Kenwood TK-3200LU15P Instruction Manual - Page 28

Quiet Talk (QT)/ Digital Quiet Talk (DQT) Quiet Talk (QT) and Digital Quiet Talk (DQT) are functions that reject signals from undesired parties that are using the same channel as you. You will hear audio from the speaker only when you receive a signal that contains a QT tone or a DQT code that matches the one set up on the channel you are using. If a call containing a different tone or code is made on the same channel you are using, squelch will not open and you will not hear the call. Likewise, when you transmit on a channel set up with QT or DQT, the receiving station must have a matching tone or code in order to hear your call. Although it may seem like you have your own private channel while using QT or DQT, other parties can still hear your calls if they set up their transceiver with the same tone or code. The default QT/DQT settings for each channel is 67.0 Hz. 20