How to wire phone extension socket?

[DaveMHL]

Can anyone point me in the correct direction for adding another BT extension socket? I have done basic extensions before, but in this instance there is one master socket and 3 extension sockets throughout the house. Each of the extension sockets has two pairs of 6 core cable going to it (rather than 4). Are the sockets connected in a ring?

If so, can I spur from one existing phone socket to add another one or would I need to extend the ring?

 

[JohnKay]

Hi Dave
Not really my subject, but have done a good few.
Phone wiring is not done as a ring, and yes you can spur off, or obtain a junction box specially made for the job. Last time I got one, I think it came from Homebase.