The EXC-4000PCIe is an advanced Multi Protocol card (up to 4 modules) and together with the M4K717 module gives you a ARINC-717 test and simulation board for the PCI Express bus.
The EXC-8000PCIe is an advanced Multi Protocol card (up to 8 modules) and together with the M8K717 module gives you a ARINC-717 test and simulation board for the PCI Express bus.