The optical fiber cable we usually contact is dual -core fiber. One line is used to receive signals and the other line is used to send signals. The single -core optical fiber is contacted less, and a optical fiber cable is used to receive and send signals at the same time. According to the principle of light of different wavelengths, the light signals of at least two different wavelengths of different wavelengths are transmitted in single -mode fiber to achieve the effect of receiving and sending simultaneously.

　　So when your fiber line is only one? How do you choose a fiber transceiver?

　　Therefore, it is also necessary to buy separately on the optical fiber transceiver. Ordinary fiber transceivers can be used alone or in pairs. However, the single -core optical fiber transceiver must be used in pairs. Generally speaking, this end is R5T3, and the end is R3T5. (This end receives 1550nm and sends 1310nm. Receive 1310nm to the end and send 1550nm).

　　Therefore, after selecting a single fiber fiber transceiver, you need to pay attention to pairing during use. It is the 1310NM transmission end and the 1310 receiver. Generally, manufacturers will be divided into AB in the model. Then when used, the A -end transceiver can be connected to the B -end hair income device, and it cannot be used by AA and BB.