Mitel 5760 VC User's Guide download pdf (Page 101)

Mitel Networks 5760 VC User’s Guide 8-1

8MULTI-PARTY VIDEOCONFERENCING

HROUGH AN MCU

8.1 Multipoint Control Units (MCUs)

An MCU (Multipoint Control Unit) is a device which provides videoconferencing

between more than two parties. The MCU joins the parties and switches the video

either automatically depending on who is speaking, or manually under the direction

of a moderator.

The 5760 VC supports both H.320 and H.323 MCUs.

q If you engage in a multipoint call over the LAN (contact an MCU’s IP

address), the MCU managing the videoconference is an H.323 MCU.

q If you engage in a multipoint call over ISDN lines (contact an MCU’s ISDN

numbers), the MCU managing the videoconference is an H.320 MCU.

Parties either call the MCU or they accept a call from the MCU. Then the MCU

engages in a separate call with each party simultaneously. When one party

transmits, the MCU receives the multimedia stream, multiplexes the audio and

video, and then sends the resulting streams to all the endpoints in the session.

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Mitel 5760 VC User's Guide Page 101