Agents need to manually start IP Communicator. If the agent logs into Agent Desktop, and IP Communicator has not been started-that is, the device is not in service and registered with Unified CM -the agent may see the following error: "CTI Warning: The request failed because a timeout limit was exceeded".
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.