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Anonymous
(Unregistered)Mon 11-Apr-11 15:30:52
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FTTC, line profiles & throughput


[link to this post]
 
Have shiny new FTTC broadband, sync at 39879/10000kbps, BT line profile 38717/10000kbps but seeing about 4.2MBps throughput (smidge under 35Mbps).

Querying this my ISP says "BT do not allow more than 35Mb through the line on FTTC so this is why it's 35Mb max."

Now the ISP seem certain of this and they're certainly regarded as one of the more technically competent ISPs but I hadn't come across this elsewhere.

Has anyone else?
Standard User RobertoS
(sensei) Mon 11-Apr-11 15:43:30
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Re: FTTC, line profiles & throughput


[re: Anonymous] [link to this post]
 
That's garbage.

The IP profile would be 35Mbps for that to be the case.

Which ISP?

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Yerman164
(learned) Mon 11-Apr-11 15:43:54
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Re: FTTC, line profiles & throughput


[re: Anonymous] [link to this post]
 
Doesn't sound right to me, I'm on Infinity and get a throughput of around 37.

http://www.mybroadbandspeed.co.uk/results/88756181.png

Newsgroups run at 4.4-4.6MB/s


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Standard User paul1360
(member) Mon 11-Apr-11 15:47:37
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Re: FTTC, line profiles & throughput


[re: Anonymous] [link to this post]
 
As already be said i get more than 35Mb

[IMG]http://www.speedtest.net/result/1246849033.png[/IMG]
Standard User mr_bean
(learned) Mon 11-Apr-11 15:50:20
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Re: FTTC, line profiles & throughput


[re: RobertoS] [link to this post]
 
That's garbage.

The IP profile would be 35Mbps for that to be the case.

Yes, that's what I thought (both points).

Which ISP?

AAISP.

What is certainly true is that their traffic shaping is limiting the line to 35Mbps - the logs clearly show the sync rate as 39879000 (and the BT speedtest confirms the BT IP profile as 38717) but the next line in the log says "linerate=35000000"
Standard User RobertoS
(sensei) Mon 11-Apr-11 16:06:46
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
Are you the OP, but had forgotten to sign in at the time?

Are you also saying that AAISP can see the sync speed?

Re speedtest.net results from others, they can't be trusted at the level of accuracy required here. I would only trust the BT speed test.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User mr_bean
(learned) Mon 11-Apr-11 17:02:25
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Re: FTTC, line profiles & throughput


[re: RobertoS] [link to this post]
 
Are you the OP, but had forgotten to sign in at the time?.

Yes.

Are you also saying that AAISP can see the sync speed?.

Yes, it's in the logs that AAISP make visible in their customer log-in pages.

eg if I look at my sync history I get
6 Apr 09:16:31 39712K adsl35000-b 35000K

Slightly inconsistently elsewhere in the logs what I take to be the sync speed is reported as 39879000. The OR engineer said 39995 on the line tester. The BT speedtester has always reported the IP profile as 38717 so whatever the exact figure it's good enough for the highest IP profile. The 35Mbps "BRAS" rate that AAISP are setting is also clearly in the logs and information presented as well.

Re speedtest.net results from others, they can't be trusted at the level of accuracy required here. I would only trust the BT speed test.

The speedtest itself consistently shows just under 30Mbps but I get sustained throughput of about 4.2MB/s on real world transfers.
Administrator MrSaffron
(staff) Mon 11-Apr-11 17:12:07
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
"The BT speedtester has always reported the IP profile as 38717"

You have verified it is still saying 38717 on the BT Speedtester?

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User mr_bean
(learned) Mon 11-Apr-11 17:17:47
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Re: FTTC, line profiles & throughput


[re: MrSaffron] [link to this post]
 
You have verified it is still saying 38717 on the BT Speedtester?


