| # PTT Switching Options

RUMlog can activate PTT for TRX #1. The following functions can affect PTT:

- General voice keyer (Preferernces–>Phone–>Playback over the radio)
- Voice keyer in the contest module (Contest-Preferernces–>Phone–>Playback over the radio)
- Fldigi (Preferernces–>µHAM/Fldigi–>Fldigi)

PTT can be controlled using the following methods:

- CAT
- RTS line
- DTR line
- microHAM DKII, micro KEYER II, or micro KEYER III

These settings can be found in Preferences–>TX1–>Transceiver–>For PTT use