ADTRAN ESU 120e user manual LED D escriptions, CSU Status, SU/ D rop Status

Chapter 3. O peration

LED D escriptions

CSU Status

The CSU status LEDs display the operational condition of the network interface located on the controller board in the unit.

Name	Description
OK (green)	Indicates the operation is in the normal mode and no
	errors have been detected.
Test (yellow)	Indicates that the network interface is operating in a test
	mode. This includes a self-test or a test loopback.
	When lighted, this LED also indicates that normal data
	flow is not occurring on the network interface.
Error (red)	Indicates an error such as a BPV, OOF, or CRC.
Alarm (red)	Indicates an alarm condition has been detected. When
	the alarm condition is no longer valid, the OK LED
	activates (turns on). 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, the
	alarm which caused the activation of the Alarm LED
	can be viewed under the Unit History menu.
D SU/ D rop Status
Name	Description
OK (green)	Indicates the operation is in the normal mode and no
	errors have been detected.
Test (yellow)	Indicates that the interface is operating in a test mode.
	This includes a self-test or a test loopback. When
	lighted, this LED also indicates that normal data flow is
	not occurring in at least one of the module ports.
Alarm (red)	Indicates an alarm condition has been detected. When
	the alarm condition is no longer valid, the OK LED
	activates (turns on). 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, the
	alarm which caused the activation of the Alarm LED
	can be viewed under the Unit History menu.

61200420L1-1 ESU 120e User Manual 3-3