CONVENTIONAL FEATURES
52
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 s elected. 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 page33) or T/A option switch. When talk-around is selected by
this switch, “TA ON” is flashed on the lower line of the displa y. 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.
Groups may also be programmed so that talk-around cannot be turned
off. If the option switch is then pressed, neither “TA OFF” nor “TA ON”
is displayed. If the menu mode is used in these cases, the current mode
cannot be changed.
Call Guard Squelch
The Call Guard squelch feature eliminates distracting messages
intended for others using the channel. This is done by using a subaudible
tone or digital code to control the squelch. This tone or code is unique to
a user or a group on that channel. It is transmitted with the voice signal
but is not heard because it is in the subaudible range and attenuated by a
filter. Call Guard squelch can be programmed on each conventional
group. LTR operation uses ID codes to perform a similar function.