Learn how to install a fiber optic termination box step-by-step for FTTH projects. Covers mounting, splicing, routing, labeling, and testing for indoor/outdoor use. There are numerous use cases for fiber optic splicing. As. Think of a fiber optic cable splice as the seamless stitching that keeps data flowing through the delicate threads of a network—like a master tailor joining fabric with precision. Whether in data centers, telecom rooms, or outdoor FTTx deployments, proper splicing inside a fiber enclosure ensures low signal loss, long-term stability, and easy maintenance. Why Fiber Optic Cable Joining. Splicing fiber optic cable is an extremely important phase for making dependable, high-speed communication infrastructures.