Does the videophone of the property need a network?

The videophone consists of telephone, camera equipment, TV receiving and display equipment and controller. Videophone phones are used for calls just like ordinary phones. The function of camera equipment is to capture the images of local users and transmit them to each other; Television receiving and display equipment, its function is to receive the image signal of the other party and display the image of the other party on the screen.

According to the different image display, videophone can be divided into static image videophone and dynamic image videophone. Static image The image displayed on the screen by videophone is still, and the existing analog phone system is used to transmit image signals and voice signals alternately, that is, you can't talk when transmitting images; It takes 5- 10 seconds to transmit the user's half-length still image.