Question : Cisco Call Manager message loop

My CME router CLI is filled with messages the ephone 5 registers and then unregisters in a loop.Please advise.

18:23.918: %IPPHONE-6-UNREGISTER_ABNORMAL: ephone-5:CUC1-VI1 IP:192.168.0.20 Socket:5 DeviceType:Phone has unregistered abnormally.
18:23.918: %IPPHONE-6-REGISTER_NEW: ephone-5:CUC1-VI1 IP:192.168.0.20 Socket:1 DeviceType:App has registered.

Answer : Cisco Call Manager message loop

This may be a problem with the switch port.  What kind of switch do you have the phone connected to?  Try changing the switch port this phone is connected to and see if the errors continue.

Hope this helps.