8SignAling■ Quiet Talk (QT)/ Digital Quiet Talk (DQT)Your dealer may have programmed QT or DQT signaling on your transceiverchannels. A QT tone/ DQT code is a sub-audible tone/code which allows youto ignore (not hear) calls from other parties who are using the same channel.Operator Selectable Tone (OST)If a key has been programmed with OST, you can reprogram the QT/DQTsettings on each of your channels.1 Select your desired channel.2 Press and hold the key programmed as OST for second.3 Press / to select your desired tone or code.• Your dealer can set up to 40 tones/codes.4 Press to save your new setting.5 When you have finished operating using OST, press the OST key again toturn the OST function OFF.■ Radio Access Number (RAN)RAN is a new signaling system designed for digital radio communications.When a channel is set up with a RAN, squelch will only open when a callcontaining a matching RAN is received. If a call containing a different RANis made on the same channel you are using, you will not hear the call. Thisallows you to ignore (not hear) calls from other parties who are using the samechannel.■ Optional SignalingYour dealer may also program several types of option signaling for yourtransceiver channels.2-tone Signaling: 2-tone Signaling opens the squelch only when yourtransceiver receives a call containing matching 2 tones.DTMF Signaling: DTMF Signaling opens the squelch only when thetransceiver receives a call containing a matching DTMF code.FleetSync Signaling: Refer to “Selcall (Selective calling )” on page 4.NXDN ID Signaling: NXDN ID is an optional signaling system available onlyfor digital communications.