In that calculator the lower the atten figure the faster it goes.
The figures used are based on attenuation measured at 300Khz for adsl1
The calculator is based on a default Target SNR of 6dB
In essence it's just saying that the longer your line is (ie the higher the attenuation) the slower your maximum speed will be and giving a guide
, but it's not a simple calculation because the actual
attenuation varies with the speed rather than being the value for the fixed 300kHz that Kitz uses.
If the target SNRM were increased, the speed would go down and so would the actual
The attenuation as reported by the router isn't really a single figure, it's a sort of average over the frequency range being used and can only be measured after
that frequency range has been determined ie when the sync has been determined by the SNR.
There are several inter-dependent variables involved, which makes it a pig of a non-linear calculation to get right!
Edited by billford (Sat 11-Jun-11 10:25:54)