From: Niall O Broin (niall at domain linux.ie)
Date: Wed 22 Aug 2001 - 22:18:19 IST
On Tue, Aug 21, 2001 at 03:51:02PM +0100, Declan de Lacy Murphy wrote:
> We will be using 11 megabit cards. (roughly 1 megabyte) The actual transfer
> rate will depend on factors including distance, weather conditions etc. We
> are expecting that over the 1 mile range for all the people allready
> involved that we should get about half of the 11 Mbits. Were you using the
> inbuilt aerial on the buffallo cards. We definately will not be using the
> inbuilt aerials as I understand that they only designed for line of sight
> over a few metres. We are planning to run cables to the roof where we will
> mount proper aerials. The model we are looking at is only 20 inches long but
> gives 9dBi, although we might end up using directional antennas with double
> or triple that output.
The whole reason this is possible is that the built-in cards are NOT
designed for line of sight - they have omni-durectional antennae which will
work in buildings up to 100M through walls etc. If you then use the same
equipment but with high gain directional aerials you can get huge
improvements in range. Well known tech. writer Robert Cringely has done this
with a Yagi antenna to piggyback on somebody else's DSL connection (which he
paid for - he lived too far from the exchange to get DSL himself). I don't
have the URL but I'm sure Google will find it for you in a jiffy.
> We will probably at some point get in a leased line for internet connection
> and share it across the network.
This is where it gets interesting, of course. Has anyone considered the
legal/regulatory aspects of this ? Rest assured, big brother isn't watching
(at least not through my eyes) but he might be :-)
Niall
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