Shunts | Multi-Tech Systems MT56DSU-S guide

Chapter 2 - Front & Back Panel Descriptions

2.5Shunts

V.35 signal levels are more reliable for high speed data and/or longer cable distances. For higher speeds and/or longer distances, V.35 is preferred. EIA-232-D signal levels are intended for data rates of 19.2 Kbps or less and cable lengths of 50 feet or less.

There are two shunt positions in the middle left side of the printed circuit board that configure the data port for either RS232 or V.35 operation. The shunt positions are shown in Figure 2-3.

V.35 Shunt Position							RS232 Shunt Position

Figure 2-3. Shunts

The shunt position closest to the DIP switches is for RS232 data interface and the other one is for V.35 data interface. The shunt is shown in the RS232 (default) position in Figure 2-3. To change the position of a shunt, refer to the V.35 Shunt in Chapter 3.

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Multi-Tech Systems MT56DSU-S manual Shunts

Contents

MT56DSU-S Syncronous 56K bps Data Service Unit User Guide Revision Date Description Contents Service & Warranty Introduction Introduction About This Manual DSU Functions DescriptionCSU/DSU Basics CSU Functions Features Specifications Front & Back Panel Descriptions Front Panel Front Panel Line Connector Power Connector2 RS232 Connector Back Panel Switch Settings Switch Settings Mode Position Description Shunts Shunts Unpacking & Setup Telecom Safety Warnings Unpacking Setup Back Panel Connections V.35 Shunt Diagnostics Loopback Test Diagram Loopback Test Line Loopback Test DSU Loopback Test DSU Back-to-Back Test Diagram DSU Back-to-Back Test Service & Warranty 2 U.S. and Canadian Customers Multi-Tech Systems, Inc. Warranty & Repairs PoliciesWarranty International Customers outside U.S.A. and Canada International Distributors Repairs Repair Procedures for U.S. and Canadian CustomersRepair Procedures for International Customers Technical Support Internet Site Appendix Local Area Data Set Application Appendix a Application ExamplesIntroduction DDS Point-To-Point Application DDS Multipoint Polled Application Figure A-3. DDS Multipoint Polled Application Appendix B Interface Signals and Connector Pinouts RJ-48 Connector DB25S Connector Pin Description Signal DB25S Connector with V.35 Interface Pin Description Loopback Cable MTS P/N Build Instructions Figure B-7. Back-toBack Cable Connector Back-To-Back Cable MTS P/N Appendix C Regulatory Information FCC Regulations for Telephone Line Interconnection Canadian Limitations Notice S000327A