Gigabit single-mode fiber module failure

The reason for the failure of the Gigabit single-mode fiber module, we have sorted out the following steps for your reference.

Gigabit single-mode fiber optic module

1. Check whether the fiber jumper matches the optical module

The multimode fiber optic jumper is usually orange, and this kind of fiber jumper is printed with the words 62.5/125u or 50/125u. Single-mode fiber optic jumpers are usually available in yellow and blue, etc., and the ones printed on the Internet are G652D or 9/125u. The optical fiber module is multi-mode (850nm wavelength), and other colors are generally single-mode optical modules.

2. Self-circulation inspection

The light emitted by the general-purpose gigabit single-mode fiber module is visible light, which can be observed by the naked eye (do not look directly at the light outlet). The light output port on the left side of the optical module is a red laser, if there is light, it means that it is working normally. The light emitted by the single-mode optical module is invisible light. We can connect the sending port and receiving port of the optical module with a jumper wire. If the working status light of the switch is on, it means that it is working normally.

3. Port configuration

If communication still fails, we need to perform the following configurations, taking H3C 5024P as an example. Now some of the switch ports we commonly use are photoelectric multiplexed, and most of the optical ports are still closed, and these ports need to be opened manually. For communication between switches of different brands, we also need to force the port speed and working mode to be 1000Mpbs, full-duplex mode.

4. Confirm compatibility

Fiber optic modules usually need to write manufacturer information, which is what we often call compatibility. If you still cannot communicate normally, please contact customer service to see if your optical module is compatible with your device.