If your radio has Front Panel Programming (FPP) (option Q52), upgrading to firmware versions newer than R09.00.00 without also having the Q53 option may cause you to lose FPP functionality.
A unique string defining the radio's enabled features. xts5000 firmware
As trunking controllers age, they are upgraded. Older firmware sometimes fails to handle channel grant messages from newer Motorola or third-party controllers (e.g., GTR 8000). Upgrading to R16.x resolves handshake failures. If your radio has Front Panel Programming (FPP)