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Standard User Alnath
(fountain of knowledge) Tue 01-Apr-14 16:19:38
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Re: Line Fault


[re: RobertoS] [link to this post]
 
yeah but i am not sure a week is very good is it.
Standard User Alnath
(fountain of knowledge) Tue 01-Apr-14 16:21:48
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Re: Line Fault


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
The IP Profile used and reported appear to be at different points in the BTW system. Your actual speed looks correct for the IP Profile of 64.84Mbps you should have, so I expect that will self-correct soon.


Id like my 75/18 back soon please lol http://www.thinkbroadband.com/speedtest/button/13963...
Standard User RobertoS
(sensei) Tue 01-Apr-14 16:27:51
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Re: Line Fault


[re: Alnath] [link to this post]
 
You low upstream looks odd, as though it is a hangover from banding.

Your 67,000kbps could be banding, but more likely I think to be because interleaving has been applied. If the latter, that too will self-correct after a while. It's a suspiciously round number however.

My broadband basic info/help site - www.robertos.me.uk | Domains,site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 59.4/14.4Mbps @ 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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Standard User Alnath
(fountain of knowledge) Tue 01-Apr-14 17:37:29
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Re: Line Fault


[re: RobertoS] [link to this post]
 
When the fault was on the noise margin was at 6db for near enough 6Mbit up and 50Mbit down, at the time the IP profiles were at there maximum. Now the faults been fixed the noise margins have recovered but the speeds haven't so i am guessing thats why the upstream is like it is, the speed you see is what it was for a 6db noise margin.

Ill give it a week and see what happens.
Standard User deleted
(deleted) Wed 02-Apr-14 18:41:25
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Re: Line Fault


[re: Alnath] [link to this post]
 
The way it looks to me is that DLM had intervened, and put you on a banded profile. It may, or may not, come with interleaving and FEC turned on - I suspect we could only tell if you could see the error counts (FEC, CRC and maybe ES values)

At the time of the fault, your line reached the target 6dB SNR with a speed of 50Mbps, which was less than the top-speed of the band.

When the fault was fixed, your speed jumped to the top end of the band, for downstream at least. There is still plenty of room to go higher, as seen in the max attainable. The presence of FEC+Interleaving shouldn't matter, as you have plenty of headroom to cope with those, and still get a full 80Mbps.

So where does that get us...

Ordinarily, DLM will reduce its intervention in 3 to 4 weeks, by either reducing or removing the FEC+Interleaving setting.

However, I don't think we've seen evidence that the banding gets removed quite so easily. The whole point of banding is to cope with errors that come and go... so it might take longer for DLM to decide that it really has gone.

If you don't mind being a guinea pig, it'd certainly be interesting to see what happens to your line. However, if you want it back to normal sooner rather than later, you might need to contact your broadband supplier, and ask for an Openreach appointment for a DLM reset.

If you point out that a physical line fault has been fixed, they ought to be able to organise this without requiring you to be present.

(I agree with RobertoS that your upstream isn't quite what I'd expect with banding, so my analysis might be off a little)
Standard User Alnath
(fountain of knowledge) Wed 02-Apr-14 20:35:29
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Re: Line Fault


[re: deleted] [link to this post]
 
Just for the record then today its saying

6. Data rate: 7198 / 67000
7. Maximum data rate: 32233 / 110249
8. Noise margin: 24.9 / 18.2
9. Line attenuation: 0.0 / 5.7
10. Signal attenuation: 0.0 / 5.7

Download speed achieved during the test was - 61.84 Mbps
For your connection, the acceptable range of speedsis 40 Mbps-64.85 Mbps .
Additional Information:
IP Profile for your line is - 64.85 Mbps

Upload speed achieved during the test was - 6.25Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps

This is what i used to get all the time http://www.speedtest.net/result/3247930106.png
Standard User Alnath
(fountain of knowledge) Fri 04-Apr-14 10:36:10
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Re: Line Fault


[re: Alnath] [link to this post]
 
HH5 rebooted over night

6. Data rate: 16994 / 79995
7. Maximum data rate: 33154 / 110102
8. Noise margin: 16.3 / 14.3
9. Line attenuation: 0.0 / 5.7

Download speedachieved during the test was - 75.05 Mbps
For your connection, the acceptable range of speeds is 40 Mbps-64.85 Mbps .
Additional Information:
IP Profile for your line is - 64.85 Mbps

Upload speed achieved during the test was - 10.88Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps

http://www.speedtest.net/result/3417012135.png

this seems a bit squiffy though http://www.thinkbroadband.com/speedtest/button/13966...

Apart from the upload being a couple of Mbit down that all happened a lot, lot quicker than i expected.
Standard User deleted
(deleted) Sat 05-Apr-14 12:23:30
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Re: Line Fault


[re: Alnath] [link to this post]
 
That was a pretty fast response from DLM - I'm surprised too.

Interesting to see that the IP Profile value is wrong, yet your speedtests can still work at above that value. And a strange result from the TBB tester too.

I wonder how long it will take for the upstream to jump the next step?
Standard User Alnath
(fountain of knowledge) Sun 06-Apr-14 12:06:16
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Re: Line Fault


[re: deleted] [link to this post]
 
It did another reboot in the night and my speeds are now fully recovered.

5. VDSL uptime: 0 days, 07:15:10
6. Data rate: 20000 / 79995
7. Maximum data rate: 33476 / 109333
8. Noise margin: 15.4 / 14.2
9. Line attenuation: 0.0 / 5.7

http://www.speedtest.net/result/3421268947.png

http://www.thinkbroadband.com/speedtest/button/13967...

Download speedachieved during the test was - 75.05 Mbps
For your connection, the acceptable range of speedsis 40 Mbps-77.43 Mbps .
Additional Information:
IP Profile for your line is - 77.43 Mbps


Upload speed achieved during the test was - 13.74Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps
Standard User RobertoS
(sensei) Sun 06-Apr-14 12:26:10
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Re: Line Fault


[re: Alnath] [link to this post]
 
smile

My broadband basic info/help site - www.robertos.me.uk | Domains,site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 59.4/14.4Mbps @ 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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