where are you?
i know that in the uk some bt lines split using the duplex system. great for bt in getting more customers onto their stuff without connecting a proper second line but in effect you only have half the bandwidth available.
if that sounds like it might be you then contact your isp and ask if they have set up a duplex line and insist they change it - you are paying for a second line not half of the one you already have.
trout are freshwater fish and have underwater weapons
trout are very valuable and immensely powerful
keep away from the trout