Mechanical splicing is a fast way to join two fiber optic cables. The holder keeps the fibers steady. Fiber optics is the fastest and one of the safest ways to transmit information online. Acceptable fusion splice loss: ≤0. This process is fundamental to building and. It's the process of joining two fiber optic cables using techniques such as fusion splicing and mechanical splicing, crucial for maintaining uninterrupted communication networks. Splicing fiber helps light signals move easily, ensuring your internet connection remains reliable.