🚀 go-pugleaf

phil henry wrote:
> 
> On Fri, 21 Feb 1997 09:35:14 +0000, Stuart Carmichael
> <stuartc@europe.shiva.com> wrote:
> 
> >phil henry wrote:
> >>
> >> On Thu, 20 Feb 1997 19:24:41 GMT, Peter@adelheid.demon.co.uk (Peter G.
> >> Strangman) wrote:
> >>
> >> >On Thu, 20 Feb 1997 14:43:23 GMT, phil.henry@telcore.demon.co.uk (phil
> >> >henry) wrote:
> >> >
> >> >> An aside: xDSL technologies can put 2-8Mb/s down copper.
> >> >>
> >> >> However, cable modems won't be on the end of copper.
> >> >
> >> >Eh? What will they be on then?
> >>
> >> Not copper pairs. I believe they will use coax although fibre is
> >> possible.
> >>
> >> --
> >> ________________________________________________________
> >> phil henry ...
> >
> >The whole point of ADSL is that it does use the existing copper
> >pairs that the telcos have already installed.  This means that
> >to roll out ADSL they don't have to relay all the cables to your
> >home, just stick an ADSL modem on each end of the cable (one in
> >your home and one in the local exchange).  The other thing to note
> >is that it is Aysmetric, i.e ~6Meg down stream (depending on
> >cable quality/length) for all those lovely web pages and 640k
> >upstream for control information.
> >
> >if you want more info on this check out
> >http://www.adsl.com/adsl_tutorial.html
> 
> The main topic was cable operators and cable modems.
> 
> However, there seems to be little news of ADSL work
> in the UK. I believe a number of US telcos are trialling
> ADSL and US West (?) and SBC are rolling it out this year.
> As ever, 'telecomms words' are full of dreams, or
> marketing hype.
> 
> I believe ADSL is posing all kinds of problems for telcos
> related to cost, wrong kind of pairs already deployed,
> network management, business processes,
> network archtitecture,  accommodation etc.
> 
> --
> ________________________________________________________
> phil henry ...

I read somewhere that ADSL will also be virtually impossible in the UK
until BT allows people access to its cables to put the ADSL signal onto
the line (as I understand it ADSL stuff is added onto the line before
the POT exchange gets hold of it, and so the ADSL signal doesn't
penetrate the old LOT exchange.

-- 
Andrew J. Pattison
app@dcs.ed.ac.uk
WWW: www.ed.ac.uk/~app