dsl modem

[Ralph Doncaster]

On Fri, 17 Oct 2003, Justin Zygmont wrote:

> I just noticed on your web page, mr. president you mention that the
> nortel 1 Meg Modem is not ADSL, I was suprised to hear this.  I guess
> sympatico might have stopped using this type of modem for a while now,
> it's been years since I used it, can you explain what kind of protocol
> it really is?

In the broadest sense the 1MM is ADSL, but it's not standard ADSL.
Standard ADSL = G.992 AKA G.DMT (an ITU standard).  It uses discrete
multi-tone at layer1 and ATM at layer2.  The nortel 1MM uses CAP at layer1
and (I believe) ethernet at layer2.

-Ralph

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