This guide walks through a practical, real-world installation process used in FTTH deployments. It covers not only mounting and splicing, but also how to plan port capacity, manage slack, label correctly, and avoid common installation mistakes. ? Which equipment was used? What do they do? What about the relationship? Before clarifying these issues, we first need to understand the. In this blog, we will discuss the two types of fiber optic cables and the role of a simple yet essential piece of equipment in the fiber laying procedure-the, the Fiber Termination Box, or FTB. 2 What is a Fiber. Fiber optic adapters, also known as couplers, play a crucial role in fiber optic networks by providing a connection point between two fiber optic connectors. To establish easy and safe installation put the box where it will be installed and measure the required length of the cable. It functions as a junction between the incoming fiber cable and the outgoing customer-side fiber cable, where one fiber can be spliced, patched. Then how to convert the transmission media between the Outdoor Optical Network and the Indoor Ethernet Network? And what devices are used in the connection? What roles do they play? How about the relationship between them? The answers are as following. Firstly, the mainly used devices are fiber.