Abstract
The Air Force is considering several token passing local area networks (LANs) for use on high performance aircraft. This paper compares two of the fiber optic LANs considered: the Society of Automotive Engineers (SAE) linear token passing bus (LTPB) and the American National Standards Institute (ANSI) fiber distributed data interface (FDDI). ARINC Research Corporation compared these two LANs in terms of their station and network topologies, media access control, capacity allocation, and latency. The SAE LTPB is a LAN designed for military avionics, while the ANSI FDDI was not originally designed for avionics. ARINC Characteristic 636 (1992) expanded the ANSI FDDI into a standard for commercial aircraft avionics which is discussed as an avionics application of the FDDI. >
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