Very likely

In reply to a post by 4M2:

13.85Mbps x 1024 = 14182Kbps - could be something to do with that

Good spot!

But, equally alternatively, the router does not exhibit many significant figures in its results.

So, Sync = 15.7 Mbps x 1024 = 16077 Kbps True.

IPP = 14.18 Mbps = 88.2 % of True Sync.

I'd back this calc as I've never found the BT IPP "out-of-sync" with my routers' reported Sync Speeds, leading to the conclusion that the BT Home Hub is using the unconventional M = 1024 * K.

Ok, I have just had a chat with BT India regarding my sync speed not coming close to what I was predicted by their systems, wasn't expecting to get much help from them actually but the guy did a line check, found the speeds I am getting then said he was matching them with the 'system details'.

He came back saying there is a fault on the line, he suspects it is a network fault and has escalated it to the 'Network Fault Specialist Team', who are due to call me back later today.

Maybe finally we can get somewhere with this underperformance problem, however when I track the fault with BT there is a little diagram showing the 'BT Retail Servers' highlighted, but I can't see how the problem would be with BT Retail

"Maybe finally we can get somewhere with this underperformance problem, however when I track the fault with BT there is a little diagram showing the 'BT Retail Servers' highlighted, but I can't see how the problem would be with BT Retail"

No idea what you are talking about here. The sensible thing would have been to wait for the training period to complete and it is unusual for BT to take a fault report in the first 10 days. So half expecting this to turn out into a nothing will happen scenario.

The problem is the OP doesn't give us the full picture most of the time and tends to selectively answer questions. Also IP Profile and throughput seem to concern him more than downstream sync speed, attenuation and SNRM values.

Probably the call to BT support will only confuse matters even further...

@MrSaffron Basically BT found a broadband line fault in their tests, so what difference would it make waiting till the end of the 10 days if there is still a line fault?

I am concerned with anything basically which affects throughput, whether it be attenuation, sync speed or Noise Margin values.

@4M2 what haven't I given the full picture about? I'm keeping this thread updated as things change and happen

I'm not sure I understand the "M = 1024 * K" that @XRaySpeX mentions above, is he saying there is a difference between my reported sync and the true sync?

Edited by deleted (Tue 26-Mar-13 16:00:34)

Please give us the full results of the BT speed tester...

4M2 was postulating that there is a difference between your reported IPP and the true IPP, while I was saying it was more likely there is a difference between your reported sync and the true sync; both by the same factor of 1.024.

BTW Speed Test has a slightly different layout for my new connection:

Downstream:

Download speedachieved during the test was - 13.5 Mbps
For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.
IP Profile for your line is - 14.18 Mbps

Upstream:

Upload speed achieved during the test was - 0.68Mbps
Additional Information:
Upstream Rate IP profile on your line is - 0.83 Mbps

Sorry I'm on partial LLU these days, but does the BT speed tester still give a value for the downstream "DSL Connection Rate"?