So, a week or so later with a very stable line, my SNR is back up to what it was before, my speeds are no better, and CS are advising me that all is well because my speeds are within BTW�s estimated range and therefore they won't change the line profile up beyond 14Mb.

Feel a bit like I'm hitting my head against a brick wall here.

"Customer called as he believes he has a speed issue, his line is rated to 16Mbps with a recommendation of approx 14 Mbps He has advised he is getting 13.4Mbps

Advised that there is no issues at all with the speed of the service"

I'm in a rush now, but have had to track back to your opening post to see a "Rate" figure. The "Attainable" is not the main figure to look at. That is not relevant to the IP Profile or actual speed. The "Rate" is what we should be looking at, with the "Attainable" as additional info about the line.

Having said that, things don't look to be as they should be. I'll go through the thread again in more detail laer, but stats including the Rate would be useful in the meantime.

Ask and ye shall receive:

Downstream/Upstream
Line Coding(Trellis): On On
SNR Margin (0.1 dB): 98 119
Attenuation (0.1 dB): 100 59
Output Power (0.1 dBm): 215 122
Attainable Rate (Kbps): 22176 23601
Rate (Kbps): 15285 8280

Your line is currently syncing at 9dB. The DLM does have a target of 3dB, are you able to try a resync to see if this will push your SNR sync margin down?

In reply to a post by chrispurvey:

Your line is currently syncing at 9dB. The DLM does have a target of 3dB, are you able to try a resync to see if this will push your SNR sync margin down?

That was actually right after a resync. It was 3dB for a while but went back up to 9/10 for no apparent reason about a week ago.

In reply to a post by chrispurvey:

Your line is currently syncing at 9dB

OP's line should be capable of 24 Meg @ 6dB. A 3dB or even 6dB decrease in NM does not fully account for the 9 Meg loss of sync speed he is seeing.

So something is causing noise on the line, I'm wondering whether this is the reason your speeds a as they are due to this.

Something is causing your line to error as Interleaving has been turned on. Have you been able to try another micro-filter? We may also need to look at getting a new master socket fitted as you have an older style one.

In reply to a post by chrispurvey:

So something is causing noise on the line, I'm wondering whether this is the reason your speeds a as they are due to this.

Something is causing your line to error as Interleaving has been turned on. Have you been able to try another micro-filter? We may also need to look at getting a new master socket fitted as you have an older style one.

While it'd be good to know whether you've got data showing noise or whether it's just that interleaving got switched back on, I'm certainly happy to help troubleshoot things from my end and can certainly swap the filter over, I also have another router I could try if you'd like to rule that out too.

I updated ticket #86296837 a couple of days ago though I haven't had a response yet, so I'm currently listening to your hold music once again. I'm wondering if there's anything special I should say to not get the same shrug-off I got last time I called.

You may find this http://forum.kitz.co.uk/index.php?topic=12310.0 interesting with regard to very short lines

It would certainly be worth trying another filter and also router to see if there's any difference.

You'd be best to do the above prior to speaking with our support team to be honest, once you've done that let me know if there's any difference.