PON SYSTEM AND ITS STATION DEVICE, AND TERMINAL DEVICE SET

摘要

In a PON system in which a station device is connected to a plurality of terminal devices through fiber networks (5)-(9), the system comprises the terminal devices (2),(3) for receiving data with a wavelength ?_d1 transmitted in a down direction from the station device (1) and transmitting data with a wavelength ?_u in an up direction, the terminal device (4) for receiving data with a wavelength ?_d2 different from the one ?_d1 transmitted in the down direction from the station device (1) and transmitting data with the wavelength ?_u in the up direction, and the station device (1) for receiving data with the wavelength ?_u transmitted in the up direction from the terminal devices (2)-(4) and selecting a wavelength corresponding each of the terminal devices (2)-(4) to which data are transmitted in the down direction and transmitting data with a multiplex form of two wavelengths ?_d1 and ?_d2.