I decided to remove the "ring wire" from my NTE5 yesterday to see if it made any difference to my broadband speed. I've done this in a couple of previous houses, with some beneficial effect, following guides both here and at kitz. I've also previously replaced an NTE5 with a -5a without any problems, so have some experience of wiring in these sockets.
However, when I took the front off this socket, I found that the wiring was completely different to normal:
orange wire connected to 2
green wire -------"------ 3
white/orange -------"------ 5
The white green wire was wrapped around the outer insulation of the incoming cable and the blue and white/blue wires are connected to the back of the rear part of the socket (the A and B terminals I think?).
The phone has always worked fine and the broadband speed is not bad (~4Mbps at a distance of 2.5km). I disconnected the green 'ring' wire from 3, since I was there but have a question.
Does this make sense to anyone or have I got myself very confused. I was expecting the blue and blue/white to be attached to 2 and 5...
Since everything works, does this mean that the cable at the other end is attached incorrectly? The socket is in an extension so presumably has been added later by wiring in from the original master. Or is it possible that I'm getting speech and data through the other, usually unused, wires somehow? I'm obviously not going to mess around with the wiring now, since it is working and don't BT (although I'm with Sky so not sure if BT have any 'jurisdiction' any more...?).
Back of faceplate
Back of whole box
Thanks for any light that can be shed!!