Exhibit 10.1

LIFESIZE COMMUNICATIONS, INC.

2003 STOCK OPTION PLAN

(As amended through October 20, 2008)

1. ESTABLISHMENT, PURPOSE AND TERM OF PLAN.

1.1 Establishment. The LifeSize Communications, Inc. 2003 Stock Option Plan (the “Plan”) is hereby established effective as of March 4, 2003.

1.2 Purpose. The purpose of the Plan is to advance the interests of the Participating Company Group and its stockholders by providing an incentive to attract and retain persons performing services for the Participating Company Group and by motivating such persons to contribute to the growth and profitability of the Participating Company Group.

1.3 Term of Plan. The Plan shall continue in effect until the earlier of its termination by the Board or the date on which all of the shares of Stock available for issuance under the Plan have been issued and all restrictions on such shares under the terms of the Plan and the agreements evidencing Awards granted under the Plan have lapsed. However, all Awards shall be granted, if at all, within ten (10) years from the earlier of the date the Plan is adopted by the Board or the date the Plan is duly approved by the stockholders of the Company.

2. DEFINITIONS AND CONSTRUCTION.

2.1 Definitions. Whenever used herein, the following terms shall have their respective meanings set forth below:

(a) “Award” means an Option or Stock Purchase Right granted under the Plan.

(b) “Board” means the Board of Directors of the Company. If one or more Committees have been appointed by the Board to administer the Plan, “Board” also means such Committee(s).

(c) “Cause” shall mean any of the following: (i) the Participant’s theft of Company property or falsification of any Participating Company documents or records; (ii) the Participant’s improper use or disclosure of a Participating Company’s confidential or proprietary information; (iii) any action by the Participant which has a detrimental effect on a Participating Company’s reputation or business; (iv) any material breach by the Participant of any employment agreement between the Participant and the Participating Company Group, which breach is not cured pursuant to the terms of such agreement; or (v) the Participant’s conviction (including any plea of guilty or nolo contendere) of any criminal act which impairs the Participant’s ability to perform his or her duties with the Participating Company Group.

(d) “Code” means the Internal Revenue Code of 1986, as amended, and any applicable regulations promulgated thereunder.

(e) “Committee” means the compensation committee or other committee of the Board duly appointed to administer the Plan and having such powers as shall be specified by the Board. Unless the powers of the Committee have been specifically limited, the Committee shall have all of the powers of the Board granted herein, including, without limitation, the power to amend or terminate the Plan at any time, subject to the terms of the Plan and any applicable limitations imposed by law.

(f) “Company” means LifeSize Communications, Inc., a Delaware corporation, or any successor corporation thereto.

(g) “Consultant” means a person engaged to provide consulting or advisory services (other than as an Employee or a Director) to a Participating Company, provided that the identity of such person, the nature of such services or the entity to which such services are provided would not preclude the Company from offering or selling securities to such person pursuant to the Plan in reliance on either the exemption from registration provided by Rule 701 under the Securities Act or, if the Company is required to file reports pursuant to Section 13 or 15(d) of the Exchange Act, registration on a Form S-8 Registration Statement under the Securities Act.

(h) “Director” means a member of the Board or of the board of directors of any other Participating Company.

(i) “Disability” means the permanent and total disability of the Participant within the meaning of Section 22(e)(3) of the Code.

(j) “Employee” means any person treated as an employee (including an Officer or a Director who is also treated as an employee) in the records of a Participating Company and, with respect to any Incentive Stock Option granted to such person, who is an employee for purposes of Section 422 of the Code; provided, however, that neither service as a Director nor payment of a director’s fee shall be sufficient to constitute employment for purposes of the Plan. The Company shall determine in good faith and in the exercise of its discretion whether an individual has become or has ceased to be an Employee and the effective date of such individual’s employment or termination of employment, as the case may be. For purposes of an individual’s rights, if any, under the Plan as of the time of the Company’s determination, all such determinations by the Company shall be final, binding and conclusive, notwithstanding that the Company or any court of law or governmental agency subsequently makes a contrary determination.

(k) “Exchange Act” means the Securities Exchange Act of 1934, as amended.

(l) “Fair Market Value” means, as of any date, the value of a share of Stock or other property as determined by the Board, in its discretion, or by the Company, in its discretion, if such determination is expressly allocated to the Company herein, subject to the following:

(i) If, on such date, the Stock is listed on a national or regional securities exchange or market system, the Fair Market Value of a share of Stock shall be the closing price of a share of Stock (or the mean of the closing bid and asked prices of a share of Stock if the Stock is so quoted instead) as quoted on the Nasdaq National Market, The Nasdaq SmallCap Market or such other national or regional securities exchange or market system constituting the primary market for the Stock, as reported in The Wall Street Journal or such other source as the Company deems reliable. If the relevant date does not fall on a day on which the Stock has traded on such securities exchange or market system, the date on which the Fair Market Value shall be established shall be the last day on which the Stock was so traded prior to the relevant date, or such other appropriate day as shall be determined by the Board, in its discretion.

