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SX-200 ICP MX Technician’s Handbook
Table 44: NSU L0/L1 Status LEDs
LEDs
Meaning
Left Right
— ON (Red) No Layer 1.
ON (Green) — D-channel established (PRI). OR
Layer 1 established (T1).
Flashing
(Green)
ON
(Yellow)
Alarm indication from far end.
OFF ON
(Yellow)
Blue alarm from card (this is normal during link
startup; PRI NA or response to yellow).
Flashing
(Green)
— Layer 1 established (PRI).
Flashing
(Green)
ON
(Yellow)
Alarm indication from far end.
Flashing (alternating
yellow and green)
Downloading (15-20 minutes).
Flashing (alternating
yellow)
Decompressing and copying files (2-4 minutes).
— OFF No error.
OFF — No Link.
Table 45: NSU FIM Status LEDs
Top LED Status
Meaning for Local, Upper
and Remote, Lower FIM
ON In frame synchronization.
Flashing Out of synchronization. OR
Tx and Rx cables reversed.
OFF Power off. OR
Held in reset.