Sonus Networks' Connexions 2010 Offers First- Hand View of the Technology Shaping the Future of Communications

"Technology Zone" Demonstrations Highlight Cutting-edge Technology for Border Control and Unified Communications

WESTFORD, Mass., October 12, 2010 – Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation IP-based network solutions, today announced that the Technology Zone at Connexions 2010 will host multiple live demonstrations of how its technology helps service providers and enterprises not only to solve current problems but also to plan for future. The company‟s premier customer and partner meeting will take place October 12-14, 2010, at the Innisbrook Resort and Golf Club in Palm Harbor, Florida.

The event‟s Technology Zone will provide Connexions attendees with hands-on demonstrations of current products and give insight into upcoming features. An associated Partner Pavilion gives Sonus partners the opportunity to demonstrate their own products and illustrate the benefits of deploying combined solutions.

"At Connexions 2010 we are providing our customers and partners with an in-depth and hands-on view of the complete breadth of products and new technologies from Sonus Networks," said Guru Pai, chief operating officer at Sonus Networks. "Our Technology Zone will demonstrate the power of our ConnexIP platform and highlight the company's recent innovations in the areas of high-definition voice, unified communications, and fixed smartphone convergence. The technology on display at Connexions 2010 includes solutions for the industry‟s most immediate needs and also paves the way for tomorrow's solutions."

Demonstrations that will be presented at Connexions 2010 include the following:

High Definition Voice

Sonus will demonstrate how the company‟s technology delivers HD Voice for both end users and service providers. End users experience the benefit of crisp, clear conversations in which nuances are conveyed and second-language speakers can be better understood. HD Voice can also improve text-to-speech applications and speech recognition solutions, ultimately improving customer satisfaction.

Unified Communications

Highlighting the importance of Unified Communications for enterprise markets, Sonus experts will showcase the Enhanced Services Portal (ESP), which brings together chat, presence, voice mail, email, and calling capabilities in one portal. The Enhanced Services Portal improves employee productivity by giving them a single access point to all these applications anywhere, at any time, and through any device. It is a web-based model that improves productivity and lowers operational costs because there is no desktop software to deploy and manage and no IT staff needed to support it.

Voice Security for the Enterprise

Developed using Sonus‟ patent-pending technology, the Voice Security solution from Sonus ensures that enterprises moving to SIP trunking are protected from Vishing, and computer-generated SPAM calls. By blocking rogue calls before they reach the Call Center PBX / ACD, it reduces the excess call volume that drives costly upgrades and it increases customer satisfaction by reducing the hold time. It also improves security by preventing corporate information from being revealed to Vishing attackers on the call center infrastructure.

Network Analytics Solutions

In this demonstration, Sonus will illustrate how „quality‟ has different meanings on IP networks and on VoIP networks. The demonstration will show how Sonus can „actively‟ insert traffic and monitor the QoS/QoE to pinpoint and troubleshoot problem areas in our customers‟ VoIP networks. Other demonstrations will include a simplified view of network performance and historical analysis of network configuration and performance.

Network Border Switch

Sonus' NBS5200™, which is the first product launched on the Sonus ConnexIP platform, delivers unmatched performance in real-world conditions by providing both depth of features and scalability. Sonus will demonstrate five different product benefits: raw performance, transcoding, Xcoding and SMM, encryption and Ipv4 - Ipv6 interworking. By replacing multiple boxes with just one through onboard media services, it reduces costs and saves both call center space and energy. The NBS5200 offers a superior routing and policy engine, either local or central.

IP Multimedia Subsystem (IMS)

Sonus provides a standards-based solution for fixed, cable, mobile and interconnect providers that reduces barriers to IMS deployment and shrinks costs. With extensive functionality in a single box, Sonus‟s linearly scalable deployment architecture allows customers to add capacity at targeted locations.

Fixed Smartphone Convergence

New capabilities in the Sonus Networks ASX Telephony Application Server allow cable operators to provide their subscribers with home phone service that can "share" an existing phone line with up to five additional SIP-enabled devices, including 3G/Wi-Fi enabled smartphones. With the Sonus Fixed - Smartphone Convergence solution in action, live calls coming into a landline phone will ring simultaneously on different devices, including a PC softphone and a SIP-enabled smartphone. Visitors will see how easy it is to answer the call on any of the phones and transfer as necessary,even as other users make outbound calls on other devices.

Partner Demonstrations

Demonstrations in Connexion 2010‟s Partner Pavilion will include:

Oracle: Platinum Sponsor Oracle will highlight the Oracle TimesTen In-Memory Database and the Oracle‟s Sun Netra carrier-grade servers at booth 42. Oracle products are embedded in the solutions of partners like Sonus Networks and other leading communications companies worldwide.

Empirix: Empirix Inc. will provide in-depth information on several of their products: Hammer xCentrix, Hammer G5, Hammer Edge.

Grandstream Networks: Grandstream will showcase their new enterprise HD SIP phones and their popular IP multimedia phones. Additionally, Grandstream will show how their SIP-based IP camera series offers an advanced security surveillance solution that is fully converged with and controlled by an open-standard SIP-based communication system.

Iperia: Iperia will demonstrate Visual Voicemail with Transcription and Mobile Conferencing. These applications work across a wide variety of mobile devices including the Android™, iPhone, and BlackBerry® phones as well as the iPad.

Verint Systems: Verint will present STAR-GATE™, a comprehensive solution portfolio that streamlines service provider compliance with a rapidly expanding array of regulations, standards, and communication technologies. With STAR-GATE, services providers can access communications on virtually any type of network and retain communication data for as long as required.

IBM will also be demonstrating its products and solutions in the partner pavilion.

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.

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 and all subsequent Quarterly Reports on Form 10-Q, which identify 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:

Aline Kaplan
alkaplan@sonusnetworks.com
+1 978-614-8167

Paul Roberts
sonus@daviesmurphy.com
+1 781-418-2418