Recently, many customers and friends have come to inquire about the meaning of each indicator light of PDH/SDH mux. In fact, when many faults occur, we can analyze the fault problem through the status of each indicator light of the fiber mux, so as to help solve the problem. Next, we will introduce the specific meaning of the PDH/SDH mux indicators in detail. Interested friends can take a look together!
The meaning of each indicator light of PDH/SDH mux
The meaning of each indicator light of PDH/SDH mux:
Power indicator (POWER): When the system power switch is turned on, this green light is on.
Local Alarm Indication (LOA): This red light is on when any kind of alarm occurs on the local end.
Peer Alarm Indication (RMA): This yellow light is on when the peer has any kind of alarm.
No light alarm indication (NOP): This red light is on when there is no light signal input on the photodetector.
Out-of-sync warning indication (LOF): This red light is on when frame out-of-sync occurs.
Error code alarm indication (1E-3): This red light is on when the system has 10-3 error codes.
Bit error alarm indication (1E-6): This yellow light is on when the system has 10-6 bit errors.
1-4 branch E1 signal disappearance alarm indication (E1 SIGNAL LOSS1-4): When any E1 signal of 14 branches disappears, the corresponding red light is on.
Alarm tone shield button (ALM/MUT): After this self-locking button is pressed, the alarm tone will not be issued when there is an alarm indication. When the button is released, an alarm light will indicate an alarm and an alarm sound will be emitted.
Local alarm indication switch button (LOCAL/RMT): When the self-locking button is not pressed, the alarm indicator indicates the local alarm state. After this button is pressed, the alarm indicator indicates the alarm state of the peer. Power indication, local alarm indication and alarm sound are not affected by this button.
E1 Signal Loss Alarm Masking Button (RLS/MASK): When this self-locking button is pressed, the existing branch disappearance alarm state will be shielded, and the working branch without signal disappearance alarm will not be affected, and then the working branch will not be affected. The alarm indication will still be issued when the signal disappears again. After this button is released, the alarm status of all E1 branches will not be shielded.