For Fusion Splicing: Place both fiber ends into a fusion splicer. The machine automatically aligns them using core or cladding alignment technology, then fuses them with an electric arc. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. Splicing is typically required during cable installation, maintenance, or network expansion. The goal is to achieve the lowest possible optical loss (signal. A fiber optic cable splice is the process of permanently joining two fiber optic cables to create a continuous light path—vital when cables are cut, damaged, or need extending. Unlike connectors, which are used for temporary joints, splicing creates a.