防止主要或非预期红外源干扰的建议，以保持预期传输不受干扰。不包括安全要求、光纤通信、报警系统、红外遥测和交通信息系统。

Recommendations for preventing disturbances from primary or unintended infra-red sources so as to leave intended transmission undisturbed. Excludes safety requirements, optical fibre communications, alarm systems, infra-red telemetry and traffic information systems.