My take on the two stats posts you have made.
Attenuation at 14.6 suggests somewhere around 300m - mine at 16.4dB is around 440m. The line and signal attenuations for D1, D2 and D3 look good and appropriate for the distance.my line has Signal Atten of 40.8dB and Line Atten of 40.9dB which is significantly greater than yours.
Your max attainable is similar to actual.
The SNR margin of 7.1 is a dB higher than standard but not an issue.
It does, to me, point to a VERY noisy line whether it is from cross talk, external noise, a bad/noisy power supply or something in your house causing the problem.
As you have an HG612, can you install DSL stats and then have them uploading to
https://www.mydslwebstats.co.uk/ where we can see the various plots.
/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
M H C
taurus excreta cerebrum vincit