Does every patch panel have a safety door?

The safety door is the standard of the new national standard, and the socket must have a safety door device. The basic principle is not much different, and the ultimate function and purpose are the same: preventing foreign objects from being inserted by mistake and ensuring the safety of electricity use. However, the design structure of each brand of socket or plug-in safety door is a little different. For example, in Zheng Tai socket, the safety door is patented, which can not only prevent 75N unipolar insertion, but also prevent dust from entering and maintain the electrical conductivity of the socket. It is a professional safety door with good performance, which can prevent children from being inserted in wrong directions and protect family safety.