WS switching on s-video via KAT5

[graham_howe]

I have recently found out (sorry if everyone already knows this)
that in the US and Japan it is common for WS switching signal to be
passed on the chrominance pin of s-video much like we do it with a
normal scart connection. Now if I have such a signal on an s-video
cable and i put that through an s-video din plug to scart plug
adapter and then into KAT5 and then reverse the process at the other
end, will the switching signal be retained? Alternatively is it
possible to have KAT5 units with s-video din sockets rather than
scart sockets and would the switching signal be retained there?

Thanks

Graham