A guide to BT telephone sockets — John Lewis Broadband
Any ideas for disguising a BT socket half way up a wall and next to some water pipes? (This is the dumbest place they could have put both of these things…) :
How do I test from the BT Master Socket?
Check your wiring and set-up - double socket | BT Help
How to wire a phone extension from a BT Master socket UK - YouTube
Master socket help - Community home
HSEAMALL One BT Plug to Two UK BT Telephone Socket Adapter Splitter Doubler Splitter: Amazon.co.uk: Electronics & Photo