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2014年12月30日星期二

Status of wire and cable industry

Wire and cable industry is the second largest industry in China, second only to the automotive industry, product variety to meet the rate and the domestic market share of more than 90%. In the world, China's wire and cable output has surpassed the us to become the world's largest cable producer. With the rapid development of China'swire and cable industry, the growing number of new enterprises, the industry overall technological level has been greatly improved.
China's sustained and rapid economic growth, providing a huge market space forwire and cable products, the Chinese market strong allure, makes the world all eyes focused on the Chinese market, in the reform and opening to the outside world in short decades, huge production capacity of China's cat5e LAN cable industry formed to make the world with admiration. As China's power industry, data communications, urban rail transit industry, automobile industry and shipbuilding industry scale unceasing expansion, the wire and cat5e patch cable demand will grow rapidly, the future electric wire and cable industry has huge development potential. In 2008 November, our country to cope with the world financial crisis, the government decided to invest 4 trillion yuan stimulating domestic demand, which has about 40% for urban and rural power gridconstruction and transformation. National wire and cable industry has a good marketopportunity, around the wire and cable enterprises to seize the opportunity, meet the new round of urban and rural power grid construction and transformation.

2014年12月26日星期五

Storage method of cable

Cable if stored for a long time, according to the position of the cable, should make the following considerations:
1, under the eaves. Cable only in not exposed to direct sunlight or ultra high temperature, standard LAN cables can be applied, recommend the use of pipeline.
2, external wall. Avoid direct sunlight and man-made damage to the wall.
3, in the pipeline (plastic or metal). As in the pipe, pay attention to thermal damage and metal pipe plastic pipe.
4, application of suspension / overhead cat5e cable . Considering the cable sag and the pressure, to adopt what kind of binding mode, cable is directly illuminated by the sun.
5, directly in the underground cable trench laying, the environment is the control of the minimum range. cat5e ethernet cable  trench installation must be periodically dry or moist degreeexamination.
6, the underground pipeline. In order to facilitate future upgrades, replacement of cables, and surface pressure and the surrounding environment isolation, auxiliarypipe isolation, auxiliary pipeline is a better method. But don't expect the pipeline will always keep dry, it will impact on the cable type selection.

2014年4月27日星期日

The main categories of 12 port patch panel

Positioning 12 port patch panel is in front of the central office of information points modular device management. The front of the information point cable (Cat5e or 6 cable) into the equipment room after the first into patch panels, patch panels will hit the line modules, patch panels and switches then connect a jumper (RJ45 interface) . Overall, the patch panel is rj45 keystone jack  used to manage the device, for example, if there is no patch, direct access to the front of the information points to the switch, so that once the cable problems, faced to rewiring. In addition, the management is also a bit confusing, multiple plug may cause damage to the switch port. MDF exist to solve this problem by replacing the jumper to achieve better management.
12 port patch panel Dosage and overall network is mainly based on the number of points or the floor (and similar floor, depending on how the system is designed diagram) points to the number of network configurations. Different buildings, different system designs, patch panels are the main differences between the devices. For example, a building only four rooms, the barrier terminal block  master device is set on the first floor, all floors between network points are entering the device, then the patch is equal to the number of the building all network points / patch panel port number (24 mouth, 48, etc.), plus got to margin; If, on the 9th floor of a building has a room, the master device is set on the fourth floor, then in order to avoid long cable, it may partakers devices are located on each floor , and there is exchange equipment. So the main distribution frame between devices on the network is  rca video cable equal to the number of points / patch panel ports (24, 48, etc.) 4 layers. Most 12 port patch panel UTP patch panels are used for horizontal wiring. The front panel assembly line equipment used to connect an RJ-45 port on the rear panel for connecting twisted-pair extending from the information outlet over. UTP patch panels are mainly 24 and 48 in two forms.
In shielded cabling system, shielded twisted pair patch panel should be selected to ensure the integrity of the shield system.