VDSL Performance & Tuning

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#929870 9-Nov-2013 10:21

hio77: another interesting read i just stumbled across..

http://juha.saarinen.org/8452

http://juha.saarinen.org/8521

http://juha.saarinen.org/8522

the most interesting bit of all, the date. 27-Aug-2013... reading through it, chorus have willingly disabled DLM, and enforced a 17a profile..

at 14db attenuation too!

"EUBAV-VDSL2-4" wonder if snap will push for that profile upon request for any of us..

I'm not sure that they would turn off DLM TBH, and as evidenced, even a manual push to that profile resulted in the line eventually being pushed back down to 8b, which sounds like DLM at work to me!

SamF

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#929882 9-Nov-2013 10:48

Could someone please post a link to that Chorus VDSL documentation page? I can't find it...

hio77

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Lizard Networks

#929884 9-Nov-2013 10:52

SamF:
hio77: another interesting read i just stumbled across..

http://juha.saarinen.org/8452

http://juha.saarinen.org/8521

http://juha.saarinen.org/8522

the most interesting bit of all, the date. 27-Aug-2013... reading through it, chorus have willingly disabled DLM, and enforced a 17a profile..

at 14db attenuation too!

"EUBAV-VDSL2-4" wonder if snap will push for that profile upon request for any of us..

I'm not sure that they would turn off DLM TBH, and as evidenced, even a manual push to that profile resulted in the line eventually being pushed back down to 8b, which sounds like DLM at work to me!

yeah, after further reading, this was about the time insane tried to use his access, to get his line changed..

still interesting they physically set a profile for a little while there, well after the time inwhich we had said they wouldnt do it..

SamF: Could someone please post a link to that Chorus VDSL documentation page? I can't find it...

ild love to read it too, was hunting for it till the weee hours last night, ended up reading though some really odd ones, none the less, interesting though.

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HiTM4N

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#930034 9-Nov-2013 15:41

Got moved to the "EUBAV-VDSL2-4" profile and line speed went from 23/10 to 41/10!
Line Attenuation also went from 14 to 18 and SNR down from 12 to 9

Love of all phones, computers and gadgets

hio77

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#930054 9-Nov-2013 16:32

they let you move? how..?

17a at your distance, i would have expected some moaning..

might wanna try for EUBAV-VDSL2-1 (assuming the -X signifies the DLM profile..)

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HiTM4N

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#930056 9-Nov-2013 16:50

hio77: they let you move? how..?

17a at your distance, i would have expected some moaning..

might wanna try for EUBAV-VDSL2-1 (assuming the -X signifies the DLM profile..)

I have a mate on the inside lol

Love of all phones, computers and gadgets

hio77

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#930058 9-Nov-2013 17:05

HiTM4N:
hio77: they let you move? how..?

17a at your distance, i would have expected some moaning..

might wanna try for EUBAV-VDSL2-1 (assuming the -X signifies the DLM profile..)

I have a mate on the inside lol

oh well thats cheating!

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Xternal

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#930065 9-Nov-2013 17:42

Here is the old DLM PDF

https://dl.dropboxusercontent.com/u/67367903/DLM.PDF

hio77

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#930066 9-Nov-2013 17:53

Xternal: Here is the old DLM PDF

https://dl.dropboxusercontent.com/u/67367903/DLM.PDF

what a read this is, still reading through.. but one thing thats not mentioned here, which i suspect my line may be in..

theres 12db and 9db SNR profiles, that explains perfectly what i have been seeing since my last resync..

wonder if we can get our hands on the updated PDF..

The line is measured as stable when there are no spontaneous resynchronisations in a 48
hours period. If the line is measured as stable and the following conditions are also met:
> an upgrade profile is available; and
> the noise margin and attainable bit rate are expected to be sufficient after the upgrade,
then DLM will initiate a switch of profile to the next higher profile in the hierarchy.

interesting conditions here..

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Kickass

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#930213 10-Nov-2013 10:41

Just got VDSL installed - i am in an apartment building but less than 300m from the central exchange in Auckland.

How do these stats look? my connection has been up for 42 hours

HiTM4N

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#930218 10-Nov-2013 10:55

hio77:
HiTM4N:
hio77: they let you move? how..?

17a at your distance, i would have expected some moaning..

might wanna try for EUBAV-VDSL2-1 (assuming the -X signifies the DLM profile..)

I have a mate on the inside lol

oh well thats cheating!

It didn't help! Seems DLM disagreed and kicked me right back to my old profile last night :(

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hio77

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#930220 10-Nov-2013 11:07

Kinda surprising. Considering your error rates.

Wvs, can't turn dlm off too.

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Kickass

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#930262 10-Nov-2013 14:56

Kickass: Just got VDSL installed - i am in an apartment building but less than 300m from the central exchange in Auckland.

How do these stats look? my connection has been up for 42 hours

Just remove the wiring on the other jack points and up to 29mbit now! :) anything else i can do?

hio77

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#930272 10-Nov-2013 15:24

whats your spectrum looking like now? for 8db attenuation, its low..

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Kickass

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#930275 10-Nov-2013 15:28

hio77: whats your spectrum looking like now? for 8db attenuation, its low..

A little better... Im using a Fritz! 7306 on 0.55 firmware - is this the best?

A bit disappointed the chorus tech didn't disconnect the other jack points - he just told me 24Mbit is the best ill get..

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