[plug] OT: ADSL Exchanges (again)

[James Elliott]

I don't think that is right (see below).

The box on the estate can be viewed as a mini-exchange if you like.  It
doesn't matter what technology you use, the local loop (copper wire between
customer and exchange) can only ever carry up to 4000 Hz.  Think of it like
a freeway with 4000 vehicles passing a point in a given time.  If those
vehicles contain only one person your baud rate is 4000 bits per whatever;
but if they are 4000 ADSL buses each with 50 persons on board then the same
number of packets deliver 200,000 bits per whatever,  and if you put in a
second freeway (wire), you can double that again.  Mobile phones can only
send/receive 19,000 bps, but by using three channels (frequencies) this can
be boosted to 67K. Getting back to telephone wires, the shorter the distance
between user (copper wire) and the exchange (fibre) the better, so if R.I.M.
is as you say it is, I would say you have much more chance of getting ADSL
than someone who lives further away from an old fashioned exchange.


James Elliott
Ravensthorpe Computers
ABN 34 305 232 710
Tel:   08 9838 1043
Fax:  08 9838 1049
Cell:  0428 39 6052
E-mail:  James.Elliott at wn.com.au
Australia Post:
PO Box 228, Ravensthorpe WA 6346
----- Original Message -----
From: "Justin" <justin at inwa.com.au>
To: <plug at plug.linux.org.au>
Sent: Friday, June 21, 2002 8:33 AM
Subject: RE: [plug] OT: ADSL Exchanges (again)


> At 07:32 AM 21/06/2002 +0800, you wrote:
>  >What's a RIM, and how does it affect the Brooklands end of the world?
>  From my limited knowledge a R.I.M. is a way for Telstra to save money
when
> they setup small estates.
> Basically they chuck fibre from an exchange out to a box in your estate,
> then run the copper from there.
>
> Unfortunately ADSL needs copper all the way to the exchange, so if you are
> on a R.I.M. - you don't get ADSL.
>
> Someone correct me if i am wrong, otherwise HTH
>
> Justin
>
>