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Exhibit 10.1    
    

Sonus Networks, Inc.  

Nonstatutory Stock Option Agreement

Granted Under 2007 Stock Incentive Plan  

1.     Grant of Option.

        This agreement evidences the grant by Sonus Networks, Inc. a Delaware corporation (the "Company"), on the date set forth on the Notice of Grant (the "Grant
Date") to the Participant, of an option to purchase, in whole or in part, on the terms provided herein and in the Company's 2007 Stock Incentive Plan (the "Plan"), the number of shares set forth on
the Notice of Grant (the "Shares") of common stock, $0.001 par value per share, of the Company ("Common Stock") at the price per Share on the Notice of Grant. Unless earlier terminated, this option
shall expire at 5:00 p.m., Eastern Time, on the date ten years from the Grant Date (the "Final Exercise Date"). 

        It
is intended that the option evidenced by this agreement shall not be an incentive stock option as defined in Section 422 of the Internal Revenue Code of 1986, as amended, and
any regulations promulgated thereunder (the "Code"). Except as otherwise indicated by the context, the term "Participant", as used in this option, shall be deemed to include any person who acquires
the right to exercise this option validly under its terms. 

2.     Vesting Schedule.

        This
option will become exercisable ("vest") as to 25% of the original number of Shares on the first anniversary of the Grant Date and as to an additional 2.0833% of the original number
of Shares at the end of each successive month period following the first anniversary of the Grant Date until the fourth anniversary of the Grant Date (the "Final Vesting Date"). All Shares that are
not at any particular time vested shall be referred to as "Unvested Shares." 

        The
right of exercise shall be cumulative so that to the extent the option is not exercised in any period to the maximum extent permissible it shall continue to be exercisable, in whole
or in part, with respect to all Shares for which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan. 

        Effective
immediately prior to the occurrence of an Acquisition (as defined in the Plan), an additional number of Unvested Shares equal to the lesser of (i) the number of then
Unvested Shares or (ii) 25% of the total number of Shares shall be deemed vested. In such event, the balance of the Unvested Shares shall continue to vest in the monthly amount set forth in
Section 2 hereof and the Final Vesting Date shall be shortened by 12 months. 

3.     Exercise of Option.

        (a)    Form of Exercise.    Each election to exercise this option shall be in writing, signed by the Participant, and
received by the Company at its principal office, accompanied by this agreement, and payment in full in the manner provided in the Plan. The Participant may purchase less than the number of shares
covered hereby, provided that no partial exercise of this option may be for any fractional share. 

        (b)    Continuous Relationship with the Company Required.    Except as otherwise provided in this Section 3,
this option may not be exercised unless the Participant, at the time he or she exercises this option, is, and has been at all times since the Grant Date, an employee, officer or director of, or
consultant or advisor to, the Company or any other entity the employees, officers, directors, consultants, or advisors of which are eligible to receive option grants under the Plan (an "Eligible
Participant"). 

 

        (c)    Termination of Relationship with the Company.    If the Participant ceases to be an Eligible Participant for
any reason, then, except as provided in paragraphs (d) and (e) below, the right to exercise this option shall terminate three months after such cessation (but in no event after the Final
Exercise Date), provided that this option shall be exercisable only to the extent that the Participant was entitled to exercise this option on the date
of such cessation. Notwithstanding the foregoing, if the Participant, prior to the Final Exercise Date, violates the non-competition or confidentiality provisions of any employment
contract, confidentiality and nondisclosure agreement or other agreement between the Participant and the Company, the right to exercise this option shall terminate immediately upon such violation. 

        (d)    Exercise Period Upon Death or Disability.    If the Participant dies or becomes disabled (within the meaning of
Section 22(e)(3) of the Code) prior to the Final Exercise Date while he or she is an Eligible Participant and the Company has not terminated such relationship for "cause" as specified in
paragraph (e) below, this option shall be exercisable, within the period of 180 days following the date of death or disability of the Participant, by the Participant (or in the case of
death by an authorized transferee), provided that this option shall be exercisable only to the extent that this option was exercisable by the
Participant on the date of his or her death or disability, and further provided that this option shall not be exercisable after the Final Exercise Date. 

