Mitel 3300 Technician's Handbook page 296

Technician's Handbook
Table 77. DSU R2 Card Circuit LEDs (continued)
Status
L0/L1 LEDs:
(Green)
Flashing
(Green)
Flashing
(Green)
272
LED
Color
Left Right
— ON Error (no physical layer is present
(Red) or network/line side termination
jumper is not set properly).
— OFF No error.
ON — AB signaling established.
— Layer 1 established.
OFF — No link.
ON Alarm indication from far end.
(Yellow)
OFF ON Blue alarm from card (normal
(Yellow) during link startup).
Meaning (All LEDs)