Cisco IP Phones are getting unregistered from the Cisco Unified Communications Manager (CUCM) and the CUCM event log shows the Device unregistered error.
This document provides information about this error message.
There are no specific requirements for this document.
The information in this document is based on the Cisco Unified Communications Manager 5.x/6.x.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Refer to Cisco Technical Tips Conventions for more information on document conventions.
Cisco IP Phones are getting unregistered with the error code 12 and the CUCM event logs show this message:
%CCM_CALLMANAGER-CALLMANAGER-3-DeviceUnregistered: Device unregistered.
Device IP address.:x.x.x.x
Device type. [Optional]:8
Device description [Optional].:xyz
Reason Code [Optional].:12
The Reason Code 12 means SCCPDeviceThrottling, which implies that a Skinny device gets throttled (asked to shut down and reregister) when the total number of events that the Skinny device generated exceeds the configured maximum threshold value (default value: 2000 events) within a five second interval.
In Cisco Unified Communications Manager 5.x/6.x, go to Service > Service Parameters > CallManager and check the MaxEventsAllowed parameter.
This parameter indicates the maximum number of events that a Skinny Client Control Protocol (SCCP) device can generate within a five second period. If the device exceeds the specified maximum, Cisco CallManager throttles it, triggers the SkinnyDevicesThrottled counter in the Cisco CallManager System Performance object (which is viewable in Cisco CallManager Serviceability's Real-Time Monitoring Tool), and forces the device to reregister. Entering 0 for this parameter disables the SCCP device throttling.