> Further to my attempt to create a cable IDer. How can I generate a
> unique "code" to be sent along a twisted pair cable? The ID say 1001
> 1001 1001 1001 sent constant from one end would have to be read at the
> far end with a device that could display the code received. So one end
> has a device sending a coded sequence the near end would have to be able
> to READ that code and display on a LCD or LED which code it was
> receiving.

Manchester encoding comes to mind.  5 times a second or so you send a few
sync bits, then the code for that line.

> Then if I can read this info how can I program the far end device to
> send a different code down different outputs?

You don't.  It sends unique codes to all its outputs sequentially.  It
only needs to make a full pass thru all its cables a few times per second.


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