Modern avionics systems find switched Ethernet the dominant network architecture with MIL-STD-1553 and ARINC implemented for high reliability and legacy communications. For COTS systems, the most common method to integrate 1553 or 429 networks into the system is to add an interface card to the computer’s backplane—PCI or PCI Express. With Ethernet dominating the modern landscape, these legacy interfaces are still popular and will not be going away anytime soon.
To “bridge” the gap between Ethernet and MIL-STD-1553/ARINC 429, ethernet bridges are used to translate avionics messages in real-time between MIL-STD-1553, ARINC 429, and Ethernet in any direction.
Examples of Ethernet Bridges