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The most complete machine room and cabinet internal cable management process

Hits:Updated:2018-08-14 10:08:09【Print】

First, several principles of finishing the cabinet
 
The network cable should be organized according to the topology of the network and the existing equipment. The power cables and network cables of the cabinet should be separately arranged in principle. The equipment should be placed properly to avoid mutual squeezing, avoiding too high or too low, and avoiding too close to each other. If there are too many devices in the cabinet, the equipment should be numbered; the source should be indicated in the appropriate location for each line, and different connections (such as general network connection lines, cross lines, dedicated lines, etc.) should be identified differently. Method; the network cable arrangement is based on the room number and not on the person. In a word, it is clear: the layout is clear, the line order is regular, the mark is clear, and it is easy to maintain.
 
Second, the cabinet finishing steps
 
1. Preparation
 
First, you should inform the user to organize the cabinet without affecting the normal operation of the user.
 
Then, according to the topology of the network, the existing equipment, the number of users, the grouping of users, and other factors, the line drawing and the device location map inside the cabinet are drawn.
 
Next, prepare the required materials: network jumpers, label paper, various types of plastic cable ties.
 
2. Finishing the cabinet
 
Install the cabinet:
 
We need to do the following three things ourselves: first, tighten the holder with the screws and nuts of the random frame; second, pull the cabinet down to put the movable wheels on; third, according to the position of the equipment Adjust and add baffles on the mount. Finishing the line:
 
Group the network cables. The number of groups is usually less than or equal to the number of cable management racks behind the cabinet. Bundle the power cords of all the devices together, insert the plugs from the rear through-holes, and find the respective devices through a separate cable management arm.
 
 Fixed equipment:
 
Adjust the baffle in the cabinet to a suitable position so that the administrator can see the operation of all the devices without opening the cabinet door, and appropriately add the baffles according to the number and size of the devices. Be careful to leave a certain gap between the baffles. Place all the used switching devices and routing devices in the cabinet according to the pre-drawn map.
 
Network cable labeling:
 
After all the network cables are connected, you need to identify each network cable, wrap the prepared instant card on the network cable, and mark it with a pen (generally indicate the room number or what purpose), and require the logo to be simple and easy to understand. Cross-over cables can be distinguished from regular network cables by using sticky notes of different colors. If there are too many devices, classify the devices and label the devices.
 
Third, the introduction of the line technology
 
1, waterfall modeling line
 
This is an older wiring pattern that can sometimes be seen. It adopts the artistic image of “Huaguoshan Water Curtain Cave”, which directly hangs the twisted pair from the module of the distribution frame. When the distribution is neat, there is a very beautiful layering (24-48 twisted pairs per layer) line).
 
At present, you can still see some of the wiring cabinets on the back side of the waterfall-type cable management process, that is, the cable does not do any lashing, directly from the back side of the wiring panel to the ground. This has the advantage of saving labor and reducing line interference (crosstalk).
 
The waterfall type cable management process is the most common method of cable management. It uses nylon straps to tie the cables to the columns and beams on the inside of the cabinet. It does not consider the appearance, and only ensures that the space in the middle can be used for network equipment.
 
The advantage of this style is that it saves manpower and has many disadvantages, such as:
 
1) When installing network equipment, it is easy to damage the shape, and even the phenomenon that it is difficult to install the network equipment in place;
 
2) The weight of each twisted pair becomes all tensile force acting on the rear side of the module. If the twisted pair is not tied before the termination point, the tension may separate the module from the twisted pair after several months or years, causing the disconnection failure;
 
3) In case one of the modules in the distribution frame needs to be re-terminated, the maintenance personnel can only explore the "water curtain" for construction, sometimes wearing dozens of twisted pairs, and there is no universal The built-in light source makes it difficult to see when it is terminated, which increases the probability of termination errors.
 
2, reverse management
 
Also known as reverse management. The reverse cable is after the module of the patch panel is terminated, and after passing the test, the cable is connected. The method is to carry out the line from the beginning of the module to the outside of the cabinet, and at the same time, the line is also carried out in the bridge. The advantage of this is that after the test cable is tested, it will not be re-wired due to the test of a twisted pair cable. The disadvantage is that the two ends (inlet and patch panels) are fixed in the machine room. A large number of chaotic lines (usually at the bottom of the cabinet) are bound to occur somewhere.
 
The most complete machine room and cabinet internal cable processing _1
 
The reverse line is usually a manual line, and the line is completed by the naked eye and hands. Since there are a large number of cables in the cabinet, they cross each other and entangle when threading, so this method takes a lot of time and the work efficiency cannot be improved.
 
The advantage of reverse management is that the test has been completed without worrying about the cable length on the rear side of the cabinet. The disadvantage is that because the two ends of the cable are fixed, a large number of intersections between the cables will occur, and it is very laborious to neatly align, and there must be a twisted pair between the two fixed ends. It is often under the floor (when entering the line) or on the ceiling (when entering the line).
 
3, the forward line
 
The forward management line is also called the feedforward type management line. The forward cable is wired before the patch panel is terminated. It often starts from the entrance of the equipment room (if it is the twisted pair cable between the cabinet and the cabinet, it is from the distribution frame in one of the cabinets), and the cables are sorted one by one. Until the rear end of the module of the patch panel. Terminate and test after wiring.
 
The most complete machine room and cabinet internal cable management process _2
 
The goal to be achieved in the forward line is to form a horizontal twisted pair cable from the entrance of the equipment room (or the network area of ​​the equipment room) to the wiring cabinet in units of 16/24/32/48-port distribution frames. Beam bundled horizontal twisted pair, all twisted pairs in each bundle are parallel (inter-line crosstalk generated by twisted pairs in a short distance does not affect overall performance, because the bridge and the conduit are laid Most of each twisted pair, this part is scattered, is not parallel), and all the bundles are parallel; each bundle of twisted pairs is bent in the cabinet and laid on the back side of each patch panel. The whole process still keeps the twisted pairs in the bundle in parallel. At the back of each module, the twisted pair corresponding to the module is taken out from the bottom of the harness, and the check is fixed on the support frame behind the module or into the module hole of the distribution frame.
 
The advantage of the forward cable is that the cables in the equipment room are neat at every point, and there is no cable crossing. The disadvantage is that if the cable itself is damaged when threading, the test will not cause the cable to be re-wired. Therefore, the premise of the forward line is to have sufficient confidence in the quality of the cable and threading.
 
Fourth, the forward line process
 
In the process of forward cable management, the matching of wiring materials is required, and the cable management board and the cable management table are used together with the cable management process to achieve an effect of being beautiful, reliable, fast, and reserved. The basic construction process of the forward line is introduced below with the most common right-in and up-and-out lines:
 
1. Fix the distribution frame in place, install the bracket on the back, and insert the panel paper printed with the line number on the front side into the distribution frame (or on the distribution frame). If the module of the distribution frame can be removed, The module should be removed;
 
The most complete machine room and cabinet internal cable management process _3
 
2. Positioning the cable management board: The cable management board should first determine its direction before threading, so that the cable management board does not need a hard twisting direction during the cable management process, so that the E1 hole can be naturally aligned with the No. 1 module. The 2-5 holes on the cable management board are parallel to the 2-5 numbers of the distribution frame. You can usually use this method for positioning: first place the cable management board vertically behind the No. 1 module, and make the E1 hole facing the No. 1 module (the word side faces the No. 24 module), and then hold the cable management board along the cable. In the future, the route will move to the entrance of the engine room. When moving, ensure that the cable management board only moves in parallel and does not rotate. When the cable management board reaches the inlet, record the bearing position of the cable management board (mainly A1 hole). The location of the location) for subsequent use of each of the management panels;
 
