"Bill" wrote in message
...

WHAT????????????????????????

Sorry but I can't think of anything else to say.

Is there a cordless DECT or similar phone plugged in upstairs? Therefore
you are cutting the power to its base unit. Surely you don't mean that a
plugged in normal phone stops working when you turn the power off do you?

Yes I do - I may be daft but not THAT daft. I was shocked too!! The only
explanation I could think of was that it goes through the alarm somehow
(it's only the upstairs extension which goes off - all the sockets
downstairs continue to work as normal).

Daz