fataldata

So I have a little disagreement with my Special Services tech.

Is DSL analog or digital? I realize that by the name it is digital. My point is that since it is over copper I assume it uses a frequency to carry data. Frequency is an analog characteristic not a digital one. The only way I could see a digital circuit on copper would be if it were simple DC current. Can anyone shed some light on this subject for me. Or tell me where I can read more.
TIA

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Systems In Use:
S8700 CM3.0 and S8710 CM3.1.1

Cephas

You're kind of splitting hairs here a bit. I would say you are both right. DSL modulates digital data onto an analog carrier in the same way a regular modem does (or specifically the DSL modems modulate and demodulate the digital data). Of course, you could say the exact same thing about T1 (data or voice) and ISDN PRI. Your pairgain unit is, at it's most basic level, a very very very fast modem. Way down at layer 1 the only thing that is truly digital is fiber.

But, in the end, who really cares? Analog has come to mean slow, and digital has come to mean fast, regardless of whether those terms are always 100% correct or not.

Cephas

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