1. ALWAYS create a backup of your configuration and data before a firmware upgrade.
2. If downgrading from firmware version 22.214.171.124+ to 126.96.36.199 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 188.8.131.52+ to a UCM on 184.108.40.206 or lower may cause abnormal system behavior.
3. For UCM6xxx on firmware earlier than 1.0.20.x, please upgrade to 220.127.116.11 first, then upgrade to 1.0.20.x. To upgrade to 18.104.22.168, please check 22.214.171.124 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 126.96.36.199: Firmware File
UCM62xx 188.8.131.52: Firmware File
UCM62xx 184.108.40.206: Firmware File