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10 Knowledge About Fiber Optic Distribution Box

The fiber optic distribution box is a widely used product in FTTH and FTTB. Its main function is to safeguard the connection point of the optical cable to the user end, ensuring that the access point of the optical cable remains stable, dust-proof, and waterproof. Its purpose is to minimize interference to the access signal of the optical cable from the external environment. With a variety of fiber optic distribution boxes available in the market, it can be challenging to choose the right one. To help you make an informed decision, the following ten points will provide you with a comprehensive understanding of the fiber optic distribution box.

The position of the fiber optic distribution box in the optical fiber communication

The fiber optic distribution box is used to shunt the optical signal to the user. The node protection device that shunts the optical signal is called the fiber optic distribution box. This is its position in optical communication field.

Application scenarios of fiber optic distribution box

The installation positions of the fiber optic distribution boxes depend on their scenarios. FTTH is on the floor. In the corridor, FTTB is on the wall of the building, FTTC is generally installed on the pole of the rural pole.

Internal structure of fiber optic distribution box

The function of the fiber optic distribution box is mainly to protect and split the fiber. Then its structure is divided into six parts:

Cable inlet: This interface is mainly used for external optical cable access. The inserted optical cable plays a fastening role at the access port and is not easy to loosen.

Cable glands: These are used to secure incoming fiber optic cables to the distribution box.

Splice tray: The external optical cable should be welded with the splitter or the headless end of the pigtail in the fiber optic distribution box, splice tray is necessary, which is convenient for welding and improves the success rate of welding.

Fiber splitter disks: Some fiber splitter disks are available in some models, and some are not. The fiber distribution tray and fusion splice tray in different kinds of fiber optic distribution boxes have various shapes, but the function is same.

Lockable covers: These are used to protect the contents of the distribution box from unauthorized access.
Outlet: The number of outlets can determine the basic model of a distribution box. The outlet is much smaller than the inlet port because the cable received from the user side of the fiber optic jumper or pigtail-based, the diameter of these wires are much smaller.

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Classification of fiber optic distribution box

According to the capacity, fiber optic distribution box can be divided into: 4 core, 6 core, 8 core, 12 core, 16 core, 24 core, 36 core, 48 core and so on. The 8-core and 16-core are the most used. According to the installation mode, it can be divided into wall-hanging type and holding pole type.

Installation method

According to the application scene, it can be divided into indoor and outdoor type.

Indoor optical fiber distribution boxes are usually installed in indoor computer rooms, equipment rooms, control rooms, etc., and are used to manage and connect optical cables in the network. Generally, special waterproof, moisture-proof, and anti-corrosion measures are not required. Indoor optical fiber distribution boxes are usually made of lightweight materials, small in appearance, beautiful in appearance, and easy to install and maintain. In addition, indoor optical fiber distribution boxes usually have to consider security and anti-theft issues, and locks and other security measures are required.

The outdoor optical fiber distribution box is usually installed outdoors to connect and protect outdoor optical cables. Outdoor optical fiber distribution boxes need to have certain waterproof, moisture-proof, and corrosion-resistant capabilities to ensure long-term stable operation of the equipment. Outdoor optical fiber distribution boxes are usually made of corrosion-resistant, explosion-proof, freeze-proof, and sun-proof materials. In addition, outdoor optical fiber distribution boxes also need to consider issues such as wind resistance, lightning protection, and dust protection to ensure the reliability and stability of the equipment.

According to function, it can be divided into ordinary distribution box and distribution box with splicing function.

Ordinary optical fiber distribution boxes are usually used to manage and connect optical cables in the network, including functions such as distribution, transfer, and protection of optical cables. Ordinary optical fiber distribution boxes have a simple structure, and there are usually only some optical fiber connection modules, distribution panels and other components inside, and there is no splicing function.

The fiber optic distribution box with splicing function adds the splicing function to the ordinary fiber optic distribution box. It can connect multiple optical fiber distribution boxes through splicing to realize the spanning and transmission of optical fiber signals. Fiber optic distribution boxes with splicing functions generally have more complex structures and more components, such as optical splitters, concentrators, switches, etc., which can achieve more complex fiber optic network topologies and higher fiber optic signal transmission rates.

Material of fiber optic distribution box

At present, the materials used by mainstream distribution box are: SMC, ABS+PC, ABS, PP. The most cost-effective of the four materials is ABS+PC, which is capable of meeting most of the material requirements of fibre distribution boxes at a moderate cost.

Manufacturing process and technology of fiber optic distribution box

Clarify the customer’s application requirements; if the existing product catalog can meet the requirements, we will produce according to the existing product flow.

Drawings: If the customer needs non-conventional products, we will draw drawings for the product structure design according to the customer’s needs. Mold die-open: simple mold can be successfully opened in half a month, complex mold need at least one month.

Injection molding: The speed of injection molding depends on the number of injection molding machines and the number of pieces molded at one time. A good manufacturer has injection molding machines that can mold 2000-3000 boxes per day, and can mold them quickly with a reliable delivery time.

Assembly: This process is the manual part and is the most differentiated part of the factory. Skilled and qualified workers, optimized processes and norms, and strict management are the hallmarks of a good manufacturer.

Testing and packaging: Good production is to have back-testing on every part of production, from the previous process to the next, always with a test in between.

How to choose between full-loaded distribution box and empty distribution box?

In general, the customer construction requirements are clear, unified specifications, it is recommended to use a full-loaded of the splitter box. If the customer’s requirements are more uncertain and require flexible handling, then an empty box can be used.

