In article <41407600E48AD211893F0040053FEA77011811(at)MAIL>,
Jarrid Gross <JGross(at)econolite.com> wrote:
> Jerome wrote,
>
>
> >Copper pairs (telephone line) can only handle 30kbps.
>
> Not quite true.
Right, that's an analog limitation.
> Using some trick new technology, the phone company can get you
> quite a bit higher kbps (ADSL/DSL), but of course, much like ISDN,
> you will need a new modem.
That's because they switch you off copper ASAP at the switch, thus
the Digital Subscriber Line (DSL), a parallel digital-only (fiber)
network.
> Copper lines that go through much of the tel co's equipment have
> lousy bandwidth, and noise, which at best limit the phase coherancy in
> the modulation detection of the modem signal, which makes analog
> links above 56K impossible, and links above 33K very persnickety
> about line quality.
It's usually not the copper, per se, but the interconnects, and
amplifiers that do digital-analog-digital conversions along the way.
Also, as a note to the "xDSL is better than cable" marketing you may
see, xDSL speed is distance-dependent, so only those folks nearest to
the head-end of the DSL trunk get the advertised speed.
--- J e r o m e Y u z y k | jerome(at)supernet.ab.ca - - BRIDGE Scientific Services | www.tgx.com/bridge - - Sunbeam Alpine Series II #9118636 | www.tgx.com/bridge/sunbeam - - I went to SUNI III... Did You? | www.newsource.net/suni3 -
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