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If you want high quality video, it takes 5 megabits a second. This takes up 1.9 Gigabytes for an hour long video. Transferring it at 28.8 takes 144 hours. You get that hour in a week . So you get ISDN, big deal, why I can get the hour in a little over a day. If we had 1.5 Megabit T1 then we get it in 2.7 hours. None of those are satisfactory, of course.