Motorola Astro APX User Manual page 78

3 A high-pitched tone sounds, indicating that the alarm has
been received by the trunked system's central controller.
A dispatcher acknowledgment (four high-pitched tones)
follows, accompanied by an
4 Hold the microphone vertically 1 to 2 inches (2.0 to 2.5 cm)
from your mouth.
5 Press and hold the  button. Speak clearly into the
microphone.
6 Release the  to end the transmission.
7 Press and hold the preprogrammed Emergency button until
a tone sounds to exit Emergency mode.
Turning the radio off also cancels the emergency state.



This feature allows you to send an Emergency Alarm to another
radio without any audio or visual indicator.
display.
Upon acknowledgement, your radio's microphone is
automatically activated, allowing you to communicate with the
other radio without pressing the  button.
This activated microphone state is also known as "".


1 Press the preprogrammed  button to activate
the silent alarm feature.
2 Press and hold the emergency button until a tone sounds to
exit the silent alarm mode.
If silent emergency alarm is used with emergency call, pressing
the PTT button exits the silent mode and initiates the
emergency call.
If you press the PTT button during hot mic, and
continue to press it after the hot mic duration expires,
the radio continues to transmit until you release the
PTT button.