Document:

Prepared by R.R. Donnelley Financial -- AMENDED & RESTATED 2000 STOCK OPTION PLAN

 Exhibit 10.49 
  
 EDGEWATER
TECHNOLOGY, INC. 
  
 AMENDED AND RESTATED 2000 STOCK OPTION PLAN 
  
 SECTION 1. PURPOSE.    The Plan (i) authorizes the Committee to provide to Employees and Consultants of the Corporation and its Subsidiaries, who are in a position to
contribute materially to the long-term success of the Corporation, with grants of options to acquire common stock, par value $.01 per share, of the Corporation, and (ii) provides for the automatic grant of options to Non-Employee Directors of the
Corporation, in accordance with the terms specified herein. The Corporation believes that this incentive program will cause those persons to increase their interest in the Corporation’s welfare, and aid in attracting and retaining Employees,
Consultants and Directors of outstanding ability. 
  
 SECTION 2. DEFINITIONS.    Unless the context clearly
indicates otherwise, the following terms, when used in this Plan, shall have the meanings set forth in this Section: 
  
 (a) “Board” shall mean the Board of Directors of the Corporation. 
  
 (b) “Cause”
shall mean, except to the extent specified otherwise by the Committee, a finding of the Committee that the Grantee (i) has breached his or her employment or service contract with the Corporation or its Subsidiaries, (ii) has engaged in disloyalty to
the Corporation or its Subsidiaries, including, without limitation, fraud, embezzlement, theft, commission of a felony or proven dishonesty in the course of his or her employment or service, (iii) has disclosed trade secrets or confidential
information of the Corporation or its Subsidiaries to persons not entitled to receive such information, (iv) has breached any noncompetition or nonsolicitation agreement between the Corporation or its Subsidiaries and the Grantee, or (v) has engaged
in such other behavior detrimental to the interests of the Corporation or its Subsidiaries as the Committee determines. 
  
 (c) A “Change in Control” shall be deemed to have occurred if: 
  
 (i)
any person, other than the Corporation or an employee benefit plan of the Corporation, acquires, directly or indirectly, the beneficial ownership of any voting security of the Corporation and immediately after such acquisition such person is,
directly or indirectly, the beneficial owner of voting securities representing 50% or more of the total voting power of the then-outstanding voting securities of the Corporation; 
  
 (ii) the individuals (A) who, as of the adoption of this Plan, constitute the Board (the “Original Directors”) or (B) who thereafter are elected to the Board
and whose election, or nomination for election, to the Board was approved by a vote of at least two-thirds (2/3) of the Original Directors then still in office (such directors becoming “Additional Original Directors” immediately following
their election) or (C) who are elected to the Board and whose election, or nomination for election, to the Board was approved by a vote of at least two-thirds (2/3) of the Original Directors and Additional Original Directors then still in office
(such directors also becoming “Additional Original Directors” immediately following their election), cease for any reason to constitute a majority of the members of the Board; 
  
 (iii) the stockholders of the Corporation shall approve a merger, consolidation, recapitalization, or reorganization of the Corporation, a reverse stock split of
outstanding voting securities, or consummation of any such transaction if stockholder approval is not sought or obtained, other than any such transaction which would result in at least 75% of the total voting power represented by the voting
securities of the surviving entity outstanding immediately after such transaction being beneficially owned by at least 75% of the holders of outstanding voting securities of the Corporation immediately
 
 

 
prior to the transaction, with the voting power of each such continuing holder relative to other such continuing holders not substantially altered in the transaction; or 
  
 (iv) the stockholders of the Corporation shall approve a plan of complete liquidation of the Corporation or an agreement for the sale
or disposition by the Corporation of all or a substantial portion of the Corporation’s assets (i.e. 50% or more of the total assets of the Corporation). 
  
 (d) “Code” shall mean the Internal Revenue Code of 1986, as it may be amended from time to time. 
  
 (e) “Committee” shall mean the Board, or any committee of two or more Directors that may be designated by the Board to administer the Plan. The Committee may
be comprised of “non-employee directors” within the meaning of Rule 16b-3 under the Exchange Act. 
  
 (f) “Consultant” shall mean (i) any person who is engaged to perform bona fide services for the Corporation or its Subsidiaries, other than as an Employee or Director, where the services are not in connection with the offer and
sale of securities in a capital-raising transaction and the consultant does not directly or indirectly promote or maintain a market for the Corporation’s securities, or (ii) any person who has agreed to become a consultant within the meaning of
clause (i). 
  
 (g) “Corporation” shall mean Edgewater Technology, Inc., a Delaware corporation.

  
 (h) “Director” shall mean any member of the Board. 
  
 (i) “Employee” shall mean (i) any employee of the Corporation or its Subsidiaries (including Directors who are otherwise
employed by the Corporation or its Subsidiaries), or (ii) any person who has agreed to become an employee within the meaning of clause (i). 
  
 (j) “Exchange Act” shall mean the Securities Exchange Act of 1934 as it may be amended from time to time. 
  
 (k) “Fair Market Value” of the Stock on a given date shall be based upon: (i) if the Stock is listed on a national securities exchange or quoted in an
interdealer quotation system, the last sales price or, if unavailable, the average of the closing bid and asked prices per share of the Stock on such date (or, if there was no trading or quotation in the Stock on such date, on the next preceding
date on which there was trading or quotation) as provided by one of such organizations; or (ii) if the Stock is not listed on a national securities exchange or quoted in an interdealer quotation system, as determined by the Committee in good faith
in its sole discretion. 
  
 (l) “Grant” shall mean a grant of an Option. 
  
 (m) “Grantee” shall mean a person granted an Option under the Plan. 
  

(n) “1933 Act” shall mean the Securities Act of 1933, as amended. 
  
 (o) “Non-Employee Director” shall mean a Director of the Corporation who is not an Employee, and who was not an Employee at any time during the prior one year
period. 
  
 (p) “Officer” shall mean an officer of the Corporation with the meaning of Rule 16a-(1)(f)
under the Exchange Act. 
  
 (q) “Option” shall mean an option granted pursuant to Sections 6 and 7 of
the Plan to purchase shares of Stock that is not an incentive stock option as described in Code Section 422. 
  
