Smart PTT Feature (Conventional Only)
Smart
PTT
is a per-personality, programmable
feature used in conventional radio systems to keep
radio users from talking over other radio
conversations.
When smart
PTT
is enabled in your radio, you cannot
transmit on an active channel.
If you try to transmit on an active smart-
PTT
channel,
you hear an alert tone, and the transmission is
inhibited. The LED lights up solid yellow to indicate
that the channel is busy.
The following table shows the variations of smart
PTT
:
Mode
Description
Transmit Inhibit
on Busy
Channel with
Carrier
You cannot transmit if any traffic
is detected on the channel.
Transmit Inhibit
on Busy
Channel with
You cannot transmit on an active
channel with a squelch code or (if
secure-equipped) encryption key
other than your own. If the PL
Mode
Description
Wrong Squelch
Code
code is the same as yours, the
transmission is not prevented.
Quick-Key
Override
This feature can work in
conjunction with either of the two
above variations. You can
override the transmit-inhibit state
by quick-keying the radio. In
other words, two
PTT
button
presses within the
preprogrammed time limit.
Transmit Inhibit
This feature is available for APCO 25 trunking, Type II
trunking and Conventional operations for all APX
radios.
When Transmit Inhibit feature is enabled, the radio
stops all transmission including voice and data. The
radio could receive messages but not replying the
acknowledgement request of the received message.
User could physically control the transmission of the
radio especially during operation in hazardous
environments with this feature. An environment is
considered hazardous when the power emitted by the
Advanced Features
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