简单地说，视频会议系统包括视频会议终端、多点会议控制器mcu、网络管理软件和传输网络四部分。

Say simply, video conference system including video conferencing terminals, multipoint meeting controller MCU, network management software and transmission network four parts.

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多点控制单元(MCU)是多点视频会议系统的核心，它提供多点会议的管理和控制功能。

Multipoint control unit (MCU) is the kernel of multipoint videoconference system. It offers the function of management and control for multipoint conference.

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多点控制单元(MCU)是视频会议系统中一个非常重要的组成部分，但在目前的系统中一般均采用硬件来实现。

Multipoint Control Unit (MCU) is a key component of videoconferencing system, but it is realized by hardware in the present system.

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