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.
no related alarm infomation on LMT
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.
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.