        (e)    Termination for Cause.    If, prior to the Final Exercise Date, the Participant's employment or other
relationship with the Company is terminated by the Company for Cause (as defined below), the right to exercise this option shall terminate immediately upon the effective date of such termination of
employment or other relationship. If the Participant is party to an employment, consulting or severance agreement with the Company that contains a definition of "cause" for termination of employment
or other relationship, "Cause" shall have the meaning ascribed to such term in such agreement. Otherwise, "Cause" shall mean willful misconduct by the Participant or willful failure by the Participant
to perform his or her responsibilities to the Company (including, without limitation, breach by the Participant of any provision of any employment, consulting, advisory, nondisclosure,
non-competition or other similar agreement between the Participant and the Company), as determined by the Company, which determination shall be conclusive. The Participant shall be
considered to have been discharged for "Cause" if the Company determines, within 30 days after the Participant's resignation, that discharge for cause was warranted. 

4.     Withholding.

        No
Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to the Company, or makes provision satisfactory to the Company for payment of, any
federal, state or local withholding taxes required by law to be withheld in respect of this option. 

5.     Nontransferability of Option.

        This
option may not be sold, assigned, transferred, pledged or otherwise encumbered by the Participant, either voluntarily or by operation of law, except by will or the laws of descent
and distribution, and, during the lifetime of the Participant, this option shall be exercisable only by the Participant. 

6.     Provisions of the Plan.

        This
option is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this option. 

2

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Exhibit 10.1QuickLinks
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Exhibit 10.2    
    

Sonus Networks, Inc.  

Award of Restricted Stock and Restricted Stock Agreement

Under the 2007 Stock Incentive Plan  

Additional Terms and Conditions  

        1.     Relationship to Plan.    This Award of Restricted Stock and Restricted Stock Agreement (the "Agreement") is made
between Sonus Networks, Inc. ("Sonus" or the "Company") and the employee identified on the accompanying signature page (the "Employee"). The Award is granted pursuant to the Company's 2007
Stock Incentive Plan (the "Plan"), and is in all respects subject to the terms and conditions of the Plan, a copy of which has been provided to the Employee (the receipt of which the Employee hereby
acknowledges). Capitalized terms used and not otherwise defined in this Agreement are used as defined in the Plan. The Employee hereby accepts the Award subject to all the terms and provisions of the
Plan. The Employee further agrees that all decisions under and interpretations of the Plan by the Company will be final, binding, and conclusive upon the Employee and his or her successors, permitted
assigns, heirs, and legal representatives. 

        2.     Award and Issuance of Shares.    The Company has awarded to the Employee, in consideration of employment
services rendered and to be rendered, such number of shares of common stock, $0.001 par value, as is listed on the cover page of this Agreement (the "Shares"). The Company shall issue the Shares to
the Employee either by electronic record or by stock certificate issued in the name of the Employee. The Employee agrees that unvested Shares shall be subject to forfeiture as set forth in
Section 4 of this Agreement and the restrictions on transfer set forth in Section 5 of this Agreement. The Shares shall be deposited in Escrow in accordance with Section 6 of this
Agreement. 

        3.     Vesting.    The Shares shall vest as follows: (i) 25% of the Shares shall vest on the first anniversary
of the date of grant specified on the cover page of this Agreement (the "Award Date") and (ii) 12.5% of the Shares shall vest on the last day of each six-month period following the
first anniversary of the Award Date, through and including the fourth anniversary of the Award Date. Any fractional number of Shares resulting from the application of the foregoing percentages shall
be rounded down to the nearest whole number of Shares. The Company may in its discretion accelerate the vesting schedule at any time. 

        Effective
immediately prior to the consummation of an Acquisition (as defined in the Plan), an additional 25% of the number of Shares covered by this Award shall become vested, with the
remaining unvested Shares continuing to vest pursuant to the vesting schedule set forth above, provided that such vesting schedule shall be shortened by one year. 

