(1) Inspection before construction
1. Before the installation work, the construction and environmental conditions of the equipment room must be checked to meet the following conditions:
(1) The civil works between the equipments have been completed and the indoor walls have been fully dried. The height and width of the door between the equipment shall not impede the handling of the equipment, and the door lock and key are complete;
(2) The floor between the equipment should be smooth and clean, and the number, location and size of the hidden pipes, troughs and holes should be in accordance with the process design requirements;
(3) The power supply has been connected to the equipment room and should meet the construction needs;
(4) The ventilation ducts between the equipment should be cleaned, the air conditioning equipment should be installed and the performance is good;
(5) In the equipment room where the raised floor is laid, special inspection should be carried out on the raised floor. The floor plate should be laid tightly and rigorously. It should meet the installation requirements. The error per square meter should be no more than 2mm. The floor should be well grounded. The grounding resistance and anti-static measures should be Meet the requirements.
2. Intersection environment requirements
(1) According to the design specifications and engineering requirements, the floor and junction of the vertical passage of the building should be arranged, and the building and environmental conditions should be checked.
(2) The vertical channel cable hole in the junction should be reserved, and the horizontal channel pipe or cable tray and environmental conditions should be checked.
3. Equipment inspection requirements (omitted)
4. Safety requirements (omitted)
5. Technical preparation (omitted)
(II) Construction of twisted pair transmission channel 1. Laying of metal pipe
(1) Metal pipe requirements
The metal pipe shall comply with the provisions of the design documents. The surface shall be free of perforations, cracks and obvious irregularities. The inner wall shall be smooth and no rust shall be allowed. Pipes of sufficient strength should be used where they are susceptible to mechanical damage and when buried directly under heavy loads.
(2) Cutting of the metal pipe
When piping, the tube is cut according to the actual length required. For the cutting of pipes, hacksaws, pipe cutters or electric pipe cutters can be used. Gas cutting is strictly prohibited.
The pipe and the pipe are connected, and the pipe and the junction box and the wiring box are connected, and the end of the pipe is required to be threaded. When tying the wire, first fix the tube on the pipe wrench, then in the ferrule, immediately clean the pipe mouth after the sleeve is finished, and smash the burrs on the end face and the inner wall of the nozzle to keep the nozzle smooth.
(3) bending of the metal pipe
When laying, the elbow should be minimized. The elbow of each tube should not exceed 3, and the right angle elbow should not exceed 2, and there should be no S-bend.
The bending of the metal pipe is generally carried out using a bent pipe. First place the front section of the tube where the bend is required in the bender, and place the weld on the back or side of the bend to prevent the tube from being bent and then step on it with your foot.
Pipes, hand benders, you can get the required camber.
The pipe of the concealed pipe shall be smooth and shall be provided with an insulating sleeve, and the protruding portion of the nozzle shall be 25-30 mm.
(4) Connection of metal pipes
The metal pipe connection should be secure, the seal should be good, and the two pipe connections should be aligned. The length of the sleeved short sleeve or threaded fitting shall not be less than 2.2 times the outer diameter of the metal tube. When the metal pipe is connected by short sleeve, the construction is simple and convenient; the pipe joint thread connection is more beautiful, and the strength of the metal pipe after connection can be ensured.
After the metal tube enters the junction box of the information socket, the buried tube can be fixed by welding, and the exposed length of the tube into the box should be less than 5 mm. The tube is fixed with a lock nut or a threaded cap, and the thread of the lock nut is 2-4.
(5) Laying of metal pipes
a. The concealment of metal pipes shall comply with the following requirements:
* The inner diameter of the metal pipe embedded in the middle of the wall should not exceed 50mm, the pipe diameter in the floor should be 15-25mm, and the dark wire box should be set at 30mm.
* Metal pipes laid in concrete and concrete. Other foundations should be solid, flat and should not be sunken to ensure the safe operation of the cables after laying.
