20BACKGROUND OPERATIONSYour dealer can activate a variety of transceiver functions to perform without anyadditional operation on your part.TIME-OUT TIMER (TOT)The Time-out Timer is used to prevent you from using a channel for an extendedduration. If you continuously transmit for a preset time, the transceiver will stoptransmitting and an alert tone will sound. Release the microphone PTT switch.SIGNAL STRENGTH INDICATORThe signal strength indicator displays the strength of received calls.Strong Suffi cient Weak Very weakNo icon appears when no signal is available.fl ashes when out of range (NXDN Trunking only).COMPANDERIf programmed by your dealer for a channel, the compander will remove excessivenoise from transmitted signals, to provide higher clarity of signals.BUSY CHANNEL LOCKOUT (BCL)On Conventional channels, if BCL is set up by your dealer, you will be unable totransmit if the channel is already in use. Use a different channel or wait until thechannel becomes free.If BCL Override has been programmed, you can transmit over the current signal:1 Press and hold the PTT switch.• If the channel is already in use, a warning tone will sound.2 Quickly release and then press the PTT switch again.3 Speak into the microphone as you would during a normal call.CONTROL CHANNEL HUNTOn digital Trunking channels, the transceiver automatically searches for a controlchannel.• While searching for a control channel, the antenna icon will fl ash and no signals can bereceived.PTT IDPTT ID is the transceiver unique ID code which is sent each time the PTT switchis pressed and/or released.Note: PTT ID can be made only in analog operation.