APX 4500 O2 CH 
39 
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 Receiving and Responding to a Radio Call 
  Receiving and Responding to a Talkgroup Call 
GENERAL RADIO OPERATION 
To receive a call from a group of users, your radio must be 
configured as part of that talkgroup. 
 
Procedure: 
 
When you receive a talkgroup call (while on the Home 
screen), depending on how your radio is preprogrammed: 
 
1  ASTRO Conventional Only: 
    The LED lights up solid yellow. 
    The display shows the talkgroup alias or ID, and the caller 
alias or ID. 
 OR 
    Trunking Only: 
    The display shows the caller alias or ID. 
 
2  Press the PTT button to respond to the call. 
    The LED lights up solid red. 
 Release the PTT button to listen. 
 
Accy No-Dot 
Button (Purple)* 
Accy 1-Dot Button* 
Accy 2-Dot Button* 
PTT