Optical module common faults and solutions
When the port status is UP, but it does not receive or send messages, troubleshoot from the following three aspects: The first step is to check the port message statistics. Check whether the
Only one side of the optical module indicator light is on
Home / Only one side of the optical module indicator light is on
Problem 2: Indicator Light On at One End Only If the indicator light is on at one end but off at the other, swap the fiber jumpers at both ends. If only part of your LED sign lights up — for example, half of one side is on and the rest is off, or your sign is double-sided and only one side (or part of one side) works while the other remains completely dark — this guide will help you identify the cause and restore full operation. Check whether the obtained information is the same as that on the optical module datasheet. The LED will only light up when all connections are properly established and functioning correctly. Based on typical issues encountered with optical modules in daily switch applications, this document summarizes basic troubleshooting steps for resolving common faults: 1.
