WinRPR with Xiegu G90 - which cables to get?

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I’m trying to use WinRPR, a Robust Packet software modem, which apparently will only key PTT using either RTS, DTR or VOX. No CAT control. I have two Digirig; one is a rev 1.5 set up for serial CAT commands, not RTS (no solder connecting the RTS terminal to the tip), and the other is a rev 1.9. The cables I’ve got now are the ones for the Xiegu G90 intended only for CAT commands.

Question: should I get the new Xiegu G90 cables intended for use with the rev 1.9 Digirig? Will these support keying PTT with RTS? This is apparently what WinRPR requires.

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Yes, the new 4-pin cables intended for Digirig 1.6 or later have PTT by RTS as one of the lines.

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