X0303 4 2010-08-16 0001105472 SONUS NETWORKS INC SONS 0001230525 BREWINGTON JAMES K C/O SONUS NETWORKS, INC. 7 TECHNOLOGY PARK DRIVE WESTFORD MA 01886 1 0 0 0 Common Stock 2010-08-16 4 A 0 5000 0 A 5000 D Stock Option (right to buy) 2.97 2010-08-16 4 A 0 20000 0 A 2020-08-16 Common Stock 20000 20000 D These are restricted shares of Common Stock that vest over a four-year period as follows: 25% will vest on August 16, 2011. The remaining 75% of the shares shall vest in six equal increments semi-annually thereafter. 25% of the shares underlying this option vests on August 16, 2011. The remaining 75% of the shares underlying this option will then vest in equal monthly increments for the following 36 months. James K. Brewington 2010-08-16