一、First, check if the indicator lights of the fiber optic transceiver or optical module and the twisted pair port indicator lights are on？

a、If the optical port (FX) indicator light of the fiber optic transceiver is not on, please confirm whether the fiber optic link is cross-linked? One end of the fiber optic jumper is connected in a parallel manner; The other end is connected in a cross over manner.

b、If the optical port (FX) indicator light of A transceiver is on and the optical port (FX) indicator light of B transceiver is not on, the fault is at the A transceiver end. One possibility is that the optical transmission port of A transceiver (TX) is broken because the optical port (RX) of B transceiver cannot receive optical signals; Another possibility is that there is a problem with the fiber optic link of the A transceiver (TX) optical transmission port (the fiber optic cable or optical jumper may be broken).

c、The twisted pair (TP) indicator light is not on. Please confirm if there is an error in the twisted pair wiring or connection? Please use a continuity tester to test (although some transceivers' twisted pair indicator lights must wait for the fiber optic link to be connected before they light up)。

d、Some fiber optic transceivers have two RJ45 ports: (ToHUB) indicates that the connecting line to the switch is a straight line; (ToNode) indicates that the connecting line to the switch is a crossover line。

e、Some transmitters have an MPR switch on the side: indicating that the connecting line to the switch is a straight through line method; DTE switch: The connecting line to the switch is a cross line method.

二、Have the optical cables and fiber optic jumpers been disconnected?

a、Optical cable on/off detection: Use a laser flashlight, sunlight, or a light emitter to illuminate one end of the optical cable connector or coupling; Is there visible light on the other end? If there is visible light, it indicates that the optical cable is not broken.

b、Detection of fiber optic connection continuity: Use a laser flashlight, sunlight, etc. to illuminate one end of the fiber optic jumper; Is there visible light on the other end? If there is visible light, it indicates that the fiber optic jumper is not broken.

三、Detection with optical power meter instrument

The luminous power of fiber optic transceivers or optical modules under normal conditions: multimode: between -10db and 18db; Single mode 20 kilometers: between -8db and 15db; Single mode 60 kilometers: between -5db and 12db; If the luminous power of the fiber optic transceiver is between -30db and 45db, it can be determined that there is a problem with the transceiver.

The above is the troubleshooting method for fiber optic sensors that we have introduced to you. We hope it can help you solve problems in future use. If you encounter other problems, you can also consult our online customer service to avoid causing losses.