I’ve recently installed, at a customers home, a very high speed digital subscriber line 2 (VDSL2). BT’s fibre to the cabinet (FTTC) service is the basis of its BT Infinity service. BT do, however, resell this service to some less crappy ISPs. Mine is a business line provided by ISP Spitfire. Here’s how it works:
Telephone wiring services will come and install a new faceplate on your socket. This stacks on top of your existing faceplate and has a cut out in the bottom so that the engineer does not need to disconnect any extensions you have on the socket. The installation is quick and was done within 7 days of booking it.
The faceplate is a filter which splits the phone signal as it comes into your house into VDSL2 and regular phone. It presents you with an RJ11 socket (not RJ45, as a lot of forums are saying) for VDSL2 and a standard BT 431A phone connector.