 (r) “Plan” shall mean this Edgewater Technology, Inc. Amended and Restated 2000 Stock Option Plan as set forth herein and as amended from time to time. 
  
 (s) “Stock” shall mean shares of the common stock par value $.01 per share of the Corporation. 
  
 (t) “Stock Option Agreement” shall mean a written agreement between the Corporation and the Grantee, or a certificate accepted by the Grantee, evidencing the
grant of an Option hereunder and containing such terms and conditions, not inconsistent with the Plan, as the Committee shall approve. 
 

  
 (u) “Subsidiary” shall mean (i) any company (whether a corporation,
partnership, joint venture or other entity) in which the Corporation owns, directly or indirectly, a majority of the shares of capital stock or other equity interest, or (ii) any entity which the Committee reasonably expects to become a subsidiary
within the meaning of clause (i). 
  
 SECTION 3. SHARES OF STOCK SUBJECT TO THE PLAN. 
  
 (a) Subject to adjustment as described in Section 10, the total amount of Stock that may be subject to Grants, determined immediately
after the grant, shall not exceed four million (4,000,000) shares of Stock. 
  
 (b) All Employees and
Non-Employee Directors (subject as to Non-Employee Directors to the limitations in Section 7) are eligible to receive Grants under the Plan. Notwithstanding the foregoing: (i) the aggregate number of Grants under the Plan to Officers and Directors
shall be less than fifty percent (50%) of the total number of Grants to all persons under the Plan; and (ii) the aggregate of number of shares of Stock underlying Grants to Officers and Directors under the Plan shall be less than fifty percent (50%)
of the total number of shares of Stock underlying Grants to all persons under the Plan, as determined in each of (i) and (ii) from the date of the amendment and restatement of the Plan to extend eligibility to Officers and Directors to the date of
the third anniversary of such amendment and restatement (and to the date of each anniversary thereafter); provided, however, that there shall be excluded from the numerator and denominator of such calculations, (A) with respect to the
item (i) test above, the number of Grants to Officers not previously employed by the Corporation pursuant to a Grant of Options as an inducement essential to such individuals entering into employment contracts with the Corporation; and (B) with
respect to the item (ii) test above, Grants of Options for shares of Stock issued to Officers not previously employed by the Corporation pursuant to a Grant of Options as an inducement essential to such individuals entering into employment contracts
with the Corporation. 
  
 (c) For purposes of the foregoing limits, shares subject to Grants shall not be deemed
delivered if such grants are forfeited, expire or otherwise terminate without delivery of shares to the Grantee. Any shares of Stock delivered pursuant to a Grant may consist, in whole or in part, of authorized and unissued shares or treasury
shares. 
  
 SECTION 4. ADMINISTRATION OF THE PLAN.    The Plan shall be administered by the Committee. Subject
to the express provisions of the Plan, the Committee shall have the authority to interpret the Plan, to prescribe, amend and rescind rules and regulations relating to the Plan, to determine the terms and provisions of Stock Option Agreements
thereunder and to make all other determinations necessary or advisable for the administration of the Plan. Any controversy or claim arising out of or related to this Plan or the grants thereunder shall be determined unilaterally by, and at the sole
discretion of, the Committee. Any action of the Committee with respect to the Plan shall be final, conclusive, and binding on all persons, including the Corporation, Subsidiaries of the Corporation, Grantees and any person claiming any rights under
the Plan from or through any Grantee and stockholders. The express grant of any specific power to the Committee, and the taking of any action by the Committee, shall not be construed as limiting any power or authority of the Committee. The Committee
may delegate to officers or managers of the Corporation or any Subsidiary the authority, subject to such terms as the Committee shall determine, to perform administrative functions to the extent permitted under Rule 16b-3, if applicable, and other
applicable law. 
  
 SECTION 5. TYPES OF OPTIONS.    Options granted under the Plan shall be options to purchase
shares of the Stock that are not incentive stock options as described in Code Section 422. 
  
 SECTION 6. GRANT OF OPTIONS TO
EMPLOYEES AND CONSULTANTS. 
  
 (a) Employees and Consultants of the Corporation and its Subsidiaries shall be
eligible to receive Options under the Plan. 
 

  
 (b) The exercise price per share of Stock subject to an Option shall be
determined by the Committee and specified in the Stock Option Agreement. The exercise price may be equal to, greater than, or less than the Fair Market Value of a share of Stock on the date the Option is granted. 
  
 (c) The term of each Option granted to an Employee or Consultant shall be determined by the Committee and specified in a Stock Option
Agreement, provided that no Option shall be exercisable more than ten years from the date such Option is granted. 
  
 (d) The Committee shall determine and designate from time to time Employees or Consultants who are to be granted Options, and shall specify in the Stock Option Agreement the nature of each Option granted and the number of shares of Stock
subject to each such Option. 
  
 (e) The Committee shall determine whether any Option granted to an Employee or
Consultant shall become exercisable in one or more installments and specify the installment dates in the Stock Option Agreement. The Committee may also specify in the Stock Option Agreement such other provisions, not inconsistent with the terms of
this Plan, as it may deem desirable. The Committee shall determine the extent to which Options shall become exercisable upon a Change in Control, unless otherwise specified in the Stock Option Agreement. 
  
 (f) The Committee may, at any time, grant new or additional Options to any eligible Employee or Consultant who has previously received
Options under this Plan, or options under other plans, whether such prior Options or other options are still outstanding, have been exercised previously in whole or in part, or have been canceled. The exercise price of such new or additional Options
may be established by the Committee without regard to such previously granted Options or other options. 
  
 (g)
The Committee may provide that Options granted to persons who may be non-exempt employees under the Fair Labor Standards Act of 1938, as amended, shall have an exercise price not less than 85% of the Fair Market Value of the Stock on the date of
grant, and may not be exercisable for at least six months after the date of grant (except that such Options may become exercisable, as determined by the Committee, upon the Grantee’s death, disability or retirement, or upon a Change in Control
or other circumstances permitted by applicable regulations). 
  
