Programming instructions

360
3300 ICP Technician’s Handbook
Table 124: DSU R2 Card Circuit LEDs
LED State Meaning
L0 and L1 right side - solid red error (no physical layer is present or
network/line side (NT/LT) jumper is
not set correctly)
right side - off no error
left side - solid green AB signaling established
left side - flashing
green
Layer 1 established
left side - off no link
right side - yellow with
left side - flashing
green
alarm indication from far end
right side - yellow with
left side - off
blue alarm from card - normal during
link startup
ST (status) flashing operational
off not operational
solid card is booting
MS (message
system)
solid green message link open to the system
off message link not open to the system