Twist-Pairfrom eight different colors divided into four pairs of lines strands together, paired twist minimize the role of external electromagnetic radiation and electromagnetic interference. In the EIA/TIA-568 standard, Twist-Pairby electrical characteristics divided into: cat3, cat4, cat5 cable. Network is the most commonly used cat3 lines and cat5 cable, there are cat6 cableabove.
Do a good job of the network cableto RJ45cable connectorsaccess card or HUB, such as network equipment within the RJ45 socket. Block corresponding RJ45 plugs are divided into cat3 or cat5 cable electrical characteristics. RJ45 crystal from the first pieces of metal and plastic production network cable posed by the needs of RJ-45 connectors front of a crystal eight groove, the "8 P" (Position location). Contact metal groove of a total of eight, the "8 C" (Contact contact , the industry of this "8 P8C" another said. Attention to the special needs of the first-pin serial RJ45 crystal metal face when Our time from left to right-pin serial number is the serial number from 1 to 8 the network connection is very important not wrong.
Twist-Pair the greatest transmission distance of 100 m. To increase the transmission distance, the two Twist-Pair can be installed between the repeaters, can be installed up to four repeaters. Such as the installation of four repeaters network connecting five, the maximum transmission distance is up to 500 m.
EIA / TIA cabling standards provides for two Twist-line sequence Pair 568 A and B 568.
A standard 568: Green and White 1, Green 2, orange white-3, blue-4, blue-5, Orange 6, brown-white-7, brown -8
Standard 568 B: orange white -1, orange-2, Green and White-3, blue-4, blue-5, Green 6, brown-white-7, brown -8
In order to maintain the best compatibility, commonly used by EIA / TIA 568B standards in the production network cable. Throughout the application of a network cabling wiring, but there are two ends of the RJ-45 jack connect to the network either through the standard 568 A, 568 B or standards in the network are feasible.
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