 SECTION 7. GRANTS OF OPTIONS TO NON-EMPLOYEE DIRECTORS.

  
 (a) Non-Employee Directors of the Corporation shall be eligible to receive Options under the Plan only
pursuant to the provisions of this Section 7. Each Non-Employee Director shall receive upon his or her first election to the Board, without the exercise of the discretion of any person, an Option under the Plan relating to the purchase of 20,000
shares of Stock (an “Initial Grant”). On the day of each annual meeting of stockholders, each person who is a continuing Non-Employee Director (excluding any newly-elected Non-Employee Director entitled to receive an Initial Grant) shall
receive, without the exercise of the discretion of any person, an Option under the Plan relating to the purchase of 5,000 shares of Stock. In the event that there are not sufficient shares available under this Plan to allow for the grant to each
Non-Employee Director of an Option for the number of shares provided herein, each Non-Employee Director shall receive an Option for his pro rata share of the total number of shares of Stock available under the Plan. 
  
 (b) The exercise price of each share of Stock subject to an Option granted to a Non-Employee Director shall equal the Fair Market
Value of a share of Stock on the date such Option is granted. 
  
 (c) Each Option granted to a Non-Employee
Director shall become exercisable in three equal installments on the date of grant and on each of the first two anniversaries of the date of grant, and shall have a term of five years from the date of grant. Notwithstanding the exercise period of
any Option granted to a Non-Employee Director, all such Options shall immediately become exercisable upon a Change in Control. 
 

  
 (d) This Section 7 shall be effective after the earlier of: (i) May 1, 2002,
or (ii) the date the Corporation receives notification from The Nasdaq Stock Market, Inc. that amendments to the Plan to provide option grants to Non-Employee Directors do not require the approval of the stockholders of the Corporation.

  
 SECTION 8. EXERCISE OF OPTIONS. 
  
 (a) Unless otherwise determined by the Committee, in the event that a Grantee is a “covered employee” as described in Code Section 162(m)(3), an Option shall
not be exercisable by such Grantee in any taxable year to the extent that the exercise of such Option would cause the Grantee’s total compensation to exceed the limits for deductible compensation under Code Section 162(m) for the taxable year.
However, in no event may the Grantee be prohibited from exercising the Option by reason of this Section 8(a) later than nine years from the date such Option is granted. 
  
 (b) Except as provided pursuant to Section 9, no Option shall be exercised unless at the time of such exercise the Grantee is then: (A) an Employee (determined with
reference to Section 2(i)(i) only); or (B) a Consultant (determined with reference to Section 2(f)(i) only) of the Corporation or a Subsidiary (determined with reference to Section 2(u)(i) only). 
  

(c) Except as provided in Section 9, no Option granted to a Non-Employee Director shall be exercised unless at the time of such exercise the Grantee is then a
Non-Employee Director. 
  
 (d) A Grantee or other permitted holder shall exercise an Option by delivery of
written notice to the Corporation setting forth the number of shares with respect to which the Option is to be exercised, together with cash, certified check, bank draft, wire transfer, or postal or express money order payable to the order of the
Corporation for an amount equal to the Option price of such shares and any income tax which may be required to be withheld as determined by the Committee pursuant to Section 12. The Committee may, in its sole discretion, permit a Grantee to pay all
or a portion of the exercise price by delivery of Stock held by the Grantee longer than six months or other property (including notes or other contractual obligations of Grantees to make payment on a deferred basis to the extent permitted by
applicable law), or payment through a broker in accordance with procedures permitted by Regulation T of the Federal Reserve Board. 
  
 (e) Notwithstanding the foregoing, an Option shall become exercisable in accordance with such terms and conditions as may be determined by the Committee and specified in the Stock Option Agreement. 

 
 SECTION 9. EXERCISE OF OPTIONS UPON TERMINATION. 
  
 (a) Unless otherwise determined by the Committee, upon termination of a Grantee’s employment with the Corporation and its Subsidiaries for any reason other than
Cause, death, disability or retirement, such Grantee may exercise any Options during the three-month period following such termination of employment, but only to the extent such Option was exercisable immediately prior to such termination of
employment. 
  
 (b) Unless otherwise determined by the Committee, upon termination of a Grantee’s employment
with the Corporation and its Subsidiaries on account of death or disability, such Grantee may exercise any Option during the one year period following such termination of employment, but only to the extent such Option was exercisable immediately
prior to such termination of employment. 
  
 (c) Unless otherwise determined by the Committee, upon termination
of a Grantee’s employment with the Corporation and its Subsidiaries on account of retirement after attainment of age 65, such Grantee may exercise any Option in accordance with the original Option term following such termination of employment,
but only to the extent such Option was exercisable immediately prior to such termination of employment. 
  
 (d)
If the Committee determines that such termination is for Cause, all Options held by the Grantee shall immediately terminate. In addition, all Options granted on the basis of clause (ii) of Section 2(f), Section 2(i) or Section 2(u) shall immediately
terminate if the Committee determines, in its sole discretion, that the Consultant, Employee, or Subsidiary, as the case may be, will not become a Consultant, Employee or Subsidiary within the meaning of clause (i) of such Sections. 

  
 (e) Unless otherwise determined by the Committee and specified in the Stock
Option Agreement, in no event shall any Option be exercisable for more than the maximum number of shares that the Grantee was entitled to purchase at the date of termination of the relationship with the Corporation and its Subsidiaries. In no event
shall any Option be exercisable later than the date of expiration of the Option term. 
  
 (f) Subject to the
provisions of Section 6(e), the sale of any Subsidiary shall be treated as a termination of employment with respect to any Grantee employed by such Subsidiary. 
  
 (g) Subject to the foregoing, in the event of death, Options may be exercised by a Grantee’s legal representative. Options transferred pursuant to Section 14 may
also be exercised by a permitted holder. 
  
