What term describes interactive electronic communication between multiple users at two or more sites, which requires an MCU or bridging device to connect sites?

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Multipoint teleconferencing describes interactive electronic communication among three or more participants at two or more sites, connected through a bridging device called a multipoint control unit. The MCU serves as the central hub that brings all sites into one conference, handling the streams from each location, coordinating who talks when, and often mixing audio and video or arranging layouts so everyone can participate in real time. This differentiates it from simpler point-to-point setups and from terms that are more general networking or mobile-health concepts. The other options don’t capture the idea of a multi-site, interactive conference that requires a dedicated bridging device to connect multiple locations.