What is a master socket?

A master socket represents the point where the telephone line enters your property and where your broadband signal is at it's strongest.

However, BT will only guarantee a service, whether it is Broadband or Telephone, to the Master test socket.

Testing your connection from the Master test socket will eliminate the internal extension wiring as being the cause of a fault. 

This socket can be found behind the front plastic cover of standard BT (NTE5)  master sockets.

This test forms an important diagnostic step that resolves the vast majority of connection problems.

Where can i find the master socket?

If you have one, it'll be installed at the point where the telephone line enters your property.

This can vary but it's usually one of the following places:

• Around or underneath the front or back windows
• In your comms room
• Next to your telephone system

What's a test socket and how can I find it?
                                                                                                                                                                                                                                                             It's a socket located between the wiring outside and the wiring used to connect internal wiring and extensions to your telephone line.
                                                                                                                                                                                                                                                           You'll only have a test socket if you have an NTE5 master socket installed in your property.

If you an NTE5 master socket, you can get to the test socket by unscrewing and carefully removing the lower half of the NTE5 (See above).