Connecting the missing ring wire to your telephone extension socket
Step 7:
Replace the cover to both the BT master socket and the extension socket. Plug one of your BT TwinTalks in to the extension socket you have just fixed.
Plug a phone into the BT TwinTalk at the extension socket you have just fixed. Lift the handset to make sure you can loop the line and hear a dial tone.
Now you can test
your BT TwinTalks, or view the steps again by clicking on the blue arrow: