The T7630 Dual T1/E1 Terminator consists of two independent, highly integrated, software-configurable, full-featured short-haul transceiver/framers. The T7630 provides glueless interconnection from a T1/E1 line to a digital PCM system. Minimal external clocks are needed. Only a system clock/frame sync and a phase-locked line rate clock are required. System diagnostic and performance monitoring capability with integrated programmable test pattern generator/detector and loopback modes is provided.