This American National Standard specifies a media-level, point-to-point, 12-channel, full-duplex,electrical/optical interface, with each channel operatingat 500 Mbit/s or 1 Gbit/s. Multimode (MM)fiber cables, and single-mode (SM) fiber cables,are used for distances up to 1 km when carryingthe HIPPI-6400-PH protocol. Differential signalsare used on the electrical side.Specifications are included for:– 12 separate full-duplex channels, each capableof 500 Mbit/s or 1 Gbit/s operation;– operating distances of up to 780 m over multimodefiber and 1 km over single-mode fiber;– the fiber media and connectors;– the optical signals, including eye-safety considerations;– the differential electrical signals;– an overall channel-to-channel skew specification.A HIPPI-6400-OPT interface may be included withother electronic components on a printed circuitboard, or may be fabricated as a plug-in daughterboard. HIPPI-6400-OPT does not mandate aspecific connector on the electrical side.