Quote Originally Posted by cncmachineguy View Post
I don't know much about them, but how about making one end a "one wire" device. then the smart end could send a OWOUT on each pin.

Or even easier, how about just a loop back plug for 1 end. then you could send a signal out each of four wires and expect it back on the coorsponding wire.
Unfortunately, 1-Wire still needs a common ground.

The loop back plug is a good idea. The only thing I can think of that it wouldn't be able to test is if there happens to be a short across one of the pairs. I don't that's going to happen very often however. If I cant think of anything better, I think I'll probably use that method.