The tips of two fibers are butted together and heated so they melt together. This is normally done with a fusion splicer, which mechanically aligns the two fiber ends, then applies a spark across the fiber tips to fuse them together. A mechanical splice is designed to hold two fiber cables in a way that allows light to pass through seamlessly, with a typical loss. Fiber optic splicing, crucial for maintaining seamless connectivity in modern communication networks, primarily uses two methods: fusion splicing and mechanical splicing.