* When the metal pipe is connected, the pipe hole should be aligned, the joint should be tight, and no cement or mortar should be infiltrated. The tube holes are aligned and have no misalignment, so as to avoid affecting the effective management of the tubes, wires and slots, and ensuring smooth installation when laying cables.
* Metal pipes should have a drainage gradient of not less than 0.1%.
* The buried depth of the metal pipe between the buildings should not be less than 0.7m; when laying under the sidewalk, it should not be less than 0.5m.
* Pull wire or pull wire should be placed in the metal pipe.
* Both ends of the metal pipe should be marked to indicate the building, floor, room and length.
b. When the optical cable and the cable are laid in the same tube, the plastic sub-tube should be preset in the metal tube. The optical cable is laid in the sub-tube so that the optical cable and the cable are laid separately, and the inner diameter of the sub-tube should be 2.5 times the outer diameter of the optical cable.
2. Laying of metal trunking
(1) Trunking installation requirements
* The installation position of the cable trough should conform to the construction drawing regulations, and the left and right deviations depend on the environment, and the maximum should not exceed 50mm;
* The deviation of the trough level should not exceed 2mm per meter;
* The vertical trough should be perpendicular to the ground without tilting, and the vertical deviation should not exceed 3mm;
* The cable trough section and the inter-section joint are spliced and the screws should be tightened. The horizontal deviation of the joint of the two line slots shall not exceed 2 mm;
* When the straight section bridge exceeds 30m or spans the building, there should be expansion joints. The connection should be a telescopic connecting plate;
* The turn radius of the slot should not be less than the maximum allowable bend radius of the cable in its slot.
* The cover should be fastened.
* Support hangers should be vertical, neat and secure, without skewing.
(2) Horizontal subsystem cable laying support protection
Pre-embedded metal trunking support protection requirements:
a. The pre-embedded wire troughs in the building can be of different sizes. Set in one or two layers, at least two or more should be buried in advance, and the height of the trough section should not exceed 25 mm;
b. If the length of the line slot is more than 15m or the line slot is routed*, the cable box should be set when turning, so that it can be maintained when the cable box is laid.
c. The cable cover should be open and flush with the floor. The cover should be open and waterproof.
d. The wire trough should be introduced into the junction box by a metal tube.
Set the slot support protection:
a. When laying horizontally, the support spacing is generally 1.5-3m, and the spacing fixed on the building structure during vertical laying should be less than 2m;
b. When laying the metal trunking, set the bracket or hanger in the following cases: cable joint, spacing 3m, 0.5m away from the two slots of the trunking, change of the trunking direction or turning.
When laying cables under the raised floor, the clearance in the raised floor should not be less than 150mm. If the floor is used as a duct for the ventilation system, the net height in the floor should not be less than 300mm.
When the information point location of the work area and the cable laying method are not fixed, or when the cable is laid under the carpet in the work area, the transfer box should be set in the work area.
(3) Trunk subsystem cable laying support protection
Cables must not be placed in elevators or pipeline shafts.
Communication should be made between trunk channels.
In the weak room, the cable passing through each floor of the floor should be square or round.
The cable laying support protection of the building group subsystem should meet the design requirements.
3. Installation of wiring equipment
(1) Rack mounting requirements
a. After the rack is installed, the horizontal and vertical dimensions should conform to the manufacturer's specifications. If there is no manufacturer's regulation, the vertical deviation shall not exceed 3mm;
b. The various parts on the rack must not fall off or be damaged. The various signs should be complete and clear.
c. The installation of the frame should be firm and should be reinforced according to the seismic requirements of the construction.
d. Install the rack panel, leaving 0.6m space in front of the rack. The distance from the back of the rack to the wall depends on its model, which is convenient for installation and maintenance.
(2) Patch panel installation requirements
a. When using the lower wiring mode, the bottom position should correspond to the cable upper hole;
b. The vertical vertical tilt error of each line shall not exceed 3mm, and the horizontal error of the base shall be no more than 2mm per square meter;
c. The various markings of the terminal block should be complete;
d. The transfer box or the dark box should be located in the wall. The grounding body of the mounting frame and wiring equipment should meet the design requirements and maintain a good electrical connection.
