Sonus Networks Announces a Worldwide Reseller Agreement with Iperia

Partnership Will Increase Market Penetration in Carrier and Enterprise Networks by Providing Applications for Unified Communications

Westford, MA, October 5, 2010 — Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation IP-based network solutions, and Iperia, a leading provider of mobile applications and content delivery, today announced an agreement aimed at meeting the growing demand for next-generation messaging applications. Partnering with Iperia will add value to Sonus products through the IperiaVX platform and the company’s rich suite of unified messaging applications.

Under the terms of the agreement, Sonus will act as a reseller of Iperia’s complete product portfolio, which includes the IperiaVX and all of its applications, both wireline and wireless. Sonus will also provide systems integration as well as support services globally.

"The combination of Sonus' market-leading VoIP and session management portfolio and Iperia’s best-in-class unified messaging solutions enables us to deliver more robust solutions to our customers," said David Tipping, vice president of worldwide systems engineering and marketing for Sonus Networks. “This is a great addition to our existing portfolio, given our in-depth knowledge of and expertise in delivering and supporting unified communication solutions. This alliance creates a win-win situation for both companies, and we look forward to sharing the market expansion with Iperia."

The partnership will enable Sonus to deliver a rich suite of unified messaging applications with its ASX Telephony Application Server. With IperiaVX, Sonus customers will be able to deliver any messaging content to any end user device. This will enable Sonus customers to proactively plan or react to market demand and not be hindered by rigid and proprietary systems. The advanced capabilities of Sonus ASX and IperiaVX will bring enhanced services to end users, including voice messaging, mobile messaging, auto attendant, fax, and conferencing services.

"I am very excited about the ability to work with Sonus and bring unified messaging solutions to the marketplace," stated Sam Waicberg, CEO of Iperia. "This partnership will clearly provide the best of both worlds, delivering unmatched capabilities to our new customers."

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.sonusnet.com.

About Iperia
Iperia is a leading provider of mobile applications and content delivery for service providers and enterprises. The company’s flagship product, IperiaVX, is a next-generation service delivery platform that powers value added applications consisting of mobile, voice, video, conferencing, and web messaging suites delivered either on-premise or as a cloud-based solution. Established in 1997, Iperia’s products are deployed globally and have a worldwide network of distribution partners. For more information about Iperia, please visit www.Iperia.com.

For More Information please contact:

Aline Kaplan - Sonus Networks at 978 614 8167 or alkaplan@sonusnet.com

Paul Roberts - Sonus Networks at 781 418 2418 or sonus@daviesmurphy.com

Marie Browning - Iperia at 781 839 3950 or mbrowning@iperia.com

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