| 摘要 |
PROBLEM TO BE SOLVED: To easily and efficiently a branch work by ONU and reduce cost of the branch work, by using a conductive tension wire of an optical unit of a feeder-complex-type optical fiber cable as a commercial power supply, at a connecting end with the optical cable. SOLUTION: A constitution is made by twisting many optical units 2 around a support wire 1 twisted from a plurality of tensile strength wires (tension members). The optical units 2 of this feeder-complex-type optical fiber cable C has two conductive tension wires, and an optical fiber is arranged between these both conductive tension wires. The conductive tension members preferably have smaller electrical resistance, and must have required tensile strength. Thereafter, for example, the conductive tension members are copper wires, and wire diameter is 1.2 mm. They are twisted around the support wire 1 with receiving twisting-back, so that the optical units 2 is not twisted during twisting around the support wire 1.
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