(ii) If, on such date, the Stock is not listed on a national or regional securities exchange or market system, the Fair Market Value of a share of Stock shall be as determined by the Board in good faith without regard to any restriction other than a restriction which, by its terms, will never lapse.

(m) “Incentive Stock Option” means an Option intended to be (as set forth in the Option Agreement) and which qualifies as an incentive stock option within the meaning of Section 422(b) of the Code.

(n) “Insider” means an Officer or a Director of the Company or any other person whose transactions in Stock are subject to Section 16 of the Exchange Act.

(o) “Nonstatutory Stock Option” means an Option not intended to be (as set forth in the Option Agreement) or which does not qualify as an Incentive Stock Option.

(p) “Officer” means any person designated by the Board as an Officer of the Company.

(q) “Option” means a right granted under Section 6 to purchase Stock (subject to adjustment as provided in Section 4.2) pursuant to the terms and conditions of the Plan. An Option may be either an Incentive Stock Option or a Nonstatutory Stock Option.

(r) “Option Agreement” means a written agreement between the Company and a Participant setting forth the terms, conditions and restrictions of the Option granted to the Participant and any shares acquired upon the exercise thereof. An Option Agreement may consist of a form of “Notice of Grant of Stock Option” and a form of “Stock Option Agreement” incorporated therein by reference, or such other form or forms as the Board may approve from time to time.

(s) “Parent Corporation” means any present or future “parent corporation” of the Company, as defined in Section 424(e) of the Code.

(t) “Participant” means any eligible person who has been granted one or more Awards.

(u) “Participating Company” means the Company or any Parent Corporation or Subsidiary Corporation.

(v) “Participating Company Group” means, at any point in time, all corporations collectively which are then Participating Companies.

(w) “Rule 16b-3” means Rule 16b-3 under the Exchange Act, as amended from time to time, or any successor rule or regulation.

(x) “Securities Act” means the Securities Act of 1933, as amended.

(y) “Service” means a Participant’s employment or service with the Participating Company Group, whether in the capacity of an Employee, a Director or a Consultant. A Participant’s Service shall not be deemed to have terminated merely because of a change in the capacity in which the Participant renders Service to the Participating Company Group or a change in the Participating Company for which the Participant renders such Service, provided that there is no interruption or termination of the Participant’s Service. Furthermore, a Participant’s Service with the Participating Company Group shall not be deemed to have terminated if the Participant takes any military leave, sick leave, or other bona fide leave of absence approved by the Company; provided, however, that if any such leave exceeds ninety (90) days, on the ninety-first (91st) day of such leave the Participant’s Service shall be deemed to have terminated unless the Participant’s right to return to Service with the Participating Company Group is guaranteed by statute or contract. Notwithstanding the foregoing, unless otherwise designated by the Company or required by law, a leave of absence shall not be treated as Service for purposes of determining vesting under the Participant’s Option Agreement or Stock Purchase Agreement. Except as otherwise provided by the Board, in its discretion, the Participant’s Service shall be deemed to have terminated either upon an actual termination of Service or upon the corporation for which the Participant performs Service ceasing to be a Participating Company. Subject to the foregoing, the Company, in its discretion, shall determine whether the Participant’s Service has terminated and the effective date of and reason for such termination.

(z) “Stock” means the common stock of the Company, as adjusted from time to time in accordance with Section 4.2.

(aa) “Stock Purchase Agreement” means a written agreement between the Company and a Participant setting forth the terms, conditions and restrictions of the Stock Purchase Right granted to the Participant and any shares acquired upon the exercise thereof. A Stock Purchase Agreement may consist of a form of “Notice of Grant of Stock Purchase Right” and a form of “Stock Purchase Agreement” incorporated therein by reference, or such other form or forms as the Board may approve from time to time.

(bb) “Stock Purchase Right” means a right granted under Section 7 to purchase Stock pursuant to the terms and conditions of the Plan.

(cc) “Subsidiary Corporation” means any present or future “subsidiary corporation” of the Company, as defined in Section 424(f) of the Code.

(dd) “Ten Percent Stockholder” means a person who, at the time an Award is granted to such person, owns stock possessing more than ten percent (10%) of the total combined voting power of all classes of stock of a Participating Company within the meaning of Section 422(b)(6) of the Code.

2.2 Construction. Captions and titles contained herein are for convenience only and shall not affect the meaning or interpretation of any provision of the Plan. 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.

