We usually say "digital" refers to digital products containing "digital technology", such as digital cameras, digital learning machines, digital Walkman and so on. With the development of science and technology, the emergence and development of computers have led to a number of products with digital recording marks, replacing the traditional film, video tape, audio tape, etc., which we call digital products. For example, TV / communication equipment / mobile or portable electronic tools, to a large extent, adopt digitalization
Communication device,  is short for ICD, full name is industrial communication device. Wired communication equipment and wireless communication equipment for industrial control environment. The wired communication equipment mainly introduces the serial port communication, professional bus type communication, industrial Ethernet communication and the conversion equipment between various communication protocols. Wireless communication equipment mainly includes wireless AP, wireless bridge, wireless network card, wireless lightning arrester, antenna and other equipment.