 SECTION 10. ADJUSTMENT UPON CHANGES IN CAPITALIZATION.    In the
event any dividend or other distribution (whether in the form of cash, Stock, or other property), recapitalization, forward or reverse split, reorganization, merger, consolidation, spin-off, combination, repurchase, or share exchange, or other
similar corporate transaction or event affects the Stock such that an adjustment is appropriate in order to prevent dilution or enlargement of the rights of Grantees under the Plan, then the Committee shall, in such manner as it may deem equitable,
adjust any or all of (i) the number and kind of shares of Stock deemed to be available thereafter for Grants, (ii) the number and kind of shares of Stock that may be delivered or deliverable in respect of outstanding Grants, and (iii) the exercise
price. If deemed appropriate, the Committee may make provision for a cash payment with respect to any conditions of, and the criteria included in, Grants (including, without limitation, cash payments in exchange for Grants or substitution of Grants
using stock of a successor or other entity) in recognition of unusual or nonrecurring events (including, without limitation, events described in the preceding sentence) affecting the Corporation or any Subsidiary or the financial statements of the
Corporation or any Subsidiary, or in response to changes in applicable laws, regulations, or accounting principles. 
  
 SECTION 11.
RESTRICTIONS ON ISSUING SHARES.    The Corporation shall not be obligated to deliver Stock upon the exercise or settlement of any Grant or take other actions under the Plan until the Corporation shall have determined that
applicable federal and state laws, rules, and regulations have been complied with and such approvals of any regulatory or governmental agency have been obtained and contractual obligations to which the Grant may be subject have been satisfied. The
Corporation, in its discretion, may postpone the issuance or delivery of Stock under any Grant until completion of such stock exchange listing or registration or qualification of such Stock or other required action under any federal or state law,
rule, or regulation as the Corporation may consider appropriate, and may require any Grantee to make such representations and furnish such information as it may consider appropriate in connection with the issuance or delivery of Stock under the
Plan. 
  
 SECTION 12. TAX WITHHOLDING.    To the extent required by applicable federal, state, local or foreign
law, a Grantee shall make arrangements satisfactory to the Corporation for the satisfaction of any withholding tax obligations that arise by reason of an Option exercise or any sale of shares. The Corporation shall not be required to issue shares
until such obligations are satisfied. The Committee may permit these obligations to be satisfied by having the Corporation withhold the minimum applicable amounts from a portion of the shares of the Stock that otherwise would be issued to the
Grantee, or to the extent permitted, by tendering shares previously acquired. 
  
 SECTION 13. DEFERRAL OF RECEIPT OF
STOCK.    Effective upon the amendment of the Corporation’s deferred compensation plan to expressly permit deferrals under this Section 13, a Grantee may, pursuant to the terms of such plan, as amended, defer receipt of
Stock that would otherwise be delivered to such Grantee upon the exercise or settlement of any Option. 
  
 SECTION 14.
TRANSFERABILITY. 
  
 (a) Except as provided below, no Grant shall be subject to anticipation, sale, assignment,
pledge, encumbrance, charge or transfer except by will or the laws of descent and distribution, and an Option shall be exercisable during the Grantee’s lifetime only by the Grantee. 
 

  
 (b) Notwithstanding the foregoing, the Committee may provide, in a Stock
Option Agreement, that the Grantee may transfer Options to family members or other persons or entities according to such terms as the Committee may determine; provided that the Grantee receives no consideration for the transfer of the Option and the
transferred Option shall continue to be subject to the same terms and conditions as were applicable to the Option immediately before the transfer. 
  
 SECTION 15. NON-COMPETITION.    If the Grantee breaches any non-competition agreement in effect with the Corporation or its Subsidiaries, all of the Grantee’s outstanding Grants shall
immediately terminate, and the Corporation may require that the Grantee pay to the Corporation or its Subsidiaries (in Stock or cash) an amount equal to any gain arising from the exercise of Options during the forfeiture period. The forfeiture
period is the period beginning on the date that is six months before the Grantee’s termination of employment or service with the Corporation and its Subsidiaries and ending upon the termination of such non-competition agreement. The gain to be
reimbursed is the amount by which the Fair Market Value of the Stock on the date of the Committee’s determination (or the date of any earlier sale or other disposition of the Stock covered by the Option, if greater) exceeds the exercise price
of the Option. 
  
 SECTION 16. GENERAL PROVISIONS. 
  
 (a) Each Grant shall be evidenced by a Grant instrument. The terms and provisions of such instruments may vary among Grantees and among different Grants granted to the
same Grantee. 
  
 (b) A Grant in any year shall not give the Grantee any right to similar grants in future years,
any right to continue such Grantee’s employment relationship with the Corporation or its Subsidiaries, or, until such unrestricted share certificates are issued, any rights as a stockholder of the Corporation. All Grantees shall remain subject
to discharge to the same extent as if the Plan were not in effect. 
  
 (c) No Grantee, and no beneficiary or
other persons claiming under or through the Grantee shall have any right, title or interest by reason of any Grant to any particular assets of the Corporation or its Subsidiaries, or any shares of Stock allocated or reserved for the purposes of the
Plan or subject to any Grant except as set forth herein. The Corporation shall not be required to establish any fund or make any other segregation of assets to assure the payment of any Grant. 
  

(d) The issuance of shares of Stock to Grantees, their legal representatives or other permitted holders shall be subject to any applicable taxes and other laws or
regulations of the United States or of any state having jurisdiction thereof. 
  
 SECTION 17. AMENDMENT OR
TERMINATION.    The Board may, at any time, alter, amend, suspend, discontinue or terminate this Plan; provided, however, that no such action shall materially impair the rights of Grantees to Grants previously granted hereunder
and, provided further, however, that any shareholder approval necessary or desirable in order to comply with other applicable law or regulation shall be obtained in the manner required therein. The Committee may waive any conditions or rights under,
or amend, alter, suspend, discontinue, or terminate, any Grant theretofore granted and any Agreement relating thereto; provided, however, that, without the consent of an affected Grantee, no such action may materially impair the rights of such
Grantee under such Grant. Upon termination of the Plan the Committee may (i) require that Grantees surrender their outstanding Options in exchange for a payment by the Corporation, in cash or Stock as determined by the Committee, in an amount equal
to the amount by which the then Fair Market Value of the shares of Stock subject to the Grantee’s unexercised vested Options exceeds the exercise price of such Options or (ii) after giving Grantees an opportunity to exercise their unexercised
vested Options, terminate any or all outstanding Options at such time as the Committee deems appropriate. 
  
