VDSL Performance & Tuning

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#830117 3-Jun-2013 17:15

Sorry for the spam everyone, just doing some tidyup of the connect data from the thread:

@eXDee & @dan, could you also please confirm your stats for the records?

Attenuation, Distance, Sync, Profile, DLM, CRCPM, SNRM, SNRMT
eXDee: 15db, ?m, 8b, 34996, 1, 0.15, 12, 0
dan: 5db, ?m, 17a, 63256, 1, 1.01, 10, 0?

hio77

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#830118 3-Jun-2013 17:16

SamF: Sorry for the spam everyone, just doing some tidyup of the connect data from the thread:

@eXDee & @dan, could you also please confirm your stats for the records?

Attenuation, Distance, Sync, Profile, DLM, CRCPM, SNRM, SNRMT
eXDee: 15db, ?m, 8b, 34996, 1, 0.15, 12, 0
dan: 5db, ?m, 17a, 63256, 1, 1.01, 10, 0?

er, think you have sync and profile round the wrong way there ;)

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SamF

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#830127 3-Jun-2013 17:25

hio77: er, think you have sync and profile round the wrong way there ;)

Lol, ta. :D

Name: Attenuation, Distance, Sync, Profile, DLM, CRCPM, SNRM, SNRMT
eXDee: 15db, ?m, 34996, 8b, 1, 0.15, 12, 0
dan: 5db, ?m, 63256, 17a, 1, 1.01, 10, 0?

JamesL

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#830154 3-Jun-2013 18:33

Downstream Upstream
FEC: 0 713
CRC: 528 45
ES: 448 44
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0

Modem doesn't show CRCPM though link has been up 5 days, 1 hour and 10 minutes with the above stats

SNRM = 12db, no tweaking

SamF

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#830191 3-Jun-2013 19:29

Thanks James. That's a CRCPM of 0.07 FYI :)

JamesL

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#830246 3-Jun-2013 21:30

Ta, I never was good at math ;)

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eXDee

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#830250 3-Jun-2013 21:39

sidefx: Was there a resync with that change?

Yes there was.

SamF:
hio77: er, think you have sync and profile round the wrong way there ;)

Lol, ta. :D

Name: Attenuation, Distance, Sync, Profile, DLM, CRCPM, SNRM, SNRMT
eXDee: 15db, ?m, 34996, 8b, 1, 0.15, 12, 0
dan: 5db, ?m, 63256, 17a, 1, 1.01, 10, 0?

600m by road.

insane

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#830259 3-Jun-2013 21:54

SamF:
hio77: er, think you have sync and profile round the wrong way there ;)

Lol, ta. :D

Name: Attenuation, Distance, Sync, Profile, DLM, CRCPM, SNRM, SNRMT
eXDee: 15db, ?m, 34996, 8b, 1, 0.15, 12, 0
dan: 5db, ?m, 63256, 17a, 1, 1.01, 10, 0?

Can add mine in there,

insane: 4db, 50m, 53000, 8b, 2, 1.6, 12.8

sidefx

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#830267 3-Jun-2013 22:24

eXDee:
sidefx: Was there a resync with that change?

Yes there was.

Then my guess would be pretty much the same as SamF's - a bug in the firmware where the fritzbox doesn't show DLM2/4 INP properly (though I think most people see the opposite, i.e. 0 instead of 1, but maybe it depends which direction you're going on the DLM scale)

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stevehodge

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#830283 4-Jun-2013 00:09

sidefx:
Then my guess would be pretty much the same as SamF's - a bug in the firmware where the fritzbox doesn't show DLM2/4 INP properly (though I think most people see the opposite, i.e. 0 instead of 1, but maybe it depends which direction you're going on the DLM scale)

Yes, it shows INP as 0 instead of 1, so you think you're on DLM-2 but you're actually on DLM-4.

sidefx

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#830324 4-Jun-2013 09:54

Yeah, but eXDee's phantom change seems to be the other way around - it was showing INP 1 before and after I think? So either it's a slightly different twist on said bug or something new.

Ah well, some good (I think - will have to check tonight) news on my connection. Around 1am last night the errors dropped right off. Since I doubt they would have replace the lamp I wonder if it has blown completely now... will check this evening:

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sidefx

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#830610 4-Jun-2013 17:49

Sadly the errors are back (right on time - around when the street lights came) along with the flickering one. Hmmm... I wonder if maybe it cut out during the night last night or something. Will keep an eye on errors tonight and see if they disappear.

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

eXDee

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#830676 4-Jun-2013 19:58

Would just like note that there wasn't a resync. Apologies, i read some dates of the logs wrong at the time of posting.

It did however make some sort of change without a resync i think. My line is currently sub 300 on the y axis of the unrecoverable errors graph.

SamF

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#830718 4-Jun-2013 21:13

I'm getting an interesting pattern of errors today:

My CRCs are continuing to steadily rise as well.

SamF

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#830764 4-Jun-2013 23:31

Holy sh*t I'm such a geek: :D

The trends are obviously different in actual figures, but the trend pattern is the same; exponential increases in errors, much more so after the 4-5Mbit increase point.

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