(3) Twisted pair cable routing
1. Wiring safety
Personnel participating in the construction shall observe the following points:
* Wear appropriate clothing;
* Use safe tools;
* Guarantee the safety of the work area;
* Develop construction safety measures.
2. General requirements for cable deployment
(1) Check whether the specifications, procedures, routing and location are in accordance with the design regulations before laying the cable;
(2) The cable to be laid shall be straight and shall not cause twisting, ringing, etc., and shall not be crushed or damaged by external force;
(3) Before laying, the two ends of the cable should be labeled with the label indicating the starting and ending positions and the information points. The label should be clear, correct and correct.
(4) Signal cables, power cables, twisted-pair cables, optical cables, and other weak electrical cables in buildings should be placed separately.
(5) The cable should be redundant. The reserved length of the twisted pair cable between the secondary handover and the equipment is generally 3-6m, and the working area is 0.3-0.6m. Special requirements should be reserved according to design requirements.
(6) Deploy the cable, and the fulcrum of the hanging cable should not be more than 1.5m apart during the traction process.
(7) In order to avoid stress and distortion during cable deployment, qualified traction ends should be made. If mechanical traction is used, centralized traction or dispersive traction should be selected according to factors such as cable deployment environment, length of traction, and traction tension. 3. Release line
(1) Pull the cable from the cable box:
a. Remove the plastic plug;
b. Pull out a few meters of cable through the outlet hole;
c. Pull out the cable of the required length, cut it, and slide the cable back into the slot, leaving a few centimeters to stick out;
d. Plug the plug back in to secure the cable.
(2) Cable handling (stripping):
a. Use a diagonal pliers to cut a "1" long slit on the plastic outer garment;
b. Find the rope of nylon;
c. Hold the cable in one hand, clamp the end of the nylon cord with a needle-nose pliers, and pull it away from the end of the cable. The length of the pull is as needed;
d. Cut off the useless cable jacket. (Another method is to use a ring cutter to strip the cable.)
4. Cable traction
Pulling a cable through a cable to a wall pipe, ceiling, and floor pipe is called cable pulling. During the construction, the connection point of the cable and the cable should be as smooth as possible, so the electrical tape should be tightly wound around the connection point to ensure smoothness and firmness.
(1) Traction of four pairs of twisted pairs:
* Gather multiple cables into one bundle and align their ends;
* Use electrical tape to wrap around the cable bundle and wind 5-6cm outside the end;
* Pass the drawstring through the electrician with the wrapped cable and tie the knot.
(2) If the connection point is scattered during the cable pulling process, the cable and cable should be reclaimed to make a more secure fixed connection:
* Remove some insulation layer to expose 5cm bare wire;
* Divide the bare wire into two;
* Winding two bundles of wires to form a loop;
* Pass the drawstring through the loop and tie it, then wrap the harness around the joint to make it strong and smooth.
(3) Traction multiple 25 pairs of twisted pairs
* Strip the cable jacket of about 30cm, including the insulating layer on the wire;
* Cut the wire with a diagonal pliers, leaving about 12 pieces;
* Divide the wire into two stranded groups;
* Cross the two sets of strands through the pull wire to create a loop on the cable side;
* Wrap the wires at one end of the twisted pair together to close the ring;
* Wrap the electrician strap around the cable tightly, cover about 5cm in length, and then continue to wrap up the section.
5. Building horizontal cable routing
(1) Pipe wiring
The pipeline wiring is pre-buried in the floor when pouring concrete. The steel wire or iron wire of the traction cable is used in the pipeline. The construction plan can be made only by understanding the floor pipe through the pipeline drawing during construction.
For new buildings without pre-buried pipes, wiring construction can be synchronized with the building decoration, which is convenient for wiring without affecting the aesthetics of the building.