3. Threading the cable management board: Next to the inlet of the machine room, adjust the direction of the board according to the direction determined by 2, and thread the horizontal twisted pair cable into the cable management board according to the line number. The word faces oneself, the line penetrates the board from the wordless side.) This process is usually done by two people: one person finds the line number (as long as the line number required for the cable management board is found) Separate it from the other cables, and one person puts the wire into the corresponding hole of the cable management board. It should be noted that the twisted pair should pass through the cable management board, that is, the cable management board should be placed close to the inlet line, so as to ensure that the twisted pairs entering the machine room are all finished;
 
The most complete machine room and cabinet internal cable management process _4
 
4, routing cable: first on the outside of the cable management board (no word side) with a Velcro (or nylon cable tie) to tie the twisted pair cable into the cable management board; then the cable management board along the designated The route is translated to its own direction. After panning 100mm, use the Velcro (or nylon cable tie) to tie the root of the cable outside the board again (to prevent the loosening of the previous tie). At this time, pay attention to make the harness form a circle, and the line outside the harness It should be the line around the outer circumference of the cable management board. The line in the middle of the cable management board is inside the wire harness. The relative parallel of all the twisted pairs after the determination is maintained to the rear of the module at the farthest end of the distribution frame (ie, 24 modules on the back side; continue to translate the cable management board about 200mm, and use the Velcro (or nylon cable tie) to tie the root of the outer side of the cable management board. Note that each line should be kept the same position as the previous binding. The line is transferred from the outer layer to the inner layer, and the inner layer is not allowed to be transferred into the outer layer; it is translated in turn until the patch panel;
 
5. Wire harness fixing: In the process of cable management, if the cable hole on the bridge or the cable clamp in the cabinet is encountered next to it, the wire harness should be bundled on the bridge or cabinet at the same time as the wire harness is bundled to prevent the wire harness from slipping;
 
6. Curved angle line: When encountering a turn during the translation process, the cable management board must be close to the turning angle, and turn along the corner. You can not tie it and then attach the corner (because the line inside the corner) Short, the outer line is long, so if you bend in a straight line and then turn, the wire harness at the corner will be deformed). This requires that all wiring harnesses must be tied at the scene, and can not be tied beforehand and then moved to the scene;
 
The most complete machine room and cabinet internal cable management process _5
 
7. Bracket cable: When the cable management board reaches the bracket on the back of the patch panel, first tie the harness to the bracket and then translate it forward. Whenever it arrives in front of a module, tie the harness once and then divide it. The line number corresponding to the module. This procedure should be equipped with 2 people: 1 person splits the line, 1 person pulls the line from the back of the distribution frame to the front of the distribution frame (if the module can be removed, the line is taken from the module hole to the front), and 2 people Check whether the line number is the same as the panel number on the patch panel;
 
The most complete machine room and cabinet internal cable management process _6
 
 
 
8. Return the removed cable management board to the inlet port, use the cable management table of the next 24-port patch panel, repeat 1-8 in sequence, and complete the cable management work of the next bundle wire until all is completed.
 
Multi-beam line (branch line)
 
When there are multiple distribution frames in the cabinet, the wiring harness of each distribution frame should be separately wired. However, because the width of the cable ties in the cabinet is limited (the general width is 100mm), only 4 to 4 bundles of 24 harnesses can be bundled side by side, and up to 2 cable ties can be placed on the right side of the cabinet with a depth of 800 mm. The horizontal twisted pair should be tied from one side so as not to affect the appearance), that is, the target of tying 200 horizontal twisted pairs may not be achieved. At this time, you can use the secondary cable management method. First, use the 8×8 cable management board to pull out 48 wire harnesses (6×8). After reaching a certain height, add another 5×5 cable management board to divide the wire harness into 2 After the bundle, continue to manage the cable to the distribution frame.
 
The starting point of the forward cable can be the cable entrance of the cabinet, the port of the bridge, the entrance of the machine room, or even the cable from the work area panel (not recommended).
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