The file is typically uploaded to the Cisco Unified Communications Manager (CUCM) TFTP server or applied via the device's web interface, depending on your deployment mode.
This is almost certainly vendor-specific embedded firmware . dx80.ce8.2.0-syn213b.rel.pkg
It is functionally identical to version 213, but the 213B update ensures the conversion logic itself is safe to use. Implementation Guide The file is typically uploaded to the Cisco
Given its structure and naming conventions, dx80.ce8.2.0-syn213b.rel.pkg might serve one or more of the following purposes: dx80.ce8.2.0-syn213b.rel.pkg