I currently have a CallManager 4.1(2) sr1 system implelemted at my company. Are there any reasons NOT to upgrade to the Call Manager 5.x series? I spoke with the original vendor of the system, but they didn't seem to have an answer other than "we haven't done it".
Do you have a good reason to upgrade to 5? If you absolutely require features that 4.1 does not provide than you should upgrade. Otherwise, I see no good reason to upgrade. (But I think appliance model is a way to go)
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.