Leather wire cable for the single-core, dual-core structure, can also be made of four-core structure, cross-section was 8-shaped, reinforced in the center of the two rounds, metal or non-metallic structure can be used in the 8-shaped geometric center The Fiberhome's fiber optic cable with optical fiber G.657 small bending radius of fiber, can be bent with 20mm radius of the laying, suitable for the way to the pipeline or cloth line way home.
Patchwork cable commonly known as indoor hanging wiring cable.
In the domestic fiber access market has shown a good momentum of development, fiber access has become a hot spot in the field of optical communications. In the fiber access project, near the user's indoor wiring is the most complex part of the conventional indoor cable bending performance, tensile performance has been unable to meet the FTTH (fiber to the home) indoor wiring needs. Therefore, in 2002, by the flames of science and technology in accordance with market demand to develop a leather line cable, and applied for a national patent.
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The basic structure and characteristics of the fiber optic cable
The unique 8-shaped construction of the lace fiber optic cable can be realized in the shortest time. At present, Corning, 3M, Fujitsu can manufacture a variety of field connectors with 2.0mm × 3.1mm standard size leather cable adapter , And widely used in the world.
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Access network with the introduction of fiber optic cable (for indoor wiring)
product description
(For indoor wiring) is placed in the center of the optical communication unit (fiber), two parallel nonmetallic reinforcement (FRP) or metal reinforcement members are placed on both sides. Finally, the extruded black or colored poly Vinyl chloride (PVC) or low smoke halogen-free material (LSZH, low smoke, halogen-free, flame retardant) jacket. Hebei Hongxiang Telecommunications Equipment Co., Ltd. according to the national standard YD / T1997-2009 production of the leather line cable has the following characteristics.
Features?
Special bending-resistant fiber, providing greater bandwidth and enhanced network transmission performance;
Two parallel FRP or metal reinforcement to the cable has a good compression performance, protection of optical fiber;
Cable structure is simple, light weight, practical and strong;
Unique groove design, easy stripping, easy to connect, simplify installation and maintenance;
Low smoke zero halogen flame retardant polyethylene jacket or flame retardant PVC sheathed, environmental protection.
Can be matched with a variety of field connectors, can be on-site.
Applications?
For indoor wiring, the end user directly with the cable;
For the introduction of fiber optic cable;
FTTH users with indoor wiring.
Implementation of the standard YD / T1997-2009 access network with the introduction of fiber optic cable
Optical properties 50 / 125μm62.5 / 125μmG.652G.657
Attenuation @ 850nm
≤ 3.5 dB / km ≤ 3.5 dB / km
@ 1300nm
≤ 1.5 dB / km ≤ 1.5 dB / km
@ 1310nm
≤0.40 dB / km ≤ 0.40 dB / km
@ 1550nm
≤ 0.30 dB / km ≤ 0.30 dB / km
Bandwidth @ 850nm
≥ 600MHz · km ≥ 200MHz · km
@ 1300nm
≥1200MHz · km≥600MHz · km
Numerical aperture 0.200 ± 0.015NA0.275 ± 0.015NA
Cable cut-off wavelength ≤ 1260mm ≤ 1260mm
Structural parameters
Fiber optic cable
Model fiber
Number of cores
(Mm) Cable weight (kg / km) Allowable tensile force (N) Allowable flattening force (N / 100mm)
Long term short term short term
GJXV1-2 (2 × 3) ± 0.110.510020010002200
GJXDV4 (2 × 4) ± 0.213.510020010002200
GJXH1-2 (2 × 3) ± 0.110.510020010002200
GJXDH4 (2 × 4) ± 0.213.510020010002200
GJXFV1-2 (2 × 3) ± 0.19.540805001000
GJXFDV4 (2 x 4) ± 0.212.040805001000
GJXFH1-2 (2 × 3) ± 0.19.540805001000
GJXFDH4 (2 × 4) ± 0.212.040805001000
Storage, use temperature: -20 ℃ to +60 ℃
Cable bending radius
Fiber class static (working) dynamic (when laying)
B1.1 and B1.33060
B6a1530
B6b1025
Ordering information
1, cable type 2, reinforcement 3, jacket material 4, the number of optical fiber 5, fiber type
GJX-disc-shaped fiber optic cable F-non-metallic reinforced V-PVC sheathed
Digital representation
B1.1-G.652B unsigned - metal reinforcement
H - low smoke zero halogen flame retardant polyolefin sheathed
B1.3-G.652D
B6a-G.657A
B6b-G.657B
Delivery length
Recommended length: 2000m or 3000m / per roll; other lengths available upon request.
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The characteristics and structure of the fiber optic cable
Features:
1, the leather line cable because of the soft, light and other characteristics; make it in the access network is widely used; fiber optic cable scientific name: access network with butterfly into the cable; because of its shape was butterfly shape; so there are people called butterfly Fiber optic cable, 8 word cable.
usage:
2, currently mainly used for FTTH households segment;
structure:
Ordinary leather wire cable for the standard 8-shaped structure; two parallel reinforcement core, the middle of the fiber; self-supporting leather line cable in the ordinary leather cable structure of the increase in a thick wire hanging line; Overall self- Line cable is more than a wire only, the other did not change;
The structure of each cable is different. But generally not a metal to strengthen the core, with butterfly leather cable as an example
Section shape like a butterfly, so called. Both sides of the leather line for the reinforcement, the middle of the fiber.
