In article <bmthkb$kk5$02$(E-Mail Removed)>,
(E-Mail Removed) says...
> Reasonable distance is between 5km and 10km. We will build tall poles
> stretching into the sky, so we will have line of sight. A few trees may be
> tall enough to come in the way of the signal, but not many.
"Tall poles" should help, but you must be certain that they are stable
enough to not move (and thereby change the alignment of your directional
antennas) under wind loading. Yes, you will want to use directional
antennas. 24dbi parabolics would be a good choice.
How tall will these poles be? Of what material will they be?
"A few trees" may be all it takes to prevent success. Get a topo map of
the proposed path and do a little surveying. Knowing in advance what is
(or is not) in your proposed signal path might save a lot of grief and
expense.
Assuming your survey indicates that you will have a clear signal path,
the next thing to do is an RF survey. A laptop, netstumbler, and a
directional antenna should be adequate to identify any big interference
problems. The unlicensed spectrum is getting crowded in many areas, so
you'll want to make sure that there's room for you to do what you want
to do.
When the survey's and site engineering (antenna masts, etc.) are done,
you'll probably have learned all you need to know in order to make a
good choice for hardware.
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