On Aug 17, 2006, at 11:08 PM, R.D.Preston wondered: > I have a Mac Mini with an internal modem @ 56k bps., and see a > common connect-up @ 52k bps. Usually, the d/l speed is from 4kb > to 6kb per second, as expected. However, on occasion I observe > the d/l speed to be as high as 15kb to 17kb per second. > What allows this to happen?
I'm not certain, but I suspect it's how much the data can be compressed when it's sent down the line. Your modem probably uses v. 42bis or v.44 compression to squeeze more bits into a second. If the stuff you're downloading can be better compressed, then your bps count is increased. For example, text files will always compress better than mp3 or jpeg files because the latter are already compressed, so the apparent bps on text will nearly always beat bps on jpeg. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.math.louisville.edu/pipermail/macgroup/attachments/20060818/6b229243/attachment.html -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2452 bytes Desc: not available Url : http://www.math.louisville.edu/pipermail/macgroup/attachments/20060818/6b229243/attachment.bin
