Encrypted Phones SIP 7911, 7931, 7962, 7975 at CUCM 8.6.2 have access long time to the corporate directory and - works fine.
Today I add 7821 SIP Phones and they works works fine, but no access to corporate directory message "host not found" appears. Works also not with non sip secure profile.
The config is the same as the other phones, nothing different. Get the same IP Address Range, same DNS, same TFTP Server etc.........
The Cluster have 3 Servers, First PUB1, SUB1 and SUB2. The Phones are register at SUB1. For me it seems may be there is a problem with the TVS Certification.
But how could I fix this?
Please see attached Trace from the Phone.
I hope the Community could help me to solve the issue.
Really thanks in advance.
HTH, please rate all useful posts and right answers.