Suspected line faults and BTOR charges

[#1]

ReedRichards,
Thank you for your thoughts on this... have been there myself.  Pub's Christmas lights (of which there are indeed lots) get switched on around mid-day and off around mid-night.  This does not correlate with the percieved problem being related to the traverse of the sun over the sky!  
Now I'm wondering if it could be anything to do with the 11th - 14th Dec meteor dust encounter!  Watch out for shooting stars this evening!
Seriously though, I have tried to think of everything along your suggested lines.  All lighting (aside from the two street lights) goes off around mid-night.  There is nothing I can think of that gets switched off around 8am.  Other stuff that gets switched on, is done so before 16:00.
As I write this post, dusk is falling it is 16:20 and the SN has started to fall, been a steady 18.5 / 19 all day and in the last 4 minutes has fallen in steps to 14.5 and is falling a point per minute.
Time to press end (less I loose usable connectivity) and keep monitoring!

Edit 16:35 - link still operational, SN DOWN now dropped to a stable 13dB, perversly, the UP SN has risen 1dB
Cheers,
Kevin

[#2]

That drift down takes place over around 10 minutes.  I would have though that is too slow for something "bad" being switched on and too fast for the general night-time noise attributed to street lights.  Perhaps something being switched on that takes 10 minutes to warm up to its full noisy potential? 

[#3]

I don't have time to respond to this in detail right now, but the problem IS related to some form of discharge (probably street) lighting coming on at dusk and going off at daylight. The interference will not always start instantaneously at the moment the lamp starts up, but it will definitely stop at the moment it turns off.
Edit: As mentioned in a later post, this might in this case have been a premature assumption.
And to clarify "the general night-time noise" is Not attributed to street lights, it's due to increased MW band propagation after dark.

[#4]

Could someone from DCT please have a look to see when the exchange DLM dropped the Target SNRM to 3dB after 21st November, and confirm whether it was DLM or manual adjustment that has now put it at what appears to be 9dB many thanks?

[#5]

Anotherone,
Thank you for your kind and constant help here... do you ever sleep?
The change in SN this morning was somewhat later and longer than of recent days.  It is pouring with rain here...!  Today's transition started around 08:40, rather than 07:53 of yesterday, though yesterday was bright and sunny.  Your last but one post suggetsed that interfrearance from streelighting should cease the moment it switches off - would you therefore expect to see a gradual change in SN or a step change in SN if the problem is indeed related to streelighting?
Is the marked suspectibility to streetlighting interferance an indicator (along with poor performance in wet weather) that there is something physically wrong with the circuit, requiring on the ground resolution?
This morning's graph is attached below.  Speed is a rock solid stroll at 2484!

Cheers,
Kevin

[#6]

Hi townman,
I had a rather busy day yesterday, and a lot that may interrupt responding today. There is rather a lot to address and I'm short of time, so where to start as there are a number of of misapprehensions? I think what I'll do is respond in chunks, starting with my conclusions as to what is probably going on and please don't jump to conclusions just because I haven't reached the stage of explaining a particular point. I hope you enjoyed reading kitz and it has clarified a few things and it hasn't confused you.
You undoubtedly have a source of interference causing your issues after dark. The indications are there isn't an obvious problem with the line, but there could be a modem/router issue as well. To avoid the BTOR charges the title of your thread mentions, you need to try/borrow another modem/router as well as the filter that you have already tried.
Edit: I would normally expect a step change going off which today's clearly isn't.
Edit2: Have you got yesterday morning's graph?

[#7]

The target SNRM has been set at 15dB and has been for prior to 21st November and after, the current profile is 'BT WBC 8M/Uncapped/15dB/Interleaved (ADSL)'.
I've attached a graph of downstream noise for the past 14 days.
-EDIT- Removed graph to avoid confusion. Please see reply 38.

[#8]

Thanks for the response Chris, but reply #11 shows the line profile with a 3dB Target on the ticket (12th Dec.) , which I apologise to townsman for missing initially, the date when this occurred could be very important, you probably need to look at Delta reports and the likes if your would please.
Was the current 15dB set manually or by the exchange DLM? Edit and date/time that this occurred?

[#9]

Ahhhh my apologies, I looked at the account linked to townman's community account.
The profile is now on 'WBC 160K - 24M Medium delay (INP 1) 9dB Downstream, UC Medium delay (INP 2) 9dB Upstream (ADSL2+)' this was changed by the DLM.
Our delta report is still showing the target dB set to 6 so has not caught up yet, and any change has been made by the DLM.

[#10]

Thanks Chris, so the graph you posted won't be applicable, perhaps delete it to avoid confusion. If you could discover when that Target did go to 3dB post the 21st Nov., as I said it could be very important.
@townsman
Apart from yesterday morning's SNRM graph, could you post any sync speed graph where there was a change of sync speed along with the matching SNRM graph. 1620 yesterday is the only one I'm aware of, but just in case there's any other. Also a couple of SNRM graphs from the middle of the night.

[#11]

Quote from: chrispurvey

9dB Downstream

Presumably the connection last lost sync at night (perhaps that's in this thread somewhere)?  So the worst SNR you see is 9dB and it gets a lot better (i.e. higher) during daylight hours.  Thus if you want a faster speed you can force a reconnection during daylight (at the risk of the SNR dropping too low at night) or reconnect in the middle of the "twilight" transition and sacrifice some extra speed for greater noise headroom. 

[#12]

That is not something I would recommend at this time for a variety of reasons, but the primary one being that townsman has reported that he at least has a usable connection at the moment. I'm still waiting the further information before coming to some more conclusions.

[#13]

Quote from: Anotherone

There could be a modem/router issue as well. To avoid the BTOR charges the title of your thread mentions, you need to try/borrow another modem/router as well as the filter that you have already tried. Edit: I would normally expect a step change going off which today's clearly isn't. Edit2: Have you got yesterday morning's graph?

Anotherone and Chris,
Thank you for your prompt replies.
Another router: I do have one, but is is one which I belive to be more susceptible to line problems than my current PN provided (not to me) Thompson TG535V8 - the possibility of purchasing a new router could be on my agenda, though I have not found one that fully fits my needs (research is still in progress).  Requirement is Dual Band WiFi with massive coverage, Dual SIDD, IPv6 compatible, ideally forward compatible with FTTC (no idea when it might come to Runcorn East, but Hartford [home] has it and I expect we will return there within 18 months) also a built-in radius server would be jam on top - any suggestions please?
Step change: Neither was yesterdays!
Graph: Please see below
...grrr thought I had clicked POST on this one this morning!
Cheers,
Kevin

[#14]

and grrr it's telling me attachment not found, but now got it !  And when you've got a moment this late afternoons as well.
In fact having seen the session log from just before 3 pm ish to 5pm ish.

[#15]

A post of your recent connections,
<img src="http://ccgi.psmith12.plus.com/visradius/generated/image13555057994816.png"/>
The last delta report that came through was on the 8th December, so the target SNRM hadn't changed before then.