ADTRAN Atlas 550 - Manual (Page 54)

Chapter 4. Using the Front Panel
4-4 ATLAS 550 User Manual 61200305L1-1
Table 4-3. ATLAS 550 LEDs
For these LEDs... This color light... Indicates that...
Power Green The unit is on.
Off The unit is off.
Ethernet Green (solid) Physical link is up.
Green (flashing) Indicates activity on the LAN.
Off Physical link is down - no Ethernet connection.
Remote Yellow Indicates a user is logged in the system via Control/
Craft port or via Ethernet.
Off No one is logged into the system.
System Green (solid) No diagnosed system faults were found.
Green (fast blink) Flash download is in progress.
Yellow (solid) A fault was diagnosed, but the condition no longer
exists. The condition will be recorded in the system
log.
Red (solid) An error condition with either the power supply or the
temperature is present.
Red (fast blink) A fatal error occurred during flash download.
Off Power is not currently supplied to the system.
Network Module
Status OK (green) The network interface is operating normally with error-
free operation. If the interface experiences alarms, the
OK LED remains off.
Test (yellow) The interface 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 the module ports.
Error (flashing red) 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alarm condition is no longer valid, the OK LED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. If the alarm conditions have
been corrected, you can view the alarm which caused
the activation of the A
LARM LED in the system log.