Access the phone's web interface (if enabled) to see exactly which file is failing to download. Verify MAC Address:
The following guide explains why this happens and how to "repack" or configure your TFTP server to move past this screen. The Role of XMLDefault.cnf.xml cisco ip phone downloading xmldefault cnf xml repack
You should see a confirmation like "Transfer successful: 7332 bytes in 1 second, 7332 bytes/s". Access the phone's web interface (if enabled) to
Improved, explicit variants (choose one based on intent): 7332 bytes/s". Improved
: The phone requests its unique configuration file based on its MAC address (e.g., SEP001122334455.cnf.xml ).
If you want to troubleshoot a specific deployment, let me know:
For further reading, review Cisco’s official documentation on “TFTP File Management” and “Phone Configuration File Processing” for your specific CUCM version.