1, butterfly cable sub-room, room (inside) outside the two, the price difference between the two large, at present, the outdoor price is about 2 times the indoor price, in the specific design should be considered when the price factor, the general situation , The outside is still using ordinary fiber optic cable (GYTA-G652D), indoor indoor type butterfly cable, both through the sub-fiber box or splice box transition
2, butterfly cable has a smaller radius of curvature, light weight, relatively good anti-bending performance and easy to fix, in the 86 terminal box easy to terminate and so on,
3, butterfly home cable has non-metallic reinforced components, metal reinforced components in two forms, taking into account the lightning protection, anti-strong interference factors, indoor use should be non-metallic reinforced components butterfly cable.
4, the current indoor type butterfly cable with 1 core, 2 core, 3 core, 4 core and other specifications, residential users access butterfly home cable should choose a single core cable; business users access butterfly cable can be 2 - 4 core design.
Connection has cold connection and welding.
The cold connection is done by preparing the fiber end and attaching the wire to the flange head
Welding would not have said more.
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Construction method of leather wire and cable
1, leather line cable (also known as butterfly cable):
In the domestic fiber access market has shown a good momentum of development, fiber access has become a hot spot in the field of optical communications. In the fiber access project, near the user's indoor wiring is the most complex part of the conventional indoor cable bending performance, tensile performance has been unable to meet the FTTH (fiber to the home) indoor wiring needs.
Leather wire cable for the single-core, dual-core structure, can also be made of four-core structure, cross-section was 8-shaped, reinforced in the center of the two rounds, metal or non-metallic structure can be used in the 8-shaped geometric center The Fiber optic cable within the fiber using G.657 small bending radius of the fiber, can be bent with 20mm radius of the laying, suitable for the way to the pipeline or cloth line way home. The unique 8-shaped construction of the lace fiber optic cable can be realized in the shortest time. At present, Corning, 3M, Fujitsu can manufacture a variety of field connectors with 2.0mm × 3.1mm standard size leather cable adapter The
2, FTTX common construction methods
FTTX project in the current large-scale use of leather wire and cable, mainly using two kinds of connection: one is the cold junction-based fiber optic cable cooling technology (physical connection), a welding machine as a tool for the hot melt technology The
Cold connection technology: fiber cold connector is used when the two pigtail butt, and its main component is a precision v-groove, in the two pigtail fiber after the use of cold joints to achieve the two pigtail docking. It is easier to operate and faster than welding with a welding machine.
On the surface, the cold connection operation is simple and fast, saving time than the welding machine hot melt, but the current cold connection technology is also mainly used in cable communication after the emergency application.
Cold connection technology there are obvious defects:
(1), cold junction loss. As a result of the physical connection, the two fibers completely rely on V-groove and matching fluid to achieve the connection, this loss is significantly greater than the hot melt connection point. In the FTTX project, although the requirements for the loss of the line without strict requirements, but the large loss point is the potential point of failure, if the loss of large,
(2), short service life, high maintenance costs. In the cold connection technique, the effect of the matching solution is important. Citing the statistics of the customer's customer statistics, the import matching liquid, the general life will be about 3 years, and the domestic match solution, life is only 1.5 to 2 years. This increases the cost of maintenance. And the cost of a cold junction is generally about 30 to 50 yuan (removable re-use, but after the demolition of the precision greatly reduced, so the cold joint is repeatable, the actual construction process are Only once), the actual use of high maintenance costs.
Advantages of hot melt technology:
(1), welding loss is small. Two fiber using hot melt technology, according to the trunk line to carry out the welding, greatly reducing the welding loss.
(2), long service life, low maintenance costs. As the hot melt standard in accordance with the requirements of the trunk construction, the general life of the welding point and ordinary fiber optic cable life is almost the same, there is no single point of life problems.
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The way the cable is installed
1, the user indoor wiring
In the FTTH project, the user indoor wiring is the most complex link, consider more factors. It is necessary to ensure the safety of the line, but also take into account the indoor appearance, but also to facilitate the construction, the traditional single-core indoor cable has been unable to meet the current stage of FTTH indoor wiring requirements. As a substitute for traditional indoor cable, Wipo Pimp Cable can be adapted to most indoor wiring conditions, for example, to bend at a bending radius of 20mm, to allow people to step on the side of the cable above the pressure, and the construction drag pull. At the same time, with a variety of field connectors, in the shortest possible time to achieve on-site end, docking. Therefore, the power supply is the best choice for FTTH indoor wiring.
2, vertical vertical wiring floor
As with the user's indoor wiring, the power supply cable is also suitable for vertical horizontal wiring in the building. Horizontal cabling requirements for the cable is not very harsh, but the vertical wiring must require the cable with a certain strength of the tensile properties. Weibu Pimp line cable can withstand short-term 200 Newton, long-term 100 Newton's pull, so you can ensure that a certain height range, the vertical processing of leather cable cable and safety and stability.
3, self-supporting overhead home wiring
Self-supporting "8" word wiring cable with a metal hanging line unit, so the tensile performance is stronger, can withstand 50 meters span. The cable is laid out in the outdoors, and the metal hanging line unit is cut and fixed on the special fixing device. The remaining cable is stripped of the metal wire and then introduced into the room with the leather cable.
4, pipe home wiring
As the pipeline mapping cable compared to the leather line cable harder, higher tensile strength, while the cable containing water-blocking material, can reduce the outdoor rain erosion, so more suitable for longer-distance outdoor pipeline laying. Wei Pu hearing pipe mapping fiber optic cable with all non-metallic structure, thus avoiding the mine into the room. After the cable entry, stripping its outer protective layer, water blocking materials and reinforcement, directly with the middle of the leather cable for indoor wiring, inherited all the advantages of the cabling line cabling, while reducing the outdoor indoor cable connection.