Multi-Tech Systems MT56DSU-S manual V.35 Shunt, Shunts

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Chapter 3 - Unpacking & Setup

3.5V.35 Shunt

Either EIA-232-D or ITU-T V.35 electrical signal interface can be selected on the Data connector. Units are shipped with EIA-232-D signal levels selected. Use the following procedure to select V.35.

CAUTION : This procedure requires opening the unit. Like most products of this type, this product contains components that are sensitive to static and static discharge. Use your best efforts to avoid static discharge when contacting the components inside this unit.

WARNING: Always disconnect the power cord before opening the enclosure to avoid any chance of electric shock.

1.Unplug the power cord.

2.The enclosure consists of two halves. Using a Phillips screwdriver, remove the two screws from the bottom of the unit. Remove the top half.

3.Carefully pry the shunt out of its RS232 socket and insert it into the V.35 socket.

V.35 Shunt Position

RS232 Shunt Position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 3-2. Shunts

4.Carefully reassemble the unit, making sure no foreign objects are accidentally left inside.

5.The DSU is now configured for V.35 signal levels. To connect to a device with a 34-pin Winchester female V.35 connector, use an adapter cable with a 25-pin female connector at one end and a 34-pin Winchester male connector at the other end. Using the signal pin designations in Appendix A, you can make or order a cable from most any cable vendor.

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Contents MT56DSU-S Syncronous 56K bps Data Service Unit User GuideRevision Date Description Contents Service & Warranty Introduction Introduction About This ManualDSU Functions DescriptionCSU/DSU Basics CSU FunctionsFeatures Specifications Front & Back Panel Descriptions Front Panel Front PanelLine Connector Power Connector2 RS232 Connector Back PanelSwitch Settings Switch Settings Mode Position DescriptionShunts ShuntsUnpacking & Setup Telecom Safety Warnings UnpackingSetup Back Panel ConnectionsV.35 Shunt Diagnostics Loopback Test Diagram Loopback TestLine Loopback Test DSU Loopback TestDSU Back-to-Back Test Diagram DSU Back-to-Back TestService & Warranty Multi-Tech Systems, Inc. Warranty & Repairs Policies Warranty2 U.S. and Canadian Customers International Customers outside U.S.A. and Canada International DistributorsRepair Procedures for U.S. and Canadian Customers Repair Procedures for International CustomersRepairs Technical Support Internet SiteAppendix Local Area Data Set Application Appendix a Application ExamplesIntroduction DDS Point-To-Point ApplicationDDS Multipoint Polled Application Figure A-3. DDS Multipoint Polled ApplicationAppendix B Interface Signals and Connector Pinouts RJ-48 ConnectorDB25S Connector Pin Description SignalDB25S Connector with V.35 Interface Pin DescriptionLoopback Cable MTS P/N Build InstructionsFigure B-7. Back-toBack Cable Connector Back-To-Back Cable MTS P/NAppendix C Regulatory Information FCC Regulations for Telephone Line InterconnectionCanadian Limitations Notice S000327A
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