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Author Topic: Line 4 fail  (Read 287 times)

Weaver

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Line 4 fail
« on: January 11, 2020, 07:54:34 AM »

Line 4 has gone bad as of 12:00 Friday. Started dropping the link and then silly sync rates downstream, such as 1.75 Mbps instead of ~3.1Mbps. Here we go again. Copper line test and PSTN test show no problems though. Odd.

What else can I look at?

A & A emailed but of course it would happen at a weekend.
« Last Edit: January 11, 2020, 08:25:58 AM by Weaver »
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Weaver

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Re: Line 4 fail
« Reply #1 on: January 11, 2020, 11:51:31 AM »

AA told me:
        >   I've actioned a port flex on this line, we did get a PSTN fault on the KBD but I can't get this detected on the PSTN testing.

I don’t know what a ‘port flex’ is; I’ve heard the term mentioned but I’ve no idea what is means. Can anyone help me to undersatand (in detail)?
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burakkucat

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Re: Line 4 fail
« Reply #2 on: January 11, 2020, 06:29:56 PM »

I don’t know what a ‘port flex’ is; I’ve heard the term mentioned but I’ve no idea what is means.

Hmm . . . It's a term that I have seen used but is not something that I can explain. Perhaps Black Sheep will be able to assist?
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burakkucat

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Re: Line 4 fail
« Reply #3 on: January 11, 2020, 06:39:51 PM »

Line 4 has gone bad as of 12:00 Friday.

Do you mean 1200 hours or 0000 hours? Scrutinising the image from A&A it looks, to me, like 0000 hours.

Quote
What else can I look at?

Just send me (you know the e-mail address to use) a snapshot of the data for that one line and I'll generate the the usual four plots. Once they have been considered then we should have some idea what might have occurred.
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Weaver

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Re: Line 4 fail
« Reply #4 on: January 11, 2020, 08:55:57 PM »

I’ll hold off on bothering you with stats as exhaustion means events have moved on and overtaken me. AA did not mention it to me but Janet noticed an Openreach man lurking near the pole that is immediately below the house.

There are no engineers’ notes in the clueless.aa.net.uk event log.

But …  ;D

Early afternoon things improved dramatically; the packet loss disappeared and downstream sync speed rise to a respectable 2.9Mbps.

So, fingers crossed, it may well be that AA has remotely fixed the problem using deep magic. God only knows how though. ‘Port flexing’ that’s how?

Current status quo as at 20:50 : Live sync rates:
  #1: down 3136 kbps, up 522 kbps
  #2: down 2986 kbps, up 515 kbps
  #3: down 3264 kbps, up 416 kbps
  #4: down 2942 kbps, up 531 kbps


Btw notice an all-time highest ever d/s sync rate record scored by line #3 with 3.264 Mbps. This freak occurrence is something to do with switching kit off when failing to install the new UPS.
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Weaver

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Re: Line 4 fail
« Reply #5 on: January 13, 2020, 10:29:42 AM »

I did mean 1200 hours : I should explain that I was looking at evidence other than that I showed you all; On the modem 3 Johnson SNR-graphing web server’s graph, the downstream SNRM starts deteriorating steadily at that time, starting at the target of 3dB and from 12:00 onwards it is then sliding slowly downwards.



Since Saturday afternoon and AA’s white magic, all has been 100% well although the line remains a bit slow compared to what it was, downstream sync 2.8Mbps, compared with the usual 3.0-3.1 Mbps. That’s annoying and I wonder how to fix it. (Obsessing  :-[  ::)  :-X )
« Last Edit: January 13, 2020, 10:35:22 AM by Weaver »
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burakkucat

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Re: Line 4 fail
« Reply #6 on: January 13, 2020, 04:14:57 PM »

I did mean 1200 hours : I should explain that I was looking at evidence other than that I showed you all;

Ah, that explains it.
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