Abstract:In the maintenance of FC network in avionic system, a simulation test system based on ASM protocol is designed. It’s necessary to analyze the application of ASM communication board card which is the important part of the system. First,Described the structure and parts of the system;Second,Analyzed and compared the function and characteristic between No.1 board card and No.2 board card;Third,Introduced installation, application software and configuration;Finally,Given a communication instance based on the two board cards. The results are shown by the test: the instance meets the requirement of the simulation test system, and provides reference for design of simulation test system.