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Detailed explanation of the classification and use of optical fiber transceivers

2022-09-20
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Optical fiber transceiver is an Ethernet transmission media conversion unit that interchanges short-distance twisted-pair electrical signals and long-distance optical signals, and is also called a photoelectric converter in many places. The products are generally used in the actual network environment where Ethernet cables cannot cover and optical fibers must be used to extend the transmission distance, and are usually located in the access layer applications of broadband metropolitan area networks; such as: high-definition video image transmission for monitoring and security engineering; Helping to connect the last mile of fiber to the metro and beyond has also played a huge role.

 

Optical transceivers are generally used in practical network environments where Ethernet cables cannot cover and optical fibers must be used to extend transmission distances, and they also play a huge role in helping to connect the last mile of optical fiber to the metropolitan area network and beyond. effect. With fiber optic transceivers, it also provides an inexpensive solution for users who need to upgrade their systems from copper to fiber, for those who lack capital, manpower or time. The function of the fiber optic transceiver is to convert the electrical signal we want to send into an optical signal and send it out. At the same time, it can convert the received optical signal into an electrical signal and input it to our receiving end.

 

Fiber optic transceiver classification

1. According to the nature

According to the nature of the optical fiber, it can be divided into multi-mode optical fiber transceivers and single-mode optical fiber transceivers. The difference between them is that the transmission distance is different. The general transmission distance of multi-mode transceivers is between 2 kilometers and 5 kilometers, while the coverage of single-mode transceivers can be from 20 kilometers to 120 kilometers.

 

2. According to the data sent and received

Single-fiber optical fiber transceivers and dual-fiber optical fiber transceivers are classified according to the required optical fibers. Single-fiber optical fiber transceivers receive and transmit data on one optical fiber; while dual-fiber optical fiber transceivers receive and send data on a pair of optical fibers. transfer up.

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3. According to network management

According to the network management, it can be divided into network-managed fiber optic transceivers and unmanaged fiber-optic transceivers.

 

4. According to the management type

According to the management type, it can be divided into managed Ethernet fiber optic transceivers and unmanaged Ethernet fiber optic transceivers. Managed Ethernet fiber optic transceivers support carrier-class network management, while unmanaged Ethernet fiber optic transceivers use hardware dial The code switch sets the working mode of the electrical port, plug and play.

 

5. According to the way of work

According to the working mode, the full-duplex mode means that when the transmission and reception of data are split and transmitted by two different transmission lines, both parties of the communication can send and receive operations at the same time. This transmission mode is full-duplex. Work system.

 

How Optical Fiber Transceivers Work

Optical transceivers are generally used in practical network environments where Ethernet cables cannot cover and optical fibers must be used to extend transmission distances, and they also play a huge role in helping to connect the last mile of optical fiber to the metropolitan area network and beyond. effect. With fiber optic transceivers, it also provides an inexpensive solution for users who need to upgrade their systems from copper to fiber, for those who lack capital, manpower or time. The function of the fiber optic transceiver is to convert the electrical signal we want to send into an optical signal and send it out. At the same time, it can convert the received optical signal into an electrical signal and input it to our receiving end.

 

Fiber optic transceiver application range

 

1. Realize the interconnection between switches.

 

2. Realize the interconnection between switches and computers.

 

3. Realize the interconnection between computers.

 

4. Transmission relay: When the actual transmission distance exceeds the nominal transmission distance of the transceiver, especially when the actual transmission distance exceeds 120Km, if the site conditions permit, use 2 transceivers for back-to-back relay or use optical- It is a very cost-effective solution for relaying by optical converters.

 

5. Single-multi-mode conversion: When a single-multi-mode fiber connection is required between networks, a single-multi-mode converter can be used for connection, which solves the problem of single-multi-mode fiber conversion.

 

6. Wavelength division multiplexing transmission: When the long-distance optical cable resources are insufficient, in order to improve the utilization rate of the optical cable and reduce the cost, the transceiver and the wavelength division multiplexer can be used together, so that the two channels of information can be transmitted on the same pair of optical fibers.

 

How to use fiber optic transceivers

Because the maximum transmission distance of the commonly used network cable (twisted pair) is very limited, the maximum transmission distance of the twisted pair is generally 100 meters. Therefore, when we are deploying a larger network, we have to use relay devices. Of course, other kinds of lines are used for transmission. Optical fiber is a good choice. The transmission distance of optical fiber is very long. Generally speaking, the transmission distance of single-mode fiber is more than 10 kilometers, and the transmission distance of multi-mode fiber can reach up to 2 kilometers. When using optical fibers, we often use optical fiber transceivers:

 

If you want to know how to use a fiber optic transceiver, you must first know what the fiber optic transceiver does. Simply put, the role of the fiber optic transceiver is the mutual conversion between optical signals and electrical signals. The optical signal is input from the optical port, and the electrical signal is output from the electrical port (common RJ45 crystal connector), and vice versa. The process is roughly as follows: convert the electrical signal into an optical signal, transmit it through an optical fiber, convert the optical signal into an electrical signal at the other end, and then connect to routers, switches and other equipment.

 

Therefore, fiber optic transceivers are generally used in pairs. For example, the optical transceiver (may be other equipment) in the computer room of the operator (Telecom, China Mobile, China Unicom) and the optical transceiver in your home. If you want to build your own local area network with fiber optic transceivers, you must use them in pairs. The general optical fiber transceiver is the same as the general switch. It can be used when it is powered on and plugged in, and no configuration is required. Optical fiber socket, RJ45 crystal plug socket. However, pay attention to the transmission and reception of optical fibers.

 

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