So far I see three suggested settings for setting comm 2 to enable cat control over the RRCs
Hi you should connect to com2 and you should set com2 to mode3, and set 8 databits and 2 stop bits. Same baudrate settings in both RRC, the radio and the pc program
3) Change the COM2 serial settings of the radio-RRC to mode-4, using the baud rate set in the 857, then submit/apply changes.
I see in the manual that the Serial setting for COM2 shows "Logical parallel with COM0. = Is used for level converting for CI-V and FT-8x7."
so which is it?