Fault testing with a line box socket

There are a few simple checks you can make to test if you've got a problem with your line box socket. Please find here a step-by-step guide to checking for faults.

Testing your line box socket:

1. Remove the 2 small screws on the faceplate (see Figure A).
2. Carefully take out the bottom half of the socket.
3. On the right hand side you should now be able to see the test socket.
4. Plug a corded phone you know works properly into the test socket (see Fig B).
5. If the phone works normally then your internal wiring or equipment is faulty.

If you think there's a problem with your internal wiring or equipment:

• Try to find out where the fault is located by checking each piece of equipment in your property by plugging it into the test socket.
• If each piece of equipment works when plugged into the test socket, reattach the face plate and try a corded phone in each extension in the property.
• If you find a faulty extension, you can contact BT on 0800 800150 or a local electrician to fix the problem. You will be charged for this repair.

If your phone didn't work when plugged into the test socket:

• Double check the problem is likely to be with your line by plugging another corded phone into the test socket.
• If you're still having problems you can report your fault online at www.bt.com/faults