The pipe is generally buried from the wiring closet to the information socket mounting hole. When the twisted pair wire is fixed at the terminal of the information socket during construction, the cable can be led to the wiring closet by pulling the cable from the other end of the pipe.
(2) Wiring inside the ceiling
a. Request construction drawings and determine routing routes;
b. Along the designed route (ie in the cable tray body), open the ceiling and push each panel with both hands;
c. Discharge multiple cable boxes together and make the outlets upward;
d. Marked, the carton can be directly marked, the label of the cable is written at the end of the cable, and the label is attached;
e. Connecting a suitable length of traction wire to a coil;
f. Starting from the farthest end from the wiring closet, pull the ends of the cables (bundled together) along the cable tray through the end of the ceiling corridor;
g. Move the ladder to pull the cable to the next hole in the ceiling until the rope reaches the end of the corridor;
h. Pull out the cables in each of the 2 boxes to form a "pair" and bundle them with tape;
i. Pass the drawstring through three pairs of cables wrapped with tape, form a loop, and tie the three pairs of cables to the rope with a strap;
j. Go back to the other end of the drawstring and pull the rope manually. All 6 cables (3 pairs) will be automatically pulled out of the cable box and pulled through the cable tray to the wiring closet;
k. Repeat the operation of step "h" for the next set of cables (additional 3 pairs);
l. Continue to add the remaining cable sets to the drawstring, pulling them forward each time until the end of the corridor, and then continue to pull the cables until they reach the wiring closet.
When the cable is finished in the ceiling, the cable should be led down to the information socket mounting hole through the wall or wall post pipe. Twist the twisted pair into a tight group and feed the end into a PVC round tube embedded in the wall and press it down until it is exposed to the hole of the socket by 25-30 mm.
6. Building vertical trunk cable routing
The system uses indoor multimode fiber as the main carrier of the vertical trunk. The vertical trunk of the fiber can be referred to the "fiber transmission pipeline laying".
7. Management subsystem
The management subsystem consists of floor distribution frames. Its main function is to connect the vertical trunk cable to the horizontal wiring subsystem of each floor. The advantages and flexibility of the cabling system are mainly reflected in the management subsystem. Simply jump the line to complete the information socket of any structured cabling system to connect any kind of intelligent system, which greatly facilitates the re-layout of the line. And adjustment of the network terminal. When the fiber is connected, the fiber connection box (LIU) is used. There may be multiple ST connector mounting holes in the box. The circuit bending design in the box box should meet the bending requirements of the 62.5/125 micron multimode fiber. The connector is made of STII, made of ceramic material, and the maximum signal attenuation is less than 0.2dB. The optocoupler can be used as a connection between multimode fiber and network equipment or fiber optic splice. The patch panel and fiber optic splice box are usually located in weak electric wells or In the equipment room, it is used to connect other subsystems and manage them through jumpers.
8. Equipment room subsystem
The equipment room subsystem consists of a main distribution frame and various public devices. Its main function is to connect various public devices (such as computer mainframes, digital program-controlled switches, various control systems, network interconnection devices) to the main distribution frame. The subsystem also includes electrical protection devices and the like.
9. Building group to the connection subsystem
This subsystem refers to the connection system of the main distribution frame in the main building that extends to the main distribution frame of other buildings. Similar to the vertical subsystem, it is usually connected by fiber optic cable or large logarithmic copper cable. It is part of the entire cabling system (including the transmission medium) and supports the hardware needed to provide communication between the buildings, including cables,
1. Termination of super five modular wiring boards
Firstly, the wiring board is fixed in order on the vertical rails of the standard cabinet, and tightened with screws. Each wiring board needs to be equipped with a 19U wiring management rack.
(1) Before wiring the terminal, first arrange the cable. Wrap the cable around the lead-in edge of the patch panel with a strap, preferably by wrapping the cable around the hanger of the vertical channel, which will ensure that the pair is not deformed during cable movement.
