BT is the phone company , and because it will cost them over £1000 or 50 man hours they wouldnt say which one , they wont rtemove it and from what theve said , no internet conection will run down that line and past that "DAX" ....
Dont ask me what one is i dont have a c;ue all i know is i need a new line after ringing oftel our sort of comsumer board for phones in the UK