        4.     Forfeiture of Shares.    In the event that the Employee ceases to be employed by the Company or a subsidiary for
any reason prior to the fourth anniversary of the Award Date, then, effective upon the cessation of his or her employment, the Employee shall automatically forfeit ("Forfeiture"), without any action
required on the part of the Employee, all of the unvested Shares ("Forfeited Shares") that the Employee received under the Award without the payment of any consideration by the Company and the
Forfeited Shares shall revert to the Company. Upon and after Forfeiture, the Company shall not pay any dividend to the Employee on account of such Forfeited Shares or permit the Employee to exercise
any of the privileges or rights of a stockholder with respect to such Forfeited Shares, but shall, in so far as permitted by law, treat the Company as the owner of the Forfeited Shares. Military or
sick leave or other bona fide leave will not be deemed a termination of employment provided that it does not exceed the longer of 90 days or the period during which the absent Employee's
re-employment rights are guaranteed by statute or by contract. 

        5.     Restrictions on Transfer.    The Employee shall not, during the term of this Agreement, sell, assign, transfer,
pledge, hypothecate or otherwise dispose of, by operation of law or otherwise (collectively "Transfer"), any of the Shares, or any interest therein, unless and until such Shares are no 

longer
subject to risk of Forfeiture. Notwithstanding the foregoing, the Employee may transfer (i) any or all of his Shares (A) to his parents, spouse, children, stepchildren,
grandchildren, or siblings, or spouse of any such person (collectively, "Immediate Family"), (B) to a trust established for the benefit of his Immediate Family or himself, or (C) to a
limited liability company or limited partnership, the members or partners of which are members of his Immediate Family or himself, or (ii) any or all of his Shares under his will,  provided that all
such Shares transferred under (i) or (ii) shall remain subject to this Agreement (including without limitation the
restrictions on transfer set forth in this Section 5 and the Forfeiture provision in Section 4) and such permitted transferee shall, as a condition to such transfer, deliver to the
Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. The Company shall not be required (a) to transfer on its books
any of the Shares which shall have been sold or transferred in violation of any of the provisions set forth in this Agreement, or (b) to treat as owner of such Shares or to pay dividends to any
transferee to whom any such Shares shall have been so sold or transferred. 

        6.     Escrow.    The Shares shall be deposited by the Employee in escrow either by electronic record or by stock
certificate upon (or as promptly as practicable following) the execution of this Agreement and shall be held in escrow by the Secretary of the Company, as escrow agent (the "Escrow Agent"). Upon
vesting of the Shares, the Escrow Agent shall release or electronically transfer to the Employee, upon request, those Shares, which have vested (other than any withheld by the Company pursuant to
Section 10(b)). In the event Shares are forfeited pursuant to Section 4 or withheld by the Company pursuant to Section 10(b), the Company shall give written notice to the Employee
and to the Escrow Agent specifying the number of Forfeited Shares or Shares to be withheld. The Employee and the Company authorize the Escrow Agent to take all necessary or appropriate actions
consistent with the terms of this Agreement, including the delivery to the Company of those Shares and stock powers for the Shares being forfeited or withheld by the Company. The escrow shall
terminate upon the earliest of (i) the vesting and lapse of forfeiture of all Shares awarded under this Agreement, (ii) the election by the Company to waive forfeiture on all of the
unvested Shares, or (iii) the election by the Company to terminate this escrow. If at the time of such termination the Escrow Agent should have in its possession any Shares owed to the
Employee, the Escrow Agent shall promptly deliver such Shares to the Employee and shall be discharged of all further obligations hereunder. The Escrow Agent shall be obligated only for the performance
of such duties as are specifically set forth herein and may rely and shall be protected in relying or refraining from acting on any instrument reasonably believed by the Escrow Agent to be genuine and
to have been signed or presented by the proper party or parties. The Escrow Agent or the Company shall not be liable for any act or omission in good faith and in the exercise of reasonable judgment.
It is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the Shares held by the Escrow Agent hereunder, the Escrow Agent is
authorized to retain such Shares in its possession without liability to anyone all until such dispute shall have been settled either by mutual written agreement of the parties concerned or by a final
order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired. All reasonable costs, fees and disbursements incurred by the Escrow Agent in connection with the
performance of its duties hereunder shall be borne by the Company. 

