Sonus Networks Gains Footprint in the Middle East by Powering End to End Hosted VOIP Solution at Gateway Gulf

Leading Managed Services Provider In The Middle East Chooses Sonus Networks For Providing Turnkey VoIP Interconnect and Subscriber Services

WESTFORD, MA, May 3, 2010 – Sonus Networks, Inc. (Nasdaq: SONS), providing network transformation through IP communications technology, today announced that Gateway Gulf, a leading provider of managed data network and internet exchange services in the Middle East, has chosen Sonus to deliver its core IP voice interconnectivity and CLASS 5 consumer and business VoIP services. This is the first major win for Sonus in the region. The Sonus solution will be deployed across the Middle East, starting with Bahrain.

“Gateway Gulf is a well recognized name in the region, and continues to grow and expand into new geographies in the emerging market,” commented Mohammed Shanableh, vice president, worldwide sales for Sonus Networks. “We are extremely pleased that they have chosen Sonus for their complete VoIP service offering, as this represents a new geographical presence for Sonus.”

Gateway Gulf is the leading provider of High Tier Data Centers, hosting Internet Exchanges, Teleport, Cloud Computing Platform and managed services in the Middle East with presence in multiple countries. By adopting a unique business model that focuses on carrier neutrality and integrating a core set of offerings in its mission critical facilities in the region, Gateway Gulf catalyzes businesses and economies in the developing world.

“Our aim is to bring the revolutionary benefits of connectivity enjoyed by the developed world to emerging markets and we emphasize open access and peering agreements for all customers. By adding the turn-key VoIP peering and access solutions from Sonus, we hope to add SIP Trunking, VoIP interconnect and subscriber feature services to our customers in the entire emerging market,” commented Mr. Tariq Husain, Chairman of Gateway Gulf. “Scalability and manageability of the solution are key metrics for us when selecting a vendor, given the rapid growth enjoyed by the region and Sonus stood out as the one that could provide a complete, end to end offering while permitting ease of operations.”

Gateway Gulf will deploy the Sonus GSX9000™ Media Gateway, the Sonus PSX™ Call Routing and Policy Server and the Sonus Network Border Switch (NBS9000) for SIP Trunking, advanced VoIP peering and transcoding capabilities. In addition, the Sonus ASX feature server will be deployed to offer hosted CLASS 5 consumer and business features, and the entire solution will be managed by the Sonus Insight™ Element Management System.

About Gateway Gulf

Gateway Gulf offers world-class teleport and secure colocation services to Africa, the Near East, and the Middle East and is the first provider connecting these regions to the rest of the world. The company boasts a global network-neutral data center and carrier-neutral Internet exchange services, offering safe and reliable information storage. Gateway Gulf uses the latest in peering network technology, providing cost-effective services that are unrivaled in convenience, capacity, flexibility, and reliability. Its primary customer base includes global carriers, ISPs, Internet-related businesses, educational and government institutions, and enterprises. Gateway Gulf is headquartered in Manama, Kingdom of Bahrain.

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.sonus.net.

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, which identifies 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:

Aashu Virmani
978-614-8795
avirmani@sonusnet.com