A, why need six products provided by the application of bandwidth?
A: bandwidth than the highway, you must provide enough bandwidth to increase the data rate, improve the bandwidth is equal to 2 times public traffic line double speed, speed the development of the past data and the future demand forecast shows data rate will be doubled every 18 months. Nowadays application running on a 1 gb/S speed has super five kind of wiring to the limit, with the growing popularity of the streaming multimedia applications, data speed will increase the demand, as the 90 S five types of cabling instead of three kinds of wiring, in order to satisfy the demands of increasing network speed (such as 100 basetx) (note: the bandwidth of the defined as the highest frequency of ACR show a value greater than 0).
Second, the ultra is the basic difference between five and six products?
A: super five and six basic difference lies in the transmission performance of products and the improvement of the bandwidth. Five types of bandwidth is 100 MHZ; Including the NEXT (near end crosstalk), the RETURN LOSS (echo) and ELFEXT equivalent far-end crosstalk () and so on to improve the performance of transport, it may improve the ACR values, so as to improve the stability of the application and make the system transmission speed is improved.
Three, six products what are the advantages of relatively in five kinds of products can improve the network performance?
Answer: because of the improvement of the transmission speed and transcend the anti interference performance, and more than six products super five kinds of products can effectively reduce the bit error rate, thus reducing the lost packets and need repeat transmission, greatly improving the stability of the network.
Whether you need four, six types of cables and connectors use match each other to form a "harmonious" wiring system?
A: there are some wiring manufacturer advocates "harmony" wiring system, in order to improve the system of the margin, but so far did not receive the concept in the six standard specification. In theory, every parts TIA standards only require separate by 6 class standards, can ensure good link or channel performance.
5 to 6 class, would you please do not use cable and directly USES optical fiber cable?
A: of course you can do it, but the optical fiber system is very expensive, but the price is often a customer decision factors, nowadays the cost of the fiber optic cabling system wiring for six class 2 times. Installed at the same time copper is better than simple optical cable. In addition, copper products also support the IEEE 802.3 (af) is the grass on the DTE standards.
6, what is the electrical balance?
Of answer: the two piece of copper wire circuit is seen as a complete and balanced transmission line, a complete circuit in the transmission channel with the same electrical performance, and a balanced line has the same two copper wire in the electrical characteristics, "electric balance" refers to a physical structure and dielectric properties of copper. If 1 of the diameter of the copper wire, concentricity, conductive material basic same length is consistent, so it can be seen as the electric cable is relative to the outer environment balance. Electrical balance degree depending on the design of the cable and the production process, and six types of cable to the precision of the weighing process have high requirements, likewise six connectors also needs a balance circuit design, in the transmission of a balance, if the same voltage of electrodes in adding to the ends of the wire, the magnetic field generated by the electric current will offset each other, not to outside interference, likewise, 2 root brass body of interference is very few, because the interference of a foreign and a pair of copper on each conductor to produce the same equivalent voltage electrode, and 2 pieces of the voltage difference between the basic copper core is 0. And signal interference is the result of two copper core signal difference, therefore, external interference for balance transfer has a small effect. Difference is mainly depending on the voltage and the electrical balance level, and using the DB as the measure, in six class standard, this number is called the LCL.
Seven, the installer can we will make the jumper?
Answer: like a six kind of cables and connectors, six kind of jump line is high precision products, need to be extremely stable environment of production and testing, to ensure that the product performance, so the TIA standards, suggested six kind of jump line is applied to control the production factory in a certain environment, and should not be used for installation field produced by random.
Eight, super five and six plug module if there is a big difference? Why is six modules so expensive?
Answer: although outwardly six types and 5 kinds of module there is not much difference, but six class module has a higher transmission performance. For example: under the 100 MHZ range, a super 5 kinds of module NEXT value is 43 db, and the value of the six modules is 54 db. In other words, a super five class module compared to six class module will produce 12 times the noise, and the performance improvement depends on the improvement of science and technology, the improvement of the production process, material control, etc., so that greatly increase the cost.
Nine six class manufacturer, whether to need to jump line to enable the performance of the system?
A: TIA standards on six kind of jumper wire and connectors are the specification, as long as the products can pass the six parts and channel standard requirements. The whole system should be able to reach six class standard, and many manufacturers in order to improve the performance of the system margin, may the special production resistance matching cable connectors and jump line, to greatly improve the system transmission performance allowance.
Ten, whether can be different manufacturer of six product mix.
Answer: if every component in the system with six parts and the requirement of the channel, in theory, different manufacturers wiring system should also be available through six types of tests.
11, according to the 400 MHZ test of 5 kinds of cables and test according to the 250 MHZ six class cable difference?
Answer: the five kinds of standards of 0-100 MHZ following five kinds of products in all kinds of electrical performance. Basically, as long as the tester can support (such as 350 MHZ or 350 MHZ) is the test frequency range, you can test under the frequency performance of the product, but all the test results compared with the relevant standards are meaningless, while six standard standardizes the 0-250 MHZ range cables, connectors and the channel and the permanent link performance characteristics of the jump line, ensure that in the 0-250 MHZ applications have a reliable system performance.
Twelve, super five and six plug module if there is a big difference? Why is six modules so expensive?
Answer: although outwardly six types and 5 kinds of module there is not much difference, but six class module has a higher transmission performance. For example: under the 100 MHZ range, a super 5 kinds of module NEXT value is 43 db, and the value of the six modules is 54 db. In other words, a super five class module compared to six class module will produce 12 times the noise, and the performance improvement depends on the improvement of science and technology, the improvement of the production process, material control, etc., so that greatly increase the cost.
13, according to the 400 MHZ test of 5 kinds of cables and test according to the 250 MHZ six class cable difference?
Answer: the five kinds of standards of 0-100 MHZ following five kinds of products in all kinds of electrical performance. Basically, as long as the tester can support (such as 350 MHZ or 350 MHZ) is the test frequency range, you can test under the frequency performance of the product, but all the test results compared with the relevant standards are meaningless, while six standard standardizes the 0-250 MHZ range cables, connectors and the channel and the permanent link performance characteristics of the jump line, ensure that in the 0-250 MHZ applications have a reliable system performance.
14, what is the shortest link TIA standards allow?
Answer: there is no specification in TIA standards the shortest link, theory of TIA standards allow of no less than 100 m channel link, ANSI/TIA/EIA - 568 - B has mentioned the distance between each contact and communication should be kept more than 15 m, to reduce interference produced by plug device in the proximal, this recommendation is based on a channel model of 4 points under the worst case of distance calculated by the shortest link.
15, what circumstance should consider to install 6 products?
A: if the application requirement of considering network in the future, in theory should be installed the most advanced cabling products, because after the installation of cable is often difficult to update replacement, basically, a wiring system to apply at least 10 years as a standard, can support 4 to 5 years of the performance of the network equipment update, if the future of Internet equipment need to be better cable to improve the speed of data. So, six types of cable to use instead of super five type of cable is inevitable, but the cable back to form engineering is very expensive, so even though six product prices relatively in five kinds of products are more expensive, but in order to reduce the network upgrade in the future, six kind of product is still worth considering.