Several times. Last was last night - am at work now so can't check but only one sync event (on wednesday, when the line was installed) showing on the AAISP sync history. Several PPP restarts though as I've been tweaking the firewall set-up and making sure that it was correctly restored across a reboot or router power cycle and the AAISP log always shows "linerate=39879/10000" for those.
Administrator MrSaffron
(staff) Mon 11-Apr-11 17:21:04
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
So perhaps the question should be, why does the IP profile on AA systems not match that on the BT system?

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User mr_bean
(learned) Mon 11-Apr-11 17:59:13
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Re: FTTC, line profiles & throughput


[re: MrSaffron] [link to this post]
 
So perhaps the question should be, why does the IP profile on AA systems not match that on the BT system?

Indeed.

In fact I have asked them this very thing and obtained the response that I posted at the start of this thread "BT do not allow more than 35Mb through the line on FTTC so this is why it's 35Mb max."
Moderator billford
(moderator) Mon 11-Apr-11 18:08:48
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
In reply to a post by mr_bean:
"BT do not allow more than 35Mb through the line on FTTC so this is why it's 35Mb max."
Hmm.

My Broadband Speed Test

~~~~~~~~~~~~
Bill

[email protected] ________________________Planes and Cars and ...________________________BQM
The author of the above post is a thinkbroadband moderator but it does not constitute an official statement on behalf of thinkbroadband.
Standard User mr_bean
(learned) Mon 11-Apr-11 18:16:02
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Re: FTTC, line profiles & throughput


[re: billford] [link to this post]
 
35.3 is possibly a bit close to the margin of error to really "prove" the point to AAISP but thanks for the datum.

What I could do with is a few people with clear BT speedtest results in the 37-38Mbps range to provide as evidence.

Edit: think I might pop over to the AAISP forum to see what other people's experience is.

Edited by mr_bean (Mon 11-Apr-11 18:18:52)

Moderator billford
(moderator) Mon 11-Apr-11 18:23:10
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
Fair point, but don't forget the "Mbps" on the result should really be "Mibps", ie it's 220 not 106.

If you click on it you'll see the Kbps speed, which is how it's usually quoted- 36155.38 Kbps

~~~~~~~~~~~~
Bill

[email protected]om ________________________Planes and Cars and ...________________________BQM
The author of the above post is a thinkbroadband moderator but it does not constitute an official statement on behalf of thinkbroadband.
Standard User griff_90
(fountain of knowledge) Mon 11-Apr-11 18:45:18
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Some speedtest results for your use


[re: mr_bean] [link to this post]
 
In reply to a post by mr_bean:
What I could do with is a few people with clear BT speedtest results in the 37-38Mbps range to provide as evidence.


I can't run another BT speedtest for an hour but I'll post again once I've done it.

For now though here's some various results you can use and/or show to AAISP.

Speedtest.net - http://speedtest.net/result/1246708155.png

Mybroadband speedtest - http://www.mybroadbandspeed.co.uk/results/88968111.png

Thinkbroadband Flash - http://img.photobucket.com/albums/v427/griff_90/b4c6...

Edited by griff_90 (Mon 11-Apr-11 19:47:57)

Standard User mr_bean
(learned) Mon 11-Apr-11 20:07:42
Print Post

Re: Some speedtest results for your use


[re: griff_90] [link to this post]
 
I can't run another BT speedtest for an hour but I'll post again once I've done it.


Thanks
Standard User mr_bean
(learned) Mon 11-Apr-11 20:25:37
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Re: FTTC, line profiles & throughput


[re: MrSaffron] [link to this post]
 
Interestingly this came up in a discussion in 2009. It doesn't look as though anybody got to the bottom of it back then either.
Standard User yarwell
(sensei) Mon 11-Apr-11 20:49:00
Print Post

Re: FTTC, line profiles & throughput


[re: billford] [link to this post]
 
Good point, as Openreach work in powers of 10 for FTTC....

"These rates use 40,000,000 bits/s as 40Mbit/s, and are the VDSL line rates"

The SIN sayeth.....

"In general, Openreach suggests that CPs should set the EU traffic rate to allow for part of the VDSL rate to be used for internal FTTC use depending on the CP frame size. At 1532 byte frame size 40Mbit/s VDSL will support 39.282Mbit/s Ethernet
throughput."

