Multi-Tech Systems MT56DSU-S manual DB25S Connector with V.35 Interface, Pin Description

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Appendix

DB25S Connector with V.35 Interface

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Figure B-3. Connector

DESCRIPTION

The DB25 connector also ties the MT56DSU-S to a DTE with a V.35 interface. When a V.35 interface device is connected to a MT56DSU-S, the internal shunt has to be moved to the V.35 position. The V.35 interface for the DB25 connector has the following pinout configuration.

PIN IDENTIFICATION

Pin Description

1Chassis Ground

7Signal Ground

4Request To Send

5Clear To Send

6Data Set Ready

8Carrier Detect

20Data Terminal Ready

2Transmit Data (A)

12Transmit Data (B)

3Receive Data (A)

22Receive Data (B)

15Transmit Clock (A)

21Transmit Clock (B)

17Receive Clock (A)

18Receive Clock (B)

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Contents User Guide MT56DSU-S Syncronous 56K bps Data Service UnitRevision Date Description Contents Service & Warranty Introduction About This Manual IntroductionCSU/DSU Basics DescriptionDSU Functions CSU FunctionsFeatures Specifications Front & Back Panel Descriptions Front Panel Front Panel2 RS232 Connector Power ConnectorLine Connector Back PanelSwitch Settings Mode Position Description Switch SettingsShunts ShuntsUnpacking & Setup Unpacking Telecom Safety WarningsBack Panel Connections SetupV.35 Shunt Diagnostics Loopback Test Loopback Test DiagramDSU Loopback Test Line Loopback TestDSU Back-to-Back Test DSU Back-to-Back Test DiagramService & Warranty Multi-Tech Systems, Inc. Warranty & Repairs Policies Warranty2 U.S. and Canadian Customers International Distributors International Customers outside U.S.A. and CanadaRepair Procedures for U.S. and Canadian Customers Repair Procedures for International CustomersRepairs Internet Site Technical SupportAppendix Introduction Appendix a Application ExamplesLocal Area Data Set Application DDS Point-To-Point ApplicationFigure A-3. DDS Multipoint Polled Application DDS Multipoint Polled ApplicationRJ-48 Connector Appendix B Interface Signals and Connector PinoutsPin Description Signal DB25S ConnectorPin Description DB25S Connector with V.35 InterfaceBuild Instructions Loopback Cable MTS P/NBack-To-Back Cable MTS P/N Figure B-7. Back-toBack Cable ConnectorFCC Regulations for Telephone Line Interconnection Appendix C Regulatory InformationCanadian Limitations Notice S000327A