The VITA's VITA 66.4 standard defines optical backplane interfaces for VPX cards. Pentek's Model 5973 3U VPX FMC carrier card is designed to link FMC boards like Pentek's own Flexor FMC line to the backplane through the on-board, Xilinx Virtex-7 FPGA using its VITA 66.4 optical connections. The system was announced at VITA's 2014 Embedded Tech Trends.