If you define each DS0 as it's own DSO group on the controller, you can set "precedence" on the POTS dial peer for each. Even though they use the same prefix, eg: "9", the outbound call will follow the order you define.
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.