Fiber Optic Closure

We are the largest Business expert

We are Yuyao Liangpin Telecom Equipment Co., Ltd., a full-service of designing and manufacturing company specializing in providing products and solutions to ODN & FTTX industries.

To echo the new emerging FTTx market and rapid growth of telecommunication infrastructure, our company is started in 2009, gathering the ability of technology of fiber optical communication, understanding the requirement of product design and skilled production for plastic injection industry, we are leading, well experience and wide product range company in this particular industry.

Why Choose Us

Our Certificate
ISO 9001, Patents (China)

Professional Team
Our production capability is annual 2 million pcs optical closure or 5 million pcs optical termination box, export most products toward worldwide and more than 80+ countries have our products and services.

Factory
Factory is located in Yuyao, Zhijiang where is famous in industry of plastic injection and near to Ningbo port and Shanghai port where it has benefited in both manufacturing and transportation.

Production Equipment
16 sets of injection machines, 4 assembly lines, the annual capability of product manufacturing is about 1 million pcs of optic closure/terminal closure and 2 million pcs of optic termination box.

First 12 3 4 Last 1/4

What is Fiber Optic Closure？

Fiber optic splice closures, also called fiber optic closures, are widely used everywhere, including in harsh environments, since they’re designed to keep fiber optic splices and joints safe and sound against a hostile environment, such as dirt, dust, wind, moisture, rain, insects, even intentional sabotage, etc. There’re varieties of designs of fiber closures corresponding to different placements and requirements. When you plan to deploy your cabling system, it’s better to learn some basics of fiber optic splice closure, as it plays an essential role in the entire wiring.

It provides space and protection for sensitive spliced fibers from environmental hazards, like pressure, extreme temperatures, insects and moisture, and so on. The fiber optic splice closure is rugged, hermetically sealed, waterproof, weatherproof, and with high tensile resistance.

Benefits of Fiber Optic Closure

Fiber Optic Protection

Sturdy and stable structure, with excellent mechanical strength to protect the optical cables from external environmental influences, such as vibration, impact, etc.

Dust and Waterproof

Fiber Optic Closure adopts a sealed design, which can effectively prevent dust, moisture, and other impurities from entering, protecting the fiber optic connection point from damage.

Multi Environment Applications

Made of high-strength materials, can effectively prevent material aging caused by cold, heat, oxygen, ultraviolet radiation, etc., is suitable for different indoor and outdoor environments.

Easy Installation

The installation of fiber joint closure is simple and convenient, providing easy fiber access and management.

Type Of Fiber Optic Closure

Horizontal Fiber Optic Splice Closure
This is the most common type of fiber splice closure, very likely because of its versatility. It is pretty flat or cylindrical in terms of appearance. Either mounted aerially or underground, horizontal fiber closures could differ in the number of splice trays and capacities, as a high-capacity one could hold much more fiber counts. Generally speaking, standard numbers for tray capacities include 12 and 24.

Vertical Fiber Optic Splice Closure
Vertical fiber closure looks like a dome in shape, also called fiber dome closure, designed for buried applications, yet can be used above grade as well. Like the horizontal variety, the vertical variety also has various configurations in numbers of splice trays, capacities, etc. Needless to say, the high-capacity version, as its name indicates, has much more capacity, meaning more inlet and outlet ports.

Hybrid Fiber Optic Splice Closure
Besides the two mentioned above, there is a hybrid variety of fiber optic splice closure. A hybrid version combining the advantages of both horizontal and vertical types has come in to meet the above- and below-grade applications demand.
Its main draw lies in all-around versability, allowing for wall, aerial, or cell installations regardless of weather, temperature, or location. Even pedestal mounting and below-grade applications are feasible for a compact design of hybrid variety.

What are Applications of Fiber Optic Closures

Fiber optic closures are devices used to protect and seal the ends of fiber optic cables and splice points. These closures are typically made of plastic or metal and are designed to provide a sealed environment for the fiber optic connections while also allowing easy access for maintenance and repairs.

Outside Plant (OSP) Network: They are used in OSP networks to protect and seal the fiber optic splice points and terminals in telephone poles, underground vaults, and other outdoor locations.

