Laying manner of the light ray path is used for that the optical fiber cable

摘要

PURPOSE:To branch the optical fiber cable without connecting optical fibers by integrating the optical fiber units corresponding to a required length and number of pieces including branch lines and simultaneously taking out the optical fiber units for the branch optical lines while laying the main optical line. CONSTITUTION:The optical fiber cable constituted by integrally housing the optical fiber units 5 of the length at which the main optical line can be formed from a start point to an end point and the optical fiber units 3, 4 of the length at which the branch optical lines can be formed from the start point via a branch point to the end point is used. The optical fiber cable is integrally led in from the start point up to the branch point. The leading in of the optical fiber cable is continued while the optical fiber cable is separated to the optical fiber units 5 for the main optical line and the optical fiber units 3, 4 for the branch optical lines at the branch point. The need for operations, such as connection of optical fibers, is eliminated at the branch point. The man-hours for operations are decreased and the attenuation of light signals occurring in the connection is eliminated.