Table 4-3. Atlas 550 Leds - ADTRAN Atlas 550 User Manual

Chapter 4. Using the Front Panel
For these LEDs...
Power
Ethernet
Remote
System
Network Module
Status
4-4
This color light... Indicates that...
Green The unit is on.
Off The unit is off.
Green (solid) Physical link is up.
Green (flashing) Indicates activity on the LAN.
Off Physical link is down - no Ethernet connection.
Yellow Indicates a user is logged in the system via Control/
Craft port or via Ethernet.
Off No one is logged into the 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.
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alarm condition is no longer valid, the OK LED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
ATLAS 550 User Manual

Table 4-3. ATLAS 550 LEDs

LED in the system log.
LARM
61200305L1-1