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Standard User Max_DSL
(experienced) Sun 04-Mar-07 12:31:29
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
You cannot move from max dsl to sky max there and then, it req exchange work you must have been on Mid package .

Stick the url into the browser and increase the snr and you should be stable same as ip profiling in the long run I can provide you with one if you want its the same result a lower sync speed but stable .

HTH

Sky Broaband Max Unlimited ADSL2+

Speed Test - Down 10141 kbps / Up 654 kbps
Standard User jchamier
(experienced) Sun 04-Mar-07 13:19:42
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
Whilst SRA was supposed to be a fix for this issue, its been reported to not be reliable and cause more problems. (Bulldog did some tests before launching). It could be that Sky tested the router with their DSLAMs before launch and found it worse.

The ISP is supposed to set quite a high target SNR margin, for my bulldog connection this is 10db, to allow for the fluctuations you see. This gives me 12mbit sync. I know my line is stable, with no day/night changes, so I locally force my speedtouch to 6 or 7db, giving me useful increase.

If Sky have the target SNR on your line set too low, then either you can try overriding your router locally (which I think you are). I'm not sure if the Sky Netgear remembers any local override after a reboot, which my speedtouch does. Of course you could also talk to support again - with the risks that carries!



--
James on Bulldog Unlimited Plus (ADSL2+) - SpeedTouch 516v6 & Draytek 2900VG
18mbps sync at 820m from exchange - down: ATT 25.0dB, SNR 6.5dB, Pwr 23dB - SpeedTests
Standard User movie
(knowledge is power) Sun 04-Mar-07 13:32:59
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Re: Router does not resync when SNR drops


[re: jchamier] [link to this post]
 
In reply to:

The ISP is supposed to set quite a high target SNR margin, for my bulldog connection this is 10db


Actually, this is wrong. Bulldog set the margin to 6dB by default.


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Standard User jchamier
(experienced) Sun 04-Mar-07 13:47:43
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Re: Router does not resync when SNR drops


[re: movie] [link to this post]
 
Ok, guess the speedtouch is set for 10dB on ADSL2+ lines, perhaps Thompson trying to 'play it safe'. Or my line was adjusted, who knows


--
James on Bulldog ADSL2+ 18mbps - stats - Speedtouch 516v6
Awaiting alternatives on my exchange THFB (Sky and BE due)
Standard User movie
(knowledge is power) Sun 04-Mar-07 14:27:28
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Re: Router does not resync when SNR drops


[re: jchamier] [link to this post]
 
What happened was a great gnashing of teeth and howling from those who prefer to be wrapped in cotton-wool, which caused BD to re-appraise their policy and start setting a default of 8 or even 10. Great times ensued when it was discovered the the Belkin allowed the SNR margin to be reduced.

But I just wanted to point out that saying "the ISP should set a high margin" is something I disagree with
Standard User deleted
(deleted) Sun 04-Mar-07 14:33:42
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
7 sems to be the lowest SNR thats stable.
Standard User deleted
(deleted) Sun 04-Mar-07 15:19:46
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Re: Router does not resync when SNR drops


[re: Max_DSL] [link to this post]
 
In reply to:


You cannot move from max dsl to sky max there and then, it req exchange work you must have been on Mid package .



I know, I migrated to Sky Broadband Max but somehow the profile was set to ADSL1 not ADSL2+, took 9 days to speak to the correct person on a call back and in the meantime due to a misunderstanding they reduced the ADSL1 speed....
Standard User Max_DSL
(experienced) Sun 04-Mar-07 15:30:01
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
Ah Ha

Sky Broaband Max Unlimited ADSL2+

Speed Test - Down 10141 kbps / Up 654 kbps
Standard User deleted
(deleted) Sun 04-Mar-07 15:37:38
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
In reply to:

7 sems to be the lowest SNR thats stable




That is what I find too, when it stalled it reached 6.6 db.

Now I forced a higher margin the lowest I saw last night was 7.4 db, that leaves a reasonable margin so I should be stable now. It does look like Sky sets 6 db as the margin, which seems too low for the router they supply unless their are other factors at work here.

Question is when you sync does the DSLAM bear in mind your previous line stats ie. target SNR 7 db, current SNR 8.6 db, lowest last 24 hours 6.5 db therefore syncing at a speed suitable for the lowest 6.5 db?

Sky must surely be operating some sort of management on this, as I assume most lines have a SNR that lowers in the evening by varying amounts.

Luckily 14448 kbps vs 15323 kbps (15.32 Mbps v 14.45 Mbps) is not much of a speed drop for 24/7 stability, I could probably go a touch higher but with 14818 I was dropping to 7.1 db in the evening which is getting close to an unstable connection...

Please roll on working SRA.
Standard User movie
(knowledge is power) Sun 04-Mar-07 15:54:44
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Re: Router does not resync when SNR drops


[re: deleted] [link to this post]
 
In reply to:

Please roll on working SRA


Are you testing it? Alternatively, have you read it doesn't work (for sure)?
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