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[milgo]

At 18:30 yesterday my DS SNR dropped down from a 14 day stable 6.3 to 5.5 as did the attainable max DS speed from 72308 to 69788.  My limited knowledge of broadband led me to believe that a drop in SNR would correspond to an increase in attainable sync speed and visa versa so with that in mind I am a little confused!  The modem stats still report that neither interleave nor G.INP have been applied to my line.  Would anyone care to comment please? Modem stats can be provided on request.  Thanks.

[spudgun]

Sounds like one of your neighbours has just had fibre installed and you are seeing crosstalk interference from their line.

A decrease in SNR means a decrease in what the modem will calculate as being the maximum attainable speed

[NewtronStar]

We will need to have a look at you DS SNRM graph before and after the event took place, my crosstalk disturber has a very noticeable effect on the DS SNRM by around 4.0dB I can even see them turning off/on their modem on the graph below, notice how they didnt use the 30 minute power off period before powering it up 

[milgo]

As requested

[NewtronStar]

If the SNRM continues at this current value then it does look a slight crosstalk issue you may loose 2530 Kbps on next reboot of the modem but if the SNRM is steady at 5.5dB 24/7 i would not get to worried at the moment, you may see a small increase of errored seconds per day.