Finisar Corporation (Finisar) is a provider of optical subsystems and components that connect short-distance local area networks (LANs), and storage area networks (SANs), and longer distance metropolitan area networks (MANs) and wide area networks (WANs). Its optical subsystems consist primarily of transmitters, receivers, transceivers and transponders which provide the fundamental optical-electrical interface for connecting the equipment used in building these networks. The Company operates in two segments. Optical subsystems consist primarily of transceivers and transponders sold to original equipment manufacturers. Network performance test systems include products designed to test the reliability and performance of equipment for a variety of protocols including Fibre Channel, gigabit Ethernet, 10 gigabit Ethernet, Internet small computer systems interface (Iscsi), serial-attached small computer system interface (SAS) and serial advanced technology attachment (SATA).