I may be wrong here.... but... you get different Attenuation figures when using different types of DSL (due to the different amount of tones used and attenuation over them), therefore would it be safe to say that reading estimated line length results from kitz calculator for ADSL1/2+ would not be same for VDSL2-8c..? hence 1.6Km is estimate for those on ADSL, not VDSL2-8c...
....something like that anyway ..lol
yes, 1.6km is for ADSL, not VDSL2.
we know that Line Attenuation is an 'average' of the attenuation over the tones in use (not the tones available) , so someone on ADSL1 does not have the same line attenuation when on ADSL2+ (especially on shorter lines) because they are using more/different tones, therefore line attenuation figure differs, so it would be safe to assume the line length estimation would differ too when trying to work out line length for VDSL2 from a ADSL calculator
These are the tone bands for my VDSL2 connection:-
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207)
DS: (32,859) (1216,1963)
Due to high attenuation, you can see that my connection is unable to use any of the higher frequency tones at Medley Phase anyway.
Downstream band D1 can use tones 32 to 859, although tones 32 to 95 overlap & "share" with Upstream.
ADSL2+ uses up to tone 511.
I don't know how to reliably calculate what my attenuation would be reported as if only using up to tone 511.
The Kitz calculator suggests 14dB for a 1km line length.
859 = 511 x 1.68
22.4dB = 1.6 x 14 dB
An easy answer would be to multiply the kitz result by 1.6 or 1.7 to give an approximate result for VDSL2 connections when using D1 attenuation values.
That however, seems far too simplistic an approach & highly likely to be incorrect.
However, if the common multiplier was indeed 1.6 or 1.7 (let's say 1.65) when cross-referenced with other users' connections.....................................