3. ADMINISTRATION.

3.1 Administration by the Board. The Plan shall be administered by the Board. All questions of interpretation of the Plan or of any Award shall be determined by the Board, and such determinations shall be final and binding upon all persons having an interest in the Plan or such Award.

3.2 Authority of Officers. Any Officer shall have the authority to act on behalf of the Company with respect to any matter, right, obligation, determination 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, determination or election.

3.3 Powers of the Board. In addition to any other powers set forth in the Plan and subject to the provisions of the Plan, the Board shall have the full and final power and authority, in its discretion:

(a) to determine the persons to whom, and the time or times at which, Awards shall be granted and the number of shares of Stock to be subject to each Award;

(b) to designate Options as Incentive Stock Options or Nonstatutory Stock Options;

(c) to determine the Fair Market Value of shares of Stock or other property;

(d) to determine the terms, conditions and restrictions applicable to each Award (which need not be identical) and any shares acquired upon the exercise thereof, including, without limitation, (i) the exercise price of the Award, (ii) the method of payment for shares purchased upon the exercise of the Award, (iii) the method for satisfaction of any tax withholding obligation arising in connection with the Award or such shares, including by the withholding or delivery of shares of stock, (iv) the timing, terms and conditions of the exercisability of the Award or the vesting of any shares acquired upon the exercise thereof, (v) the time of the expiration of the Award, (vi) the effect of the Participant’s termination of Service with the Participating Company Group on any of the foregoing, and (vii) all other terms, conditions and restrictions applicable to the Award or such shares not inconsistent with the terms of the Plan;

(e) to approve one or more forms of Option Agreement and Stock Purchase Agreement;

(f) to amend, modify, extend, cancel or renew any Award or to waive any restrictions or conditions applicable to any Award or any shares acquired upon the exercise thereof;

(g) to accelerate, continue, extend or defer the exercisability of any Award or the vesting of any shares acquired upon the exercise thereof, including with respect to the period following a Participant’s termination of Service;

(h) to prescribe, amend or rescind rules, guidelines and policies relating to the Plan, or to adopt supplements to, or alternative versions of, the Plan, including, without limitation, as the Board deems necessary or desirable to comply with the laws of, or to accommodate the tax policy or custom of, foreign jurisdictions whose citizens may be granted Awards; and

(i) to correct any defect, supply any omission or reconcile any inconsistency in the Plan or any Option Agreement or Stock Purchase Agreement and to make all other determinations and take such other actions with respect to the Plan or any Award as the Board may deem advisable to the extent not inconsistent with the provisions of the Plan or applicable law.

3.4 Administration with Respect to Insiders. With respect to participation by Insiders in the Plan, at any time that any class of equity security of the Company is registered pursuant to Section 12 of the Exchange Act, the Plan shall be administered in compliance with the requirements, if any, of Rule 16b-3.

3.5 Indemnification. In addition to such other rights of indemnification as they may have as members of the Board or Officers or employees of the Participating Company Group, members of the Board and any Officers or employees of the Participating Company Group to whom authority to act for the Board or the Company is delegated shall be indemnified by the Company against all reasonable expenses, including attorneys’ fees, actually and necessarily incurred in connection with the defense of any action, suit or proceeding, or in connection with any appeal therein, to which they or any of them may be a party by reason of any action taken or failure to act under or in connection with the Plan, or any right granted hereunder, and against all amounts paid by them in settlement thereof (provided such settlement is approved by independent legal counsel selected by the Company) or paid by them in satisfaction of a judgment in any such action, suit or proceeding, except in relation to matters as to which it shall be adjudged in such action, suit or proceeding that such person is liable for gross negligence, bad faith or intentional misconduct in duties; provided, however, that within sixty (60) days after the institution of such action, suit or proceeding, such person shall offer to the Company, in writing, the opportunity at its own expense to handle and defend the same.

4. SHARES SUBJECT TO PLAN.

4.1 Maximum Number of Shares Issuable. Subject to adjustment as provided in Section 4.2, the maximum aggregate number of shares of Stock that may be issued

under the Plan shall be 11,362,000 shares and shall consist of authorized but unissued or reacquired shares of Stock or any combination thereof. If an outstanding Award for any reason expires or is terminated or canceled or if shares of Stock are acquired upon the exercise of an Award subject to a Company repurchase option and are repurchased by the Company at the Participant’s exercise price or purchase price, the shares of Stock allocable to the unexercised portion of such Award or such repurchased shares of Stock shall again be available for issuance under the Plan.

