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To: Jing Qian who wrote (4325)	1/16/1999 3:55:00 PM
From: E. Davies	Respond to of 29970

Bottom line on upload speeds is that it is highly dependant on line quality (for both Cable and xDSL) and network usage (for Cable) which is better is hard to say. I believe that currently @home limits the upstream speed (to 128k?) essentially to try to prevent users from high-volume site hosting. The following is taken from the @home site: home.com ADSL (the most commonly discussed potential implementation of xDSL) is asymmetric and can theoretically provide 8.448Mbps downstream and 640Kbps upstream. As ADSL's speed is dramatically reduced by distance attenuation, these figures only apply where the telephone local loop is 9,000 feet or less. With an 18,000-foot local loop, for example, ADSL's maximum speed is reduced to 1.544Mbps downstream and 16Kbps upstream. Also here is a nice site on the Motorola cable modem. Gives some decent technical view of what these things actually are mot.com Buried in that site I found the following comment on Motorolas DOCSIS Modem: The CyberSURFR Link receives 64/256 QAM signals from the Motorola CMTS supporting throughputs up to 40 Mbps and transmits QPSK/16 QAM signals upstream supporting throughputs up to 10 Mbps . mot.com Eric