On Sep 17, 7:55*pm, "dennis@home"
wrote:
wrote in message

...

However, if I plug the patch cable into the 4-gang wall socket, and an
identical patch cable from the destination 1-gang socket into my
laptop, surely the colour of the wires between the 4-gang and the 1-
gang is irrelevant, provided that the two sockets are wired the same?

No it really does matter.
The signals are very small and they need protection from interference.
Its done by twisting the two wires carrying the signal together.
If you use one wire from one twisted pair and another from a different pair
for a signal there is a lot of interference and it doesn't work
This is what appears to have been done here.

2 should be orange and 1 should be orange and white as indicated by the
colours on the socket.

In fact the brown + brown and white appears to be the only correctly wired
pair.

The tester will still show it as correct BTW as it doesn't actually check
the pairs are pairs.

Awesome. Just what I wanted to know!

Thanks

Edward