FTTC speed prediction lower for flats? :: Fibre Broadband

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Andrue
(knowledge is power) Thu 21-Mar-13 11:33:15

Re: FTTC speed prediction lower for flats?

[re: deleted] [link to this post]

In reply to a post by jrawle:
In reply to a post by Andrue:
If you have an antivirus, advert blocker or anything of that ilk try the test without it/thenm. This is speaking from personal experience. There is a long running history of users who have 'accused' TBB's speed tester of having an upstream fault. I was one of them until I discovered that closing down (not just disabling) my ad-blocker fixed the problem.

Also try other speed testers. Oddly, speedtest.net was mostly immune to the problem and it's always good to have a selection of testers rather than relying on just one.

Most of my tests were with speedtest.net. I always achieved the max upload speed when on ADSL. I do have an ad blocker installed, so will try it without that to eliminate that possibility.

I always got full upload speed with ADSL as well. I'm still puzzled about it but it's a known issue. Presumably it relates to the amount of processing so it's proportional to the speed, ADSL upload is too slow to notice a problem.

---
Andrue Cope
Brackley, UK

Just because he could. RIP.

RobertoS
(sensei) Thu 21-Mar-13 12:00:37

Re: FTTC speed prediction lower for flats?

[re: Andrue] [link to this post]

The upload issue on the old tbb speed test started in late October 2011 or early November, but seb has no idea what caused it as I can't give an even approximate date.

My 40/10 always showed over 8Mbps then suddenly dropped to the 6Mbps+ range.

07/12/11 00:24 Wed 35688 Kbps 6007 Kbps
18/11/11 23:57 Fri 36249 Kbps 5999 Kbps
24/10/11 12:24 Mon 36377 Kbps 8316 Kbps
10/10/11 10:26 Mon 34956 Kbps 8301 Kbps

Speedtest.net continued to give the 8Mbps+ readings. NetWorx realtime upload graph was steady at the reported speed of each.

On the new tbb Flash test the upstream seems correct. Over 14Mbps on a 15.2Mbps sync.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 54.2/15.2Mbps @ 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.}

jchamier
(knowledge is power) Thu 21-Mar-13 19:06:08

Re: FTTC speed prediction lower for flats?

[re: RobertoS] [link to this post]

In reply to a post by RobertoS:
On the new tbb Flash test the upstream seems correct.

Unless you're using a Mac, where Adobe Flash for Mac seems to have issues with the tbb speed test. (Current workaround is to use Google's Chrome browser for Mac which includes its own embedded flash, but one day that will get updated).

James BT Infinity 2 19/09/2012 - Speeds ~46 / ~8.5 Mbps - Sync 48.9 / 10 Mbps @ 470m
_{Huawei modem -> Draytek 2820 -> Airport Extreme -> Switch -> Windows/Mac/Linux/NAS/Phone/TV

13 years of broadband - 1999 ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(19M/16M)/BT FTTC(46M)}

Chrysalis
(legend) Thu 21-Mar-13 20:42:46

Re: FTTC speed prediction lower for flats?

[re: RobertoS] [link to this post]

alot of upload issues on speedtest sites are caused by a too small tcp send window.

on speedtest.net eg. all the uk servers have the problem as well as the BTw tester, but ookla made a BETA .nl server on speedtest.net which has a bigger buffer and as such produces full speeds for uploads on the test.

BT Infinity 2 Since Dec 2012 - Estimate 65.9/20 - Attainable peak 110/36 - Current Sync 70/20, Current Attainable 68/23 frown

deleted
(deleted) Fri 22-Mar-13 13:07:08

Re: FTTC speed prediction lower for flats?

[re: Chrysalis] [link to this post]

Just out of curiosity, what size window are they using (to save me getting wireshark fired up...)?

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