** You will be asked to name the MCS machine during the OS install, be sure you name it accordingly if you plan to later put it on the production network, because this netbios name cannot be changed without a complete re-installtion.
2. Configure your Call Manager to allow the IP phones to register, receive Directory Numbers, and call each other.
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.