vintagewino
join:2003-07-22
Grimsby, ON
 ·TekSavvy Solutions..
 ·magicjack.com
·Look Communications
| reply to Oinktastic
Re: tweaking
said by Oinktastic  :Lol thanks for the information. I guess I have another veteran to consult now 
Plug your modem into one of these:
»www.canadiantire.ca/AST/browse/3···imer.jsp
6 programmable "outages" with a randomize feature.
They will check the # of outages over the last few days, so just make certain it doesn't go off at exactly the same time several days running!  Just a little too suspicious! |
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dslrocker3
join:2002-05-26
Toronto
4 edits | reply to dslrocker3
Re: Help/Advice with my Line Statistics please
decided to run to some dslreports tests....
»/tweakr/block:···terpppoe
»/linequality/nil/2576933 |
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Oinktastic
join:2005-08-24
Scarborough
·TekSavvy Solutions..
 ·3 Web
| Very little jitter. That's nice to see.
What's with 10% re-transmitted packets though? Is that a problem? |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| I just found this page explaining "Bridge Taps", it's a must read:
»adslm.dohrenburg.net/troubleshoo···taps.php
 |
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Oinktastic
join:2005-08-24
Scarborough
·TekSavvy Solutions..
·3 Web
| NIce find
I wonder how well Bell can test for those gremlins. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Follow the "Tomi Engdahl's site" link, magic word:
"TDR" (Time Domain Reflectometer)
It's amazing what the graphic signatures can be
saying (see at the botomm of that web page!)...
 |
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dslrocker3
join:2002-05-26
Toronto
4 edits | reply to dslrocker3
I've also notice a recent trend over the past few nights when the downstream signal to noise ratio has been consistently lower during the night. During the night, the downstream signal to noise ratio flucuates between 24.5 and 25.0dB. During the day, it rises to 25.5 to 26.0dB. Also, one or more the tone's signal to noise ratios has been dropping to 14/15dB at night.
Today, I'm noticing a lower than normal error rate. The upstream error rate is about 1/2 to 1/4 of what is normally is. What strikes me is the tone gaps that showed up the last time that I reset my modem. Coincdently, there are local Toronto AM radio stations at 1010 and 1050 KHz. I wonder if tones 234, 243, and 244 are noiser on my line that the rest and if the fact thjat the my modem has disabled them for now has resulted in the lower error rate. Unfortunately, I no longer have a modem that is capable of the manual disabling of speicific tones. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Hi DSLRocker,
Two comments come to my mind. 1st, i'm a bit
reluctant to depend on instant snapshots now
that i've discovered the real power of long-term
records when processed through a SpreadSheet
to create daily "noise" curves... 'DMT' captures
are precious at the preliminary stage but can be
misleading when doing serious trouble-shooting.
In the present case the detail which strikes me
is about FirmWare versions. I'm observing very
different behaviours possibly due to differences
in FirmWares... For example, v6.1.0.5 gives me
a sawtooth-shaped SNR Margin curve while i'm
having a relatively flat curve with v7.4.3.2 (but
it may also be a consequence of the phone-line
quality which varies - or a combination of these
factors). In any case, 'DMT' instant snapshots
fail to reveal such differences.
My second comment will be about A.M. stations
being picked up by the DSL wiring. If you think
this is what's happening then RF Choking makes
even more sense to me now!
 |
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dslrocker3
join:2002-05-26
Toronto
| reply to dslrocker3
you are abosolutely correct about standing-still-in-time snapshots. I didn't have anything running to compare stats from one moment to the next. What I can tell you that the average has not altered sigficantly each time I'm checked since I last reset the modem. But that's about all I can tell you about it obviously.
Since I have no real problems with my line, it's hard to get motivation to actually "mess around" with the wiring when there's very little to gain. Any experiments will be pretty much just for knowledge and curiosity.
When it comes to the firmware, I'm reluctant to try newer version for reasons that you are already aware of. I don't see myself doing much tweaking as my line doesn't need it but I also don't want to lose the RCO and attainable rate reporting that I believe is lost in version 7 firmwares. |
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Bicephale
join:2005-09-24 | Yeah, i concur entirely: the 'DMT'-hostile v7
FirmWares are certainly a bugger for curious
DSL customers, there's no doubt about that!
 |
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dslrocker3
join:2002-05-26
Toronto
4 edits | reply to dslrocker3
10/24/2009 23:40EDT, extension cord removed |
I have now unplugged that extension cord. The signal to noise ratio is down by about 3dB and the attainable rate is down by 700 to 900Kbps (approx).
