Motorola SL7550 用户手册

To make a call to a group of users, your radio must be 
configured as part of that group.
Procedure:

Select the channel with the active group alias or ID. See 
Selecting a Channel on page page 22.

Hold the radio vertically 1 to 2 inches (2.5 to 5.0 cm) from 
your mouth.

Press the PTT button to make the call. The LED lights up 
solid green. The Group Call icon appears in the top right 
corner. The first text line shows the group call alias. 

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

Release the PTT button to listen.When the target radio 
responds, the LED blinks green,

 

the radio unmutes and the 

response sounds through the radio’s speaker. You see the 
Group Call icon, the group alias or ID, and transmitting radio 
alias or ID on your display.

 If the Channel Free Indication feature is enabled, you will 
hear a short alert tone the moment the target radio releases 
the PTT button, indicating the channel is free for you to 
respond. Press the PTT button to respond.
OR
If there is no voice activity for a predetermined period of 
time, the call ends.

Radio returns to the screen you were on prior to initiating the 
call.

While you can receive and/or respond to a Private Call    
initiated by an authorized individual radio, your radio 
must be programmed for you to initiate a Private Call.

You will hear a negative indicator tone, when you make a 
Private Call via the Contacts list, Call Log, One Touch Access 
button, the programmed number keys, if this feature is not 
enabled.

Use the Text Message or Call Alert features to contact an 
individual radio. See Text Message Features on page 58 or 
Call Alert Operation on page 51 for more information.

Select the channel with the active individual alias or ID. See 
Selecting a Channel on page 22.

Hold the radio vertically 1 to 2 inches (2.5 to 5.0 cm) from 
your mouth.

Press the PTT button to make the call. The LED lights up 
solid green, the radio unmutes and the response sounds 
through the radio’s speaker. The Private Call icon appears 
on the top right corner. The first text line shows the 

NAG-LACR.book  Page 26  Tuesday, January 10, 2012  10:33 AM