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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 15, 2005

                Date of Report (Date of earliest event reported)
                ------------------------------------------------

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



    DELAWARE                          000-30229           04-3387074
 ___________                          _________           __________

(State or Other Jurisdiction   (Commission File Number)  (IRS Employer
  of Incorporation)                                     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))


     The information in this Current Report on Form 8-K and the exhibits
attached hereto shall not be deemed "filed" for purposes of Section 18 of the
Securities Exchange Act of 1934, as amended, or incorporated by reference in any
filing under the Securities Act of 1933, as amended, or the Exchange Act, except
as shall be expressly set forth by specific reference in such a filing.

Item 2.02. Results of Operations and Financial Condition.

     On March 15, 2005, Sonus Networks, Inc. issued a press release reporting
its financial results for the quarter and year ended December 31, 2004. A copy
of the press release is attached as Exhibit 99.1 hereto.

Item 9.01. Financial Statements and Exhibits.

      (c)  Exhibits

           The following exhibit relating to Item 2.02 shall be deemed to
           be furnished, and not filed:

           99.1     Press release of Sonus Networks, Inc. dated March 15, 2005
                    reporting financial results for the quarter and year ended
                    December 31, 2004.



                                    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 15, 2005               SONUS NETWORKS, INC.
                                   By:
                                          /s/ Ellen Richstone
                                          -------------------
                                          Ellen Richstone
                                          Chief Financial Officer




                                  Exhibit Index

99.1        Press release of Sonus Networks, Inc. dated March 15, 2005 reporting
            financial results for the quarter and year ended December 31, 2004.