MT56DSU-SSyncronous 56K bpsData Service UnitUser Guide

Chapter 2 - Front & BackPanel Descriptions

11Chapter 2 - Front & Back Panel Descriptions2.1 IntroductionThis chapter describes the front panel LEDs and back panel connectors. The front pan

12Chapter 2 - Front & Back Panel Descriptions2.3 Back PanelAll the cable connections, including one power connection and two signal connections,

13Chapter 2 - Front & Back Panel Descriptions2.4 Switch SettingsAn 8-position DIP switch is located on the right side of the MT56DSU-S printed cir

14Chapter 2 - Front & Back Panel Descriptions2.5 ShuntsV.35 signal levels are more reliable for high speed data and/or longer cable distances. For

Chapter 3 - Unpacking & Setup

16Chapter 3 - Unpacking & Setup3.1 IntroductionThis chapter describes the unpacking of the DSU, cable connections depending on whether EIA-232-D o

17Chapter 3 - Unpacking & Setup3.4 SetupPerform the following procedure to connect your cables and, if necessary, change to V.35 signaling on thed

18Chapter 3 - Unpacking & Setup3.5 V.35 ShuntEither EIA-232-D or ITU-T V.35 electrical signal interface can be selected on the Data connector. Un

Chapter 4 - Diagnostics

MT56DSU-S User GuidePN: S000327ACopyright ©2003 by Multi-Tech Systems, Inc.All rights reserved. This publication may not be reproduced, in whole or in

20Chapter 4 - Diagnostics4.1 IntroductionThe DSU is set to a default of Normal (non-diagnostic) mode at the factory. When diagnostics are to be run,ch

21Chapter 4 - Diagnostics4.1.2 Line Loopback TestThis test enables you to test the local DTE, the local DSU, the communications link, and the remote D

22Chapter 4 - Diagnostics4.1.4 DSU Back-to-Back TestThis test lets you connect two DSUs with a back-to-back cable to verify proper DSU operation. Usin

Chapter 5 - Service & Warranty

24Chapter 5 - Service & Warranty5.1 Multi-Tech Systems, Inc. Warranty & Repairs Policies5.1.1 WarrantyMulti-Tech Systems, Inc., (hereafter “MT

25Chapter 5 - Service & Warranty5.1.3 International Customers (outside U.S.A. and Canada)Your original point of purchase reseller may offer the qu

26Chapter 5 - Service & Warranty5.2 Repairs5.2.1 Repair Procedures for U.S. and Canadian CustomersIn the event that service is required, products

27Chapter 5 - Service & WarrantyRepairs for damages caused by lightning storms, water, power surges, incorrect installation, physical abuse,or use

Appendix

29AppendixAppendix A - Application ExamplesIntroductionThis section illustrates several types of applications in which the MT56DSU-S is typically used

ContentsChapter 1 - Introduction... 51.1 Introduction ...

30AppendixDDS Multipoint (Polled) ApplicationSince your Central Office (CO) equipment must include “Multipoint Junction Units” (MJUs) and other specia

31AppendixAppendix B - Interface Signals and Connector PinoutsRJ-48 ConnectorPin 1Pin 8KeyAs viewed from the rearFigure B-1. ConnectorDESCRIPTIONThis

32AppendixDB25S Connector13 12 11 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21

33AppendixDB25S Connector with V.35 Interface13 12 11 10 9 8 7 6 5 4 3 2 1 25 24

34AppendixLoopback Cable (MTS P/N 45640100)18Figure B-5. Loopback Cable ConnectorDESCRIPTIONThis cable lets you test the MT56DSU-S when a second DSU

35AppendixBack-To-Back Cable (MTS P/N 45050000)18Figure B-7. Back-toBack Cable ConnectorDESCRIPTIONThis cable lets you test a suspect DSU by connect

36AppendixAppendix C - Regulatory InformationFCC Regulations for Telephone Line Interconnection1. This equipment complies with Part 68 of the FCC rule

37AppendixCanadian Limitations NoticeNotice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of themaximum

S000327A

Chapter 5 - Service & Warranty... 235.1 Multi-Tech Systems, Inc. Warranty &

Chapter 1 - Introduction

6Chapter 1 - Introduction1.1 IntroductionThe Multi-Tech Systems MultiDSU, model number MT56DSU-S is a synchronous 56 Kbps data service unit(DSU). As

7Chapter 1 - Introduction1.3 DescriptionThe MT56DSU-S is compact, easy to operate and has the features to allow flexibility in meeting yourtransmissio

8Chapter 1 - Introduction1.5 FeaturesThe MT56DSU-S provides many useful features. Standard features include V.35 and EIA-232-D interfaces onthe data p

9Chapter 1 - Introduction1.6 SpecificationsModel Number: MT56DSU-SDevice Operation: combined DSU and CSUData Rates:Synchronous 56 Kbps (Data port and