4.2 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 and class of shares subject to the Plan and to any outstanding Options and in the exercise price per share of any outstanding Options. If a majority of the shares which are of the same class as the shares that are subject to outstanding Options are exchanged for, converted into, or otherwise become (whether or not pursuant to an Ownership Change Event, as defined in Section 9.1) shares of another corporation (the “New Shares”), the Board may unilaterally amend the outstanding Options to provide that such Options are exercisable for New Shares. In the event of any such amendment, the number of shares subject to, and the exercise price per share of, the outstanding Options shall be adjusted in a fair and equitable manner as determined by the Board, in its discretion. Notwithstanding the foregoing, any fractional share resulting from an adjustment pursuant to this Section 4.2 shall be rounded down to the nearest whole number, and in no event may the exercise price of any Option 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 4.2 shall be final, binding and conclusive.

5. ELIGIBILITY AND OPTION LIMITATIONS.

5.1 Persons Eligible for Awards. Awards may be granted only to Employees, Consultants, and Directors. For purposes of the foregoing sentence, “Employees,” “Consultants” and “Directors” shall include prospective Employees, prospective Consultants and prospective Directors to whom Awards are granted in connection with written offers of an employment or other service relationship with the Participating Company Group. Eligible persons may be granted more than one (1) Award. However, eligibility in accordance with this Section shall not entitle any person to be granted an Award, or having been granted an Award, to be granted an additional Award.

5.2 Option Grant Restrictions. Any person who is not an Employee on the effective date of the grant of an Option to such person may be granted only a Nonstatutory Stock Option. An Incentive Stock Option granted to a prospective Employee upon the condition that such person become an Employee shall be deemed granted effective on the date such person commences Service with a Participating Company, with an exercise price determined as of such date in accordance with Section 6.1.

5.3 Fair Market Value Limitation. To the extent that options designated as Incentive Stock Options (granted under all stock option plans of the Participating Company Group, including the Plan) become exercisable by a Participant for the first time during any calendar year for stock having a Fair Market Value greater than One Hundred Thousand Dollars

($100,000), the portions of such options which exceed such amount shall be treated as Nonstatutory Stock Options. For purposes of this Section 5.3, options designated as Incentive Stock Options shall be taken into account in the order in which they were granted, and the Fair Market Value of stock shall be determined as of the time the option with respect to such stock is granted. If the Code is amended to provide for a different limitation from that set forth in this Section 5.3, such different limitation shall be deemed incorporated herein effective as of the date and with respect to such Options as required or permitted by such amendment to the Code. If an Option is treated as an Incentive Stock Option in part and as a Nonstatutory Stock Option in part by reason of the limitation set forth in this Section 5.3, the Participant may designate which portion of such Option the Participant is exercising. In the absence of such designation, the Participant shall be deemed to have exercised the Incentive Stock Option portion of the Option first. Separate certificates representing each such portion shall be issued upon the exercise of the Option.

6. TERMS AND CONDITIONS OF OPTIONS.

Options shall be evidenced by Option Agreements specifying the number of shares of Stock covered thereby, in such form as the Board shall from time to time establish. No Option or purported Option shall be a valid and binding obligation of the Company unless evidenced by a fully executed Option Agreement. Option Agreements may incorporate all or any of the terms of the Plan by reference and shall comply with and be subject to the following terms and conditions:

6.1 Exercise Price. The exercise price for each Option shall be established in the discretion of the Board; provided, however, that (a) the exercise price per share for an Incentive Stock Option shall be not less than the Fair Market Value of a share of Stock on the effective date of grant of the Option, (b) no Incentive Stock Option granted to a Ten Percent Stockholder shall have an exercise price per share less than one hundred ten percent (110%) of the Fair Market Value of a share of Stock on the effective date of grant of the Option, and (c) the exercise price per share for a Nonstatutory Stock Option shall not be less than eighty-five percent (85%) of the Fair Market Value of a share of Stock on the effective date of grant. Notwithstanding the foregoing, an Option (whether an Incentive Stock Option or a Nonstatutory Stock Option) may be granted with an exercise price lower than the minimum exercise price set forth above if such Option is granted pursuant to an assumption in a manner qualifying under the provisions of Section 424(a) of the Code.

6.2 Exercisability and Term of Options. Options shall be exercisable at such time or times, or upon such event or events, and subject to such terms, conditions, performance criteria and restrictions as shall be determined by the Board and set forth in the Option Agreement evidencing such Option; provided, however, that (a) no Option shall be exercisable after the expiration of ten (10) years after the effective date of grant of such Option, (b) no Incentive Stock Option granted to a Ten Percent Stockholder shall be exercisable after the expiration of five (5) years after the effective date of grant of such Option, and (c) no Option granted to a prospective Employee, prospective Consultant or prospective Director may become exercisable prior to the date on which such person commences Service with a Participating Company. Subject to the foregoing, unless otherwise specified by the Board in the grant of an Option, any Option granted hereunder shall terminate ten (10) years after the effective date of grant of the Option, unless earlier terminated in accordance with its provisions.