Inside Plant (ISP) Network: They are used in ISP networks to protect and seal the fiber optic splice points and terminals in buildings and other indoor locations.

Cable Television (CATV) Network: They are used in CATV networks to protect and seal the fiber optic splice points and terminals in head-ends, hubs, and other locations.

Wireless Networks: They are used in wireless networks to protect and seal the fiber optic splice points and terminals in base stations and other wireless network locations.

Data Centers: They are used in data centers to protect and seal the fiber optic splice points and terminals in racks, cabinets and other locations where fiber optic cables terminate.

Fiber optic closures are available in different sizes and designs depending on the application and environment they are used. They are also available in different protection levels (IP rating) to protect the splices from various environmental conditions such as water, dust, and temperature.

Why Is The Sealing Method Of A Fiber Optic Closure Important?

The sealing method of a fiber splice closure is paramount for several reasons.

Firstly, it protects against environmental hazards like moisture, dust, and debris that can damage delicate fiber optic cables. Effective sealing thus guarantees the longevity and reliability of your network.

Moreover, a correctly sealed closure maintains optimal signal performance, keeping away foreign elements that can cause signal loss or degradation, resulting in poor network performance or total failure. Thus, these methods ensure the integrity and efficiency of the fiber optic system.

By thwarting the entry of water and other contaminants, the sealing methods significantly reduce the risk of electrical hazards and short circuits, thereby enhancing the network's overall safety.

Investing in robust sealing methods for fiber splice closures is non-negotiable to ensure a secure, reliable, and high-performing fiber optic network. It safeguards the cables from external threats while maintaining signal integrity and system safety.

Application of Fiber Optic Closure

There are hundreds of different designs and options on splice closures. Some are designed for concatenation of long distance cables where two identical cables are spliced together. Some closures are designed for connecting several smaller cables to a larger one for breaking out the larger cable to several destinations. Closures for FTTH preterminated cables (plug & play) may have connector mating adapters inside the closure to create a patch panel for the factory made drop cables. Closures can be used for midspan access, where the cable jacket is stripped but most of the buffer tubes are coiled inside without opening, while one or more tubes will be opened and fibers spliced to other cables.

Some splice closures have all cables entering into one end, usually called dome closures or sometimes called a butt closure, while some have cable entries on both ends, sometimes called inline closures. Inline closures are used in applications where two identical cables are spliced and an inline closure saves space or when making repairs to damaged cables. Dome closures with all the cables coming into one end are more popular since they are easier to handle when splicing and storing service loops and the single end seal can be more reliable.

There are splice closures designed to be buried, mounted on walls, hung from cables or poles. Some are small pedestals themselves. Each type has a particular application and probably every application has a special closure. Special hardware may be necessary for handling different cable or splice types, so make certain you have the right hardware before using the closure. It is recommended that you work with vendors to find the best closure for your applications then follow their instructions.

Patch panels often have splice closures built-in, especially when the patch panel has many connections. Special splice trays are in the back of the rack or on sliding trays for access. Often large numbers of fibers must be spliced so splice trays can be stacked high.

Another type of closure is a hybrid of splices and a patch panel. These are often used with fiber to the home (FTTH) networks where drop cables to individual subscribers are factory made preterminated cables and just require plugging in connectors - no splicing required. Here is two examples of fiber drop closures that use SC/APC connectors. Some use weather-resistant connectors on the outside of the closure to more simply connect cables without opening the closure.

Internal structure of Fiber Optic Closure

The support frame is the main body of the internal components.

Optical fiber cable fixing device, used for fixing the optical fiber cable and the base and fixing the reinforcing element of the optical fiber cable. The first is the internal fixation of the fiber optic cable strengthening core. The second is the clamping and fixing of the optical fiber cable and the support frame. The third is the sealing and fixing of the fiber optic cable and the inlet and outlet cables of the splice box with a heat-shrinkable sheath.

The optical fiber placement device can store the optical fiber connectors and the remaining optical fibers in order. The length of the remaining optical fibers should not be less than 1 meter, and the labyrinth of the remaining optical fibers should not be less than 35mm. The storage tray can be multi-layered and has a larger capacity, and the storage tray can be adjusted according to the number of cores connected by the optical fiber cable.

