We have just had a kitchen refitted and the BT socket faceplates repaced by an electrician. Prior to this work the sockets in this room gave a dial tone with and without a broadband filter fitted. Now I can only get a dial tone without the filter present. The phone and the filters are fine when placed in other BT sockets in the house. So the wiring in the new faceplates must be incorrect.
Can anyone tell me what may be wrong and what the wiring arangement shoukd actually be?