I have not tried a computer (doh!). Good idea.
i made the ends very carefully using the B standard, but don't have a tester for them so its possible that i messed them up. any free way to test the ends?
my isp said that the 330 feet is a max distance only in theory and that to get 250 feet to work you would have to have perfect cable with no kinks or twists (stress on the lines I suppose). he said there is some kind of booster i can get but didn't elaborate. would splicing in a powered switch in the middle of the run help?
A switch along the way might help. But try just a PC/laptop at the far end first.