Optical communication card and communication device
Multiplexing-technology based large-capacity transmission requires the installation of many types of interface card. In addition, supporting a redundant configuration for preventing data communication from being interrupted requires the devices and cards more than double those required for the production system. An optical communication card (101) includes multiple optical signal transmission/reception units (102-1 to 102-N), main signal processing units (103-1 to 103-N) corresponding to the optical signal transmission/reception units (102-1 to 102-N) and required for a multiplexed system, and a connection selection unit (104) that can switch among multiple optical transmission lines, and each of the main signal processing units (103-1 to 103-N) includes multiple function units (201 to 204) and a function selection unit (205).