What is the network cable crystal head connection? What are the types of network cable crystal head?

A network cable crystal head connection is a method used to connect network cables, often used for Ethernet or other local area network (LAN) connections. A crystal head is a plug that is used to connect a network cable to the network interface of a network device (e.g., computer, router, switch, etc.). Crystal head connections usually follow the following standard, called the TIA/EIA-568 specification: T568A Connection: Use paired orange/white-orange, green/white-green, blue/white-blue, and brown/white-brown wires to connect. The white wire corresponds to the bottom of the solid color wire.T568B Connection: Use the paired orange/white-orange, green/white-green, blue/white-blue, and brown/white-brown wires to connect. The white wire corresponds to the top of the solid color wire. These two connections are slightly different in the order of the pairing wires, but both are able to transfer data normally. In practice, the T568B connection is more common, especially in North America. As for the types of network cable crystal head, there are mainly the following: RJ-45 crystal head: the most common network cable crystal head, used to connect CAT5, CAT5e, CAT6, CAT6a and other network cables. It has 8 metal contacts for transmitting signals and currents from 8 paired wires.RJ-11 Crystal Head: Commonly used for telephone line connections, smaller than the RJ-45 crystal head, with only 6 metal contacts.RJ-12 Crystal Head: Similar to the RJ-11, but with 6 or more metal contacts, usually used for connecting to a multi-line telephone system.RJ-48 Crystal Head: Used for T1 (Digital Transmission 1) lines, similar to RJ-45 but with a different pin layout. These crystal head types are categorized primarily based on differences in their designed use and pinouts. In networks, the RJ-45 crystal head is the most common and widely used type.

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