As a post-script to the post-script: the problem is now - finally - sorted out. It took a further engineer visit yesterday to finally get the problem nailed (and - disappointingly - engineer number 2 didn't seem to have any information at all about engineer visit number 1!). Eventual diagnosis was that a lightning protection device on the line had gone faulty. (No surprise, considering this whole tale of woe started during a thunderstorm
)
Anyway, everything seems good now - I'm back down to 35dB attenuation with no wild fluctuations, and synching at high speeds again. (and as an added bonus, my voice line is now crystal clear - better than I *ever* remember it being!)
However: one more n00bie question ... I'm had a constant connection for about 20 hours now, but if I do a BT speedcheck, it looks like my IP profile is still rock bottom - i.e. 135k. So, my question is this: Does the ip profile value change by itself periodically, or is it only re-jigged each time the router does a re-synch?
Basically, I'm unsure whether I should be sitting patiently for a few days, or recycling the router from time to time to squeeze out a bit more speed.... being shackled at 135k is soooooo frustrating....
