Multi-Tech Systems FR111 - Manual (Page 34)

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3.5 V.35 Shunt
Either EIA-232D or ITU-T V.35 electrical signal interface can be selected
on the data port. Units are shipped with EIA-232D signal levels se-
lected. 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. Please
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. Pry the data port shunt out of its RS232 socket and insert it into the
V.35 socket.
V.35 Shunt Position
RS232 Shunt Position
Figure 3-5. Shunts
4. Carefully reassemble the unit, making sure that no foreign objects
are accidentally left inside.
6. The data port is now configured with V.35 signal levels. The cable
pin designations are shown in Appendix A. To connect to a device
equipped with a V.35 34-pin connector, you must obtain an
adapter cable. Using the signal pin designations in Appendix A,
you may make or order a cable from most any cable vendor.