In reply to a post by BatBoy:

BT Traffic shaping?

I doubt it. There are others I have seen with similar results and they are not on BT. Also, I can initiate a very large upload - say 400-800MB and it will run at 18Mbps quite happily.

I haven't seen the effect on anything other than BT Retail. The actual speed isn't the problem, it's the slow ramp up at the start which your earlier speedtests don't have.

I did a tbb test a few minutes ago.

Another example:

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

Ooo, interesting.

In reply to a post by MHC:

Are you an an 80/20 service? If you are it looks as though you have got the "stuck at 10" problem. I suffered from this for a short while and it took several long technician visits with 3rd line support involvment to sort it out.

Yuck. Yes, that looks familiar. I am on an 80/20 possible service, and just assumed it was the quality of my line limiting me. I'm on BT Infinity 2 and should just be out of minimum term contract today. Wondering about which ISP to migrate to. Maybe AAISP to fix the fault. (I'd love to, but their prices for 80GB a month usage are too high for me).

Not sure if any of this helps?

Max:	Upstream rate = 9780 Kbps, Downstream rate = 59080 Kbps
Bearer:	0, Upstream rate = 9739 Kbps, Downstream rate = 53695 Kbps

Link Power State:	L0
Mode:			VDSL2 Annex B
VDSL2 Profile:		Profile 17a
TPS-TC:			PTM Mode(0x0)
Trellis:		U:ON /D:ON
Line Status:		No Defect
Training Status:	Showtime
		Down		Up
SNR (dB):	 5.4		 6.4
Attn(dB):	 21.1		 0.0
Pwr(dBm):	 12.8		 6.6
			VDSL2 framing
			Bearer 0
MSGc:		18		26
B:		51		237
M:		1		1
T:		64		38
R:		12		16
S:		0.0308		0.7762
L:		16616		2618
D:		1051		1
I:		64		127
N:		64		254

I presume you are on a Residential service ... so talking to Tech Support will be a battle!

The stats suggest that you only have a 6dB noise margin and that is what is holding it down as with your downstream. It just looks a little suspicious - does it ever vary?

Your downstream is similar to mine - achievable 59, so I would have expected to see something above 15 for upstrream, unless there is a massive band of noise right on the U1 or U2 band of tones.

Can you get a plot showing each Tone with the bit loading, attenuation and SNR? That would be useful.

and there are others around.

In reply to a post by MHC:

I presume you are on a Residential service ... so talking to Tech Support will be a battle!

Exactly my concern. :-/

The stats suggest that you only have a 6dB noise margin and that is what is holding it down as with your downstream. It just looks a little suspicious - does it ever vary?

Not that I've seen. I have DSLstats running and recording a graph every so often.

Your downstream is similar to mine - achievable 59, so I would have expected to see something above 15 for upstrream, unless there is a massive band of noise right on the U1 or U2 band of tones.

Can you get a plot showing each Tone with the bit loading, attenuation and SNR? That would be useful.

Ok, here are some links:

Here is the BT estimator output:
http://i612.photobucket.com/albums/tt201/MisterReder...

Here are some VERY OLD stats from Sept 2012:
http://i612.photobucket.com/albums/tt201/MisterReder...

Here are some recent stats.

From yesterday:
http://i612.photobucket.com/albums/tt201/MisterReder...

From today - SNR per tone:
http://i612.photobucket.com/albums/tt201/MisterReder...

QLN:
http://i612.photobucket.com/albums/tt201/MisterReder...

HLOG:
http://i612.photobucket.com/albums/tt201/MisterReder...

Bitloading:
http://i612.photobucket.com/albums/tt201/MisterReder...

I might have to use the other script as sharing the output from dslstats is a pain.

U1 does seem a little low and the drop down to U2 is quite drastic. I noticed the earlier stats suggested 12Mb could be achieved.

It may be worth a call just to see.