Fusion splicing once was predominantly the domain of outside-plant installers and technicians who used the method to connect singlemode fibers for long-haul and large-campus networks. As The Fiber Optic Association explains in its Reference Guide to Fiber Optics, “Fusion splicing is the most widely used method of splicing, as it provides for the lowest loss and least reflectance, as well as providing the strongest and most reliable joint between two fibers.”