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279 posts

Ultimate Geek
+1 received by user: 26


  Reply # 756999 7-Feb-2013 15:55 Send private message

Yes, they'll probably tell you in a couple of days you can't have vdsl on your line





1734 posts

Uber Geek
+1 received by user: 325

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Spark NZ

  Reply # 757023 7-Feb-2013 16:55 Send private message

We'll see how he goes, this time after I uploaded the image to geekzone as it doesn't like the pastes in IE:



Yeah I think a Master Filter may help with the line...

DSL type ADSL2plus (G.992.5 Annex A non-overlapped) over POTS (Fast)

So we know interleaving is turned off.

Sorry I didn't get back to you yesterday, public holiday and all that.  But it seems like you've moved on from Telecom anyway.  Which is a shame to loose you as a customer.




I work for Spark, but as always my views are my own.

19543 posts

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+1 received by user: 1363

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Biddle Corp
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  Reply # 757114 7-Feb-2013 21:12 Send private message

You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..

2440 posts

Uber Geek
+1 received by user: 501

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  Reply # 757127 7-Feb-2013 21:33 Send private message

all that help within 24 hours of posting thread from new user and they go to another company, what a pointless waste of peoples time.
I take my hat off to you knowledgeable guys patience when this happens




Galaxy S5 G900F
Samsung (custom)  KITKAT 4.4.2 

Galaxy Gear 2  Smart watch (great gadget )





19543 posts

Uber Geek
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Biddle Corp
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  Reply # 757132 7-Feb-2013 21:43 Send private message

jeffnz: all that help within 24 hours of posting thread from new user and they go to another company, what a pointless waste of peoples time.
I take my hat off to you knowledgeable guys patience when this happens


I wouldn't say it's a waste of time - but the reality is the performance of the line isn't going to be any better by moving ISP's. Until the bridge tap issue is fixed performance will continue to suffer.


195 posts

Master Geek
+1 received by user: 5


  Reply # 757199 8-Feb-2013 08:06 Send private message

sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.

2652 posts

Uber Geek
+1 received by user: 389


  Reply # 757202 8-Feb-2013 08:23 Send private message

fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


I suspect it is the bold portion (my emphasis) that would need to be resolved. The bridge tap may well be prior to the filter, either in out of the premises.

19543 posts

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Biddle Corp
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  Reply # 757203 8-Feb-2013 08:23 Send private message

fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sure how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


The master filter could easily be dodgy. Regardless of that something is causing a massive line stub which is the likely cause of the OP's issue at present. The fact it's happening at the high end approaching 2MHz creates a chance of very poor VDSL2 performance, if VDSL2 is even provisioned as a 16dB attenuation figure measure from existing modem stats isn't going to deliver good performance, the upstream would be OK but downstream has the potential to be under existing ADSL2+ sync rate.

1734 posts

Uber Geek
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Spark NZ

  Reply # 757204 8-Feb-2013 08:24 Send private message

fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


I'm not sure if the master filter was installed correctly or if there is some other background issue.

Not my problem anymore as the OP has changed providers before any further analysis could be done.

Perhaps it may just be the standard $400 install for a VDSL master filter install.

However if it were me I would have escalated it to the broadband helpdesk tier 3 team to investigate the massive drop in his bitloading as to me that looks like some very funky wiring issue and I think he may be outside the VDSL coverage area.

The OP is on a further journey. Just not with us which is a shame.




I work for Spark, but as always my views are my own.

195 posts

Master Geek
+1 received by user: 5


  Reply # 757208 8-Feb-2013 08:34 Send private message

RunningMan:
fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


I suspect it is the bold portion (my emphasis) that would need to be resolved. The bridge tap may well be prior to the filter, either in out of the premises.


Can you read the first post this has been eliminated splitter and wiring probably better than most of the wiring in the country.  I think before the profile change the modem was syncing higher than it should of and had a low SNR figure but probably the line had a quite a few errors or something compared to now as with that attenuation there is no was he should of got that speed before.  I have only seen that speed with lines less than 100M from the cabinet.

19543 posts

Uber Geek
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Biddle Corp
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  Reply # 757212 8-Feb-2013 08:47 Send private message

fellaintga:
RunningMan:
fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


I suspect it is the bold portion (my emphasis) that would need to be resolved. The bridge tap may well be prior to the filter, either in out of the premises.


Can you read the first post this has been eliminated splitter and wiring probably better than most of the wiring in the country.  I think before the profile change the modem was syncing higher than it should of and had a low SNR figure but probably the line had a quite a few errors or something compared to now as with that attenuation there is no was he should of got that speed before.  I have only seen that speed with lines less than 100M from the cabinet.


