The IP phone does not register and user receives the "File not found" error message in Cisco CallManager

[TCC_2]

Core Issue

The error often occurs if the load is not present on the TPTP server or if the IP phone is unable to contact the TFTP server.

Resolution

For workaround for this issue, perform these steps:

1. Verify the load on the TFTP server. Refer to the Checking the Load on TFTP Server section of Cisco IP Phone 7971G-GE Release Notes for Firmware Release 6.0(2) SR2 for Cisco CallManager 3.3 or Later for verification.    
   
2. On the Cisco CallManager Admin page, select Service > Service Parameters > TFTP Service. Click the Advanced button. Verify that the IP address provided here is pointing towards correct TFTP IP address.Refer to Service Parameters Configuration for more information.    
   
3. On the Cisco CallManager Admin page, select Service > Service Parameters > CallManager Service > Enable Caching of Configuration Files. Set this parameter to False.Refer to Service Parameters Configuration for more information.    
   
4. Restart the TFTP service.

For more information, refer to the Correcting Phone Registration Problems section of Cisco IP Phone 7971G-GE Release Notes for Firmware Release 6.0(2) SR2 for Cisco CallManager 3.3 or Later.