SIU31 is a highly configurable rugged COTS system or subsystem ideally suited for military, industrial, and commercial applications that require high-density I/O, communications, Ethernet switching, and processing. The SIU31 uses one NAI field-proven, 3U cPCI board to deliver off-the-shelf, SWaP-optimized COTS solutions that Accelerate Your-Time-to-Mission.