This master telephone socket from British General uses a screw terminal connection and should be used where your telephone line enters your property. This is the best place to connect your router as it’s where you’re most likely to get the best performance and fastest speeds for your broadband. If you have more than one socket, the master socket is the one that will feed any extension sockets. This black nickel finish socket has a sleek and slim profile, with softly rounded edges to add a touch of luxury to your décor.