1. Backup your data including configuration before firmware upgrade is recommended.
2. For UCM62xx/UCM6510 on 1.0.19.x, please upgrade to 1.0.20.x directly.
3. For UCM62xx/UCM6510 on firmware earlier than 1.0.19.x, please upgrade to 1.0.19.x first, then upgrade to 1.0.20.x. To upgrade to 1.0.19.x, please check 1.0.19.x 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.