First of all, we need to know what signal sources are in the conference system: such as multimedia desk plug, wireless screen projector, camera, high-definition video conference terminal, TV set-top box, or some high-definition signals from other floors. At present, most display devices are used: projectors, large-size televisions (including touch all-in-one machines), liquid crystal splicing screens and LED splicing screens. The storage device is generally an all-in-one recording and broadcasting machine. Limited by the transmission distance of HDMI, if the multimedia desk is more than 20 meters away from the cabinet, it is recommended to use a HDba-seT transmitter for video transmission. It is better for high-definition cameras to use SDI signals. There is no problem with SDI transmission of 70 meters, which can ensure the cleanliness and beauty of the back of the camera to the greatest extent. The wireless screen projector and video conference terminal will be installed in the cabinet. Most of the video output is HDMI. We can use a short HDMI jumper. If the projector or the TV in the conference room is more than 20 meters away from the cabinet, it is also recommended to use a HDba-seT transmitter for video transmission. The splicing screen controller is generally HDMI input interface, so we use HDMI,HDba-seT, more in the conventional conference room, there is also SDI interface. According to the actual equipment selection on your site, choose a suitable chassis and board.