VDSL Performance & Tuning

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207 posts

Master Geek

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#1794495 4-Jun-2017 11:25

Yup, so frustrating! They won't improve the copper because fibre is coming... and yet it feels like we'll be the last in the country to get fibre! (I'm sure some poor souls will never get it or, or have to wait longer than us).

If my connection is more stable on this firmware I might tweak my router settings as I know I should be able to get more speed from it. I currently have all the options selected for maximum stability instead of speed.

Last month I had 99 re-syncs. Last week I had 11 (most of the week was on the nee firmware), which is a big improvement. If stability is also improved I'll slowly tweak my settings towards speed and find the balance point.

However pretty much every time it rains, my connection drops immediately for a couple of mins, then re-syncs, so clearly water ingress somewhere on the overhead wires or terminations.

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miked

207 posts

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#1794509 4-Jun-2017 11:45

Looking at neighbours speeds on Chorus Checker Map, I see that mine is listed as 12Mbs actual. Next door is listed as potentially 64Mbs. Two doors down listed as 43Mbs actual. So like you say I should be able to get better.

I've got Cat6 to demarcation point fitted by Chorus last year. Naked VDSL with No phones. I'm pretty sure the main problems are external to the property, but is there a way to trigger a profiling of my line? Would it be a good idea? Or should I wait to assess stability first and then tweak router... before trying to trigger re-profiling?

Google Maps suggests line is closer to 200m, but still should have better than this.

Carey

19 posts

Geek

#1810294 1-Jul-2017 23:59

Hi, I'm not sure if this is 'on topic', but there seems to be some pretty good knowledge behind many of the posts so it gives me hope I'll get an accurate answer...

I was on ADSL for ages and the Vodafone and Chorus online address checker never used to allow anything other than ADSL. However, a couple of weeks ago, Chorus showed that I could get 19mbps at my address with VDSL, so I logged into my Vodafone account, and sure enough, the option was there to VDSL for free (I spoke to Sales and they were very positive about it).

So, I've been running VDSL for about 8 days, and throughout the time, my maximum rates are around the 10-11mbps (frequently less at peak times). I was getting 12-13mbps with ADSL previously (for the last few months anyway) so I'm wondering if I should be going back to ADSL.

Here's my HG659 modem stats:

DSL synchronization status:Up
Connection status:Showtime
Upstream line rate (kbit/s): 992
Downstream line rate (kbit/s): 10322
Maximum upstream rate (kbit/s): 1016
Maximum downstream rate (kbit/s): 9902
Upstream noise safety coefficient (dB):6.6
Downstream noise safety coefficient (dB):5.1
Upstream interleave depth:0
Downstream interleave depth:0
Line standard:VDSL
Upstream line attenuation (dB): 16.9
Downstream line attenuation (dB): 35.8
Upstream output power (dBmV): 7.1
Downstream output power (dBmV): 14.6

I was told by a Vodafone 'ninja' that I'm about 2.9km from the cabinet/exchange - I'm in a rural area. I note that now when I go to Chorus address checker, it says I should be on ADSL with a max of 12mbps.

Is this the best VDSL I'm likely to get? Is there any way I can check other options for improving speed?
I'm thinking to go back to ADSL, or possibly go to 4G with a satellite (and accept a data cap..) but VDSL would be good, even if I only reached 13-15mbps speed.

Thanks

Jase2985

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#1810323 2-Jul-2017 07:29

give the distance you are unlikely to get much better.

do you have a master splitter and a dedicated jack point for your modem? if you dont this could give you more speed and better stability. if you cant do this yourself it will probably set you back a couple of hundred dollars.

Carey

19 posts

Geek

#1810338 2-Jul-2017 09:03

The copper line comes into the house, I think there's a very short cat6 patch cable, then the modem. No phone line. Pretty clean connection to modem I'd say.

Jase2985

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#1810342 2-Jul-2017 09:08

ok then there isnt going to be much you could do.

cruxis

470 posts

Ultimate Geek

#1810731 3-Jul-2017 09:40

Chorus tech move me from a ikanos to a broadcom today, with excellent results. After the DLM it will faster than some fibre plans.

hio77

'That VDSL Cat'
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Lizard Networks

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#1810776 3-Jul-2017 11:05

cruxis:

Chorus tech move me from a ikanos to a broadcom today, with excellent results. After the DLM it will faster than some fibre plans.

very lucky to have had that done!

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

SaltyNZ

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#1827587 23-Jul-2017 14:12

Cool story bro time: Our DSL went down about 3am on Thursday night during the storm. This is not particularly unusual but it was annoying because it left the kids with no internet on Friday. I only had time to reboot the modem on Friday morning before heading to work. When I got home, it was pitch dark and pouring rain again. Tried a different phone cable, tried my backup modem, no dice. Call to log fault with Chorus.

