You ask an excellent question, and one that will likely trigger a heated discussion. I've had interest in the same topic for several years, and surprisingly found very little online. Everyone makes a thick client. WebRTC is a development project which is making inroads toward thin client softphone functionality. It's an excellent concept, but I haven't seen a production-ready client, yet. (Not saying there aren't any; I just have not seen them.)
Then I came upon this info in the Cisco Unified Communications System 9.0 SRND:
Cisco Virtualization Experience Client (VXC) endpoints enable the end users to have secure real-time access to content and business applications as well as a rich collaborative user experience. These endpoints provide access to collaboration services that are part of the larger Cisco Virtualization Experience Infrastructure (VXI) solution. For information on a complete end-to-end VXI solution design, refer to the documentation available at
Cisco Virtualization Experience Clients (VXC) are endpoints in the Cisco Unified Communications portfolio; however, they are more than just simple endpoints because they interact with a user's working environment by providing voice, video, and virtual desktop capability and functionality. A user's work environment can assume various profiles (for example, task worker, knowledge worker, or mobile worker), and Cisco has various Virtualization Experience Clients to meet those different needs.
The Cisco VXC 2111 and VXC 2112 provide an integrated form factor that is paired with a Cisco Unified IP Phone 8961, 9951, or 9971 for a fully integrated voice, video, and virtual desktop environment. The Cisco VXC 2211 and VXC 2212 provide a standalone form factor that can be used as simply a virtual desktop (for a task worker), or they can be paired with an IP phone for a fully integrated user environment. The Cisco VXC 4000 provides a software-only solution by using a re-purposed PC to provide the user with voice and virtual desktop functionality, while the Cisco VXC 6215 provides a Linux-based thin client for fully integrated voice, video, and virtual desktop in a single device.
I do not have direct experience with these clients yet, having upgraded to CUCM9 recently. I'm definitely going to research it now. There's much more info in the SRND link above to read.
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.