Exhibit 23.1

                 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement on Form S-8 of our report dated
March 10, 2000 on the consolidated financial statements of Sonus Networks,
Inc. included in Sonus Networks, Inc.'s Prospectus filed pursuant to Rule
424(b)(1) File No. 333-52682 dated January 12, 2001 and to all references to
our Firm included in this registration statement.


                                        /s/ ARTHUR ANDERSEN LLP


Boston, Massachusetts
January 31, 2001