Actually, Motorola's Canopy stole many of its ideas from a little known outfit in Georgia called Cirronet. They then mixed in a few ideas from the TDM cellular world. Overall, they tried to design the system to be the "meanest SOB in the Valley" when it came to the unlicensed bands. Canopy steps on everything, is courteous to nothing, and tries to take over every last shred of any band it's on. What's more, Motorola has lobbied to take spectrum away from WISPs. So, our company will not use anything they make. (We don't want to fund anyone who tries to take away the few bits of spectrum we currently have.)
But this is really not the place to discuss WISP equipment. Let's just say that standards-based WISPs have big advantages, because they're not tied to one manufacturer (who can raise their costs through the roof at will).