WESTFORD, Mass., June 3, 2011 – Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation IP-based network solutions, today announced that its Senior Vice President and Chief Technology Officer, Dr. Rajiv Laroia has received the 2011 Inventor of the Year Award by The New York Intellectual Property Law Association (NYIPLA) at the organization's recent annual event and awards dinner held this month in New York.

Each year at the annual meeting of members, NYIPLA presents the Inventor of the Year Award as a tribute to an individual or group of individuals who, through their inventive talents, have made worthwhile contributions to society by promoting "the progress of Science and useful Arts."

Established in 1922, NYIPLA is a bar association principally composed of lawyers interested in patent, trademark and copyright law. The organization currently serves as a vehicle to promote the development and administration of intellectual property interests. Today, NYIPLA exceeds 1500 intellectual property attorneys practicing throughout the United States and abroad.

"Dr. Rajiv Laroia is a tremendously valuable member of the Sonus executive team," said Ray Dolan, President and CEO of Sonus Networks. "We are very proud of all that Dr. Laroia has accomplished, and we congratulate him on being named the Inventor of the Year by a prestigious organization like the New York Intellectual Property Law Association."

About Sonus Networks

Sonus Networks, Inc. is a leader in IP networking with proven expertise in delivering secure, reliable and scalable next-generation infrastructure and subscriber solutions. With customers in over 50 countries across the globe and over a decade of experience in transforming networks to IP, Sonus has enabled service providers and enterprises to capture and retain users and generate significant ROI. Sonus products include media and signaling gateways, policy/routing servers, session border controllers and subscriber feature servers. Sonus products are supported by a global services team with experience in design, deployment and maintenance of some of the world's largest and most complex IP networks. For more information, visit www.sonusnet.com .

This release may contain forward-looking statements regarding future events that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results. Readers are referred to Item 1A "Risk Factors" of Sonus' Annual Report on Form 10-K for the year ended December 31, 2009 and all subsequent Quarterly Reports on Form 10-Q, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. Any forward-looking statements represent Sonus' views only as of today and should not be relied upon as representing Sonus' views as of any subsequent date. While Sonus may elect to update forward-looking statements at some point, Sonus specifically disclaims any obligation to do so, except as required by law.

Sonus is a registered trademark of Sonus Networks, Inc. All other company and product names may be trademarks of the respective companies with which they are associated.

For more information, please contact:

Sonus
Aline Kaplan
alkaplan@sonusnet.com
+1 978-614-8167