MultiSite: MCU built into the video system that allows multiple participants to be called. Video conferencing capabilities are not required in the called video systems. The maximum number of participants is four (including organizer) plus one audio-only call.
If the video system in use has MultiSite functionality, multiple participants can be called to initiate a video conference.
The MultiSite feature allows you to call three other systems on the video channel, plus a fourth system on the audio channel only (such as a cell phone).
The conference can then include four video participants and one audio participant.
If you wish to initiate a video conference, you must call the participants one at a time.