TDMA (Time-Division Multiple Access) is a technology that allows fixed wireless equipment to scale beyond the abilities of standard fixed wireless protocols like WiFi, especially in outdoor environments. With the advent of MIMO (Multiple-Input Multiple-Output) and MU-MIMO technology, fixed wireless radio systems can scale beyond traditional TDD (Time Division Duplex) systems allowing WISP (Wireless Internet Service Providers) the ability to grow their wireless business to the next level.