VDSL Performance & Tuning

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856 posts

Ultimate Geek

#915697 15-Oct-2013 20:17

I was syncing quite low (30-39). Reterminated the splitter and everything else, just went from 8 to 17a at some point over the last week. Haven't been watching.
I did not request a resync.

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hio77

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Lizard Networks

#915700 15-Oct-2013 20:24

Psilan: I was syncing quite low (30-39). Reterminated the splitter and everything else, just went from 8 to 17a at some point over the last week. Haven't been watching.
I did not request a resync.

1 week to move to 17a with no DLM reset requested? good to know.

what was up with your splitter? bad tech installation?

as for my connection, since lines still hitting highish errors, snap have now started a 24 hour monitor, will see how that comes out tomorrow.

seems the CSR i spoke to wasnt too quick on the .22 firmware, but worked out the slight difference there, ran through all my settings and pointed out i didnt catch the 2am restart config.

gotta love it how snap are quick off the mark on sorting things when its all in their control, simple request, got a simple answer and was done. if only chorus was that easy!

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Psilan

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Ultimate Geek

#915703 15-Oct-2013 20:27

hio77:what was up with your splitter? bad tech installation?

as for my connection, since lines still hitting highish errors, snap have now started a 24 hour monitor, will see how that comes out tomorrow.

seems the CSR i spoke to wasnt too quick on the .22 firmware, but worked out the slight difference there, ran through all my settings and pointed out i didnt catch the 2am restart config.

gotta love it how snap are quick off the mark on sorting things when its all in their control, simple request, got a simple answer and was done. if only chorus was that easy!

I can't really be sure what went wrong. I did all my internal wiring myself. I was switched over, then Tech just came in and attached splitter and I went from 3-4db attn to 27+.
I wasn't out of service at any point, Snap did everything they could, and Chorus were great.

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Lizard Networks

#915705 15-Oct-2013 20:29

Psilan:

I can't really be sure what went wrong. I did all my internal wiring myself. I was switched over, then Tech just came in and attached splitter and I went from 3-4db attn to 27+.
I wasn't out of service at any point, Snap did everything they could, and Chorus were great.

ah ok, well your 17a looks very nice there!

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stevehodge

393 posts

Ultimate Geek

#915763 15-Oct-2013 22:14

Psilan:
Receive Direction Send Direction
Max. DSLAM throughput kbit/s 70000 10360
Min. DSLAM throughput kbit/s 360 360
Attainable throughput kbit/s 67072 29384
Current throughput kbit/s 66808 10344

Latency 8 ms 8 ms
Bitswap on off
Impulse Noise Protection 0.0 0.0

Signal-to-noise ratio dB 13 31
Line attenuation dB 6 102
Carrier record A43 A43
Profile 17a

BOOYA!

Congrats! Nice upstream attainable - it's interesting to see what we'd be getting if it weren't capped (mine just says 0). How are the error rates?

stevehodge

393 posts

Ultimate Geek

#915766 15-Oct-2013 22:18

stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

insane

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#915781 15-Oct-2013 22:22

stevehodge:
stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

Then anyone in UFB zone with VDSL wouldn't switch and Chorus would go bankrupt. At least that's what John thinks

VDSL is a non regulated service, its not going to happen.

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hio77

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Lizard Networks

#915790 15-Oct-2013 22:39

insane:
stevehodge:
stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

Then anyone in UFB zone with VDSL wouldn't switch and Chorus would go bankrupt. At least that's what John thinks

VDSL is a non regulated service, its not going to happen.

how many people in a UFB zone have vdsl.. i suspect it would be somewhat limited (thoses who have gone to the likes of 'ultra vdsl' because "gee`, the ads say this is fast!" may not apply to this thinking ild say though.)

then again, if i was in a fiber zone, and could only afford 30/10 fiber vs my vdsl thats probably 40+/10 ild say the later would be the winner too..

stevehodge:
stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

if only.. maxing that 10mbit upload is far too easy..

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HiTM4N

256 posts

Ultimate Geek

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#915792 15-Oct-2013 22:45

apparently where are no where near the limits of VDSL
something like 150down 100up at 1-2km

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Psilan

856 posts

Ultimate Geek

#915793 15-Oct-2013 22:48

stevehodge: are the error rates?

Zero errors on DSL. A few on the Fritz box. Might post a screenshot later.

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hio77

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#915795 15-Oct-2013 22:58

HiTM4N: apparently where are no where near the limits of VDSL
something like 150down 100up at 1-2km

depends alot on the implementation from what i understand.. if you look at countries basing their network upgrades of FTTN, they are starting to rollout vectoring. this helps kill crosstalk, and thus sync rates increase (ild assume attenuations would drop a little too at the upper end.

http://www.gazettabyte.com/home/2012/11/9/vdsl2-vectoring-explained.html

worth a bit of a read.

as it stands right now, that 10.8db limit is there from what i understand to avoid too much crosstalk at the point where vdsl is deemed not worth using, anyone over that point, are lucky they got in on the borderline really..

this limit seems to be a tad more relaxed overseas, where you seem to see more demand for faster uploads rather than bulk of the concentration landing on download speeds...

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HiTM4N

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#915796 15-Oct-2013 23:09

hio77:
HiTM4N: apparently where are no where near the limits of VDSL
something like 150down 100up at 1-2km

depends alot on the implementation from what i understand.. if you look at countries basing their network upgrades of FTTN, they are starting to rollout vectoring. this helps kill crosstalk, and thus sync rates increase (ild assume attenuations would drop a little too at the upper end.

http://www.gazettabyte.com/home/2012/11/9/vdsl2-vectoring-explained.html

worth a bit of a read.

as it stands right now, that 10.8db limit is there from what i understand to avoid too much crosstalk at the point where vdsl is deemed not worth using, anyone over that point, are lucky they got in on the borderline really..

this limit seems to be a tad more relaxed overseas, where you seem to see more demand for faster uploads rather than bulk of the concentration landing on download speeds...

yeah with my 15db currently, i must sit right on the edge

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stevehodge

393 posts

Ultimate Geek

#915804 15-Oct-2013 23:18

insane:
stevehodge:
stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

Then anyone in UFB zone with VDSL wouldn't switch and Chorus would go bankrupt. At least that's what John thinks

VDSL is a non regulated service, its not going to happen.

If that's the reasoning then why do they allow 70 Mbps downloads (more than double entry level fibre plans)? If you want to push people to fibre it would seem logical to cap the side which people generally care the most about, i.e. downloads.

stevehodge

393 posts

Ultimate Geek

#915805 15-Oct-2013 23:20

HiTM4N: apparently where are no where near the limits of VDSL
something like 150down 100up at 1-2km

You'd need a 30a profile for that. I think you could get close to 100/50 with 17a though.

hio77

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Lizard Networks

#915806 15-Oct-2013 23:22

stevehodge:
insane:
stevehodge:
stevehodge: it's interesting to see what we'd be getting if it weren't capped

And on that topic, anyone know if Chorus are likely to relax the limit? They allow fibre plans with higher upload so it doesn't seem like there is any reason for the VDSL limit to be so low.

Then anyone in UFB zone with VDSL wouldn't switch and Chorus would go bankrupt. At least that's what John thinks

VDSL is a non regulated service, its not going to happen.

If that's the reasoning then why do they allow 70 Mbps downloads (more than double entry level fibre plans)? If you want to push people to fibre it would seem logical to cap the side which people generally care the most about, i.e. downloads.

yep, 9 times outta 10, someone who cares about upload speeds will go fiber at the drop of a hat from vdsl..

#include <std_disclaimer>

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

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