The PMC-1553 Interface Card and AltaAPI Represent the Latest MIL-STD-1553 32-bit FPGA Protocol Engine Technology with Multi-Layer Software. Our Card and Software Packages are Designed for Fast, Portable Integrations. The PMC-1553 is the Only Commercial Off the Shelf (COTS) Card that Passes and Executes the SAE AS4111/4112 Protocol Tests.