This article relates to Cisco TelePresence System Quick Set C20.
Q. When connecting to the second HDMI output on the TANDBERG Codec C20, nothing is displayed on the screen, why?
A. You will need to have the DualDisplay option key installed on the TANDBERG Codec C20 to use the second HDMI output.
Check your options from the TANDBERG products System information menu
Open the Home menu and go to: Settings > System information.
Make sure DualDisplay is listed in the Software > Options installed
Check your options using an API command
Log into the TANDBERG Codec C20 as admin using SSH (Secure Shell):
Execute the API command: xStatus SystemUnit
Make sure the DualDisplay option is listed as True.