1) peel the optical cable, be careful not to hurt the tube bundle, and take about 30mm in stripping length. 2) pass the optical fiber through the heat-shrinkable tube. The stripped cable is fragile and uses heat-shrinkable bushings to protect optical fiber connectors. 3) turn on the fiber fusion splicer power and choose the appropriate welding mode. There are two kinds of fiber fusion splicer powe...