content: <html>
  
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  <p align="center" style="border:none;color:windowtext;margin:0in 0in .0001pt;padding:0in;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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  <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;">&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;">UNITED
  STATES</font></b></p>
  
  <h2 style="color:windowtext;font-weight:bold;margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;">SECURITIES AND
  EXCHANGE COMMISSION</font></b></h2>
  
  <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 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;">&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 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;">&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" style="font-size:10.0pt;">&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" style="font-size:10.0pt;">&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" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:0pt;">May&nbsp;16, 2008</font></b></h1>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</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" style="font-size:10.0pt;">Date of Report (Date of earliest event
  reported)</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;">&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 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;">&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" style="font-size:10.0pt;">&nbsp;</font></p>
  
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   <tr>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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</font></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;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;">of Incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;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 .7pt 0in .7pt;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:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;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 .7pt 0in .7pt;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;">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" style="font-size:10.0pt;">&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" style="font-size:10.0pt;">&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;">&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;">(Registrant&#146;s telephone number, including area 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" style="font-size:10.0pt;">&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>
  
  <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;">&nbsp;</font></b></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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;">&nbsp;</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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;">&nbsp;</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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;">&nbsp;</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.92%;">
    <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:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="2%" valign="top" style="padding:0in .7pt 0in .7pt;width:2.98%;">
    <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="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.12%;">
    <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>
  
  <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;">&nbsp;</font></b></p>
  
  <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" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <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>
  
  <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\brosent\08-14767-1\task2949296\14767-1-ba.htm',USER='brosent',CD='May 19 15:55 2008' -->
  
  
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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;">&nbsp;</font></p>
  
  <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>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="9%" valign="top" style="padding:0in .7pt 0in .7pt;width:9.36%;">
    <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="90%" valign="top" style="padding:0in .7pt 0in .7pt;width:90.64%;">
    <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</font></b></p>
    </td>
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    <td width="9%" valign="top" style="padding:0in .7pt 0in .7pt;width:9.36%;">
    <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="90%" valign="top" style="padding:0in .7pt 0in .7pt;width:90.64%;">
    <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;">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" style="font-size:10.0pt;">&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;16, 2008,&nbsp;Dr.&nbsp;Richard N. Nottenburg accepted an offer of
  employment as President and Chief Executive Officer of the Registrant,
  succeeding Hassan M. Ahmed.&#160; Dr.&nbsp;Nottenburg
  is expected to join the Registrant on or before June&nbsp;14, 2008. Dr.&nbsp;Nottenburg
  will also join the Registrant&#146;s Board of Directors. Mr.&nbsp;Ahmed will
  continue to serve as Chairman of the Board of Directors for 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" style="font-size:10.0pt;">&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;">Pursuant to an offer letter
  dated May&nbsp;13, 2008 (the &#147;Employment Agreement&#148;), Dr.&nbsp;Nottenburg will
  receive an initial annual base salary of $500,000. He is eligible for an &#147;on
  target bonus&#148; of at least 80% of his annual base salary subject to the
  achievement of specific objectives. For fiscal year 2008, Dr.&nbsp;Nottenburg
  will be guaranteed a bonus of 80% of his base salary pro rated for the days in
  2008 he is employed by the Registrant.&#160;
  The Registrant will reimburse Dr.&nbsp;Nottenburg for relocation costs
  up to $25,000.</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;">&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;">Shortly following his
  employment commencement date, Dr.&nbsp;Nottenburg will receive an option to
  purchase 500,000 shares of the Registrant&#146;s common stock at an exercise price
  equal to the closing price of the Registrant&#146;s common stock on the NASDAQ
  Global Select Market on the date of grant.&#160;
  Subject to his continued employment, 25% of the shares subject to the
  option will vest on the first anniversary of his commencement date and the
  remaining 75% will vest in equal monthly increments through the fourth
  anniversary of his commencement date. Dr.&nbsp;Nottenburg also will receive,
  shortly following his employment commencement date, 500,000 shares of
  restricted stock that will vest (subject to continued employment) 25% on the
  first anniversary of his commencement date and the remaining 75% in equal
  increments semi-annually through the fourth anniversary of his commencement
  date.</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;">&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;">Subject to his continued
  employment, on January&nbsp;15, 2009, Dr.&nbsp;Nottenburg will receive an
  option to purchase 500,000 shares of the Registrant&#146;s common stock at an
  exercise price equal to the closing price of the Registrant&#146;s common stock on
  the NASDAQ Global Select Market on the date of grant.&#160; Subject to his continued employment, 25% of
  the shares subject to the option will vest on the first anniversary of his
  commencement date and the remaining 75% will vest in equal monthly increments
  through the fourth anniversary of his commencement date. On January&nbsp;15,
  2009, Dr.&nbsp;Nottenburg also will receive 500,000 shares of restricted stock
  that will vest (subject to continued employment) 25% on the first anniversary
  of his commencement date and the remaining 75% in equal increments
  semi-annually through the fourth anniversary of his commencement date.</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;">&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;">Dr.&nbsp;Nottenburg will be
  entitled to two performance stock grants of 250,000 shares each upon the
  Registrant&#146;s achieving certain performance metrics between January&nbsp;1, 2010
  and December&nbsp;31, 2012 as approved by the Compensation Committee of the
  Board of Directors.</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;">&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;">In the event of an
  Acquisition (as defined in the Employment Agreement), 100% of all unvested
  options and restricted stock shall accelerate and become vested.&#160; In addition, the options shall remain
  exercisable for the shorter of five years from the date of Acquisition or the
  original remaining life of the options.</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;">&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;">The Employment Agreement
  also provides that if Dr.&nbsp;Nottenburg is terminated for any reason other
  than Cause (as defined in the Employment Agreement), or is terminated due to
  his death or disability or if Dr.&nbsp;Nottenburg terminates his employment
  with Good Reason (as defined in the Employment Agreement), he will
  receive:&#160; (1)&nbsp;a lump sum payment
  equal to one and one half times his </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;">&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;">&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\brosent\08-14767-1\task2949296\14767-1-ba.htm',USER='brosent',CD='May 19 15:55 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <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;">&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;">&nbsp;</font></p>
  
