btw - re
this postYou mean carefully divided by 13.81?
Thats not true.. the maximum speed is calculated using a
much more complicated formula that that.. it took a few days of plotting figures on this graph and uses a sliding scale based on gradients.. then working out the formula to use.
Each dB reading has several calculations performed on it.. and theres various adjustments made depending on the loop loss (12 different stages in fact for adsl1 & many more for adsl2+) and whether its a long or short line.
If I'd simply divided by 13.81 then I could have coded it in a few hours, rather than the days/week that it did take!
I think he may be referring to average dB -> line length calculation and
not the maximum speed calculation.