Not sure if we then need to multiply that by 1460/1500 to correct for TCP/IP headers giving a data throughput of 38.23 Mbits/s. Still doesn't get us down to 35 !

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Are your kids pirates ? Limewire, Bearshare, Kazaa, BitTorrent, eMule are all tools of the trade.
Standard User RobertoS
(sensei) Mon 11-Apr-11 21:59:54
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
If AAISP are mistakenly limiting it, as may be the case from that 2009 link, (which contains incorrect info about the overheads by the way, see yarwells post here), then they will all be the maximum.

10/03/11 17:57 Thu 35363 Kbps 8316 Kbps
05/03/11 23:17 Sat 35939 Kbps 8313 Kbps
05/03/11 23:15 Sat 36477 Kbps 8299 Kbps
04/03/11 15:56 Fri 35263 Kbps 8306 Kbps

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User reme8488
(eat-sleep-adslguide) Wed 13-Apr-11 07:52:02
Print Post

Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
http://speedtest.net/result/1249661845.png

Have a look at the other test results that I have run as nearly all are in the 37's for downstream side of things.

Recent results from My Broadband Speed test site:

Date Download Speed Upload Speed
Today 06:47 37448 kbps (4.68MB/s) 8367 kbps (1.05MB/s)
Yesterday 06:45 37601 kbps (4.7MB/s) 8343 kbps (1.04MB/s)
Monday 06:40 37485 kbps (4.69MB/s) 8208 kbps (1.03MB/s)
Sunday 08:07 37475 kbps (4.68MB/s) 8363 kbps (1.05MB/s)
Saturday 07:22 37462 kbps (4.68MB/s) 8377 kbps (1.05MB/s)
Friday 06:28 37462 kbps (4.68MB/s) 8374 kbps (1.05MB/s)
Apr 7, 07:36 37477 kbps (4.68MB/s) 7921 kbps (990kB/s)
Apr 7, 07:36 37366 kbps (4.67MB/s) 8338 kbps (1.04MB/s)
Apr 6, 06:51 37483 kbps (4.69MB/s) 8359 kbps (1.04MB/s)
Apr 5, 20:49 37120 kbps (4.64MB/s) 8340 kbps (1.04MB/s)
Apr 5, 07:46 37464 kbps (4.68MB/s) 8363 kbps (1.05MB/s)
Apr 4, 06:45 37471 kbps (4.68MB/s) 8335 kbps (1.04MB/s)
Apr 3, 23:43 37449 kbps (4.68MB/s) 8340 kbps (1.04MB/s)
Apr 3, 09:39 37491 kbps (4.69MB/s) 8368 kbps (1.05MB/s)
Apr 3, 09:37 37461 kbps (4.68MB/s) 7836 kbps (980kB/s)
Apr 2, 08:01 37489 kbps (4.69MB/s) 8373 kbps (1.05MB/s)
Apr 1, 21:04 37497 kbps (4.69MB/s) 8362 kbps (1.05MB/s)
Apr 1, 06:54 37469 kbps (4.68MB/s) 8311 kbps (1.04MB/s)
Mar 31, 06:46 37484 kbps (4.69MB/s) 8356 kbps (1.04MB/s)
Mar 30, 20:27 37447 kbps (4.68MB/s) 8331 kbps (1.04MB/s)
Mar 30, 16:00 37460 kbps (4.68MB/s) 8365 kbps (1.05MB/s)
Mar 30, 06:50 37458 kbps (4.68MB/s) 8364 kbps (1.05MB/s)
Mar 30, 06:43 37155 kbps (4.64MB/s) 8329 kbps (1.04MB/s)
Mar 30, 00:01 35916 kbps (4.49MB/s) 8365 kbps (1.05MB/s)
Mar 30, 00:00 30098 kbps (3.76MB/s) 8357 kbps (1.04MB/s)
Mar 29, 17:10 37391 kbps (4.67MB/s) 8363 kbps (1.05MB/s)
Mar 27, 23:09 37299 kbps (4.66MB/s) 8350 kbps (1.04MB/s)
Mar 27, 08:11 37478 kbps (4.68MB/s) 8344 kbps (1.04MB/s)
Mar 26, 19:06 37458 kbps (4.68MB/s) 8374 kbps (1.05MB/s)
Mar 26, 07:55 37469 kbps (4.68MB/s) 8358 kbps (1.04MB/s)

