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Author Topic: All lines in chaos  (Read 2275 times)

Weaver

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Re: All lines in chaos
« Reply #30 on: August 31, 2019, 02:50:36 AM »

It seems then that ‘clueless.aa.net.uk’ must be doing something funny with the ordering, because I didn’t change it. Perhaps I got something wrong somehow.

Lines 3 and 4 are very very bad just now 2029-08-31T0150. Flapping like mad.
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aesmith

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Re: All lines in chaos
« Reply #31 on: September 02, 2019, 11:01:13 AM »

Lines 3 and 4 are very very bad just now 2029-08-31T0150. Flapping like mad.
The previous test showed a hard fault on Line 3, although apparently not one that stops DSL working altogether.   What does the test show for Line 4?
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jelv

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Re: All lines in chaos
« Reply #32 on: September 02, 2019, 03:42:45 PM »

That image looks really fuzzy to me, horrible. What should I be doing to easily upload an image to <somewhere> so that I can link to it in posts?

You don't need to upload images anywhere!

When composing your post, expand the Attachments and other options and select the image from your PC to attach - it will be uploaded to the Kitz server. It will appear as a thumbnail under your post which when clicked expands to the full image.
« Last Edit: September 02, 2019, 03:48:57 PM by jelv »
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Line rental: Pulse8, Broadband: AAISP Home::1 FTTC 80/20, Mobile: id Mobile

jelv

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Re: All lines in chaos
« Reply #33 on: September 02, 2019, 03:46:04 PM »

If you do want to include the full image in the body of the post, firstly do as I've described above. Then view your post, expand the image and then grab a copy of the image location. Edit your post and include the image like so:



Bingo!
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Line rental: Pulse8, Broadband: AAISP Home::1 FTTC 80/20, Mobile: id Mobile

Weaver

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Re: All lines in chaos
« Reply #34 on: September 07, 2019, 10:21:01 AM »

That is such an excellent tip, btw. Logical thinking.


DLM went crazy this week driving downstream sync rates down to silly low levels, but after forcing a retrain and resetting the target SNRMs then all is well at the moment.

Live sync rates (n.b. 3dB downstream SNRM):
  #1: down 2876 kbps, up 525 kbps
  #2: down 2765 kbps, up 515 kbps
  #3: down 2916 kbps, up 419 kbps
  #4: down 2850 kbps, up 496 kbps
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Weaver

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Re: All lines in chaos
« Reply #35 on: September 10, 2019, 01:47:56 AM »

1. Since Sunday 2019-09-08 the lines have been consistently excellent, with downstream SNRM down-spiking completely gone. This really has been the month from hell. A&A worked very very hard but were perhaps overwhelmed. DLM was a disaster.

2. One new development: for the first time in a year, the daily square wave of upstream SNRM on line 3 has disappeared completely. This has improved line 3’s upstream performance and reliability a lot, and it has made the grouping of upstream speeds closer, since line 3 is now no longer hugely slower than the others, just a bit slower.

3. For some unknown reason, despite this, speed tests on upstream throughput give poor results. Since both the closer upstream sync rate grouping and increased upstream sync rate of line 3 contribute towards improved combined performance then this is unexplained and counterintuitive.



Line 1 SNRM Sun-Mon :





Line 2. Don’t yet know what the 1.5 dB u/s downstep is all about. That remains to be seen. It’s a nuisance though.





Line 3. No more green (upstream) daily square wave:





Line 4:

« Last Edit: September 10, 2019, 02:07:05 AM by Weaver »
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Weaver

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Re: All lines in chaos
« Reply #36 on: September 10, 2019, 02:16:26 AM »

A later shot of line 2, Monday 9 Sep until now Tue 2019-09-10T01:00 UTC

So we have a 1.6 dB high possible daily square wave, which would be a nuisance, if it keeps up. This kind of behaviour was seen on line 2 before, but it was line 3 that was notorious for exhibiting it. So maybe this is a lesser version of ‘the new line 3’ in this respect, if it keeps up.

« Last Edit: September 10, 2019, 02:43:31 AM by Weaver »
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