In article ,
Paul wrote:
I'm in the same situation. I had broadband set up and no change was
made to the old GPO box I have. I rang BT and asked if they would
replace it with a plugin style master socket and I think the cost was
some way over £150 ! Bit reluctant to fiddle with the old box as there
are fragile wires all stuffed in and I'm sure I'd never get them back
in the right place (though if anyone can direct me to a wiring diagram
I guess that might help?)

There are only two wires incoming and three from the master to other
sockets, although it's usual to connect four. You can identify the
polarity of the incoming pair with a DC volt meter.

Here are the standard colours of cable, flex and their terminals.

Old Terminal Cable Cord Function

1 Green/white Orange Spare
Blue 2 Blue/white Red B wire (Line) -50v
Brown 3 Orange/white Blue Shunt wire. (Bell)
Green 4 White/orange Green Local earth (Not usually used)
Orange 5 White/blue White A wire (Line) 0v
6 White/green Black Spare

--
* What do they call a coffee break at the Lipton Tea Company? *

Dave Plowman London SW
To e-mail, change noise into sound.