Patent ID: 8199775

Claim:
An optical transmission device that transmits data to a plurality of destination addresses, comprising: a buffer that stores and outputs data of a first bit rate to fill one transmission device and data of a second bit rate to fill one transmission device, the second bit rate being greater than the first bit rate; a first header-attaching device that attaches a header of the first bit rate to the data of the first bit rate output from the buffer to generate a transmission device, the header of the first bit rate including identification data for identifying a destination address of the data of the first bit rate; a second header-attaching device that attaches the header of the first bit rate to the data of the second bit rate output from the buffer to generate another transmission device, the header of the first bit rate including identification data for identifying a destination address of the data of the second bit rate; an inserting device that inserts known bit patterns of the first bit rate in the data of the second bit rate at predetermined periodicity; and a transmitter that includes a frame creating device that creates a frame by performing time division multiplexing on the transmission device generated by the first header-attaching device and the second header-attaching device, and transmits the frame created by the frame creating device.