Basic operation 39Receiving a callWhen you receive a call, your radio may display the caller’snumber and respond in one of two ways, depending on theway it was programmed and the way your network operates.■ On-air call setup: The radio gives a ring and automaticallyaccepts the call. The green LED glows to show that thesystem has assigned a traffic channel.■ Full off-air call setup (FOACSU): When a call is received,the radio rings like a telephone.To accept the call, briefly press the PTT key or lift themicrophone off the microphone clip. The green LED glowsto show that the system has assigned a traffic channel.Once the green LED glows, you can proceed with the call,as follows:1 Hold the microphone about 5cm (2 inches) fromyour mouth.2 Press and hold the PTT key to transmit.3 Speak clearly into the microphone and release the PTTkey when you have finished talking.While you are transmitting, the red LED glows.4 End the call by placing your microphone back onto itshook or by pressing the clear key . The network mayalso end the call if neither you nor the other partytransmits for a predetermined time or if your call timelimit is exceeded.Transmit timerYour radio may have a transmit timer that limits the amountof time you can transmit continuously. When the transmittimer is about to expire, the red LED flashes and the radiogives three beeps.If the transmit timer times out, the call clears down.