IP profile restricted - too much?

[#1]

MY IP profile is set to 3.13 mb/s which seems very slow for the line attenuation of 44dB/14.3db noise. I'm using the Netgear DGND3700v2 router. Peak speeds are much higher, showing the line is capable of more.
<a href="http://www.thinkbroadband.com/speedtest/results.html?id=139710212613688982038"><img alt="My Broadband Speed Test" src="http://www.thinkbroadband.com/speedtest/button/139710212613688982038-mini.png" /></a>
Is it possible to reset the profile and see if a higher speed is practical?

[#2]

Hi vierne,
Welcome to the Forums
I've taken a look at your line. Your SNR Target is 15db which is quite high for your line, we can reduce this for you but I want to run a few things by you first.
Your Profile: BT IPStream Max 448/15dB/Interleaved
BT IPStream Max - This means that you're on the 'Up to 6Mb' (ADSL) variant as opposed to the 'Up to 16Mb' service (ADSL2). Given the length of your line, I think you would benefit from being on ADSL2, we could probably get you extra 1Mb on top of the increase we would get from lowering your SNR.
448/15dB/Interleaved - Your upstream is capped at 448K, we can uncap this free of charge for you, if this is something that would be of use to you. Your SNR Target is 15db, normally for a line of your length, we would set this at either 6db or 9db, I'm happy to lower this for you. The lower the SNR, the higher your sync rate will be.
Interleaving, I recommend leaving this on unless you play online games, but even then it shouldn't cause you too many problems.
If you're happy for me to make any of the above changes, I'd be happy to, but I'd prefer for you to choose which changes I make to your line

[#3]

Many thanks for offering to sort this out Chris!
Yes, please can you move me to ADSL2.
Please also uncap the upstream, this would make a worthwhile difference to my business.
Please also lower my SNR target as low as it will go. I don't play online games so no problem.
Every bit extra I can get helps! Little sign of any broadband upgrades in the next few years out here in the sticks, despite the political rhetoric.

[#4]

I've placed a modify order on your line to move you to ADSL2+ and uncap your upload.
This will complete tomorrow(15th), let us know if it's helped/worked.

[#5]

Thanks Chris. My upstream speed has more than doubled, but my IP profile on download has gone down! See BT test attached.
I've put the modem in ADSL2+ mode, switched it off and on again - no change.
Should I wait, or does the IP profile need resetting?
Thanks!

[#6]

I think - from my ancient memory
That moving from ADSL1 to ADSL2+ doesn't change the default noise margin, interleave status, etc.
If you post the router stats I think we will see that the noise margin is still 15dB and so, if I am correct, it will need a line reset to fix

[#7]

Hi vierne,
Thanks for getting back to us.
I can see that your upstream has been uncapped which is great to see. The move from ADSL1 to ADSL2+ puts your line automatically into a 10 day training period again - this means we're unable to complete a reset your line to a lower SNR Target to push your speeds up.
I've just e-mailed our suppliers to see if they will do this manually for us given the circumstances - I've requested your SNR Target be set at 6db given the length of your line. We should start to see an improvement within the next 24 hours.

[#8]

Good progress Chris but my download speed isn't budging from around 2900 kb/s over the last few days. Upstream is excellent at 800Kb/s and higher.
The modem is showing a link rate as follows:
ADSL Link   Downstream   Upstream
Link Rate    4995 Kbps   1035 Kbps
Line Attenuation 44.5 dB   25.6 dB
Noise Margin   5.9 dB           6.5 dB
BT line tester is showing an iP profile of 4.61Mb/s.
I would have expected the download to be nearer 4 Mb/s by now.
Anything else I should do please?

[#9]

Hi,
Your slow data transfer could be impacted by the PN profile.  Check your 'current' speed on the PN user portal, it might not yet have caught up with the BT changes.
However, your synch rate is low for the line's attenuation, so you need to follow the slow speed investigation guide at the top of this forum.
Do a quite line test - dial 17070 option 2 - if the line is noisy then contact your phone provider.
Please describe how your router is connected to the phone line.
Is the router plugged into the master socket?  If not try that, if it is, try the test socket behind the face plate.  If you see improvements from this, then there is a problem with your internal wiring.
Run the BT wholesale speed test and further diagnostic option.
Post router stats again if you see any improvements.

[#10]

Download has now jumped to 4.2Mb/s and I've very happy with that, download is now 50% better and upload 100% better than when I started!
Many thanks Chris x 2 for sorting this out for me.
I'lll take a look at the suggestions you've all made over the next few days, the wiring may well be an issue and living in a rural area doesn't help with the phone line. I'm lucky to get these speeds, many round here get less than 0.5Mb/s.

[#11]

Vierne,
Your data transfer rate is a little slow for your synch speed, your synch speed is slow for your line attenuation.
Are you in the master socket?  I think your line might be capable of doing a bit better than it is at present.
Can you post your full stats including error counts?

[#12]

Quote

I think you would benefit from being on ADSL2,

... and then

Quote

I've placed a modify order on your line to move you to ADSL2+ and uncap your upload.

How about trying ADSL2?   That line doesnt use any of the adsl2+ frequencies,  yet  would benefit from the better algorithms &  less error correction overheads used in adsl2/adsl2+
Op may be able to force adsl2 himself on the modem.
Also take note of Townmans post above.

[#13]

I've just taken another look at the line and it seems to be operating around where we would expect.
The Line Attenuation is 48.0db and you are syncing at 4615K so that's looking pretty good at the moment. Your SNR is sitting comfortably at 9db. Unless you're having any further issues, I'd suggest us leaving things as they are.

[#14]

Yes, it seems pretty stable at that.
Many thanks.

[#15]

Well the line has moved off down the slippery slope again. I'm now only syncing at 3883K and the SNR has crept up to 11 (about 11.3 daytime, 10.7 at 0500 as I write this) or so. Could we try resetting the SNR to 6dB again please?
I'm wondering if I should buy a modem with a settable SNR? I'm currently using a Netgear DGND3700v2 which it seems is hackable but the process to reset the SNR is beyond me.