Problem with Noise margin

Luseac

Luseac

Luseac

Soldato
Joined
23 Jun 2005
Posts
3,751
Location
York
Recently my internet has become slow. I had a look on the router status and it initally displayed this:

nm.jpg


So I rebooted the router and I'm now getting a really low noise margin:

nm1.jpg


The internet is still not right, what should I do?
 
Have you changed anything recently, phone wire perhaps?

Are you using Microfilters, one could be faulty. If you have an NTE5 Master Socket from BT and you can plug into the master connection behind it you can isolate your internal wiring.

Got the latest firmware for your router/modem, which brand is it?
 
How recent is 'recently'? If it's just over a couple of days or so I would guess that it is likely to be a problem at the ISP's end - perhaps best to check there are no problems there before streesing over router probs.

Though an update to the latest firmware may be in order for the router
 
I fail to see how an ISP issue can effect local loop noise margin, unless the ISP in question has just started broadcasting AM signals near the OP's house :p
 
What I was getting at is that, post reboot noise margin returns to normal, but speed doesn't - without trying to infer cause and effect
 
I had that happen on my DG834GT occasionally. I'm not sure what causes it but I will point out that I had used 3 different routers on my ADSL line over the period of a few months and it was only the Netgear that did that.

You clearly have a Netgear router and as other people have suggested, I'd be inclined to think it's a bug in the Netgear firmware. What router and firmware version do you have?
 
Phemo said:
Not always. I had the same thing show on my router just after my connection had dropped.
Click to expand...

Exactly.. Connection dropped, router couldn't obtain SNR correctly and defaults to error.
 
Deathwish said:
Have you changed anything recently, phone wire perhaps?
Click to expand...
We haven't changed anything at all.

Deathwish said:
Are you using Microfilters, one could be faulty. If you have an NTE5 Master Socket from BT and you can plug into the master connection behind it you can isolate your internal wiring.
Click to expand...
I am using a microfilter, not sure about the details of the master socket but here's a pic:

telephone-line.jpg


Deathwish said:
Got the latest firmware for your router/modem, which brand is it?
Click to expand...

According to the netgear website I have got the latest version of the firmware. V3.01.25 for the DG834Gv2.

j00ni said:
How recent is 'recently'? If it's just over a couple of days or so I would guess that it is likely to be a problem at the ISP's end - perhaps best to check there are no problems there before streesing over router probs.
Click to expand...
Well i've recently got back from a week's holiday so it's hard to say, but it wasn't perfect before I went.
 
Ok, it appears you don't have an NTE5 (unless that pic isn't your master socket, ie the first one, the main one).

You could try a new filter, a decent one. The XF-1e Microfilter is the best around, worth a shot. I can't tell you where to buy it so don't ask. :)

Other things to try, remove all other phone devices including Alarm systems or Fax machines.

It might be beneficial to have BT install a NTE5 Master Socket ( Click for image of NTE5a ) I think it will cost you £30 from BT, and they are the only ones who can install it, its illegal to get anyone else to do it and could break your contract with BT if you fiddle with it :)

If you get a decent engineer to fit the NTE5, he might be able to tell you if there are any other parts of your wiring system that are faulty, bribe him with a nice cuppa :D
 
Deathwish said:
Ok, it appears you don't have an NTE5 (unless that pic isn't your master socket, ie the first one, the main one).

You could try a new filter, a decent one. The XF-1e Microfilter is the best around, worth a shot. I can't tell you where to buy it so don't ask. :)

Other things to try, remove all other phone devices including Alarm systems or Fax machines.

It might be beneficial to have BT install a NTE5 Master Socket ( Click for image of NTE5a ) I think it will cost you £30 from BT, and they are the only ones who can install it, its illegal to get anyone else to do it and could break your contract with BT if you fiddle with it :)

If you get a decent engineer to fit the NTE5, he might be able to tell you if there are any other parts of your wiring system that are faulty, bribe him with a nice cuppa :D
Click to expand...

Are you sure it isn't a NTE5? It looks a bit like the one in your pic:
socket.jpg


In the mean time i'll go searching for filters...
 
I couldn't find any spare micro filters in the house. What should I do now? My internet is still extremly slow. Should I phone AOL (ISP)? or look at getting that NTE5?
 
Well, it certainly wont harm trying another ADSL Filter, such as the one I mentioned.

Noise Margin doesn't directly effect your line speed, so you could check http://usertools.plus.net/exchanges/ and see if your exchange is currently congested.

Next up would be to use the BT speedtest login, to see if the problem lies with your ISP or with your exchange/computer/router-modem.

Follow this guide on Zen Support for details: http://www.zensupport.co.uk/knowledgebase/article.aspx?id=10383

If the speedtest shows good performance then the problem is likely your ISP, then you should contact them. Good luck with AOL :p ;)
 
Check out this site for info on Master sockets:
*removed due to selling network equipment(filters) (competitor) - J*
 
Deathwish said:
Well, it certainly wont harm trying another ADSL Filter, such as the one I mentioned.

Noise Margin doesn't directly effect your line speed, so you could check http://usertools.plus.net/exchanges/ and see if your exchange is currently congested.

Next up would be to use the BT speedtest login, to see if the problem lies with your ISP or with your exchange/computer/router-modem.

Follow this guide on Zen Support for details: http://www.zensupport.co.uk/knowledgebase/article.aspx?id=10383

If the speedtest shows good performance then the problem is likely your ISP, then you should contact them. Good luck with AOL :p ;)
Click to expand...

Tried another BT filter to no avail. I have ran that bt speed test and got just short of 800k (what I should be getting). So that would mean the problem was with the router?
 
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