X0303 4 2010-08-16 0001105472 SONUS NETWORKS INC SONS 0001490372 Snider Jeffrey M. C/O SONUS NETWORKS, INC. 7 TECHNOLOGY PARK DRIVE WESTFORD MA 01886 0 1 0 0 SVP, General Counsel & Secy Common Stock 2010-08-16 4 M 0 61250 1.94 A 254582 D Common Stock 2010-08-16 4 S 0 61250 2.97 D 193332 D Option (right to buy) 1.94 2010-08-16 4 M 0 61250 0 A 2019-06-15 Common Stock 61250 148750 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.94 to $3.02, inclusive. The reporting person undertakes to provide Sonus Networks, Inc., any security holder of Sonus Networks, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote. 25% of the shares underlying this option vested on June 8, 2010. The remaining 75% of the shares underlying this option will then vest in equal monthly increments for the following 36 months through June 8, 2013. Jeffrey M. Snider 2010-08-17