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All haywire after return from hols ( loads a errurs)

Luzern
Seasoned Pro
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Registered: 31-07-2007

All haywire after return from hols ( loads a errurs)

Before I went on hols mid-August my router was syncing in region of 7500 kbps and noise margin 3 db. As I would be away for a fortnight I disconnected via GUI and after suitable interval turned off the router and the mains switch. On return I powered everything on and was surprised to see that SNRM had increased to ~6 dB and Sync to near 6500 dB.
I thought, “leave well alone and all may recover”, but one afternoon there was, supposedly a bout of noise, since when the router has seemingly dropped out and resynced. In this the interleave depth reported has run through and around every value from 32 to 256; it seems to have no idea where it should be.
Not much after the noise event and the burgeoning of CRCs and Errored Seconds workmen appeared, by whom I was informed that parts of the electrical supply apparatus serving our estate were being replaced as complaints had been received. I knew that was to happen at some time, but the apparatus had never interfered with my connection for more than a year, if not longer.
I’ve attached a PDF of average error rates, where they have been exceptional.
I wish to exclude the possibility that something other than noise (e.g. REIN), so can you please tell me, what you see from your end (hopefully to cover the period before my departure (18/Cool to now? Has, perhaps, my router been damaged, or my line not been able to recover from the events?
Have also used corded phone and there is no noise. Noise margins seem to act as expected, save that on one or two occasions upstream has dipped by as much as 6 dB and errtically recovered within a few minutes. Downsteam seems a little odd as it tends to be ~7.0 dB.



No one has to agree with my opinion, but in the time I have left a miracle would be nice.
14 REPLIES
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
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Registered: 13-07-2012

Re: All haywire after return from hols ( loads a errurs)

Hi lucerne,
I can't see any issues on your line at the moment that has caused the errors, your line has been improved but the DLM has applied a profile to you rline of 3Mb/s - 6Mb/s.
A log or the majority of your connection is below.
<img src="http://community.plus.net/visualradius/generated/image13812456427998.png"/>
Testing you line now shows your line as performing well with few errors, it's just the DLM profile that may be restricting your speeds a little.
It may be worth placing a SNR reset on your line to remove this. Let me know your thoughts.
Luzern
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Registered: 31-07-2007

Re: All haywire after return from hols ( loads a errurs)


Hi Chris! Thanks for replying so soon.
Oh! I forgot to mention that the upstream sync has also been strangely variable, It has ranged 424, 65x to 888.  and stations between.
Probably no more relevant than what was posted before, a mix of ramble and useless detail. Smiley
As to  a reset, if all told you think it safe, please go ahead.
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
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Registered: 13-07-2012

Re: All haywire after return from hols ( loads a errurs)

I've placed a reset for you, let me know how you get on with that.
Luzern
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Re: All haywire after return from hols ( loads a errurs)

Thank you! When will it take effect? Had a resync 50 mins ago 7331 down 888 up down margin 5.7.
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Superuser
Superuser
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Re: All haywire after return from hols ( loads a errurs)

That re-sync would be the reset taking effect.
David
Luzern
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Re: All haywire after return from hols ( loads a errurs)

I had wondered if it could be that quick! Now to see if the 3dB target margin gets restored,
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Luzern
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Re: All haywire after return from hols ( loads a errurs)

I think all is not well. From about 3.30 pm until 6.00 am this morning the router’s telnet shows there were nine resets. Connection speed at 3.00 pm yesterday was 7331/888kbps down/up; at 8.00pm 7026/888; at 8.23pm 6898/763.
There were about three events where the upstream SNR dropped below its average 7.2 dB to ~1 dB, but graph is not available.
ISTM the problem lies with upstream. I shall re-try a QLT with the help of someone of better hearing. After that I suppose it’s the test socket routine, to the joy of SWMBO, but given the intermittence of events I do wonder how effective that might be.
Any further comments are welcome. Smiley
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
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Registered: 13-07-2012

Re: All haywire after return from hols ( loads a errurs)

We can the the drops you've mentioned:
<img src="http://community.plus.net/visualradius/generated/image13814966345373.png"/>
Ideally you need to plug into the test socket when you can to progress/diagnose this.
Luzern
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Re: All haywire after return from hols ( loads a errurs)

Will do! FWIW PDF of SNR overnight is attached,
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
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Registered: 13-07-2012

Re: All haywire after return from hols ( loads a errurs)

It's certainly up and down, the sooner you're in the test socket the better.
Luzern
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Re: All haywire after return from hols ( loads a errurs)

Just waiting now for one of my family to pop round to do QLT with me, as my hearing is not the best ( 2 aids). I will get round to the test socket though Smiley
I had discounted phone problems. However this afternoon the upstream SNR dropped substantially about the time and duration of wife's call to my son, but not, I think exactly. Silly question may be, but when would interference be the most intense; from commencement of dialling to disconnect, or whilst actual call is in progress? I also had this month's BT bill and sometimes SNR is reduced when calling out, but not so much and not always. ould the phone have an intermittent fault?
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Luzern
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Re: All haywire after return from hols ( loads a errurs)

Well, having had such horrible fluctuations in u/s SNR when the phone was in use, I thought maybe the filters were giving up, Once the filters had been replaced the phone usage certainly does not seem to be so much effect on SNR.
In fact since ca.12/10 my snyc has increased to ~7000 kbps on 6dB target SNR, and further to a little over 8000 kbps on 3dB target, all at 47.5 attenuation.
So ATM it's looking good; at least to me!
No one has to agree with my opinion, but in the time I have left a miracle would be nice.
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
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Registered: 13-07-2012

Re: All haywire after return from hols ( loads a errurs)

Things certainly look better on your line from ourside too on your line.
Hope that's now sorted for you.
Luzern
Seasoned Pro
Posts: 2,929
Thanks: 242
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Registered: 31-07-2007

Re: All haywire after return from hols ( loads a errurs)

Thanks Chris Smiley!
No one has to agree with my opinion, but in the time I have left a miracle would be nice.