Yangchun cable can't go into the pool. Yangchun cable can't go into the pool. If the network cable enters the water, it will be disconnected and cannot be used. Network cable is very important for connecting LAN. There are three kinds of common network cables in LAN: twisted pair, coaxial cable and optical cable. Twisted pair is a data transmission line composed of many pairs of wires. It is characterized by its low price, so it is widely used, such as our common telephone line.