Views: 0 Author: Vicky Publish Time: 2023-04-25 Origin: Site
Introduction to wire management process
1 waterfall styling management
This is a relatively ancient wiring model, and traces of it can still be seen sometimes. It adopts the artistic image of "water curtain hole", directly hangs the twisted pairs from the module of the distribution frame, and has a very beautiful sense of hierarchy when distributed neatly (24-48 twisted pairs per layer).
At present, it can still be seen that the rear of some distribution cabinets adopts waterfall-type cable management technology, that is, the cables are not bound in any way, and are directly swayed from the rear of the distribution panel to the ground. The advantage of this is to save labor and reduce interference between lines (crosstalk).
The waterfall cable management method is the most common cable management method. It uses nylon ties to bind the cables to the columns and beams inside the cabinet. It does not consider the appearance, but only ensures that the space in the middle can be used for network equipment.
The advantage of this shape is that it saves manpower for cable management, but it has many disadvantages, such as:
1). It is easy to damage the shape when installing network equipment, and even the phenomenon that it is difficult to install the network equipment in place;
2). The weight of each twisted pair becomes a tension force acting on the rear side of the module. If the twisted pair is not bound before the termination point, then this pulling force may separate the module from the twisted pair after months or years, causing a disconnection fault;
3). In case a certain module in the distribution frame needs to be re-terminated, the maintenance personnel can only probe into the "water curtain hole" for construction, sometimes wearing dozens of twisted pairs, and because there is generally no internal wiring in the cabinet. If the light source is installed, it is not easy to see clearly during the termination, which increases the probability of wrong termination.
2 reverse line management
Also known as reverse line management. Reverse cable management is performed after the modules of the distribution frame are terminated and passed the test. The method is to arrange the wires from the module to the outside of the cabinet, and at the same time arrange the wires in the bridge. The advantage of this is that after the test, the cable will not be re-arranged because a certain twisted pair fails the test, but the disadvantage is that since the two ends (the cable inlet and the distribution frame) have been fixed, the There is bound to be a lot of messy wires somewhere (usually the bottom of the cabinet).
Reverse thread management is generally manual thread management, which is completed with the naked eye and hands. Since there are a large number of cables in the cabinet, they are crossed and entangled with each other when they are threaded, so this method consumes a lot of time and cannot improve work efficiency.
The advantage of reverse cable management is that the test has been completed, and there is no need to worry about the length of the cables at the rear of the cabinet. The disadvantage is that because the two ends of the cable have been fixed, there will be a large number of crossovers between the cables. The location is often under the floor (when the line is coming in from the bottom) or on the ceiling (when the line is coming in from the top).
3 forward line management
Forward routing is also called feed-forward routing. Forward cable management is the cable management before the distribution frame is terminated. It often starts from the cable entrance of the computer room (if it is twisted pair cable management from cabinet to cabinet, it starts from the distribution frame in one of the cabinets), arranges the cables segment by segment, up to the rear of the module on the patch panel. Perform termination and testing after cable management.
The goal to be achieved by forward cable management is: the horizontal twisted pair from the cable inlet of the computer room (or the network area of the computer room) to the distribution cabinet forms a unit of 16/24/32/48-port distribution frame. The bundled horizontal twisted-pair wire harness, all the twisted-pair wires in each bundle are all parallel (the crosstalk between the wires generated by the parallel twisted-pair wires in a short distance will not affect the overall performance, because the bridges and wire tubes are laid Most of each twisted pair, this part is scattered and non-parallel), and all the wire bundles are parallel; each twisted pair in the cabinet is bent and laid to the rear of each distribution frame, In the whole process, the twisted pairs in the wiring harness are still kept parallel throughout. Pull out the twisted pair corresponding to the module from the bottom of the wiring harness at the back of each module, and fix it on the wire support frame behind the module or pass it into the module hole of the distribution frame after checking.
The advantage of forward cable management is that it can ensure that the cables in the equipment room are neat at every point, and there will be no cable crossing. The disadvantage is that if the cable itself has been damaged during threading, failing the test will cause rewiring. Therefore, the premise of positive cable management is to have sufficient confidence in the quality of cables and threading.
