data service unit


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data service unit

(communications)
(DSU or "data service unit") A device used in digital transmission for connecting a CSU (Channel Service Unit) to Data Terminal Equipment (a terminal or computer), in the same way that a modem is used for connection to an analogue medium.

A DSU provides a standard interface to a user's terminal which is compatible with modems and handles such functions as signal translation, regeneration, reformatting, and timing. The transmitting portion of the DSU processeses the customers' signal into bipolar pulses suitable for transmission over the digital facility. The receiving portion of the DSU is used both to extract timing information and to regenerate mark and space information from the received bipolar signal.
References in periodicals archive ?
Traditionally, a number of different devices are used at the LAN-WAN interface including data service units (DSU) for basic connectivity, WAN probes, routers to direct data traffic and other solutions for monitoring functions (particularly for Service Level Agreements).
Deutsche Telekom immediately set about defining and locating the the PCSI multiplexer and ADC Kentrox data service unit needed in order to be technologically compatible with its network in Germany.
In addition, it introduced a series of diagnostic Data Service Units.
From October 1981 through December 1982, the customer could choose between a telco-provided 500B-type data service unit or purchase his or her own DSU to interface with the telco's CSU.
shdsl data service unit designed for small offices and branch offices to provide cost-effective access to high-speed G.
Lab equipment and lab facilities (routers, Channel Service Unit/ Data Service Units, Asynchronous Transfer Mode switches, Private Branch Exchange, and communications security equipment) were provided by the BCBL (G) and through a contract with the General Dynamics Corporation.
The Access Bank II includes two T1 network interfaces with fully integrated CSU and Data Service Units (DSU), offering up to 3 Mbps of total throughput.