 SECTION 18. EFFECTIVE
DATE OF PLAN.    This amended and restated Plan is effective upon the earlier of: (i) the date the Corporation receives notification from The Nasdaq Stock Market, Inc. that amendments to the Plan to provide option grants to
Officers and Non-Employee Directors do not require the approval of the
 
 

 
stockholders of the Corporation, or (ii) its approval by the stockholders of the Corporation. This Plan shall continue in effect until terminated by the Board. 
  
 
 
 This Plan, prior to its amendment and restatement in February 2002, was
originally adopted by the Board on August 31, 2000, which original adoption did not require stockholder approval. This Plan, as amended and restated, was approved by the Board on February 27, 2002, which approval became effective on March 20, 2002,
which was the date of The Nasdaq Stock Market, Inc. Letter. The approval of this Plan by the Board, as amended and restated, did not require stockholder approval.<PAGE>

                                                                    Exhibit 10.3

                                                            [Reflects amendments
                                                      through November 30, 2001]
                               AVICI SYSTEMS INC.

                    AMENDED 2000 EMPLOYEE STOCK PURCHASE PLAN

Article 1 - Purpose.

      This 2000 Employee Stock Purchase Plan (the "Plan") is intended to
encourage stock ownership by all eligible employees of Avici Systems Inc. (the
"Company"), a Delaware corporation, and its participating subsidiaries (as
defined in Article 17) so that they may share in the growth of the Company by
acquiring or increasing their proprietary interest in the Company. The Plan is
designed to encourage eligible employees to remain in the employment of the
Company and its participating subsidiaries. The Plan is intended to constitute
an "employee stock purchase plan" within the meaning of Section 423(b) of the
Internal Revenue Code of 1986, as amended (the "Code").

Article 2 - Administration of the Plan.

      The Plan may be administered by a committee appointed by the Board of
Directors of the Company (the "Committee"). The Committee shall consist of not
less than two members of the Company's Board of Directors. The Board of
Directors may from time to time remove members from, or add members to, the
Committee. Vacancies on the Committee, howsoever caused, shall be filled by the
Board of Directors. The Committee may select one of its members as Chairman, and
shall hold meetings at such times and places as it may determine. Acts by a
majority of the Committee, or acts reduced to or approved in writing by a
majority of the members of the Committee, shall be the valid acts of the
Committee.

      The interpretation and construction by the Committee of any provisions of
the Plan or of any option granted under it shall be final, unless otherwise
determined by the Board of Directors. The Committee may from time to time adopt
such rules and regulations for carrying out the Plan as it may deem best,
provided that any such rules and regulations shall be applied on a uniform basis
to all employees under the Plan. No member of the Board of Directors or the
Committee shall be liable for any action or determination made in good faith
with respect to the Plan or any option granted under it.

      In the event the Board of Directors fails to appoint or refrains from
appointing a Committee, the Board of Directors shall have all power and
authority to administer the Plan. In such event, the word "Committee" wherever
used herein shall be deemed to mean the Board of Directors.

Article 3 - Eligible Employees.

      All employees of the Company or any of its participating subsidiaries
whose customary employment is more than 20 hours per week and for more than five
months in any calendar year and who have completed at least 7 days of employment
shall be eligible to receive options under the Plan to purchase common stock,
par value $0.0001 per share, of the Company (the "Common Stock"), and all
eligible employees shall have the same rights and privileges hereunder. Persons
who are eligible employees on the first business day of the First Offering
Period (as defined in Article 5) shall receive their options as of such day.
Persons who become eligible employees after any date on which options are
granted under the Plan shall be granted options on the first day of the next
succeeding Offering Period (as defined in Article 5) on which options are
granted to eligible employees under the Plan. Persons who remain eligible
employees immediately following completion of any Offering Period in which they
participate shall be

<PAGE>
                                       -2-

granted additional options on the first day of the next succeeding Offering
Period on which options are granted to eligible employees under the Plan; it
being the intention that employees may participate in succeeding (but not
overlapping) Offering Periods. In no event, however, may an employee be granted
an option if such employee, immediately after the option was granted, would be
treated as owning stock possessing five percent or more of the total combined
voting power or value of all classes of stock of the Company or of any parent
corporation or subsidiary corporation, as the terms "parent corporation" and
"subsidiary corporation" are defined in Section 424(e) and (f) of the Code. For
purposes of determining stock ownership under this paragraph, the rules of
Section 424(d) of the Code shall apply, and stock which the employee may
purchase under outstanding options shall be treated as stock owned by the
employee.

Article 4 - Stock Subject to the Plan.

      The stock subject to the options under the Plan shall be shares of the
Company's authorized but unissued Common Stock or shares of Common Stock
reacquired by the Company, including shares purchased in the open market. The
aggregate number of shares which may be issued pursuant to the Plan is 750,000,
subject to adjustment as provided in Article 12, which number shall
automatically increase on January 1 of each year, beginning with January 1,
2001, by such number of shares as is equal to the number of shares necessary to
cause the total number of shares then available to be issued pursuant to the
Plan (after deducting shares issued upon exercise of options under the Plan and
shares issuable pursuant to outstanding options under the plan as of the close
of business on the preceding December 31st) to be 750,000. If any option granted
under the Plan shall expire or terminate for any reason without having been
exercised in full or shall cease for any reason to be exercisable in whole or in
part, the unpurchased shares subject thereto shall again be available under the
Plan.

Article 5 - Offering Periods, Payment Periods and Stock Options.

