Bicephale
join:2005-09-24
 ·TekSavvy Solutions..
2 edits | reply to dslrocker3
Re: Help/Advice with my Line Statistics please
If you've been told that you could "bypass" your house wiring
by connecting directly at the demarcation point then now you
learned the truth about it: it's fundamentally wrong because it
doesn't account for the "antenna effect" of your wiring hidden
behind walls - which can amount to a couple hundred feet in a
private home!... Centralized filtering eliminates confusion, long-
term noise curves reveal daily patterns if any and hence point
at potential local issues. Thomson's SpeedTouch 5x6 combined
to TerTech's 'DSL_StatScope' professional-grade utility is quite
the most user-friendly way available to acquire a better overall
perspective of the situation... Beware of SNR Margins as these
can remain stable for days if not weeks and never give a single
clue about what's really taking place. 'DMT' captures are great
for a quick start, "Diagnosis" mode is powerful when it becomes
more serious but 'DSL_StatScope' is much less involving, IMHO.
This is TerTech's 'DSL-StatScope' thread, for your convenience:
%20.GIF)
Yet Another Modem Statistics tool, Bicephale, 2009-Apr-10
Addendum:
Oh, and 'DSL_StatScope' can record logs which other
readers can "PlayBack" and examine as they see fit.
Also, this short thread illustrates the next step:
The customer's own wiring, Bicephale, 2007-Jun-13
Red is bad, green is good... |
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dslrocker3
join:2002-05-26
Toronto
4 edits | It's interesting how you talk about an antenna effect. When I troubleshooting years ago, I decided to change some of the wiring in the house. I removed some wiring that was causing a problem (maybe a staple in through the wire?) and ran a new line up to my modem.
I wasn't willing to drill through the floors and walls so what I did was bridge from a downstairs jack with cat5e to where I wanted to place my modem on the second floor. The downstairs jack where my connection is bridged acts very strangely. To get the best connection and to get the second floor jack up to par with the other jacks throughout the house, I have to plug in an extension cord into the first floor bridged into jack (and it has to be a certain, specific cord for some reason) and it must be left unfiltered with no device hooked up to it. This adds about 0.5 dB attentuation but gives a better connection. So I guess this all means that less attentuation/least amount of wiring is not always better, depending on many factors. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| When i moved in, my MoDem couldn't be located conveniently
so an HPNA EtherNet extender is the solution i chose to avoid
wiring issues which i just didn't want to address back then. It
would be profitable to remove everything but the DSL device,
electrically speaking - which means using Centralized Filtering
is a must if you haven't tried it yet! Long phone cabling can't
but cause trouble, if it helps that's because something is dead
wrong, as i illustrated in one of the linked threads from above.
In the end, what you should go after is lower noise and hence
fewer disconnections. It doesn't matter what the SNR Margin
is as long as you remain connected... My SpeedStream works
reliably below 6 dB, my SpeedTouch doesn't. Many parameters
may appear to be relative in the DSL world, that's why i prefer
to compare curves these days: i've found better. |
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