The basic role of the RJ45 connector header

RJ45 plug interface belongs to a fixed direction in accordance with the insertion and automatic prevention of falling out of the plastic connector, commonly known as the "crystal head", the technical term for the RJ45 connector (RJ45 is a network interface specification, similar to the RJ11 interface, is that we usually use the "telephone interface ", used to connect the phone line). The reason why it is called "crystal head" is because of its crystal clear appearance. Both ends of the twisted-pair cable must be installed this RJ45 plug, in order to plug in the network card (NIC), hub (Hub) or switch (Switch) on the RJ45 interface for network communications. Each twisted-pair cable ends by installing RJ-45 connectors (commonly known as crystal head) and network cards and hubs (or switches) connected to the J45 connector crystal head is relatively small, but you can not underestimate it, for the network has an indispensable role in many network failures there is a significant portion of the crystal head because of the poor quality caused by the RJ45 crystal head there are a number of grades of points, the general quality! There are several grades of RJ45 crystal head, the general quality is better, such as Lianxin Technology, high-end connector manufacturers will be more reliable, the price will be higher than some of the miscellaneous brands on the market. In the purchase of RJ45 connectors do not want to be cheap, especially for high quality requirements and meet the standards of the project, the quality requirements will be more stringent, otherwise the quality can not be guaranteed, but also cause unnecessary trouble, the poorer quality of the RJ45 interface is mainly reflected in the contact probes are copper-plated, prone to rust, resulting in poor contact, the network can not be reached and other situations.

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