Doubt about conference call between two CTS endpoints
Most likely you would get either a busy tone with an error message that says "Remote site is not compatible" or the call would connect audio only using the speakerphone of phone B.
In my experience this issue can be intermittant, because the call manager will ring both the phone and codec at the same time, and sometimes the codec will answer first and othertimes the phone answers first.
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.