No, but I'm not talking about what *is* done now. I'm talking about where we're going with this over the next few years.

Almost every future direction for DLM/DSM/DQM requires the central system to be in more and more control of every line, more and more dynamically, with less and less control over an individual line.

If that is the near future, then I'm not surprised that Openreach started with the position that no CP could fiddle with the details of DLM.

It is easier to never give control to the CP than it is to have to wrest it away in the future. Even easier than to explain why to Joe Public end-user.

Hi all,
I came across this thread by Googling, pure accident, but it's lucky I did as I can say exactly what happened.

Many months ago I had a Fritz!Box 7390 and I discovered I was able to change the target SNRM (well, offset it anyway), but further to that I could also set my own maximum sync rates on the downstream and upstream. This worked fine, and somehow I'm certain through my fiddling I managed to either confuse DLM or freeze it, as I've been stuck on a speed band of no interleaving for months now (60/20). No matter how many times I disconnect and reconnect modems/VDSL2 routers DLM doesn't do anything to my line now, always 60/20 with no interleaving. I prefer no interleaving so I'm happy with the accidental result. Whether I could do that again is another question, my experimentation was a result of trying to increase SNRM to turn off interleaving at the time.

My original thread on Kitz can be found at http://forum.kitz.co.uk/index.php/topic,11659.0.html.

Edited by Ixel (Tue 04-Jun-13 01:12:37)

Sounds like it has been "banded". Stop messing for a few weeks and it might sort itself out.

Indeed it's banded, 30000 min, 60000 max, it's been like this since around December last year. The most uptime I've had in a single connection is around 29 days. Otherwise the average has been between 10-15 days a time, on the most part. A few months ago I had an apparent line fault (battery contact or something), engineer fixed that and checked his JDSU noticing I was speed banded with no interleaving applied and was going to request a reset, unfortunately he didn't have an OGEA or whatever number it was that identifies my circuit. I rung BT Business instead and tried getting them to sort it out based on what the engineer suggested and told me to do, they were most unco-operative though in the fact that my line is achieving 1-2 megabits above the original estimate, despite the fact it can currently achieve up to 91 megabits downstream.

mine is set to min 37000 max 74000 its been like that since my fault and shows no signs of budging. However its not actually currently capping my sync due to the insane levels of crosstalk I am suffering from.

My modem will be turned off likely in the next week or so for a while as I have to start investigating a weird electric meter issue so will be turning everything off. I am hoping I dont get any new banding if the modem is turned off for a long time.