Are the optical cables and fiber jumpers of the Optical module broken?

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.

Is there an error in the half/full duplex mode?

Some transceivers have FDX switches on the side: indicating full duplex; HDX switch: represents half duplex.

4. Detection with optical power meter instrument

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