12HORN ALERTWhen a call is received that has correct DTMF codes or 2-tone signalling, HornAlert causes the vehicle horn or some other external alert to sound. Thisfunction notifies you of a received call when you are out of the vehicle.1 To activate the Horn Alert, press the function key programmed as Horn Alert.2 To disable the Horn Alert, press a Horn Alert function key again to return tothe normal operation.OPERATOR SELECTABLE TONEIf this function is enabled by your dealer, you can change the default QT andDQT tone frequencies. You can select 1 of 16 decode/ encode pairs, that ispreset by your dealer.1 Use Channel Up and Down key to select the desired channel2 Press a key, programmed as Operator Selectable Tone.3 Use Channel Up and Down key to select a desired tone pair.4 Press a key in step 2 again to return to the normal display.PUBLIC ADDRESSTo use Public Address, the optional PA unit (KAP-1) and external speaker mustbe installed by your dealer. This function amplifies audio input from themicrophone and outputs amplified audio from the external speaker.1 Press the function button programmed by your dealer with this function2 Press PTT and speak into the microphone.Note: To adjust the audio output from the external speaker, please use Volume Up and Down keys to getthe appropriete sound.3 To return to the normal operation, press the PA function key again.AUXA control port has been provided for an external board, such as a VoiceScrambler. Pressing the function button programmed by your dealer, activatesor deactivates the AUX port.