Originally Posted by dragon

A and B on the back of the master socket should be connected to the cable coming in from outside.

There is a specific way around to it but it will usually work either way around, just if you connect the A and B the wrong way it will report a reversal when BT do a line test.



as the ADSL filter has capacitance and the ringing wire can sometimes act like an antenna you can disconnect that if you want just leaving 2 and 5 connected.