Optical cable and optical cable system

An optical cable system, for a building having a plurality of floors, the system comprising:

• a distribution box;
• and
• a plurality of optical cables connected to the distribution box, wherein each of the optical cables comprises:
• an optical cable skeleton;
• a plurality of optical fiber units that are grouped into multiple optical fiber groups;
• and
• wherein a plurality of skeleton slots are recessed in a periphery of the optical cable skeleton, the number of the skeleton slots is same as the number of the optical fiber groups, each of the skeleton slots is configured to receive a respective optical fiber group;
• at least a part of the optical fiber units in the skeleton slot are led and extended to a user premise on a corresponding floor through a splitter;
• wherein each of the optical fiber groups comprises a plurality of optical fiber units that are separately received in a corresponding one of the skeleton slots, the optical cable is vertically placed so that the optical fibers units received in the skeleton slot recline on inner walls of the skeleton slot;
• wherein the optical cable skeleton is an SZ-shaped optical cable skeleton, and each of the skeleton slots is distributed on a periphery of the optical cable skeleton in an S-Z spiral shape;
• and
• wherein an S-Z angle of the SZ-shaped optical cable skeleton enables the skeleton slot to provide a support force for the optical fiber unit, wherein a combination of the support force provided by the skeleton slot and a friction force between the skeleton slot and the optical fiber unit substantially balances a gravity of the optical fiber unit when the optical cable is vertically placed.

An optical cable, comprising:

• a skeleton;
• and
• a plurality of optical fiber units that are grouped into multiple optical fiber groups,
• wherein the skeleton comprises a plurality of accommodating grooves that are distributed on a periphery of the optical cable skeleton in S-Z spiral shapes;
• wherein the number of the accommodating grooves is same as the number of the optical fiber groups, and each of the accommodating grooves is configured to receive a respective optical fiber group;
• the accommodating groove provides a support force and a friction force to uniformly stress the optical fiber units accommodated inside the accommodating groove when the optical cable is vertically placed;
• wherein each of the optical fiber groups comprises a plurality of optical fiber units that are separately received in a corresponding one of the accommodating grooves, the optical fibers units inside the accommodating groove recline on inner walls of the accommodating groove;
• wherein each accommodating groove comprises a bottom surface, and a width of an opening of the accommodating groove is greater than a width of the bottom surface;
• wherein the optical cable further comprises:
• an outer protective sheath;
• and
• wherein the outer protective sheath comprises optical fiber identifications, and the optical fiber identifications are nested in the outer protective sheath and used to mark positions of the accommodating grooves for accommodating the optical fiber units.