Multi-Tech Systems MT56DSU-S manual Diagnostics

Page 19

Chapter 4 - Diagnostics

Image 19

Contents User Guide MT56DSU-S Syncronous 56K bps Data Service UnitRevision Date Description Contents Service & Warranty Introduction About This Manual IntroductionCSU Functions DescriptionCSU/DSU Basics DSU FunctionsFeatures Specifications Front & Back Panel Descriptions Front Panel Front PanelBack Panel Power Connector2 RS232 Connector Line ConnectorSwitch 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 Warranty Multi-Tech Systems, Inc. Warranty & Repairs Policies2 U.S. and Canadian Customers International Distributors International Customers outside U.S.A. and CanadaRepair Procedures for International Customers Repair Procedures for U.S. and Canadian CustomersRepairs Internet Site Technical SupportAppendix DDS Point-To-Point Application Appendix a Application ExamplesIntroduction Local Area Data Set 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