One tricolor per port:
■Off—Not enabled
■Green—Online with no alarms or failures
■Amber—Online with alarms for remote failures
■Red—Active with a local alarm; router has detected a failure
LEDs
■Alarm indication signal (AIS)
■Frame error
■Line code violation
■Local and remote loopback
■Loss of signal (LOS)
■Out of frame (OOF)
■Yellow alarm
Alarms, errors, and
events
16 ■ATM2 E3 IQ PIC
M20 Internet Router PIC Guide