  <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">then annual base salary and one and a half times his
  then target bonus (or two and a half times his target bonus if the termination
  follows an Acquisition); (2)&nbsp;health benefits continuation at the
  Registrant&#146;s expense for 18 months following his termination; (3)&nbsp;acceleration
  of the vesting of options unvested as of the termination which would have
  vested over the 24 months following termination, provided that if the
  termination occurs prior to January&nbsp;15, 2009, then all unvested options at
  that time will accelerate and fully vest; (4)&nbsp;the right to exercise all
  vested options for the shorter of 5 years from the termination date or the
  original remaining life of the options; and (5)&nbsp;accelerated vesting of all
  unvested restricted shares at the time of termination.</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;">&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;">Dr.&nbsp;Nottenburg is an
  employee-at-will.</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;">&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;">The foregoing summary is qualified in its entirety by reference to the
  Employment Agreement, a copy of which is attached as Exhibit&nbsp;10.1 to this
  Current Report on Form&nbsp;8-K and incorporated herein by reference.</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;">&nbsp;</font></p>
  
  <p style="color:black;margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">Dr.&nbsp;Nottenburg, age 54, has been the Executive Vice President, Chief Strategy&nbsp;&amp; Technology Officer of Motorola,&nbsp;Inc., a communications company, since 2003.&#160; From 1995 to 2003, Dr.&nbsp;Nottenburg was President and Chief Executive Officer of Multilink Technology Corporation, a provider of advanced mixed-signal and VLSI solutions, which merged with Vitesse Semiconductor Corporation in 2003.</font></p><p style="color:black;margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">&nbsp;</font></p>
  
  <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 9.01. Financial Statements and Exhibits.</font></b></p>
  
  <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>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="6%" valign="top" style="padding:0in .7pt 0in .7pt;width:6.94%;">
    <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="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.42%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)</font></p>
    </td>
    <td width="89%" colspan="3" valign="top" style="padding:0in .7pt 0in .7pt;width:89.64%;">
    <p style="color:windowtext;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Exhibits</font></p>
    </td>
   </tr>
   <tr>
    <td width="6%" valign="top" style="padding:0in .7pt 0in .7pt;width:6.94%;">
    <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>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.42%;">
    <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>
    <td width="89%" colspan="3" valign="top" style="padding:0in .7pt 0in .7pt;width:89.64%;">
    <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="6%" valign="top" style="padding:0in .7pt 0in .7pt;width:6.94%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.42%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.22%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">10.1</font></p>
    </td>
    <td width="1%" valign="top" style="padding:0in .7pt 0in .7pt;width:1.24%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="84%" valign="top" style="padding:0in .7pt 0in .7pt;width:84.16%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Employment Agreement between
    Sonus Networks,&nbsp;Inc. and Richard J. Nottenburg accepted on May&nbsp;16,
    2008.</font></p>
    </td>
   </tr>
   <tr>
    <td width="6%" valign="top" style="padding:0in .7pt 0in .7pt;width:6.94%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.42%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.22%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="1%" valign="top" style="padding:0in .7pt 0in .7pt;width:1.24%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="84%" valign="top" style="padding:0in .7pt 0in .7pt;width:84.16%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="6%" valign="top" style="padding:0in .7pt 0in .7pt;width:6.94%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.42%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in .7pt 0in .7pt;width:4.22%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">99.1</font></p>
    </td>
    <td width="1%" valign="top" style="padding:0in .7pt 0in .7pt;width:1.24%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="84%" valign="top" style="padding:0in .7pt 0in .7pt;width:84.16%;">
    <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Press release of Sonus
    Networks,&nbsp;Inc. dated May&nbsp;20, 2008 announcing employment of Chief
    Executive Officer and President</font><font size="2" style="font-size:10.0pt;">.</font></p>
    </td>
   </tr>
  </table>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt 1.5in;page-break-after:auto;text-indent:-.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>
  
