- CUCM Version 9.1.2.
- Newly deployed Cisco 7821 phones in cluster
- facing issue with registration, showing UNKNOWN for some of the phones
- if I reset the registered phone taking 30 min to register again
- even if i update the Line page, its taking 30 mins to register
- TFTP is not responding to the phone request for the file j9-tzdata.jar.sgn
- Any idea regarding this issue
