I am facing issue with registration of Cisco 3951 SIP Phone. Earlier it was registered with CCM and working fine, but currentky it got unregistered. Whenever i reboot the phone it is registered for some time and then again automatically gets unregistered in a short span of time.
I have tried below mentioned steps to troubleshoot the issue:
1.Reboot the phone.
2.Changing of switchport.
3.Deleted from CUCM and and tried to register it again...
But every time its registerd for some time and again get unregistered..
CAn any one tell me what can be the issue??