vADVANCED 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