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Topic # 59437 6-Apr-2010 11:36
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Hey guys im now on adsl 2+ profile how ever my sync rates are same as my adsl 1 , I do notice the attainable rates are adsl 2+ , so whats the deal guys ? does it take couple days or something to fully switched over? anyways heres my stats on RTA1320

same result on my dlink 504t adsl 2+ aproved modem , reset , restart ..
plan telecom big time plan interleaving off




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  Reply # 315272 6-Apr-2010 11:43
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Tried an "isolation" test, ie: unplug all land line devices other than the modem from all jack points and restart the router and see if the sync speed improves?

Other questions:

- How many jack points in your house?
- Filters on all the phone devices, or master filter/splitter?
- Do you have a monitored alarm?



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  Reply # 315292 6-Apr-2010 12:59
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HI thanks isolation test same sync rate but higher attainable rate , was on the phone , worse scenario was that my cabinet could be bridged to another cabinet then to the exchange? he changed all profiles and still got the same rate.. chorus we be over tomorrow to test everything out.Cry





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  Reply # 315312 6-Apr-2010 13:40
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no central filter , 4 phone jacks only 1 used with filter for phone and adsl. we have alarm which im very sure its not monitored.

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  Reply # 315330 6-Apr-2010 14:17
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Does not matter if it monitored or not, just the fact its across the line is enough

Cyril



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  Reply # 315338 6-Apr-2010 14:52
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cyril7: Does not matter if it monitored or not, just the fact its across the line is enough

Cyril


do i needto check something or could that be the problem then?

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  Reply # 315346 6-Apr-2010 15:10
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The issue could be a range of issues, and that could be one. If you have Chorus coming to check out your line then they will quickly identify the speed to the demarc, if its significantly greater than what you have now then go looking, but as per my usual advise, there is no better solution than a central filter (unless you have a naked connection).

Cyril

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  Reply # 315488 6-Apr-2010 20:23
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I found in a house i visited the other day, a set of 40 year old ringer bells in the customers hallway. It didnt work anymore but it was still hooked up. They were about 4.8km from the exchange so when i snipped the wires, the speed went from 120k down to 250k down. Alarms that are no-longer monitored have a similar effect.  




Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

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  Reply # 315492 6-Apr-2010 20:37
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(Please excuse the new guy*)

That looks very much rate limited rather than a noise issue (but see the *)


* New guy that needs to learn how Chorus manages line profiles, and the NZ way of doing adsl.

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  Reply # 315495 6-Apr-2010 20:41
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Hi, I also could be wrong, but the modem is reporting exceptional good noise margin, not bad. It also could be trying to indicate a problem, but with 12dB attenuation its does not combine to make an out of order combination

Cyril

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  Reply # 315582 6-Apr-2010 23:30
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Wait the Dynalink is showing "Noise Margin", NOT "Signal to Noise Ratio"... pretty sure that should be 12 dB on Telecom's normal profile (or 6 dB on Orcon or Vodafone if he was on gear in the exchange).

Higher Noise Margin means more buffer to protect the ADSL actual signal if I recall correctly.

Wouldn't 30ish dB "Noise Margin" indicate he's on a conservative profile, probably a hang over from before cabinetisation?



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  Reply # 315586 6-Apr-2010 23:47
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Signal to Noise Ratio (SNR)
This is the ratio between clean / clear (good) signal to background Noise (Bad)

Signal to Noise Margin (NM or SNM)
This is a buffer that allows for stability

@D33ZZ can you post a screenshot after clicking "more information", that will show a bunch more stats, atm error rates etc.

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  Reply # 315610 7-Apr-2010 02:23
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Ragnor: Signal to Noise Ratio (SNR)
This is the ratio between clean / clear (good) signal to background Noise (Bad)

Signal to Noise Margin (NM or SNM)
This is a buffer that allows for stability

@D33ZZ can you post a screenshot after clicking "more information", that will show a bunch more stats, atm error rates etc.

I dont think any consumer grade modems get the distinction correct in their web interface. Thompsons (the older ones atlest) had the correct values via telnet

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  Reply # 315675 7-Apr-2010 10:05
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That's a good point.

The Linksys AM300 I'm using primarily at home at the moment does report Noise Margin correctly, I think I have a Dynalink RTA1320 too that I might check later.



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  Reply # 315814 7-Apr-2010 17:10
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Hey guys well last night i rang them to turn off or on my interleave which I heared does a profile/port reset? well first thing in the morning restarted the modem and now its now showing the aproriate stats , i cancelled the technician. stats just now.









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  Reply # 315843 7-Apr-2010 18:43
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For the record, there's a direct correlation between SNR and sync rates.
ie: With 12db, I sync at ~5800k/~10000k on two different lines. At 7db, ~6500k/11000k.

As long as the SNR is ~6db at a minimum, on a half-decent line a high SNR is a bad thing.




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