-----------------------------------------------------------------

Regards...
Tom



My Photo Galleries

Line 1: Sky LLU @ 6.5mbit/1mbit
Line 2: BT Infinity @ 38.7mbit/10mbit (line length to FTTC cab 547m exactly)

http://www.speedtest.net/result/1190768709.png
Standard User MHC
(legend) Wed 13-Apr-11 11:02:44
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Re: FTTC, line profiles & throughput


[re: mr_bean] [link to this post]
 
I too get 365xx almost every time except for a few days early on when it was up at 375xx (possibly a change in the noise environment). That shows as 35.7 Mbps

Have just run a flash based test which gives 36.29Mbps (37200 kbps)

Image





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit

Edited by MHC (Wed 13-Apr-11 11:12:54)

Standard User griff_90
(fountain of knowledge) Wed 13-Apr-11 14:35:20
Print Post

Re: Some speedtest results for your use


[re: mr_bean] [link to this post]
 
This is about the best I can provide you with -

http://img.photobucket.com/albums/v427/griff_90/2909...

Unfortunately on every test there's a dip in throughput which brings down the end speed.
Standard User mr_bean
(learned) Wed 13-Apr-11 20:56:18
Print Post

Re: Some speedtest results for your use


[re: griff_90] [link to this post]
 
A&A have settled on blaming BT for passing a duff BRAS profile and have manually upped their shaping to 38M, I can now get a steady 4.5-4.6MiB/s on downloads. The TBB speed-tester says 35.8M but if that's based on 1M=2^20 rather than 1M=10^6 then it works out as 37.5Mb/s and speedtest.net says 37.2-37.5M.

The BT speed tester is consistently lower than the figures above at about 34000kb/s but it was 30000kb/s previously.

So I'm pretty happy with the outcome thanks to an ISP with decent technical support!
Standard User WWWombat
(member) Thu 14-Apr-11 13:39:54
Print Post

Re: Some speedtest results for your use


[re: mr_bean] [link to this post]
 
In the telco world, transmission speeds use the "1M = 10^6" factor, not the binary-based one.

That's no guarantee that the testers have followed the same principle, though...
Standard User RobertoS
(sensei) Thu 14-Apr-11 16:03:55
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Re: Some speedtest results for your use


[re: WWWombat] [link to this post]
 
tbb Main Site Java speed test is 2^20. IIRC so is the Flash-based one.

tbbMeter is 10^6.

Everything gets messy when people start talking about the speed of file downloads, as those (as you know) are 2^20 and most reporting is in KB/s.

Now if we have metric seconds ....

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User WWWombat
(member) Thu 14-Apr-11 18:20:12
Print Post

Re: Some speedtest results for your use


[re: RobertoS] [link to this post]
 
Ugh - that's a problem. I didn't realise there were any testers who did use 2^20 counts; I just assumed that I couldn't assume.

Doesn't it all feel just a bit too much hit-and-miss? The amount of time you have to explain why a line's speed is not what you'll ever see... 5% invisibly lost on FEC, 10% lost by ATM overhead (well, on ADSL), up to 11% can be lost because of the IPProfile thresholds, and another 1% on AAL5/PPP/IP/TCP headers. Add in another 5% variability for the 10^6 vs 2^20 counts.

So many people who think they are missing out on something... but can't really tell.
Standard User Arceon
(newbie) Wed 24-Aug-11 12:24:42
Print Post

Re: Some speedtest results for your use


[re: WWWombat] [link to this post]
 
I Know this is an old thread, so apologies in advance, but I'm having the same issues with my (just installed) A&A FTTC.

