Sadly not all sockets are wired in the same way. My old house had standard BT sockets but when you removed the faceplate the wiring was a total mess and you definitively would not wish to touch anything without an expert to hand. Heck I don't even know how the BT engineer knew what to do when he put in the first ADSL line all those years ago because everything was mixed up and in unusual places.
I spent a good couple of days without a working phone line after needing to do a trial-and-error session of working out what went where, which followed my first attempt that saw all the wires spring out before I'd had a chance to record their positions. At least the new owner was happy as they took over the only house in the area with good broadband wiring, a point I sold it on .
Mark 'Winter' Jackson
Editor-in-Chief - ISPreview.co.uk