If you use the show call resource voice stats command you will get a snapshot of what is in use right now. I have not found a command that will give you a calls per second history. We have implemented an rsh to the gateway where we regurlary run a command to see what is in use and record this over time to determine the load and thus can do Erlang-B calculations on the channel usage. If you find a better way I'd too like to know.
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.