1. Communication terminals, transmission channels and switching equipment.
2. In addition to the three elements necessary for traditional communication networks, such as communication terminals, transmission channels and switching equipment, the data link also has special communication protocols, including frequency protocols, waveform protocols, link and network protocols and encryption standards.
3, in a broad sense, the data link system also includes elements such as information providers, users and managers connected to the data link, that is, command information systems, weapon systems and various sensors and other platforms closely connected to the data link.
The basic composition of data link can be summarized as three elements: terminal equipment, transmission equipment and communication specifications