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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here
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To: Frank A. Coluccio who wrote (9982)12/31/2000 1:19:17 AM
From: Bernard Levy  Read Replies (1) of 12823
 
Hi Frank:

Using the copper cable model in Chen's DSL book,
I get that electrons travel at 210,000 km/sec
over standard copper cables (the speed of light
is 300,000 km/sec). This speed does not change
much over 22 gauge, 24 gauge or 26 gauge copper.
My guess is that the speeds of propagation of
pulses over copper or fiber are comparable.
Of course, the main difference is that copper
has much more attenuation particularly at
large frequencies, and thus a lower capacity.

Best regards,

Bernard Levy
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