14-1
Version 1.73 Copyright © 1997 Link Communications Inc. 1/18/97
Chapter 14: Doug Hall RBI-1 and RLC-ICM Routines
What the RBI-1 is:
Doug Hall Electronics' Remote Base Interface (RBI-1) allows the RLC-Club to control the
Kenwood series TM-X21 and TM-X31 mobile radios. The RBI-1 converts the data output by
the RLC-Club into a format that the radios can use. Up to four bands can be supported by one
RBI-1 interface, with one band active at a time. PL (CTCSS) encode and decode is handled by
the radios. The RBI-1 plugs into one of the RLC-Club's radio ports and uses three of the open
collector output lines on the Club Deluxe module. The audio, COR and PTT interface is made
through the RLC-Club's radio port and the signals that control the RBI-1 and ultimately the
radio come from the output lines. More information about the RBI-1, including the address and
phone number for Doug Hall Electronics, is included on the following pages. Link
Communications does not sell the RBI-1 interface.
What the RLC-ICM is:
The RLC-ICM is a remote base interface for IC-900 and IC-901 band modules. The RLC-ICM
uses the same data stream from the repeater controller as the RBI-1, except for the special setup
codes sent with command 139. Up to four bands can be supported by one RLC-ICM interface.
Unlike the RBI-1, more than one band can be active at the same time; up to all four bands can
transmit or receive at the same time. The RLC-ICM also supports a Communications
Specialists' TS-64 PL board for each band module. Each band that has a TS-64 can encode and
decode PL. Different bands can use different PL frequencies. The RLC-ICM plugs into one of
the RLC-Club's radio ports and uses two of the open collector output lines on the Club Deluxe
module. The audio, COR and PTT interface is made through the RLC-Club's radio port and the
signals that control the RBI-1 and ultimately the radio come from the output lines. The RLC-
ICM is available from Link Communications.
Interfacing and Setup:
It is very easy to interface the RBI-1or RLC-ICM to the RLC-Club. Directions for building the
needed cable is provided on one of the following pages. You can build it yourself or order one
from Link Communications, Inc.. The RBI-1 is connected to the radio's microphone connectors
with cables supplied with the RBI-1. The RLC-ICM includes cables and small interface boards
to connect to the IC-900/901 band modules. The only other connections are power, ground and
antenna to the radios. The RBI-1 gets its power from the radio; the RLC-ICM has its own
power plug.
If you are using the RLC-ICM, you will need to set it up with command 139. After that, all of
the commands to set frequency, bands, etc should work.
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