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Fiber Optic Connection Protection: Fiber Optic Splice Closure

Views: 0     Author: Site Editor     Publish Time: 2024-04-26      Origin: Site

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The fiber optic splice closure is to place two or more optical cables that have been spliced by a fiber splicer in a standard order. The excess parts are coiled in a figure-8 shape in the box. The coiling radius should not be less than 4cm (to avoid breaking the optical fiber). The requirements Coiled neatly. The fiber optic splice closure has the function of protecting the splicing part of the components. It is necessary for the optical fiber splicing part in the construction of optical cable line projects, and is one of the very important equipment. The quality of the fiber optic splice closure directly affects the quality of the optical cable line and the service life of the optical cable line.


The fiber optic splice closure belongs to the mechanical pressure sealing joint system and is a splice protection device that provides optical, sealing and mechanical strength continuity between adjacent optical cables. It is mainly suitable for straight-through and branch connections of various structural optical cable laying methods such as overhead, pipeline, and direct burial.

The box body is made of imported reinforced plastic, which has high strength and corrosion resistance. The splice closure is suitable for splicing structural optical cables in the terminal. It has a mature structure, reliable sealing and easy construction. Widely used in communications, network systems, CATV cable TV, optical cable network systems, etc. The picture shows a two-in and two-out horizontal joint box.


It is used for protective connection and fiber distribution between two or more optical cables. It is one of the commonly used equipment for user access points. It mainly completes the outdoor connection function of distribution optical cables and household optical cables, and can be accessed according to FTTX Need to install box type or simple optical splitter.

Product Features

·The box body of the product is made of high-quality engineering plastics.

·The product adopts secondary cable compression technology to ensure that there is no additional attenuation of the optical fiber in the box.

·The product has multiple reuse and expansion functions.

The fiber optic splice closure classification

1. According to the appearance structure, it can be divided into two types: Dome fiber optic splice closure and horizontal fiber optic splice closure

2. According to the laying methods of optical cables, there are types such as overhead, pipeline (tunnel) and direct burial;

3. According to the optical cable connection method, it is divided into two types: straight-through connection and branch connection;

4. According to the sealing method, there are heat shrink seal type and mechanical seal type.


General requirements

1. It has the performance of restoring the integrity of the optical cable sheath and the mechanical continuity of the optical cable reinforcement components.

2. Provide the function of electrical connection, grounding or disconnection of metal components in optical cables.

3. It has the ability to protect optical fiber connectors from environmental influences.

4. Provides the function of placing optical fiber connectors and storing remaining optical fibers.

5. When necessary,  should also have termite-proof properties.

Optical properties

After the optical fiber connector is protected by the splice closure, it should be protected from moisture erosion, and the attenuation of the optical fiber connector before protection should not be increased. The remaining optical fiber in the fiber optic splice closure is coiled in the optical fiber placement device. During the installation and use of the fiber optic splice closure, the optical fiber connector should have no obvious additional attenuation.

Sealing performance

After the fiber optic splice closure is packaged according to the prescribed operating procedures, the inflation pressure in the fiber optic splice closure is (100±5) kPa. It should be immersed in a clean water container at normal temperature and observed steadily for 15 minutes. There should be no bubbles escaping, or a 24-hour barometer should be observed stably. There should be no change in instructions.

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