The most basic type of videoconference involves a connection between two sites. However, if three or more sites are linked together, they require the service of a multipoint bridge. Each site calls the bridge using a pre-assigned set of video numbers. Once you have connected to the bridge, you are able to hear and see all of the other sites.
Most bridges are voice-activated.
Voice-activated switching refers to conferences where the sites generally display the video from the site with the strongest audio signal. That means that each speaker is automatically seen and heard by the other participants, and the person speaking sees the previous speaker. The cost of multipoint bridging can vary depending on who the provider is. Indicate which provider you would like to use and the arrangements will be made on your behalf. Each will be describe according to the role it plays in videoconferencing.