The purpose of the four pairs of cores in the network cable
The four pairs of cores in the network cable are mainly used to transmit data, and each pair of cores consists of two wires twisted together to reduce electromagnetic interference.
The basic structure of the network cable consists of four pairs (8 cores), each pair of cores consists of two wires, and the two wires are twisted together to reduce electromagnetic interference. Each core has a specific color, which is used to distinguish and connect different devices. In the currently widely used 100M network, only 4 of the cores are actually used, namely the 1st, 2nd, 3rd, and 6th, which play the role of sending and receiving signals respectively. The arrangement and connection method of these four cores are determined according to specific standards (such as the T568B standard) to ensure stable transmission of the network.
The main purpose of using 8 cores is to reduce electromagnetic interference and improve transmission rate and stability. When making a crystal head, it is recommended to make it according to the standard 8 cores to ensure the stability of the network speed. Although in some lower-speed network applications, such as networks below 100M, only 4 cores may be needed to meet the needs, in high-speed network transmission, in order to ensure the stability of network operation, all 8 cores are usually required.
In addition, although the network cable has 8 cores, in actual applications, some cores may be reserved or used for other purposes, such as telephone lines. Understanding these basic structures and uses is essential for correctly connecting and using network devices.