On Thursday, 27 December 2018 17:11:22 UTC, Broadback wrote:
Check the wiring is not reversed 2345 - 5432 anywhere,
Sorry I did not understand that. :-((


See here

http://www.wppltd.demon.co.uk/WPP/Wi...telephone.html

But the moral remains - I think you still have a wiring fault somewhere and it may be on the fixed wiring or on the phone line cords.

Owain