Patent ID: 7639905

Claim:
An optical network unit (ONU) of a passive optical network system having an optical line terminal (OLT) and a plurality of optical network units connected to terminal users and the optical line terminal, the optical network unit comprising: a memory; a photoelectric conversion unit which photoelectrically converts signals from the terminal user and the optical line terminal; and a frame processing unit having a monitoring unit which monitors a channel request transmitted from the terminal user and an optical layer filter which selectively transmits, to the terminal user, a frame signal transmitted through the optical line terminal from an IPTV server, the memory being configured to hold a channel list to record a correspondence between channel information and optical transmission information of a channel of the passive optical network, the optical network unit further comprising a control unit, and being configured to execute control so that the optical layer filter selects the frame signal having the optical transmission information corresponding to the channel information of a switch channel and to transmit the frame signal to the terminal user based on the channel information of the switch channel included in a channel switching request of the terminal user acquired from the monitoring unit with reference to the channel list.