[MLB-WIRELESS] Re: Microwave links (fwd)

Michael Nardella michael at nardella.com.au
Tue Sep 3 00:44:35 EST 2002


Yeah, and I like how it's "just under 4w eirp"

Michael

-----Original Message-----
From: owner-melbwireless at wireless.org.au
[mailto:owner-melbwireless at wireless.org.au]On Behalf Of sanbar
Sent: Tuesday, 3 September 2002 12:04 AM
To: melbwireless at wireless.org.au
Subject: [MLB-WIRELESS] Re: Microwave links (fwd)


Is this claim right?
It's from another mailing list ... bit at the bottom too about a 30km
link.
- Barry

--
barry park
http://wireless.bur.st/ ||| community wireless project
http://wireless.org.au/ ||| melbourne wireless node bca
-=all your http_get are belong to us=-

---------- Forwarded message ----------
Date: Mon, 02 Sep 2002 20:51:34 +0800
Subject: Re: Microwave links

Microwave links would only interfeer with eachother if they are running
on the same freqency(channel). with 802.11b, you have 11 channels to chose
from. Only 3 of these are truly individual due to the overlap. Ch 1, 6 and
11.
However, on ch 11, if you output 4W EIRP(legal limit) you are actually
putting out more power than is legal due to the overlap into ch 12+ which
AFAIK
isn't legal to transmit on.

Speaking of microwave links, we have just established a link that stretches
just
under 30km here in WA. It goes from the 'HillsHub' to a site i manage
(DVNet) in
Doubleview. presently we are having a few small problems due to a firmware
on the
card at HillsHub, but other than that, we have a very usable link (at
5.5Mbit)
This is using an 18dBi Galaxy dish and a 35mW Cabletron card at HH, and a
Cisco 352 series
card (100mW) and a 24dBi Galaxy dish at DVNet(with a long cable run, so its
just under 4W EIRP).



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