Re: Cable Modems (was Re: Telewest Communications FIASCO)

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Article #40

#40

From: Danny Thompson
Date: Sat, 22 Feb 1997 00:00

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On Thu, 20 Feb 1997 14:01:45 GMT, rcm@dcs.ed.ac.uk (Richard Morrell)
happened to mention:


>Speaking of cable modems and the like, I was wondering if anyone could explain
>something to me.  I have heard that the telewest cable network is not completely
>fibre optic (i.e. parts of it are made up of copper wire).  Now if parts of the
>network are made of copper, how do Telewest plan to offer faster access speeds than
>64kbps which is the theoretical maximum throughput on a copper wire?
>
Bzzzzzt!  What about 10BaseT Ethernet, that's 10Mbps.  Copper will
happily go to 100Mbps (TPDDI, 100BaseTX and FX etc.,) and engineers
are near completing Gigabit-per-second transmission speeds for
commercial use.  Distances can be a bit limited but for use
in-building it is no problem. BT have been delivering E1 (2Mbps) down
copper for over a decade!    Also, inevitably, a signal travelling
over fibre will eventually end up on copper (albeit of the plated on a
PCB variety).

Rgds

| Danny Thompson                                                  |
|              It's a Bird, innit!. It's a bloody sea bird......  |
|              .. it's not any bloody Flavour.   Albatross!       |
| http://www.bantam.demon.co.uk                                   |

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From: dat@bantam.demon.co.uk (Danny Thompson)
Subject: Re: Cable Modems (was Re: Telewest Communications FIASCO)
Date: 1997/02/22
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