January 22, 2008 06:00 ET

Clearwire to Deliver Advanced IP Voice with Nortel Carrier VoIP Technology

Agreement to Provide Residential VoIP Services to Clearwire Network Subscribers

TORONTO, ONTARIO--(Marketwire - Jan. 22, 2008) - Nortel(1) (TSX:NT)(NYSE:NT) has signed a contract with wireless broadband pioneer Clearwire to deliver a complete carrier VoIP solution to provide a residential VoIP service to Clearwire's U.S. customers. Nortel will also provide services to Clearwire from its Global Services portfolio, including network engineering, multi-vendor network integration, network deployment and support.

Clearwire's Internet Phone Service is currently available in 37 of the company's 46 markets in the U.S. and works with their customers' existing high-speed Internet access to provide unlimited local and long-distance calling from a regular telephone. The Nortel solution will provide end-to-end carrier VoIP infrastructure for Clearwire's Internet Phone Service, while laying the foundation for Clearwire to easily evolve their network to potentially deliver converged fixed and mobile services.

"In today's competitive marketplace, new wireless carriers are winning market share by delivering a complete communications package with high-quality services like VoIP," said Richard Lowe, president, Carrier Networks, Nortel. "Nortel's technology will allow Clearwire to stay ahead of the competition to deliver the VoIP services its customers require today, while laying the foundation for advanced multimedia services in the future. Nortel is the world leader in carrier VoIP technology that powers new levels of mobility, collaboration and productivity for users around the globe."

"Clearwire's customers require high quality voice service in addition to the robust broadband data service we provide," said John Saw, chief technology officer, Clearwire. "Nortel's market-leading voice technology best meets Clearwire's current needs while providing a simple migration path for our future voice communication requirements."

Nortel is supplying complete end-to-end carrier VoIP infrastructure and services solution for Clearwire. The solution is based on Nortel's Application Server (AS) 5200 to deliver SIP applications including voice, call management, desktop video calling, collaboration tools, and personalization services. Nortel will also supply its Communication Server 2000, an IP multimedia softswitch that delivers network infrastructure services and supports a wide range of voice and multimedia features based on the open, industry-standard SIP protocol.

Nortel's complete carrier VoIP solution supports the explosion in demand for new communication services being driven by Hyperconnectivity, a global trend where anything that can be connected to the network, will be connected. To address this demand for services and the rapid growth of enterprise and residential subscribers, carriers are using Nortel's VoIP and multimedia service solutions to deploy new communications technologies that converge voice, video and data services onto one network to improve quality of service while reducing costs. They are also using Nortel's Global Services to accelerate cost-effective deployment of these technologies into multi-vendor networks.

Nortel is providing VoIP and multimedia solutions to many of the world's leading service providers, including Bell Canada, Rogers Communications, SaskTel, Telus, Verizon, Embarq, Verizon Business, British Telecom, Cable & Wireless and Neuf Cegetel. According to Dell'Oro Group, Nortel is the worldwide leader in Carrier VoIP and has maintained that position for the last six years (2002 through to the latest reported numbers in 2007). Nortel has deployed its existing SIP applications with more than 100 operators globally and has shipped more than 40 million Carrier VoIP ports.

About Nortel

Nortel is a recognized leader in delivering communications capabilities that make the promise of Business Made Simple a reality for our customers. Our next-generation technologies, for both service provider and enterprise networks, support multimedia and business-critical applications. Nortel's technologies are designed to help eliminate today's barriers to efficiency, speed and performance by simplifying networks and connecting people to the information they need, when they need it. Nortel does business in more than 150 countries around the world. For more information, visit Nortel on the Web at For the latest Nortel news, visit

About Clearwire

Clearwire, founded in October 2003 by telecom pioneer Craig O. McCaw, is a provider of simple, fast, portable and reliable wireless high-speed Internet service. Clearwire customers connect to the Internet using licensed spectrum, thus eliminating the confines of traditional cable or phone lines. Headquartered in Kirkland, Wash., the company launched its first market in August 2004 and now offers service in 16 states across the U.S. as well as in Europe and Mexico. For more information, visit

Forward Looking Statements

This release contains forward-looking statements which are based on current expectations and beliefs, as well as on a number of assumptions concerning future events made with information that is currently available. Forward-looking statements may include, without limitations expectations regarding: future financial and operating performance and financial condition; plans, objectives and strategies; product development; and industry conditions. Readers are cautioned not to put undue reliance on such forward-looking statements, which are not a guarantee of performance and are subject to a number of uncertainties and other factors, many of which are outside of Clearwire's control, which could cause actual results to differ materially from such statements. For a more detailed description of the factors that could cause such a difference, please refer to Clearwire's filings with the Securities and Exchange Commission, including the information under the headings "Risk Factors" and elsewhere in each of Clearwire's most recently filed Form 10-Q. Clearwire does not assume any obligation to update or supplement such forward-looking statements.

Certain statements in this press release may contain words such as "could", "expects", "may", "anticipates", "believes", "intends", "estimates", "targets", "envisions", "seeks" and other similar language and are considered forward-looking statements or information under applicable securities legislation. These statements are based on Nortel's current expectations, estimates, forecasts and projections about the operating environment, economies and markets in which Nortel operates. These statements are subject to important assumptions, risks and uncertainties, which are difficult to predict and the actual outcome may be materially different from those contemplated in forward-looking statements. For additional information with respect to certain of these and other factors, see Nortel's Annual Report on Form10-K, Quarterly Reports on Form 10-Q and other securities filings with the SEC. Unless otherwise required by applicable securities laws, Nortel disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

(1)Nortel, the Nortel logo and the Globemark are trademarks of Nortel Networks.

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