Hi, 1. All Phones or Some model?2. Which Phone model you have this logs?3. Cluster type Non-Secure or Mixed?4. Upgraded CUCM exact version5. If possible can you please collect Packet Capture from IP Phone & TFTP Node (Primary in Network VLAN configur...

Hi This post will be helpfull to you to collect Network debug & tcpdump https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/213360-collect-expressway-vcs-diagnostic-log-fo.html And use cway.cisco.com/csa -> Log Analyser (Uplo...

Hi In your CUCM-CMS Trunk Profile you can apply SIP normalization script to modify the Calling URI Check the below for reference https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/213516-confi...