These high-capacity cables transmit data using light signals, enabling global communication. The process involves local ISPs routing traffic through cable landing stations, undersea cable systems, and foreign data centers, often assisted by Internet Exchange Points (IXPs). How Fiber Optic works? Every time you make a video call, stream a. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber. The light is a form of carrier wave that is modulated to carry information.