Hi and thankyou all for your help.
I have had no luck getting the telephone to work since I first posted. I have tried all suggestions, so thanks for that.
I was advised by B&O when I moved to France that the phone may not work outside of the country it was purchased. I tried it anyway and it has been 5 years - ok (except for one blip when we had a storm - but it did come back on after a couple of days). So I am not convinced that is the issue.
Can you buy new PSTN's off the internet as it will be a long drive to find a B&O supplier, here?
By the way, the phone is now displaying 'Not Registered'
.
Thanks again for all your help.
Francis