Only one phone with mode 7942 and phone load SCCP42.8-4-1S reboots periodically.
CUCM version is 6.0
Below is the application logs and the cause code is 12.
Line 4278: Mar 5 12:53:32, COMtpMUSalpdc01, Error, Cisco Call Manager, ccm: 4603: Mar 05 17:53:32.348 UTC : %CCM_CALLMANAGER-CALLMANAGER-3-DeviceUnregistered: Device unregistered. Device name.:SEP0021A02CE24C Device IP address.:184.108.40.206 Protocol.:SCCP Device type. [Optional]:434 Device description [Optional].:Hanson Kevin(213030416) Reason Code [Optional].:12 Cluster ID:AtlantaBillingsCluster Node ID:COMtpMUSalpdc01, 4277
Interesting thing is that MaxEventsAllowed is already set to zero for both subscriber and publisher.
We tried changing the phone,cable and switch port.
Other phones are working fine on the same switches.
Please help me how to proceed.