I am trying to install a phone point in my study. as long as I have lived here only BT have touched the line. i had a single line with 3 points, i then had one of those points turned into a second line and an extra point added. I wanted to be able to add a point in the study in the future, but at the time it was still a kids bedroom. the BT tech guy said it would only be a matter of putting a different plate on, as there is already a mounting box with a blank plate in the room. having bought a slave plate and removed the blanking plate, i am stuck. there are no wires with coloured banding on them, and there are two cables behind the plate, partly connected to eachother. one seems to be coming directly from outside, a black cable with 4 cores, orange, white, black and green. the other is a white cable with 8 cores. 4 white each twined with another colour; blue, orange, green and brown. the black from the black is connected to the brown from the white. the green from the black is connected to the white (twined with the brown) from the white. the orange from the black is connected to the blue from the white. the white from the black is connected to the white (twined with the blue) from the white. they are connected using those jelly things, so it seems to be a professional job. was i told the wrong thing by the bt tech guy and there is not the ability to connect to the line at this point, because this seems to me to be the wrong end of the master socket, or is it possible to hook it up somehow?