Mauricio
aka CigaR
Premium
join:2008-12-06
1 edit | reply to Mauricio
Re: In-depth analysis of line stats
Those stats were from yesterday until 6 am today. Pretty noisy and unstable at night. Perhaps interleave is the only option. The way I see it, a slight noise burst is enough to disrupt the connection even if it had a decent SNR value (13-14).
Those line stats are from a few moments ago. The SNR was quite high and stable for 5 minutes. All of a sudden it drops to -2, hovers a little bit and finally the modem loses sync. Rinse and repeat 20 minutes later.
Overall, pretty bizarre. |
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Bicephale
join:2005-09-24
 ·TekSavvy Solutions..
| Perhaps "bizarre" but at least that's graphically explicit!
I think this passage might help to complete the picture:
Help/Advice with my Line Statistics please, Bicephale, 2009-Jul-7
One instance of 'RouterStats' could suffice, after all:
Help/Advice with my Line Statistics please, Bicephale, 2009-Jul-7
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Bicephale
join:2005-09-24 | Hummm...
Or maybe not!
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Mauricio
aka CigaR
Premium
join:2008-12-06
|  said by Bicephale  :Hummm... Or maybe not! That's odd. RouterStats was able to pull it from the modem this time around...Just can't get the graph the work properly. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| %20.GIF "100268 bytes")
Mauricio - 2Wire |
Maybe they don't refresh often enough.
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Mauricio
aka CigaR
Premium
join:2008-12-06
| I am using the third column 176 DSL uncorrected Blocks. It reports CRCs over time. It is not the total sum of CRCs since the modem has been reset. Here's a graphical representation so far.
I do see a certain pattern. Tell me if it makes sense or not. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| It seems you're on the right track as we managed to get this once:
%20.GIF)
Help/Advice with my Line Statistics please, Bicephale, 2009-Jul-8
In case of trouble DSLRocker or Wayjac might be able to assist but
it looks like you've configured it correctly already!
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Bicephale
join:2005-09-24 | I don't think it's supposed to be "Tx CRC", though...
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Mauricio
aka CigaR
Premium
join:2008-12-06
| said by Bicephale :I don't think it's supposed to be "Tx CRC", though... Yah, it has been fixed.. 
Looks to be working well so far. Time to sit back and relax. |
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Bicephale
join:2005-09-24 | Indeed! Now you can collect the "Before" record to be compared
to an "After" record which will come later, eventually. What's the
sampling rate, by the way?
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Mauricio
aka CigaR
Premium
join:2008-12-06 | No idea. I have been searching for it through the menus for the last 10 minutes. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Maybe it's time to look at this animation once more:
OrbMT on D-Link DSL 2320B, Bicephale, 2009-Feb-22
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Mauricio
aka CigaR
Premium
join:2008-12-06
1 edit | Got it ! Thanks. That animation is fast by the way.. lol
It was set to the default 20 seconds. It is now at 15 seconds. |
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Bicephale
join:2005-09-24 | Yeah, i must look at it for quite a few cycles
just to start remembering how it was myself!
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to Mauricio
I know there's the fear of loosing what you've patiently
accumulated but you'll find it's dynamically configurable:
the display ranges can be adjusted while the application
continues to record, etc...
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Mauricio
aka CigaR
Premium
join:2008-12-06
| Alright. Thanks again Bicephale ! Taking a well-deserved break away from the computer. I will be back later on. It's the modem's time to work hard. |
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Bicephale
join:2005-09-24 | Agreed, significant progress was made today after all!
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Mauricio
aka CigaR
Premium
join:2008-12-06
1 edit | reply to Mauricio
 | 
Up to scale |
CRC count was close to 50 000. Notice the scale ! |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| It reminds me of an old case, the guy finally switched to
cable after he created his own trouble-shooting utility:
%20.GIF)
What does this all mean?, Bicephale, 2008-Oct-22
I'd say you're one of the many persons to find out that their
phone-line has "multiple personalities"! It will complicate your
future attempts to compare noise levels relatively to testing
RF Chokes but the task still seems feasible to me.
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to Mauricio
One comment about the auto-scaling feature in 'RouterStats':
be it a hundred or a hundred thousand RxCRC errors in fifteen
seconds, the effect on your connection is probably the same.
Personally, i "chop the top" in order to make the lesser details
more visible... If, per say, you manually adjust the height to
fifty RxCRC errors per sample then this should preserve most
of the curve's shape while the explosive bursts would remain
visible as a "saturated" section. Moreover, i'm not even sure
that past this level the amplitude is really meaningful anyway
as this could very well correspond to some FirmWare glitch (i
have seen signs of such anomalies before under the form of
discontinuous voids separated by high probability "pockets").
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