, such election is deemed to be a proper election for California income
tax purposes as well. A copy of the federal election should be furnished to the
California Franchise Tax Board only upon request.

         Residents of states other than California should consult with their
personal tax or financial advisor to determine the state and local tax
consequences with respect to the purchase of the shares.

         4. Incentive Stock Options. If an optionee purchases stock upon the
exercise of an option which qualifies as an incentive stock option for income
tax purposes, a number of different rules apply. Additional information is
available with respect to such options.

         5. Consultation with Tax Advisors. The tax consequences of nonstatutory
stock options are complex and subject to change. In addition, the circumstances
of a particular employee may result in some variation of the above-described
rules, and the application of state, local, or foreign taxes may affect an
employee's situation. Accordingly, employees are urged to consult with their own
personal tax advisor prior to the exercise of any option and prior to the sale
of any shares of stock acquired in connection with such exercises.

                                       3
<PAGE>   23

                           Section 83(b) Election Form
                        (For Nonstatutory Stock Options)

                           ___________________, 199__

Internal Revenue Service
[IRS Service Center
where Form 1040 is filed]

                  RE:      SECTION 83(b) ELECTION
                           NAME OF OPTIONEE: _________________________
                           SSN: ___________________________

Dear Sir or Madam:

         The following information is submitted pursuant to section 1.83-2 of
the Treasury Regulations in connection with this election by the undersigned
under section 83(b) of the Internal Revenue Code of 1986, as amended (the
"Code").

         1.       The name, address and taxpayer identification number of the
                  taxpayer are:

                           Name:________________________________________________

                           Address: ____________________________________________

                           Soc. Sec. No.:   ____________________________________

         2.       The following is a description of each item of property with
                  respect to which the election is made:

                           ________________ shares of common stock of Telocity,
                           Inc (the "Shares"), purchased from Telocity, Inc.
                           (the "Company") pursuant to a nonstatutory stock
                           option.

         3.       The property was transferred to the undersigned on:

                           ___________________, 199__.

                  The taxable year for which the election is made is:

                           Calendar, 199__.

                                       1
<PAGE>   24
         4.       The nature of the restriction to which the property is
                  subject:

                           The Shares are subject to repurchase by the Company
                           or its assignee upon the occurrence of certain
                           events. This repurchase right lapses with regard to a
                           portion of the Shares based upon the continued
                           performance of services by the taxpayer over time.

         5.       The following is the fair market value at the time of transfer
                  (determined without regard to any restriction other than a
                  restriction which by its terms will never lapse) of each
                  property with respect to which the election is made:

                           $________________ (____________ Shares at $__________
                           per share).

                  The property was transferred to the taxpayer pursuant to the
                  exercise of a nonstatutory stock option.

         6.       The following is the amount paid for the property:

                           $________________ (____________ Shares at $__________
                           per share).

         7.       A copy of this election has been furnished to the Company, the
                  corporation for which the services were performed by the
                  undersigned.

         Please acknowledge receipt of this election by date or
received-stamping the enclosed copy of this letter and returning it to the
undersigned. A self-addressed stamped envelope is provided for your convenience.

                                       Very truly yours,

                                       _________________________________________

Enclosures
cc:  Telocity, Inc

                                       2
<PAGE>   25
                  Sample Transmittal Letter to Internal Revenue Service with
                  83(b) Election

                                     [Name]
                                    [Address]
                                    [Address]

                                            _____________________, 19__

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

[IRS Service Center
where Form 1040 Filed]

         Re:      Section 83(b) Election
                  Name of Taxpayer:  _______________________________
                  SSN:  ____________________________

Dear Sir or Madam:

         Enclosed please find an original and one copy of an election under
section 83(b) of the Internal Revenue Code of 1986, as amended.

         Please acknowledge receipt of the enclosed by date- or receive-stamping
the enclosed copy of the election and returning it to the undersigned. A
self-addressed stamped envelope is enclosed for your convenience.

                                       Very truly yours,

                                       _________________________________________
                                       [Signature]

Enclosures

<PAGE>   26
                  Acknowledgment of Receipt of 83(b) Materials

                            ACKNOWLEDGMENT OF RECEIPT
                           OF SECTION 83(b) MATERIALS

         The undersigned optionee ("Optionee") hereby acknowledges receipt of a
form for making an election pursuant to section 83(b) of the Internal Revenue
Code of 1986, as amended, and a memorandum regarding such election in connection
with the Optionee's exercise of an immediately exercisable stock option under
the Telocity, Inc. 1998 Stock Option Plan.

Dated: ________________________        ____________________________________
                                       Signature

                                       ____________________________________
                                       Name printed

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