>>> Let's do without it entirely?
Worked fine with BE.
My thoughts entirely - I like BE's DLM, no complicated algorithms & No IP profiles.
Just a straight forward set of various target SNRMs and levels of interleaving.
Tiscali used to have a huuuge range of profiles, but even they were transparent and easily configurable by the SP.
The problem with the BTw DLM is that no-one really knows for sure what can trigger it.. and no other system seems to have had so much problems with stuck profiles - although admittedly it is better than it was. But theres still instances where the DLM seems to have a mind of its own and over-rides interleaving status.
As mentioned above the main gripe by the EU's is the IPprofiles and the limiting of throughput speed. The idea of the IPprofile is that it stops un-necessary traffic at the bRAS from going down the backhaul pipes and clogging up at the exchange. Years ago I could perhaps understand the necessity more than what I do today. Afterall the internet is full of routers/switches/links which are going to have different speed limitations... even on our LAN outgoing traffic is very often limited by upstream dsl speeds.
More investigation would be needed to find out how much of a bottle-neck the backhaul is... and this is unlikely to be the same for different exchange sizes.
Sky's DLM (to me) seems the worst of the bunch in that you are assessed during a short time frame, then thats practically it. But then again sky have always been a bit tight on their profiles. 2Mb was never 2Mb.. it was 2000kbps and they didnt allow for certain overheads which at least BTw did.
...... and on that subject... when I get some free time I need to do a bit of digging about Plusnets profiling system and overheads. This is something I raised many moons ago on maxdsl and iirc something satisfactory was put in place which I see no sign of now on FTTC... but I need to look again properly before I go spouting my trap off.