Sonus Networks Drives Wireless Innovation at GSM Mobile Asia Congress 2007

WESTFORD, Mass., November 7, 2007 – Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider IP-voice infrastructure solutions, announced today that the company will demonstrate its cutting-edge Broadband-Mobile Convergence (BMC) solutions at this year’s Mobile Asia Conference, held November 13-15th at The Venetian Macao Convention, Exhibition & Event Center in Macao, China.

"The opportunities for innovation in wireless represent one of Sonus' strongest and most strategic growth areas. Our ability to couple our industry-leading core IP network architecture with innovative new edge technologies, like pico- and femtocells, has piqued the interest of network operators across the globe," said Vikram Saksena, chief technology officer, Sonus Networks. "Geographically, Asia is one of the biggest potential markets for these types of solutions, and our presence at GSM Mobile Asia enables us to connect with network operators from throughout the region."

Sonus Networks will also be demonstrating a suite of enhanced next generation applications built using Sonus' IMX 2.0 Multimedia Application Platform. This rich application development and support environment enables network operators to transform the end-user experience through the rapid creation of feature rich applications and services. The latest version of IMX 2.0, released in October 2007, includes new support for wireless networks and answers consumer demand for mobility, personalization, and customization of their communications experience.

GSMA Mobile Asia Congress (formerly 3GSM World Congress Asia) is the sister event to Mobile World Congress, Barcelona, the largest, most significant and most successful global mobile event in the world. An estimated 52,000 visitors gathered in Barcelona at this year’s Congress to do business, to discuss the hottest trends in the mobile communications industry, and to participate in its future.

About Sonus Networks

Sonus Networks, Inc. is a leading provider of IP-voice infrastructure solutions for wireline and wireless service providers. With its comprehensive IP Multimedia Subsystem (IMS) solution, Sonus addresses the full range of carrier applications, including residential and business voice services, wireless voice and multimedia, trunking and tandem switching, carrier interconnection and enhanced services. Sonus' voice infrastructure solutions are deployed in service provider networks worldwide. Founded in 1997, Sonus is headquartered in Westford, Massachusetts. Additional information on Sonus is available at http://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' Quarterly Report on Form 10-Q for the period ended June 30, 2007, filed with the SEC, which identifies important risk factors that could cause actual results to differ from those contained in the forward-looking statements. Risk factors include among others: the impact of material weaknesses in our disclosure controls and procedures and our internal control over financial reporting on our ability to report our financial results timely and accurately; the unpredictability of our quarterly financial results; risks and uncertainties associated with the Company's restatement of its historical stock option granting practices and accounting including regulatory actions or litigation; risks associated with our international expansion and growth; consolidation in the telecommunications industry; and potential costs resulting from pending securities litigation against the Company. 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.

The information in this press release is for informational purposes only and is subject to change at Sonus' sole discretion without notice. Sonus has no obligation or commitment to develop or deliver any future release, upgrade, feature, enhancement or function described in this release. The information is provided "AS IS," with all faults, and without any warranties whatsoever, express or implied, including, but not limited to, warranties of merchantability, performance, or fitness for a particular purpose.

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.