ID of your radio is sent continuously during the voice
message.
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 Chan-
nel with Carrier
You cannot transmit if any traffic
is detected on the channel.
Transmit Inhibit
on Busy Chan-
You cannot transmit on an active
channel with a squelch code or (if
secure-equipped) encryption key
Mode Description
nel with Wrong
Squelch Code
other than your own. If the PL
code is the same as yours, the
transmission is not prevented.
Quick-Key Over-
ride
Your radio must be preprogram-
med to allow you to use 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 preprogram-
med 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.
137
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