Application of high bit-rate digital subscriber line (HDSL) technology

High bit-rate Digital Subscriber Line (HDSL) technology permits two-way 1.544 or 2.048 Mb/s transport over most existing copper telephone cables without repeaters, cable conditioning, or binder group segregation. Approximately 1000 HDSLs are now in service, and the rate of deployment is accelerating. Compared with traditional high speed copper transport systems, HDSL engineering, installation, and maintenance are simpler. Non-intrusive measurement of Signal-to-Noise Ratio (SNR) and digital performance greatly improves the HDSL's utility. HDSL permits rapid and low-cost service turn-up for private line DS1, fractional DSI rate, switched services, and access to PCS base stations. A strong synergy exists between HDSL and the fiber deployments planned for the next several years.