/mcpdevice exceeds the number configured in that service parameter, Unified CM closes the TCP connection to the device; automatic reregistration generally follows. This action is an attempt to stop malicious attacks on Unified CM or to ward off excessive CPU usage. No action is required; the device will re-register automatically. 2 keepAliveTimeout - Unified CM did not receive a KeepAlive message from the device. 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 network connectivity between the device and Unified CM, and verify that CPU utilization is in the safe range (you can monitor this via the CPU Pegging Alert in RTMT). No action is required; the device will re-register automatically. 3 dbChangeNotify - An ApplyConfig command was issued from Unified CM Administration resulting in an unregistration. No action is required; the device will re- register automatically. 4 deviceRegistrationSuperceded