(2) Pass the cable from right to left and terminate the cable in the order of the numbers on the back;
(3) For each cable, cut off the outer skin of the required length for the termination of the pair;
(4) For each set of connecting blocks, set the cable through the end of the retainer (or tie with a tie), which makes the pair do not deform when the cable moves;
(5) When bending the pair, maintain proper tension to prevent damage to individual pairs;
(6) The confrontation must be correctly placed at the separation point of the connection block. This is important to ensure the transmission performance of the cable;
(7) Start to put the pairs in order on the index bar on the back of the wiring board. The color codes from right to left are purple, purple/white, orange, orange/white, green, green/white, blue. Blue/white
(8) Use your finger to gently press the pair into the clip of the index bar. Use the wire-punching tool to press the wire pair into the wiring module and cut the protruding wire head, and then use the tapered hook to remove the cut wire end.
(9) Insert the tag into the wiring module to indicate this area.
2. Termination of the patch panel
(1) The 24 lines to be terminated on the first 110 distribution frame are pulled into place, and 6 twisted pairs are placed in each wiring slot. The cable on the left is terminated in the left half of the patch panel, and the cable on the right is terminated in the right half of the panel.
(2) Bundle the slack cables at the inner edge of the wiring board to ensure that the single cable does not slip out of the wiring board slot to avoid slack and irregularity of the cable bundle.
(3) Mark the position of a new line on each cable at the edge of the panel. This facilitates the next step of accurately stripping the outer jacket of the cable at the edge of the wiring board.
(4) Disassemble the cable bundle and hold it tightly, scratch the mark on each cable, and then put the well-entered cable harness back to prepare for the 110 wiring board.
(5) When all the 4 harnesses are well-marked and put back in place, install the 110 patch panels with screws and start the termination (starting from the first cable);
(6) Cut the cable at least 15 cm outside the score and slide the notched jacket off;
(7) Pull the "4" pair of wires into the front slot along the edge of the 110 patch panel;
(8) Tighten and bend each pair of wires into the position of the index bar, separate the pair of wires with the high teeth on the index bar, and provide appropriate pressure at the final bend of the index bar to minimize the deformation of the pair. .
(9) When the pair of the above two index bars are placed and placed in place and cut, the pair of the following two index bars are placed. After all four index bars are in place, install the 110 connection module.
3. Information outlet termination
(1) Installation requirements:
The information outlet should be securely mounted in a flat place with a cover on the outside. Information outlets installed on the raised floor or on the ground should be secured in the junction box. The socket panel has the form of upright and horizontal; the junction box has an opening and should be dustproof.
The socket installed on the wall should be 30cm above the ground. If the floor is raised, the net height in the raised floor should be added. The fixing screws need to be tightened and there should be no looseness.
The information outlet should have a label indicating the type of terminal equipment connected in color, graphics, and text. This system uses TIA/EIA 568A standard wiring.
(2) Information module termination
The information outlet is divided into single and double holes, each with an 8-bit/8-way pin. The high performance, small size and modularity of this socket provide flexibility in the design of integrated wiring. It uses terminals that are marked with a variety of different color cables to ensure fast and accurate installation.
a. Pull the twisted pair cable out of the information socket bottom box hole about 20-30cm;
b. Strip the 10 cm outer sheath from the twisted pair cable with a loop cutter or diagonal pliers;
c. Take out the information module and press the pair of cables of the twisted pair into the appropriate slots according to the color code of the module;
d. Use a wire-punching tool to press the cable into the slot and cut off the remaining cable;
e. Snap the created information module into the information panel, pay attention to the up and down direction of the module;
f. Place the panel with the information module on the wall and screw it to the bottom box;
g. Label the information outlet with the type and serial number of the terminal.
(5) Construction of optical fiber transmission channel
1. Basic knowledge of optical cable construction
(1) Operating procedures
* When making fiber optic connections or making fiber optic connectors, the builder must wear eye and gloves and wear overalls to keep the environment clean.
