Multitech MT56DSU-R Owner's Manual download pdf (Page 8)

MT56DSU-R Owner's Manual

1.4 CSU/DSU Basics

A DSU (Data Service Unit) and a CSU (Channel Service Unit) are

typically connected to provide the interface between a DTE (data

terminal equipment) and the DDS (Digital Data Service) or other

four-wire network.

The DSU is used to process serial synchronous or asynchronous

digital data over the DDS network or other four-wire unloaded

twisted-pair wiring network.

The MT56DSU-R can transmit data at 56000, 19200, 9600, 4800

and 2400 bps in multi-point and point-to-point applications.

The MT56DSU-R contains the functions of a Data Service Unit

(DSU) and a Channel Service Unit (CSU) in a single package.

1.4.1 DSU Functions

The DSU encodes data as pulses on the communications line by

converting the customer data stream to bipolar format for

transmission over the digital network.

1.4.2 CSU Functions

The CSU is used to terminate the digital circuit at the customer site.

It performs line conditioning functions, ensures network compliance

with FCC rules, and responds to test commands (either from the

telco central office (CO) or from the CSU).

The figure below shows the MT56DSU-R in a basic DDS network

installation.

Figure 1-1.

Basic DSU/CSU Configuration

82023101.p65 2/12/01, 2:52 PM8

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 63 64

No comments

Multitech MT56DSU-R Owner's Manual Page 8