Sonus Networks Chairman and CEO Hassan Ahmed to Deliver Keynote Address

CHELMSFORD, Mass., August 31, 2006 – Sonus Networks (Nasdaq: SONS), a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, announced that at this year's Fall 2006 Voice on the Net (VON) Conference and Expo, the Company will showcase its industry-leading IP Multimedia Subsystem (IMS)-ready platform, along with a variety of IMS-ready applications that demonstrate the power of IMS to redefine the communications experience through greater user control, customizability, presence-awareness and the rich integration of multimedia. These applications, built with Sonus' IMS application development tools, including the Sonus IMX™ Multimedia Application Platform, help service providers to attract and retain new customers, and differentiate themselves through innovative service bundles.

In addition to Sonus' presence in the exhibit hall, Sonus CEO Hassan Ahmed will be delivering a conference keynote, and executives from the company will present on various topics that are top of mind in today's telecommunications industry. Sonus speakers and topics scheduled to appear at the Fall VON 2006 conference include:

Wednesday, September 13, 2006, 12:30 pm - 1:00 pm
Keynote Address: Hassan Ahmed, Chairman and CEO, Sonus Networks

Wednesday, September 13, 2006, 1:30 pm - 2:45 pm
Session: Pre- and Post-Deployment Challenges of IMS
Speaker: Vikram Saksena, Vice President and Chief Architect, Sonus Networks

Wednesday, September 13, 2006, 1:30 pm - 2:45 pm
Session: 10 Years of IP-Voice, Stage 2: Somebody Bit the Apple
Speaker: Rubin Gruber, Founder, Sonus Networks

Wednesday, September 13, 2006, 2:45 pm - 3:45 pm
Session: Accelerating Awareness and Adoption of Internet Voice Services
Speaker: Steve Edwards, Chief Marketing Officer, Sonus Networks

Pulver.com's VON Fall 2006 conference begins on Monday, September 11, 2006 and will conclude on Thursday, September 14, 2006. All events will be held at Boston Convention and Exhibition Center. Fall VON 2006 is the leading conference and exhibition for the IP communications industry and is attended by carriers, service providers, mobile operators and vendors.

For more information on VON Fall 2006, please visit www.pulver.com/von.

About Sonus Networks

Sonus Networks, Inc. is a leading provider of Voice over IP (VoIP) 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 Chelmsford, 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 the “Risk Factors” section of Sonus' Quarterly Report on Form 10-Q, dated May 8, 2006, filed with the Securities and Exchange Commission, 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 announced review of its historical stock option grants and accounting, including any potential impact of the Company's financial statements or results, the Company's inability to timely report with the Securities and Exchange Commission, the Company's potential inability to meet NASDAQ requirements for continued listing, potential investigations or litigation arising out of the review or any restatement; 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.

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