Mitel 3300 Technician's Handbook page 375

DSU PRI and R2 Card LEDs
Three status LEDs and 14 circuit LEDs are mounted on the DSU card
faceplate. Each of the card circuit LEDs shows the status of one circuit.
LED
L0 and L1 right side - solid red
right side - off
left side - solid green
left side - flashing
green
left side - off
right side - yellow
with left side -
flashing green
right side - yellow
with left side - off
ST (status) flashing
off
solid
MS (message solid green
system)
off
Table 103: DSU Card Circuit LEDs
State Meaning
DSU PRI
error
no error
D-channel
established
Layer 1 established
no link
alarm indication from far end
blue alarm from card - normal during
link startup
operational
not operational
card is booting
message link open to the system
message link not open to the system
Status LEDs
DSU R2
error (no physical
layer is present or
network/line side
(NT/LT) jumper is
not set correctly)
AB signaling
established
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