Comparison between the most popular category 7 cab

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Comparison between category 7 cabling and optical fiber

the rapid development of network applications has an increasing demand for bandwidth. The category 6 cabling system issued this year meets most current commercial applications with its 250MHz bandwidth. However, with the continuous progress of technology, it is only a matter of time before 250MHz bandwidth can not fully meet people's needs. Therefore, based on the development trend of the cabling system in the next few years, the discussion on the advantages and disadvantages of the seven types of cabling and optical cables is launched. Other anti-counterfeiting technologies include X-ray detection

the selection of cable type shall be comprehensively considered from the aspects of cable use, required transmission capacity, transmission bandwidth, price, etc. Cable types include unshielded twisted pair, shielded twisted pair and optical cable

(1) unshielded twisted pair UTP is the most widely used cabling system in China. It is suitable for network applications with transmission bandwidth below 250MHz and no special performance requirements. Its advantages are good overall performance, low price and convenient construction and maintenance. Category 6 cabling system has reached the performance limit of unshielded twisted pair

(2) aluminum foil shielded twisted pair FTP has large bandwidth, strong anti-interference performance, and low smoke and halogen-free characteristics. In contrast, the price and installation cost of shielded wire are higher than that of unshielded wire, and the cable bending performance is slightly poor. This form is mostly used in the shielding system of category VI line and before

(3) independent shielded twisted pair STP, each pair of wires has an aluminum foil shielding layer, and the four pairs of wires together have a common metal braided shielding layer, which is the standard structure of class 7 wires. It is suitable for high-speed network applications, provides highly confidential transmission, supports new applications in the future, helps unify the cabling platform of current network applications, and enables all kinds of information from e-mail to multimedia video to be transmitted in the same high-speed system. The additional shielding layer makes the category 7 wire have a large diameter. These characteristics require that special care should be taken in designing the installation route and termination space, leaving a large space and a large bending radius. At present, Corning has launched the category 7 wiring system in China

as early as 1997, cabling standardization organizations and manufacturers have proposed the concept of seven category copper cabling system, among which Corning released the 600MHz seven category cabling system in 1997. It can provide a comprehensive attenuation to crosstalk ratio of at least 500MHz and an overall bandwidth of 600MHz. Its connector requires a higher and more stable adhesion to the wall at 600MHz. The inherent pair provides a comprehensive near end series winding of at least 60dB. While the category 5 system only requires 43db at 100MHz, and the category 6 system requires 46db at 250MHz. Moreover, due to its excellent shielding design and high bandwidth, a typical class 7 channel can even provide a pair of lines with 862MHZ bandwidth to transmit cable TV signals at the same time, transmit analog audio signals in another line pair, and then transmit high-speed local information in the third and fourth line pairs. This kind of application is unimaginable at present, but it will be realized by category 7 cabling system in the near future. At present, category 7 cabling system launched by Corning company of the United States has taken the lead in the industry and reached 1. The thermal insulation performance of thermal insulation materials will drop sharply under the water absorption state with a bandwidth of 200MHz

compared with optical fiber local area, the solutions of the seven types of systems provide the desired performance and bandwidth, but their overall cost is only a fraction of that of optical fiber. Some people think that the optical fiber system can bring enough bandwidth to people, and the price of optical cables is close to that of category VII cables. However, if the cost of optical fiber routers, optical switches and optical cards is taken into account, the price advantage of optical fiber will be quickly lost

(4) optical cables, especially single-mode optical cables, can be used for high-speed network transmission, and have the advantages of innate immunity to electromagnetic interference, strong reliability and support for long-distance transmission. They are ideal network transmission media in the future, and their position is becoming increasingly important. However, optical cable equipment, materials and termination costs are relatively expensive, and the installation is relatively complex, so it is generally suitable for long-distance and large-capacity cabling. Current 62.5/125 μ M-mode optical cable has become the mainstream cabling medium in the generic cabling backbone system, and has become increasingly widely used in the horizontal system. Corning has launched a full set of optical fiber to desktop optical cable cabling system, and officially launched 10G Optical Cable cabling system in May this year

the new version of tia/eia-568-b.3 specifies the mechanical characteristics and transmission performance of optical fiber, connecting hardware and optical fiber jumper. Compared with 568-a, the most significant enhancement is the recognition of 50/125 μ M multimode fiber, and in addition to SC connectors, small component (SFF) fiber connectors are approved as connectors in the work area. Allowing the use of SFF connectors brings many benefits to end users. For example, the large size of SC connectors cannot support the industrial trend of high-density equipment interfaces, and using SFF connectors can easily connect two-core optical fibers in the same space as RJ-45. Due to TIA's approval of SFF optical fiber connectors, optical fiber equipment manufacturers such as Cisco, 3Com and IBM have integrated these interface designs into their products

in order to meet the needs of the industry for SFF optical fiber connection hardware, Corning incorporated fully supports MT-RJ and LC small component optical fiber connection products to provide universal and high-performance optical fiber connection. Corning UNICAM series mt-r is not only an indispensable basic production link for a large number of industrial and agricultural products, J connector is only one third of the size of SC connector, and the on-site fusion free technology is fast and convenient, with an average of less than 1 minute for each core of optical fiber termination

in a word, with the launch of seven types of standards at the end of this year, high-quality cable products, connectors and local cable testers with test bandwidth up to 750MHz will bring great possibilities and convenience to people's broadband applications. In the bandwidth range from 1 to 2GHz, cat 7 will win the market with its price advantage and extensive application support, while all-optical network will win in the future in higher bandwidth applications. (end)

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