EXFO AXS-200/850 Ethernet Test Set - Manual (Page 102)

RFC 2544
92 AXS-200/850
Alarms/Errors
The Alarm LEDs are described as follows:
LED Label Color Meaning
Link Down Green Link up.
Red Link down (Current).
Amber Link down was present (History).
Black Not applicable.
LOS (loss of signal) Green No LOS is present during test.
Red LOS alarm is present (Current).
Amber LOS was present (History).
Black Not applicable.
Frequency Green No frequency offset alarm is present
during the test.
Red Frequency offset alarm is present
(Current).
Amber Frequency offset alarm was present
(History).
Black Not applicable.