Cisco 8831 not registering with CUCM 10.5 (Internal Phone Error)

[shawn13872]

Running CUCM 10.5,  and just purchased a 8831 phone. The keypad is stuck with the Cisco Logo and CUCM shows the following " Inactive Load Failure Reason Internal Phone Error"

 Any ideas on how to resolve this issue:

[Deepak Rawat · Accepted solution]

Duplicate of:

https://supportforums.cisco.com/discussion/12989936/cisco-8831-not-registering-cucm-105-internal-phone-errorhttps://supportforums.cisco.com/discussion/12989936/cisco-8831-not-registering-cucm-105-internal-phone-error

Regards

Deepak

[Tristan Cober · Accepted solution]

The 8831 requires a stepped upgrade to get to 10-3-1 from 9-3-3. Please see this document for the procedure.