NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Google Books
From: Bill B
Date: 2007 May 29, 14:43 -0400
From: Bill B
Date: 2007 May 29, 14:43 -0400
> From: "George Huxtable"> My own dialup line normally gives a speed of 50.6 kb. However, these are > kilobaud, or kilobits per second, not kilobytes/sec. To achieve the transfer > time that Frank quotes, of 37.5 Megabytes in 15 minutes, a rate of 40 > kilobytes per second would be called for. Perhaps such speeds are indeed > available on US dialup lines, but somehow I doubt it. Certainly not here in > the UK, though. > > To download the file he refers to would take me over 2 hours, not 15 > minutes. I think George's estimate is closer to the truth, and that assumes an ISP or server does not "time-out" the session (cut you off) during such a long download. While there are schemes to enhance the speed of dial up connections, the facts remain. A 56 modem will not achieve that speed as there is (was?) a speed limit over phone lines of approx. 43,000 bits a second in the USA. Divided by 8 bits per byte, and 1024 bytes per kilobyte, the result a bit over 5KB per second. In practice, 4.0-4.5 KB per second is about my norm for actual *content* download. Which equates to over 2 hours for a 37.5 MB file. Bill --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---