Learn more here: http://www.motorolasolutions.com/en_us/products/project-25-systems/astro-25-tdma.html Add Capacity and Be Prepare for the Unexpected with TDMA Improve efficiency and prepare for the unexpected with your existing hardware and radio frequencies. P25 Phase 2 compliant, ASTRO 25 TDMA can double your communication capacity and help you prepare for upticks in demand brought about unexpected events.