BobTheVeg
join:2004-09-05
Montreal, QC | reply to Bicephale
Re: Need help/tips about DSL connection speed
The OV303R2 can operate in both MoDem/Router and Bridge mode simultaniously. |
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Bicephale
join:2005-09-24
 ·TekSavvy Solutions..
| Hi,
I don't use a router so it's not possible for me
to make a statement with certainty but a Windows
'Miniport WAN' session using my GNet BB0060B or
my GNet GBB2060-Xi appears to indicate that they
switch modes automatically just like my ST546v6.
You probably mean that your OvisLink OV303R2 has
it's management servers available no matter what
mode you put it into but i could be mistaking...
Would this make any sense? You tell me! |
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BobTheVeg
join:2004-09-05
Montreal, QC
3 edits | Yes exactly.
The networking gets confusing as the PPPoE dial can be on the same network as the LAN. In other word the modem, the router WAN&LAN and other PCs can all be on the same switch. and it allow you to get access to the internet via the router and still have access to the web interface of the modem. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Hummm...
Marvelous! So, you don't have to make trade-offs
between having INet connectivity and statistics.
Just great. Now that i got the good news i'm only
more curious than i was before. Your course of
action has changed slightly since AEI decided to
provide a brand new DSL device for you to try. My
question is, how does it compare? Is it worth the
expen$e? ...and hence, can we see the figures?... |
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BobTheVeg
join:2004-09-05
Montreal, QC
| I have not been re-synchronized yet. Of course I plan to compare this new modem against my old one. If I ain't getting any meaningful progress, this new modem ain't solving the real problem.
Toward my course of action, they kinda pushed me in a hurry to buy this modem in order to prevent sending someone to my home which would cost me 100+$ if the problem was the modem. To be honest, I don't mind paying for another modem after 5 years.
I also tried all version of DMT and none works with the OV303R2  . There is a several configuration page in the web interface which has similar features. Like choosing each bins 1 by 1 (255 check box).
The inner web page content is HIGHLY similar to : »www.support.dlink.com/emulators/···lcfg.htm
Only the skin is different. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
1 edit | Oh wow!
Spectral Shaping done like this is going to be a lot easier:
3Com USR-910x, D-Link DSL2320B, etc. - Tone-per-Tone GUI setup!
I'm dribbling with apprehension, i can't wait for your next post!
 |
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BobTheVeg
join:2004-09-05
Montreal, QC
2 edits | 
Best I've got so far |
I am still not re-synchronized but I took off some upstream tones (0 to 4 obviously used by the regular telephone) and I received an instant boost in the downstream SNRM (21 to 23). The "Attainable Rate (Kbps)" also increased above 7000 Kbps. This confirms your post of "Spectral Shaping".
I tried other tone removal at the edge or randomly inside but no meaningful difference. I currently have no way to see which tone has the best SNRM value.
I tested for fun the impact of placing my speaker on the wire of the phone line alone the wire of the speaker and saw an instant drop in the SNRM value ( drop of 0.6 db ). Removing the speaker re-increased the SNRM value back to what it was.
Knowing this, I started trying other phone location and I achieved the following result in the screen shot.
Edit: the software seems almost identical to BEETEL 220BX ADSL2+ MODEM »www.techenclave.com/guides-and-t···916.html |
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nanook
Premium,MVM
join:2007-12-02
·Bell Sympatico
·TekSavvy Solutions..
| said by BobTheVeg  :I was wondering if having the 4 wires on the telephone cable is important for the DSL modem. I am 95% sure that my current installation only has 2. You only need 2 wires (1 pair) for DSL. Most home phone wiring has 4 wires, 2 twisted pairs, in order to support 2 phone lines.
The "Attainable Rate (Kbps)" also increased above 7000 Kbps. Based on the stats that I have highlighted it looks like Bell has put you on a 3Mb/s profile. Your SNR and Attenuation both look fine. They should support at least a 5Mb/s profile. The Attainable Rate of 7.5Mb/s also confirms this.
Call aei on Monday, ask them to look at your line stats again and ask them to get Bell to increase your profile. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to BobTheVeg
Spectral Shaping |
No black wire is going anywhere in the thread you
refer to: the last time i saw one of those doing
something, i were twenty years younger and my aunt
was making me take a look at a 'Princess' phone.
While reading "A wire is a wire is a wire", you'd
notice a flat two-conductors cable, this cable is
unusually sturdy and comes directly from the pole
located on the other side of the street. No other
wire than this pair is provided by Bell, a third
one has their label on it but it just connects to
the house's ground, actually. One photograph is
showing how the black wire wraps around the ends:
%20&%20Home%20Lines%20.JPG)
As you can see, i have no use of the black wire,
this photograph also shows Bell's main on the left.
