Light	Status	Description & Suggested Action (Likely Failures in Bold)
MAJOR OR MINOR	Unlit	No alarms present.
MAJOR OR MINOR	Red/Yellow	Red = Major alarm Yellow = Minor alarm
LOCAL	Unlit	Remote mode (DIP switches disabled).
LOCAL	Green	Local mode (DIP switches enabled).
ACO	Unlit	Normal mode. No alarms are being suppressed.
ACO	Yellow	Alarm cutoff active. One or more active alarms suppressed.
T1-1 OR T1-2	Unlit	Offline
	Green	Normal
	Red	Loss of Signal (LOS) detected.
	Yellow	Bipolar Violation (BPV) detected.
	Green (Flashing)	Loopback active.
	Red (Flashing)	Loss of Frame (LOF) or Alarm Indication Signal (AIS) detected.
	Yellow (Flashing)	Yellow alarm (Remote Alarm Indication) detected.

Light	Status	Description & Suggested Action (Likely Failures in Bold)
CRD	Unlit	Loss of power.
	Green	No current alarms
	Red	Alarm state active. // (See alarm log for cause)
	Red (Flashing)	Self-test or Boot in-process.
	Yellow (Flashing)	Card is saving data to flash RAM, do not power down.
LNK	Unlit	No Ethernet link.
LNK	Green	Good Ethernet link.
10/100	Unlit	10 Mb Ethernet.
10/100	Green	100 Mb Ethernet.
TX/RX	Unlit	No Ethernet transmit activity.
	Green	Current Ethernet TX/RX activity.
	Yellow	Current Ethernet TX/RX collision.