Error description 237-1301A

Error message

1301A UM: FO signal weaker than warng threshld CC%2 %1 (value=-%4dB)

Cause of error

- The signal strength of the FO connection (fiber optic cable to the UM converter) has fallen below a defined warning threshold

Error correction

- Check the optical fiber connections:
- Is the green LED on?
- Is the optical fiber plug fully engaged?
- Is the tip of the optical fiber clean?
- Ensure the proper bend radius
- Exchange the optical fiber