Speed increase

Hi,

My max d/l speed has jumped from 3.6MB/s to 4.7MB/s and my profile is now 38714.

My upload speed seems to have dropped from the previous 1 MB/s to 0.8 MB/s

What has BT done? My modem and router have not been rebooted for ages.

DrT

Funnily enough mine has had a big tweak used to be about 31000Kbps approx

IP Profile for your line is -38714 Kbps
Upstream Rate IP profile on your line is - 10000 Kbps

Wonder if they will increase it again, maybe they are doing it in stages? Or thats the max I`ll see ??

I wonder what is going on, not that I am complaining. I doubt that many would notice this. I only noticed as I have a full-time download graph on display, and noticed my d/l shooting past the previously configured maximum.

DrT

Same here, from about 34500Kbps, and it also went back to fastpath this morning.

It improved immediately after that major BT outage about a week ago, but not to the full 38717. Odd.

It's probably relates to the BT change from the original 8c profile to the new 17a profile, in readiness for next year's speed doubling.

See here for a bit more detail:-

Speed increases

I had always assumed that if one was NOT getting the max speed out of a service, then increasing the maximum would not have any benefit.

DrT

Not true, because the service is now using more frequencies on the line, so similar to people who don't get the full 8Mb on ADSL Max still saw an improvement by moving to ADSL2+ (which had more frequencies)

James

Hi James,

Personally, I did not notice any improvement from ADSL > ADSL 2+. The any improvement was being on LLU and not being bound by BT's profiling system.

Regards

DrT

so does this mean I have reached the ceiling on my connection or is there more tweaking to come!

The service is limited to 40Mb/s, which appears to be our current maximum. The ceiling will be raised at some time in the future. To what and when I do not know.

DrT

Like any DSL technology, you are limited by distance. The higher frequencies will not travel as far... so if you are distance-limited, then the change of profile (alone) will not increase your speeds.

However, it looks like BT are rolling out a change in bandplan (from 997 to 998) at the same time as the change to profile 17a.

The main differences are:
- In the existing frequencies (under 7MHz), around 0.6MHz is swapped from upstream to downstream
- The first 1.5MHz of the new frequency allocation (above 7MHz) is given to downstream; if they stuck with 997, it would have gone to upstream.

This means that, if you are distance-limited, you will still see a re-arrangement of your upstream & downstream speeds - which could be a gain as high as 5Mbps on downstream and a similar loss on the upstream (but probably only if you are on a package with a 10Mbps upstream)

And where you aren't distance-limited, you will still be limited to the 40Mbps that you've bought from the ISP. The jump to 80Mbps does not appear to be free, and will need to be ordered from your ISP.

@ WWWombat

Thanks, that seems to explain my observations.

DrT