Going through the posts here one at a time
I'm up on the site so my stats should be available under aneesh99.
MDWS doesnt show
framing params for the Bearers. They arent something that is graphed because they are static figures.
Presuming you have a VMG8324, you can however get them from adsl info --stats
I was told in no uncertain terms that the reason was a 'hot VP', clearly given my symptoms of masses of errors and a tanking sync speed doesn't really fit that picture...
No - a hot SVLAN does not and will not cause Err Secs to trigger the DLM.
You must have
either had an excessive amount of errors over a few days (MTBE)
OR an excessive amount of resyncs over the course of a few days (MBTR).
There is also something called '
ILQ Scarlet' which can be triggered by a really excessive amount of retrains within a short time frame. Unfortunately unlike MTBR and MTBE I don't think Openreach discloses what causes ILQ scarlet.
One thing springs to mind here - WilliamG's 'line fault' that wasnt a fault (he did a pile of resyncs to test the DLM despite being advised not to). He ended up getting banded and we assumed he had triggered ILQ scarlet. We never saw the results of one of his GEA tests though (BTr dont give them out) so don't know what profile he was on nor what it would have said for the speed.
All we do know is that he got banded and it wasn't removed by an automated/remote DLM reset and after a few months of it not budging, it had to be done by an OR engineer.
So based on my stats so far, ILQ green, I can't understand why DLM hasn't done anything for the past four months
With G.INP I strongly suspect there is another parameter that Openreach measures rather than Err/Secs when deciding to relent.
MTBE and MTMR may well be the triggers for DLM to take action , but what is excruciatingly difficult to find any information about is how it reverses this procedure.
If a line has retransmission then I suspect it may be the LEFTR stats. I did try asking Ian Lawrence if LEFTR was monitored if a line had G.INP applied, but he neither denied nor confirmed this and remained tight lipped. There was a court case about 2yrs ago between BT & ASSIA. Since then they don't disclose a lot about the DLM process.. and we have a gap in knowledge on how DLM
reverses any previous action.
Whilst you may currently be ILQ green, it would be interesting to monitor not just Err Secs but also LEFTRS. Unfortunately I dont think MDWS records these. If Tony is reading - it may be an idea if these could be recorded in the same way as Err Secs for lines with G.INP, as I think (ASS-u-me) they could be important when it comes to reversing a previous profile.