6500 Raman card NTK552JA, for the performance of ORLIN-OTS and ORLOUT-OTS, what exactly the physical port to check fiber if having low value?
When having alarm of 'Low Optical Return Loss at Output', which fiber to check? on port 7 or port 8? although alarm is against 7, but as ORL alarm normally is reporting on input, then should we check fiber on port 8 instead?
see attached two screenshots.