For standardized fiber optics and premises cabling, standards are now under the auspices of the TIA Technical Committee TR-42 for the US and ISO JTC 1 internationally which also handles premises or structured cabling, including unshielded twisted pair copper and fiber optics. 'A document established by consensus and approved by a recognized body that provides for common and repeated use, rules, guidelines or characteristics for activities or their results, aimed at the achievement of the optimum degree of order in a given context'. This article explains eight of the most important global fiber and cable standards — ITU-T, IEC, TIA, ISO/IEC, and Telcordia — covering their scope, applications, and why they matter in. The FOA is involved in several groups that write standards for fiber optic components, network design, installation and testing and some FOA personnel have been involved in writing standards for over 35 years, so we understand standards. Standards have existed as long as. ANSI/TIA‑568. 11 Optical Fiber Systems Subcommittee and published in September, 2022. Scope: This Standard specifies performance, transmission, and test and measurement requirements for premises optical fiber cable. Fiber optic technology has become the backbone of modern communication networks, supporting everything from global internet infrastructure and cloud data centers to 5G wireless systems and industrial automation.