1. Backup your UCM62xx's data (including configuration) before upgrading is recommended.
2. For UCM62xx on 1.0.14.x, please upgrade to 184.108.40.206 directly.
3. For UCM62xx on firmware lower than 1.0.14.x, please follow the upgrading instructions in UCM62xx release note to upgrade to 220.127.116.11 first, then upgrade to 18.104.22.168.
4. After upgrading successfully, please clear cache or refresh your UCM web UI in your web browser before configuring UCM again.
5. This firmware has fixed a backup issue on firmware 22.214.171.124 which causes backup failure when CDR has lots of data. If you UCM is on 126.96.36.199 and cannot create backup file, please use a backup file from 1.0.14.x or contact Grandstream tech support for assistance.