Class 6 Cabling

With the rapid development of computer technology and the demand for fast communication, the demand for network speed is increasing. As a network communication platform, the bandwidth of the Integrated Wiring System is also increasing. The Integrated Wiring System has grown from Category 5 to Category 5. Currently, Category 6 and Category 7 are gradually accepted by users. After nearly four years and more than a dozen revisions, in June this year, the ANSI/TIA/EIA 568-B copper cable twisted pair 6 standards were officially published. The 6 categories of cabling market with different opinions finally had a saying ", the user also has a "ruler" in mind ".
6 types of market will develop rapidly
According to statistics, the six types of cables in China's Integrated Wiring market accounted for about 30% last year, but did not occupy a major share. The main reasons for this are as follows: The six-category cabling standards have not yet been officially introduced, fearing that the project will not meet the Six-category Cabling Standards. The price is about 20% ~ more expensive than the five categories ~ 30%; think that the horizontal line over 5 categories can meet the requirements of information network. The introduction of the six types of standards will bring about a new boom in use. As Integrated Wiring is a sustainable development industry, the introduction of six standards will become a new milestone. It is very likely that 1000Base-T and 1000Base-TX technologies will be applied to the desktop system during the lifecycle of the cabling system. To meet the requirements of Gigabit Ethernet, the use of six types of cabling systems that support higher bandwidth, although the use of six types of cables has increased investment, but can greatly reduce investment in network equipment such as NICs and switches. The six types of cables have more than doubled the transmission bandwidth, from 250 MHz to MHz, and their prices will soon decline as the market uses a large amount, for example, the price difference between Category 5 and Category 3 was large in the past, which was basically the same in the later stage.
6 new standards
ANSI/TIA/EIA 568-B Copper Twisted Pair wires 6 standards evolved from ANSI/TIA/EIA 568-A standards, which belongs to the standard series in North America and has been guided by integrated wiring products, after more than 10 versions were finalized, it was officially released in June.
Structure Change
The new 568-B standard consists of three parts: 568-B1 generic cabling system requirements, 568-B2 balanced twisted pair cabling components, and 568-B3 optical fiber cabling components.
General requirements for 568-B1 integrated cabling systems: the new standard includes the design principles and installation guidelines of telecommunication cabling systems related to on-site testing.
-B2 balanced twisted pair cabling components: the new standard includes component specifications, Transmission Performance, system models, and measurement procedures used to verify the telecommunications cabling system.
568-B3 optical fiber cabling components: the new standard includes the component specifications and transmission requirements for optical fiber telecommunication cabling systems.
Key New Projects
In addition to structural changes, the 568-B standard also adds some key new projects.
New Term: change the term "attenuation" to "insertion loss" to indicate the signal loss on the link and channel, and change the TC Between Telecom to the TR of telecom volume.
Medium type: In the aspect of horizontal cable, it is 4 to 100 Ω 3 UTP or SCTP; 4 to 100 Ω over 5 UTP or SCTP; 4 to 100 Ω 6 UTP or SCTP; two or more 62.5/125 μM or 50/125 μM multimode optical fibers. In the trunk cable, it is 100 Ω twisted pair cable, 3 categories or higher; 62.5/125 μM or 50/125 μM multi-mode optical fiber; single-mode optical fiber. The 568B standard does not recognize four pairs of Class 4 and Class 5 cables. 150 shielded twisted pair wires are the accepted media type. However, it is not recommended that you install new devices. Hybrid and multi-strand cables can be used for horizontal cabling, but each cable must meet the corresponding level requirements and meet the special requirements for hybrid and multi-strand cables.
Connection cord, device line, and Jumper: For 24AWG0. the UTP jumper line composed of multiple wires and the rated attenuation rate of the equipment line is 20%, using 26AEG0. 4mm) the attenuation rate of the SCTP cable of the wire is 50%. It is recommended to use multi-strand cables as they are more flexible.
Distance change: Now, for UTP jumper cables and equipment lines, the two ends of the horizontal permanent link are at most 5 M 16 feet) to reach 328 feet m) of the total channel distance. For level-2 trunk lines, the distance from the intermediate hop to the horizontal hop IC to HC is reduced to 300984 feet ). The total distance from the main hop to the horizontal hop MC to the HC still follows the 568-A standard. The device cables and jumper cables connected to other trunk lines in the intermediate jumper shall not exceed 20 m 66 feet) but shall not exceed 20 m 66 feet ).
