A VDSL service in Silverdale is varying every few hours between 2M/1M and 40M/10M with corresponding noise margins down/up 22db/21db and 11db/5db.
Current stats below .. does this instability indicate a line fault or DSLAM or router problem?

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Much higher chance of it been a house wiring issue , Have you reviewed the sticky VDSL thread?
https://www.geekzone.co.nz/forums.asp?forumid=49&topicid=105744
Have you also got the absolute latest firmware on the Draytek?
Michael Murphy | https://murfy.nz
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local wiring has been thoroughly checked out by an expert .. firmware has been upgraded to latest .. this fault did suddenly onset at 3am last Thursday (the day after a big fire just around the corner) .. the copper line seems quiet but perhaps there could be bursts of interference causing this?
" Expert " heard that before
Can you tell us about the setup Naked or clothed Broadband?
yep got clothes .. and a line-monitored alarm, all of which are confirmed to be downstream of the renewed master splitter
You would want the Filter to be downstream of those items as the entire idea of that filter is to separate the two frequencies.

yes that is what I meant
what are the errors like on the modem?
it could be something like the phone line to the modem is running close to a noisy power supply or the modem might just be on its way out
I'm sure your always having issues with these drayteks!
this sounds very much like a loose lead though (given the attenuation changes)
Have you logged a fault?
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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.
hio77:
I'm sure your always having issues with these drayteks!
this sounds very much like a loose lead though (given the attenuation changes)
Have you logged a fault?
Hah thanks for the cheerful observation :-) and yes a Chorus tech on their way.
Actually the attentuation is unchanging (ok +- 1dB) .. it is the SNR which is changing a lot .. image below shows stats at various times over past 2 days ..

you have a heap of errors there by the looks of it
Oh. i misread and thought you said attenuation not snr.
That's normally modem or upstream errors fault causing modem to resync lower to hold a solid sync.
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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.
15 million FEC and 40k CRC plus thousands of other errors
not sure on the uptime for those but thats still an aweful lot
Linux:" Expert " heard that before
Can you tell us about the setup Naked or clothed Broadband?
Rural IT and Broadband support.
Broadband troubleshooting and master filter installs.
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coffeebaron:Linux:
" Expert " heard that before
Can you tell us about the setup Naked or clothed Broadband?
Yeah I think he got that cowboy coffeebaron in to check it out :)
Fixed up the messy difficult to trace wiring and ran new lead from ITP. So now all good on the internal. Popcorn ready for the Chorus result.
well damn, nowonder it's failed.
#include <std_disclaimer>
Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.
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