I recently read somewhere (unofficial) that BTOR have started resetting DSLAMS to deliver stability rather than speed (possibly due to increased take-up increasing 'noise interference' / crosstalk), thus resulting in lower attainable rates.
My own connection's DS SNRM dropped suddenly by 3dB or so 31st December & for a few days my sync speed remained the same.
Eventually it resynced back at the usual 6dB SNRM, but sync speeds reduced by almost 4Mb.
DS Attainable rate has also reduced by around 2Mb or so when SNRM is at 6dB.
My DS sync speed is now down to around 25.72Mb, whereas it had remained at just below 30Mb for many months prior to 31st December
My connection is very steady, but attainable rate & sync speed show no signs of improvement, so there MAY just be some truth in what I read.
Edited by Bald_Eagle1 (Mon 11-Mar-13 20:06:31)