Motorola 4550 - Manual (Page 50)

Advanced Features
English
40
If your radio is set to Silent with Voice, it will not display any
audio or visual indicators during Emergency mode, but allow
incoming calls to sound through the radio’s speaker. The
indicators will only appear once you press the PTT button to
initiate, or respond to, the call.
Sending an Emergency Alarm with Voice to
Follow
This feature allows you to send an Emergency Alarm to a group
of radios. Your radio’s microphone is automatically activated,
allowing you to communicate with the group of radios without
pressing the PTT button.
This activated microphone state is also known as “hot mic”.
If you press the PTT button during the programmed hot mic
transmission period, the radio ignores the PTT press and
remains in Emergency mode.
NOTE: 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.
Procedure:
1 Press the programmed Emergency On button or the
Emergency footswitch.
2 The display shows Sending Alarm. The green LED lights
up and the Emergency icon is displayed.
3 Once the display shows Emergency Alarm Successful,
speak clearly into the microphone. When hot mic has been
enabled, the radio automatically transmits without a PTT
press until the hot mic duration expires.
4 While transmitting, the green LED lights up and the
Emergency icon appears on the display.
5 Once the hot mic duration expires, the radio automatically
stops transmitting. To transmit again, press the PTT button.
If your radio is set to Silent, it will not display any audio or visual
indicators during Emergency mode, or allow any received calls
to sound through the radio’s speaker, until the programmed hot
mic transmission period is over, and you press the PTT button.
If your radio is set to Silent with Voice, it will not display any
audio or visual indicators during Emergency mode when you
are making the call with hot mic, but allow sound through the
radio’s speaker when the target radio responds after the
programmed hot mic transmission period is over. The indicators
will only appear when you press the PTT button.
NOTE: If the Emergency Alarm request fails, the radio does
not retry to send the request, and enters the hot mic
state directly.

NAG_6880309T15.book Page 40 Tuesday, March 9, 2010 11:47 AM