You get a twin master socket it fits a standard UK 13A plug back box and is for 2 separate circuits.
2 X 4/1A Flush Mount Twin master Telephone outlet Socket IDC Terminals LJ4/1A
4/1a Twin Telephone Socket Flush Mount (Full Master) BT Line Jack IDC Terminals
4/2a Twin Telephone Socket Flush Mount (PABX Master) BT Line Jack IDC Terminals
BT Twin LJU4/2A Telephone PABX Flush Mount Phone Socket by Kauden LPT
4/4A Flush Mount Master Twin Outlet Telephone Socket White "Screw Terminals"
