The International Telecommunications Union publishes several standards related to the characteristics and performance of fibers themselves, including ITU-T G.651, "Characteristics of a 50/125 µm multimode graded index optical fibre cable" ITU-T G.652, "Characteristics of a single-mode optical fibre cable" Other standards specify performance criteria for fiber, transmitters, and receivers to be used together in conforming systems.
International Telecommunications Union udgiver adskillige standarder relateret til karakteristikker og ydelse af lysledere: ITU-T G.651, "Characteristics of a 50/125 µm multimode graded index optical fibre cable" ITU-T G.652, "Characteristics of a single-mode optical fibre cable" Andre standarder specificerer ydelseskrav for lysleder, sendere og modtagere så de kan anvendes sammen.