PX-14S3-RS-R50 in the factory original packaging, this is a 14 slot footprint PICMG passive backplane with 2-PICMG slots, 1-ISA slots, and 12-PCI slots. It has an on-board PCI bridge. Note that up to two ISA cards could be used as long as one of the ISA cards does not conflict with the PCI connector on the PICMG slot.