ADTRAN Atlas 550 Front Panel Description, Feature Description Controller Status LEDs

	Chapter 4. Using the Front Panel
	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).

61200305L1-1 ATLAS 550 User Manual 4-3