      Offering Periods during which payroll deductions will be accumulated under
the Plan shall consist of twenty-four month overlapping periods commencing every
six months on June 1st and December 1st of each calendar year (each an "Offering
Period"); provided, however, that the first Offering Period shall commence on
the date on which the Common Stock is first publicly traded (the "Initial Public
Offering") and shall end on the last trading day on or before May 31st 2002 (the
"First Offering Period"). Each Offering Period, with the exception of the First
Offering Period, shall consist of four consecutive six-month Payment Periods
(each a "Payment Period"); provided that the First Offering Period will consist
of four Payment Periods, the first commencing on the Initial Public Offering and
ending on December 31st 2000, the second commencing on January 1st 2001 and
ending on May 31st 2001, the third commencing on June 1st 2001 and ending on
November 30th 2001 and the fourth commencing on December 1st 2001 and ending on
May 31st 2002. The Committee shall have the power to change the duration of
Offering Periods and/or Payment Periods (including the commencement dates
thereof) with respect to future offerings without shareholder approval if such
change is announced at least five days prior to the scheduled beginning of the
first Offering Period to be affected thereafter.

      On the first business day of each Offering Period, the Company will grant
to each eligible employee who is then a participant in the Plan an option to
purchase on the last day of each Payment Period within such Offering Period, at
the Option Price hereinafter provided for, a maximum of 1,000 shares, on
condition that such employee remains eligible to participate in the Plan
throughout the respective Payment Period. The participant shall be entitled to
exercise the option so granted only to the extent of the participant's
accumulated payroll deductions on the last day of the respective Payment Period.
If the participant's accumulated payroll deductions on the last day of the
Payment Period would enable the participant to purchase more than 1,000 shares
except for the 1,000-share limitation, the excess of the amount of the
accumulated payroll deductions over the aggregate purchase price of the 1,000
shares shall

<PAGE>
                                       -3-

be promptly refunded to the participant by the Company, without interest. The
Option Price per share for each Payment Period shall be the lesser of (i) 85% of
the average market price of the Common Stock on the first business day of the
Offering Period and (ii) 85% of the average market price of the Common Stock on
the last business day of the respective Payment Period, in either event rounded
up to avoid fractions of a cent (the "Option Price"). Provided, however, that
with respect to each Payment Period within the First Offering Period, the Option
Price shall be the lesser of (i) 85% of the price per share at which the Common
Stock is initially sold to the public in the Initial Public Offering (without
regard to any applicable discounts or commissions provided to the underwriters)
and (ii) 85% of the average market price of the Common Stock on the last
business day of the respective Payment Period, in either event rounded up to
avoid fractions of a cent. The foregoing limitation on the number of shares
subject to options and the Option Price shall be subject to adjustment as
provided in Article 12.

      For purposes of the Plan, the term "average market price" on any date
means (i) the average (on that date) of the high and low prices of the Common
Stock on the principal national securities exchange on which the Common Stock is
traded, if the Common Stock is then traded on a national securities exchange; or
(ii) the last reported sale price (on that date) of the Common Stock on the
Nasdaq National Market, if the Common Stock is not then traded on a national
securities exchange; or (iii) the average of the closing bid and asked prices
last quoted (on that date) by an established quotation service for
over-the-counter securities, if the Common Stock is not reported on the Nasdaq
National Market. For purposes of determining the last reported sale price or the
last quoted price for the foregoing provision, the last reported or quoted price
shall mean as the case may be, at 4:00 p.m., New York time, on that day.

      For purposes of the Plan, the term "business day" means a day on which
there is trading on the Nasdaq National Market or the aforementioned national
securities exchange, whichever is applicable pursuant to the preceding
paragraph; and if neither is applicable, a day that is not a Saturday, Sunday or
legal holiday in the Commonwealth of Massachusetts.

      No employee shall be granted an option which permits the employee's right
to purchase stock under the Plan, and under all other Section 423(b) employee
stock purchase plans of the Company and any parent or subsidiary corporations,
to accrue at a rate which exceeds $25,000 of fair market value of such stock
(determined on the date or dates that options on such stock were granted) for
each calendar year in which such option is outstanding at any time. The purpose
of the limitation in the preceding sentence is to comply with Section 423(b)(8)
of the Code. If the participant's accumulated payroll deductions on the last day
of the Payment Period would otherwise enable the participant to purchase Common
Stock in excess of the Section 423(b)(8) limitation described in this paragraph,
the excess of the amount of the accumulated payroll deductions over the
aggregate purchase price of the shares actually purchased shall be promptly
refunded to the participant by the Company, without interest.

Article 6 - Exercise of Option.

      Each eligible employee who continues to be a participant in the Plan on
the last day of a Payment Period shall be deemed to have exercised his or her
option on such date and shall be deemed to have purchased from the Company such
number of full shares of Common Stock reserved for the purpose of the Plan as
the participant's accumulated payroll deductions on such date will pay for at
the Option Price, subject to the 1,000-share limit of the option and the Section
423(b)(8) limitation described in Article 5. If the individual is not a
participant on the last day of a Payment Period, then he or she shall not be
entitled to exercise his or her option. Only full shares of Common Stock may be
purchased under the Plan. Unused payroll deductions remaining in a participant's
account at the end of a Payment Period by reason of the inability to purchase a
fractional share shall be carried forward to the next Payment Period.

<PAGE>
                                       -4-

Article 7 - Authorization for Entering the Plan.

      An employee may elect to enter the Plan by filling out, signing and
delivering to the Company an authorization:

            A. Stating the percentage to be deducted regularly from the
      employee's pay;

            B. Authorizing the purchase of stock for the employee in each
      Payment Period in accordance with the terms of the Plan; and

            C. Specifying the exact name or names in which stock purchased for
      the employee is to be issued as provided under Article 11 hereof.

      Such authorization must be received by the Company at least seven days
before the first day of the next succeeding Offering Period and shall take
effect only if the employee is an eligible employee on the first business day of
such Offering Period; provided, however, that the Committee may, in its
discretion, choose to accept an authorization received less than seven days
before the first day of the next succeeding Offering Period.

      Unless a participant files a new authorization or withdraws from the Plan,
the deductions and purchases under the authorization the participant has on file
under the Plan will continue from one Offering Period to the next succeeding
(but not overlapping) Offering Period as long as the Plan remains in effect.
Notwithstanding any of the foregoing, if the average market price of the Common
Stock on the last business day of a respective Payment Period is lower than the
average market price of the Common Stock on the first business day of the
Offering Period, every participant shall be automatically withdrawn from the
Offering Period at the close of such Payment Period and after the acquisition of
shares of Common Stock for such Payment Period, and automatically enrolled in
the immediately following Offering Period as of the first day thereof.

