/mcpprotocol error. Collect existing SDI and SDL traces and contact the Cisco Technical Assistance Center (TAC). 27 CapabilityResponseTimeout - (SCCP only) Unified CM timed out while waiting for the device to respond to a request to report its media capabilities. Possible causes include device power outage, network power outage, network configuration error, network delay, packet drops, and packet corruption. It is also possible to get this error if the Unified CM node is experiencing high CPU usage. Verify that the device is powered up and operating, verify that network connectivity exists 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). 28 SecurityMismatch - Unified CM detected a mismatch in the security settings of the device and/or Unified CM. This alarm can occur due to any of the following situations: The device established a secure connection yet reported that it does not have the ability to do authenticated signaling; the device did not establish a secure connection but the security mode configured for the device indicates that it should have done so; or the device established a secure connection but the security mode configured for the device indicates that it should not have done so. To correct the error, ensure that the 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 180/343