User's Guide

Advanced Features
English
61
Using the Digital PTT ID Feature‡
This feature allows you to see the radio ID (number) of the radio
from whom you are currently receiving a transmission. This ID,
consisting up to a maximum of eight characters, can be viewed
by both the receiving radio and your dispatcher.
Your radio’s ID number is also automatically sent every time the
PTT button is pressed. This is a per-channel feature. For digital
voice transmissions, your radio’s ID is sent continuously during
the voice message.
Using the Smart PTT Feature (Conventional Only)
Smart PTT is a per-personality, programmable feature used in
conventional radio systems to keep your radio 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.
Three variations of smart PTT are available:
Selective Switch
You hear any digital traffic having
the correct network access code
and correct talkgroup.
Option Result


Transmit Inhibit
on Busy Channel
with Carrier
You cannot transmit if any traffic is
detected on the channel.
Transmit Inhibit
on Busy Channel
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
Override
This feature can work in conjunction
with either of the two above variations.
You can override the transmit-inhibit
state by quick-keying your radio. In
other words, two PTT button presses
within the preprogrammed time limit.
APX_3000_M1.book Page 61 Wednesday, December 5, 2012 11:04 AM