What's interesting about it though (that nobody else posted they had) is that in the order log I have this line:

19 Aug 13:17:10 BRAS 35M/9995K, Not Valid for FTTC, 2011-08-19 12: -BT-

Which would seem to indicate the BRAS giving out an incorrect limit? Just wondering if its worth bothering A&A's Techs about, or if there's someway to force a BRAS profile update?



Andrews & Arnold - FTTC Premium - Billion 7800N
Standard User RobertoS
(sensei) Wed 24-Aug-11 12:43:52
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
What does the BT speed tester say? Please post as far down as the end of the upstream figures.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Arceon
(newbie) Wed 24-Aug-11 12:51:42
Print Post

Re: Some speedtest results for your use


[re: RobertoS] [link to this post]
 
Download speed achieved during the test was - 31730 Kbps
For your connection, the acceptable range of speeds is 12000-38717 Kbps .
Additional Information:
IP Profile for your line is -38717 Kbps

Upload speed achieved during the test was - 7388 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 10000 Kbps



Andrews & Arnold - FTTC Premium - Billion 7800N
Standard User colesy10
(regular) Wed 24-Aug-11 14:20:09
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
If you access Clueless, what does it tell you your BRAS rate is there? (usually on the 1st graph next to your telephone number).
If it states 35M then it has been capped, but give A&A a call and the will manually set it.

Edited by colesy10 (Wed 24-Aug-11 14:23:39)

Standard User RobertoS
(sensei) Wed 24-Aug-11 14:41:26
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
The BRAS is correct, 38717 is the highest profile. So it is purely the internal AAISP cap you need to get sorted. Loads of people get a lot more than 35Mbps actual download.

Just one thing - for this purpose, before making a lot of noise make sure you have tried wired to the router, not wireless, and that the speed is still low. The upload isn't brilliant either. Should be 8000+, so make sure it isn't your end.

But that 35 looks suspicious.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Arceon
(newbie) Wed 24-Aug-11 15:44:02
Print Post

Re: Some speedtest results for your use


[re: colesy10] [link to this post]
 
In reply to a post by colesy10:
If you access Clueless, what does it tell you your BRAS rate is there? (usually on the 1st graph next to your telephone number).
If it states 35M then it has been capped, but give A&A a call and the will manually set it.


Yea it's 35.0M. It's currently pending a change (turning interleaving off) but as soon as that's done I'll get onto them about it, cheers.

In reply to a post by RobertoS:
Just one thing - for this purpose, before making a lot of noise make sure you have tried wired to the router, not wireless, and that the speed is still low. The upload isn't brilliant either. Should be 8000+, so make sure it isn't your end.


The test was done from my server which is wired in, so that shouldn't be an issue, but you're right that upload does seem low, i'll ask about that too.



Andrews & Arnold - FTTC Premium - Billion 7800N
Standard User colesy10
(regular) Wed 24-Aug-11 15:52:11
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
Mine was capped at 32M by clueless following my migration, but A&A staff quickly adjusted that, and speeds increased immediately.
Did you request interleaving to be turned off via clueless or did you ask staff to do it? Only asking as I don't think the automated system works on FTTC, but would be interested to know how you get on.
Standard User Arceon
(newbie) Wed 24-Aug-11 15:55:34
Print Post

Re: Some speedtest results for your use


[re: colesy10] [link to this post]
 
Ah. I did it via Clueless, how long should it normally take? Requested it at around 15:00 yesterday but it's not gone through yet.



Andrews & Arnold - FTTC Premium - Billion 7800N
Standard User colesy10
(regular) Wed 24-Aug-11 16:06:30
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
Not sure as I don't believe it will work on the FTTC, so may be permanently ongoing. The best bet would be to give them a ring, and I know it's not easy for them to get interleaving turned off on FTTC though.
Again I would be interested on how you get on with it.
Standard User Arceon
(newbie) Wed 24-Aug-11 16:55:39
Print Post

Re: Some speedtest results for your use


[re: colesy10] [link to this post]
 
Just spoke to support and you're right, it's not possible to turn off interleaving on FTTC at customer request, only via a fault being raised with OR. However the change should go through on Clueless, it will just have no effect.

