Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul applications, whereas fiber mechanical splicing offers a quick and practical solution for field repairs and temporary connections by using a junction to. Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul applications, whereas fiber mechanical splicing offers a quick and practical solution for field repairs and temporary connections by using a junction to. 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. A fiber optic pigtail is a fiber optic cable with one end terminated with a factory-installed connector and the other end unterminated. There are numerous use cases for fiber optic splicing. Splicing is most commonly used in the field but has application in cable assembly houses. Infield. Fiber optic splicing, crucial for maintaining seamless connectivity in modern communication networks, primarily uses two methods: fusion splicing and mechanical splicing.