In this guide, we'll walk through the complete installation process-from tool preparation and fiber end-face preparation to fusion splicing, fiber routing, and final inspection-following industry best practices used by professional fiber installers. Even when premium optical cables and high-performance equipment are used, poor fiber splicing or improper fiber management inside a fiber optic terminal box can lead to increased insertion loss, signal attenuation, and costly maintenance. What is Fiber Optic Splicing and Why is it Needed? – #1. Regardless of the type of fiber network you're deploying, be it for telecom, enterprise data centers, or smart city infrastructure, fusion splicing provides the benefits of. Fusion splicing is a precise technique that permanently joins two optical fibers by applying heat to melt and fuse their ends together.