I have Cisco CUCM 6.1.2, earlier all phone was able to auto register but now it is not registering. I have tested 7940 , 7975 and soft phone.
<br />I have deleted one working phone from call manager after deleting it is stop working error on 7940 is "File not found"and on phone 7975 error is "DB error"
<br />Can someone help me and suggest where I need to check
If i am adding mannualy it is able to register with CUCM. and my address range is 1000-1999 and currently regiter phones are only 700.
Do a route plan report for unassigned DN's, and see if all of your auto-registration DN's appear there. If they do, delete them and try to get the phone to auto-register again.
Hope that helped, if so please rate.