12 Basic Operationdisplay, along with the current channel name e.g.REGION2.2. Press the up and down keys ( / ) toscroll through the list of available channels, untilthe control head display shows desired channelname oruse the keypad (0 to 9) to enter the new channelnumber.3. Press the enter key ( ) to initiate the call.Note: You cannot change channels whiletransmitting.Selecting aGroupA group is a collection of channels groupedtogether for scanning or voting. Select a group thesame way as a channel.Receiving aCallYour radio remains muted until there is valid trafficon the channel your radio is currently on.The BUSY indicator in the control head displayappears when there is traffic on the channel,although the radio’s squelch and programmed mutefeatures may prevent you from hearing the traffic.See “What You Hear on a Channel” on page 14.Consult your system manager or the person whoprogrammed your radio about the special signalingoptions programmed in your radio.