OSP stands for "Outside Plant" in the telecommunications industry. It refers to all of the physical equipment, cables, and infrastructure that are located outside of a building, including supporting infrastructure such as conduit, cabinets, towers, or poles. OSP cables are designed to withstand harsh environments, such as flooding, moisture, and extreme temperatures, and are used to extend the reach of cabling systems and business networks. Designing an OSP network is a highly specialized function, and getting it right can be difficult. OSP engineers are responsible for designing and building telecommunications infrastructure, such as fiber optic systems, in the air and below the Earths surface. In summary, OSP refers to the physical assets upon which connectivity runs and the deeply detailed documentation that gives an ISP the information it needs to offer.