Chapter 1 - Introduction

1.1Introduction

The Multi-Tech Systems MultiDSU, model number MT56DSU-S is a synchronous 56 Kbps data service unit (DSU). As a combined DSU and Channel Service Unit (CSU), it provides a direct connection to the DATAPHONE® Digital Service (DDS) network. The MT56DSU-S connects a synchronous Data Terminal Equipment (DTE) device to remote equipment using DDS network lines at 56 Kbps speeds for point-to-point and multi-point service.

Figure 1-1. MultiDSU Modem

1.2About This Manual

Chapter 1 - Introduction contains an introduction to the MT56DSU-S product and its features and functions.

Chapter 2 - Front and Rear Panel Descriptions provides front panel LED descriptions and rear panel connector descriptions, DIP-switch settings, and an RS232/V.35 shunt description.

Chapter 3 - Unpacking and Setup provides unpacking, safety warnings, setup procedures, and how to change the shunt from the default RS232 position to the V.35 position.

Chapter 4 - Diagnostic Testing explains how to set up and run a diagnostic test.

Chapter 5 - Service and Warranty provides instructions on getting service for your MultiDSU at the factory, a statement of the limited warranty, information about our user bulletin board service, and space for recording information about your MultiDSU prior to calling Multi-Tech's Technical Support. The final three sections explain how to use our bulletin board service (BBS), and get support through CompuServe and the Internet.

Appendix A - Application Examples illustrates several DSU/CSU uses that may help in understanding your particular installation site.

Appendix B - Interface Signal and Connector Pinouts lists the various electronic signals and connector pinouts related to the MT56DSU-S.

Appendix C - Regulatory Information

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Multi-Tech Systems MT56DSU-S manual Introduction, About This Manual