暗光纖

暗光纖 Dark fiber

暗光纖指的是已經鋪設但是沒有投入使用的光纜。很多時候通信公司會鋪設多餘其需求的光纖數量，以適應將來的需要而避免反覆的光纖鋪設帶來的高額成本。暗光纖可能被租用給個人或者其他公司，用於在他們自己的場所之間建立光連接。在這種情況下，光纖既不受電信公司控制也沒有連接到電信公司，而是由公司或者個人提供必要的設備使得其正常運作。

Dark fiber refers to unused fiber-optic cable. Often times companies lay more lines than what's needed in order to curb costs of having to do it again and again. The dark strands can be leased to individuals or other companies who want to establish optical connections among their own locations.

In this case, the fiber is neither controlled by nor connected to the phone company. Instead, the company or individual provides the necessary components to make it functional.