<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com
> Here are the two sockets..which is the master socket ?
>
> http://www.jdrsmith.co.uk/telco/telco.htm
They are both master sockets, they both have ring capacitors and opt out
of service resistors. The secondary socket should not have these. The only
difference is that one of them (the lower in your picture) is a PABX
master, it doesn't have the surge suppressor present on the other one.
The incoming two wire cable from the line *should* go direct to the master
socket, then the three wires to the extension socket should run from
there. Whoever installed this didn't do it very well, I can't believe BT
would wire up anything like this, maybe it was the previous occupant..? A
picture of the inside of the junction box you mention would be useful.
Ivor