ADTRAN ATLAS 800 Series Module QUAD E1, User Manual, Page: 45 / 190

Chapter 4. Using the Front Panel
61200180L1-1 ATLAS 800 User Manual 4-3
Table 4-2. LED Descriptions
For these LEDs... This color light... Indicates that...
System Green (solid) No diagnosed system faults were found.
Green (fast blink) Flash download is in progress.
Yellow Fault was diagnosed, but the condition no longer
exists. The condition will be recorded in the system
log.
Red (solid) An error condition is present with either the power
supply or temperature.
Red (fast blink) A fatal error occurred during flash download.
Off Power is not currently applied to the system.
CSU Status OK (green) Both network interfaces are operating normally with
error-free operation. If either interface experiences
alarms, the OK LED remains off.
Test (yellow) One of the interfaces is operating in a test mode. This
includes a self-test, a test pattern, or a test loopback.
When illuminated, this LED also indicates that normal
data flow is not occurring in at least one of the module
ports.
Error (flashing red) The Error LED indicates an error such as BPV
(bipolar violation), OOF (out of frame), or CRC (cyclic
redundancy check).
Alarm (red) An alarm condition has been detected. When the
alarm condition is no longer valid, the OK LED
illuminates. To view an alarm condition, select the
active alarm menu item or select Alarm by pressing
Shift + 8. If the alarm conditions have been corrected,
you can view the alarm which caused the activation of
the Alarm LED under the View History menu.
Module Status Green (solid) The module is OK.
Green (blinking) The module has been disabled by the user.
Red (solid) At least one port on the module has an alarm.
Red (blinking) The module is enabled, but is not responding to the
system controller.
Off No module occupies the slot.
Module Online
The module is available for use or is currently in use. If
the module is manually taken offline, this LED is
turned off.
Module Test Yellow One or more ports in a module is in test.