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Article #182

Re: ADSL and Demon

#182
From: David Hall
Date: Tue, 27 Jun 2000 00:00
33 lines
2397 bytes
Simon Dobbs wrote:
>
> > ADSL is provided over copper wires. Only BT has copper wires going to
> > your house, and it's going to stay that way until they unbundle the
> > local loop. I don't actually know what that means, but people seem to be
> > saying it a lot in this context so I thought I'd better do likewise.
> > Other telephone operators use optical fibres. Instead of ADSL, you can
> > get cable modems from them.

Strictly speaking all you need is a direct connection between you
and your ISP. The phone co. just provides that connection and
removes that line from the 'exchange' (router) part of the exchange.
The DSL modems can drive lots of data down a wire (but less the
longer the wire), but put it through an exchange that chops
everything down to 64kpbs to multiplex into the trunk routes
tends to put an upper limit on normal phone lines.

For further info:-
http://www.odessaoffice.com/sdsl.htm
http://slashdot.org/articles/00/04/03/2147239.shtml

> 
> don't ntl have copper wires going to my house? My phone connection doesn't
> seem to be anything special until it gets to the box at the end of the road,
> which presumably converts to fibre optic.

I suspect that all the ntl works with wires (co-axial cables)
since they can carry an enormous amount of data. Even from the
box at the end of the street.

Cheers

David
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From: David Hall <David.Hall@scisys.co.uk>
Subject: Re: ADSL and Demon
Date: 2000/06/27
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