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. Funnel entry Colour code matched to crimp tool cavity identifier RBY. What is Fiber Optic Splicing and Why is it Needed? – #1. Installing a fiber optic termination box is one of those jobs that looks simple on paper, but it's easy to do poorly in the field. A. Fiber cable splicing is the process of permanently joining two optical fibers end-to-end to allow light signals to pass through with minimal loss. Unlike fiber connectors, which can be plugged and unplugged, splicing creates a fixed connection that is typically more stable and has lower insertion. This guide will walk you through the complete process of fiber optic splicing—covering each step in detail so you can deliver a clean, professional splice every time. Before jumping into the physical steps, it's important to understand the two primary methods of fiber splicing: fusion splicing and. Thus, a fiber termination box is used to terminate the optical fiber cables in the field and connect them to the pigtail by splicing.