46 Operating in conventional modeChecking that a channel is clearYou or your user group may be segregated from other usergroups by special signalling. If an incoming call carries thespecial signalling tones specific to you or your user group,your radio’s signalling mute opens and you can hear the call.The monitor function may allow you to override any specialsignalling on a channel, so that you can check that thechannel is clear before you make a call.Your radio may be programmed to activate monitorwhenever the microphone is off the microphone clip.To activate monitor you may be able to either:■ remove the microphone from the microphone clip, or■ use a programmed function key.Activating monitor by using a function key1 Press the monitor function key to activate monitor andhear any traffic on the channel.While monitor is on, the green LED flashes slowly.2 Press the monitor function key again to turn monitor off,or wait for monitor to turn off automatically, after aprogrammed delay.When monitor turns off, the green LED stops flashing.Your radio may be programmed so that monitor turns offautomatically after a short time.