Request for a noise margin fix
For reasons unknown, BT have upped my noise margin from a stable 6dB to 12dB.
So I raised a ticket with Plusnet - 26450832
In part, the response consisted of
I mentioned that I'd been able to override my modem to get the noise margin down to 9dB for which I was told:-
Is all of this a new policy?
No investigation of my line was undertaken by Plusnet.
BTW Was SA involved in this "analysis" - I don't have the impression that the standard of grammar is quite up to Plusnet's usual standards?
So I raised a ticket with Plusnet - 26450832
In part, the response consisted of
Quote Thank you for your request. The current SNR rate that you are receiving is within the required range of 6-15dB
I mentioned that I'd been able to override my modem to get the noise margin down to 9dB for which I was told:-
I know this to be false - my line will never recover from a noise margin hit.
Quote ...the SNR rate does not require manual adjustment. The main reason for this being that the system monitors each individual line and if the line's SNR is 9dB it will automatically reconfirgure the line to that rate again.
Is all of this a new policy?
No investigation of my line was undertaken by Plusnet.
BTW Was SA involved in this "analysis" - I don't have the impression that the standard of grammar is quite up to Plusnet's usual standards?
It has become more difficult recently for us to convince BT Wholesale to make manual SNR changes. Usually we can convince them to do so if we put forward the right arguments, however I have known for them to refuse outright on occasion.
I can confirm that SA were not involved in this analysis, however I am sorry if you feel the response you had was not up to usual levels of support.
I have updated your fault ticket and have put a specific request to BT Wholesale requesting the SNR be changed to 9dB as per your request. I cannot guarantee this will be done on our first request though
I can confirm that SA were not involved in this analysis, however I am sorry if you feel the response you had was not up to usual levels of support.
I have updated your fault ticket and have put a specific request to BT Wholesale requesting the SNR be changed to 9dB as per your request. I cannot guarantee this will be done on our first request though
Quote from: Ian It has become more difficult recently for us to convince BT Wholesale to make manual SNR changes. Usually we can convince them to do so if we put forward the right arguments, however I have known for them to refuse outright on occasion.
I have updated your fault ticket and have put a specific request to BT Wholesale requesting the SNR be changed to 9dB as per your request. I cannot guarantee this will be done on our first request though
I think someone has misread my request!!!
I mention that BT had increased my noise margin from 6dB to 12dB but that I had succeeded in getting my modem to reduce this to 9dB.
I don't want 9dB - I want my 6dB back!!!!!!!
See attachment for the last months performance (in green).
Quote from: axisofevil I think someone has misread my request!!!
I mention that BT had increased my noise margin from 6dB to 12dB but that I had succeeded in getting my modem to reduce this to 9dB.
I don't want 9dB - I want my 6dB back!!!!!!!
Apologies, that would be my fault!
I shall change this to a 6dB request in the morning when I get to work.Also please bear in mind that it is probably line instability or interference has caused the SNR to increase in the first place, as such bear in mind that if we are successful in getting this reduced for you there is no guarantee that it won't increase again at some point.
Thanks for your help.
I can't think that it's your "average" interference - since it only kicks in every few months or so.
When ADSL2 arrives will it reset noise margin automatically (the present system is strictly one-way)?
I can't think that it's your "average" interference - since it only kicks in every few months or so.
When ADSL2 arrives will it reset noise margin automatically (the present system is strictly one-way)?
Quote from: axisofevil When ADSL2 arrives will it reset noise margin automatically (the present system is strictly one-way)?
I honestly couldn't answer that question. I'll update you tomorrow if I can find out.
*Apparently* though, DSL Max is meant to reset the noise margin automatically if the line remains stable for 14 days. I'm yet to see it happen though
I'd heard "when you least expected". And I've seen that happen perhaps once 
B.
B.
Quote from: axisofevil When ADSL2 arrives will it reset noise margin automatically (the present system is strictly one-way)?
Got an answer for you.
Apparently on ADSL2 the SNR can increase or decrease as often as every 3 days.
Whether we will see this happen in practice, I guess we'll find out
Quote from: Barry I'd heard "when you least expected". And I've seen that happen perhaps once
Once more than me
Though I guess from a support perspective I only generally see these issues when they don't happen, so I might be a little biased.
Wonder who your source of information was Ian?
Basically, the line will be try picking up a better SNR level after 3 days. If it becomes instable again, then the SNR will raise for a longer period, then go back down again if the line is stable, and so on and so on.
Basically, the line will be try picking up a better SNR level after 3 days. If it becomes instable again, then the SNR will raise for a longer period, then go back down again if the line is stable, and so on and so on.
That sounds reasonable.
I've never seen it happen though.
I've never seen it happen though.