I was with TT on ADSLMax and sync at 5Mb on 34db Attenuation. I often had, peak time only, similar issue where browser would spin and not connect to website. Had to back arrow browser and retry.
Found router never disconnected. However peaktime download speedtest dropped below 0.5mb sometimes.
Would not Upgrade me to ADSL2, moved to new ISP not had any problem since, sync at 12mb with no change to set up. Downloading at 10mb+
Maybe red herring, but can ISP deliberately restrict customer on Unlimited.
Edited by flippery (Thu 23-Aug-12 21:46:31)