Überprüfen Sie die Glasfaserverbindungen. The measured power levels are........ DTX-SFM2

If you get the following message;
  
             DTX SFM2 Warning Message

"Check fiber connections. The measured power levels are outside the range expected for setting a reference.", then your Test Reference Cords are either bad/dirty or the ports on the DTX-SFM2 modules are dirty/bad. A simple inspection using the FiberInspector™ Mini will reveal the issue.

This warning will appear when the reference values fall outside of the following ranges:

Smart Remote Mode
 

            DTX-SFM2: -4,5 dBm bis 10,0 dBm