        Any
stock certificate issued to the Employee representing unvested Shares shall have affixed thereto a legend in substantially the following form: "These shares of stock are subject to
forfeiture provisions and restrictions on transfer set forth in an Award of Restricted Stock and Restricted Stock Agreement between the corporation and the owner of these shares (or his or her
predecessor in interest), and such Agreement is available for inspection without charge at the office of the Secretary of the corporation." If the Shares are issued electronically rather than by a
stock certificate issued to the Employee, the electronic record reflecting the issuance of the Shares to the Employee shall bear such a legend or other notation. 

        7.     Adjustments.    In the event of any stock split, reverse stock split, stock dividend, recapitalization,
combination of shares, reclassification of shares, spin-off or other similar change in capitalization or event, or any dividend or distribution to holders of Common Stock other than an 

ordinary
cash dividend, or any Reorganization Event (as defined in the Plan), the Shares and the other terms of this Agreement shall be adjusted in the manner provided for in Section 10 of the
Plan. 

        8.     No Obligation to Continue Employment.    The Company and any related corporation are not by the Plan or this
Award obligated to continue the Employee's employment. 

        9.     Compliance with Laws.    The obligations of the Company and the Employee under this Agreement are subject to all
applicable laws, rules, and regulations, including all applicable federal and state securities laws and the obtaining of all such approvals by government agencies as may be deemed necessary or
appropriate by the Board of Directors ("Board") or the relevant committee of the Board. 

        10.   Tax Matters.

        (a)   Section 83(b) Election.    The Employee may elect under Section 83(b) of the Internal Revenue
Code of 1986, as amended, to be taxed at the time the Shares are acquired on the Award Date ("Section 83(b) Election"). A Section 83(b) Election must be filed with the Internal Revenue
Service within thirty (30) days of the Award Date. If the Employee elects, in accordance with Section 83(b), to recognize ordinary income in the year of acquisition of the Shares, the
Company will require at the time of such election an additional payment by the Employee in an amount equal to any federal, state, local or other taxes of any kind required by law to be withheld with
respect to the issuance of the Shares to the Employee. The Employee acknowledges that he or she is responsible for consulting with his or her own tax advisors regarding the Section 83(b)
Election and is solely responsible to file a timely election under Section 83(b). 

        (b)   Withholding Taxes.    If the Employee does not make a Section 83(b) Election, then the Employee
acknowledges and agrees that the Employee is obligated to pay to the Company the amount of any
federal, state, local or other taxes of any kind required by law to be withheld with respect to the vesting of the Shares. The Employee shall satisfy such tax withholding obligations by delivery to
the Company, on each date on which Shares vest under this Agreement, such number of Shares that vest on such date as have a fair market value (calculated using the last reported sale price of the
common stock of the Company on the NASDAQ Global Select Market on the trading date immediately prior to such vesting date) equal to the amount of the Company's withholding obligation; provided,
however, that the total tax withholding cannot exceed the Company's minimum statutory withholding obligations (based on minimum statutory withholding rates for federal and state tax purposes,
including payroll taxes, that are applicable to such supplemental taxable income). Such delivery of Shares to the Company shall be deemed to happen automatically, without any action required on the
part of the Employee, and the Company is hereby authorized to take such actions as are necessary to effect such delivery of Shares to the Company. 

        (c)   Tax Advice.    The Employee acknowledges that he or she is responsible for reviewing with his or her own tax
advisors the federal, state, local and other tax consequences of this investment and the transactions contemplated by this Agreement. The Employee acknowledges that he or she is not relying on any
statements or representations of the Company or any of its agents. The Employee understands that the Employee (and not the Company) shall be responsible for the Employee's own tax liability that may
arise as a result of this investment or the transactions contemplated by this Agreement. 

        11.   General.    This Agreement will be governed by and interpreted and construed in accordance with the internal
laws of the State of Delaware (without reference to principles of conflicts or choice of law). The captions of the sections of this Agreement are for reference only and will not affect the
interpretation or construction of this Agreement. This Agreement will bind and inure to the benefit of the parties and their respective successors, permitted assigns, heirs, devisees, and legal
representatives. This Agreement (including the Plan) supersedes all prior agreements, written or oral, between the Employee and the Company relating to the subject matter of this Agreement. This
Agreement may be amended or modified only by a written agreement signed by the Company and the Employee. 

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Exhibit 10.2

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