VDSL Performance & Tuning

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#976937 29-Jan-2014 22:13

hio77: thoses are part of the new firmware.

AFAIK, both technology's arent used on chrous's vdsl, and Vectoring has been "confirmed" as something that cant happen due to unbundling.

a very borderline connection you have there unfortunately..

Correct, G.INP and SRA are not currently used on the chorus network.

stevehodge

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#976944 29-Jan-2014 22:36

Oriphix: Hi Guys,

I have just got on VDSL and this thread looks like it has lots of experts :)

I have a few more settings which is different from the orignal post which I assume has changed due to firmware etc.

Just to explain these: seamless rate adaptation allows the connection speed to be change without a reconnect. That useful for lines with variable conditions, particularly if the profile has a low SNR margin target. Since Chorus has chosen a conservative SNR margin target seamless rate adaptation isn't very important I think - bitswap alone can deal with most changing line conditions.

Vectoring means coordinating multiple lines so that crosstalk is minimised. It's currently incompatible with local loop unbundling so Chorus haven't implemented it.
G.inp is an improved impulse noise protection standard beyond the INP system from the VDSL/VDSL2 standards.

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#976970 29-Jan-2014 23:14

cool just wanted to check if the false and off was okay lol.

Cheers :)

hio77

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#976973 29-Jan-2014 23:24

Oriphix: cool just wanted to check if the false and off was okay lol.

Cheers :)

could be worth downgrading to see what you can squeeze outta your line, although on longer lines the new firmwares dont have such a hit like they do on shorter lines.

hows your spectrum looking?

odd thing i do note, your line seems to have a sizeable amount of errors on the upload, which is a little unusual..

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Oriphix

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#976998 30-Jan-2014 06:55

could be worth downgrading to see what you can squeeze outta your line, although on longer lines the new firmwares dont have such a hit like they do on shorter lines.

hows your spectrum looking?

odd thing i do note, your line seems to have a sizeable amount of errors on the upload, which is a little unusual..

Here is a image of the spectrum graph

hio77

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#977090 30-Jan-2014 09:47

that doesnt look very pretty at all..

certainly an over distance drop in it, looks like you might pickup a bit more of the receive band 2 but not much..

that RFI is harsh..

just to double check, a Master Filter installation was done and such?

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Oriphix

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#977093 30-Jan-2014 09:52

hio77: that doesnt look very pretty at all..

certainly an over distance drop in it, looks like you might pickup a bit more of the receive band 2 but not much..
that RFI is harsh..
just to double check, a Master Filter installation was done and such?

Yes the Tech did put a black box (that is the filter I assume) in the demark point.

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#977100 30-Jan-2014 09:54

Oriphix:
hio77: that doesnt look very pretty at all..

certainly an over distance drop in it, looks like you might pickup a bit more of the receive band 2 but not much..
that RFI is harsh..
just to double check, a Master Filter installation was done and such?

Yes the Tech did put a black box (that is the filter I assume) in the demark point.

no fresh run of cat5 from the ETP? for the modem jackpoint?

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sidefx

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#977114 30-Jan-2014 09:58

Ouch, such high error rates at "central exchange" looks quite nasty and a bit unusual IIRC?

And yeah, that RFI, have you tried adjusting the fritzbox RFI settings to the left?

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hio77

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#977118 30-Jan-2014 10:00

sidefx: Ouch, such high error rates at "central exchange" looks quite nasty and a bit unusual IIRC?

And yeah, that RFI, have you tried adjusting the fritzbox RFI settings to the left?

central exchange simply refers to it being on the TX rather RX, fritzbox is a little confusing with the way it denotes it in the UI

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Oriphix

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#977212 30-Jan-2014 11:09

hio77:
Oriphix:
hio77: that doesnt look very pretty at all..

certainly an over distance drop in it, looks like you might pickup a bit more of the receive band 2 but not much..
that RFI is harsh..
just to double check, a Master Filter installation was done and such?

Yes the Tech did put a black box (that is the filter I assume) in the demark point.

no fresh run of cat5 from the ETP? for the modem jackpoint?

No.

Front the ETP its just the normal phone cable which is like 10 meters away to the jack point.

I did ask in another thread to see if getting the cable shorter would make a difference they advised it wouldn't.

Didn't know you can run cat5 from ETP to jack point.

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hio77

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#977215 30-Jan-2014 11:12

Oriphix:
hio77:
Oriphix:
hio77: that doesnt look very pretty at all..

certainly an over distance drop in it, looks like you might pickup a bit more of the receive band 2 but not much..
that RFI is harsh..
just to double check, a Master Filter installation was done and such?

Yes the Tech did put a black box (that is the filter I assume) in the demark point.

no fresh run of cat5 from the ETP? for the modem jackpoint?

No.

Front the ETP its just the normal phone cable which is like 10 meters away to the jack point.

I did ask in another thread to see if getting the cable shorter would make a difference they advised it wouldn't.

Didn't know you can run cat5 from ETP to jack point.

CAT3 will do too, CAT5+ is installed for future-proofing..

did they atlest run a separate wire to the jackpoint? splitter isnt gonna do anything if other jackpoints are still on the DSL side..

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Oriphix

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#977231 30-Jan-2014 11:24

sidefx: Ouch, such high error rates at "central exchange" looks quite nasty and a bit unusual IIRC?

And yeah, that RFI, have you tried adjusting the fritzbox RFI settings to the left?

I have it to the right for max performance I think it was.

If i move it to the left for stability does it change much? I copied the diagram on the start of this thread. Will moving the bar to the left make my net slower?

Oriphix

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#977232 30-Jan-2014 11:25

CAT3 will do too, CAT5+ is installed for future-proofing..

did they atlest run a separate wire to the jackpoint? splitter isnt gonna do anything if other jackpoints are still on the DSL side..

Nope they used the existing cable. They just put a box in the demark tested the line and left....

sidefx

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#977234 30-Jan-2014 11:29

I think you really want something with at least twisted pair though.

For the RFI slider - mine made a decent difference to errors one notch to the left, without much change in sync or throughput that I noticed. Most others who tried it didn't see any difference in errors I think, but with yours showing so much RFI I wonder if it might have more effect on the error rate...

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