As for the BRAS profile of 35.0M, it is a valid profile, and the "Not Valid for FTTC" error message I had was direct from BTs system (their system being in error).

As for the speeds being slow, I should probably run a few more speedtests throughout the day im guessing, as the speeds seems to fluctuate (I get 37.2 Down and 8.20 Up on Speedtest.net). Is there a training period with FTTC?



Andrews & Arnold - FTTC Premium - Billion 7800N
Standard User WWWombat
(committed) Wed 24-Aug-11 18:32:04
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
In reply to a post by Arceon:
as the speeds seems to fluctuate (I get 37.2 Down and 8.20 Up on Speedtest.net).


That is pretty close to the top end speeds that you'll see reported for a 40/10 connection (with 38717/10000 profile)

In reply to a post by Arceon:
Is there a training period with FTTC?

Yes. My line synced at 40/2 (with 38717/2000 profile) at first, but with 4% packet loss. After 48 hours, this changed by adding interleaving, and dropping the profiles to 34800/2000 (presumably by lowering the sync speed), which killed off the packet loss.

A day later, I was regraded to a 10Mb uplink: The line reverted to a 40/10 sync (with 38717/10000) profile, and back came the packet loss. Again, after 48 hours, interleaving came back on, and sync speeds reduced.

So a 48 hour training period looks to be the thing...
Standard User RobertoS
(sensei) Wed 24-Aug-11 19:09:15
Print Post

Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
Speedtest.net is known to be dodgy, often reporting speeds above what is possible. Especially if you have Kaspersky or Avira Internet security.

If AAISP have an internal IP Profile of 35Mbps on your connection, then you cannot get above that - period! I would also dispute the earlier statement that 35Mbps is a valid profile, particularly in your case. Your IP Profile is a BT Openreach figure, and any ISP internal copy of it should not be different for anything longer than their "update interval" for their copy.

Your IP Profile is 38717. Anything substantially different from that is highly questionable. There is certainly no blanket 35Mbps limit on BT Infinity, IDNet or Plusnet, and I'm fairly sure not on ADSL24, vivaciti, uno/xilo and probably most other suppliers.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User mr_bean
(regular) Wed 24-Aug-11 20:49:30
Print Post

Re: Some speedtest results for your use


[re: RobertoS] [link to this post]
 
If AAISP have an internal IP Profile of 35Mbps on your connection, then you cannot get above that - period! I would also dispute the earlier statement that 35Mbps is a valid profile, particularly in your case. Your IP Profile is a BT Openreach figure, and any ISP internal copy of it should not be different for anything longer than their "update interval" for their copy.
When this happened to me A&A blamed it on misreporting by the BT systems. If you ask they can set manually to 38Mb/s although it took a couple of emails to get the point through about the BT IP profile. To be fair I misinterpreted some of the things they said but once we'd got over the period of mutual misunderstanding the profile was raised and has been fine since.

"Not valid for FTTC" is the error returned by the BT systems for any attempt to set the DLM characteristics (interleave, target SNRM etc) for the line using the ISP's control interface - these can't be changed on FTTC lines (I suspect this is operational policy rather than for any technical reason).
Standard User RobertoS
(sensei) Wed 24-Aug-11 22:34:23
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Re: Some speedtest results for your use


[re: mr_bean] [link to this post]
 
In reply to a post by mr_bean:
If AAISP have an internal IP Profile of 35Mbps on your connection, then you cannot get above that - period! I would also dispute the earlier statement that 35Mbps is a valid profile, particularly in your case. Your IP Profile is a BT Openreach figure, and any ISP internal copy of it should not be different for anything longer than their "update interval" for their copy.
When this happened to me A&A blamed it on misreporting by the BT systems. If you ask they can set manually to 38Mb/s although it took a couple of emails to get the point through about the BT IP profile. To be fair I misinterpreted some of the things they said but once we'd got over the period of mutual misunderstanding the profile was raised and has been fine since.

