New FFTC Connection, Router Stats

Hi there,

Had FFTC installed today. Was previously on ADSL on a very long line, 62db attenuation, 3mbit sync.

I was advised by Sky/BT that I would get 32mbit from FTTC. It was installed today, and I'm getting 38mbit.

I only ordered the 40/10 package, as the estimated speed was 30mbit and I'm around 600 meters from my cabinet, following the road.

Here are my router stats:

http://img22.imageshack.us/img22/4395/80wk.png

Speedtest:

http://www.speedtest.net/my-result/2869262320

From what I understand, if my line was capable of more than 38mbit, it would say higher for 'max' obtainable rate, so I guess i'm best off staying on the 40/10 package.

My upload speed seems a little lower than what I expected, but it's still alot faster than what I had, so extremely pleased all round.

Would appreciate it if someone who can interpret my line stats to advise me if I reached the right conclusion to stay on 40/10, instead of upgrading to 80/20 and not getting any faster etc..

Many thanks!

Edited by dave2150 (Tue 30-Jul-13 12:14:02)

You are right ... The Max Downstream/Attainable rates are the highest your line can support - at that moment in time and would show any higher figure. If the weather changes, atmospheric noise increases/decreases, local noise sources change, other users are added &c then the Max Attainable will change, but not enough to make going for a higher speed package worthwhile.

Similarly with your upstream - the max is just over 8Mbps so a /20 package would cost for no extra benefit. 6.85 is a little low but that could be congestion (for example). Can you run the TBB speedtest and see what that gives - it will also show a little graph that plots the performance during the test.

I noticed it's not using one of the downstream bands - is that because it was no good or because the service profile limited it ?

Probably because it is of no use ... D3 uses tones 2792 - 4083 and I would guess that attenuation would be around 90dB at the low end given that in D2 it is averaging 60dB and extrapolating the SNR graph would put that at around 0 - 3 dB at the start of D3. Bits per carrier is just 2 at tone 1750 which is below the top of D2 (1959).

In reply to a post by MHC:

You are right ... The Max Downstream/Attainable rates are the highest your line can support - at that moment in time and would show any higher figure. If the weather changes, atmospheric noise increases/decreases, local noise sources change, other users are added &c then the Max Attainable will change, but not enough to make going for a higher speed package worthwhile.

Similarly with your upstream - the max is just over 8Mbps so a /20 package would cost for no extra benefit. 6.85 is a little low but that could be congestion (for example). Can you run the TBB speedtest and see what that gives - it will also show a little graph that plots the performance during the test.

Thanks for the reply. I didn't realize it was 40/8, I thought it was 40/10 for some reason.

Is it just a coincidence that my max attainable upstream is the same as as my upstream sync?

Here is the TBB speedtest as requested:

http://www.thinkbroadband.com/speedtest/results.html...

The 8Mbps is the MAX that the line will support.

And the 6.8/6.9 is probably due to the slow rise on the upstream - the peak value is probably over 7.5 Mbps. I get the same issue on one PC - resulting in 17Mbps and a different PC has an instantaneous rise that give 18.5 Mbps.

Edited by MHC (Tue 30-Jul-13 14:56:54)