My apologies. A colleague informed me that I was a dumb *** ;-) I neglected to pay close enough attention to the question. Actually, you can mix voice and data applications. Depends on what is on the other end. Here is a Q&A link:
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.