"Not valid for FTTC" is the error returned by the BT systems for any attempt to set the DLM characteristics (interleave, target SNRM etc) for the line using the ISP's control interface - these can't be changed on FTTC lines (I suspect this is operational policy rather than for any technical reason).
That makes excellent sense.

Your first paragraph means AAISP have (strangely) got hold of the wrong end of some stick or other. As seemed apparent.

Your second paragraph I think is easier to explain, as I believe is technical rather than operational as you think.

The AAISP (any ISP) control interface will be into the BT Wholesale systems, affecting BT Wholesale MSANs/DSLAMs and the BT Wholesale DLM. But FTTC runs on BT Openreach DSLAMs in the cabinets, under an Openreach DLM.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User colesy10
(regular) Thu 25-Aug-11 07:58:54
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Re: Some speedtest results for your use


[re: Arceon] [link to this post]
 
Give them another ring and ask them to increase the BRAS to 38M or even 39M on Clueless.
Like I say when mine was on 32M, and then changed to 39M I saw an instant jump from the capped speed. Your speedtest result looks pretty ok to me though, not drastically wrong.
Even if it is for your own piece of mind, and not having a major affect throughput in your case then at least you know everything will be set to how it's supposed to.

The interleaving issue is what bugs me though. I see a fair few requests about it from customers on various FTTC isps, and it certainly doesn't seem easy to get it turned off, even if the BT openreach modem fails. (although as I understand it, it should just take a call from an engineer to the correct people/department).
Standard User RobertoS
(sensei) Thu 25-Aug-11 08:43:41
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Re: Some speedtest results for your use


[re: colesy10] [link to this post]
 
In reply to a post by colesy10:
The interleaving issue is what bugs me though. I see a fair few requests about it from customers on various FTTC isps, and it certainly doesn't seem easy to get it turned off, even if the BT openreach modem fails. (although as I understand it, it should just take a call from an engineer to the correct people/department).
This too is very strange.

Several people on FTTC with the tbbBQM running can clearly see interleaving automatically turning on and off quite freqently. The two I can recall immediately are myself, (but only one occurrence), and BillFord who used to report it regularly, both on IDNet, but there have been others - ISPs I don't remember.

So maybe this again is under ISP control at order time? With some choosing Auto and some On, or even Off. I can understand why switching later from On to Auto or Off may be less straightforward.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Arceon
(newbie) Thu 25-Aug-11 09:16:32
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Re: Some speedtest results for your use


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
Several people on FTTC with the tbbBQM running can clearly see interleaving automatically turning on and off quite freqently. The two I can recall immediately are myself, (but only one occurrence), and BillFord who used to report it regularly, both on IDNet, but there have been others - ISPs I don't remember.

So maybe this again is under ISP control at order time? With some choosing Auto and some On, or even Off. I can understand why switching later from On to Auto or Off may be less straightforward.


I know mine was set to "Auto" before I requested the change, but I can't honestly say I ever saw it switch on or off, it seemed to be just "On".

In reply to a post by colesy10:
Give them another ring and ask them to increase the BRAS to 38M or even 39M on Clueless.
Like I say when mine was on 32M, and then changed to 39M I saw an instant jump from the capped speed. Your speedtest result looks pretty ok to me though, not drastically wrong.
Even if it is for your own piece of mind, and not having a major affect throughput in your case then at least you know everything will be set to how it's supposed to.


I will do thanks. I spoke to someone on IRC about it but they just seemed to think the 35M was normal, which is what threw me a bit and made me decide against asking them to up it, I mean surely they must realise that a 35M cap on a 40M line isn't right?

I'll ask them to do it sometime soon, but like you say it's more for my own piece of mind than needing the extra speed (I upgraded from 8Meg heh).



Andrews & Arnold - FTTC Premium - Billion 7800N
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