Colubris, Nortel Unwire Trinity

DALLAS -- 4G Metro, the wirelessnetwork operator for Trinity Railway Express (TRE), has selected Nortel*(NYSE: NT) (TSX: NT) and Colubris Networks to provide equipment for what isexpected to be the first end-to-end broadband wireless service offered by amajor U.S. public railway.

The TRE network deployment is scheduled to be the first under a newjoint marketing and sales agreement between Nortel and Colubris Networks.The two companies have also made a mutual commitment to productinteroperability testing.

TRE is a cooperative public railway linking Fort Worth, Dallas and DFWInternational Airport. Beginning in early summer 2007, TRE plans to provideapproximately 5,000 daily passengers with high-speed wireless Internetaccess and a range of information and entertainment services. This willinclude breaking news and sports, local advertising and other video contentpresented on 27-inch LCD screens.

"We expect TRE to set a critical technology bar for other providersacross the country," said Don Lanham, chief marketing officer of 4G Metro,a privately owned wireless services company that will own and operate thenetwork under a public/private partnership agreement with TRE.

"Our decision to select Nortel and Colubris was simple," Lanham said."Both have superior wireless broadband solutions proven in large-scaledeployments. This is crucial to providing leading-edge wireless servicesfor TRE passengers with optimal performance, reliability and security."

4G Metro intends to use Nortel's Municipal Wireless Solution -including wireless mesh, WiMAX and optical technologies - to deliverintegrated voice, data and multimedia along the entire 36-mile TRE route.They will deploy Colubris Networks' Intelligent WLAN Mobility System forpassenger access to the Internet and other services on the train and in thestations. Colubris Wireless Client Bridges will provide seamlessconnectivity to Nortel Wireless Access Points at speeds up to 63miles-per-hour. Colubris MultiService Access Points and MultiServiceControllers will support Internet 'hotspot' service for passengers withscalable user access control and QoS services.

"TRE's service will be a major step in the growth of broadband wirelessin non-traditional venues," said Angela Singhal, director, MunicipalWireless Solutions, Nortel. "We expect the flexibility and security ofColubris' intelligent wireless LAN solution, combined with Nortel'stechnology and global experience in designing, installing and launchinghundreds of public and private wireless networks, to help TRE makeaffordable broadband wireless services available to its passengers."

"With Nortel, we are offering transportation and other serviceproviders an industry-leading municipal wireless broadband solution," saidRoger Sands, co-president and vice president, engineering, ColubrisNetworks. "We look forward to working together to provide cutting-edgecompanies like TRE with comprehensive wireless solutions that combineColubris' highly reliable and secure Wi-Fi solutions with the marketbreadth of Nortel's Municipal Wireless Solution."

Colubris Networks Inc.

Nortel Networks Ltd.