Motorola XPR 5550 用户手册

button to stop the current call from the transmitting radio and 
free the channel for you to talk/respond.

The green LED lights up.

Wait for the Talk Permit Tone to finish (if enabled) and 
speak clearly into the microphone.

Release the PTT button to listen.

If there is no voice activity for a predetermined period of 
time, the call ends.

You hear a short tone. The display shows Call Ended.

See Making a Private Call on page 23 for details on making a 
Private Call.

An All Call is a call from an individual radio to every radio on the 
channel. It is used to make important announcements requiring 
the user’s full attention.

Procedure:
When you receive an All Call:

A tone sounds and the green LED blinks. 

The Group Call icon appears in the top right corner. The first 
text line shows the caller alias. The second text line displays 
All Call. Your radio unmutes and the incoming call 
sounds through the radio's speaker.

Once the All Call ends, the radio returns to the previous 
screen before receiving the call. An All Call does not wait for 
a predetermined period of time before ending. 

 If the Channel Free Indication feature is enabled, you 

hear a short alert tone the moment the transmitting radio 
releases the PTT button, indicating the channel is now 
available for use.

See Making an All Call on page 24 for details on making an All 
Call.

NOTE: The radio stops receiving the All Call if you switch to a 

different channel while receiving the call.