      The Company will accumulate and hold for each participant's account the
amounts deducted from his or her pay. No interest will be paid on these amounts.

Article 8 - Maximum Amount of Payroll Deductions.

      An employee may authorize payroll deductions in an amount (expressed as a
whole percentage) not less than one percent (1%) but not more than ten percent
(10%) (unless otherwise determined by the Committee) of the employee's total
compensation, including base pay or salary and any overtime, bonuses or
commissions paid during the Offering Period during which such authorization
relates.

Article 9 - Change in Payroll Deductions.

      Each participant may increase or decrease the amount of his or her payroll
deduction not more than once during each Payment Period, subject to the
limitations set forth in Article 8, effective on the date of the Company's
written receipt of such election. However, a payroll deduction increase or
decrease will be given effect only if in writing and received by the Company
seven days before the first day of the next succeeding Payment Period. A
participant may withdraw in full from an Offering Period.

Article 10 - Withdrawal from the Plan.

      A participant may withdraw from the Plan (in whole but not in part) at any
time prior to the last day of a Payment Period by delivering a withdrawal notice
to the Company, in which event the Company will

<PAGE>
                                       -5-

refund the entire balance of the employee's deductions not previously used to
purchase stock during such Offering Period.

      To re-enter the Plan, an employee who has previously withdrawn must file a
new authorization at least seven days before the first day of the next Offering
Period in which he or she wishes to participate. The employee's re-entry into
the Plan becomes effective at the beginning of such Offering Period, provided
that he or she is an eligible employee on the first business day of the Offering
Period.

Article 11 - Issuance of Stock.

      Certificates for stock issued to participants shall be delivered as soon
as practicable after each Payment Period by the Company's transfer agent.

      Stock purchased under the Plan shall be issued only in the name of the
participant, or if the participant's authorization so specifies, in the name of
the participant and another person of legal age as joint tenants with rights of
survivorship.

Article 12 - Adjustments.

      Upon the happening of any of the following described events, a
participant's rights under options granted under the Plan shall be adjusted as
hereinafter provided:

            A. In the event that the shares of Common Stock shall be subdivided
      or combined into a greater or smaller number of shares or if, upon a
      reorganization, split-up, liquidation, recapitalization or the like of the
      Company, the shares of Common Stock shall be exchanged for other
      securities of the Company, each participant shall be entitled, subject to
      the conditions herein stated, to purchase such number of shares of Common
      Stock or amount of other securities of the Company as were exchangeable
      for the number of shares of Common Stock that such participant would have
      been entitled to purchase except for such action, and appropriate
      adjustments shall be made in the purchase price per share to reflect such
      subdivision, combination or exchange; and

            B. In the event the Company shall issue any of its shares as a stock
      dividend upon or with respect to the shares of stock of the class which
      shall at the time be subject to options hereunder, each participant upon
      exercising such an option shall be entitled to receive (for the purchase
      price paid upon such exercise) the shares as to which the participant is
      exercising his or her option and, in addition thereto (at no additional
      cost), such number of shares of the class or classes in which such stock
      dividend or dividends were declared or paid, and such amount of cash in
      lieu of fractional shares, as is equal to the number of shares thereof and
      the amount of cash in lieu of fractional shares, respectively, which the
      participant would have received if the participant had been the holder of
      the shares as to which the participant is exercising his or her option at
      all times between the date of the granting of such option and the date of
      its exercise.

      Upon the happening of any of the foregoing events, the class and aggregate
number of shares set forth in Article 4 hereof which are subject to options
which have been or may be granted under the Plan and the limitations set forth
in the second paragraph of Article 5 shall also be appropriately adjusted to
reflect the events specified in paragraphs A and B above. Notwithstanding the
foregoing, any adjustments made pursuant to paragraphs A or B shall be made only
after the Committee, based on advice of counsel for the Company, determines
whether such adjustments would constitute a "modification" (as that term is
defined in Section 424 of the Code). If the Committee determines that such
adjustments would constitute a modification, it may refrain from making such
adjustments.

<PAGE>
                                       -6-

      If the Company is to be consolidated with or acquired by another entity in
a merger, a sale of all or substantially all of the Company's assets or
otherwise (an "Acquisition"), the Committee or the board of directors of any
entity assuming the obligations of the Company hereunder (the "Successor Board")
shall, with respect to options then outstanding under the Plan, either (i) make
appropriate provision for the continuation of such options by arranging for the
substitution on an equitable basis for the shares then subject to such options
either (a) the consideration payable with respect to the outstanding shares of
the Common Stock in connection with the Acquisition, (b) shares of stock of the
successor corporation, or a parent or subsidiary of such corporation, or (c)
such other securities as the Successor Board deems appropriate, the fair market
value of which shall not materially exceed the fair market value of the shares
of Common Stock subject to such options immediately preceding the Acquisition;
or (ii) terminate each participant's options in exchange for a cash payment
equal to the excess of (a) the fair market value on the date of the Acquisition,
of the number of shares of Common Stock that the participant's accumulated
payroll deductions as of the date of the Acquisition could purchase, at an
option price determined with reference only to the first business day of the
applicable Payment Period and subject to the 1,000-share limitation, Code
Section 423(b)(8) and fractional-share limitations on the amount of stock a
participant would be entitled to purchase, over (b) the result of multiplying
such number of shares by such option price.

      The Committee or Successor Board shall determine the adjustments to be
made under this Article 12, and its determination shall be conclusive.

Article 13 - No Transfer or Assignment of Employee's Rights.

      An option granted under the Plan may not be transferred or assigned and
may be exercised only by the participant.

Article 14 - Termination of Employee's Rights.

      Whenever a participant ceases to be an eligible employee because of
retirement, voluntary or involuntary termination, resignation, layoff,
discharge, death or for any other reason, his or her rights under the Plan shall
immediately terminate, and the Company shall promptly refund, without interest,
the entire balance of his or her payroll deduction account under the Plan.
Notwithstanding the foregoing, eligible employment shall be treated as
continuing intact while a participant is on military leave, sick leave or other
bona fide leave of absence, for up to 90 days, or, if longer than 90 days, for
so long as the participant's right to re-employment is guaranteed either by
statute or by contract.

