WESTFORD, Mass. , December 1, 2011 – Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation IP-based network solutions, today announced that Raymond P. Dolan , the Company's President and Chief Executive Officer, and Moe Castonguay, Senior Vice President and Chief Financial Officer, are scheduled to speak at the Credit Suisse 2011 Annual Technology Conference in Scottsdale, AZ on Thursday, December 1, 2011. The fireside chat will be webcast live beginning at approximately 12:00 p.m. Eastern Time (10:00 a.m. Mountain Time) . Interested parties can access the webcast live on Sonus Networks website at http://investors.sonusnet.com/events.cfm . The discussion will be available for replay for a minimum of 60 days.

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 and the Sonus in Session blog.

Important Information Regarding Forward-Looking Statements

This release may contain forward-looking statements (within the meaning of the Private Securities Litigation Reform Act) regarding future events that involve risks and uncertainties. Forward-looking statements can be identified by words such as "anticipates," "intends," "plans," "seeks," "believes," "estimates," "outlook," and "expectations" and similar references to future periods. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results. Such forward-looking statements may relate to, among others, expected financial and operating results, expected growth rates, future stock-based compensation and amortization expenses, future business prospects and market conditions. Such forward-looking statements do not constitute guarantees of future performance and are subject to a variety of risks and uncertainties that could cause actual results to differ materially from those anticipated. These include, but are not limited to: the timing of the Company's recognition of revenues; the ability to recruit and retain key personnel; difficulties supporting our new strategic focus on channel sales; difficulties expanding the Company's customer base; difficulties leveraging market opportunities; difficulties providing solutions that meet the needs of customers; market acceptance of the Company's products and services; rapid technological and market change; the ability to protect intellectual property rights; the ability to maintain partner, reseller, distribution and vendor support and supply relationships; higher risks in international operations and markets; the ability to hire and retain employees; the impact of increased competition; currency fluctuations; litigation; changes in the market price of the Company's common stock; actions taken by significant stockholders; failure or circumvention of the Company's controls and procedures; and other risks and uncertainties described more fully in documents filed with or furnished to the Securities and Exchange Commission by the Company, including in Item 1A - "Risk Factors" of our Annual Report on Form 10-K and subsequent quarterly reports on Form 10-Q. 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:

Patti Leahy
978-614-8440
pleahy@sonusnet.com

Moe Castonguay
978-614-8200
mcastonguay@sonusnet.com