What is a Cisco Unified Videoconferencing MCU service prefix?
A. An MCU service prefix is a configuration parameter (number) in the Cisco Unified Videoconferencing MCU that dictates the specific meeting characteristics, such as Continuous Presence, G.722 audio, H.264 video for a 5 + 1 layout, and so on. If you use a custom meeting type, then you must specify the MCU service prefix in the meeting ID.