It will not effect any active call or cause a console to be unavailable. Once the console is updated – resources of the old IC Zone naming convention will be renamed to reflect the new Interop Channels for that zone. You will see those changes when you do a restart of the application (closing it with the X in the top right and then relaunching it - this is not the same thing as a reboot). Other IC zone resources which may have be on the consoles that are going away will simply disappear.