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Guide of Fiber Optic Terminal Box

Terminal boxes are suitable for a dispersed network structure after deploying the optical splitter. They are composed of fixed cable components, splitter modules, fusion splicing modules, storage areas and more.
fiber optic terminal box
Table of Contents

1. What is Fiber Optic Terminal Box

Fiber optic terminal box is a product use for different scenarios in FTTH construction, such as primary or secondary splitting.

People usually use it to connect patch cables from the splitter to the indoor cables, meeting the demands for high-speed bandwidth services. As an important optical access equipment in the ODN network, it’s crucial for users to access the internet.

It’s well-known as a distribution box when splitters install inside the terminal box. There are two types of distribution boxes: box-type and splice tray-type, depending on the type of splitter used.

Terminal boxes are suitable for a dispersed network structure after deploying the optical splitter. They are composed of fixed cable components, splitter modules, fusion splicing modules, storage areas and more. They can complete cable introduction and fixation, fiber fusion splicing and distribution, splitter installation and management, as well as storage and fixation of patch cables. This helps to increase the capacity of the optical network.

Outdoor terminal boxes can be wall-mounted or pole-mounted, while indoor terminal boxes can be wall-mounted in corridors or weak electrical wells.

Terminal boxes are available in two types of materials: composite materials and sheet metal.

2.Types of Fiber Terminatl Box

Based on Cable Connection Method

  • Straight-through Terminal Box: This type of terminal box has a single external hole for the receiving line.
  • Branched-type Terminal Box: This type of terminal box has several holes for the receiving line.

Based on the Number of Fibers Fused

Terminal boxes can classify as 2 in, 8 out, 4 in 24 out, 4 in 12 out, etc. based on the number of fibers fused.

Based on the Shell Material

Terminal boxes can be either plastic or metal shell optical fiber terminal boxes.

Based on the Style

Terminal boxes can classify as rack-drawer, wall-mounted, desktop-type and other types according to their style.

Indoor Fiber Termination Box

Indoor fiber distribution terminals are compact fiber box solutions design for small to mid-sized MDUs (Multiple Dwelling Units), or MTUs (Multiple Tenant Units) installation requirements.

Outdoor Fiber Optic Terminal Box

Outdoor fiber distribution terminals use for installing fiber in small and medium-sized MDUs or multi-dwelling units.

3. Differ between Cross Connect Cabinet and Terminal Box

Cross Connect Cabinet

According to YD/T 988-2015, an optical fiber distribution box is an interface device used to connect the backbone fiber optic cable and the distribution fiber optic cable outdoors.

Backbone ODF

The backbone ODF usually does not contain any fiber optic splitters, and the fiber cores of the backbone cable and distribution cable connect through single-core patch cords.

However, in some metropolitan area networks, to facilitate the access of peripheral services to the backbone ODF, a small number of fiber optic splitters may install in the ODF box.

Correspondingly, the backbone ODF uses a model that can accommodate a small number of fiber optic splitters.

Distribution ODF

The primary function of the distribution ODF is to connect the distribution cable, fiber optic splitter and incoming cable.

To reduce the number of active connections in the fiber optic link, the distribution ODF mainly uses a free-jumping connection method.

Optical Fiber Termination Box

Fiber optic terminal box is a device that serves as an interface to connect the incoming fiber optic cable with the butterfly cable , either inside or outside a building.

The optical fiber termination box contains fiber optic terminals and fiber optic splice or mechanical protection units

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