just read through most of this...
been a good read, I think I understood how it works as soon as BS said it (as it seemed the only logical way) and as I read on i was confirmed right
, the "banded profile" must be determined by DLM at time of connection, from the line stats it determines the best BP for that line and assigns it, connecting anywhere from the home to DSLAM the sync output is the same, totally understand that - but if you were to shift the house back (quite far) then DLM would see that it cannot operate a connection on that BP anymore and must lower it....and anywhere from the 'shifted house' to the DSLAM you would be the same new lower profile..
...least thats how I see it.
what concerns me is the amount of crosstalk that 'appears' to be picking up as more and more VDSL connections go live - it kinda makes me hope we DONT get FTTC if all ive got too look forward to is watching my 40Mb connection slowly dwindle away to 'slightly better' than top ADSL2+ speeds...
whis is why they need to get Vectored VDSL installed ASAP... i heard Alcatel-Lucent had a design ready that didnt require any extra hardware installed (I think) just fw updates to customers routers (or was it customers needed new routers but PCP equipment didnt change?? cant remember)