Two sources of loss caused by mismatched fibers are directional; numerical aperture (NA) and core diameter differences inherent in the fibers being joined. Differences in these two will create connections that have different losses depending on the direction of light propagation. This is essential for extending network reach, repairing breaks, or connecting cables in data centers and telecom infrastructure. The goal is to align the microscopic glass cores (typically. This is where fiber optic cable splicing—the process of creating a permanent, high-performance join between two fiber ends—becomes critical. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. The fiber optic cables of various lengths like more than 5kms, 10kms, etc.