At present, twisted pairs commonly used in LANs are generally unshielded Category 5 4 pairs (ie 8 wires) of cable. The twisted pair transmission rate can reach 100Mbps. The three types of twisted pair outer protective rubber tapes sold on the market are thin, the words "CAT3" are marked on the rubber, and the words "Category 3" are marked on the outer packing carton, and the selling price is relatively low; the protective rubber of the outer layer of the Category 5 twisted pair is thick The words "CAT5" are marked on the rubber and the words "Category 5" are marked on the outer carton. The price is higher. Do not buy cheaper, cheaper Category 5 twisted pairs. These products are often used only as Category 3 twisted pairs.
Super 5 twisted pair is unshielded twisted pair. Compared with the ordinary Category 5 twisted pair, Super Category 5 twisted pair has less attenuation at the time of transmitting signals, and has stronger anti-interference ability. In the 100M network, the user equipment is only 1/4 of the interference level of the common Category 5 cable, which is an ideal solution for network applications.
"Ultra-five" means ultra-five unshielded twisted pair
Unshielded twisted pair cables consist of pairs of twisted pairs and a plastic sheath. The five categories refer to the five different quality levels defined by the International Association of Electrical Industries for twisted pair cables.
The Category 5 unshielded twisted pair is a cable that appears after the performance of the existing five types of shielded twisted pair is improved. Many performance parameters, such as near-end crosstalk, attenuation crosstalk ratio, and return loss, are available. Improved, but its transmission bandwidth is still 100MHz. Ultra-five twisted pairs also use four pairs and one tensile cable. The color of the pair is exactly the same as the five types of twisted pair. They are white orange, orange, white green, green, white blue, blue and white. Brown and brown. Bare copper wire diameter is 0.51mm (wire gauge is 24AWG), insulated wire diameter is 0.92mm, and UTP cable diameter is 5mm.
Ultra-Five twisted pair cables are usually used only for 100Mb/s Fast Ethernet to connect desktop switches to computers. If you want to upgrade your network to Gigabit Ethernet later, you may wish to use a Category 5 unshielded twisted pair cable for horizontal cabling. Super Category 5 unshielded twisted pair can also provide up to 1000Mb/s transmission bandwidth, but often requires the support of expensive special equipment.
"Six types" refers to six unshielded twisted pairs
All parameters of the six types of unshielded twisted pair have been greatly improved, and the bandwidth has also been expanded to 250MHz or higher. Six types of twisted pair are different in appearance and structure from Cat. 5 or Cat. 5 twisted pairs. They not only increase the cross frame of the insulation, but also place the four pairs of twisted pairs in the cross frame. Grooves, and the diameter of the cable is also thicker.
The cross frame in the center of the cable rotates with the change of length, and the four pairs of twisted pairs are caught in the groove of the skeleton to maintain the relative position of the four twisted pairs, thereby improving the balance characteristics and crosstalk attenuation of the cable. In addition, ensure that the balanced structure of the cable is not damaged during the installation. The unshielded twisted pair bare copper wire diameter is 0.57mm (wire gauge is 23AWG), the insulated wire diameter is 1.02mm, and the UTP cable diameter is 6.53mm.
In accordance with the different electrical properties, twisted pair can be divided into three types, five types, super five, six and seven twisted pair. Different types of twisted-pair prices vary widely or even vary widely, and the scope of application is also very different.
In addition to the traditional voice system still using three types of twisted pair, the network cabling is currently using ultra-five or six types of unshielded twisted pair. Although five types of unshielded twisted pair can still support 1000Base-T, they are gradually out of the cabling market because they are almost the same in price as the ultra-five unshielded twisted pair. Although the price of Category 6 unshielded twisted pair is relatively high, but because it has very good compatibility with Super Category 5 cabling system and can support 1000Base-T very well, it is slowly becoming the new darling of integrated cabling. Because it is a brand-new cabling system, the seven types of shielded twisted pair cables have excellent performance but are expensive. Construction is complex and there are few products to choose from, so it is rarely used in wiring projects.
Category 6 unshielded twisted pair can very well support Gigabit Ethernet and achieve a 100m transmission distance. As a result, Category 6 cabling systems are widely used in the wiring of sub-server rooms, and horizontal cabling that retains the ability to upgrade to Gigabit Ethernet.
According to the international wiring standard ISO11801, the life expectancy of the wiring system is at least 10 years. As a long-term basic investment, integrated cabling should fully consider the potential demand of the network and the development of the cabling system. Therefore, under the conditions that the funds allow, it is recommended to select six types of products to construct the cabling system.
If you consider the application requirements of the network in the future, you should theoretically install the most advanced cabling products, because it is often difficult to renew the replacement after installing cables. Basically, a cabling system must be applied for at least 10 years as a standard, and it can support 4 to 5 generations of networks. The performance of the device is updated, if future network devices need better cables to increase data speed.
Then, replacing Category 5e cables with Category 6 cables is unavoidable. However, these cable re-engineering projects are very expensive. Therefore, even if the prices of the six categories of products are slightly more expensive than those of the Super V, they will reduce future network upgrade issues. Six categories of products are still worth considering.
The difference between five categories and six categories
The difference between five categories and six categories
The five-category line is identified by "CAT5" and has a bandwidth of 100M. It is suitable for networks below 100M. The SuperCat 5 line is identified by "CAT5E" and has a bandwidth of 155M. It is currently the mainstream product; the category 6 line is identified by "CAT6". , bandwidth 250M, used to set up Gigabit network, is the trend of future development.
