ADTRAN 1202076L2 - Manual (Page 43)

Chapter 3. Operation
61202076L1-1 TSU 600 User Manual 3-3
Module Status LEDs
The module status LEDs display the operational condition of ports in-
stalled in the option slots.
Name Description
OK (green) Indicates the operation is in the normal mode
and no errors have been detected.
Test (yellow) Indicates that one of the interfaces is operat-
ing in a test mode. This includes a self-test or
a test loopback. When lighted, this LED also
indicates that normal data flow is not occur-
ring in at least one of the module ports.
Alarm (red) Indicates an alarm condition has been
detected. When the alarm condition is no
longer valid, the
OK LED activates (turns on).
To view an alarm condition, select the active
alarm menu item or select
Alarm by pressing
shift 8 . If the alarm conditions have been cor-
rected, the alarm which caused the activation
of the
Alarm LED can be viewed under the
Unit History menu.
System (green) Indicates the status of the power supplies.
If the LED is illuminated green , all installed
power supplies are functioning properly.
If the LED is illuminated red , one or both
power supplies are not functioning normally.
This feature is for the AC-powered 600e only.
For the TSU 600 and DC- powered 600e, the
system LED is always green.