Communication system by terminal with no power supply

摘要

A communication system includes a power-sourceless terminal (10) and a transmitting station (20). The power-sourceless terminal includes a photoelectric conversion section for receiving an intensity modulated optical signal and converting it to an electric signal, and a voice output section for outputting the electric signal passing through the conversion by the photoelectric conversion section in the form of voice. The transmitting station includes a transmission section for transmitting the optical signal having its intensity modulated depending on an electric signal of the information to be transmitted.