These can also be used as extension sockets after cutting off the yellow capacitor C1 and the resistor R1 on the circuit board.
BT Type Telephone Master 20 X Socket NTE5a with Back Box 2018 Version IDC A&B
Telephone Master Socket NTE5A Main BT Virgin Media Connection Box
Telephone Master Socket
UK Telephone Master Sockets
2 x Certified Maplin Single Telephone Master Face Plate & Back Box LJU2/4A
2 x Maplin Single Telephone Master Face Plate & Back Box LJU2/4A
