The optical module is faulty or not securely installed. If the transmit optical power is abnormal, replace the optical module. Related Information Video Identify a Huawei-Certified Optical Module Run the display transceiver [ interface interface-type interface-number | slot slot-id ] [ verbose ]. Today I will discuss Last down cause: Optical module fault alarm. I face a problem, when i connect a new SFP in H805GPFD board then 0-7 port SFP is working but 8-15 port was not. In a Huawei OLT, MA5800 service boards often show offline or abnormal status during faults. Such issues usually result from hardware aging or improper seating. Dust accumulation also creates intermittent faults. It reduces contact efficiency and causes unstable behavior. Regular cleaning improves. Today I will discuss about Huawei OLT Board Status and Description, When New OLT power on, new board add or if reboot OLT then we see many board status in OLT like Failed, Auto_find, Auto_load, Config, or Normal etc state. We can see OLT board status by “ display board 0″ or below command format. GitHub - kaoheng1515/OLT-GPON-XPON-Troubleshooting: This repository contains the most frequently used troubleshooting, diagnostic, and recovery commands for GPON networks (OLT + ONU/ONT). It is designed for field engineers, NOC teams, and ISP technicians working daily with fiber-to-the-home (FTTH).