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Chapter 11: Peripheral device cabling interface
Gandalf LDS 120E limited-distance modem
553-3202-210 Standard October 1998
The Gandalf LDS 120E limited-distance modem allows you to extend the
distance between the IPE Module or the Application Module and any
connected peripheral up to a nominal distance of 8 km (5 miles). Figure 81
illustrates the hardware configuration required to use the Gandalf LDS 120E
modem.
Ensure that the jumper options match the settings shown in Figure 82. The
switch on the back of the modem should be set to the ÒnormalÓ position.
Connecting the Gandalf LDS 120E modem to the IPE Module or
the Application Module
1
Connect the DB25 connector from the IPE Module or the Application
Module port to a null-modem adapter.
2
Connect the null-modem adapter to the female DB25 socket on the
first Gandalf LDS 120E modem.
3
Connect the first Gandalf LDS 120E modem to the second modem
with 2-pair twisted cable (24 AWG). This cable cannot exceed 8 km
(5 miles).
4
Connect the second Gandalf LDS 120E modem to the peripheral
device using a straight DB25 cable.
5
Once the modems are connected, turn on the power and ensure that
the DCD lamp on each modem comes on.
This lamp indicates that each Gandalf LDS 120E modem is active.
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