For the protection of optical fiber connectors, place the heat-shrinked protective sleeve on the fiber core fixing clip in the receiving tray, and the silica gel fixing method can also be used.

Seal the optical fiber cable and the optical fiber splice closure. Use abrasive cloth to polish the junction of the optical fiber splice closure and the optical fiber cable at the cable entry point of the base. Clean the polished area with detergent, paste it with aluminum foil, and then put the heat shrinkable tube on the optical fiber splice closure. At the cable entry point, use a blowtorch to heat slowly from the middle to the two ends, so that the entire heat shrinkable tube can be completely shrunk.

How to Maintain Fiber Optic Closure

Fiber Optic Closure are essential components in any fiber optic network. These closures are used to protect and connect fiber optic cables for use in harsh environments. Despite their importance, fiber optic splice closure can experience a range of issues that can cause problems with network performance.

Cable Damage
One of the most common issues with fiber optic closures is damage to the fiber optic cable. This can occur due to a number of factors, including excessive bending, crushing, or twisting of the cable. Damage to the cable can cause signal loss, poor performance, or even complete failure of the network.

Moisture Infiltration
Moisture Infiltration means that water and moisture can seep into the splice box, causing damage to cables and other components. Moisture can also cause corrosion, which can further damage closures and affect network performance.
To fix this issue, it is important to ensure that the fiber optic splice closure is properly sealed and protected from moisture.

Cable Bends
Another issue that can affect fiber optic splice closures is cable bends or kinks. These can cause stress on the fibers, which can lead to poor performance of network.
To fix this issue, the cable should be carefully inspected for kinks or bends. If there is a problem, it should be straightened slightly to relieve the stress on the fiber. In severe cases, it may be necessary to replace the affected cable.

Fiber Misalignment
Fiber misalignment can occur during installation or due to thermal expansion and contraction. This can cause attenuation or signal loss.

Poor connection Quality
Poor connection quality can also be a common issue with fiber optic splice closures. This can occur due to a range of factors, including dirty or damaged connectors, or poor quality splicing tools.

Cable Strain
Cable strain can occur when cables are pulled too tightly or when the splice closure is improperly installed or secured.
To fix this issue, it is important to ensure that the cables are properly secured and supported to prevent any unnecessary strain or tension.

Cable Slack
Excessive cable slack can cause the fibers to move around, which can lead to fiber breaks or attenuation.
To fix this issue, the cable slack should be reduced by adjusting the cable tie-downs or using cable clamps to secure the fibers in place.

Our Factory

We are Yuyao Liangpin Telecom Equipment Co., Ltd., a full-service of designing and manufacturing company specializing in providing products and solutions to ODN & FTTX industries.

FAQ

Q: What exactly is a fiber optic closure ?

A: A fiber optic closure is a device used to protect the ends of optical fiber cables from environmental contaminants and physical damage while allowing for the efficient management and routing of fiber connections.

Q: How do you select the correct size of fiber optic closure based on the number of fibers?

A: The size of the closure is determined by the number of fibers and the amount of slack required. Manufacturers provide tables or calculators to help determine the appropriate size based on the fiber count and cable configuration.

Q: Can a fiber optic closure support different types of connectors, such as SC, LC, ST, etc.?

A: Yes, many fiber optic closures are adaptable and can accommodate various connector types, although adapters or pigtails may be needed for certain configurations.

Q: What are the key differences between outdoor and indoor fiber optic closures?

A: Outdoor closures are typically more robust, with additional weatherproofing features and stronger enclosures to withstand the elements. Indoor closures are smaller, lighter, and focus more on protection from physical damage and less on weatherproofing.

Q: What are the common mounting options for fiber optic closures?

A: Fiber optic closures can be mounted on walls, poles, pedestals, or even underground vaults, depending on the application and the infrastructure available.

Q: What are the advantages of using a fiber optic closure over simply leaving the fiber ends exposed?

