No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.

Knowledge Base

When Only the R_LOS Alarm Is Reported, the Services, However, Are Normal

Publication Date:  2012-07-25  |   Views:  132  |   Downloads:  0  |   Author:  SU1001434059  |   Document ID:  EKB0000358098


Issue Description

A R_LOS is found on the LQM. The services, however, are observed as normal. Check the optical power. 

Alarm Information


Handling Process

In the practical applications and tests, when the RLOS alarm occurs, the RLOS alarm must be handled immediately even if the service is not affected in the short term. 

Root Cause

The specification of the client-side SFP module is set according to the international standard and the module performance, with certain redundancy. Therefore, the R_LOS threshold is slightly smaller than the performance threshold. In addition, the module performance varies with the suppliers, and the R_LOS alarm threshold varies with the modules.