This document describes how to troubleshoot phone firmware file installation failures on the Cisco Unified Communications Manager (CUCM) server.
When you attempt to install phone firmware files with a k3.cop.sgn (signed file) extension on the CUCM server, you encounter a file installation failure. The CUCM produces an output in order to indicate that the file is invalid, which appears similar to this:
The problem that is described in the previous section is encountered when you attempt to install these sample firmware files (or files with a k3 value) on the CUCM server Version 8.6.X or 9.X:
In order for the CUCM to support these firmware files, which are signed with k3 keys, it must already have the ciscocm.version3-keys.cop.sgn file installed on the CUCM server. If the CUCM server does not have this file installed, visit the Cisco Download Software page in order to obtain the most recent RSAv3 key Cisco Options Package (COP) file.
Based on the lab tests, these CUCM versions do not require this RSAv3 key COP file:
Once you have obtained and installed the ciscocm.version3-keys.cop.sgn file successfully on the CUCM server, the .k3.cop.sgn phone firmware file installation should proceed successfully: