Fiber Optic Transceiver is widely used in wired networking applications such as Ethernet, Fibre Channel, SONET/SDH/ONT, CPRI, FTTx, and InfiniBand.
It can also be found in all switching and routing platforms including Ethernet switches, routers, firewalls, network interface cards, and fiber media converters.
Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of fiber optic transceivers.