Unlike round cables, the butterfly design uses a self-supporting flat geometry that resists kinking, strips cleanly in seconds, and maintains signal integrity at bend radii as low as 5 mm. An indoor butterfly-shaped optical cable is a type of fiber optic cable designed for indoor use. It is named after its unique shape, which resembles that of a butterfly. It has the characteristics of indoor soft fiber optic cable and self-supporting fiber optic cable, and has the advantages of light weight. Butterfly FTTH drop cable is a popular type of fiber access optical cable, according to the different application environment and laying conditions, it has reasonable design of cable structure and technical parameters.