Rewind to Sunday: moved the sheep into our house paddock (aka front yard) as the grass in the other paddocks was looking pretty sad whereas the yard was lovely and long.

Back to the present: yesterday afternoon I noticed a stream of sheep suddenly move in the direction of underneath the house when another rainy squall hit. Along with the squall, a hunch hit me. I went to the wall plate ... and sure enough, the cables had all been pulled right out. So, I've just been under the house in the mud and sheep poop poking the cable back into the house and reconnecting it the jack point. Looking forward to still having to pay Chorus for the cancelled callout...

EDIT: Apparently Chorus have already checked the cabinet end so the callout can't be cancelled now, w00t.

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These comments are my own and do not represent the opinions of 2degrees.

hio77

'That VDSL Cat'
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#1827984 23-Jul-2017 22:08

SaltyNZ:

Cool story bro time: Our DSL went down about 3am on Thursday night during the storm. This is not particularly unusual but it was annoying because it left the kids with no internet on Friday. I only had time to reboot the modem on Friday morning before heading to work. When I got home, it was pitch dark and pouring rain again. Tried a different phone cable, tried my backup modem, no dice. Call to log fault with Chorus.

Rewind to Sunday: moved the sheep into our house paddock (aka front yard) as the grass in the other paddocks was looking pretty sad whereas the yard was lovely and long.

Back to the present: yesterday afternoon I noticed a stream of sheep suddenly move in the direction of underneath the house when another rainy squall hit. Along with the squall, a hunch hit me. I went to the wall plate ... and sure enough, the cables had all been pulled right out. So, I've just been under the house in the mud and sheep poop poking the cable back into the house and reconnecting it the jack point. Looking forward to still having to pay Chorus for the cancelled callout...

EDIT: Apparently Chorus have already checked the cabinet end so the callout can't be cancelled now, w00t.

sounds like a baaa-d day for you...

Time to armor clad the interwebs from the sheeies.

Often long as there is 24 hours notice, chorus are all good with calling off a truckroll... better than them arriving and going oh NFF.

generally if it's only been a check done by assure on the cabinet port, not really much harm..

#include <std_disclaimer>

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

Mark

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#1843111 9-Aug-2017 22:30

The DSL Gods seem to be smiling on me! My VDSL connection has jumper to 70Mbit download, 30Mbit upload!

Are Chorus doing any config changes that would account for this nice present ? I thought I had good internet before for living in a rural location :-)

Would my old FritzBox be the limiting factor now ?

hio77

'That VDSL Cat'
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#1843113 9-Aug-2017 22:32

Likely you have jumped to 17a.

in your case, the Ikanos linecard you are on is the limiting factor.

The fritzboxes are cool, they list the imposed max rate limit that the DSLAM sets, so compare those to your current values :)

#include <std_disclaimer>

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

afasthorse

2 posts

Wannabe Geek

#1854674 29-Aug-2017 12:01

Hey guys,

Recently the Chorus broadband checker updated and it now shows me as 25mbps potential up from 14mbps actual before the change (VDSL). Looking at my modem stats I'm still linking at ~14mbps so I'm guessing the potential 25mbps is just chorus taunting me? Looking at the neighbours place (same house, different unit) they're showing at 18mbps actual, any ideas why they'd have a much better link despite being only ~10m closer to the exhange? I've installed a master splitter in the house to no improvement and Chorus has reported "no fault found" on the line. Pretty frustrating as when we moved in to this place Fibre was only a year away but now it's been pushed back to July 2019.

Also after reading through the thread it looks like my line attenuation is ridiculously high for VDSL, would I get better speeds switching to ADSL? Ideally I'd like a boost in the upload speed because 1mbps is frustrating, but I'd take anything.

Here's the stats page from the fritzbox:

and the spectrum:

hio77

'That VDSL Cat'
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#1854706 29-Aug-2017 12:15

Interestingly AVM have buggered up the Bits to Frequency scale there...

I have drawn here what i would expect your line to do with the increased power level of ADSL2+ vs VDSL and assumed 6dB margin is kept.

Realistically, you are probably gaining a few percent in speed on the downstream by being on VDSL aswell as being PTM (so Ethernet all the way rather than ATM)

Upstream you will gain a little more being on adsl2 (Likely 50-100kbps) due to ADSL's much higher power on US0.

IMO, i'd recommend sticking with VDSL.

as a comparison for you, i have two lines at home.

One is ADSL, other is VDSL, both on 6dB profiles (one is interleaved so not a totally fair test but nor is comparing two coppers)

ADSL - 17/1.2

VDSL - 21/1.1

i actually get more consistently better speed over the VDSL link may be down to provider OR the fact that i'm running essentially PTM at a reduced MTU.

#include <std_disclaimer>

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

afasthorse

2 posts

Wannabe Geek

#1854781 29-Aug-2017 13:59

Ah well, thanks for your reply. I guess I just have to hope that the impossible happens and they start on the fibre soon.

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