  <div style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='3',FILE='C:\JMS\brosent\08-14767-1\task2949296\14767-1-ba.htm',USER='brosent',CD='May 19 15:55 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt 1.5in;page-break-after:auto;text-indent:-.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt 1.5in;page-break-after:auto;text-indent:-.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <h1 style="color:windowtext;font-weight:bold;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;page-break-after:avoid;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:avoid;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&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="font-size:10.0pt;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="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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;20, 2008</font></p>
    </td>
    <td width="53%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:53.66%;">
    <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;letter-spacing:-.1pt;">SONUS NETWORKS,&nbsp;INC.</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.24%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.42%;">
    <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="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.24%;">
    <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;">&nbsp;</font></b></p>
    </td>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.42%;">
    <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="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.24%;">
    <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>
    <td width="50%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:50.42%;">
    <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="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.24%;">
    <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="50%" valign="top" style="border:none;padding:0in .7pt 0in .7pt;width:50.42%;">
    <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>
   <tr>
    <td width="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.34%;">
    <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="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.24%;">
    <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="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.42%;">
    <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>
    </td>
   </tr>
  </table>
  
  <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>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4</font></p>
  
  <div style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
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  <!-- SEQ.=1,FOLIO='4',FILE='C:\JMS\brosent\08-14767-1\task2949296\14767-1-ba.htm',USER='brosent',CD='May 19 15:55 2008' -->
  
  
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  <div style="font-family:Times New Roman;">
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Exhibit&nbsp;Index</font></b></p>
  
