In this guide, we'll walk you through exactly how to splice fiber without a fusion splicer, covering the tools you need, the step-by-step process, performance specs, and common mistakes to avoid. By the end, you'll be equipped to make clean, low-loss connections in any field scenario. This temporary fix will get your network back up and running, giving you time to source new fiber cable. Before diving deeper into mechanical splicing, it's helpful to understand the two basic types of fiber splicing used in the field: 1. Whether repairing a broken cable or extending a fiber run, fiber optic splicing ensures light signals travel. Fiber optic cable splicing involves joining two fiber optic cables together.