On Individual devices, it would show its own name but during the point to point call - It will show only IP address as Gatekeeper is the device which faciliates the conversion of IP address into alias/E164# /H323 ID etc.
So, if you dont have Gatekeeper - I Dont think you would be able to see system name on the machines.
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.