Abstract: Provided is an optical communication system including a multi-channel light source device configured to provide light source signals of N channels by splitting a non-modulated light signal with a first carrier wavelength of one laser diode (LD) into N channels and an optical communication device including a light signal receiver configured to photoelectrically convert a reception light signal received from an external light signal interface device through an optical fiber and transmit the converted signal to a communication signal processor and a light signal transmitter configured to modulate a data signal received from the communication signal processor into transmission light signals of N channels using the light source signals of N channels received from the external multi-channel light source device and transmit the modulated transmission light signals of N channels to the external light signal interface device through optical fibers.

Abstract: At least two egress provider edge (PE) routers of a service provider core network of a virtual private network are set as an anycast transport node. The same logical IP address and the same interior label are allocated to the egress PE routers. The same service label is allocated to virtual private networks, or private routes of virtual private networks, serviced by the two egress PE routers constituting the anycast transport node.

Abstract: At least two egress provider edge (PE) routers of a service provider core network of a virtual private network are set as an anycast transport node. The same logical IP address and the same interior label are allocated to the egress PE routers. The same service label is allocated to virtual private networks, or private routes of virtual private networks, serviced by the two egress PE routers constituting the anycast transport node.

Abstract: An Ethernet-based optical transmission system, and particularly, an apparatus and method for controlling a remote optical Ethernet device. An optical Ethernet apparatus includes a system recovery processor configured to output a system reset signal or a system power ON/OFF control signal and a system recovery controller configured to detect a system recovery command that occurs when a predetermined signal pattern is repeated the designated number of times for a designated period of time, and to control the system recovery processor using the detected system recovery command.

Abstract: An Ethernet-based optical transmission system, and particularly, an apparatus and method for controlling a remote optical Ethernet device. An optical Ethernet apparatus includes a system recovery processor configured to output a system reset signal or a system power ON/OFF control signal and a system recovery controller configured to detect a system recovery command that occurs when a predetermined signal pattern is repeated the designated number of times for a designated period of time, and to control the system recovery processor using the detected system recovery command.

Abstract: A network switch is disclosed, where predetermined terminals are connected to respective ports. The network switch includes an address setter that transmits an address including a physical address to be allocated to the terminals connected to the respective ports, and an address setting command through a corresponding port.