viiiSIGNALING .........................................................................................17OPTIONAL SIGNALING ...............................................................17OPERATOR SELECTABLE TONE (OST) .....................................17FleetSync ............................................................................................18SELCALL (SELECTIVE CALLING) ................................................18STATUS MESSAGES ....................................................................20CALLER ID STACK .......................................................................21SHORT MESSAGES .....................................................................21GPS REPORT ...............................................................................21VOICE OPERATED TRANSMISSION (VOX) .....................................22VOX OPERATION .........................................................................22VOX GAIN LEVEL .........................................................................22ADVANCED OPERATIONS ................................................................23TRANSMIT POWER .....................................................................23DIRECT CHANNEL ENTRY ..........................................................23CALLING ALERT...........................................................................24KEY LOCK.....................................................................................24SEND THE GPS DATA .................................................................24EMERGENCY CALLS ...................................................................24TALK AROUND .............................................................................25VOICE SCRAMBLER ....................................................................26MONITOR/ SQUELCH OFF ..........................................................26TRANSCEIVER BACKLIGHT........................................................27DIRECT ZONE CHANNEL ............................................................27BACKGROUND OPERATIONS ..........................................................28TIME-OUT TIMER (TOT) ..............................................................28BATTERY SAVER .........................................................................28BATTERY POWER INDICATOR ...................................................28SIGNAL STRENGTH INDICATOR ................................................28BUSY CHANNEL LOCKOUT (BCL) ..............................................29COMPANDER ...............................................................................29PTT ID ...........................................................................................29