16QUIET 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 you toignore (not hear) calls from other parties who are using the same channel.When a channel is set up with a QT tone or DQT code, squelch will only openwhen a call containing a matching tone or code is received. Likewise, signalsthat you transmit will only be heard by parties whose QT/ DQT signaling matchesyour transceiver.If a call containing a different tone or code is made on the same channel you areusing, squelch will not open and you will not hear the call. This allows you toignore (not hear) these calls. Although it may seem like you have your ownprivate channel while using QT/ DQT, other parties can still hear your calls if theyset up their transceiver with the same tone or code.OPERATOR SELECTABLE T ONE (OST) (TK-7160/ TK-8160 ONLY)You can change the preset encode and decode tones for the selected channel.Up to 40 tones can be pre-programmed by your dealer.1 Select your desired channel.2 Press the key programmed as Operator Selectable Tone.• “ ” or the OST name or number appears on the display.3 Press the and C> keys to select the desired OST name/ number.4 Use the transceiver the same as in a regular call; press the PTT switch totransmit and release it to receive.5 To exit OST mode and return to the preset encode and decode tones, pressthe S key.