Time-Out Timer - Motorola APX 6000XE 2.5 Manual

UTILITIES
 Time-Out Timer
This feature turns off your radio's transmitter. You cannot
transmit longer than the preset timer setting.
If you attempt to do so, the radio automatically stops your
transmission, and you hear a talk-prohibit tone.
The timer is defaulted at 60 seconds.
Note: You will hear a brief, low-pitched, warning tone four
seconds before the transmission times out.
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