This article explains the core differences between OS1 and OS2 singlemode fibers, as well as OM3, OM4, and OM5 multimode fibers—to help OEM clients, installers, and data center engineers make informed decisions. Unlike copper wires, which are limited by lower data transmission speeds, shorter transmission distances, and higher susceptibility to electromagnetic interference, fiber optic cables offer unparalleled performance and can cover much greater distances without bumping up against signal degradation. There are different types of fiber optic cables because each type is optimized for specific applications that have unique requirements for bandwidth, transmission distance, and environmental factors. The choice of fiber optic cable depends on the specific needs of the application, as well as the. The ST or Straight Tip connector is one of the oldest types still in use. It is designed for a single fibre strand and has a metal body which is screwed onto a thread on the socket to secure the connection. However, the low water peak fibers classified as ITU-T G. Before diving into. In high-speed network infrastructure, choosing the right type of fiber optic cable is essential for performance, cost-efficiency, and long-term scalability.