The MIL-STD-1553B multiplex data bus system offers a common means of interconnecting subsystems in military aircraft avionic systems. Presently the 1553B data bus structure accommodates the control, status, and data type of signals that comprise 80 to 90 percent internal interface exchange between avionic equipment. However, as a tool for overall avionic systems integration, this system can be used to implement integrated control and display panels, various processing architecture, and provide the ability to access the total avionic systems for monitoring status, built-in test, and diagnostics. Provisions for growth and modification are an inherent part of the design. The key feature of the MIL-STD-1553B system is its flexibility. The system can be utilized in total or in part to satisfy a particular interconnectivity requirement. In effect the system interrogator manipulates the system to satisfy his interface signal exchange by implementing the type of signal routing and bus control that is best suited to his needs. This is done within the constraints of a common protocol and data bus structure. Under contract No. N62269-77-C-0236 to NADC, (April 5, 1979) AiRsearch further exploited the flexibility of the 1553A data bus by developing a multiplex aircraft intercom system that demonstrated the ability of 1553 protocol and format to accommodate audio signals for exchange between crew members and radio equipment.


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