Are these figure correct between VDSL2 and G.fast?
Mine is according to google map (dsl cable route to the pcp cabinet from back garden to the cabinet - not straight line)
831 ft - 253.1 metres line length - VDSL2 (this the same reported as GEA Test Estimated Line Length In Metres: 253.1
929 ft - 283.1 metres line length - G.fast
or
732 ft - 223.1 metres line length - G.fast
How does signal attenuation relate to wire gauge and distance ?
Attenuation relates to wire gauge and distance (approximately) as follows:
wire gauge thickness @300kHz @68kHz
22 AWG .64 mm 8.62 4.62 db/km
24 AWG .51 mm 11.90 6.65 dB/km
26 AWG .40 mm 13.81 9.37 dB/km
A sensible formula, in common use, assuming 26AWG wire, is:
DS_Atn = 13.81 dB/km * distance
It is important to note that long loop wire thickness is not consistent, it tends to increase with distance from the CO. Thinner twisted pairs are often used underground near the CO while thicker wires are used on long loops in the regions closer to the subscriber location in order to minimize the total loop resistance.
Because most loops are made up of different gauges of wire the Atn/km ratio can decrease (stepwise) with distance and is not a linear function of the loop length.
https://www.speedguide.net/dsl_speed_calc.php