Clearwire to Deliver Advanced IP Voice with Nortel Carrier VoIP Technology

TORONTO, ONTARIO, Jan 22 (MARKET WIRE) --
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 www.nortel.com.
For the latest Nortel news, visit www.nortel.com/news.

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
www.clearwire.com.

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.

Contacts:
Nortel
Miranda MacDonald
(905) 863-1098
Email: mirandam@nortel.com
Website: www.nortel.com

Clearwire
Helen Chung
(425) 216-4551
Email: helen.chung@clearwire.com
Website: www.clearwire.com

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