【 Weak current College 】 seven types of wiring systems: broadband choices

High-bandwidth applications need most new network wiring technology, six types of wiring system with its 250MHZ bandwidth for today's business applications. Latest message indicates that TIA (TelecommunicationsIndustryAssociations) TR42 Committee has adopted six types of standards, the standards will 568B-B.2.1 on June 18 formally promulgated by TIA.
However, technology is still in progress, 250MHZ bandwidth does not adequately meet the needs of the people was only a matter of time.
Therefore, the standard setting body and the manufacturer is considering using a new type of copper cable system, its bandwidth can be as high as $ 600MHZ, people will this system called the seven kinds of cables, this system can greatly extend the functionality of a local area network.
In exploring the seven kinds of cables technical details before we began by recalling cable standard history and current cable category.
Sophisticated cable standard used to product suppliers and users to establish a common practice for serialization, some standards you can adopt guidelines setting to determine whether a product can be sold in certain countries.
In North America, the standard mainly consists of the following three organizations issued:
ANSI (AmericanNationalStandardInstitute, United States national standards organization);
TIA (TelecommunicationIndustryAssociation, Telecom Industry Federation);
EIA (EngineeringInstituteAssociation, engineering technology).
Typically, one of the promulgation of a standards organization, then the other two organizations.
In Europe, cable standard by CENELEC (European electronic technology standards Committee), Member of the organization comes from the European 19 countries of electronic technology. ISO/IEC will adopt the CENELEC standards as ISO/IEC standards.
TIA and ISO have made many efforts to coordinate their standards, therefore, TIA and ISO released standards there is little difference. As cables, connectors and cable verification Tester manufacturers usually worldwide distribution of their products, the manufacturer must demonstrate that their products conform to ANSI/TIA/EIA (and CENELEC) standards.
1-6 types of wiring system
Different twisted pair class represents the system can provide.
Cable category maximum transfer rate application
1 class (CAT1) less than 1Mbps analog voice signal
Class 2 (CAT2) 4Mbps for token ring of IBM cabling system
3 class (CAT3) 16Mbps10Base-T Ethernet
4 classes (CAT4) 20Mbps token ring
Category 5 (CAT5) 100Mbps100Base-T Ethernet
1000Mbps (4 pairs)
Hyper-5 class (CAT5E) 100Mbps Ethernet, ATM
155Mbps
Category 6 (CAT6) 200-25OM broadband applications
Seven class system?
Six and seven types of wiring systems there are many significant differences, most notably the bandwidth. Six types of channel provides comprehensive at least 200MHZ attenuate on crosstalk ratio and overall 250MHZ bandwidth. Seven categories system can provide at least 500MHZ integrated attenuation on crosstalk ratio and a overall bandwidth.
A large amount of wideband applications enable people need more bandwidth. For example, a typical seven channel can provide a snapline 862MHZ bandwidth to transmit video signals, on the other line on the transmission of analog audio signal, and then in the third and fourth lines for high-speed local area network information transmission. This application now sounds like a science fiction, but in the near future you can become a reality.
Six and seven class system of another difference is their structure. Six types of wiring systems can use UTP and STP can also be used. The seven system based solely on shielded cable. In seven categories in the cable, each line has a shield, four pairs of wire gathers together a public big screen. From the physical structure of the point of view, additional shielding layer makes seven categories line has a larger diameter.
Another important difference is that the capacity of its connectivity hardware, seven categories of system parameter requires a connection header in the line when all 600MHZ to provide at least 60DB of proximal crosstalk. But hyper-v class system provides only requires 100MHZ 43DB, six class in numerical-46DB 250MHZ.
Connection head and tester
On seven categories of system pessimistic people always adhere to the following points:
1, seven kinds of cables and connecting devices manufacturer cannot meet the demand of seven categories of system;
2. people install a new set of seven categories of systems cannot guarantee that the system in the entire range are running well, because no one can test all bandwidth range of test equipment.
Cable and connector manufacturers need in a very short period of time to meet the needs of six kinds of large, then the system who need more time to provide a stable seven class system?, Simon company (Siemon) has developed a new type of connector interface to surpass RJ connector restrictions. This is called Tera connector has been ISO/SC25 working group selected IECJTC1/non-RJ-type connector. Siemen company has a number of manufacturers have applied for a patent of Tera connector. The current seven types of linesCommission, its performance has exceeded seven draft for connectors, cables, link and channel.
In addition, there are already holding a LAN tester for seven categories of system-wide frequency band range test (0-600MHZ), its biggest test bandwidth of up to 750MHZ. In addition to the seven class test, the tester can also be used for 3, 5, 5, and 6 classes of systems, also has fibre test functionality. With these new tester, cable installers and end users will not be solely dependent on cable and connector manufacturers for its product 600MHZ bandwidth commitment. Currently, each link can be installed after the individual validation, meet manufacturers, installers and end users demand.
Some people might think the optical system can bring enough bandwidth, and fibre has a price advantage. However, if you consider to fiber optic routers, switches and network cards cost factors, fibre price advantages will be quickly lost.
To be sure, with the seven standards of launch at the end of the year, high-quality cable products and connector and test bandwidth of up to 750MHZ LAN cable Tester will give the people of broadband applications bring great convenience and possible.