> > Circuit Cellar has adds for a 900MHz RF modem with a 40 mile range. You
> > should look into those.
>
>         Somehow I doubt a device capable of covering 40 miles can be used
> without a
>license of some sort. TTYL

I went and looked it up.  I do not believe that it requires a license.  The
900MHz band is an unlicensed band, and the specified output on these
devices is 100mW.  I bet your cordless phone is higher power than
that.  The receive sensitivity is -116dBm on the 900MHz model

The website is www.maxstream.net

--Brendan

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