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This article mainly introduces what the network cable standard is in the computer network, the article is very detailed, has a certain reference value, interested friends must read it!

Network cable standards: 1. There are two standards for network cable termination, which are T568A and T568B. There are also two main connection methods of twisted pair, namely straight-through cable and crossover cable.

Network cable standard:

There are two standards for network cable termination: T568A and T568B, and there are two main connection methods for twisted pair: straight-through cable and crossover cable.

Both ends of the crystal head of the straight-through cable follow the T568B standard, each set of twisted pair is one-to-one corresponding at both ends, and those of the same color are consistent in the corresponding slots of the crystal head at both ends. It is mainly used in the switch (or hub) Uplink port to connect the switch (or hub) ordinary port or the switch ordinary port to connect the computer network card.

The crystal head of the crossover cable follows 568A at one end, while the other end adopts the 568B standard, that is, the 1,2 of the A crystal head corresponds to the 3,6 of the B crystal head, while the 3,6 of the A crystal head corresponds to the 1,2 of the B crystal head. it is mainly used in the switch (or hub) ordinary port connected to the switch (or hub) ordinary port or network card connected to the network card.

When terminating horizontal wires in comprehensive wiring engineering, GB 50312 accepts T568B or T568A, but does not allow simultaneous installation, usually according to T568B.

Extended data:

The network cables are classified as follows:

1. Class I cable: it is mainly used for voice transmission (a kind of standard is mainly used for telephone cables before the early 1980s), which is different from data transmission.

2. Class II line: the transmission frequency is 1MHZ, which is used for voice transmission and data transmission with the highest transmission rate 4Mbps. It is common in old token networks that use 4MBPS token passing protocol.

3. Category III cable: refers to the cable currently specified in ANSI and EIA/TIA568 standards. The transmission frequency of this cable is 16MHz, which is used for voice transmission and data transmission with the highest transmission rate of 10Mbps. It is mainly used for 10BASE--T.

4. Category IV cable: the transmission frequency of this kind of cable is 20MHz, and the data transmission of voice transmission and maximum transmission rate 16Mbps is mainly used in token-based LAN and 10BASE-T/100BASE-T.

Category 5: this kind of cable increases the winding density and covers a high-quality insulating material with a transmission rate of 100MHz. It is used for voice transmission and data transmission with the highest transmission rate of 10Mbps, mainly for 100BASE-T and 10BASE-T networks. This is the most commonly used Ethernet cable.

6. Super Category 5 lines: Super Category 5 has less attenuation, less crosstalk, higher ratio of attenuation to crosstalk (ACR) and signal-to-noise ratio (Structural Return Loss), smaller delay error, and the performance is greatly improved. Super Category 5 lines are mainly used for Gigabit Ethernet (1000Mbps).

7. Category 6 cable: the transmission frequency of this kind of cable is 1MHz~250MHz, and the comprehensive attenuation crosstalk ratio (PS-ACR) of type 6 wiring system in 200MHz should have a large margin, which provides 2 times the bandwidth of more than category 5.

The above is all the contents of the article "what is the Network Cable Standard in the computer Network". Thank you for your reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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