Maintenance and Troubleshooting
Green LED
The green LED is usually off. It may be on during power up or when an Internal Loopback or CSU
Loopback Test is running.
Sample LED Display (Slot 4)
If a call is in progress on a module that is in a working or normal state, the System Status display
for that module appears as: Roff Yon Goff .
If a slot is empty, R, Y, and G appear without indicating a status. Slot 4 is empty, according to the
sample screen in the last procedure.
Slot Status
Slot Status provides the following information for a module in a particular slot:
LED status
I
Errors (yes or no)
I
Mode (initialization, standby, test, or normal)
I
Alarms (yes or no)
I
Maintenance busy (yes or no)
I
Procedure
→
Menu
Maintenance
Slot Status
4-34
→
→
Dial the slot no. (00-17)
Slot
4
4
4
4
→
→
Enter
Status