With the rapid development of network construction, the demand for data, voice and image digital communication is becoming stronger and stronger, and Ethernet broadband access has been placed in a more critical position. However, the traditional Category 5 cable can only transmit 100 M Ethernet electrical signals. In many aspects, the transmission distance and coverage can no longer bear the application of the actual network environment. At the same time, optical fiber transceiver has been widely used because of its large information capacity, high confidentiality, small weight, small size, no relay, and long transmission path. Optical fiber transceiver also solves the transmission shortcomings of Ethernet with the help of optical fiber, a high-speed transmission medium. Now some large-scale enterprises directly use optical fiber to establish backbone networks for transmission media when building networks. However, the internal network transmission media is generally copper wire. So how to realize the coordinated connection between LAN and optical fiber backbone networks? This design requires conversion between different interfaces, different linetypes, and different optical fibers and handling the link quality. With the advent of optical fiber transceivers, twisted pair electrical signals and optical signals are perfectly converted to each other, ensuring smooth transmission of data packets between the two networks. At the same time, it extends the transmission distance limit of the network from 100 meters of copper wire to 100 kilometers (single-mode optical fiber).

In fact, the optical transceiver is a kind of Ethernet transmission media conversion unit that can realize the exchange of short distance twisted pair electrical signals and long distance optical signals. At present, it is also called photoelectric converter in many places. It is generally applicable to the access layer of broadband MAN in the actual network environment where optical fiber must be used to extend the transmission distance when Ethernet cable cannot cover; And it also plays a huge role in helping the last kilometer of optical fiber line connect to the MAN and the outer network.

When companies and enterprises are building information networks, they generally pay more attention to the network equipment that routers, switches and even network cards are used for node data exchange, but they often miss media conversion equipment that cannot be replaced by non network cores. Especially for those government organizations and enterprise groups that require a high degree of information technology and a large amount of data flow, the network needs to be directly connected to the backbone network with optical fiber as the transmission medium, and the transmission medium of the enterprise's internal network is usually copper wire, so the media conversion equipment that can ensure the smooth transmission of data packets between different networks becomes a necessity.