When You’re monitoring a DWDM network and see a ‘Low Input Power on Channel 3’ alarm. What’s your first troubleshooting step?”
Let’s break it down:
- Increase amplifier gain: While this might seem like a quick fix, it’s essential to first understand the root cause of the power loss. Increasing the amplifier gain could mask the real problem and create additional noise in the system.
- Check for fiber damage: This is often the best first step. Physical damage or increased attenuation in the fiber can cause low input power. Inspecting the fiber and connections helps rule out one of the most common causes.
- Adjust wavelength: Wavelength drift can cause signal degradation, but it’s usually a secondary step after verifying other causes like fiber or transmitter issues.
- Reset transponder: Resetting equipment can help resolve many issues, but it should generally be a last resort after eliminating other possible causes. You wouldn’t want to disrupt the network without clear reason.
The best first step is typically to check for fiber damage. Fiber issues are common and can lead to low signal input, especially over long distances. However, there are no wrong answers, each of these actions could be part of your troubleshooting process depending on the scenario.
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