On Wed, Jan 24, 2001 at 09:22:11AM +1100, Michael Still wrote:
> Surely that's like saying I can't plug 2 56k modems into a phone
> connection and have it go.
Well, you can't. At least they might as well not be 56k modems,
because they basically have to fall back to 33k or so with
V.34-ish modulation.
The whole V.90/VFAST 56k thing _only_ works because the
"upstream" end has a special (digital) connection to the
telephone exchange.
ADSL is, in some half-hearted sense, more of that.
> I'm not saying you wouldn't have to place a
> phone call, but can you get an ADSL-like modem that dials and then runs at
> most excellent speeds?
There are HDSL/SDSL modems that are used for point-to-point
links like that, but mostly if you have to make a phone call,
then you are being switched in the digital domain at 64k
bits/sec, and that's all there is to it. There aren't any
analog exchanges in Australia any more.
--
Andrew
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