ATIS T1.418-2002 (R2006)

This standard presents the electrical characteristics of the High bit rate Digital Subscriber Line – Second Generation (HDSL2) signals appearing at the network and remote ends of the twisted-wire pair line. The transport medium for the signals is, a single twisted-wire pair or two twisted-wire pairs (HDSL4) that supports full-duplex transmission with a payload of 1.544 Mbps. This interface standard provides the minimal set of requirements for satisfactory transmission between the network and the remote installation. Equipment may be implemented with additional functions and procedures.