havent read the whole thread...so sorry if Iam late with this... but don't certain Dslam's /Msan's use some tones for communication to the router and not for data transfer? my neighbours BT ADSL2+ looks identical to my dads Talk Talk LLu ADSL2, same tones disabled, on my old o2/LLu connection there were a whole bunch together in the upper part of the spectrum..