We're experiencing issues with the CP-7861/8800 operator phones with expansion modules. The operator receives incoming calls minimum of 5 to 6, every minutes. When they're on an active call and attempt to transfer, the notifications for incoming call...

Dear All,I have a question regarding the design of our expressway cluster. Currently, we have a cluster for MRA that consists of two pairs of Expressway-C and Expressway-E. We are considering adding one more pair of Expressway-C and Expressway-E to e...

Dear All,After a crash during the upgrade from CUCM 12.0 to 12.5(SU8), the Publisher needs rebuilding. The backup TAR file isn't detected in DRS for restoration, so a temporary export file was used. Currently, phones are registered to the Subscriber....

Dear Team,I'd like to discuss two scenarios and seek suggestions on how we can smoothly upgrade or migrate to CUCM 15, considering that most deployments have an 80GB disk.Upgrading from CUCM 12.X to 15:Initial steps involve upgrading to version 14, f...