I want to see if that extension cord that helps boost the signal to noise ratio and downstream attainable rates is also a source of noise.
I have DMT 7.35 running in diagnosis mode and plan on leaving that running for at least 24 hours. I am not encountering any problems on my line and this is all just for curiosity. I don't like the way my bits per tone chart looks with that extension cord removed but we'll see what happens when it comes to CRC and FEC line errors. |
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vintagewino
join:2003-07-22
Grimsby, ON
·TekSavvy Solutions..
·magicjack.com
·Look Communications
| reply to Oinktastic
said by Oinktastic : I wonder how well Bell can test for those gremlins.
Agreed, nice find!
Generally, the nasty part would be once the F2 wire that goes to your place is not terminated to your drop, but is allowed to go past your place to ...???
As the picture shows, this can create standing waves (reflections) that would be a miserable pig to try to find, much less try to "tune out".
Seems the easiest way would be to cut the excess that's going past your place so that it no longer exists on your line.
Hmmm ... this gives me an idea!!! |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to dslrocker3
Lets put things side by side for clarity:
Less DS SNR Margin = more DS Power...
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Bicephale
join:2005-09-24 | reply to dslrocker3
I can't wait to see the numbers flow, DSLRocker!!!
 |
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dslrocker3
join:2002-05-26
Toronto
3 edits | reply to dslrocker3
I have completed my little experiment. I have come to the conclusion that the extension cord does not attract any extra noise. I can see no signficant difference in error rates between the extension cord being plugged in and not and that extension cord only appears to help my DSL connection. The DMT screenshot provides a quick snapshot of line conditions after I returned everything to my regular set up.
I know a change in attenuation of 0.5dB doesn't mean a lot but my upstream attenuation has dropped to a slightly lower number. 4.0dB? I must be pretty close to that Ikanos remote! |
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xbell
@cgocable.net
| reply to vintagewino
said by vintagewino :Seems the easiest way would be to cut the excess that's going past your place so that it no longer exists on your line. It's called cutting ahead and Bell frowns on it for the techs. I have been known to do it though. |
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Bicephale
join:2005-09-24 | reply to dslrocker3
I'd say you're so close it renders the antenna effect unsignificant!
 |
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Oinktastic
join:2005-08-24
Scarborough
·TekSavvy Solutions..
·3 Web
| reply to xbell
said by xbell :
It's called cutting ahead and Bell frowns on it for the techs...
That's a shame that they discourage it, since it would keep a lot of their customers happier with their connections. My line could definitely use some TLC, but Bell's so far refusing to even admit there's a problem.
My family has been using Bell home phone for decades and we will probably continue to do so as long as the price doesn't go up. After all, we're using only the basic service with no features and it's not even really worth what we're currently paying. It's been very stable and of decent quality for the entire time we've had it, so we're happy to keep using it for consistency and loyalty's sake.
However, their increasing unwillingness to help customers, coupled with their constantly rising prices for less and less value are forcing people to go all digital and ditch all their Bhell products. If they continue to ruin my DSL experience, I may have to follow the pack and migrate elsewhere. |
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Bicephale
join:2005-09-24 | If they could just stay away from electrical power conduits!...
 |
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dslrocker3
join:2002-05-26
Toronto
4 edits | reply to dslrocker3
Bell brown cabinet box |
just a wiring question for my line...
I know that the absolute best way is to usually have the modem's wiring going to the Bell side of the NID and then a filter on the customer side but as I've said before, that doesn't provide the best connection in my case due to a probable impendence mismatch. I have the wire that comes inside going to a junction in a basement and my modem is connected through wiring that is connected to that same junction point. From that junction point I have a wire going to a double RJ11 jack that has a filter plugged into one of those jacks with a line cord going to a second junction point to feed the rest of the house/the voice line.
Is it better to leave it like that or is better that the wire coming into the house is connected to that double jack and have one side of that double jack feed the junction that the modem wiring is hooked up to and the other side feed the second junction for the voice? |
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