* It is not allowed to view the energized light source, fiber and its connectors, and it is not allowed to view the powered fiber transmission channel device with optical instruments;
* Maintenance of the fiber optic transmission system is only possible with all light sources disconnected.
(2) Fiber cabling process
First of all, the core of the fiber is quartz glass, which is extremely easy to break, so it is never allowed to exceed the minimum bending radius during construction bending. Secondly, the tensile strength of the optical fiber is smaller than that of the cable, so it is not allowed to exceed the tensile strength of various types of optical cables when operating the optical cable. After the cable is laid, the cables are bundled together between the equipment and the floor wiring, and then the fiber connection is made. Can use light
Fiber terminations (OUT), fiber couplers, fiber optic connector panels to create modular connections. Once the radiant cable has been serviced and the fiber optic interconnects and the interconnect module is established in place, the fiber optic connector can be applied to the fiber end and a fiber optic connection can be established. Finally, the performance test is used to verify the effectiveness of the overall channel and to label all connections.
2. Construction preparation
(1) Inspection requirements for optical cables
* The specifications, models and quantities of optical cables used in the project shall comply with the design requirements and contract requirements;
* The markings and labels of the optical fiber should be complete and clear;
* The outer sheath of the optical cable shall be intact, and the optical cable shall have a certificate of quality inspection;
* After the cable is opened, check the appearance of the cable without damage, and whether the cable end package is good;
* Fiber patch cord inspection shall comply with the following provisions: with a fire-protected fiber optic protective cover, the end of the movable connector at both ends shall be fitted with a suitable protective cap; the fiber type of each fiber patch cord shall be clearly marked and shall comply with Design requirements.
(2) The requirements for the use of wiring equipment
* The model and specifications of the cable transfer equipment should meet the design requirements;
* The layout and marking name of the cable transfer equipment should be consistent with the design. The names of all kinds of marks should be uniform, and the mark position should be correct and clear.
3. Cable cabling requirements
The laying optical cable shall be straight and shall not cause twisting, ringing, etc., and shall not be crushed or damaged by external force. Before the cable is laid, its ends should be labeled to indicate the starting and ending positions. Label should
Writing is clear, correct and correct. It is best to lay the cable in a straight line. If there is a bend, the bending radius of the cable should be at least 10 times the outer diameter of the cable when it is at rest, and should be at least 20 times during the construction process.
4. Cable laying
(1) Vertical laying through weak electric wells
There are two options for laying fiber optic cables in weak wells: up and down.
It is usually easier to hang down than to pull upwards, so when you are ready to lay down the cable, you should follow these steps:
* Place the cable reel at 1-1.5m from the slot between the top equipment of the building so that the reel can control the cable as it rotates. The cable spool is placed on the platform so that the cable is perpendicular to the spool axis at all times, the spool is placed with the end of the cable at its top, and the cable is then pulled from the top of the spool.
* Rotate the cable spool and pull the cable out of its top. When pulling the cable, keep the specification of the minimum bending radius and maximum tension.
* Guide the fiber optic cable into the laid cable tray.
* Slowly pull the cable from the cable reel until the next level of construction personnel can receive the cable and introduce it to the next layer. Repeat the above steps on each floor. When the cable reaches the bottom layer, make the cable loose on the ground. When laying the fiber optic cable between weak cells, in order to reduce the load on the cable, the cable should be fastened to the wall at a certain interval (such as 5.5m). In this way, the cable does not require intermediate support, but be careful to bundle the cable without breaking the fiber. In order to avoid breaking the fiber and generating additional transmission loss, do not break the cable protection when tying the cable.
The steps for fixing the cable are as follows:
* Use a plastic cable tie, starting from the top of the cable, and fasten the trunk cable to the cable tray;
* Install the cable tie at the specified interval (5.5m) from top to bottom until the trunk cable is securely fastened;
* Check the cable jacket for damage and cover the outer cover of the bridge.
