Abstract
Continuing advances in digital subscriber line technology are making it possible to transport 1.5 Mb/s over the nonloaded copper loop plant, 3 to 4 Mb/ s over carrier serving area loops, and above 10 Mb/s over drop wiring from fiber-to-the-curb (FTTC) systems. These bit rates allow the local exchange carriers to enter the video dial tone market using highly compressed digital video. Initially, all copper access techniques can be used. One channel of VCR quality video can be provided over the nonleaded loop plant, to about 75% of homes. NTSC quality video or two channels of VCR quality video can be delivered over carrier-serving areas to about 55% of homes. With time, the penetration of fiber into the feeder network will increase the number of customers who can receive the latter service. The establishment of a successful video dial tone offering using copper technologies should fuel demand for enhanced quality and additional channels, further accelerating deployment of fiber in the feeder and distribution networks. >
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