zakj at xmission.com
Sun Jun 4 22:28:56 MDT 2006
This is obviously very off the original topic, but it is interesting stuff.
The fiber connection through Utopia or IProvo enters a modem-like box, but
what is it doing if not encoding/decoding the data?
Levi Pearson wrote:
> Hans is correct; a DSL modem is a modem. A cable modem is also a
> modem. Here's why: Modem stands for MODulate-DEModulate, and
> modulation is the process of changing the frequency, amplitude, and
> phase of an analog signal in order to encode a digital signal. Both
> DSL and Cable internet are digital information carried through an
> analog medium, so a modem is required on both ends. I believe ISDN,
> on the other hand, is transmitted digitally, as are most network
> protocols that go over twisted pair or fiber.
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