| reply to tertech
Re: From the ground up!%20.GIF "63056 bytes")
VelCom - SS4200 Long-Term Analysis (2008-Nov, 19-28) | 
VelCom - Siemens SpeedStream 4200 MoDem Reset | 
VelCom - 'DMT v9.01' Capture (End of Test) |
Oh... I didn't think of the MidNight MadNess Syndrome
but most people would use batteries for that, after all!
Well, i do remember that your error rate was significant
(if not severe) so maybe when you observe instabilities
it just might be the case, actually. I wouldn't pretend i
follow laboratory-grade methodology here but i feel that
averaging fifty-thousand-six-hundred samples (one per
fifteen seconds for ten days) as i've done lately should
help to reject marginal events... The most potent ones
can still be equivalent to millions of CRC errors per day
so a few of these will contaminate a curve all right but
they tend to be quite brief and they're easy enough to
recognize anyway. The animated .GIF shown above was
made after marginal events were removed as 'GNUmeric'
won't display the curve's most significant part otherwise:
large numbers completely upset its auto-scale feature as
i explained in a previous post. The rest was done using a
graphic editor (no fancy trick)... My 2nd illustration isn't
well detailed but we can see the counter values may fall
in the four digits range if a MoDem Reset event occurs...
There must be a way to filter out contaminating events
in a spreadsheet but i don't know how to do that. What
we have here is a simple approximation, some educated
guess one might say. The 'DMT' capture was suggesting
an error rate of about 1978 CRC Errors per Day, which is
37 % higher than my estimated 1238 CRC Errors per day,
possibly because of contamination. This pleads in favour
of long-term averaging curves instead of static numbers
once again, in my opinion.
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| N.B.:
The 'PureOS-Light' Live CD with 'GNUmeric'
installed on it is available as an English CD:
'PureOSlight 0.3 beta 1 EN' (Torrent) |
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| %20.GIF "82399 bytes")
VelCom - Thomson ST516v6-2 (2008, Nov-30 to Dec-10) | 
VelCom - Thomson ST516v6-2 vs SS4200 |
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Here's the original 'DSL_StatScope' data with a graphic capture:
%20.GIF)
Click here to enlarge!
The picture is from this thread:
TekSavvy Forum, Yet Another Modem Statistics tool, Bicephale, 2008-Dec-14 |
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1 edit | Have a nice 2009 year everyone...
Looking at this old post i just noticed how the "Sweet Spots" differ:
%20Gif%20Animation%20.GIF)
From the ground up!, Bicephale, 2008-Aug-26
Tones: Register '00' = #40)h
DownStream Bitrate & RCO: Register '00' = #80)h
DownStream SNRM: Register '00' = #C0)h
Of course, the absolute values for Register '00' depend on local conditions...
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'RouterStats v4.8' Setup for GNet GBB2060-Xi (real-life tutorial example) |
I revisited 'RouterStats' lately, it's most regrettable
we don't see it being more popular and especially in
the cases where the MoDem seems to be orphaned
by all of the other 3rd-party trouble-shooting tools!
Isn't it?!...
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%20.GIF)