Central tube and stranded refer to what type of cable construction?

Central tube and stranded refer to what type of cable construction?

• A. Loose tube
• B. Tight-buffered
• C. Ribbon
• D. Armored

Answer: (A)

In fiber-optic cabling, loose-tube construction uses tubes that cradle individual fibers and are laid loosely inside the outer jacket. A central tube often holds the fibers, with other tubes arranged around it in a stranded pattern. This setup lets the fibers move a bit inside the tubes, which helps absorb bending and temperature changes without stressing the fibers, reducing losses from microbending. That combination—the central tube containing fibers and a stranded arrangement around it—is the hallmark of loose-tube cables. Tight-buffered designs place fibers directly in buffers with no loose tubes, ribbon cables keep fibers in flat ribbons, and armored cables refer to an outer protective layer rather than the tube-and-stranded configuration.

In fiber-optic cabling, loose-tube construction uses tubes that cradle individual fibers and are laid loosely inside the outer jacket. A central tube often holds the fibers, with other tubes arranged around it in a stranded pattern. This setup lets the fibers move a bit inside the tubes, which helps absorb bending and temperature changes without stressing the fibers, reducing losses from microbending. That combination—the central tube containing fibers and a stranded arrangement around it—is the hallmark of loose-tube cables. Tight-buffered designs place fibers directly in buffers with no loose tubes, ribbon cables keep fibers in flat ribbons, and armored cables refer to an outer protective layer rather than the tube-and-stranded configuration.