what is cat3 cmx
cat3 cm/cmx is a twisted pair four conductor. This is probably what he has. It is a much better cable than the old red/black/green/yellow phone wire, but they do also sell a cat3 rated twisted pair station wire in the old colors for the weekend warriors.his is probably what he has. It is a much better cable than the old red/black/green/yellow phone wire, but they do also sell a cat3 rated twisted pair station wire in the old colors for the weekend warriors.