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

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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