A: Exposing fiber ends can lead to contamination, damage, and signal degradation. Closures provide secure termination points, organized cable routing, and protection, which enhance the reliability and longevity of the fiber optic network.

Q: Can fiber optic closures support fiber optic splitters or taps?

A: Yes, some fiber optic closures are designed to accommodate passive optical components such as splitters and taps, which are used in PON (Passive Optical Network) architectures.

Q: How do you ensure that the fiber optic closure is properly sealed after installation?

A: After installation, it is critical to inspect the closure for any gaps or improperly seated components. Seals should be checked to ensure they are intact and creating a proper barrier against environmental elements.

Q: What is a cable closure?

A: Closing the loop – Factors in choosing the right fiber closure
At its simplest, a closure joins one length of fiber cable to a different length of the same type of cable. This is sometimes known as in-line closure or track joint. Added functionality is provided by a spur (or branch) joint which divides the cable into two ongoing parts - the main cable and a side or spur cable.

Q: What is the purpose of a fiber termination box?

A: Thus, a fiber termination box is used to terminate the optical fiber cables in the field and connect them to the pigtail by splicing. After an optical cable arrives at the user's end, it is fixed in the terminal box. Then, the optical cable core and pigtail are welded in the terminal box.

Q: What are the three types of fiber optic connections?

A: The common types of fiber optic connectors are LC, SC, MTP/MPO, ST, and FC. LC connector, as a main fiber optic connector, tends to be the most preferred one due to its compact size, high performance, and ease of use.

Q: What are the three types of fiber optic connectors?

A: In the USA for networking and audio/video, the three most popular styles are LC, SC, and ST. LC and SC tend to be the most commonly used styles. Today, ST connectors are seeing more limited usage.

Q: What does a fiber optic connector look like?

A: Most fiber optic connectors are plugs or so-called male connectors with a protruding ferrule that holds the fibers and aligns fibers for mating. They use a mating adapter to mate the two connector ferrules that fits the securing mechanism of the connectors (bayonet, screw-on or snap-in.)

Q: How do you put ends on fiber optic cable?

A: 3 Common Methods to Terminate Connectors on Fiber Cable
To terminate, the user just needs to strip and clean the fiber strand to a specific length set by the manufacturer and insert it into the rear of the connector until it touches the piece of pre-polished fiber where it meets the index matching gel inside the connector.

Q: What is the difference between green and blue fiber ends?

A: Blue singlemode connectors feature a UPC (ultra physical contact) fiber endface, while green singlemode connectors feature an APC (angled physical contact) fiber enface. And yes, it's important to understand the difference – especially when it comes to testing.

Q: What is the purpose of buffer tubes in fiber optic cable?

A: Buffer tubes are used on fiber optic cables to protect the fibers from signal interference and environmental factors since they are often used in outdoor applications. Buffer tubing also blocks water, which is critical for 5G applications especially, as they are used outdoors and are often exposed to rain and snow.

Q: Can vertical splice closure be used in aerial application?

A: They are suitable for protecting optical fiber splices in straight through and branching applications. Related fiber optic trays and splice protection sleeves are supplied with vertical splice closures. These products can be used in aerial, duct and direct buried fiber optic cable projects..

Q: What is the purpose of the terminal building?

A: To provide circulation, processing and holding space. To cater premium level of service with assurance of smooth operations like ticket, check-in, security check etc. To provide docking facility and adequate space for aircraft maintenance and servicing.

Q: What is the difference between cable and fiber optic line?

A: In copper cable (like coax or phone lines), electric signals flow through the copper, carrying data. But in fiber-optic cable, pulses of LED light carrying data travel at 70% the speed of light from one point to another.

Q: What kind of cable does fiber optic use?

A: A fiber optic cable is a type of cable that uses light to transmit data over long distances. It consists of a core made of glass or plastic that is surrounded by layers of protective material, such as cladding.

As one of the leading fiber optic closure manufacturers and suppliers in China, we warmly welcome you to buy fiber optic closure made in China here from our factory. All customized products are with high quality and competitive price. For pricelist, quotation and free sample, contact us now.

Dome Closure Heat Shrink Sealing, Dome Fiber Optic Splice Closure, Fiber Socket