How to distinguish the true and false of the amp network line - Huaqiang Electronic Network

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Amp (AMP) network cable is divided into AMP

, AMP

. AMP super five categories and six categories are divided into two types: unshielded (UTP) and shielded (FTP).

 The detection method is as follows: 

 1. Check the conductor material of the network cable. There are many network cables on the market. There are many kinds of conductor materials. There are copper, copper-clad aluminum, copper-clad steel, copper-clad iron. The good cable conductors are made of oxygen-free copper. The price difference is very much. Take the scissors from the core angle and cut it to see if it contains impurities or other metal colors. The copper-plated network cable is usually only coated with a layer of copper on the surface, which can save a lot of cost, but Will cause the speed and service life of the information transmitted by the network cable. 
 2, check the flexibility of the network cable quality cable is designed in consideration of the convenience of wiring, try to be very flexible, no matter how curved is very convenient, and not easy to be broken. At present, there are many profiteers on the market in order to obtain high sales profits, and other cheap metal components are included in the pure copper quality network cable, so the cost of the network cable will decrease, but the quality and performance of the cable itself is not high. Similarly, the phenomenon is that the texture of the cable is no longer so soft, and the transmission speed of the cable is greatly reduced. If the cable is repeatedly bent during the wiring process, the copper cable inside the cable may be broken. Of course, if you find that the cable is too soft, you should also pay attention to it may be a fake and shoddy product. 
 3, test the flammability of the network cable In general, the materials that make up the network cable must be required to have anti-combustion properties, otherwise if there is a fire, then the loss is heavy. Therefore, when you choose the network cable, you must check the flammability of the cable skin to distinguish the authenticity. In the specific test, you can use scissors to cut the outer skin of the length of about 2 cm, and then use a lighter to burn against the outer skin. The outer skin of the original cable will be melted and deformed under the fireworks barbecue, but the outer skin will definitely not be If it is found that the outer skin of the cable can not withstand the test of fire, if it burns at a point, then the transmission speed of the cable should be as high as possible. After all, such a cable is very unsafe in the wiring project. There is a big security risk. I once found a genuine network cable and a fake network cable, and at the same time ignited them with a lighter. After 6 seconds, the original cable was only white smoke and gradually melted and deformed with time, and the fake network cable was less than 2 seconds. It is easily ignited and is accompanied by a large amount of black smoke. 
 4. Test the temperature resistance of the network cable. There is a high requirement for the network cable to resist the change of the external temperature. It is not to be able to resist any environmental changes. At least the network cable cannot be softened or cracked under high temperature or low temperature environment. In order to ensure that the performance of the network cable is not affected in the high temperature environment, the outer skin material used by the genuine network cable can withstand the high temperature test of up to 50 degrees, and there is no phenomenon that the network cable is softened or deformed. If a small section of the mesh sheath is intercepted and placed next to the stove for a period of time, it is found that the outer skin is softer than the normal outer skin, indicating that the quality of the cable is certainly not too hard. 
 5. Identify the logo on the outer skin of the cable. When the cable is actually selected, sometimes the environment or conditions of the test are lacking. When the quality or material of the cable cannot be tested by the above method, you may wish to identify the cable by observing the logo on the outer skin of the cable. The authenticity. Under normal circumstances, the network cable of the regular brand has the type identification of the network cable and the trademark of the manufacturer. For example, the CAT5 logo indicates that the cable is a Category 5 cable; the CAT5E network cable is a Category 5 cable; the CAT6 logo indicates that the cable is a Category 6 cable. Line; if there is no sign on the outer skin of the network cable, everyone should be vigilant and find ways to create conditions to test and identify the network cable according to the above method. 
 6. Testing the winding distance of the network cable It is known that the ordinary twisted pair is connected by four sets of intertwined network cables. The so-called network cable winding distance is actually the length of the network cable New Rao section. Usually people use the winding distance to indicate the tightness of each pair of wire pairs, and in order to minimize the crosstalk between each pair of wire pairs. Often, the pairs are tightly wound in a counterclockwise direction, and the windings used for each pair of pairs should not be the same. However, in order to reduce the production process and reduce the cost of the process, many profiteers who produce the network cable often entangle the four pairs of wires in the same winding distance. Even the winding distance of many inferior wires is as high as several centimeters, so the crosstalk between the pairs is large. Increased, seriously affecting the performance of the network cable. 
 7. Test the stretchability of the outer skin. Considering that the network cable often needs to be bent during wiring, many regular manufacturers have left a certain stretch on the outer skin to ensure that the cable is not damaged when it is bent. Therefore, when everyone pulled the regular cable with both hands, it was found that the outer skin was stretched. If the outer skin of the cable is pulled hard, or if the outer skin is under the action of external force, there is a crack phenomenon, indicating that the quality of the cable is problematic.