MIL-STD-1553 is a military standard serial data bus. It was originally designed for military avionics, but is now widely used in both military and civil aircraft and spacecraft. The most recent version of the protocol is MIL-STD-1553B.
Speedgoat support MIL-STD-1553 with a dedicated I/O module, available with single or multi-function interface and one, two or four independent dual-redundant channels. Simulink driver blocks are provided.