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Surprised to see that my Mum's ADSL connection is now connected at the fastest speed it ever has. The attenuation has also dropped from 72db to 69db @300khz.
http://dl.dropbox.com/u/28466011/dmtm20130113_1735.png
I wonder what has been changed.
Edited by deleted (Sun 13-Jan-13 17:54:34)
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Has the modulation changed from ADSL2 to g.dmt?
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No it is still standard ADSL (992.1 Annex A) always has been.
It's with eclipse and they won't let us migrate to ADSL2+ unless we sign up to a new contract at a higher price (even though 21CN wholesale is cheaper to provide).
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Register (or login) on our website and you will not see this ad.
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ADSL2+ won't work at that attenuation.
Has the line gone down for a while, indicating the E-side or D-side pairs have been changed?
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There was a disconnect on the 6th Jan - http://www.thinkbroadband.com/ping/share/e33dc75f036...
Another on the 7th - http://www.thinkbroadband.com/ping/share/82a5265461c...
Both at times I wouldn't expect a BT engineer to be working at the PCP, could have been a change within the exchange but doesn't really look like enough down time.
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There's something very strange about the minimum and average latencies there. It drops almost imperceptibly after the first disconnection but apparently has jumped considerably one minute later - at the start of the 7 th.
Independent of that, has the router been moved at their house?
My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 54.0/14.9Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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Nothing has changed with regards to the set-up of the router, it''s location, the cable or anything else within the property.
Here's a ping graph for a day when no one was home (so no usage causing spikes in ping) - http://www.thinkbroadband.com/ping/share/4a1e4a44c6c... (This was before the higher sync)
I see what you mean about the ping changing at midnight, I had to flick between the two days to notice it.
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I found an old DMT image from when I used to run with a 3~3.5db SNR Margin.
https://dl.dropbox.com/u/28466011/olddmt.png
This was one of the best speeds I'd had before with a 6dB SNR Margin it would normally run at around ~1200kbps, usually just enough to give a 1Mbps line profile.
The biggest difference between now and then is the recent use of some lower tones (frequencies) for the downstream. It also has some higher tones and generally more bits per tone over all.
Have BT changed the frequencies they use slightly?
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Is it in an FTTC enabled area?
Maybe more and more ADSL customers moving over to FTTC is reducing cross-talk from the ADSL lines which still go all the way back to the exchange?
Your Mum has certainly gained a few extra frequencies AND the signal strength of the lower ones has increased, too.
EDIT: There is one very noticeable difference - see the closed gap between upstream & downstream frequencies?
Ade
vDSL2 FTTC Infinity with BT
DL Sync 80Mbps
UL Sync 20Mbps
Edited by adebov (Sun 13-Jan-13 22:28:45)
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No FTTC but there are some people with Fixed Wireless (Vfast) or FTTH (the failed, but still running ICS project) now. So a good number of people might have ditched their ADSL service.
That might have made a difference but I think unlikely.
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Yes, the number of tones has increased, also the minimum SNR has increased.
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The attenuation has also dropped from 72db to 69db @300khz.
Colder weather ?
--
Phil
MaxDSL - goes as fast as it can and doesn't read the line checker first.
MaxDSL diagnostics
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Yes, the number of tones has increased, also the minimum SNR has increased.
Coupled with the apparent higher signal strength and the additional tones getting through (at the top end) because of that, and there you have it...a higher than previous speed.
This is also not the only post on here reporting of unusually high ADSL connection speeds.
Ade
vDSL2 FTTC Infinity with BT
DL Sync 80Mbps
UL Sync 20Mbps
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But it happened before it had got cold (again).
If just down to cold weather then it won't last and as soon as it's warm again the speed will drop. Well I guess I'll find out when it warms up.
* no I didn't just edit my post.
Edited by deleted (Sun 13-Jan-13 23:24:19)
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Paraphrase - To have one typo can be regarded as a misfortune. To have two identical ones looks like carelessness. 
My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 54.0/14.9Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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Paraphrase - To have one typo can be regarded as a misfortune. To have two identical ones looks like carelessness.
Is that a warming to him?
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M H C
taurus excreta cerebrum vincit
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Lack of proof reading while writing a reply in the middle of playing a game on my Xbox in a darkly lit room. Lol.
Look at my face ... do I look like I care.
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Think he is warming to me
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But do either of you know what I am paraphrasing, without looking it up or googling key words in it?
My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 54.0/14.9Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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You win an Important Oscar!
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
Edited by XRaySpeX (Sun 13-Jan-13 23:37:44)
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Shhhh  . I can see you have it.
My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 54.0/14.9Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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