said by en102 
:I _really_ don't think anyone's using omnidirectional for data communications. Its a waste of spectrum.
The main reason for trimming to a few miles vs. ~30miles is capacity. How many users can use WiMAX in any given area can use it, if you're going to spread a 70MHz beam over 30 miles, even in one sector. Backhauling is different direct point-to-point, with a narrow area would obviously give a much longer range.
Poor choice of words on my part. The 30 miles is for point-to-point is what I was getting at.
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