"Ultra-five" means ultra-five unshielded twisted pair
Unshielded twisted pair cables consist of pairs of twisted pairs and a plastic sheath. The five categories refer to the five different quality levels defined by the International Electrical Industry Association for twisted pair cables.
The Category 5 unshielded twisted pair is a cable that appears after the performance of the existing five types of shielded twisted pair is improved. Many performance parameters, such as near-end crosstalk, attenuation crosstalk ratio, and return loss, are available. Improved, but its transmission bandwidth is still 100MHz.
Ultra-five twisted pairs also use four pairs and one tensile cable. The color of the pair is exactly the same as the five types of twisted pair. They are white orange, orange, white green, green, white blue, blue and white. Brown and brown. Bare copper wire diameter is 0.51mm (wire gauge is 24AWG), insulated wire diameter is 0.92mm, and UTP cable diameter is 5mm.
Although Super Category 5 unshielded twisted pair can also provide transmission bandwidth of up to 1000Mb/s, it often requires the support of expensive special equipment. Therefore, it is usually applied only to 100Mb/s Fast Ethernet to implement the connection from a desktop switch to a computer. If you do not plan to upgrade your network to Gigabit Ethernet later, you may wish to use a Category 5 unshielded twisted pair cable for horizontal cabling.
"Six types" refers to six unshielded twisted pairs
All parameters of the six types of unshielded twisted pair have been greatly improved, and the bandwidth has also been expanded to 250MHz or higher. Category 6 twisted pairs have certain differences in appearance and structure from Cat 5 or Cat 5 twisted pairs. They not only increase the cross frame of insulation, but also place the four pairs of twisted pairs in the cross frame. Grooves, and the diameter of the cable is also thicker.
The cross frame in the center of the cable rotates with the change of length, and the four twisted pairs are trapped in the groove of the skeleton, maintaining the relative position of the four twisted pairs, thereby improving the balance characteristics and crosstalk attenuation of the cable. In addition, ensure that the balanced structure of the cable is not damaged during the installation. The unshielded twisted pair bare copper wire diameter is 0.57mm (wire gauge is 23AWG), the insulated wire diameter is 1.02mm, and the UTP cable diameter is 6.53mm.
Super five or six
In accordance with the different electrical properties, twisted pair can be divided into three types, five types, super five, six and seven twisted pair. Different types of twisted-pair prices vary widely or even vary widely, and the scope of application is also very different.
In addition to the traditional voice system still using three types of twisted pair, the network cabling is currently using ultra-five or six types of unshielded twisted pair. Although five types of unshielded twisted pair can still support 1000Base-T, they are gradually out of the cabling market because they are almost the same in price as the ultra-five unshielded twisted pair.
Although the price of Category 6 unshielded twisted pair is relatively high, but because it has very good compatibility with Super Category 5 cabling system and can support 1000Base-T very well, it is slowly becoming the new darling of integrated cabling. Because it is a brand-new cabling system, the seven types of shielded twisted pair cables have excellent performance but are expensive. Construction is complex and there are few products to choose from, so it is rarely used in wiring projects.
Category 6 unshielded twisted pair can very well support Gigabit Ethernet and achieve a 100m transmission distance. As a result, Category 6 cabling systems are widely used in the wiring of sub-server rooms, and horizontal cabling that retains the ability to upgrade to Gigabit Ethernet. According to the international wiring standard ISO11801, the life expectancy of the wiring system is at least 10 years. As a long-term basic investment, integrated cabling should fully consider the potential demand of the network and the development of the cabling system. Therefore, under the conditions that the funds allow, it is recommended to select six types of products to construct the cabling system.
If you consider the application requirements of the network in the future, you should theoretically install the most advanced cabling products, because it is often difficult to renew the replacement after installing cables. Basically, a cabling system must be applied for at least 10 years as a standard, and it can support 4 to 5 generations of networks. The performance of the device is updated, if future network devices need better cables to increase data speed.
Then, replacing Category 5e cables with Category 6 cables is unavoidable. However, these cable re-engineering projects are very expensive. Therefore, even if the prices of the six categories of products are slightly more expensive than those of the Super V, they will reduce future network upgrade issues. Six categories of products are still worth considering.
"Super six"
BeldenIBDN developed a high-performance cabling system that can still operate normally at a temperature above 40°C. At the end of 1999, it officially launched the IBDN4800LX system. Its final target reaches 300MHz bandwidth, and it can still meet the 20°C specified by Category 6 standards at 50°C. Performance. In order to distinguish it from the ordinary Category 6 cabling system, this kind of cabling whose bandwidth performance exceeds Category 6 is called Super Category 6.
Most of the Category 6 cabling use the same modules and jumpers as the Category 6 cabling, so their main difference is in the cabling. IBDN's Super Category 6 cable 4800LX has been targeted for normal operation at a relatively high temperature from the very beginning, so one of its cable construction features is the large wire diameter, and the diameter of the transmission conductor is 0.5mm (24AWG) from the normal 6 class. Increased to 0.6mm (23AWG); there are also some manufacturers in the beginning of the Super 6 cable 24AWG and try to improve the NEXT method, but in 2002 to improve the cable diameter to 23AWG. Another feature is the addition of a cross-shaped pair of dividers between the four twisted pairs. Without cross separation, a pair of wires in the cable may be trapped in the gap between the two wires of the other pair of wires. The spacing between pairs is reduced and crosstalk is aggravated. The separator strip also tightly fixes the four pairs of wires together with the sheath of the cable in its designed position, and can mitigate the looseness of the pair of wires brought about by the bending of the cable, thereby reducing the performance degradation during installation. The 4800LX is the first Super Category 6 cable to use a cross divider. The later cable clusters follow a similar pattern.
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