X2 is an updated product of XENPAK, it is a kind of optical transceiver for the transition of light and electricity in electro-optical communication. Based on the same function of transmitting 10G signal and same connectors as XENPAK, X2 transceiver is created to be only half the volume of XENPAK which is easier for installation and carrying. And it can realize the high-density application which XENPAK can not achieve. With the development of technology, X2 is later replaced by SFP+ and many other new-fashioned transceivers for a more effective use.
