: Provides switch control for physical layer switches using the 6400 Mbits/second High-Performance Parallel Interface (HIPPI-6400), a high-performance point-to-point interface between data-processing equipment. The purpose of this standard is to facilitate the development and use of the HIPPI-6400 in computer systems by providing common physical switch control. The standard provides switch control structures for physical layer switches interconnecting computers, high-performance display systems, and high-performance, intelligent block-transfer peripherals. This standard also applies to point-to-point HIPPI-6400 topologies.