Asymmetrical digital subscriber lines (ADSL) technology for local access evolution

The current status of research and development efforts on asymmetrical digital subscriber lines (ADSL) technology is reviewed. The performance and design tradeoff is described. These bit rates will potentially allow the LEC's to use the existing embedded copper loop plant to begin offering of a video dial tone service using highly compressed digital video. 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-loop (FITL).