This guide explores everything about fiber optic cable splice —from fiber fusion splice basics to how to splice fiber cable step-by-step—covering tools, techniques, and practical tips. Fiber optic splicing, crucial for maintaining seamless connectivity in modern communication networks, primarily uses two methods: fusion splicing and mechanical splicing. Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul. In this guide, we cover the basics of fiber optic splicing, how to perform splicing using two different methods, and finally some best practices to perform good fiber splicing. What is Fiber Optic Splicing and Why is it Needed? – #1. But what happens when you need to join two cables to extend a network or repair a break? You can't just twist them together. Done right, it produces connections with less than 0. 1dB loss that will last the life of the cable plant.