(2) laying fiber optic cable through the ceiling
In this system, the path of laying the optical fiber from the weak electric well to the wiring closet is generally adopted by the method of laying the ceiling (cable bridge):
* Open the ceiling along the proposed fiber routing path;
* Use a tool to cut off the outer sheath of a section of fiber, and cut the outer sheath of the cable at 0.3m from the end, and then remove the outer sheath;
* Cut the fiber and the reinforcing core and cover it in the outer sheath, leaving only the yarn. Repeat this process for each cable that needs to be laid;
* twist the yarn and the belt together;
* Tighten the cable jacket with a length of 20cm tightly with a tape;
* Feed the yarn into a suitable clip until the sheath wrapped by the tape is fully inserted into the clip;
* Wrap the strap around the clip and cable to pull the cable to where it is needed and leave a fiber cable long enough for subsequent processing.
5. Main materials for fiber termination
* Connecting device
* Sleeve: black for 3.0mm diameter fiber; silver for 2.4mm single fiber
* Buffer layer fiber optic cable support (boot)
* Expander with threaded cap
* Protective cap
6. Method of assembling standard fiber optic connectors
(1) ST-sheathed fiber optic field installation method:
a. Open the material bag to drive off the connector and the back cover;
b. Rotating the installation platform to open the installation platform, and fixing the installation tool on a workbench with the provided installation platform base;
c. Insert the connector into the mounting platform socket and release the release spring upward. Push the rear cover of the connector toward the mounting platform jack. After the current shield is pushed into the mounting platform jack, turn the connector 1/4 turn clockwise and tighten it in this position. The shield is left on top.
d. Tighten the elastic sleeve on the rear cover of the connector (pinch the elastic sleeve to help insert the fiber), and place the thin end of the rear cover with the elastic sleeve on the fiber, and squeeze the sleeve along the direction of the core. Before slipping.
e. Use a wire stripper to strip the outer sheath from the end of the fiber about 40-50 mm. The jacket must be stripped clean and the end faces at right angles.
f. The yarn head is placed away from the buffer layer to the back, and the buffer layer at the end of the sheath is marked and marked on the buffer layer.
g. Hold the fiber at the exposed buffer layer and strip the 900 μm buffer layer from the 6 mm or 11 mm mark at the end of the fiber.
* In order not to damage the fiber, the buffer layer is stripped from the fiber for a short period of time;
* Grip the sheath to prevent fiber movement;
h. Carefully scrub the bare fiber with a piece of paper or cloth dampened with alcohol.
i. The yarn is wiped aside and the buffer is laminated to the fiber cutter. Remove the discarded fiber with tweezers and place it in the waste bottle.
j. Insert the cut fiber into the side hole of the microscope to check if the cut is acceptable.
* Place the microscope on a white panel for a clearer and brighter image;
* The bottom end of the microscope can also be used to check the end ferrule of the connector.
k. Remove the rear dust cover from the connector and still drop it.
l. Check that the reference marks on the buffer layer are in the correct position. Carefully insert the bare fiber into the connector and know that the fiber is touching the bottom of the connector. Secure the fiber with a fixed clip.
m. Press the piston of the mounting platform and slowly release the piston.
n. Push the connector forward and turn the connector 1/4 turn counterclockwise to remove the connector from the mounting platform. Put the connector into the pleating tool and make it straight. Use the first groove of the pleating tool to wrinkle the "buffered pleat area" on the buffer layer.
o. Reinsert the connector into the mounting platform jack and lock it. Rotate the connector counterclockwise 1/8 turn and carefully cut off the excess yarn.
p. Slide the extrusion sleeve over the yarn to ensure that the compression sleeve fits snugly against the buckle attached to the rear end of the connector and which slot in the middle of the discount tool is used to fold the compression sleeve.
q. Loosen the core wire. Straighten the fiber and push the back cover to engage the front cover. A slight click can be heard when properly inserted, at which point the connector can be removed from the mounting platform.