This is an IBM eServer Bladcenter Fibre Channel Expansion Card.  Its IBM Part Number is 13N2203.  This part also comes with mounting tray with IBM FRU 49P2514. Fibre Channel is a high-speed data transport technology used for mass storage and netowrking.  By adding BladeCenter fibre channel I/O expansion cards to the blade servers and fibre channel compatible I/O modules to the BladeCenter unit, you can attach the blade server to an external storage area network (SAN) through the external 2 Gbps (gigabits per second) optical ports on the I/O modules.  The BladeCenter Fibre Channel Expansion Card supports data-transfer rates up to 200 MB per second half-duplex and 400 MB per second full-duplex per port.  This item was originally made for use by an OEM as a part of a system. Even though it may have the same partnumber as a standard part; this item may be configured specifically for the OEM that originally order it.