6.3 Payment of Exercise Price.

(a) Forms of Consideration Authorized. Except as otherwise provided below, payment of the exercise price for the number of shares of Stock being purchased pursuant to any Option shall be made (i) in cash, by check or cash equivalent, (ii) by tender to the Company, or attestation to the ownership, of shares of Stock owned by the Participant 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 exercise price, (iii) by delivery of a properly executed notice together with irrevocable instructions to a broker providing for the assignment to the Company of the proceeds of a sale or loan with respect to some or all of the shares being acquired upon the exercise of the Option (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) (a “Cashless Exercise”), (iv) by such other consideration as may be approved by the Board from time to time to the extent permitted by applicable law, or (v) by any combination thereof. The Board may at any time or from time to time, by approval of or by amendment to the standard forms of Option Agreement described in Section 8, or by other means, grant Options which do not permit all of the foregoing forms of consideration to be used in payment of the exercise price or which otherwise restrict one or more forms of consideration.

(b) Limitations on Forms of Consideration.

(i) Tender of Stock. Notwithstanding the foregoing, an 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 would constitute a violation of the provisions of any law, regulation or agreement restricting the redemption of the Company’s stock. Unless otherwise provided by the Board, an 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 Participant for more than six (6) months (and were not used for another Option exercise by attestation during such period) or were not acquired, directly or indirectly, from the Company.

(ii) Cashless Exercise. The Company reserves, at any and all times, the right, in the Company’s sole and absolute discretion, to establish, decline to approve or terminate any program or procedures for the exercise of Options by means of a Cashless Exercise.

6.4 Repurchase Rights. Shares issued under the Plan may be subject to a right of first refusal, one or more repurchase options, or other conditions and restrictions as determined by the Board in its discretion at the time the Option is granted. The Company shall have the right to assign at any time any repurchase right it may have, whether or not such right is then exercisable, to one or more persons as may be selected by the Company. Upon request by the Company, each Participant shall execute any agreement evidencing such transfer restrictions prior to the receipt of shares of Stock hereunder and shall promptly present to the Company any and all certificates representing shares of Stock acquired hereunder for the placement on such certificates of appropriate legends evidencing any such transfer restrictions.

6.5 Effect of Termination of Service.

(a) Option Exercisability. Subject to earlier termination of the Option as otherwise provided herein and unless otherwise provided by the Board in the grant of an Option and set forth in the Option Agreement, an Option shall be exercisable after a Participant’s termination of Service only during the applicable time period determined in accordance with this Section 6.5 and thereafter shall terminate:

(i) Disability. If the Participant’s Service terminates because of the Disability of the Participant, the Option, to the extent unexercised and exercisable on the date on which the Participant’s Service terminated, may be exercised by the Participant (or the Participant’s guardian or legal representative) at any time prior to the expiration of twelve (12) months (or such other period of time as determined by the Board, in its discretion) after the date on which the Participant’s Service terminated, but in any event no later than the date of expiration of the Option’s term as set forth in the Option Agreement evidencing such Option (the “Option Expiration Date”).

(ii) Death. If the Participant’s Service terminates because of the death of the Participant, the Option, to the extent unexercised and exercisable on the date on which the Participant’s Service terminated, may be exercised by the Participant’s legal representative or other person who acquired the right to exercise the Option by reason of the Participant’s death at any time prior to the expiration of twelve (12) months (or such other period of time as determined by the Board, in its discretion) after the date on which the Participant’s Service terminated, but in any event no later than the Option Expiration Date. The Participant’s Service shall be deemed to have terminated on account of death if the Participant dies within three (3) months (or such other period of time as determined by the Board, in its discretion) after the Participant’s termination of Service.

(iii) Termination for Cause. Notwithstanding any other provision of the Plan to the contrary, if the Participant’s Service with the Participating Company Group is terminated for Cause as defined by Participant’s Option Agreement or contract of employment or service (or, if not defined in any of the foregoing, as defined herein), the Option shall terminate and cease to be exercisable immediately upon such termination of Service.

(iv) Other Termination of Service. If the Participant’s Service with the Participating Company Group terminates for any reason, except Disability, death, or Cause, the Option, to the extent unexercised and exercisable by the Participant on the date on which the Participant’s Service terminated, may be exercised by the Participant at any time prior to the expiration of three (3) months (or such other period of time as determined by the Board, in its discretion) after the date on which the Participant’s Service terminated, but in any event no later than the Option Expiration Date.

(b) Extension if Exercise Prevented by Law. Notwithstanding the foregoing, other than the termination for Cause, if the exercise of an Option within the applicable time periods set forth in Section 6.5(a) is prevented by the provisions of Section 12 below, the Option shall remain exercisable until three (3) months (or such longer period of time as determined by the Board, in its discretion) after the date the Participant is notified by the Company that the Option is exercisable, but in any event no later than the Option Expiration Date.

