ADTRAN Atlas 550 - Manual (Page 53)

Chapter 4. Using the Front Panel
61200305L1-1 ATLAS 550 User Manual 4-3
Table 4-2. ATLAS 550 Front Panel Description
Feature Description
Controller Status LEDs Displays the general status of the entire ATLAS 550. (See also Table 4-3
on page 4-4.)
Power Indicates the unit is on or off.
System Indicates the status of the system.
Ethernet Indicates the status of the ethernet port.
Remote Indicates whether a user is logged into the unit.
Network Module LEDs Displays the status of the network interface. (See also Table 4-3.) All
LEDs are off if no network module is installed.
OK Indicates that the network interface is operating correctly.
Test Indicates that the network interface is in a test mode.
Error Blinks to indicate the occurrence of error events.
Alarm Indicates an alarm condition on the network interface.
Option Module LEDs Displays by row the operational condition of each module installed in the
option slots. (See also Table 4-3 on page 4-4.) All LEDs will be off if no
option module is installed.
Status Indicates the operational condition of modules installed in the option
slots.
Online Indicates whether the module is available for use or is currently in use. If
the module is manually taken offline, this LED is turned off.
Test Indicates that one or more ports within a module are in test.
ACO Switch Clears the Alarm Relay connection located on the rear panel of the
ATLAS 550.
CRAFT Port Allows the ATLAS 550 to connect to a computer or modem using the
CRAFT port (an EIA-232 port).