Fiber optic splicing is the process of joining two fiber optic cables together so that light signals can pass with minimal loss or reflection. Splicing is typically required during cable installation, maintenance, or network expansion. Termination is the other, more frequent way of linking fibers. What is Fiber Optic Splicing and Why is it Needed? – #1. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. This technique ensures high-performance data transmission and is essential in extending cable runs, repairing broken links, or establishing new network paths in data. However, the introduction of splicing methods for fiber optic cables has allowed for permanent connections between different cables, overcoming the disadvantages of using optical fiber connectors.