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-
nel with Wrong
Squelch Code
You cannot transmit on an active
channel with a squelch code or (if
secure-equipped) encryption key
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
Mode
Description
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 can receive messages but is not able to reply
the acknowledgment request of the received
message.
User can 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
radio power amplifier could initiate an explosion or
other dangerous reactions.
When the Transmit Inhibit feature is disabled, the
radio functions according to its normal operations.
The radio sounds alert tone when user enters or exits
this feature and also when PTT is pressed.
Advanced Features
82
English
