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Disconnections - Noise Margin 2147483646 db

N/A

Disconnections - Noise Margin 2147483646 db

Over the weekend i asked for Interleaving to be turned off on my line, Today i have had about 20 connections in the past few hours. I dont know if the fact i asked for Interleaving to be turned off has anything to do with this, but these are my line stats below:

ADSL Link Downstream Upstream
Connection Speed 2720 kbps 448 kbps
Line Attenuation 50 db 15.5 db
Noise Margin 2147483646 db 20 db

As you can see the noise margin is showing up as 2147483646 db. Anyone have any ideas what is wrong?


Edit: Just refreshed it, and now it says:
ADSL Link Downstream Upstream
Connection Speed 2720 kbps 448 kbps
Line Attenuation 50 db 15.5 db
Noise Margin 0 db 20 db
12 REPLIES
Community Veteran
Posts: 1,931
Thanks: 4
Fixes: 1
Registered: 01-08-2007

Disconnections - Noise Margin 2147483646 db

You dont by any chance have a netgear DG834G do you?? I had one of these, and its a symptom of a negative SNR. In fact these routers are notorious for incorrectly displaying the SNR. Mine used to resync constantly in response to these SNR levels. There is a new firmware out, that I think adresses these issues. My solution was to get a speedtouch router, but thats maybe a bit drastic, as many people never have a problem with netgears, and they have a reputation of being able to hang onto poorer lines better than others.
N/A

Disconnections - Noise Margin 2147483646 db

Yes, i have a DG834G v3. I had upgraded the firmware earlier to see if it would solve the problem, yet no hope. I got this router about two weeks ago because my other one was not capable of speeds above 1mb. I dont want to be buying another one so soon.
Community Veteran
Posts: 26,357
Thanks: 607
Fixes: 8
Registered: 10-04-2007

Disconnections - Noise Margin 2147483646 db

Which firmware version have you upgraded to? You need to be on 3.1.31
jelv (a.k.a Spoon Whittler)
   Why I have left Plusnet (warning: long post!)   
Broadband: Andrews & Arnold Home::1 (FTTC 80/20)
Line rental: Pulse 8 Home Line Rental (£13/month)
Mobile: iD mobile (£4/month)
N/A

Disconnections - Noise Margin 2147483646 db

Im currently on V4.01.20.

I have the v3 of the DG834G which does not support earlier firmware versions.
http://kbserver.netgear.com/products/DG834Gv3.asp
Community Veteran
Posts: 26,357
Thanks: 607
Fixes: 8
Registered: 10-04-2007

Disconnections - Noise Margin 2147483646 db

Ah right.
jelv (a.k.a Spoon Whittler)
   Why I have left Plusnet (warning: long post!)   
Broadband: Andrews & Arnold Home::1 (FTTC 80/20)
Line rental: Pulse 8 Home Line Rental (£13/month)
Mobile: iD mobile (£4/month)
lunarjetman
Grafter
Posts: 59
Registered: 31-07-2007

Disconnections - Noise Margin 2147483646 db

It may be nothing to do with interleaving being off. My line is interleaved and I had the misfortune to have to use a DG834G v3 (with latest firmware) for a few months. These routers (and Linksys - same chipset) are notorious for their wandering SNR if you have a long and noisy line. They sync nice and high in the day, then the SNR drifts down from 6 inexorably to 0 and beyond over the next 2 or 3 days until they give up the ghost and drop, usually at the point that is most disadvantageous to your connection speed.

My solution was also to replace it with a SpeedTouch 585v6 which holds the ADSL connection on my long and noisy line like a champion.
Community Veteran
Posts: 1,931
Thanks: 4
Fixes: 1
Registered: 01-08-2007

Disconnections - Noise Margin 2147483646 db

Rossnet

Thats exactly what I did. Also you can use the DMT tool, to manually adjust the SNRM. I made mine sync at around 10dB one morning, and now even in the evening, SNR never really goes below 5dB. Sync rate is 5894kbps, with interleaving on.
N/A

Disconnections - Noise Margin 2147483646 db

I bought this from Ebuyer only two weeks ago because my other router (Origo AWR8210 - Which held the connection fine) was unable fo reaching speeds above 1mbps.

I spent over £50 on this, and cant afford to fork out another £50 for a router that should work fine.

Is there nothing i can do? I doubt ebuyer would take it back.

Please note, i never had a problem with this router until today, its appeared to work fine for the two weeks i had it, good speeds and little to no connection drops until now!
lunarjetman
Grafter
Posts: 59
Registered: 31-07-2007

Disconnections - Noise Margin 2147483646 db

Unless you have an obvious local source of noise that is disrupting your line (such as dodgy extenstion wiring etc) and which can be eliminated I would suspect the answer is no.

It's annoying I know because I too have been through a list of routers as long as my arm trying to find one that is stable on DSLMax. You could always ebay the Netgear and put that towards the cost of another router.

Have you tried unplugging your extensions, changing your filters and plugging into the test socket? if your own wiring is causing wild fluctuations all of a sudden that might explain it.
Plusnet Staff
Plusnet Staff
Posts: 12,169
Thanks: 18
Fixes: 1
Registered: 04-04-2007

Disconnections - Noise Margin 2147483646 db

We can try switching interleaving back on again, it looks like the interleaving order completed early this morning so I wouldn't be surprised if that was the cause. At 50dB attenuation the line is quite long and the zero and negative SNR figures certainly aren't good.

I would very much recommend putting interleaving back on and see what it's like afterwards as I suspect that's what's causing the disconnections.
N/A

Disconnections - Noise Margin 2147483646 db

Hello dtomlinson, Would i be charged for this service? If not, i would appreciate if it could be reverted back to how it was, as i did have a stable service with it on, however at the moment its unusable, as it takes me about 5-10 minutes to get back online properly, and then it disconnects again.
Plusnet Staff
Plusnet Staff
Posts: 12,169
Thanks: 18
Fixes: 1
Registered: 04-04-2007

Disconnections - Noise Margin 2147483646 db

No charge, I've put the request in. Should be done in the morning but can sometimes take a couple of days to take effect.