Supply of 144-core optical cable transfer box

& Reference Standards
b / The Communications Industry Standard of the People's Republic of China "Optical Fiber Distribution Frame"
b / The Communications Industry Standard of the People's Republic of China "Communications Optical Cable Handover Box"
b / The Communications Industry of the People's Republic of China Standard "Optical Cable Terminal Box"
b / Communications Industry Standard of the People's Republic of China "Optical Cable Distribution Box"
Related Definitions
Glossary
b Optical Fiber Distribution Box (bb b (DB )): Interface equipment used to connect trunk optical cables and distribution optical cables outdoors or in corridors.
b Patch fiber (b): An optical cable with optical fiber connector plugs at both ends.
b Pigtail (&): A fiber optic cable with a fiber optic connector plug on one end.
b Adapter: A device that enables optical connection between plugs.
b Optical fiber connection distribution device (br rb): It is assembled from an adapter, an adapter card holder, a mounting plate or an adapter and an adapter mounting plate, for pigtails and jumpers or two jumpers to be inserted into the outer side of the adapter and A component that completes the movable connection on the inner side.
b Optical fiber termination device (br r): A component that connects the core wire of the optical cable to the pigtail and coils the optical fiber.
b Optical fiber storage device (br r): a component that retains pigtails or fiber jumpers.
b Fusion protection sleeve (rb br): a material or component that provides protection for optical fiber fusion splices.
. Unit abbreviation
b ℃: temperature unit, degrees Celsius
b: area unit, square millimeter
b B: attenuation measurement unit, decibel
b resistance unit, megabytes Ohm
b Power unit, milliwatt
b: Weight unit, Newton
bh: Time unit, hour
b Time unit, minute
b: Time unit, second
b Time unit, milliseconds
b Length unit, micron
b: Voltage unit, volt
b: Area unit, square meter
b: Atmospheric pressure unit, thousands Pascal
Composition, classification and naming
Composition
b Optical fiber distribution box consists of a box body, internal structural parts, optical fiber movable connectors and spare parts.
. Classification
b Generally, optical fiber distribution boxes can be classified in the following ways
b According to the use environment, they can be divided into outdoor type and indoor type.
b According to the installation method, it can be divided into floor-standing, overhead or wall-mounted installation.
b According to the shell material classification, it can be divided into plastic shell and metal shell.
b See the table for classification codes.
b table & classification code
bbb classification
b code
b usage environment
b outdoor indoor
b
b
b Wall-mounted
b B
b
b Metal shell
b
Requirements
Conditions of use
b Operating temperature: Outdoor type: ℃～+ ℃Indoor type: ℃～+℃
b Relative humidity: &% (+℃).
Appearance and structure
. Dimensions
b On the premise of meeting the functional requirements, the optical fiber splitter box should strive to be miniaturized, that is, small and thin. The box should be installed in harmony with the environment. It should not affect vision.
. Appearance
b.. The color of the cabinet should be unified and should comply with the requirements in the table in the "Paint Film Color Standard".
b.. The shape of the fiber distribution box should be complete, and each plastic part should have no burrs, bubbles, cracks, holes, warpage, impurities and other defects.
b.. The surface of each metal structural part is smooth and uniform in color. There are no defects such as peeling, peeling paint, rust, etc., and there are no phenomena such as sags, scratches, bottom exposure, bubbles, and whitening.
b.. For metal structural parts that are coated, the coating and the substrate should have good adhesion, and the adhesion should not be lower than the "Cross-Hatch Test of Paint and Varnish Films" Standard Table & & level requirements.
b.. The high-voltage protective grounding device is connected to the metal reinforcement core, metal moisture barrier layer and armor layer in the optical cable. The cross-sectional area of the ground wire should be no less than 1. There should be obvious grounding signs at the protective grounding point.
b..The equipment should have clear fiber serial markings.
. Structure
b All fastener connections should be firm and reliable.
b The door opening angle is not less than&rd.
b The sealing strip of the box should be bonded smoothly and firmly, and the opening and closing of the door lock should be flexible and reliable.
b The outdoor type optical fiber distribution box should adopt the bottom cable entry method. The indoor type can have both upper and lower cable entries, and construction should be carried out without cutting the optical cable.
b When the optical cable is introduced, its bending radius should be greater than & times the diameter of the optical cable.
b When the optical fiber is laid out in the equipment, no matter where it turns, its bending radius should be no less than that of the optical fiber. For bending loss-insensitive single-mode optical fiber, the bending radius can be implemented according to the requirements of the optical fiber.
Functional requirements
. Fixation and protection functions of optical cables
b When the optical cable is introduced into the fiber distribution box, there should be reliable fixing and protection devices. The fixed optical cable metal moisture-proof layer and armor layer And the reinforcing core should be reliably connected to the high-voltage protective grounding device. After the optical cable is stripped, a plastic sleeve or spiral tube should be used to protect and fix the introduction of the optical fiber fusion splicing device.
b When the fiber distribution box can enter and exit optical cables up and down, the upper and lower fixing and protection devices should be located on the same side of the box, and the fixing devices should be flexible and can be replaced and installed according to the actual situation of the project.
. Termination function of optical fiber core
b The optical fiber termination device of the equipment should facilitate the splicing, installation and maintenance of optical fiber and optical fiber or pigtail. At the same time, the equipment should have the ability to coil the optical fiber cable. of storage space.
. Optical fiber connection protection function
b The connection between optical fiber and optical fiber should be located in the optical fiber splice tray, and the connection part should be protected. Protection measures can use heat-shrinkable optical fiber protection tubes, protective clips, optical fiber cold joints, etc.
b The minimum capacity of each optical fiber splicing tray is core, and its configuration quantity is determined by the number of optical fiber splicing cores.
. Line adjustment function
b The optical fiber splitter box should be able to quickly and easily schedule the optical fiber serial numbers in the optical cable and change the routing of the transmission system. However, optical fiber jumpers must not be used for optical fiber scheduling. The pigtail and the pigtail in the downlink optical cable should be directly connected through an adapter.
Core fiber optic cable transfer box pole type core fiber optic box plug-in optical splitter