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The difference between optical cable, optical fiber, twisted pair wire and cable

Information Source:Henan Huadong Cable Co., Ltd  Release date:2014-02-21

In the network hardware, there is a kind of can not be ignored is the network transmission medium, we usually known as the wire. At present, the more common wire into fine twisted pair, coaxial cable and optical fiber cable, coaxial cable, crude.

1 The optical fiber cable

Optical fiber cable is the transmission medium, a new generation, as compared with copper media, optical fiber both in safety, reliability and network performance has been greatly improved. In addition, the optical fiber transmission bandwidth than copper cable, and the maximum connection from the support of more than two kilometers, is the inevitable choice for building large scale network. For optical fiber has the advantages of resistance to electromagnetic interference, high security, high speed, large transmission capacity and so on, so the price is more expensive, is rarely used in the home. At present, the more common there are two different types of fiber, respectively is the single-mode fiber and multimode fiber (the so-called "die" refers to a beam of light into a fiber with a certain angle). Multimode fiber is generally used in the same office or relatively close distance from the area of the network connection. While the single mode optical fiber data transmission of higher quality, longer transmission distance, are used for connection between office buildings or geographical spread more widely network. If the use of optical fiber and cable as transmission medium, also need to increase the optical transceiver and other equipment, so the cost is larger, with less in general use.

2 The twisted pair communication cable

The twisted pair communication cable is a flexible, contains insulated copper wire pairs, it is characterized by low price, so it is widely used, such as our common telephone line. According to the maximum transmission rate of different, twisted pair can be divided into 3 classes, 5 classes and 5. Rate of Category 3 twisted pair for the 10mb/s, 5 to 100mb/s, and 5 is as high as 155mb/s or more, can be suitable for the needs of future multimedia data transmission, so the recommended 5 or even 5 super twisted pair. Twisted pair can also be divided into the shielded twisted pair (STP) and unshielded twisted pair (UTP). STP double strand although rate is low (only 4mb/s), but the anti disturbance than UTP twisted pair is strong, so the price is also more expensive, now this kind of twisted pair cheap a few yuan a metre, expensive, probably more than a dozen yuan to buy a m. In contrast, UTP double strand general price in a m a yuan, relatively low. In addition, the commonly used 10m and 100m non pop crooner shielded twisted pair is 10Base-T and 100Base-T, you can often see in the market. And the twisted pair matched and the RJ45 crystal head, used in the production of joint of twisted pair and RJ45 card interface, its quality is directly related to the stability of the whole network, can not be ignored.

3 Coaxial cable

Coaxial cable is a type of transmission medium, many of my friends are more familiar with, which is composed of a layer of insulated wire wrapped around the central copper conductor cable, it is the biggest characteristic of good anti-interference ability, data transmission stability, but the price is cheap, so once widely used, such as closed-circuit television lines. However, before the coaxial cable is widely used, mainly because the bus network structure composed of low cost coaxial cable, but the damage a single cable can lead to paralysis of the entire network, maintenance is difficult, this is the biggest drawbacks. Coaxial cable Ethernet applications mainly divided into thick coaxial cable (10BASE5) and thin coaxial cable (10base2) two. Now thick coaxial cable with not much, thin coaxial cable also some market. Fine coaxial cable general market price of a few million meters, not too expensive. In addition, the coaxial cable is used to connected with BNC head, the market sells coaxial cable is generally has and BNC head connected well finished, we can directly use.

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