The optical fiber termination box is mounted on the wall or on the 19 inches (483 mm) wide standard rack. A fiber pigtail is a specific hardware connection used for cable termination. It functions as a junction between the incoming fiber cable and the outgoing customer-side fiber cable, where one fiber can be spliced, patched. In short, the terminal box is the last structured node of the Fiber Optic System before service touches the subscriber. A typical PON topology (GPON, XGS-PON, or 25G PON) flows OLT → fiber distribution hub → passive splitters → distribution/drop fibers → premises. By understanding the components, types, and differences between various fiber management devices, businesses can make informed decisions when deploying and maintaining their fiber.