The fiber optic network card recognizes it but is not connected

1. Need to verify that the speed of the fiber optic equipment on both ends is consistent (using fiber optic modules of the same brand and model);

2. Need to verify that the speed of the fiber optic modules at both ends matches the speed of the equipment at both ends (using fiber optic modules of the same brand and model);

3. The wavelength and speed of the fiber optic modules at both ends are the same (using fiber optic modules of the same brand and model);

4. The fiber modules used do not match (usually appearing on the connection link of single-mode single fiber, where the fiber modules at both ends use the same model to prevent connection, with one end having parameters of TX 1550nm RX 1310nm and the other end having parameters of TX 1310nm RX 1550nm);

5. The fiber optic jumper wire sequence needs to be correct (the general connection method for SFP dual fiber is: A sends to B receives, A receives to B sends);

6. Fiber optic modules are compatible with fiber optic equipment (which involves compatibility with various manufacturers. Currently, a better method is to consult and confirm compatibility before purchasing);

7. Conduct cross testing to identify any defects in the optical module or cable (such as moving the normally used fiber optic cable to a suspicious board to confirm).