Standard for a serial interface used to connect to T3 lines (see T3). HSSI operates over a shielded cable at speeds of up to 52 megabits per second (Mbps) and distances of up to 50 feet. Functionally, it serves the same purpose as lower-speed serial interfaces such as V.35 and RS-232, in that it provides the interface for wide-area-network communications (see V.35 and RS-232).

A serial interface that operates at speeds up to 52 Mbps at distances up to 50 feet. It is similar to, but faster than, RS-232 and V.35 serial interfaces.

High Speed Serial Interface

A physical-layer interface between a DTE, such as a high-speed router or similar device, and a DCE, such as a DS-3 (45Mbps) or SDH/SONET OC-1 DSU.