RCDD · Question #343
What type of optical fiber is used primarily for outside plant (OSP) applications?
The correct answer is B. Loose-tube. Loose-tube fiber optic cable is the standard choice for outside plant (OSP) installations - such as underground, aerial, and direct-buried runs between buildings. In loose-tube construction, fibers float freely inside a gel-filled tube (or dry water-blocking materials), which…
Question
What type of optical fiber is used primarily for outside plant (OSP) applications?
Options
- ATight-buffer
- BLoose-tube
- CBreakout style
- DDuplex zip cord
- ERibbon
How the community answered
(33 responses)- A9% (3)
- B85% (28)
- C3% (1)
- E3% (1)
Explanation
Loose-tube fiber optic cable is the standard choice for outside plant (OSP) installations - such as underground, aerial, and direct-buried runs between buildings. In loose-tube construction, fibers float freely inside a gel-filled tube (or dry water-blocking materials), which isolates them from physical stress, moisture, and temperature expansion/contraction. This design prevents strain on the glass fibers when the cable flexes or the jacket changes length with temperature. Tight-buffer, breakout, and duplex zip cord styles are all designed for indoor use where environmental exposure is not a concern. Ribbon cable is used for high-density indoor/data-center applications. For any run that exits a building or is exposed to the outdoor environment, loose-tube is the correct choice.
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