Barry -

Depending on the path, you might want to look into some of the ISM
(Industrial, Scientific, Monitoring(?) (it's late!)) Part 15 devices. These 
don't require a license, and the cost is less than a cell modem.  

Actually - let me think about this a bit - I need to do some
back-of-the-envelope calculations about data rates, radio costs,
and so on.  The real problem with using cell modem is the on-air
cost, along with very low data rates. 

Tom G.

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