The NTE5 Master consists of a rear assembly and the faceplate. See
this pic.
The incoming cable from the exchange is connected inside that rear part, and as you can see the faceplate plugs into it. Also any extensions have to be connected to the connectors on the faceplate as in that picture.
So the answer to your question is No! The existing socket will not have that internal socket for the faceplate to plug into.
Any bodge you do will be illegal as you would have to disconnect the existing master from the incoming cable. The only correct thing to do would be to get BT to fit an NTE5, which would cost around £200 unless it was done during the fixing of a fault requiring an engineer to attend anyway.
However, I believe complete NTE5 type assemblies can be purchased legally. If you did do anything then I suggest the best faceplate to fit would be a filtered one, such as the
ADSL Nation XTE-2005. (Note that is just a faceplate with no rear assembly to plug into - it assumes you already have that).
Oh by the way - are you dead sure the socket you are talking about is the Master?
Edited by RobertoS (Sat 12-Dec-09 16:55:46)