Views: 100 Author: Site Editor Publish Time: 2026-01-27 Origin: Site
One of the most frequent questions we receive from network engineers is: "Should I use a dome-type or an inline-type splice closure?" While both serve the same purpose—protecting fiber splices—their structural differences make them suited for very different scenarios.
Dome closures (also known as bottle-type) are characterized by their upright design.
Pros: They offer excellent protection in underground manholes and are generally easier to seal because the base and the dome are the only two main parts.
Best For: High-capacity branching and vertical installations in manholes or pole-mounting where space is available.
Inline closures (horizontal type) are flat and elongated, looking much like a rugged briefcase.
Pros: Their slim profile makes them ideal for environments with limited space. They are often used in "straight-through" splicing where cables enter from one side and exit from the other.
Best For: Aerial strand mounting and shallow underground applications.
To make the right choice, consider these three factors:
Mounting Position: Aerial (Inline is often better for wind resistance) vs. Underground (Dome is often more robust for water pressure).
Splicing Capacity: Dome closures often allow for more stacked trays.
Ease of Re-entry: How often will your technicians need to open the box to add subscribers?
There is no "one-size-fits-all" solution. Understanding the environment of your ODN (Optical Distribution Network) is the first step toward choosing the right hardware.
