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CONVENTIONAL FEATURES
45
pressed. When the transmitter is disabled by this feature, the busy tone
sounds briefly and “DSBL BSY” is indicated on the lower line of the
display. The monitor mode (see preceding section) is enabled while the
PTT switch is pressed so that activity on the channel can be monitored.
However, it is not possible to access a channel by holding down the PTT
switch (it must be released to make another attempt).
Occasionally, a busy condition may be detected even though no one
is talking. To key the transmitter in this case, release the PTT switch and
then immediately press it again. There is also a programmable option
with this feature to allow transmitting with a busy channel if the correct
Call Guard signal is detected. The Transmit Disable On Busy feature is
enabled or disabled on each conventional group by dealer programming.
Talk-Around
Normally, all transmissions go through a repeater. Therefore, if you
are out of radio range of the repeater, you cannot talk to anyone, even if
you are only a short distance away from the mobile you are calling. To
allow communication if this occurs, the talk-around feature can be used
to enable direct mobile-to-mobile communication without going through
a repeater.
Each selectable group can be programmed for talk-around. It is then
automatically selected when the group is selected. There is no special
talk-around indicator although the group alpha tag on the lower line of
the display may be used to indicate this feature.
Talk-around can also be selected by the TALKARND menu param-
eter (see page 32) or T/A option switch. When talk-around is selected by
this switch, “TA ON” is flashed on the lower line of the display. Then
when it is disabled, “TA OFF” is flashed. Changing the selected system
or group, enabling scanning, or turning power off causes talk-around to
revert to the default condition programmed for the selected group.
Conventional systems can be programmed so that talk-around
cannot be selected. If an attempt is then made to enable talk-around with
the switch, “NO TALK” is flashed on the lower line of the display.