In reply to a post by XxSiuxX:

SNR Margin (0.1 dB): 116 51

That 12dB Target is what's killing your Sync speed, not the IP Profile, which is right for your Sync. You would get about 3 Meg more if it were lowered to the normal 6dB.

Whether it would be unstable is uncertain. Is there any history of instability? What was your Sync last year after it settled down?

Back when I was using the Netgear DGN1000 router, I would get randomly disconnected sometimes, but I think it was just the router overheating or something which is why I replaced it and have no problems now, maybe once a month or something the connection would drop for about 20 minutes and come back on. I am happy with the stability of my line, just not with the download speed. I can't remember the exact sync last year but when I was connected for the first month or two I was getting around 10MB. But than, all of a sudden, around June I checked my router stats using the Netgear router and I was getting:

ADSL Link: Downstream Upstream
Connection Speed: 6648kbps 1163kbps
Line Attenuation: 23.9db 11.2db
Noise Margin: 18.2db 6.1fb

Than in July my stats changed to:

ADSL Link: Downstream Upstream
Connection Speed: 11448kbps 1144kbps
Line Attenuation: 24.0db 11.0db
Noise Margin: 14.9db 5.8fb

Since than, my downstream hasn't fallen below the 10MB mark. Is there anything I can do to lower the 12dB?

To all who believe their IP Profile is stuck: IP profiles on 21CN WBC are generally and promptly dependant as 88.2 % of Sync Speed.

Since this new system of IP Profiles came into being I don't think I seen any that are not 88.2 %.

In reply to a post by XxSiuxX:

Is there anything I can do to lower the 12dB?

Orange/BT or their DLM can lower it. In the 1st 3 months of WBC last year they stuck me on 12 or 15 dB target and I was getting much lower speeds than LLU. So I wrote to them (phone support was useless having no idea of BB technology) insisting they lower it to 6 dB. Eventually they did and later still further to 3dB. Now I'm going much faster than LLU .

Alternatively, if you get a suitable router, e.g. Netgear DG834GT or DG834G v4, you can tweak it yourself. I have the former, but I prefer he ISP get it right in 1st place and I just tweak the margins.

I have to agree the phone support isn't very helpful at all. if I decide to write to Orange what address do I send it to? And is it as simple as asking them to lower the dB?

Addy is on their Contact Us pages.

Well, I had the comparative argument that my line was capable of more as it had been faster on LLU with the same ADSL2+ technology.

Hello RobertoS,

My reply on this was done while I was travelling, so not about training more about my phrasing and typing. I will be more considered in future. I had a look at your site, it's impressive and must have taken some time to put together.

I agree 0.9 db is not typical and is too low and doing a further power cycle on the router hopefully will settle this back to hopefully 3-6db. If not we will take further steps to investigate.

Across the network, the majority of noise margins sit between 6-12db, each 3db step will represent around 1-1.5Mbps. But obviously Fast and Interleaving (including depth) in conjunction with DLM rules and line profile will also affect this.

Rephrasing : In a pure noise free environment 17-18db will give around 20Mbps. The line rate I quoted 13-14Mpbs falls within an 'accepted' range for this attenuation and reflected the very first post made by dsharp67.

Based on your experiences you can understand that there are a wide variety of factors that influence noise margin on one off induced presence during training or something that has longer term affects. By resetting the line we have removed any historical data with DLM and will now take into account any improvements on the line.

Dsharp67 is still being monitored by my escalation team.

RobertoS you are welcome to PM me if you want any clarifications.

Regards

Edited by UKDoc (Mon 19-Mar-12 15:48:11)