First off you should not be meddling with the Master Socket. If you screw it up expect a (large) bill from Openreach.
There are only two incoming wires, A & B. IIRC connect the wires with -50v DC to B and the one with 0v DC to A.
If you are wring an extension to a Master socket, connect the Blue and White wire to connector 2 and the White and Blue wire to connector 5. Connect NO OTHER wires. they are not needed and can affect ADSL (Broadband) speed.
I assume you are talking about a telephone socket, but your post really doesn't give much of a clue.
I THINK you want to wire a telephone extension socket.
We may have found other answers which could help you.