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"As the competition heats up to capture more subscribers and keep pace with new technologies, our cable customers like Adelphia continue to look at voice over IP technologies to give subscribers the best of the Internet with the best of today's telephone network," said Dan Mondor, general manager, Global Cable Solutions, Nortel. "Nortel has the experience and expertise to give Adelphia the carrier grade reliability expected, plus Global Services to help maximize network investment."

Under an agreement announced today, Adelphia is deploying Nortel Communication Server (CS) 2000-Compact, a superclass softswitch that allows cable operators and service providers to deliver a full suite of traditional services to residential and business markets for strategic VoIP applications. Nortel's PacketCable-qualified softswitch is interoperable with a variety of industry-leading cable products and services and gives cable operators the opportunity to offer a wide range of services more efficiently and cost-effectively over the cable broadband network.

CS 2000-Compact uses Session Initiation Protocol (SIP) to provide direct packet connectivity to other softswitches. SIP is an industry standard signaling protocol designed to manage voice and video sessions across a packet network. Using the SIP capabilities on the CS 2000-Compact will allow Adelphia to cost effectively connect to the Public Switched Telephone Network (PSTN).

As part of this agreement, Adelphia is also using Nortel Global Services to plan, build, operate and maintain its VoIP network. Nortel is acting as the network integrator to bring together solutions from multiple vendors that will be critical to launching Adelphia's cable VoIP network, including the Cable Modem Termination System (CMTS), Multimedia Terminal Adaptor (MTA), flow through provisioning and interconnect components. Nortel will also operate and monitor the Adelphia VoIP network with on-site resources and act as the single point of contact for trouble resolution.

Nortel continues to gain momentum in the cable telephony market with solutions designed to help cable operators drive new revenue opportunities and reduce operating costs. These comprehensive, integrated cable solutions span video and video on-demand transport, voice and multimedia communications, high-speed data services, managed network services for business customers, and next generation access.