1. ALWAYS create a backup of your configuration and data before a firmware upgrade.
2. If downgrading from firmware version 220.127.116.11+ to 18.104.22.168 or lower, users must factory reset the UCM and restore a backup created on the corresponding lower version to minimize potential issues from the downgrade. Please note that restoring a backup created on 22.214.171.124+ to a UCM on 126.96.36.199 or lower may cause abnormal system behavior.
3. For UCM6xxx on firmware earlier than 1.0.20.x, please upgrade to 188.8.131.52 first, then upgrade to 1.0.20.x. 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.
Download UCM62xx Firmware Files:
Previous UCM62xx Firmware:
UCM62xx 18.104.22.168: Firmware File
UCM62xx 22.214.171.124: Firmware File
UCM62xx 126.96.36.199: Firmware File