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

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

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.

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!

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...

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 ....

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.

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?

What does the BT speed tester say? Please post as far down as the end of the upstream figures.

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

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)