Transcom's 10G X2 transceiver is a highly integrated, serial optical
transceiver module for high-speed, 10Gbit/s data transmission
applications. 10G X2 module is protocol-specific: Either 10G Ethernet
or 10G Fibre Channel versions are available. X2 transponders are used
in datacom optical links only (not telecom), and they are smaller than
old generation XENPAK transponders. Its electrical interface to the
host board is also standardized and is called XAUI (4 x 3.125 Gb/s).