A carrier module is physically compatible with a XENPAK/X2 10 GE slot and
includes a socket for accepting a non-XENPAK/X2 module and interface
circuitry for providing appropriate signals to a XENPAK/X2 70-pin
connector on an interior side of the carrier module. The carrier module
includes a cookie, accessible by host software, identifying the type of
carrier module and non-XENPAK/X2 module accepted by the carrier card.