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 socket has a black nickel finish and an ultra-slim screwless flat plate that clips on and off and sits flush against the wall, making it ideal for modern interiors.