Unit installation

13-18
RLC-3 V1.80 Copyright © 1998 Link Communications Inc. 9/17/98
128: Set/Recall Patch Audio Options for a TX
Talking to someone using the autopatch is different in several ways from talking to someone on a
repeater. One difference is that when you are talking on a repeater, everyone has to wait until you
unkey before they can talk (unless they have a stronger signal than you do and can capture the
repeater receiver); a person talking on a phone during an autopatch call can talk at the same time
that you are talking on the radio. If you are using a typical transceiver (HT or mobile) that is half-
duplex (cannot transmit and receive at the same time), you can’t talk and listen at the same time. If
the autopatch is set up to work full-duplex and the person on the phone talks at the same time you
do, you will not be able to hear what they are saying, but anyone else listening to the repeater will
be able to hear both you and them. To avoid this problem, the autopatch can be set to work in half-
duplex mode. Half-duplex mode causes the audio from the phone to be muted whenever you are
talking; if someone starts to say something that shouldn’t be transmitted, all you have to do is key
up and they will get muted. This is the default mode. In some situations, such as when you have
two radios (one to talk on and the other to listen with) or a radio that can transmit and receive at
the same time (possibly on different bands), you may want to change the autopatch to work in
duplex mode. You can change the mode in the middle of a call, and can select the mode for each
transmitter separately.
Another difference between talking to someone on a repeater versus an autopatch is that the person
using the phone though the autopatch doesn’t care if your audio gets transmitted out the repeater
or not; he is listening to the phone. If you don’t want everyone else that is monitoring the repeater
to hear the things you say while you are talking on the autopatch, you can tell the controller to
mute your audio at those times. That is known as “semi-private” mode. Anyone that is listening to
the repeater while you use the autopatch in semi-private mode will only hear one side of the
conversation, what the person on the phone says. You can turn on a cover tone to be sent while
the person on the radio is talking, or just let it be silent.
<128> p Recall half-duplex and semi-private settings for a port
<128> p h Set autopatch half-duplex mode for a port
<128> p h s Set autopatch half-duplex and semi-private modes for a port
<128> p 0 0 Full duplex mode, not semi-private
<128> p 1 0 Half duplex, not semi-private
<128> p 1 1 Half duplex, semi-private with no cover tone
<128> p 1 2 Half duplex, semi-private with cover tone
Parameters:
- 128 is the default command name.
- P is the port (1..8) that the autopatch call is made or answered from, not port the
autopatch is connected to.
- H is the Half-Duplex on/off setting, 1 for half duplex (the default), 0 for full duplex