Installation rules: four pairs of SCTP cables with bending half diameter under non-heavy conditions are set to 8 times the diameter of the cable. The bending radius of two or four optical fibers is 25mm 1 inch under non-heavy conditions, and 50mm 2 inch during the stretching process ). The cable manufacturer shall determine the bending radius requirements of the fiber trunk cable. If the bending radius information cannot be obtained from the manufacturer, the bending radius of the cables inside the building is 10 times the diameter of the cables under non-heavy conditions, and 15 times under heavy conditions. 2-core or 4-Core Optical Fiber tension is 222N501bf ). Category 5 twisted pair wires should be kept within 13mm0. 5 inch) from the end, and category 3 twisted pair wires should be kept within 75mm.
Permanent Link replacement basic link
The permanent link test connection mode and test indicators of horizontal wiring require that the permanent link mode be used by installers and Data Telecom users to authenticate the performance of the permanent cable installation. In the future, the basic link mode will be replaced. A permanent link channel consists of a 90 m horizontal cable and one connector. If necessary, an optional adapter is added. Permanent Link Configuration does not include field tester plug-in cables and plugs ,.
In addition to the test wiring diagram, cable link length, characteristic impedance, DC loop resistance, attenuation, and near-end crosstalk loss, cat5th and cat6 twisted pair wires also have some differences in the test parameters.
Propagation latency
The propagation delay is the extended time of the propagation signal. When channel and basic link propagation are determined, the transmission latency of the connected hardware cannot exceed 2.5ns within the range of 1 MHz to MHz. The maximum propagation latency of all channels cannot exceed 555ns at 10 MHz. The maximum propagation latency of all basic links cannot exceed MHz for 518ns and MHz for 498ns.
Latency offset
Latency offset is the delay difference between the shortest line and the slowest line. The delay offset cannot exceed 1.25ns for cabling per meter. The maximum delay skew of all channels is not greater than 50ns. The maximum latency offset of all types of links cannot exceed 45ns.
Promote high-speed applications
As the most basic construction of the network or the wiring facility of the network Keel, to ensure the efficient operation of the network and support for the future high-speed network, at least five types of cable systems must be selected, we recommend that you select six types of cabling systems for higher requirements, especially for long-term investments. It makes high-speed data transmission easy and users can use cheaper 1000Base-TX devices. Its Transmission Performance is much higher than 5 categories of standards, suitable for applications with the same transmission rate or higher than 1 Gbps, opening the door to the future development of high-speed applications. Category 6 Cabling not only provides a new network application platform, but also greatly improves the service quality from digital voice and video applications to desktops. The introduction of six standards has greatly promoted the development of the telecom industry.
Standard Competition
6 class standard ANSI/TIA/EIA-568-B) officially introduced, without doubt let the manufacturers, testing and service providers, integrators, users in the heart of the "Star ", but is the competition for six standards settled? Since the six standards are North American regional standards, the international standard ISO/iec jtc 25 N655 will not be available until October this year, and when will China's six national standards be released ", there is no time to determine when the corresponding industry standards will be released. It can be seen that, in a sense, the six categories of North America standards can only make the six categories of wiring have a saying.
So when the international standards were introduced in October, European vendors adopted international standards, and North American Vendors adopted North American standards, where should users choose? Generally speaking, international standards are applicable to various regions around the world, so the standards are relatively broad. However, international standards are consistent with North American standards on the six categories of indicators. According to Mr. Xue songshi, a wiring expert, the standard development of the six types of cabling systems was born in Munich in September 1997. At that time, six types of frameworks were formulated, both parties have determined major indicators such as near-end crosstalk and loss. Most importantly, international and North American standards are gradually becoming integrated. Xue songshi cited several examples: North American manufacturers advocate unshielded cables, while European manufacturers advocate shielded cables. in this release of the six types of North American standards, some blocked content has been added as relevant materials. In addition, 62.5/125 μM multimode optical fiber is used in North America, and 50/125 μm multimode optical fiber is used in Europe. All these are included in the six categories of standard in North America.
Of course, when China's six categories of national standards are introduced, any manufacturer can only meet China's standards to sell 6 categories of standards in the Chinese market. So when will our standards be introduced? Xue songshi told reporters that since the idea of setting standards in China is "mature", there has been no new progress since five standards were formulated in 1995. The introduction of the six standards in North America will undoubtedly promote the development of six standards in China. However, China's standards are very strict. After the introduction of international standards in October, We need to comprehensively formulate international standards, North American standards, and China's actual conditions, of course, it will take one or two years for the project to be approved, approved, and reviewed by the State. At that time, users can select products according to the unified national standards, and the competition for six types of standards is truly settled.