I've uploaded the Tar file for Cisco IP phone 8831, as our current Call Manager doesn't have this phone type.
I have completed this before a time or two, but it's been a long time, so I was hoping to be refreshed on the steps to be taken once the TAR file has been uploaded & the TFTP service restarted on each CM in the Cluster.
Cisco is telling me that a complete device pack upgrade needs to be installed on all servers to revise the firmware for all our endpoints. I know I have completed this before for a single device. I'm unable to get clarity on exactly why I need to install an entire device pack (after hours) and disrupt all my phones, just because I want to install the 8831 & get it working. Does anyone know if this info is accurate or may I proceed with the TAR file for 8831?
Our cluster has (1) Publisher & (2) Subscribers. All are CUCM running Software Version: 8.5.1.15900-4
Any info provided will be much appreciated!!