DATA SERVICE UNIT (DSU)

1. A device used for interfacing data terminal equipment ( DTE ) to the public telephone network . ( 188 ) 2. A type of short-haul, synchronous -data line driver , usually installed at a user location, that connects user synchronous equipment over a 4-wire circuit at a preset transmission rate to a servicing central-office. Note: This service can be for a point-to-point or multipoint operation in a digital data network.