The tones ("bins" on a GNet unit) which i believe
to be of most interest are those around the middle
ends: below 31 for the UpStream upper edge and
above 32 for the DownStream lower edge. I advise
you to make tests with as much room between those
two edges as possible. Tones going from 0 to 5
are not used as this is the voice band and bin 31
is supposed to be reserved for a marker. You can
play with the rest but Bell still hasn't upgraded
your profile just yet and the most important item
you need to know right now is the RCO numbers if
you intend to measure your progress! In fact, be
prepared to ask AEI to read the RCOs from Bell's
Line Test portal a few more times because i don't
see how you're going to determine the sweet spot
otherwise: allow me to remind you that on this
piece of HardWare you've got no Spectral Response
curve, no 24 h CRC Error rate curves and no RCO
figures... SNR Margins can be helpful but i've
shown that this sort of data can be misleading...
Relatively to RFI control, speaker magnets ain't
suitable for this task, i'm afraid. If you have
a very old A.M. radio which you can detroy then
there's a ferrite rod inside. A rod is't quite
as efficient as a toroid core but it might give
you a hint as to wether or not it's worth trying
to find ferrite toroidal cores for future tests.
Beware, ferrite rods are made of compressed powder
so these little gremlins must be handled cautiously! |
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Bicephale
join:2005-09-24 | reply to nanook
Hi Nanook,
According to this, i'd say he's on a 2496/640 Kbps
Interleaved maintenance profile but i can be wrong... |
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nanook
Premium,MVM
join:2007-12-02
·Bell Sympatico
·TekSavvy Solutions..
| said by Bicephale :According to this, i'd say he's on a 2496/640 Kbps Interleaved maintenance profile You are right.
In my haste to reply I forgot that the 2496 reported by the modem is not his actual speed but rather the profile setting.
In any case, his line can go a lot faster. |
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Bicephale
join:2005-09-24 | Of course it can go faster, this is why i find it so puzzling:
i've got worst atenutation than he actually does, after all... |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
3 edits | reply to BobTheVeg
Hi again,
Nanook has a very good point here: call AEI to get
your profile upgrade if you haven't done so! I must
confess i'm not the best teacher around, it's easy
for me to overlook the fact that maybe you didn't
because that's the very 1st thing i'd do, naturally:
you can only use Spectral Shaping to optimize a few
parameters within the limits previously negociated
between your DSL unit and its peer DSLAM (e.g., you
cannot set the speed higher than what the profile is
set to and in your case it's 2496/640 Interleaved).
5056/800 Kbps FastPath would be nice for starters,
Spectral Shaping should allow you to find optimized
UpStream/DownStream speeds to suggest to AEI later.
Being on FastPath instead of Interleaved mode should
let you decide if the noise level is too high for you;
there again, Spectral Shaping will probably make it
possible for you to find a stable trade-off between
speeds and RCOs/CRC Error rates, etc. |
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BobTheVeg
join:2004-09-05
Montreal, QC
| reply to nanook
said by nanook :Call aei on Monday, ask them to look at your line stats again and ask them to get Bell to increase your profile. I called them Friday and still waiting. I received the 2496/640 profile because it is what my old modem could handle without getting disconnected.
I managed to decrease the Output Power (dBm) by 0.1 for both up/down stream. I am almost connected at the demarcation box now. |
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Bicephale
join:2005-09-24 | Oups! I wasn't sure about the call to AEI... |
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Bicephale
join:2005-09-24 | reply to BobTheVeg
Euh... Your old untweaked MoDem, that is. |
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Bicephale
join:2005-09-24 | reply to BobTheVeg
Is this a house where there could be hidden taps inside the wall? |
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BobTheVeg
join:2004-09-05
Montreal, QC
| said by Bicephale :Is this a house where there could be hidden taps inside the wall? The house is not old enough for that. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Hi,
I would have liked it much better if you could
have identified a faulty wiring section. Well, with
centralized filtering implemented right at the
demarcation point, there's nothing more to be
done unless you have many power lines around.
Additionally, i'm having a second thought about
using some refurbished A.M. ferrite rod: it were
used as an antenna and certainly doesn't behave
like a toroidal core at all... Maybe it can work as
a "loading coil", i wonder, but i wouldn't bet too
much on it. I guess it will be necessary to wait
until you get something new to report on monday!
I don't forget that you were on a 3488/768 Kbps
Interleaved profile before this thread started.
If you have time, a few OvisLink captures would
be great, though! You know, the tweaker type...
 |
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BobTheVeg
join:2004-09-05
Montreal, QC
1 edit | said by Bicephale :I don't forget that you were on a 3488/768 Kbps Interleaved profile before this thread started. I remember being on a 3008/800 Fast when I first joined aei and stayed on the profile for a long time. I never looked back at those value ( because I use a router ) until I had problem with the connection. And I believe it is a recent change as the line quality test ping has increased by 30ms because of the interleave. |
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