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First, the crystal head
The crystal head is a plastic joint that can be inserted in a fixed direction and automatically prevents falling off. It is commonly called "Crystal Head". The terminology is RJ-45 connector (RJ-45 is a network interface specification, similar to RJ-11). The interface is the "dian interface" that we usually use to connect the dian phone line. It is called "Crystal Head" because of its crystal clear appearance. The crystal head is suitable for field termination of equipment or horizontal subsystems, and the housing material is made of high density polyethylene. Each twisted pair is connected to the network card and switch through a crystal head at both ends.
Class A B type crystal head production method
We generally have two kinds of cable rules. One is T568B, the other is T568A, and most of us use the B-type connection. The specific cable method is: T568B: "orange white, orange, green white, blue, blue white, green, brown white, brown"; T568A: "green white, green, orange white, blue, blue white, orange, brown white , brown." When making the network cable, we usually have the direct connection method, and the B-type crystal heads at both ends; but in special cases, such as the direct connection of the two machines and the network connection, the cross-connection method is required, and one end is pressed according to the type A of the B-type end. Production process: take the line with the left hand, the thread head facing outward, the order is from left to right, the right hand takes the plug, and the metal piece is inserted upwards into the core. Because it has 8 copper pieces, we usually see 8p on the cable clamp is the mouth of the network cable, and the dian phone line only needs two, so the 4p or 6p crystal head is generally used, the difference and the network cable The crystal head is just the same size.
Second, the network module
What about the network module? I believe that everyone has a home, but it is not self-installed, this is still closely related to us. Each module will have a color matching method for the A/B class line, and the card will be stuck in sequence. The other end only needs to make a class B crystal head plugged into the switch.
Third, twisted pair
Twisted pair is commonly known as the network cable. There are five types and six categories in the mainstream of the market. The six categories are more expensive. Of course, the shielding is better, and it is used more in special environments. Of course, after peeling off the line, the inside is almost the same, 8 lines, two and two twisted, the colors are different. The four pairs of colors are: orange white, orange, green white, green, blue white, blue, brown white, brown. At present, most of our equipments are 100M network ports, so in fact, we only used 4, 8, 2, 3, 6 four lines: orange white, orange, green white, green. The quality of the copper core directly reflects the quality of the network cable, so it is often seen that some people only connect 4 when you connect the network cable.
Fourth, the network cable clamp
The cable clamp function is relatively complete. Generally, it has a port for pressing the dian telephone line and the network cable, and has a stripping knife edge and a scissors. Can make RJ45 network cable, RJ11dian phone connector, 4Pdian phone connector. All the functions of the integrated network cable clamp can facilitate the cutting, pressing and stripping operations. Hardened and blackened for a lightweight and sturdy body. The key is that this is a cheaper home to prepare for a later problem at any time. It is very simple to use and will be used by hand. Online search is also a big radish.
Five, line finder
After the final network cable is completed, we need to judge whether the network cable is good. We introduce you to a tool---the line-Finder. This tool can be used both for measuring lines and for finding lines. This tool can be said to be a necessary tool for weak people. It is not expensive. You can measure both the network cable and the dian phone line. After the crystal head is inserted into the instrument, the indicator light will indicate whether each line is communicating normally.