会议系统的保密性比较强的话，有一套中控系统是非常有必要的。
If the security of conference system is strong, it is necessary to have a central control system.
控制范围：
Scope of control:
1、控制投影机开关、投影机亮度、对比度、色彩调整；
1. Controlling projector switch, brightness, contrast and color adjustment of projector;
2、投影机播放信号源的切换；
2. Switching of signal source for projector playback;
3、对电脑、视频、音频智能型切换设备、实时控制电脑、视频、音频信号的相互切换等；
3. Intelligent switching devices for computers, videos and audio signals, real-time control computers, video and audio signals, etc.
4、音响系统的音量大小进行控制；
4. Control the volume of the sound system.
5、对各种延时播放设备的控制，如DVD、录像机、影碟机等进行模拟原控制器各项功能的操作控制；
5. Controlling various delayed playback devices, such as DVD, VCR, DVD player, etc., to simulate the operation control of the original controller's functions.
6、对屏幕、窗帘、空调等有红外线发射的设备都可以控制。
6. It can control the screen, curtain, air-conditioning and other equipment with infrared emission.