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.


eSpace U1930 CVP board LOS light always show yellow

Publication Date:  2013-03-06 Views:  150 Downloads:  0

Issue Description

Customer found that the LOS light on U1930 CVP board always show yellow but the E1 connection is OK, the call over E1 is OK.

Alarm Information

no related alarm infomation on LMT

Handling Process

1、check the U1930 grounded ok
2、check pralink state, it's ok

3、check the clock sources, it was configured

4、check LMT Alarm infomation, there is no related info.
5、we found there is only one E1, and our R&D told me that when there is only one E1/T1 , U1930 will think another E1/T1 connection is not oK, so the LOS light will always show yellow.

Root Cause

when the LOS indicator is on , that means there is signal loss


this may not reasonable, we will discuss with R&D and see if they can modified this feature,  even there is only one E1/T1, the LOS indicator should be off unless this E1/T1 loss signal.