With AOL, now owned by Talk Talk, problems with dropping out, ring call centre somwhere in india, very helpful people who speak some form of english and lack any sence of humour, test line a few times all ok their side, refer me to bt, and indian call centre same as above, diagnose talk talk problem, then diagnmose faulty filter, bt send out new one and surprise surprise it was a faulty filter, theyre not designed to last according to google.
as the line from exchange to home is owned by open reach part of bt, unless youre with a virgin, then both will blame each other.