Motorola ASTRO XTL 2500

ASTRO XTL 2500 Digital Mobile Radio with M5 Control Head 61
Conventional Radio Features
Smart PTT
Smart PTT is a per-mode feature that gives the system manager
better control of radio operations. When smart PTT is enabled in your
radio, you will not be able to transmit on an active mode. If you try to
transmit (press the PTT button) on a busy or active smart PTT
channel, a continuous tone sounds until you release the PTT button,
and the transmission is inhibited.
The yellow BUSY LED lights when the radio is receiving to indicate
that the mode is busy.
Three radio-wide variations of smart PTT can be enabled on your
radio:
Conventional Talkgroup Calls
Digital Modes Only
This feature allows you to define talkgroups for your conventional
system. Talkgroups, combined with selective squelch operation, allow
groups of users to transparently share a conventional channel.
Talkgroups can be slaved to a personality through programming, or
you can select them.
Encryption keys are slaved to talkgroups. When conventional
talkgroups are enabled, encryption keys are changed by changing the
active talkgroup.
Transmit Inhibit on
Busy Mode with
Carrier
You will not be able to transmit if any
activity is detected on the mode.
Transmit Inhibit on
Busy Mode with
Wrong Squelch Code
You will not be able to transmit on an
active mode that has a squelch code other
than your own.
Quick-Key Override You can override either of the two previous
transmit-inhibit states by quick-keying the
radio (two quick PTT button presses).