One Number, One Voicemail, One Call A Reality Demonstrated At CTIA 2008

Sonus Networks, Inc. and ip.access are answering the demands of mobile subscribers for an integrated approach to voice communication and opening up new revenue opportunities for both mobile and wireline operators through fixed mobile convergence.

At CTIA 2008, Sonus Networks and ip.access will be demonstrating a complete broadband mobile convergence solution that combines the Sonus mobilEdge™ Wireless Access Node with ip.access’ Oyster 3G™ femtocells and nanoGSM® 2G picocells. The solution integrates cell phones into enterprise communications systems for business customers, and supports innovative “connected home” features for home users. The complete network will be shown live at this year’s CTIA conference in Las Vegas, USA, Booth #3439. Visitors to Sonus Networks’ booth will experience first-hand wireless calls through ip.access picocells and femtocells via the mobilEdge SIP/IP core network, including Find-Me-Follow-Me and Extension Dialing services for enterprise picocell applications.

“We now offer a complete solution that allows users to experience a new level of communication services. By leveraging existing broadband, carriers can supply high capacity bandwidth services, realising the promise of triple-play services onto the wireless handset,” said Vikram Saksena, chief technology officer, Sonus Networks. “Together with ip.access, we are helping network operators streamline the delivery of advanced multimedia services, providing an improved communication experience for enterprise customers.”

“A robust wireless network requires the seamless interoperability of carrier-class, high- performance solutions,” said Stephen Mallinson, CEO of ip.access. “By integrating Sonus’ mobilEdge Wireless Access Node with our Oyster 3G and nanoGSM indoor radio solutions, we can provide network operators with a fully distributed network architecture that delivers valuable new services to existing handsets.”

Sonus Networks and ip.access have partnered in order to ensure that their technology is integrated and interoperable. By deploying the complete, standards-based network solution, mobile operators can now offer residential and business customers the full power of indoor mobile coverage over existing handset and broadband connections, seamless handover to the macro-mobile network, and a complete suite of residential or business value-added services.

“This solution blends fixed and mobile services into a seamless experience for the end user. Wireless carriers can now offer fully integrated services to business users as well as unlimited long distance wireless services to residential users. We are taking the guesswork involved with interoperability out of the equation,” concluded Saksena.

The solution is available to customers today.

For more information, please visit their website: http://www.sonusnet.com and

http://www.ipaccess.com

About ip.access

Based in Cambridge, UK, ip.access ltd the market leading manufacturer of cost-effective picocell and femtocell infrastructure solutions for GSM, GPRS, EDGE and 3G. These solutions bring IP and cellular technologies together and solve in-building access problems for mobile operators, opening up new revenue streams while defending existing business.

ip.access is the company behind the Oyster 3G™ femtocell, winner of numerous industry awards including the Best Radio Access Product at the 2007 Global Mobile Awards. The Oyster 3G dramatically increases 3G cell capacity and coverage; improves quality of experience; and drives down costs. Oyster 3G is ready for today’s mobile networks and tomorrow’s IMS infrastructure.

The ip.access nanoGSM® is the world’s most deployed picocell solution for cellular networks. It provides GSM, GPRS and EDGE coverage and capacity for offices, shops and using satellite backhaul passenger aircraft, ships and in remote rural areas.

With more than 30 live networks around the world and many more being deployed, ip.access is the partner of choice for operators competing in the new converged marketplace.

ip.access counts Scottish Equity Partners, Rothschild Gestion, Intel Capital, Amadeus Capital Partners, ADC, Cisco and Motorola Ventures among its shareholders.

About Sonus Networks

Sonus Networks, Inc., Nasdaq: SONS, is the market leader 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.

For more information, please visit their website: http://www.sonusnet.com