/mcpexperiencing high CPU usage. Verify that the device is powered up and operating, verify network connectivity between the device and Unified CM, and verify that the CPU utilization is in the safe range (you can monitor this via the CPU Pegging Alert in RTMT). 7 InitializationError - An internal error occurred within Unified CM while processing the device registration. Cisco recommends that you restart the Cisco CallManager service. If this issue occurs repeatedly, collect SDL/SDI detailed traces with "Enable SIP Keep Alive (REGISTER Refresh) Trace" and "Enable SCCP Keep Alive Trace" under Cisco CallManager services turned on and contact the Cisco Technical Assistance Center (TAC). 10 AuthenticationError - The device failed either TLS or SIP digest security authentication. If the device is a SIP phone and is enabled for digest authentication (System > Security Profile > Phone Security Profile, check whether the Enable Digest Authentication checkbox is checked), verify that the Digest Credentials field in the End User Configuration page is configured. Also, check the Phone Configuration page to determine whether the phone is associated with the specified end user in the Digest User drop-down list box. If the device is a third-party SIP device, verify that the digest credentials configured on the phone match the Digest 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 175/343