channel service unit/data service unit


Also found in: Acronyms.

channel service unit/data service unit

(communications, hardware)
(CSU/DSU, or "..digital..") A device that performs both the channel service unit (CSU) and data service unit (DSU) functions. The Channel Service Unit (CSU) is used to terminate a DS1 or DS0 (56/64 kb/s) digital circuit. It peforms line conditioning, protection, loop-back and timing functions. The Data Service Unit (DSU) terminates the data circuit to the Data Terminal Equipment (DTE) and converts the customer's data stream into a bi-polar format for transmission.
References in periodicals archive ?
AT&T's Frame Relay Plus Service provides installation and maintenance of Visual Networks(R)' ASE Channel Service Unit/Data Service Unit (CSU/DSUs) on customers' premises, end-to-end monitoring extended to the CSU/DSU interface and three levels of service businesses select depending on their needs.
The flexible interface supports multiple environments such as DS-3/E3, synchronous optical network (SONET) and synchronous transport signal level one (STS-1) rates (including SMDS and Frame Relay) using an external channel service unit/data service unit (CSU/DSU).
The BANC 1011 is a router with integrated RADSL CAP-based remote modem, while the BANC 1021 is a T1/FT1 router with an integrated channel service unit/data service unit (CSU/DSU).
The Cisco 1601 includes a built-in serial WAN port; the Cisco 1602 has an onboard Channel Service Unit/Data Service Unit (CSU/DSU); the 1603 has an ISDN Basic Rate Interface (BRI) port; and the Cisco 1604 includes an ISDN BRI interface and a built-in Network Termination (NT-1) device.
Compatible Systems Corporation today announced that it has introduced a 56 Kbps Channel Service Unit/Data Service Unit (CSU/DSU) for use with its MicroRouter 900i and 1000R wide area routers.