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Introduction of FTTH

DATE:2022-09-23   VISITS:86

An Introduction of FTTH Drop Cable by OPF China

 

  The drop cable is mainly used for fiber-to-the-home(usually called FTTH). It is mostly single-core or double-core structure, and can also be made into a four-core structure. With the domestic optical fiber access market showing a good momentum of development, optical fiber access has become a hot spot in the field of optical communications. 

Here please follow me to know more about what and how do we use FTTH Drop Cable.


What Are the Types of FTTH Drop Cable?

 

FTTH fiber drop are located on the subscriber end to connect the terminal of a distribution cable to a subscriber’s premises. The three most commonly used fiber drop cables include flat drop cable, aerial drop cable and round drop cable.

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1. Flat Type Drop Cable:

Flat drop cable, with a flat out-looking, usually consists of a polyethylene jacket, several fibers and two dielectric strength members to give high crush resistance. Fiber drop cable usually contains one or two fibers, however, drop cables with fiber counts up to 12 or more are also available now. 

 

2. Aerial Drop Cable:

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Aerial drop cable is self-supporting cable, with the cable fixed to a steel wire, designed for easy and economical aerial installation for outdoor applications. This type of fiber drop cable is fixed to a steel wire, Typical fiber counts of figure-8 drop cable are 2 to 48. Tensile load is typically 6000 Newtons.


3. Round Drop Cable:

Round drop cable usually contains a single bend-insensitive fiber buffered and surrounded by dielectric strength members and an outer jacket, which can provide durability and reliability in the drop segment of the network.

The dish-shaped drop cable for access network (for indoor wiring) is to place the optical communication unit (optical fiber) in the center, and place two parallel non-metallic reinforcing members (FRP) or metal reinforcing members on both sides. Finally, extrude black or color poly. It is sheathed with vinyl chloride (PVC) or low smoke halogen free material (LSZH, low smoke, halogen free, flame retardant).



Main Features of FTTH Drop Cable

1. Special low-bend-sensitivity fiber provides high bandwidth and excellent communication transmission property

2. Two parallel FRP strength members ensure good performance of crush resistance to protect the fibre

3. Single steel wire as the additional strength member ensures good performance of tensile strength

4. Simple structure , light weight and high practicability

5. Novel flute design , easily strip and splice , simplify the installation and maintenance

6. Low smoke , zero halogen and flame retardant sheath.

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The Difference Between Indoor and Outdoor FTTH Fiber Cables

Drop cables can be divided into indoor and outdoor fiber cable according to different use environments. Indoor FTTH optical cables are classified according to their usage environment, while outdoor FTTH optical cables are the opposite.

Indoor FTTH optical cable is a kind of cable formed by optical fiber (optical transmission carrier) through a certain process. It is mainly composed of optical fibers (glass filament as thin as hair) and plastic protective sleeve and plastic outer skin. There are no gold, silver, copper and aluminum in the optical cable, and there is generally no recycling value.


Outdoor: GJYXFCH

The optical fiber unit is positioned in the centre. Two parallel Fiber Reinforced Plastics (FRP)are placed at the two sides. A steel wire as the additional strength member is also applied. And the cable is completed with a black or color LSZH sheath.

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Characteristics:

Special low-bend-sensitivity fiber provides high bandwidth and excellent communication transmission property 

Two parallel strength members ensure good performance of crush resistance to protect the fiber.

Simple structure , light weight and high practicability. 

Novel flute design and spice me installation and maintenance 

Single steel wire as the additional strength member ensures good performance of tensile strength


Indoor: GJXFH/GJXH

The optical fiber unit is positioned in the centre . Two parallel Fiber Reinforced Plastics ( FRP ) are placed at the two sides. And the cable is completed with a black or color LSZH sheath.

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Characteristics: 

Special low-bend-sensitivity fiber provides high bandwidth and excellent communication transmission property.

Two parallel strength members ensure good performance of crush resistance to protect the fiber.

Simple structure, light weight and high practicability.

Novel flute design, easily strip and splice, simplify the installation and maintenance.

