European Competitive Telecommunications Association

BARCELONA, Spain and WESTFORD, Mass., February 13, 2008 – Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider IP-voice infrastructure solutions, today announced the latest release of its industry-leading software platform. Sonus Release 7.1 delivers a new level of IP-voice capabilities, further leveraging Sonus’ field-proven distributed architecture for growth markets such as wireless, business services and emerging geographies.

Sonus Release 7.1 solves many of the challenges for operators in Eastern Europe, Russia and Southeast Asia through signaling and regulatory support that these operators must deliver, including local number portability and lawful intercept enhancements. This latest software platform reduces capital and operating costs with new voice codec support to efficiently combine mobile and fixed line traffic.

“Sonus’ complete portfolio of solutions is already enabling the world’s largest service providers to transform their networks. Sonus’ latest enhancements give service providers across the globe the tools required to create new and innovative solutions, enabling them to redefine the services and business models they offer end-users,” said Hassan Ahmed, Chairman, President and CEO of Sonus Networks. “This same Sonus portfolio delivers services across rapidly growing WiMAX networks; providing access in emerging markets that were traditionally underserved. Wired or wireless, Sonus continues to create opportunities for operational improvements in provider’s networks worldwide, making the delivery of their solutions more cost effective.”

The new Sonus Release 7.1 suite includes over 100 enhancements to its IP wireline and wireless solutions, including:

  • Integrated EFR (Enhanced Full Rate) and AMR (Adaptive Multi-Rate) vocoder functions to support global wireless traffic patterns;
  • Robust additions to business services capabilities to better support SIP phones and IADS;
  • Number portability compliance solutions featuring ENUM support & INAP additions;
  • 83% density improvements in transcoding;
  • IMS/3GPP R7-compliant solutions that allow carriers in emerging countries to deploy advanced services for WiMAX and broadband Next-Gen Networks.

Leveraging Sonus’ experience with millions of residential users, Sonus’ Release 7.1 enhances business customers’ capabilities to connect industry standard SIP phones and IADs to a service provider’s network. Business customers gain enhanced access to PBX-type features while saving thousands of dollars in upfront investment. Traditional premise-based PBX equipment can also be connected with Sonus’ SIP-based IP Business Trunks. Sonus solutions allow business users to move calls seamlessly between locations or between wired and mobile devices.

"Operators seek to invest in flexible platforms which can support a range of services, most importantly voice today but migrating to a full range of multimedia services over IP over time," said Brian Partridge, Enabling Technologies Program Manager with Yankee Group. “Sonus is well positioned to help customers accelerate this migration to IP-voice globally while providing investment protection for future service offerings.”

Sonus Release 7.1 is available now with new product shipments and as a software upgrade for customers with SonusCARESM support and service contracts.


About Sonus Networks 
Sonus Networks, Inc. is a leading provider of IP voice network solutions for wireline, wireless and cable providers. Sonus’ IP Multimedia Subsystem (IMS) solution addresses the full range of carrier applications: residential and business voice services, wireless voice and multimedia, trunking and tandem switching, carrier interconnection and enhanced services. Sonus’ voice solutions are deployed in service provider networks worldwide. Founded in 1997, Sonus is headquartered in Westford, Massachusetts. Additional information on Sonus is available at

For more information, please contact:
U.S. Media Relations: 
Lucy Millington 
+1 978-614-8240 
This email address is being protected from spambots. You need JavaScript enabled to view it.

Investor Relations: 
Jocelyn Philbrook 
+1 978-614-8672 
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EMEA Media Relations:
Paula Lender-Swain
+44 (0)1793 601453 
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