BT Business Total Broadband Fibre User Manual page 54

Unplug the special extension cable
1
(if installed for your BT Business Total
Broadband Fibre service) from the
top data port on the master socket.
(You'll no longer need this cable.)
2 Unscrew the front plate of the
master socket.
Lift off the fibre faceplate, being
3
careful not to upset any wires inside
the master socket.
52 Your Fibre Hub and Openreach modem