WHAT is considerd normal??

[dr.grimm]

last week i had a spike in my dB noise margins. my ADSL 384 line use to have a margin of 12dB noise, but now it is at 31dB. what is consider normal?

telkom was here today (on a Sunday) to come check it out, conclusion NO PROBLEM...duh

please anyone have advice??

 

[fz1]

"Noise Margin" isn't named intuitively. Perhaps you are thinking that a higher noise margin is a bad thing. In fact, the higher your noise margin (or "Signal to Noise"), the better.

Have a look at: http://mybroadband.co.za/vb/showpost.php?p=1239914&postcount=7

From that page, you will see that your particular noise margin is in the 'outstanding' category Previously, it was in the 'good' category. So, this spike you have experienced is in the right direction (upwards)

On the other hand, attenuation is something that should be as low as possible. What are your attenuation figures?

One thing you may want to do is monitor your noise margin over a period of time to make sure it is it not wildly fluctuating. You can use a program called RouterStats to do that. Or, you can just leave it be if you have no problems (and Telkom confirms)

 

[dr.grimm]

Thanks man...

my attenuation stats are as follows:

12 dB - upstream


9 dB - downstream

so what does this mean then??

 

[Just_Ice]

Those are good stats. Low att. and high noise margin, thats what you want and thats what you got.

 

[fz1]

Those are good stats. Low att. and high noise margin, thats what you want and thats what you got.

Yep! So, it's a good thing that your stats suddenly changed (improved!)

Just out of interest, what is your upstream noise margin?

Also, if you ever decide to get a faster speed (e.g. 4Mbps, or even 8Mbps if/when it comes out), your stats show that you should be able to support those speeds without any issues (noise margins decrease as speeds increase).

 

[dr.grimm]

my upstream noise margin is at 12dB...