Finisar Corporation (NASDAQ:FNSR) designs, develops, manufactures, and markets optical subsystems and components that are used to interconnect equipment in short-distance local area networks (LANs), storage area networks (SANs), longer distance metropolitan area networks (MANs), fiber-to-the-home networks, cable television networks, and wide area networks. Its optical subsystems primarily include transmitters, receivers, transceivers, and transponders. The company is optical subsystems provides the fundamental optical-electrical interface for connecting the equipment used in building networks comprising switches, routers, and file servers in wireline networks, as well as antennas and base stations for wireless networks. It also offers products for switching network traffic from one optical wavelength to another across multiple wavelengths, known as reconfigurable optical add/drop multiplexers. The company is line of optical components principally comprises packaged lasers and photo-detectors used in transceivers for LAN and SAN applications; and passive optical components used in building MANs.