Fiber Optic Splice Closure


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Fiber Optic Splice Closure-Horizontal type 3 in 3 out
4 in 4 out Horizontal type Fiber Optic Splice Closure 48F
Fiber Optic Splice Closure-Horizontal type 3 in 3 out
3 in 3 out Horizontal type Fiber Closure 24F
1 in 1 out Horizontal type Fiber Closure 24F
3 in 3 out Horizontal type Fiber Closure 48F
3 in 3 out Horizontal type Fiber Optic Splice Closure
192Fiber optic Splice Closure-Horizontal type GJS (04)-7BY
48F Fiber optic splice closure with Splitter 5 ports
1 2 3 4

Fiber optic terminal box used in FTTX

OMC takes you to understand the fiber optic splice closure

Fiber optic splice closure is a device used to provide space and protection for optical cables that are spliced together. Fiber optic splice closure securely connect and store fiber optic cables in outdoor factories or indoor buildings. It can provide protection for fiber optic connectors and cables because of their excellent mechanical strength and rugged housing, ensuring that the connectors will not be damaged by harsh environments.


Classification of fiber optic splice closure

Fiber optic splice closure are available in hundreds of different designs and options. Some are designed for use in series connection of long distance cables, splicing two identical cables together. Some closures are designed to connect several smaller cables to a larger cable in order to branch the larger cable to multiple destinations. Fiber splice enclosure for FTTH pre-terminated cable (Plug and Play) may have connector mating adapters within the fiber splice enclosure to create a patch panel for factory-made drop cables. Fiber optic splice closure can be used for mid-span access where the cable jacket is stripped but most of the buffer tube is coiled inside without opening while one or more tubes are opened and splice the fiber to other cables.

fiber optic splice closure

Some fiber splice enclosure have all cables entering at one end, often called dome fiber optic splice closure or sometimes called butt boxes, while some have cable entries at both ends, sometimes called inline splice closure. Inline splice closure are used in applications where two identical cables are spliced, and it can save space or repair damaged cables. Dome splice closure with all cables entering one end are preferred because they are easier to handle when splicing and storing service loops, and the single-end seal is more reliable.

fiber optic splice closure

Some Fiber optic splice closure are designed to be buried in the ground, mounted on a wall, or hung from a cable or pole. Some are small pedestals themselves. Each type has specific applications, and probably a special fiber splice enclosure for each application. Special hardware may be required to handle different cable or connector types, so make sure you have the correct hardware before using a closure.

fiber optic splice closure

How to choose and use fiber optic splice closure

 All Fiber optic splice closure must be able to protect the connector and optical fiber from water damage. Some aerial or above-ground enclosures are free-breathing, while most below-ground enclosures are sealed to prevent moisture ingress. Sealing caps may need to be pressure tested.  Fiber splice enclosure must be properly secured, their location determined by the type of installation, and excess cable service loops must be properly coiled and stored. It may be located on a pedestal or vault, on a pole or tower, or buried in the ground. Some aerial fiber splice enclosure, particularly those used on power transmission towers, may have metal (or even bulletproof) covers for protection.

Select fiber optic splice closure the long-term survival of a network depends on the integrity of the splice box to protect the splices and cables at that location. Choosing a  fiber splice enclosure requires solving the problems of protecting the splices and mounting them, and choosing a design that technicians know how to use.

Here are some guidelines for selecting fiber optic splice closure.

Number of cables/fibers/connectors

The first thing to consider is how many cables and how many fibers you want to connect with connectors at the fiber optic splice closure.

Fiber optic splice closure position

Outdoor: aerial, underground or integrated into a base, Indoor: wall/rack mounted or integrated into a patch panel.

Special Needs

Many options including cable type (armoring requires grounding), adding other components such as splitters for PON networks, rigid ribbon cables requiring thicker splice trays, breakouts for FTTH drop connectors, etc.

Fiber optic splice closure Quality

Damage to robustness and sealing closures is a primary concern as moisture/water, dirt, etc. entering the closure can compromise the quality and longevity of cables, fibers, and connectors. Most Fiber optic splice closures are rated IP68 according to IEC 60529 or Telcordia GR-771-CORE

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