Constructions Precautions of FTTH Drop cable:

In the optical fiber access project, the indoor wiring close to the user is the most complicated link. The bending performance and tensile performance of conventional indoor optical cables can no longer meet the needs of FTTH (fiber-to-the-home) indoor drop cable.

There are several requirements that need to be paid attention to during the construction of the drop cable:



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1. The laying of the drop cable should be straight, without twisting and crossing, and should not be squeezed by external forces and damaged by operation. Power cords, household drop cables and cables for other weak current systems in the building should be laid out separately. If it cannot be satisfied, corresponding isolation protection measures must be taken. For steel wire reinforced leather cable, attention should be paid to grounding the metal parts in the junction box.


2. The laying of the drop cable should fully consider and strictly meet the requirements of "fire prevention, rodent prevention and extrusion prevention".


3.For important users or users with special requirements, protection should be considered, and different protection methods should be selected according to different situations.

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4. The two ends of the leather cable should have a unified mark, and the mark should indicate the position where the two ends are connected. Label writing should be clear, correct and correct. Labels should be made of materials that should not be damaged.


5. The bend of the leather cable should be even and smooth. The curvature radius of the ordinary G.652 fiber should be greater than 30mm, and the curvature radius of the anti-bending G.657 fiber should be greater than (A type) 10mm, (B type) 7.5mm , (C type) 5mm.


6. Normally, the traction force should not exceed 80 percent of the maximum allowable tension of the drop cable. The instantaneous maximum pulling force shall not exceed the maximum allowable tension of the leather cable 100N. The main traction force should be added to the cable strength member. After the cable is laid, the tension should be released to maintain a natural bending state.

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7. The drop cable reel should be used to carry the cable, and the cable tray should be used when laying the cable, so that the cable reel can automatically rotate to prevent the cable from being entangled.

 

8. During the laying process of the leather cable, the tensile strength and bending radius of the optical fiber should be strictly paid attention to, so as to avoid the optical fiber from being entangled, twisted, damaged and trampled.


One of the Most Commonly Used Equipment in the Use of FTTH Cable: FTTH Box

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The optical fiber distribution box developed and designed for different scenarios such as first-level or second-level optical splitting in FTTH construction is an important wiring device used in optical branch points. This product is used to connect the distribution optical cable with the user's FTTH optical cable through the optical splitter, so as to realize the opening of the user's FTTH service. It is an important optical access point device in the ODN network.


Product Features

1. The coupler and splicing disk are reasonably arranged in the box, and there are optical cable fixing plates and cable management rings for cable management.

2. The box is made of high-strength cold-rolled steel plate and welded frame design. The cable inlet and outlet are reserved at the upper and lower part of the indoor cabinet, and the cable inlet and outlet are reserved at the lower part of the outdoor cabinet, which is convenient for cable management.

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3. The box body is made of high-strength and high-quality cold-rolled steel plate, the front door adopts a single-opening mechanism, and the door panel is provided with protective rubber strips, which can effectively play a protective role.

4. The optical fiber distribution box has optical cable introduction, fixation and protection devices, which can protect the optical cable and the fiber core in the cable from damage, and realize the fusion and splitting of the optical cable.


Product advantages

1. There are various specifications such as fixed type and drawer type

2. Support the management of various optical fibers (such as: SC, LC, ST, MT-RJ, etc.)

3. Various connectors are easy to terminate and install flexibly

4. Up to 48-core LC or MT-RJ (24 dual-port LC or 24 MT-RJ) fiber optic connectors can be terminated in 1U space

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Product application range

Optical fiber distribution box (FTTH Box) is mainly used for the introduction of optical cables, the fusion and protection of optical fibers, the storage and management of fiber jumpers, the protection of fixing and stripping, the storage of pigtails, the fixed connection and cross-connection of optical fibers and other functions; not only It can install value-added module units such as wavelength division multiplexers and optical splitters according to customer requirements, and it can also be used for the termination, use and management of optical cables between wiring closets and equipment.


For more information about FTTH drop cable and FTTH Solutions, please send us email bella@o-pf.com. OPF team will be looking forward to hearing from you!

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