[40673] in North American Network Operators' Group
Re: wanted: wireless magic tricks
daemon@ATHENA.MIT.EDU (M. David Leonard)
Thu Aug 16 13:12:11 2001
Date: Thu, 16 Aug 2001 13:06:38 -0400 (EDT)
From: "M. David Leonard" <mdl@equinox.shaysnet.com>
To: Leo Bicknell <bicknell@ufp.org>
Cc: "'nanog@merit.edu'" <nanog@merit.edu>
In-Reply-To: <20010816125127.A95509@ussenterprise.ufp.org>
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I believe there are limitations on antenna gain and total EIRP in
those frequency bands which would make it difficult - if not impossible -
to get any kind of link budget over that distance. I could be wrong, but
that's my reading of 47 CFR Part 247(I think that's the correct citation).
David Leonard
ShaysNet
On Thu, 16 Aug 2001, Leo Bicknell wrote:
>
> On Thu, Aug 16, 2001 at 11:01:54AM -0500, Cerqua, Toby wrote:
> > client needs 45Mbps pushed over 20 miles... and he wants it wireless. the
> > kicker is that they don't want a T3 because it is "too expensive" and it
> > would take too long to get installed. it doesn't need to be constant, but he
> > wants to move of 2.5GB within 45 minutes. this is in the chicago area, if
> > that helps any. so, i don't know, satellite?
>
> 802.11a might do what you need. Not sure if it has been standardized
> yet, but if not there are a number of proprietary implementations
> in the same speed range. It promises 50Mbps with similar properties
> to 802.11b.
>
> 20 miles is going to be a long throw, but not outside the range of
> possibilities if you have line of site and good rooftop acesss. You
> will need some big antennas though. A site in the middle making it
> 2 10 meg shots would be ideal.
>
> --
> Leo Bicknell - bicknell@ufp.org
> Systems Engineer - Internetworking Engineer - CCIE 3440
> Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org
>
