said by Stealthwave :

With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area ... ...

I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other

said by EMC_guy :

You are contradicting yourself?

Anyway the old Motorola Canopy 900Mhz system has no RF magic inside. Rather they use BFSK modulation which has lowest signal-to-noise requirement but also lowest data rate and most inefficient use of spectrum of all modulations. However they use a more efficient MAC than 802.11 since it was designed for fixed-wireless deployments rather than wireless LANs.