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  <p style="border:none;color:windowtext;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
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  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES<br>
  </font></b><b><font size="5" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WASHINGTON, D.C. 20549</font></b></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to
  Section&nbsp;13 or 15(d)&nbsp;of the Securities Exchange Act of 1934</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:0pt;">May&nbsp;9, 2008</font></b></h1>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Date
  of Report (Date of earliest event reported)</font></b></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SONUS NETWORKS, INC.</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact Name of Registrant as
  Specified in its Charter)</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">DELAWARE</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">000-30229</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">04-3387074</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or Other Jurisdiction<br>
    of Incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer<br>
    Identification No.)</font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">7
  TECHNOLOGY PARK DRIVE, WESTFORD, MASSACHUSETTS 01886</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of Principal Executive
  Offices) (Zip Code)</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(978)
  614-8100</font></b></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s telephone number,
  including area code)</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Check the
  appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously
  satisfy the filing obligation of the registrant under any of the following
  provisions (<i>see</i> General
  Instruction A.2. below):</font></b></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="93%" style="border-collapse:collapse;margin-left:.5in;width:93.0%;">
   <tr>
    <td width="24" valign="top" style="padding:0in 0in 0in 0in;width:.25in;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Wingdings" style="font-size:10.0pt;font-weight:normal;">&#168;</font></b></p>
    </td>
    <td width="646" valign="top" style="padding:0in 0in 0in 0in;width:484.2pt;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Written
    communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR
    230.425)</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="24" valign="top" style="padding:0in 0in 0in 0in;width:.25in;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Wingdings" style="font-size:10.0pt;font-weight:normal;">&#168;</font></b></p>
    </td>
    <td width="646" valign="top" style="padding:0in 0in 0in 0in;width:484.2pt;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Soliciting
    material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="24" valign="top" style="padding:0in 0in 0in 0in;width:.25in;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Wingdings" style="font-size:10.0pt;font-weight:normal;">&#168;</font></b></p>
    </td>
    <td width="646" valign="top" style="padding:0in 0in 0in 0in;width:484.2pt;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Pre-commencement
    communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17
    CFR 240.14d-2(b))</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="24" valign="top" style="padding:0in 0in 0in 0in;width:.25in;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Wingdings" style="font-size:10.0pt;font-weight:normal;">&#168;</font></b></p>
    </td>
    <td width="646" valign="top" style="padding:0in 0in 0in 0in;width:484.2pt;">
    <p align="left" style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Pre-commencement
    communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17
    CFR 240.13e-4(c))</font></b></p>
    </td>
   </tr>
  </table>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;color:windowtext;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  </div>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\lcunha\08-14175-1\task2943754\14175-1-ba.htm',USER='lcunha',CD='May 15 14:59 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="10%" valign="top" style="padding:0in 0in 0in 0in;width:10.66%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 5.02.</font></b></p>
    </td>
    <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.34%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Departure of Directors or Certain Officers;
    Election of Directors; Appointment of Certain Officers; Compensatory
    Arrangements of Certain Officers.</font></b></p>
    </td>
   </tr>
  </table>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;9, 2008,&nbsp;the
  Board of Directors of Sonus Networks,&nbsp;Inc. (the &#147;Registrant&#148;) appointed
  Wayne Pastore as the Registrant&#146;s principal accounting officer effective May
  19, 2008.&#160; Mr.&nbsp;Pastore will serve as
  Vice President, Finance and Corporate Controller of the Registrant, replacing
  Paul K. McDermott who will be leaving the Registrant.</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Mr.&nbsp;Pastore, age 43, has been Director,
  Business Process Improvement of the Registrant since February&nbsp;2008.&#160; From September&nbsp;2006 to February&nbsp;2008,
  Mr.&nbsp;Pastore was Director of Financial Planning and Analysis of Sycamore
  Networks,&nbsp;Inc., an optical switching company. From December&nbsp;2003 to September&nbsp;2006,
  he was Corporate Controller of Spotfire, Inc, a business analytics software
  company.&#160; Mr. Pastore is a licensed
  certified public accountant and holds a J.D. from Suffolk University Law
  School.</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\lcunha\08-14175-1\task2943754\14175-1-ba.htm',USER='lcunha',CD='May 15 14:59 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p align="center" style="color:windowtext;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">SIGNATURE</font></b></h1>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman">&nbsp;</font></b></h1>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">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.</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="letter-spacing:-.1pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="letter-spacing:-.1pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="96%" style="border-collapse:collapse;width:96.64%;">
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.74%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Date: May&nbsp;15, 2008</font></p>
    </td>
    <td width="48%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:48.26%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">SONUS NETWORKS,&nbsp;INC.</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.74%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="48%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:48.26%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.74%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="48%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:48.26%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">By:</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.74%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.18%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="43%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:43.08%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">/s/ Charles J. Gray</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.74%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.18%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="43%" valign="top" style="padding:0in 0in 0in 0in;width:43.08%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Charles J. Gray</font></p>
    </td>
   </tr>
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    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Vice President and General
    Counsel</font></p>
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text: UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  WASHINGTON, D.C. 20549
  FORM 8-K
  CURRENT REPORT
  Pursuant to
  Section 13 or 15(d) of the Securities Exchange Act of 1934
  May 9, 2008
  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
  of Incorporation)
  (Commission File Number)
  (IRS Employer
  Identification No.)
  7
  TECHNOLOGY PARK DRIVE, WESTFORD, MASSACHUSETTS 01886
  (Address of Principal Executive
  Offices) (Zip Code)
  (978)
  614-8100
  (Registrant's telephone number,
  including area code)
  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))
  Item 5.02.
  Departure of Directors or Certain Officers;
    Election of Directors; Appointment of Certain Officers; Compensatory
    Arrangements of Certain Officers.
  On May 9, 2008, the
  Board of Directors of Sonus Networks, Inc. (the "Registrant") appointed
  Wayne Pastore as the Registrant's principal accounting officer effective May
  19, 2008.  Mr. Pastore will serve as
  Vice President, Finance and Corporate Controller of the Registrant, replacing
  Paul K. McDermott who will be leaving the Registrant.
  Mr. Pastore, age 43, has been Director,
  Business Process Improvement of the Registrant since February 2008.  From September 2006 to February 2008,
  Mr. Pastore was Director of Financial Planning and Analysis of Sycamore
  Networks, Inc., an optical switching company. From December 2003 to September 2006,
  he was Corporate Controller of Spotfire, Inc, a business analytics software
  company.  Mr. Pastore is a licensed
  certified public accountant and holds a J.D. from Suffolk University Law
  School.
  2
  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: May 15, 2008
  SONUS NETWORKS, INC.
  By:
  /s/ Charles J. Gray
  Charles J. Gray
  Vice President and General
    Counsel
  3