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Differences between CAT5E, CAT6 And CAT6A in System Performance And Ethernet Application(1)

An important principle in designing a network system is to try to exclude the transmission bottleneck of the entire computer network from the passive network as far as possible. Under normal circumstances, it should be formed on the backplane of the switch or the server connection so as to be easy to upgrade and protect the network User investment. Therefore, the use of six types of systems is absolutely necessary. We also expect our customers to follow the principle of "reasonable investment, unified planning, based on the present and appropriate advance", fully consider the actual application requirements and future development, fully consider the advanced technology, and choose the right one to support the development of high-speed network applications in the future Intelligent system of their own integrated wiring system solutions.

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In the past 100M Fast Ethernet era, our cabling system using Category 5 cabling has been able to meet the network applications of this bandwidth, but with the development of computer network technology and a variety of emerging network applications (such as: video conferencing , High-bandwidth data services such as high-definition video on-line) This has brought new demands on the network bandwidth, then there 1000M Ethernet applications, in order to meet the 1000M Ethernet applications will be the original CAT5 cabling system performance optimization At this time there has been performance slightly better than CAT5 cabling over five cabling system, CAT5 cabling system in the past 10 years, basically lost its vitality in the market, faded out of the integrated wiring market.


There are two network application standards for 1000M Ethernet applications in the field of Ethernet applications. One is the 1000BASE-T Gigabit Ethernet standard approved by the IEEE Standardization Committee in 1999 at the initial stage of Ethernet upgrade from 100M to 1000M. The application standard is specifically designed for use with existing Category 5 copper wire systems and is proposed to meet the need for dramatic bandwidth expansion without changing existing cabling. The technology is based on four pairs of twisted pair, each pair of lines simultaneously send and receive signals, and the use of extremely complex 5-level encoding technology, anti-jamming and echo suppression technology. This technology makes the network interface switch and network card circuit design becomes very complicated, is not conducive to reducing the size of the device and cooling, but also higher production costs.


Another Gigabit Ethernet application standard is the 1000BASE-TX Gigabit Ethernet standard reissued by the TIA / EIA-854 Committee for Standardization after the 1000BASE-T was released by the IEEE Committee for Standardization. This technology is also based on four twisted pair , But it is sent on two pairs of lines with two pairs of lines received (this is similar to using a pair of lines for data transmission in 100Base-TX Fast Ethernet applications and receiving data on a separate pair). Since each pair of cables does not transmit bidirectionally, the crosstalk between the cables is greatly reduced and the coding method is relatively simple. This technology requires a relatively low network interface, does not require a very complex circuit design, reducing the cost of the network interface. However, due to the reduced efficiency of using the cable (two pairs of line reception, two pairs of line to send), to reach the transfer rate of 1000mbps, you must require the physical bandwidth of the copper transmission medium more than 100MHz, that is to say in five categories and super five Cabling systems of this category will not support this type of web application.

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In the next article, Changzhou Winning Electronics will take you further to the world of network cables.