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.
Technical Tips Conventions for more information on document
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
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