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[kitz]

>> my billion router still reported 45db attentuation on Wednesday but today, the 546 is reporting 53db.

attenuation normally relates to line length, but there are other things that can affect attenuation.  Such as aluminium joints on the line.. or a HR fault.

Different routers can measure attenuation differently - depending whether its averaged..  or taken at a specific frequency. 
ADSL2+ normally sees an increase in an attenuation over ADSL1 due to the fact that adsl2+ has a much larger frequency range in use.. and its not unusual to see an increase of around 3dB.

[kitz]

>> I also enclose a shot of the diagnostics page from the 2700hgv as it contains a bit loading chart.


The graph seems to show some frequencies were the signal is poor..  theres a small gap at tone 160..  and some further on at around 205 - 215ish.
These dips will correlate to the SNR levels at those frequencies.   One of the usual causes is some sort of ElectroMagnetic Interference.

[waltergmw]

@ Holmbase,

When you mention the dip about an inch in, which I presume is the gap at tones 31 & 32, I suspect that is the gap between the upload and download portions of the tones used.
If so, it would not have any effects elsewhere ?

Kind regards,
Walter

[orainsear]

In the stats 2700HGV is showing a downstream attenuation of 48.6 dB @ 300 kHz - perhaps a bit more realistic?

I think that tone 160/161 is around the radio 5 frequency of 693 kHz.

[roseway]

I think that tone 160/161 is around the radio 5 frequency of 693 kHz.

Yes, that one seems pretty common. I see it on my own connection. I guess that Radio 5 Live transmitters are all over the place and quite powerful.