(c) Extension if Participant Subject to Section 16(b). Notwithstanding the foregoing, other than the termination for Cause, if a sale within the applicable time periods set forth in Section 6.5(a) of shares acquired upon the exercise of the Option would subject the Participant 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 Participant would no longer be subject to such suit, (ii) the one hundred and ninetieth (190th) day after the Participant’s termination of Service, or (iii) the Option Expiration Date.

6.6 Transferability of Options. During the lifetime of the Participant, an Option shall be exercisable only by the Participant or the Participant’s guardian or legal representative. No Option shall be assignable or transferable by the Participant, except by will or by the laws of descent and distribution. Notwithstanding the foregoing, to the extent permitted by the Board, in its discretion, and set forth in the Option Agreement evidencing such Option, a Nonstatutory Stock Option shall be assignable or transferable subject to the applicable limitations, if any, described in Rule 701 under the Securities Act, and the General Instructions to Form S-8 Registration Statement under the Securities Act.

7. TERMS AND CONDITIONS OF STOCK PURCHASE RIGHTS.

Stock Purchase Rights shall be evidenced by Stock Purchase Agreements, specifying the number of shares of Stock covered thereby, in such form as the Board shall from time to time establish. No Stock Purchase Right or purported Stock Purchase Right shall be a valid and binding obligation of the Company unless evidenced by a fully executed Stock Purchase Agreement. Stock Purchase Agreements may incorporate all or any of the terms of the Plan by reference and shall comply with and be subject to the following terms and conditions:

7.1 Purchase Price. The purchase price under each Stock Purchase Right shall be established by the Board; provided, however, that (a) the purchase price per share shall be at least eighty-five percent (85%) of the Fair Market Value of a share of Stock either on the effective date of grant of the Stock Purchase Right or on the date on which the purchase is consummated and (b) the purchase price per share under a Stock Purchase Right granted to a Ten Percent Stockholder shall be at least one hundred percent (100%) of the Fair Market Value of a share of Stock either on the effective date of grant of the Stock Purchase Right or on the date on which the purchase is consummated.

7.2 Purchase Period. A Stock Purchase Right shall be exercisable within a period established by the Board, which shall in no event exceed thirty (30) days from the effective date of the grant of the Stock Purchase Right.

7.3 Payment of Purchase Price. Except as otherwise provided below, payment of the purchase price for the number of shares of Stock being purchased pursuant to any Stock Purchase Right shall be made (a) in cash, by check, or cash equivalent, (b) in the form of the Participant’s past service rendered to a Participating Company or for its benefit having a value not less than the aggregate purchase price of the shares being acquired, (c) by such other consideration as may be approved by the Board from time to time to the extent permitted by applicable law, or (d) by any combination thereof. The Board may at any time or from time to time, by adoption of or by amendment to the standard form of Stock Purchase Agreement described in Section 8, or by other means, grant Stock Purchase Rights which do not permit all of the foregoing forms of consideration to be used in payment of the purchase price or which otherwise restrict one or more forms of consideration.

7.4 Vesting and Restrictions on Transfer. Shares issued pursuant to any Stock Purchase Right may or may not be made subject to vesting conditioned upon the satisfaction of such Service requirements, conditions, restrictions or performance criteria (the “Vesting Conditions”) as shall be established by the Board and set forth in the Stock Purchase Agreement evidencing such Award. During any period (the “Restriction Period”) in which shares acquired pursuant to a Stock Purchase Right remain subject to Vesting Conditions, such shares may not be sold, exchanged, transferred, pledged, assigned or otherwise disposed of other than pursuant to an Ownership Change Event, as defined in Section 9.1, or as provided in Section 7.5. Upon request by the Company, each Participant shall execute any agreement evidencing such transfer restrictions prior to the receipt of shares of Stock hereunder and shall promptly present to the Company any and all certificates representing shares of Stock acquired hereunder for the placement on such certificates of appropriate legends evidencing any such transfer restrictions.

7.5 Effect of Termination of Service. Unless otherwise provided by the Board in the grant of a Stock Purchase Right and set forth in the Stock Purchase Agreement, if a Participant’s Service terminates for any reason, whether voluntary or involuntary (including the Participant’s death or disability), then the Company shall have the option to repurchase for the purchase price paid by the Participant any shares acquired by the Participant pursuant to a Stock Purchase Right which remain subject to Vesting Conditions as of the date of the Participant’s termination of Service. The Company shall have the right to assign at any time any repurchase right it may have, whether or not such right is then exercisable, to one or more persons as may be selected by the Company.

7.6 Nontransferability of Stock Purchase Rights. Rights to acquire shares of Stock pursuant to a Stock Purchase Right may not be assigned or transferred in any manner except by will or the laws of descent and distribution, and, during the lifetime of the Participant, shall be exercisable only by the Participant.

