In ISO/IEC 11801 and EIA/TIA standards five types of Multimode – OM1, OM2, OM3, OM4 & OM5 and two types of Single-mode – OS1 & OS2 fibers are mentioned. A full catalog of TIA specs is at org/ Learning More About Standards and Codes There are a number of ways of finding out more about cabling. Fiber optic networks are built on well-defined standards that ensure quality, performance, and interoperability. 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. These are fiber optic cable designations that originated in the international ISO/IEC 11801 standard. The designations indicate a particular level of performance. OS levels are for singlemode fiber and OM levels are for multimode fiber. This work materialized through the development of good practices, procedures and specifications documents, reflecting a certain state of the art at a given time, and the result of a consensus of all stakeholders (op lable. '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'. Standards are what makes technology.
