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The TDM-to-packet network transformation has been underway in transport/telecommunications networks for some years now, fueled primarily by two trends: the advent of triple-play (voice, video, data) for enterprise and residential customers, and, lately, the explosion in video and mobile data services, and the evolution in both packet- and transport-network equipment. The goal of the carrier, of course, is to offer manageable end-user data services with a measurable QoS (Quality-of-Service) at the minimum cost per bit, using the smallest footprint systems, with the simplest implementation that allows for service-level agreements, operational efficiency, and traffic scalability.
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