8. STANDARD FORMS OF AGREEMENTS.

8.1 Option Agreement. Unless otherwise provided by the Board at the time the Option is granted, an Option shall comply with and be subject to the terms and conditions set forth in the form of Option Agreement approved by the Board concurrently with its adoption of the Plan and as amended from time to time.

8.2 Stock Purchase Agreement. Unless otherwise provided by the Board at the time the Stock Purchase Right is granted, a Stock Purchase Right shall be subject to the terms and conditions set forth in the form of Stock Purchase Agreement approved by the Board concurrently with its adoption of the Plan and as amended from time to time.

8.3 Authority to Vary Terms. The Board shall have the authority from time to time to vary the terms of any standard form of agreement described in this Section 8 either in connection with the grant or amendment of an individual Award or in connection with the authorization of a new standard form or forms; provided, however, that the terms and conditions of any such new, revised or amended standard form or forms of agreement are not inconsistent with the terms of the Plan.

9. CHANGE IN CONTROL.

9.1 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 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 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, a “Transaction”) wherein the stockholders 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, in the case of a Transaction described in Section 9.1(a)(iii) or the corporation or other business entity or 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 or other business entity. 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.

9.2 Effect of Change in Control on Options. In the event of a Change in Control, the surviving, continuing, successor, or purchasing corporation or other business entity or parent corporation thereof, as the case may be (the “Acquiring Corporation”), may, without the consent of any Participant, assume the Company’s rights and obligations under outstanding Options. The Board, in its discretion, shall determine whether the treatment of an Option by the Acquiring Corporation constitutes an assumption of the Company’s rights and obligations under outstanding Options for purposes of this Section 9.2. In the event the Acquiring Corporation

elects not to assume, as determined by the Board, outstanding Options in connection with a Change in Control, the exercisability and vesting of each outstanding Option and any shares acquired upon the exercise thereof held by an Participant whose Service has not terminated prior to such date, shall be fully accelerated and exercisable in full, effective as of the date ten (10) days prior to the date of the Change in Control. The exercise or vesting of any Option that was permissible solely by reason of this Section 9.2 shall be conditioned upon the consummation of the Change in Control. Any Options which are not assumed by the Acquiring Corporation in connection with the Change in Control nor exercised as of the date of the Change in Control shall terminate and cease to be outstanding effective as of the date of the Change in Control. Notwithstanding the foregoing, shares acquired upon exercise of an 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 the Option Agreement evidencing such Option except as otherwise provided in such Option Agreement. Furthermore, notwithstanding the foregoing, if the Change in Control results from an Ownership Change Event described in Section 9.1(a)(i) and the Company is the surviving or continuing corporation and immediately after such Change in Control 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 outstanding Options shall not terminate unless the Board otherwise provides in its discretion.

9.3 Effect of Change in Control on Stock Purchase Right. In the event of a Change in Control, the surviving, continuing, successor, or purchasing corporation or other business entity or parent thereof, as the case may be (the “Acquiring Corporation”), may, without the consent of any Participant, assume the Company’s rights and obligations under outstanding Stock Purchase Rights. Any Stock Purchase Rights which are not assumed by the Acquiring Corporation in connection with the Change in Control nor exercised as of the date of the Change in Control shall terminate and cease to be outstanding effective as of the date of the Change in Control. Notwithstanding the foregoing, shares acquired upon exercise of a Stock Purchase Right 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 the Stock Purchase Agreement evidencing such Stock Purchase Right except as otherwise provided in such Stock Purchase Agreement. Furthermore, notwithstanding the foregoing, if the corporation the stock of which is subject to the outstanding Stock Purchase Rights immediately prior to an Ownership Change Event described in Section 9.1(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 outstanding Stock Purchase Rights shall not terminate unless the Board otherwise provides in its discretion.

9.4 Federal Excise Tax Under Section 4999 of the Code.

(a) Excess Parachute Payment. In the event that any acceleration of vesting pursuant to an Award and any other payment or benefit received or to be received by a Participant would subject the Participant to any excise tax pursuant to Section 4999 of the Code

due to the characterization of such acceleration of vesting, payment or benefit as an “excess parachute payment” under Section 280G of the Code, the Participant may elect, in his or her sole discretion, to reduce the amount of any acceleration of vesting called for under the Award in order to avoid such characterization.

