Cisco Unified Communications -- Problems During System Upgrades
This information applies to all Cisco Unified Communications System releases.
System-Level Upgrade Instructions
Uncertain about the order in which to upgrade the various components in a system solution? The recommended and tested sequences for upgrading system components are presented in separate System Installation and Upgrade Manuals for contact center and IP telephony applications. These manuals are available for each major and minor Unified Communications System release at
To determine the software versions for each Cisco Unified Communications component that were tested together during system-level testing, see the Unified Communications Compatibility Tool.
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