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DSU/CSU (Data Service Unit/Channel Service Unit)
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
A DSU (data service unit) is a communication device that connects a company's telephone premises equipment to digital communication lines, such as a T1. A CSU (channel service unit) provides line termination and signal regeneration. The DSU and the CSU are often combined in one device and connected to a channel bank, which provides analog-to-digital conversion and multiplexing of voice transmissions. See "CSU/DSU (Channel Service Unit/Data Service Unit)."
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.