Quality inspection

Generally, the quality test of the fiber optic distribution box is mainly waterproof, dustproof test, impact test, some require high and low temperature, humidity test, full-loaded distribution with splitter, pigtail also need to do fiber-pass test.

Waterproof level test standard
IP XX degree of protection
IP dust rating (first digit)IP waterproof rating (second number)
0: no protection0: no protection
1: Prevent the intrusion of solid objects larger than 50mm1: Water droplets dripping into the shell has no effect
2: Prevent the intrusion of solid objects larger than 12mm2: When the shell is tilted to 15 degrees, water droplets dripping into the shell has no effect
3: Prevent the intrusion of solid objects larger than 2.5mm3: Water or rain has no effect on the shell from a 60-degree corner
4: Prevent the intrusion of solid objects larger than 1mm4: The liquid splashed to the shell from any direction has no damage effect
5: Dustproof, completely prevent foreign objects from entering5: Rinse with water without any harm
6: Dust tight, completely prevent dust intrusion6: Can be used in the environment in the cabin
 7: Can be immersed in water in a short time (1m)
 8: Soak in water for a long time under certain pressure

Impact resistance grade: IK08, IK09, IK10

IK08: Low requirements, that is, it does not affect the function of the object being hit when it is subjected to the same mechanical impact force of a steel hammer with a radius of 2.5 kg and a radius of 25 mm.

IK09: General requirements, the laboratory uses 1KG shot put, 1 meter high free fall, 3 points on the surface, bottom and cover, and the product is qualified if it is not damaged.

IK10: High standard, able to withstand the impact of a 5KG object falling from a height of 4 meters on the surface, with 3 points on the surface, bottom and cover, and the product is qualified if it is not damaged.

High temperature test: test the optical fiber distribution box in a high temperature environment to simulate the use in a high temperature environment. The high temperature test is usually carried out in an environment above 60°C, and the test time is usually more than 24 hours. The test content includes connection performance, electrical performance, mechanical performance, etc.

Low temperature test: The optical fiber distribution box is tested in a low temperature environment to simulate the use in a low temperature environment. The low temperature test is usually carried out in an environment below -40°C, and the test time is usually more than 24 hours. The test content includes connection performance, electrical performance, mechanical performance, etc.

Temperature cycle test: temperature cycle test is to test the optical fiber distribution box in high temperature and low temperature environment for multiple cycles to simulate the use in different temperature environments. The test time is generally more than 24 hours, and the test content includes connection performance, electrical performance, mechanical performance, etc.

These tests can help evaluate the performance and stability of the fiber optic distribution box to determine its reliability and durability. The test results can guide the production and design process to ensure the performance and stability of the fiber optic distribution box in different environments.

Market and Price

The fiber optic distribution box belongs to the FTTX scene product and belongs to the user access terminal. The market demand is rigid and the quantity is large.

There are many levels of price distribution boxes, mainly due to the different production standards and test standards of the suppliers. It is recommended not to choose the lowest price in the market to find fiber optic vendors.

Development trend of the fiber optic distribution box

The development trend of fiber optic distribution box is towards more advanced, intelligent and miniaturized designs, as well as more environmentally-friendly and energy-saving features. Here are some of the trends:

Smaller size: With the increasing demand for space-saving solutions, the fiber optic distribution box is becoming smaller in size while maintaining its functionality. This miniaturization trend will continue in the future, with smaller and more compact designs.

Intelligent control: With the development of smart cities, the fiber optic distribution box is also moving towards intelligent control. The integration of artificial intelligence, the Internet of Things (IoT), and cloud computing technologies will enable the fiber optic distribution box to become smarter, with more efficient and precise control.

Higher capacity: As data traffic continues to grow, the demand for higher capacity fiber optic distribution boxes is increasing. The development of higher capacity fiber optic distribution boxes will allow for faster and more reliable data transmission.

More environmentally-friendly: As environmental awareness increases, fiber optic distribution boxes are also moving towards more environmentally-friendly designs. The use of renewable energy sources and the development of energy-saving technologies will be integrated into future designs.

Easy installation and maintenance: As the demand for fiber optic distribution boxes increases, the ease of installation and maintenance will become increasingly important. The use of modular designs and plug-and-play technology will make installation and maintenance easier, reducing downtime and increasing efficiency. 

About Zion Communication

Are you in need of high-quality cables & wire, copper system equipment, fiber system equipment, and accessories for your security & fire protection, telecom/internet, data center, building & entertainment, and industrial needs? Look no further than HANGZHOU ZION COMMUNICATION CO., LTD.

Investing in New Technology and Innovation

At HANGZHOU ZION COMMUNICATION CO., LTD, we are committed to providing our customers with cutting-edge technology and innovation. That’s why we continue to invest in and build strong R&D capabilities. Our skilled team of researchers and advanced machines help us deliver outstanding quality, service, and products.

Exclusive Products and Systems

We believe in offering our customers the best, which is why we invest in other first-class factories and build strong cooperation with other top companies in the signal field and security systems. This allows us to offer exclusive products and systems to meet our customers’ inquiries and exceed their expectations.

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Our management and international sales teams are dedicated to ensuring our customers’ utmost satisfaction. We have an experienced team of experts who strive to provide quick and efficient service for every inquiry, quote, and order. We pride ourselves on meeting and often exceeding our customers’ expectations.

Stephen Xie

Stephen Xie

Hello, I'm Stephen Xie, a sales representative at Hello Signal. I specialize in Passive Optical Components and Cabinet & Racks. I can recommend the most suitable products at competitive prices, ensuring worry-free service. Feel free to contact me with any questions.

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