  <p align="center" style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt .5in;page-break-after:auto;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">10.1</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Employment
  Agreement</font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;"> between Sonus Networks,&nbsp;Inc. and Richard J. Nottenburg accepted
  on May&nbsp;16, 2008.</font></b></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt .5in;page-break-after:auto;text-indent:-.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt .5in;page-break-after:auto;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">99.1</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Press
  release of Sonus Networks,&nbsp;Inc. dated May&nbsp;20, 2008 announcing
  employment of Chief Executive Officer and President</font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">.</font></b></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt .5in;page-break-after:auto;text-indent:-.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="color:windowtext;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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metadata_filer: {"company-data": {"conformed-name": "SONUS NETWORKS INC", "cik": "0001105472", "assigned-sic": "7373", "irs-number": "043387074", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-30229", "film-number": "08847208"}, "business-address": {"street1": "7 TECHNOLOGY PARK DRIVE", "city": "WESTFORD", "state": "MA", "zip": "01886", "phone": "9786148100"}, "mail-address": {"street1": "7 TECHNOLOGY PARK DRIVE", "city": "WESTFORD", "state": "MA", "zip": "01886"}}
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 16, 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
  (Commission File Number)
  (IRS Employer
  of Incorporation)
  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 16, 2008, Dr. Richard N. Nottenburg accepted an offer of
  employment as President and Chief Executive Officer of the Registrant,
  succeeding Hassan M. Ahmed.  Dr. Nottenburg
  is expected to join the Registrant on or before June 14, 2008. Dr. Nottenburg
  will also join the Registrant's Board of Directors. Mr. Ahmed will
  continue to serve as Chairman of the Board of Directors for the Registrant.
  Pursuant to an offer letter
  dated May 13, 2008 (the "Employment Agreement"), Dr. Nottenburg will
  receive an initial annual base salary of $500,000. He is eligible for an "on
  target bonus" of at least 80% of his annual base salary subject to the
  achievement of specific objectives. For fiscal year 2008, Dr. Nottenburg
  will be guaranteed a bonus of 80% of his base salary pro rated for the days in
  2008 he is employed by the Registrant. 
  The Registrant will reimburse Dr. Nottenburg for relocation costs
  up to $25,000.
  Shortly following his
  employment commencement date, Dr. Nottenburg will receive an option to
  purchase 500,000 shares of the Registrant's common stock at an exercise price
  equal to the closing price of the Registrant's common stock on the NASDAQ
  Global Select Market on the date of grant. 
  Subject to his continued employment, 25% of the shares subject to the
  option will vest on the first anniversary of his commencement date and the
  remaining 75% will vest in equal monthly increments through the fourth
  anniversary of his commencement date. Dr. Nottenburg also will receive,
  shortly following his employment commencement date, 500,000 shares of
  restricted stock that will vest (subject to continued employment) 25% on the
  first anniversary of his commencement date and the remaining 75% in equal
  increments semi-annually through the fourth anniversary of his commencement
  date.
  Subject to his continued
  employment, on January 15, 2009, Dr. Nottenburg will receive an
  option to purchase 500,000 shares of the Registrant's common stock at an
  exercise price equal to the closing price of the Registrant's common stock on
  the NASDAQ Global Select Market on the date of grant.  Subject to his continued employment, 25% of
  the shares subject to the option will vest on the first anniversary of his
  commencement date and the remaining 75% will vest in equal monthly increments
  through the fourth anniversary of his commencement date. On January 15,
  2009, Dr. Nottenburg also will receive 500,000 shares of restricted stock
  that will vest (subject to continued employment) 25% on the first anniversary
  of his commencement date and the remaining 75% in equal increments
  semi-annually through the fourth anniversary of his commencement date.
  Dr. Nottenburg will be
  entitled to two performance stock grants of 250,000 shares each upon the
  Registrant's achieving certain performance metrics between January 1, 2010
  and December 31, 2012 as approved by the Compensation Committee of the
  Board of Directors.
  In the event of an
  Acquisition (as defined in the Employment Agreement), 100% of all unvested
  options and restricted stock shall accelerate and become vested.  In addition, the options shall remain
  exercisable for the shorter of five years from the date of Acquisition or the
  original remaining life of the options.
  The Employment Agreement
  also provides that if Dr. Nottenburg is terminated for any reason other
  than Cause (as defined in the Employment Agreement), or is terminated due to
  his death or disability or if Dr. Nottenburg terminates his employment
  with Good Reason (as defined in the Employment Agreement), he will
  receive:  (1) a lump sum payment
  equal to one and one half times his
  2
  then annual base salary and one and a half times his
  then target bonus (or two and a half times his target bonus if the termination
  follows an Acquisition); (2) health benefits continuation at the
  Registrant's expense for 18 months following his termination; (3) acceleration
  of the vesting of options unvested as of the termination which would have
  vested over the 24 months following termination, provided that if the
  termination occurs prior to January 15, 2009, then all unvested options at
  that time will accelerate and fully vest; (4) the right to exercise all
  vested options for the shorter of 5 years from the termination date or the
  original remaining life of the options; and (5) accelerated vesting of all
  unvested restricted shares at the time of termination.
  Dr. Nottenburg is an
  employee-at-will.
  The foregoing summary is qualified in its entirety by reference to the
  Employment Agreement, a copy of which is attached as Exhibit 10.1 to this
  Current Report on Form 8-K and incorporated herein by reference.
  Dr. Nottenburg, age 54, has been the Executive Vice President, Chief Strategy & Technology Officer of Motorola, Inc., a communications company, since 2003.  From 1995 to 2003, Dr. Nottenburg was President and Chief Executive Officer of Multilink Technology Corporation, a provider of advanced mixed-signal and VLSI solutions, which merged with Vitesse Semiconductor Corporation in 2003.
  Item 9.01. Financial Statements and Exhibits.
  (d)
  Exhibits
  10.1
  Employment Agreement between
    Sonus Networks, Inc. and Richard J. Nottenburg accepted on May 16,
    2008.
  99.1
  Press release of Sonus
    Networks, Inc. dated May 20, 2008 announcing employment of Chief
    Executive Officer and President
  .
  3
  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 20, 2008
  SONUS NETWORKS, INC.
  By:
  /s/ Charles J. Gray
  Charles J. Gray
  Vice President and General Counsel
  4
  Exhibit Index
  10.1
  Employment
  Agreement
  between Sonus Networks, Inc. and Richard J. Nottenburg accepted
  on May 16, 2008.
  99.1
  Press
  release of Sonus Networks, Inc. dated May 20, 2008 announcing
  employment of Chief Executive Officer and President
  .