North American Division of World’s Largest Operator Selects Sonus for IP Interconnect

WESTFORD, Mass., May 9, 2007 - Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, announced today that solutions from Sonus Networks have been chosen as a supplier for France Telecom International Wholesale voice over IP network. France Telecom International Wholesale will deploy Sonus-based solutions in the United States to expand its international voice wholesale services.

“Sonus offers an exceptional value proposition for wholesale providers looking to grow their footprint. For France Telecom’s International Wholesale division, in particular, Sonus’ robust support for international signaling standards and our global presence and support capabilities are especially compelling,” said Hassan Ahmed, chairman and CEO, Sonus Networks.

“France Telecom is extending its global network to leverage the benefits of IP, which include the ability to scale our network and streamline the operations of our North American presence,” said Jean-Marc Escalettes Vice President of France Telecom Wholesale Solutions for the Americas region. “We chose Sonus as our partner because of their established leadership and their ability to build and support proven IP-based voice networks.”

France Telecom International Wholesale network will be comprised of the GSX9000™ Open Services Switch, PSX™ Call Routing Server, SGX™ Signaling Gateway, and the Sonus Insight™ Management System. In addition, they will be deploying the Sonus Network Border Switch for enhanced security and advanced peering capabilities.

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 Westford, Massachusetts. Additional information on Sonus is available at http://www.sonusnet.com.