Motorola XPR 7550 用户手册

The LED lights up solid green.

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

 Wait for the PTT Sidetone 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.

See Making a Group Call on page 27 for details on making a 
Group Call.

A Private Call is a call from an individual radio to another 
individual radio.

Procedure:
When you receive a Private Call:

The LED blinks green.

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

To respond, hold the radio vertically 1 to 2 inches (2.5 to 5.0 
cm) from your mouth.

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 free for you to 
respond.
Press the PTT button to respond to the call.
OR
If the Voice Interrupt feature is enabled, press the PTT 
button to stop the current call from the transmitting radio and 
free the channel for you to talk/respond.

The LED lights up solid green.

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 28 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.