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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                    FORM 8-K

                                 CURRENT REPORT
     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

                                 MARCH 21, 2006

                DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED)

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                              SONUS NETWORKS, INC.
             (Exact Name of Registrant as Specified in its Charter)

          DELAWARE                    000-30229                  04-3387074
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(State or Other Jurisdiction         (Commission               (IRS Employer
     of Incorporation)               File Number)            Identification No.)

                250 APOLLO DRIVE, CHELMSFORD, MASSACHUSETTS 01824
               (Address of Principal Executive Offices) (Zip Code)

                                 (978) 614-8100
              (Registrant's telephone number, including area code)

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Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange
     Act (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

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ITEM 1.01. ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

        On March 21, 2006, the Compensation Committee of the Board of Directors
of Sonus Networks, Inc. (the "Company") approved certain payments under the
Company's incentive compensation program for fiscal year 2005 for executive
officers and employees, including certain executive officers of the Company
reporting under Section 16(a) of the Securities Exchange Act of 1934. Under the
program, any incentive compensation payment to the Chief Executive Officer is
awarded at the discretion of the Compensation Committee and, except as may
otherwise be provided in individual contracts with Executive Officers, any
incentive compensation payment to other executive officers and employees are
awarded at the discretion of the Chief Executive Officer and Compensation
Committee. Awards are based on the Company's achieving certain operating and
financial measures for fiscal year 2005, including order activity, revenue,
operating profit and cash flow from operations, as well as individual
performance objectives. The Compensation Committee and the Chief Executive
Officer exercised their discretion and approved certain limited awards under the
incentive compensation program reflective of their view of the overall
performance of the business for the year and the individual performance of
participants, although not all of the target measures were achieved. The target
and actual bonus payment for each eligible named executive officer are set forth
below:

       Name                Title          Target Incentive   Bonus Payment
  ---------------   -------------------   ----------------   -------------
  Hassan Ahmed      Chief Executive       $        318,750   $      79,688
                    Officer

  Steve Edwards     Chief Marketing                147,000          42,226
                    Officer

  Albert Notini     President and                  276,250       71,900.70
                    Chief Operating
                    Officer

  Ellen Richstone   Chief Financial                156,000          56,761
                    Officer



                                    SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Date: March 27, 2006                               SONUS NETWORKS, INC.

                                                   By:   /s/ Ellen Richstone
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                                                         Ellen Richstone
                                                         Chief Financial Officer