phone display message "Phone not registered" every 30 seconds.

[jose angel morales]

working with cucm 9.1 with demo licenses I have registered phones 8945
which may be the error and possible solution for this type of error?

[Manish Gogna]

Hi,

For phone registration issues it would be nice if you can get a parallel set of captures from the IP phone and CUCM to which the phone is registered. This will show if any packet / signaling loss is happening between the two. Besides this you can check the console logs from the 8945 and also look for any hardware related issues by changing the switchport or the ethernet cable.

HTH

Manish
 

[Tommer Catlin]

If your phone is dropping registration, you are having a problem with the network.   If you are running this CUCM on VMware and the host is running slow, it could be dropping packets and causing the SIP endpoint to lose registration.   A simple test is to run a ping test off the CLI from the CUCM Publisher or Subscriber the phone is registered or was registered to.  If you are dropping packets....  that is why.