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").

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(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 thatthis 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 thatthis 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.

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