Multi-Tech Systems MT56DSU-S DB25S Connector

Appendix

DB25S Connector

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

25 24 23 22 21 20 19 18 17 16 15 14

Figure B-2. Connector

DESCRIPTION

This connector ties the MT56DSU-S to the DTE. The DB25S connector has the following pinout

configuration.

PIN IDENTIFICATION

Pin Description Signal

1 Chassis Ground

2 Transmit Data SD

3 Received Data RD

4 Request To Send RTS

5 Clear To Send CTS

6 Data Set Ready DSR

7 Signal Ground SG

8 Carrier Detect CD

15 Transmit Clock TC

17 Receive Clock RC

20 Data Terminal Ready DTR

Contents

Main Revision Date Description Contents Page Page 1.1 Introduction 1.2 About This Manual 1.3 Description 1.4 CSU/DSU Basics 1.4.1 DSU Functions 1.4.2 CSU Functions 1.5 Features 1.6 Specifications Page 2.1 Introduction 2.2 Front Panel 2.3 Back Panel 2.3.1 POWER Connector 2.3.2 RS232 Connector 2.3.3 LINE Connector 2.4 Switch Settings 2.5 Shunts Page 3.1 Introduction 3.2 Unpacking 3.3 Telecom Safety Warnings 3.4 Setup 3.5 V.35 Shunt Page 4.1 Introduction 4.1.1 Loopback Test 4.1.2 Line Loopback Test 4.1.3 DSU Loopback Test 4.1.4 DSU Back-to-Back Test Page 5.1 Multi-Tech Systems, Inc. Warranty & Repairs Policies 5.1.1 Warranty 5.1.2 U.S. and Canadian Customers 5.1.3 International Customers (outside U.S.A. and Canada) 5.1.4 International Distributors 5.2 Repairs 5.2.1 Repair Procedures for U.S. and Canadian Customers 5.2.2 Repair Procedures for International Customers 5.2.3 Repair Procedures for International Distributors 5.2.4 Replacement Parts 5.3 Technical Support 5.4 Internet Site Page Appendix A - Application Examples Introduction Local Area Data Set Application DDS Point-To-Point Application DDS Multipoint (Polled) Application Appendix B - Interface Signals and Connector Pinouts RJ-48 Connector DB25S Connector DB25S Connector with V.35 Interface Loopback Cable (MTS P/N 45640100) Back-To-Back Cable (MTS P/N 45050000) Appendix C - Regulatory Information FCC Regulations for Telephone Line Interconnection Canadian Limitations Notice