CHELMSFORD, Mass., and BOSTON -- Today at the Fall VON 2005 Conference, Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider voice over IP (VoIP) infrastructure solutions, announced that it is showcasing its voice over wireless broadband capabilities with Motorola, a global leader in the wireless communications and mobility industry. Sonus is demonstrating its wireless VoBB solution using Motorola's Canopy(TM) wireless broadband system to highlight how service providers globally can deliver the benefits of VoIP over a wireless broadband platform. In its booth (#708), Sonus is conducting live demonstrations of Voice over pre-WiMAX services using the GSX(TM) family, the ASX(TM) Access Server, PSX(TM) Call Routing Server, SGX(TM) Signaling Gateway and Motorola's Canopy wireless broadband system.

"Voice over wireless broadband offers consumers and network operators alike an extraordinary value proposition. It eliminates the expensive infrastructure costs associated with establishing last-mile, wired connectivity to the home, while giving consumers access to reliable, high speed, robust voice and data services," said Hassan Ahmed, chairman and CEO of Sonus Networks. "In addition, by leveraging an IMS-based core voice over broadband network architecture, service providers have a unique platform that not only allows a differentiated consumer experience today, but also establishes a framework for future services based on fixed-mobile convergence."

The convergence of two industry trends is driving the demand for voice over wireless broadband services. First, driven by cost-effective pricing plans and enhanced features, both consumers and enterprises globally are continuing to adopt VoIP for their primary communication service. At the same time, WiMAX is growing in popularity as a key broadband access technology for businesses, residences and public areas. Delivering voice services over WiMAX networks is a natural extension of the Sonus VoBB solution. By deploying Sonus' VoBB solutions and the Motorola Canopy transport infrastructure, service providers are able to architect a carrier class network that meets the growing demand for fixed and mobile wireless broadband services. Available for deployment today, the Sonus wireless VoBB solution is ideally suited for Internet Service Providers (ISPs) and other network operators aiming to enter the rapidly growing wireless services market.

"Carriers, ISPs, and enterprises are eagerly embracing wireless solutions to address rapid network deployment needs, particularly in those areas where building physical connections are expensive or challenging. The Canopy platform is designed to deliver cost-effective, reliable and high-speed Internet access in a wireless environment," said Tom Gruba, director of marketing for Motorola's Canopy wireless broadband business. "Motorola is committed to demonstrating the power of voice over wireless broadband by ensuring that it works seamlessly with solutions offered by companies like Sonus Networks."

Sonus' VoBB solution delivers basic local area calling features as well as advanced IP-based functionality over broadband technologies, providing a lower-cost and flexible alternative for residential and enterprise telephone services. Features and services provided include caller ID, call waiting, 3-way calling, call hold, voicemail, unified messaging and more. Motorola's Canopy solutions include point-to-point and point-to-multipoint configurations that can span distances up to 15 miles in a multipoint configuration and up to 40 miles in a Point-to-Point configuration. Extending the reach of the Sonus VoBB solution with wireless broadband, network operators can increase market opportunities to offer consumers innovative next-generation services with cost effective pricing structure.

"Broadband wireless will be critical in markets worldwide, making it economically feasible for network operators to move into new markets and make broadband more ubiquitous. The result, however, will be increased competition throughout the broadband industry, and network operators will have to employ new approaches to distinguish themselves in the market," said Lindsay Schroth, Senior Analyst with The Yankee Group. "Voice over broadband wireless powered by two industry front-runners like Motorola and Sonus could be a strategic way for network operators to set themselves apart and win favor with end-users."

Sonus Networks Inc.