Simply by connecting the green phone socket at the rear of the hub to an existing phone socket with a double ended phone cord.
This is more complicated if you are still on copper (FTTC) broadband rather than full fibre (FTTP) as the master socket still needs to supply the broadband via the incoming copper pair.
If you currently have a master socket with a filtered faceplate (i.e 2 sockets, one for broadband and the other for phone) you have 2 options.
1. Simply unplug the removable faceplate and connect your hub DSL input to the revealed test socket via a filter (to convert the socket type) and then just connect the hub green port to the dangling frontplate. Obviously not an elegant solution if the master socket is visible.
2. Provide a new extension socket adjacent to the existing master and transfer the extension wiring from the faceplate to that and then use the double ended cord to connect to the hub green socket.
