ivADVANCED OPERATIONS ........................................................................... 16DTMF (DUAL TONE MULTI FREQUENCY) CALLS ................................ 16TRUNKING CALLS (ANALOG) ............................................................... 16EMERGENCY CALLS .............................................................................. 17SCRAMBLER ........................................................................................... 17SIGNALING .............................................................................................. 18CLOCK ..................................................................................................... 19LCD BRIGHTNESS .................................................................................. 19HORN ALERT .......................................................................................... 19PUBLIC ADDRESS (PA) .......................................................................... 19BACKGROUND OPERATIONS ..................................................................... 20TIME-OUT TIMER (TOT) .......................................................................... 20SIGNAL STRENGTH INDICATOR ........................................................... 20COMPANDER ........................................................................................... 20BUSY CHANNEL LOCKOUT (BCL) ........................................................ 20CONTROL CHANNEL HUNT................................................................... 20PTT ID ...................................................................................................... 20VGS-1 OPTIONAL VOICE GUIDE & STORAGE UNIT .................................. 21VOICE RECORDER ................................................................................. 21VOICE GUIDE .......................................................................................... 22