Thanks to Openreachpeep
To clarify further -
There is nothing connected to any of the extensions
I have tried a number of adsl filters and also a brand new one in different extensions
I bought a new router because I thought the old one had died. The old router has worked on that extension for a number of years now, but neither router works in that extension now (or in any other extension) – only in the test socket of the master socket.
The previous owner (possibly BT) did the extensions, all wiring is well hidden away, the extensions have the old BT logo on them (T).
I have no animals.......but the socket is at low level, but out of harms way. About a year or so ago, Mrs MilnrowLad left a bottle of window cleaner stuff near the master socket which I found evidence of leakage over the socket, but wiped clean thoroughly - The spill was quite small and I don't believe that any got into the socket.
Your suggestion of disconnecting the ring wire - I assume that means that none of phones will then ring? Or I could do it selectively for the “broadband only socket”
The temporary fix of router into the test socket will have to stay for now. I plan to have a look at the extension wiring at the weekend, identify each extension and how its wired back to the master socket. It would appear that there are a number of wires coming out of the master socket - a quick inspection didn't reveal any loose wiring. I'll get my multimeter out and see if I can find any open / short circuits.
Failing all the above I intend to re-wire the extension to the room where I want the router to go.
or recommend me a telecomms engineer in the Rochdale / Oldham area??
MilnrowLad