Sonus Networks and PCTEL Announce a Strategic Agreement to Advance Broadband Mobile Convergence Solutions


Joint Solution Enables Broadband Mobile Convergence for Dual Mode Handsets

WESTFORD, Mass. and CHICAGO, June 20 / -- Sonus Networks, Inc. (NASDAQ:SONS), a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, announced today at NXTcomm 2007 (Booth#4215) that the company entered into an agreement with PCTEL, Inc. (NASDAQ:PCTI), an industry leading supplier of IMS-ready Fixed Mobile Convergence (FMC) client software for converged devices. Under the agreement, the companies completed interoperability testing between the customized PCTEL Roaming Client - Voice Enabled (VE) solution and the Sonus Broadband-Mobile Convergence (BMC) solution. The joint solution will enable the seamless handoff of mobile calls between Wireless Local Area Networks (WLANs) and traditional cellular networks and delivery of broadband-mobile converged services through dual mode handsets. The combined solution is now available to carriers worldwide.

Sonus' BMC solution is IP Multimedia Subsystem (IMS)-ready and is based on standard protocols as defined by the 3rd Generation Partnership Project (3GPP). The solution includes the Sonus IMX Multimedia Application platform and third-party solutions such as those from PCTEL. Interoperable with both second-generation (2G) and third-generation (3G) mobile networks, the PCTEL and Sonus solution allows network operators to deliver converged services across wireline or wireless, business or personal network connections. PCTEL's Roaming Client - VE delivers advanced voice and messaging capabilities, including seamless roaming and in-call handoff capabilities on dual mode devices. It enables users to seamlessly roam between and connect to the highest bandwidth, lowest cost source of connectivity at any location including enterprise networks, Wi-Fi Hot Spots and cellular networks. PCTEL's Roaming Client - VE has been deployed in over 25 trial sites worldwide and has been integrated with native cellular phone applications on several leading handset platforms including Windows Mobile®.

"PCTEL's Roaming Client Software is being embraced by some of the world's largest network operators and Wi-Fi service providers to deliver seamless mobility between Wi-Fi and cellular networks," said Biju Nair, Corporate Vice President and General Manager of PCTEL's Mobility Solutions Group. "Coupling the power of PCTEL client software with the world-class Sonus core infrastructure provides important new revenue opportunities for our customers, and enables them to advance the time to market to deliver converged services."

"The progress in the development of robust dual mode handsets has accelerated the demand for network architectures that support the delivery of converged voice, data and multimedia services over wireless data networks and traditional cellular networks," said Vikram Saksena, chief technology officer, Sonus Networks. "We are delighted to work with PCTEL, the industry's most innovative provider of client-side software solution for converged devices, to streamline the rapid rollout of new services that take advantage of the robust capabilities and efficiency of wireless IP solutions."

About PCTEL
PCTEL, Inc. (NASDAQ:PCTI), which is headquartered in Chicago, is a global leader in wireless broadband solutions. The company's Broadband Technology Group (BTG) includes Antenna Products and RF Solutions. PCTEL's BTG designs, distributes, and supports innovative antenna solutions for public safety applications, unlicensed and licensed wireless broadband, fleet management, network timing, and other GPS applications. Its portfolio of OEM receivers, receiver based products and interference management solutions are used to measure, monitor and optimize cellular networks. PCTEL's Mobility Solutions' software tools provide secure, access independent, remote connectivity to the Internet and IMS software for converged handsets.

The company's products are sold or licensed to wireless carriers, wireless ISPs, distributors, system integrators, wireless test and measurement companies, wireless network equipment, handset manufacturers, and government agencies. PCTEL protects its technology with a strong intellectual property portfolio and broad cross-licensing agreements. For more information, please visit the company's web site at: http://www.pctel.com/.

About Sonus Networks
Sonus Networks, Inc. is a leading provider of voice over IP (VoIP) 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. Additional information on Sonus is available at http://www.sonusnet.com/.

For more information, please contact:
Media Relations:
Sarah McAuley
978-614-8745
smcauley@sonusnet.com

PCTEL Media Relations
Jack Seller
773-243-3016
jack.seller@pctel.com

Source: Sonus Networks, Inc. and NeuStar, Inc.

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