(b) Determination by Independent Accountants. To aid the Participant in making any election called for under Section 9.4(a), no later than the date of the occurrence of any event that might reasonably be anticipated to result in an “excess parachute payment” to the Participant as described in Section 9.4(a), the Company shall request a determination in writing by independent public accountants selected by the Company (the “Accountants”). As soon as practicable thereafter, the Accountants shall determine and report to the Company and the Participant the amount of such acceleration of vesting, payments and benefits which would produce the greatest after-tax benefit to the Participant. For the purposes of such determination, the Accountants may rely on reasonable, good faith interpretations concerning the application of Sections 280G and 4999 of the Code. The Company and the Participant shall furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make their required determination. The Company shall bear all fees and expenses the Accountants may reasonably charge in connection with their services contemplated by this Section 9.4(b).

10. TAX AND SOCIAL SECURITY WITHHOLDING.

10.1 Tax Withholding in General. The Company shall have the right to deduct from any and all payments made under the Plan, or to require the Participant, through payroll withholding, cash payment or otherwise, including by means of a Cashless Exercise of an Option, to make adequate provision for, the federal, state, local and foreign taxes and social security, if any, required by law to be withheld by the Participating Company Group with respect to an Award or the shares acquired pursuant thereto. The Company shall have no obligation to deliver shares of Stock or to release shares of Stock from an escrow established pursuant to an Option Agreement or Stock Purchase Agreement until the Participating Company Group’s tax withholding obligations have been satisfied by the Participant.

10.2 Withholding in Shares. The Company shall have the right, but not the obligation, to deduct from the shares of Stock issuable to a Participant upon the exercise of an Award, or to accept from the Participant the tender of, a number of whole shares of Stock having a Fair Market Value, as determined by the Company, equal to all or any part of the tax withholding obligations of the Participating Company Group. The Fair Market Value of any shares of Stock withheld or tendered to satisfy any such tax withholding obligations shall not exceed the amount determined by the applicable minimum statutory withholding rates.

11. PROVISION OF INFORMATION.

Each Participant shall be given access to information concerning the Company equivalent to that information generally made available to the Company’s common stockholders.

12. COMPLIANCE WITH SECURITIES LAW.

The grant of Awards and the issuance of shares of Stock upon exercise of Awards shall be subject to compliance with all applicable requirements of federal, state and foreign law with respect to such securities. Awards 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, no Award may be exercised unless (a) a registration statement under the Securities Act shall at the time of exercise of the Award be in effect with respect to the shares issuable upon exercise of the Award or (b) in the opinion of legal counsel to the Company, the shares issuable upon exercise of the Award may be issued in accordance with the terms of an applicable exemption from the registration requirements of the Securities Act. 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 hereunder 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 any Award, the Company may require the Participant 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.

13. CONTRACT OF EMPLOYMENT.

Notwithstanding any other provision of this Plan:

(a) this Plan shall not form in whole or part any contract of employment between any Participating Company and any Employee of any such company and the rights and obligations of any individual under the terms of his office or employment with any Participating Company shall not be affected by his participation in this Plan or any right which he may have to participate in it and this Plan shall afford such an individual no additional rights to compensation or damages in consequence of the termination of such office or employment for any reason whatsoever;

(b) no Employee shall be entitled to any compensation or damages or any other remedy for any loss or potential loss which he may suffer by reason of being unable to exercise an Option in consequence of the loss or cessation of his office or employment with any Participating Company for any reason whatsoever;

(c) this Plan shall not confer on any person any legal or equitable rights (other than those constituting the Options themselves) against any Participating Company directly or indirectly, or give rise to any cause of action at law or in equity against any Participating Company.

14. TERMINATION OR AMENDMENT OF PLAN.

The Board may terminate or amend the Plan at any time. However, subject to changes in applicable law, regulations or rules that would permit otherwise, without the approval of the Company’s stockholders, there shall be (a) no increase in the maximum aggregate number

of shares of Stock that may be issued under the Plan (except by operation of the provisions of Section 4.2), (b) no change in the class of persons eligible to receive Incentive Stock Options, and (c) no other amendment of the Plan that would require approval of the Company’s stockholders under any applicable law, regulation or rule. No termination or amendment of the Plan shall affect any then outstanding Award unless expressly provided by the Board. In any event, no termination or amendment of the Plan may adversely affect any then outstanding Award without the consent of the Participant, unless such termination or amendment is required to enable an Option designated as an Incentive Stock Option to qualify as an Incentive Stock Option or is necessary to comply with any applicable law, regulation or rule.

15. STOCKHOLDER APPROVAL.

The Plan or any increase in the maximum aggregate number of shares of Stock issuable thereunder as provided in Section 4.1 (the “Authorized Shares”) shall be approved by a majority of the outstanding securities of the Company entitled to vote within twelve (12) months of the date before or after adoption thereof by the Board. Awards granted prior to stockholder approval of the Plan or in excess of the Authorized Shares previously approved by the stockholders shall become exercisable no earlier than the date of stockholder approval of the Plan or such increase in the Authorized Shares, as the case may be.