The Definitive Guide to Motorola XTS 5000 Firmware Updates and Management
: This is Motorola's proprietary methodology for upgrading features (like adding P25 Trunking or AES Encryption) and firmware. xts5000 firmware
(and minor sub-variants) are widely considered the final, most stable firmware versions released by Motorola before the radio reached end-of-support. The Definitive Guide to Motorola XTS 5000 Firmware