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Ten errors that you need to avoid in actual wiring

Source:Shanghai Feirui Measurement & Control Technology Co., Ltd.Date:2018-08-17

  First. No forward-looking planning for the overall network

  Gigabit networks are now popular, but there are still many companies that need to continue to use hundreds of megabits to the desktop network connection. For example, some companies need to relocate to a new office location, which requires redeployment of the network line, whether it should use the traditional network cable technology to meet the current application, or choose a new network cable technology that can be continuously upgraded in the next few years. It will be in front of us.

  What we need to pay attention to is that human resources costs are the highest part of the project operation. Although it seems that the selection of higher-level wiring schemes in the actual project implementation process is not very reasonable, we suggest that you should consider using better quality products as much as possible. This will keep your business from embarrassing when faced with higher network demands for a long time. Therefore, ensuring that the network cabling technology used is not prematurely out of date is a problem that network cabling personnel must consider.

  Second, voice and data services use different lines

  Considering the cost issue, many companies used to use different specifications and types of network cables in voice and data services. Since the voice service is not very demanding on the line condition, as long as a single wire can be used to reach the standard, providing a cheaper line for the voice service can ensure that the data line receives a larger portion of the budget.

  Even today, although the capital spent on integrated wiring is still a small expense, the biggest expense has become the cost of human resources, and the line itself no longer accounts for the highest investment share.

  In short, before the start of the work, we can't simply assume that the voice service only needs to use the old type 3 line to meet. If you need to deploy a separate line for your phone, you should ensure that its performance is rated to support data lines.

  Third, no effective management of the line

  Often, everyone will think that increasing the number of lines will help existing systems. The addition of trapezoidal racks and consequent rack-based line management does increase operating costs. But it also makes routine maintenance work very simple. It should be noted that the line management work will not automatically terminate because the project is finally safely completed. As more and more lines are added, the reality will change.

  Therefore, we must adhere to the identification of the cable, sort by color, or take some other type of special treatment to ensure that the relevant line can be easily identified under any circumstances.

  Fourth, the network cable and the cable are formed in parallel

  The data line is transmitted in a "twisted pair" (unshielded twisted pair) mode. The magnetic field generated by the operation of low voltage through the wires is an important part of the communication chain. When the unshielded network cable is parallel to the wires, the problem of magnetic field interference occurs, which will result in a large amount of repeated and garbled information in the transmitted data. In many cases, this will result in the failure of efficient transmission between the two places, the transmission rate will drop rapidly, and there will be frequent problems requiring repeated transmission.

  If you have to deploy a network cable near the wire, be sure to pass it vertically instead of parallel.

  Five. The network cable and the "interference" device are in the same area.

  In the real world, it is not only the wires that can interfere with the data lines. Fluorescent lamps for lighting, motors, and related equipment capable of generating electric or magnetic field interference can have a serious impact on the transmission of data on the network cable. Therefore, when wiring, we need to make sure that the line is away from the area where these sources of interference are located.

  Six, regardless of the actual distance limit

  Before starting the wiring, you should first confirm the distance and range of connections you need to implement. For example, a typical twisted pair cable is used for typical Ethernet cabling. The distance in a Gigabit network is limited to 100 meters. If the company chooses 10 Gigabit or 40 Gigabit technology, it must be based on the corresponding specific design distance.

  Seven. Violation of laws and regulations

  Laws and regulations play a decisive role in many aspects, so if they do not meet local regulations, they may pose a security risk. For example, in most places, the use of PVC sheathed wires in air-cooled environments is prohibited. Because PVC produces toxic gases when burned, it can cause damage to firefighters and other emergency handlers.

  Eight, neglect to test the line

  After the wiring work is completed, each line should be tested with various tools to ensure that they meet the predetermined requirements. The work involved involves verifying the transmission distance and the specific specifications of the cable. In the case of a Gigabit network, the line needs to be verified to ensure that the requirements are met.

  Nine, do not follow industry standards

  As we all know, there are eight separate lines in each network cable. Therefore, as long as we can guarantee that the modes used at both ends of the line are the same and the types are the same, we can connect them arbitrarily. Facts have proved that this view is wrong. Therefore, there are reasons for setting industry standards. In the wiring standards, it is necessary to consider the distortion of the line and the influence of the external environment.

  If these standards are not followed during wiring, problems such as interference and inefficiency may occur, which may adversely affect the overall performance of the network. The standards mentioned here are EAI/TIA-568-A and B, which specify how data-type lines are deployed.

  Ten. No reasonable planning for new lines

  When we need to use Ethernet switches in the network to handle the newly added lines, it is necessary to specify that the use of Ethernet switches will bring unknown factors and no to the entire network without scientific and rational planning. The risk of stability.

  Usually, users who use microswitches often only need to add one or two ports, so there is no need to plan traffic. And because of the extra port factor added, it may cause problems. If the new service requires a lot of network resources to support, it is necessary to avoid bottlenecks.

  Therefore, it should be noted that in the absence of absolutely necessary to increase the number of switches and network ports, it is necessary to consider other ways to increase network capacity, such as adding new lines to expand the network scale.