What wires and cables are needed in the information transmission industry?

Optical cables, communication cables, etc., Guda has it.

There are two international standards for the double-crossed wire method: EIA TIA568A and EIA TIA568B, and there are two main ways to connect double-crossed wires: straight-through cables and crossover cables.

Both ends of the water lens of the straight-through cable follow the 568A or 568B standard, and each set of wires of the double-crossed cable is one-to-one at both ends, and the same color is consistent in the corresponding slots of the crystal heads at both ends. It is mainly used in the uplink port of the switch (or hub) to connect the ordinary port of the switch (or hub) or the common port of the switch to connect the computer network card.

One end of the crystal head of the crossover cable follows 568A, while the other end adopts the 568B standard, that is, the A crystal head corresponds to the B crystal head, and the A crystal head corresponds to the B crystal head, which is mainly used in the switch (or hub) ordinary port to connect to the switch (or hub) common port or network card connection card.

Network cables are: copper shaft cable (eliminated).

Category 3 lines (obsolete).

Category 5 (commonly used, divided into Category 5 and Category 5, providing 10-100M transmission).

Category VI (1000m transmission available).

Optical fibers, etc. (commonly used, divided into multimode and singlemode).

Multimode fiber. Multi Mode Fiber: The center glass core is thicker (50 or more), which can transmit multiple modes of light.

However, the intermodal dispersion is large, which limits the frequency at which the digital signal can be transmitted, and it becomes more severe with distance. For example, a 600 km fiber will only have 300 MB of bandwidth at 2 km.

Therefore, the distance of multimode fiber transmission is relatively close, generally only a few kilometers.

Single-mode fiber. Single mode fiber: The central glass core is very thin (typically 9 or 10 m in diameter) and can only transmit one mode of light.

Therefore, its inter-mode dispersion is very small, which is suitable for long-distance communication, but there are also material dispersion and waveguide dispersion, so that the single-mode fiber has higher requirements for the spectral width and stability of the light source, that is, the spectral width should be narrow and the stability should be good.

Fiber optic transmission. The application of fiber optic communication technology has grown rapidly, and since 1977, when the fiber optic system was first installed commercially, the company began to replace the old copper wire system with fiber optic links. Many of today's companies are fully using fiber optics in their systems as a trunk structure and as a long-distance connection between urban systems.

The provider has begun trials with a hybrid fiber optic copper shaft line. This hybrid line allows for the integration of fiber optics and coaxial cables between domains, a location known as a node, that provides an optical receiver that converts light pulses into electrical signals, which are then transmitted to individual homes via coaxial cables. As an appropriate means of communication signal transmission, it is obvious that fiber optics are steadily replacing copper wires, which span long distances between local** systems and provide trunk connections to many network systems.

Optical fiber is a technology that uses glass as a waveguide to transmit information from one end to the other in the form of light. Compared with the transmission medium developed in the early days, today's low-loss glass optical fiber is not limited by bandwidth and has a unique advantage, and the point-to-point optical transmission system is composed of three basic parts: the optical transmitter that generates the optical signal, the optical cable that carries the optical signal, and the optical receiver that receives the optical signal.

Optical fiber is a very convenient tool for transmitting signals, and one of the slender light stamen of the cable can replace more than 1,000 physical communication lines to complete a large number of long-distance communication work. The 8 advantages of optical fiber transmission are as follows:

1. High sensitivity, not disturbed by electromagnetic noise.

2. Small size, light weight, long life, low cost.

3. Insulation, high voltage resistance, high temperature resistance, corrosion resistance, suitable for work in special environments.

4. The geometry can be adjusted according to the requirements of the environment, and the signal transmission is easy.

5. High bandwidth, large communication volume attenuation, long transmission distance.

6. The signal crosstalk is small and boring, and the transmission quality is high.

7. High confidentiality.

8. It is convenient for laying and handling raw materials.

Summary. Trunk optical cable transmission services include: various network application scenarios such as metro area network, wide area network, and data center interconnection; Covering a variety of industries, including finance, telecommunications, medical care, energy, etc.; It provides low-latency and high-bandwidth transmission services to meet the needs of modern enterprises for high-speed data transmission.

At the same time, the trunk optical cable transmission service uses reliable optical cables and high-end equipment to provide high-quality network services and ensure the security and reliability of transmitted data.

Can you add, I don't quite understand it.

Trunk optical cable transmission services include: various network application scenarios such as metro area network, wide area network, and data center interconnection; Covering a variety of industries, including finance, telecommunications, medical care, energy, etc.; It provides low-latency, high-bandwidth transmission and trembling services to meet the needs of modern enterprises for high-speed data transmission. At the same time, the trunk optical cable transmission business uses reliable optical cables and high-end air-pure equipment to provide high-quality network services, which proves the security and reliability of the transmitted data.

The information transmission industry includes the computer industry and the communication equipment industry. The information transmission industry is an industry in which command or status information is transmitted from one end to the other end through a channel and received by the other party. The information cannot be changed during the transmission of information, and the information itself cannot be transmitted or received.

The transmission of information includes both temporal and spatial transmission.

The transmission of time can also be understood as the storage of information that stops the limbs, for example, the ideas of Confucius have been transmitted to the present through books, breaking through the limitations of time, and transmitting from ancient times to modern times. Spatial transmission is commonly referred to as information transmission, such as face-to-face communication in language, chatting with ** or social tools, sending emails, etc., breaking through the limitations of space and transmitting from one terminal to another.