Abstract: An optical packet switching apparatus includes an optical packet switching apparatus, an optical transmitting apparatus, and an optical packet receiving apparatus. The optical packet transmitting apparatus includes a packet generator for generating a packet signal by adding the routing information to a received client signal, a BIP adding unit for adding BIP to the generated packet signal, and an electrical-to-optical converter for converting the packet signal, to which the BIP has been added, into an optical packet signal so as to be sent out. The optical packet receiving apparatus includes an electrical-to-optical converter for converting the received optical packet signal into an electrical packet signal, and a BIP comparison unit for detecting the error occurrence in the packet signal, based on the BIP added to the packet signal.

Abstract: An optical packet switching apparatus includes an optical packet switching apparatus, an optical transmitting apparatus, and an optical packet receiving apparatus. The optical packet transmitting apparatus includes a packet generator for generating a packet signal by adding the routing information to a received client signal, a BIP adding unit for adding BIP to the generated packet signal, and an electrical-to-optical converter for converting the packet signal, to which the BIP has been added, into an optical packet signal so as to be sent out. The optical packet receiving apparatus includes an electrical-to-optical converter for converting the received optical packet signal into an electrical packet signal, and a BIP comparison unit for detecting the error occurrence in the packet signal, based on the BIP added to the packet signal.

Abstract: A first terminal device includes an input unit which inputs operation information indicating operation content, and a first transmission unit which transmits packet information including operation information input from the input unit and destination information for designating a second terminal device, which is a transmission target of the operation information among a plurality of terminal devices to an operation information transmission server. The operation information transmission server includes a first reception unit which receives the packet information transmitted from the first transmission unit and a second transmission unit which refers to the destination information included in the received packet information and transmitting the packet information addressed to the second terminal device corresponding to the destination information.

Abstract: Optical wavelength converter having a configuration whereby both RZ code and NRZ code can be handled without producing the duty deterioration in the waveform. The optical wavelength converter provided for converting an optical signal in a first optical wavelength band into an optical signal in a second optical wavelength band includes an optical-to-electrical converter for converting an input optical signal into an electric signal; an electrical-to-optical converter for converting the electric signal into an optical signal; and a duty control circuit connected between the optical-to-electrical converter and the electrical-to-optical converter for controlling the duty of the electric signal having been converted by the optical-to-electrical converter according to RZ/NRZ code information.

Abstract: Optical wavelength converter having a configuration whereby both RZ code and NRZ code can be handled without producing the duty deterioration in the waveform. The optical wavelength converter provided for converting an optical signal in a first optical wavelength band into an optical signal in a second optical wavelength includes an optical-to-electrical converter for converting an input optical signal into an electric signal; an electrical-to-optical converter for converting the electric signal into an optical signal; and a duty control circuit connected between the optical-to-electrical converter and the electrical-to-optical converter for controlling the duty of the electric signal having been converted by the optical-to-electrical converter according to RZ/NRZ code information.