Seven types of cabling systems: Broadband Selection

High-bandwidth applications require the latest Network Cabling Technology. The cat6 cabling system meets today's commercial applications with its MHz bandwidth. According to the latest news, the TR42 Committee of TIA (Telecommunications Industry Associations) has passed the Six-class standard 568B-B.2.1, which will be officially promulgated by TIA on June 18.
However, the technology is still improving. It is only a matter of time that the MHz bandwidth cannot fully meet people's needs.
As a result, standard-setting organizations and manufacturers are considering using a new copper system with a bandwidth of up to 600 MHZ, which is called a seven-class cable, using this system can greatly expand LAN functions.
Before discussing the technical details of seven types of cables, we should first review the development history of cable standards and the current types of cables.
Precision cable standards are used to establish a series of general procedures between product suppliers and users. Some standards can be used to determine whether a product can be sold in certain countries through the setting of standards.
In North America, standards are primarily promulgated by the following three organizations:
ANSI (American National Standard Institute, Organization for Standardization of the United States );
TIA (Telecommunication Industry Association, telecommunications Industry federation );
Engineering Association (EIA ).
Generally, one of the organizations issues a standard, which is then corrected by the other two organizations.
In Europe, cable standards are published by CENELEC European Electronic Technology Standards Commission (EC) and Members of this Organization are from electronic technology committees in 19 European countries. ISO/IEC will adopt the CENELEC standard as the ISO/IEC standard.
TIA and ISO have made great efforts to coordinate their respective standards, so there is almost no difference between the standards promulgated by TIA and ISO. Since manufacturers of cables, connectors and cable verification testers generally distribute their products worldwide, manufacturers must prove that their products comply with EIA/TIA/ANSI (and CENELEC).
1-6 Cabling Systems
Different twisted pair categories represent the rate at which the system can provide.
Maximum Transmission Rate of cable category
Class 1 CAT1) Analog voice signal below 1 Mbps
Category 2 CAT2) 4 Mbps IBM cabling system for the licensing Ring
Class 3 CAT3) 16 Mbps 10Base-T Ethernet
Class 4 CAT4) 20 Mbps card ring
Category 5 CAT5) 100 Mbps 100Base-T Ethernet
1000 Mbps (4 pairs)
Over 5 CAT5E) 100 M bps Ethernet, ATM
155 Mbps
CAT6)-25om broadband applications
What are the differences between seven types of systems?
There are many significant differences between cat6 and cat7 cabling systems. The most obvious difference is bandwidth. The six channels provide a bandwidth of at least MHz for comprehensive attenuation to the crosstalk ratio and MHz for the whole. Seven systems can provide at least MHz of overall attenuation to the crosstalk ratio and MHz of overall bandwidth.
A large number of broadband applications have prompted people to need more bandwidth. For example, a typical seven-channel can provide 8-MHz bandwidth to transmit video signals, analog audio signals are transmitted on the other line, and high-speed LAN information is transmitted on the third and fourth lines. This application sounds like a scientific fantasy, but it will become a reality in the near future.
Another difference between cat6 and cat7 systems is their structure. UTP or STP can be used for cat6 cabling systems. The seven types of systems are only based on shielded cables. Among the seven types of cables, each line has a shielding layer, and the four pairs are combined with a public large shielding layer. In terms of physical structure, the extra shielding layer makes the seven cables have a large wire diameter.
There is also an important difference in the hardware connection capability. The seven-class system parameters require that all lines of the connection header provide at least 60 dB of Integrated near-end string winding at MHz. The cat5e system only requires 43DB at MHz, and cat6 requires 46DB at MHz.
Connector and Tester
People who are pessimistic about the seven types of systems often stick to the following points:
1. Manufacturer of seven types of cables and connectors cannot meet the requirements of seven types of systems;
2. After installing a new seven-class system, people cannot ensure that the system runs well throughout the entire range, because there is no tester capable of testing all bandwidth ranges.
How long does cable and connector manufacturers need to meet the needs of six types of systems in a short period of time before they can provide stable seven types of systems? Simon's connector on) has developed a new type of connector interface to go beyond the limitations of the RJ connector header. This connector, known as the connector, has been selected as a non-RJ connector by the ISO/iec jtc 1/SC 25 workgroup. Siemen has applied for a license connector patent from multiple manufacturers. Currently, the performance of the Seven-class system has exceeded the requirements of the Seven-class draft for connectors, cables, links and channels.
In addition, a handheld LAN tester has been used to test the full-band bandwidth of seven types of systems (0-600 MHZ). The maximum testing bandwidth is 750 MHZ. In addition to 7 types of tests, this tester can also be used in 3 categories, 5 categories, 5 categories and 6 categories of systems, and also has the function of optical fiber testing. With these new testers, cable installers and end users will not rely solely on cable and connector manufacturers to promise MHz bandwidth for their products in the future. Currently, each link can be verified independently after installation, meeting the needs of the manufacturer, installer and end user.
Some people think that the optical fiber system can bring enough bandwidth to people, and the optical fiber has a certain price advantage. However, considering the cost of Optical Fiber routers, switches, and NICs, the price advantage of optical fiber will soon be lost.
It is certain that, with the launch of seven standards at the end of this year, high-quality cable products and connectors and LAN cable testers with a tested bandwidth of up to MHz will bring great convenience and potential to people's broadband applications.