channel service unit


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channel service unit

(communications)
(CSU) A type of interface used to connect a terminal or computer to a digital medium in the same way that a modem is used for connection to an analogue medium.

A CSU is provided by the communication carrier to customers who wish to use their own equipment to retime and regenerate the incoming signals. The customer must supply all of the transmit logic, receive logic and timing recovery in order to use the CSU, whereas a digital service unit DSU performs these functions.
References in periodicals archive ?
Options include built-in subrate data multiplexer cards and T1 ESF Channel Service Units.
Yipes' fully managed service required no expensive routers or channel service units, only a free port on Refco's LAN switch.
With its all inclusive design, Soloist eliminates the need for separate access routers, channel service units (CSUs), data service units (DSUs), VPN managers or policy managers, providing a significant cost advantage while reducing resources needed for installation and maintenance.
CPE includes, among other items, ISDN telephone sets, PBXs, multiplexers, channel service units, routers, bridges, modems and associated software and firmware.
BROADway is a flexible, modular system that can integrate some or all of the following functionality in a single chassis--SONET/SDH Add-Drop Multiplexer (ADM), multiple high-speed IP edge routers, Digital Crossconnect System (DCS), 1/3 Multiplexer (M13), Integrated Access Device (IAD), DSL Access Multiplexer (DSLAM), Digital Loop Carrier (DLC), and high-density Channel Service Units (CSU).