Positive wire management process
In the process of forward cable management, the cooperation of wiring materials is required, and the use of cable management boards and cable management tables, combined with the cable management process, can complete a beautiful, reliable, fast and reserved effect at the same time. The following introduces the basic construction process of forward line management in the most common way of right-in and top-out line management:
1. Fix the distribution frame in place, install the bracket on the back, and put the panel paper with the printed wire number on the distribution frame (or paste it on the distribution frame) on the front. If the module of the distribution frame can be removed, it should be removed. Lower module;
2. Positioning of the cable management board: the direction of the cable management board should be determined before threading, so that the direction of the cable management board does not need to be reversed during the cable management process, so that the E1 hole can be naturally aligned with the No. 1 module. Holes 2-5 on the board are parallel to No. 2-5 on the distribution frame. Usually, you can use this method for positioning: first place the cable management board vertically behind the No. 1 module, so that the E1 hole faces the No. 1 module (the side with the word faces the No. The future routing direction is to move to the cable inlet of the computer room. When moving, ensure that the cable management board only moves in parallel and does not rotate. When the cable management board reaches the cable inlet, write down the orientation of the cable management board (mainly A1 hole location), for the subsequent use of each cable management board;
3. Wire management board threading: Next to the cable entrance in the machine room, adjust the direction of the board according to the orientation determined by 2, and thread the horizontal twisted pair wires into the wire management board according to the wire number according to the wire management table (with words One side faces itself, and the thread penetrates into the board from the side without characters), this process is generally completed by two people: one person finds the line number (just find the line number required by the line management board) and puts it Separated from other cables, one person passes the wires into the corresponding holes of the cable management board. It should be noted that all twisted pairs should pass through the cable management board, that is, the cable management board should be placed next to the cable inlet, so as to ensure that all twisted pairs entering the computer room are sorted out;
4. Routing cable management: First use Velcro (or nylon cable ties) at the root of the outer side (without characters) of the cable management board to bundle the twisted-pair wires passing through the cable management board; Move in your own direction, and after moving 100mm, use Velcro (or nylon cable ties) on the outer root of the cable management board to bind it again (to prevent the previous binding from loosening). The wires in the outer circle of the cable management board and the wires in the middle of the cable management board are inside the harness. After the determination, the relative parallelism of all the twisted pairs must be kept to the rear of the farthest module of the distribution frame (that is, the 24th rear side of the module); continue to move the cable management board about 200mm, and bind the outer root of the cable management board with Velcro (or nylon cable ties). The outer layer is transferred to the inner layer, and the inner layer wire is not allowed to be transferred to the outer layer; it is translated in sequence until the distribution frame is reached;
5. Wire harness fixing: During the wire management process, if you encounter the wire binding hole on the bridge frame or the wire binding plate in the cabinet next to it, you should bind the wire harness on the bridge frame or cabinet while binding the wire harness to prevent the wire harness from sliding down;
6. Corner cable management: When a turn is encountered during the translation process, the cable management board must be close to the corner and follow the turn beside the corner. It is not possible to attach the corner after binding (because the line inside the corner is short, The wires on the outside are long, so if you bend in a straight line, the wire harness at the corner will definitely be deformed). This requires that all wire harnesses must be bound on site, and cannot be moved to the site after binding in advance;
7. Bracket cable management: When the cable management board reaches the bracket behind the distribution frame, first bind the wire harness on the bracket, and then move forward. Every time it reaches a module, bind the wire harness once, and then separate the The line number corresponding to the module. This process should be equipped with 2 people: 1 person to divide the line, 1 person to pull the line from the back of the distribution frame to the front of the distribution frame (if the module can be removed, pass the line from the module hole to the front), and 2 people at the same time check whether the line number is consistent with the panel number on the patch panel;
8. Take the exited cable management board back to the cable inlet, use the cable management table of the next 24-port distribution frame, and repeat 1-8 in turn to complete the cable management work of the next bundle of cables until all are completed.
Multi-bundle cable management (branch management)
When there are multiple distribution frames in the cabinet, the wiring harness of each distribution frame should be arranged separately. However, due to the limited width of the binding board in the cabinet (generally, the width is 100mm), only 3 to 4 bundles of 24 wire harnesses can be bound side by side, and a maximum of 2 binding boards can be placed on the right side of the cabinet with a depth of 800mm (inside the cabinet). The horizontal twisted-pair wires should be bound from one side to avoid affecting the appearance), that is, the goal of binding 200 horizontal twisted-pair wires may not be achieved. At this time, the secondary wire management method can be used. First, use the 8×8 wire management board to tie out 48 wire harnesses (6×8). After reaching a certain height, add a 5×5 wire management board to divide the wire bundle into 2 After finishing, continue to manage the cables to the distribution frame.
The starting point of the forward cable management can be the cable entrance of the cabinet, the opening of the bridge, the entrance of the equipment room, or even start the cable management from the panel of the work area (not recommended).