General Wiring Summary

Do a wiring network engineering and wiring test, and now talk about wiring system training courses, contact with thousands of users, some feelings, written to peer experts advice.
Network & Cabling (Network and cabling):
First contact with network engineering, there is no concept of wiring, to do a network engineering concept is to hold the hub, network card, network cable (possibly coaxial) and RJ-45 head (may be BNC head and matching), but also with a set of NOS, the most important is the application software. All work is done at the user site. If OK, thank goodness! If there is a problem, it is like the wind like rain and fog, network cable, connectors, network cards, HUB, PC, nos or application software, are like the cause of the failure. After setting up the concept of the correct integrated wiring system, the paper realizes that the wiring system is only a passive system, which provides a passive platform for network equipment and is the base and foundation of the network. The network application is transparent, that is, the wiring system does not care about the type of network, network operating system and which company's network products, it provides the same support. And the test is the wiring system limit evaluation, test report is a wiring system on the network application of a commitment, such as the system can reach five class 100MHz, or six class 200MHz. and a variety of network equipment is erected in the wiring system on an active platform, the application system on this platform is the soul of the network. So wiring, networking, and application are like the art of acting on stage, actor and actor in a cast. Correctly establish the relationship between wiring and network, for the elimination of network failures can play a multiplier effect. First check the wiring system, to carry out the testing of passive authentication, and then check the status of network equipment, and finally check the application of the network.
　　
Product & System (Products and systems):
Minor works on the wiring of products and systems do not have a deep certification, but the more the project, the problems encountered more and more, million points in the wiring project if there is a point test unqualified, then party A (user), installers, suppliers of products and systems related to the problem. Cabling products and other IT industry products have a common, but also its characteristics, is that the end user needs is a consistent with international and domestic norms of the wiring system, a data, voice and video transmission support platform. and wiring manufacturers to provide a series of standard wiring products and cabling system of ideas and methods, in the wiring between manufacturers and users need to install the product installed in the user building site. Therefore, the design, installation Engineer's professional level played an important role. A series of qualified products can be installed into a qualified system, can also form an unqualified system, because the test results of a system performance depends not only on the supply of cables, connectors, but also on the installation of the process and quality and cabling system routing environment impact. Therefore, the manufacturer's wiring system certification engineer training is particularly important. In addition to familiar with the product, but also from the wiring system standards, program design, installation, construction, project management, acceptance testing and other aspects of comprehensive training. Cosmos (wonderful) Cabling System quality Assurance system fully embodies this concept, that is, the manufacturers to provide qualified products, engineers to accept strict comprehensive training, complete the wiring system project every point of information needs to meet the international and domestic testing standards of strict certification testing. ---http://bianceng.cn (computer science)
　　
Solid Cable, stranded Cable & Patch Cord (hard wire, cords and jumpers):
The twisted pair cables used in wiring are strictly stipulated in the ANSI EIA/TIA-568A specification. Solid Cable (hard wire) is used in the horizontal wiring system part, stranded Cable (flexible cord) is used in the equipment subsystem, the management subsystem and the work area subsystem. Can often have installers or users will be laid in the level of the remaining hard line system, through their own system to do RJ45 head, as the work area, the management of the jumper use, which is not in line with the purpose of the integrated wiring system. The system itself allows the user to easily change, add, transfer, and extend the cable to change the routing of the cable to achieve system manageability and flexibility. The correct way to use this is to use stranded Cable as a jumper for the above purpose. The best choice is to use wiring manufacturers of the original molding jumper. Because the homemade jumper is time-consuming and laborious, after all, the performance is not adequate protection, and it and network products and other parts of the wiring system to cause the network failure probability is the same. Now some manufacturers such as Cosmos (wonderful), such as the introduction of the original molding jumper machine production, not only the performance of the protection, reasonable price, but also with a variety of lengths, a variety of colors, fully in line with the TIA/EIA-606 integrated wiring system Management ideas. So the era of homemade jumper can be over!
　　
Margin & Value (allowances and values):
At the end of the project, the Construction installation Party shall submit to party a a copy of each point of the electrical performance test report, in the test report to this information point to make pass (qualified) or fail (failure) evaluation. And there will be specific test report content. Can often have a party (or user) to put forward: Although the report of pass, but the report shows that the highest can only run to 35 trillion or 67 trillion, and so on the construction of the installation side questioned. This involves understanding the principles of testing. When testing the parameters of attenuation (attenuation), near-end crosstalk (Near-and Crosstalk), the tester not only tests each line pair, but also takes the frequency points in 0MHz to 100Mhz range for each line to test. (Specific sampling frequency step is stipulated in the test specification), the sampling frequency point is measured by a specific value (value), which has a difference from the specified value in the specification (Limit), and different frequency points have different difference values, and when all the test values do not exceed the specified value (Limit), To indicate compliance with the standard, you can use pass summary, then take all the difference in the minimum value that is the margin (margin) of the frequency point in the report, this frequency point is not necessarily exactly in the 100MHz. As a result, it is shown in the report that the minimum margin (difference) of the 0MHz to 100MHz range is the frequency point, not the lowest test value. Therefore, when pass is shown in the report, it means that the information point to the management of the wiring racks composed of 5 classes of 100MHz or 6 200MHz.
　　
Establish the correct wiring concept, for wiring manufacturers, installation builders, party A and users in the implementation of the project are beneficial. There are some wiring ideas in the future of the article to talk again.