APX
TM
 7500 O5 
38 
Index 
General Radio Operation 
 Receiving and Responding to a Radio Call 
Once you have selected the required channel and/or 
zone, you can proceed to receive and respond to calls. 
 
You see solid red while the radio is transmitting, and 
solid yellow when the radio is receiving a transmission 
(conventional mode only). There is no LED indication 
when the radio receives a transmission in trunking 
mode. 
 
If the radio is receiving a secure transmission, the LED 
blinks yellow.