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The utilization of different cables and their value and utilization
Jul 17, 2017

If we are just outside the line of people, I do not know how much we know about the cable, the two years our speed has been flying general improvement, because there is a cable, we have been the protection of electricity, because there is a cable, we can go to the Internet at home, and network cable. Do you know the difference between the three products?

1. Fiber optic cable
Fiber optic cable is a new generation of transmission media, compared with the copper medium, the fiber, whether in the security, reliability or network performance has been greatly improved. In addition, fiber transmission bandwidth is much more than copper cable, and its support for the maximum connection distance of more than two kilometers, is the formation of a large-scale network of the inevitable choice. Because the optical fiber optic cable has the advantages of good electromagnetic interference, strong confidentiality, fast speed and large transmission capacity, it is also more expensive and seldom used in household. At present, there are two different types of fiber, namely Single-mode fiber and multimode fiber (the so-called "mode" refers to a certain angle into the fiber beam of light). Multimode fibers are generally used for network connections in the same office building or in areas with relatively close proximity. The single mode fiber transmits the data the quality is higher, the transmission distance is longer, is often used to connect the office building or geographically disperses the network. If the use of fiber optic cable as a network transmission media, but also need to increase optical transceiver and other equipment, so the cost of more investment, in the general application of less use.

2 Twisted Pair
Twisted pair is a flexible communication cable, which contains a pair of insulated copper wire, which is characterized by its low price, so it is widely used, such as our common telephone lines. According to the maximum transmission rate, twisted pair can be divided into 3 classes, 5 classes and Super 5 categories. 3 types of twisted pair of $number, 5 classes can reach $number, and Super 5 class is up to 155mb/s above, can be suitable for future multimedia data transmission needs, it is recommended to use 5 or even ultra 5 twisted pair. Twisted pair lines can also be divided into shielded twisted-pair (STP) and unshielded twisted pair (UTP). STP Twisted Line Although the rate is low (only 4mb/s), but anti-interference than UTP twisted pair of strong, so the price is much more expensive, now this kind of twisted pair of wire cheap several yuan a meters, expensive may be more than 10 yuan or more to buy a meters. In contrast, UTP twisted pair line prices are generally around 1.1-meter yuan, relatively inexpensive. In addition, the commonly used 10m and 100m unshielded twisted pair line is called T and T, you can often see in the market. and twisted pair of RJ45 crystal Head, used in the production of twisted pair and network card RJ45 interface between the connector, its quality is directly related to the stability of the entire network, can not be ignored.

3. Coaxial cable
Coaxial cable is a kind of transmission medium familiar to many friends, it is a layer of insulating wire wrapped in the central copper conductor cable, its biggest feature is the anti-interference ability, transmission data stable, and the price is cheap, so once widely used, such as CCTV lines. However, the coaxial cable used more, mainly because the coaxial cable composed of the bus structure network cost is lower, but the damage of single cable may lead to the entire network paralysis, maintenance is also difficult, this is its biggest drawback. The coaxial cable used in Ethernet is divided into two kinds: coarse coaxial cable (10BASE5) and fine coaxial cable (10BASE2). Now the thick coaxial cable is not used much, fine coaxial cable and some markets. Fine coaxial cable Line general market price of several yuan a meters, not too expensive. In addition, coaxial cable is used to connect with BNC head, the market on the coaxial cable is generally sold and BNC connected to the end of the finished product, we can directly choose.

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