The splitter and wiring hasn't been eliminated - just because a master filter is installed doesn't mean that a fault hasn't developed or the filter was installed correctly. Both are scenarios that do occur.

Regardless of anybody else's view of what is and isn't wrong the bitloading graph clearly shows the cause of the problem which is the big blip approaching 2Mhz. There reastically only are a handful of reasons for such a massive blip, and it's likely to be a line stub either on the premises, strong interference from something around 2Mhz that is ingressing into the cable, or a line stub in the Chorus network.

I know wiring and issues like this is something Peter is spending a lot of time on lately and it's a shame for the OP that he has jumped ship from Telecom as he was probably in a situation to have had resources put into his issue to have it resolved.


2186 posts

Uber Geek
+1 received by user: 193

Subscriber

  Reply # 757220 8-Feb-2013 09:21 Send private message

sbiddle:
fellaintga:
RunningMan:
fellaintga:
sbiddle: You'll definately need to install a master filter or sort your wiring out if you want VDSL2 to work, or even to deliver optimal ADSL2+.

That's one seriously big bridge tap showing up the bit loading graph..


Except he already has a master splitter. I am not sur how he was getting those speeds before if the line stats are the same. Still I can't wait to see what VDSL gives him.


I suspect it is the bold portion (my emphasis) that would need to be resolved. The bridge tap may well be prior to the filter, either in out of the premises.


Can you read the first post this has been eliminated splitter and wiring probably better than most of the wiring in the country.  I think before the profile change the modem was syncing higher than it should of and had a low SNR figure but probably the line had a quite a few errors or something compared to now as with that attenuation there is no was he should of got that speed before.  I have only seen that speed with lines less than 100M from the cabinet.


The splitter and wiring hasn't been eliminated - just because a master filter is installed doesn't mean that a fault hasn't developed or the filter was installed correctly. Both are scenarios that do occur.

Regardless of anybody else's view of what is and isn't wrong the bitloading graph clearly shows the cause of the problem which is the big blip approaching 2Mhz. There reastically only are a handful of reasons for such a massive blip, and it's likely to be a line stub either on the premises, strong interference from something around 2Mhz that is ingressing into the cable, or a line stub in the Chorus network.

I know wiring and issues like this is something Peter is spending a lot of time on lately and it's a shame for the OP that he has jumped ship from Telecom as he was probably in a situation to have had resources put into his issue to have it resolved.


And on that, I think the work Peter (along with a myriad of others) does for people on this forum is awesome.

I haven't needed any help (yet), but it is fantastic to know it is there.

Thanks everyone.

2652 posts

Uber Geek
+1 received by user: 389


  Reply # 757225 8-Feb-2013 09:38 Send private message

fellaintga:

Can you read the first post this has been eliminated splitter and wiring probably better than most of the wiring in the country.  I think before the profile change the modem was syncing higher than it should of and had a low SNR figure but probably the line had a quite a few errors or something compared to now as with that attenuation there is no was he should of got that speed before.  I have only seen that speed with lines less than 100M from the cabinet.


I have read the first post.

There is a world of difference between a splitter being installed, and wiring being eliminated. There is nothing to confirm the OP's wiring is better than most of the rest of the country.

There are many reasons why the wiring (including splitter) should be checked. Far from comprehensive, however -

1) Splitter has failed

2) Corroded joints

3) Improper splitter installation

4) Recent work to lines by Chorus - either planned or accidental leading to a bridge tap

3610 posts

Uber Geek
+1 received by user: 890

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  Reply # 757312 8-Feb-2013 13:33 Send private message

Since hes swapped ISPs making this no longer telecoms issue, can i ask about what causes a line to degrade slightly over the years?

Back when i was first cabinetized in 2008, i dont have a screenshot of DMT without a tweaked SNR but i cant quite reach these anymore:


Heres an untweaked list of modem stats anyway:



And now i cant reach that even with an SNR drop:



Is this due to more broadband customers on the cabinet? Has my ADSL splitter degraded over the years?

623 posts

Ultimate Geek
+1 received by user: 97


  Reply # 757329 8-Feb-2013 14:01 Send private message

I've noticed the above too, infact I'm almost at the same point where SNR tweaking gets me to 19mbit now. I used to get ~18mbit sync without tweaking and could get ~21mbit with tweaking. Now I sync at 16mbit and can tweak to 19mbit. Coincidentally, or not, it got lower after a chorus tech was outside digging up the plinth for whatever reason

This has happened over a year and a half, except I only have one jackpoint and no phones so no filter or splitter.

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