Motorola added support for Talker Alias last September. This was later than most other manufacturers, Hytera was first. One must upgrade flash on all the equipment used to utilize it. Now that being said, the first generation of Mototrbo models (monochrome display) cannot be upgraded. The 5550 and 7550 series can be. I am not sure about repeaters but suspect the early models might not be capable of upgrade.