The simplest method: join two pre-terminated cables via a coupler (also called an adapter). The coupler aligns the two connector ferrules using a zirconia sleeve. Why join two fibres? Need to extend, repair or join two fibre optic cables? There are three main methods, each with its own advantages and limitations. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. At Turn-Key. According to Cambridge Dictionary, to splice means to “join the ends of something so that they become one piece. There are numerous use cases for fiber optic splicing. This step-by-step guide aims to provide a comprehensive understanding of the techniques and considerations involved in successfully connecting optical fibers, offering invaluable. A fusion splicer is a specialized tool used in fiber optic networks to join two fiber optic cables together permanently.