IP Telephony: Upgrading CallManager 3.3(4) to CUCM 5.1(3)
Hi experts, i have a client with running with CallManager 3.3(4) version and they bought two new servers 7835-H2 and need to migrate the data in the existing 3.3(4) server to the new ones.
If someone could please tell me the best way to perform this task, as i have tried installing the new server with the 3.3(4) Version and sucessfully uploading the database via BARS to the new servers, and then tried (in two different ocassions) to upgrade to the version 3.3(5) and 4.1(3) but somehow all the device pools, all phones, are missing.
I really appreciate for the information regarding to do this whole procedure.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...