PTT/CAT connection
Serial
25 pin 9 pin
DTR 20 4 PTT (+10 v = Tx ON)
RTS 4 7 CW (will be soon)
TXD 2 3 CAT RX
RXD 3 2 CAT TX
GND 7 5
This is by default.
"SWAP CW/PTT" setting in MixW allows you to use RTS line for PTT.
Note: both CAT and PTT use same COM-PORT