"There are some issues in connecting between CME IP Phone and IP Phone g729a. You may have Voice distortion"
Again, my question is "can it be done and if so how?" The CME documentation does not address this configuration, but the post that you recommended that I read "clearly" indicates that someone has either done it, or has replied to my question "off-the-cuff," such as you have, and really does not have the answer. If there are truly "distortion" problems, I'll find out on my own. We can save everyone's time by just answering the original question. It's very easy, if you don't have the answer, don't comment.
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.