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March 13, 2008 06:00 ET

Comcast to Conduct First Live 100G Network Trial with Nortel Optical Solution

Comcast Hosts IETF Meeting Where 100G Test to be Conducted

PHILADELPHIA, PENNSYLVANIA--(Marketwire - March 13, 2008) - Comcast Corporation (NASDAQ:CMCSK)(NASDAQ:CMCSA), the nation's leading provider of entertainment, information and communications, is testing a 100 Gigabit/sec optical solution from Nortel(1) (TSX:NT)(NYSE:NT). Comcast(2) is conducting this test at the 71st meeting of the Internet Engineering Task Force (IETF) conference which it is hosting in Philadelphia.

Comcast's network trial will be first time real traffic is run over a 100G wavelength on its existing network that is also carrying live 10G and 40G links. The trial will run in parallel over the same optical infrastructure that supports a combination of high definition or HD video, Internet and voice traffic on Comcast's 40G national backbone network. Nortel's 100G solution, based on the Nortel 100G Adaptive Optical Engine, is designed to operate with comparable performance to today's networks, enabling operators to dramatically increase capacity.

"Testing an interoperable multi-vendor 100G solution will help provide us with important information about how new solutions will support a next generation of high-bandwidth services for the digital generation of consumers," said John Schanz, EVP National Engineering and Technical Operations for Comcast. "As we continue to expand our cross-platform video, voice and data services, we need these types of innovative technologies from vendors like Nortel to support the rapid growth of new applications and services that run over our network."

"Comcast is testing the very future of networking with this 100G network trial. We can only imagine what new innovations may be sparked by the capabilities made possible with this technology," said Philippe Morin, president, Metro Ethernet Networks, Nortel. "Nortel has developed the most cost-effective 40G solution and is at the vanguard of delivering tomorrow's 100G networks. This test by Comcast is a first step in the broader adoption of 100G. Built on Nortel's 40G/100G Adaptive Optical Engine, the 100G solution requires no expensive network reengineering as it can use existing network elements, including in-ground fiber. More importantly, it sets the stage for the coming era of hyperconnectivity, where every device that should connect to the network will connect to the network."

The 100G trial will run for the week of March 9th spanning the Comcast infrastructure from Philadelphia, PA to McLean, VA traversing Comcast's metro and long-haul fibers. More than 1,200 of the world's top Internet engineers are expected to attend this IETF meeting and make use of this high-speed network to access the Internet.

The 100G solution runs over Comcast's existing fiber network. The network is comprised of Comcast's existing Common Photonic Layer DWDM solution with 50GHz enhanced Reconfigurable Optical Add/Drop Multiplexer (eROADM) and photonic components, augmented with prototype 100G interfaces installed in Nortel's Optical Multiservice Edge 6500. The 100G cards utilize Nortel's 40G/100G Adaptive Optical Engine, with integrated dispersion compensation and dual-polarization Quadrature Phase Shift Keying (QPSK) modulation, the same technology used in Nortel's present 40G solution.

About Comcast Corporation

Comcast Corporation (NASDAQ:CMCSK)(NASDAQ:CMCSA) (http://www.comcast.com(2)) is the nation's leading provider of entertainment, information and communications products and services. With 24.1 million cable customers, 13.2 million high-speed Internet customers, and 4.6 million voice customers, Comcast is principally involved in the development, management and operation of broadband cable systems and in the delivery of programming content.

Comcast's content networks and investments include E! Entertainment Television, Style Network, The Golf Channel, VERSUS, G4, PBS KIDS Sprout, TV One, ten regional Comcast SportsNets and Comcast Interactive Media, which develops and operates Comcast's Internet business. Comcast also has a majority ownership in Comcast-Spectacor, whose major holdings include the Philadelphia Flyers NHL hockey team, the Philadelphia 76ers NBA basketball team and two large multipurpose arenas in Philadelphia.

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.

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.

(2) This is a 3rd party link as described in our Web linking practices.

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