Cat5

Five kinds of line (0.5 data communication lines) is a kind of communication data and voice communications business information such as multimedia wire, is widely used in broadband users stations nets etc broadband access project, the quality is superior, directly related to the transmission quality of information communication. Users often complain about Internet speed is slow, "five kinds of line" poor quality is one of the important reasons.

Five kinds of line applicable transmission range

Five kinds of line apply to 100Mbps high-speed data transmission

To correctly identify five categories twisted-pair cable

Along with the fast Ethernet standard launch and implementation, 5 kinds of twisted-pair cable began to widely applied to network cabling. But because the individual manufacturer on advertising and Internet firms of misleading, and part of the network users to the lack of necessary understanding relevant standards, leaving in selecting five categories when twisted-pair rock-solid resembles, helpless. However, once chosen not conforming five categories twisted-pair cable, on the one hand, will make the network performance down, on the other hand for future network upgrades the 1950-60s.

In addition to the composed twisted-pair cable lines of two insulated copper wire to conducted as per requirement, standard around the twist of the line twisted-pair cable between directions to counterclockwise around the twist. Or will cause cable resistance mismatch, limiting the transmission distance. TIA/EIA SCTS (TIA/EIA 568 is formulated in 1996, the ANSI muting standard that says network cabling about infrastructure, including cable, connecting equipment content. The letter "A" expressed as IBM's wiring standard, and AT&T company with the letter "B" said.) In the specific provisions.

Ethernet in use twisted-pair cable as transmission medium to only need 2 (4 core) line can complete the sending and receiving signal. In the use of twisted-pair cable as transmission medium to fast Ethernet exist in three criteria: 100Base - TX, 100Base - T2 and 100Base - T4. Among them: 100Base - T4 standard requires use of all of the signal transmission of line 4, another two standard only request for line. And in the most popular fast Ethernet is 100Base - TX standards. American cable standard (AWG) for 3 class, in four kinds of and 5 kinds of and super five categories twisted-pair cable are defined as 4 pairs, in gigabit Ethernet is required to line using all four to communicate. So, the standard five kinds of cable should have four lines.

Five kinds of line, refers to the classification of string

Twisted-pair cable according to electrical performance, usually divided into three words, four class, : five categories, super five categories, six types, seven class twisted-pair cable type etc, in principle, the greater the version number the new, the higher the technology is advanced, the bandwidth is also more wide, of course the price is also more expensive. We choose and buy for LAN is normally the choose and buy when wires five categories or super five kinds of string, because three, four class twisted-pair cable is commonly used in 10M/BPS Ethernet, and five categories twisted-pair cable can satisfy now increasingly popular of the 100M/BPS, super five categories of Ethernet is mainly used for future twisted-pair online, but now also the gigabit LAN, commonly used in price than five classes because your not how much, line has now six types of lines, general for ATM network, the company LAN is not recommended for adoption. At present three, four kinds of line are currently on the market has almost no, if has, also not in three or four class lines appear, but over five categories, even super five kinds of line, which is currently selling fake five kinds of line most kind. Currently in general LAN common is five categories, super five class or six types of the shielding twisted-pair cable, especially the current super five categories and six types of the shielding twisted-pair cable can easily provide 155Mbps communications bandwidth, and have to upgrade to gigabit bandwidth potential, therefore, become the preferred cable current level wiring. But twisted-pair cable and can be divided into: shielding twisted-pair cable and the shielded twisted-pair cable, most lans use a shielding twisted-pair cable (Pair) Unshielded UTP - it as the wiring netting transmission medium to long distance, by string twisted-pair RJ45 head with composed.

Super five categories twisted-pair cable

Shielded twisted-pair five categories of the bread with a layer of shielding the anti-jamming ability of the metal film, it better. There may be the reader will ask why not using shielded twisted-pair five classes? This is because shielded twisted-pair cable requires that the whole system are all shielding device, including cable, socket, crystal head and distribution frames, etc, and the buildings need to have good grounding system. But in actual construction, difficult to all, thus make perfect grounding shield itself to become the largest interference sources, leading to even as far as the performance of shielded twisted-pair cable UTP. So, unless there is a special needs, usually in the integrated wiring system adopts the shielded twisted-pair cable only.