It doesn't help that we don't have a simple to evaluate attenuation value for VDSL2 connections (certainly not via the HG612 modem), although an engineer's JDSU does combine attenuation from the 3 DS & US bands into single DS & US values.
From what I have seen of other connections, my attenuation values right across the board would have to be quite a bit lower to achieve higher speeds.
What I unforunately do not have is any attenuation values from when FTTC was installed.
I am convinced that whatever caused my connection to go awol for 4 days last July has never been fully rectified, leaving me with higher attenuation values & therefore susceptibility to "noise interference" than I had at first.
I just can't prove it
Apparently 13.8dB per km is typical attenuation for 0.5mm twisted pair copper cables.
23dB is the lowest DS attenuation value reported from an engineer's JDSU.
Once over, 30.2dB was reported, again from a JDSU.
Edited by Bald_Eagle1 (Mon 07-May-12 22:55:40)