Notes

• NOTE In an avionics system, where each unit appears with its identical backup, cross-strapped units provide all possible interconnections between them. For bus-connected systems all bus connected subsystems, components, and instruments are cross-strapped to their respective data buses. The overall system reliability of a space avionics system is significantly enhanced by cross strapping, as if one unit fails a redundant unit can take over without implying a complete switch-over to a redundant chain.