2-1
RLC-4 V1.79 Copyright © 1998 Link Communications Inc. 9/18/98
Chapter 2: Port Connection Commands
This chapter deals with the commands used in connection and control of the radio ports. The three
areas dealt with in this chapter are:
Radio port connections
Receiver access control
Transmitter PTT control
"Connected Ports"
In this chapter you will often see references to ports being "connected". When two ports are
connected, they hear each other (the COR from each port will activate the PTT on the other, and
the audio from each will be transmitted out the other). All of the radio ports on the controller can
work independently, or they can be connected together in any combination. If all of the ports are
connected to each other, the whole controller works as one unit, with audio received on any of the
receivers going out all of the transmitters.
You can make a port a repeater by connecting it to itself, so it hears (repeats) its own audio. When
using a port for a link or remote base, it should not be connected to itself; when audio is received
on a remote it should not be transmitted back out the remote. Instead, the audio from the remote
should be transmitted out of a repeater, and the audio from the repeater should go out the remote.
So the repeater port should be connected to itself (to make it a repeater) and the repeater port
should be connected to the remote base port (so they can hear each other). The remote base port
should not be connected to itself. To turn the remote off, you can disconnect it from the repeater
port and they will no longer hear each other.
It is also possible to make a one-way connection, that is to have one port monitor another. If you
make the repeater port monitor the remote base port, the people listening to the repeater would be
able to hear the remote base, but the remote base would not transmit the audio received on the
repeater. In this case we could say that the remote receiver is connected to the repeater
transmitter, but that the repeater receiver is not connected to the remote transmitter.
When you make an autopatch call, the controller automatically connects the radio port that made
the call to the autopatch port. It also may connect to the patch any ports that were connected to
(or monitoring) the port that made the call, to avoid one-way conversations. It also connects the
autopatch to itself (to keep it off hook when you unkey) even though it doesn't get it's own audio
looped back (there is a special case in the code to break that audio connection).
Turning a Repeater Off
There is more than one way to turn a repeater off, each of which has advantages and disadvantages.
For this example, we will assume that you have a repeater connected to port 1.