Article 15 - Termination and Amendments to Plan.

      The Plan may be terminated at any time by the Company's Board of Directors
but such termination shall not affect options then outstanding under the Plan.
It will terminate in any case when all or substantially all of the unissued
shares of stock reserved for the purposes of the Plan have been purchased. No
option shall be granted under the Plan after the completion of ten years from
the date on which the Plan was adopted by the Board of Directors, but options
previously granted may extend beyond that date. If at any time shares of stock
reserved for the purpose of the Plan remain available for purchase but not in
sufficient number to satisfy all then unfilled purchase requirements, the
available shares shall be apportioned among participants in proportion to the
amount of payroll deductions accumulated on behalf of each participant that
would otherwise be used to purchase stock, and the Plan shall terminate. Upon
such termination or any other termination of the Plan, all payroll deductions
not used to purchase stock will be refunded, without interest.

<PAGE>
                                       -7-

      The Committee or the Board of Directors may from time to time adopt
amendments to the Plan provided that, without the approval of the stockholders
of the Company, no amendment may (i) increase the number of shares that may be
issued under the Plan; (ii) change the class of employees eligible to receive
options under the Plan, if such action would be treated as the adoption of a new
plan for purposes of Section 423(b) of the Code; or (iii) cause Rule 16b-3 under
the Securities Exchange Act of 1934 to become inapplicable to the Plan.

Article 16 - Limits on Sale of Stock Purchased under the Plan.

      The Plan is intended to provide shares of Common Stock for investment and
not for resale. The Company does not, however, intend to restrict or influence
any employee in the conduct of his or her own affairs. An employee may,
therefore, sell stock purchased under the Plan at any time the employee chooses,
subject to compliance with any applicable federal or state securities laws and
subject to any restrictions imposed under Article 21 to ensure that tax
withholding obligations are satisfied. THE EMPLOYEE ASSUMES THE RISK OF ANY
MARKET FLUCTUATIONS IN THE PRICE OF THE STOCK.

Article 17 - Participating Subsidiaries.

      The term "participating subsidiary" shall mean any present or future
subsidiary of the Company, as that term is defined in Section 424(f) of the
Code, which is designated from time to time by the Board of Directors to
participate in the Plan. The Board of Directors shall have the power to make
such designation before or after the Plan is approved by the stockholders.

Article 18 - Optionees Not Stockholders.

      Neither the granting of an option to an employee nor the deductions from
his or her pay shall constitute such employee as a stockholder of the shares
covered by an option until such shares have been actually purchased by the
employee.

Article 19 - Application of Funds.

      The proceeds received by the Company from the sale of Common Stock
pursuant to options granted under the Plan will be used for general corporate
purposes.

Article 20 - Notice to Company of Disqualifying Disposition.

      By electing to participate in the Plan, each participant agrees to notify
the Company in writing immediately after the participant transfers Common Stock
acquired under the Plan, if such transfer occurs within two years after the
first business day of the Offering Period in which such Common Stock was
purchased or within one year of the date on which such shares were purchased.
Each participant further agrees to provide any information about such a transfer
as may be requested by the Company or any subsidiary corporation in order to
assist it in complying with the tax laws. Such dispositions generally are
treated as "disqualifying dispositions" under Sections 421 and 424 of the Code,
which have certain tax consequences to participants and to the Company and its
participating subsidiaries.

<PAGE>
                                       -8-

Article 21 - Withholding of Additional Income Taxes.

      By electing to participate in the Plan, each participant acknowledges that
the Company and its participating subsidiaries are required to withhold taxes
with respect to the amounts deducted from the participant's compensation and
accumulated for the benefit of the participant under the Plan, and each
participant agrees that the Company and its participating subsidiaries may
deduct additional amounts from the participant's compensation, when amounts are
added to the participant's account, used to purchase Common Stock or refunded,
in order to satisfy such withholding obligations. Each participant further
acknowledges that when Common Stock is purchased under the Plan the Company and
its participating subsidiaries may be required to withhold taxes with respect to
all or a portion of the difference between the fair market value of the Common
Stock purchased and its purchase price, and each participant agrees that such
taxes may be withheld from compensation otherwise payable to such participant.
It is intended that tax withholding will be accomplished in such a manner that
the full amount of payroll deductions elected by the participant under Article 7
will be used to purchase Common Stock. However, if amounts sufficient to satisfy
applicable tax withholding obligations have not been withheld from compensation
otherwise payable to any participant, then, notwithstanding any other provision
of the Plan, the Company may withhold such taxes from the participant's
accumulated payroll deductions and apply the net amount to the purchase of
Common Stock, unless the participant pays to the Company, prior to the exercise
date, an amount sufficient to satisfy such withholding obligations. Each
participant further acknowledges that the Company and its participating
subsidiaries may be required to withhold taxes in connection with the
disposition of stock acquired under the Plan and agrees that the Company or any
participating subsidiary may take whatever action it considers appropriate to
satisfy such withholding requirements, including deducting from compensation
otherwise payable to such participant an amount sufficient to satisfy such
withholding requirements or conditioning any disposition of Common Stock by the
participant upon the payment to the Company or such subsidiary of an amount
sufficient to satisfy such withholding requirements.

Article 22 - Governmental Regulations.

      The Company's obligation to sell and deliver shares of Common Stock under
the Plan is subject to the approval of any governmental authority required in
connection with the authorization, issuance or sale of such shares.

      Government regulations may impose reporting or other obligations on the
Company with respect to the Plan. For example, the Company may be required to
identify shares of Common Stock issued under the Plan on its stock ownership
records and send tax information statements to employees and former employees
who transfer title to such shares.

Article 23 - Governing Law.

      The validity and construction of the Plan shall be governed by the laws of
Delaware, without giving effect to the principles of conflicts of law thereof.

Article 24 - Approval of Board of Directors and Stockholders of the Company.

      The Plan was adopted by the Board of Directors in May, 2000 and was
approved by the stockholders of the Company in July, 2000.

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