Crosspatch 4xradios

Using same fonctions audios in /out for 4 radios we need to patch the audio functions 1 with another one. or three or four all together.
Mostly existing functions we can catch in radios are :
RX audio Ana.Out
TX audio Ana. In
COR in
PTT input Dig.Ground.
Vox.
Gnd.

Question :
1/what will be the best board to use for this application?
2/ can we crosspatch manualy or/& also can be made automaticly when we select 2 or 3 or 4 radios?
3/ there is a possible remote control panel?
4/ any one has any experienec in this app?

Let me know
Regards

1.) What is "crosspatching"?

2.) What do you want the Arduino to do?

Why not ask your radio support people?

Paul

No doubt the original post makes sense to someone, maybe.