1. Backup your data including configuration before firmware upgrade is recommended.
2. For UCM6xxx on 1.0.15.x, please upgrade to 22.214.171.124 directly.
3. For UCM6xxx on firmware earlier than 1.0.15.x, please upgrade to 126.96.36.199 first, then upgrade to 188.8.131.52. To upgrade to 184.108.40.206, please check 220.127.116.11 release note “Important Upgrading Note” section and follow the instructions.
4. It is recommended to upgrade UCM to latest firmware for product lifespan and security improvements.