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245
Basic Troubleshooting and Repair
ASU LEDs
Table 46: NSU CIM Status LEDs
Top LED Status Meaning (All LEDs)
ON Communication link synchronized with controller.
Flashing BSP running.
When top and bottom LEDs are alternating, NSU is
powering up. Do NOT interrupt.
OFF No power.
LED
LED
Status
Meaning (All LEDs)
CIM ON Communication link established and configured.
Flashing Link established but not configured.
OFF No power.
ONS Circuits ON Circuit is in use.
Flashing
(slow)
Circuit is not available (undergoing maintenance).
Flashing
(fast)
A fault has occurred with the circuit.
OFF Circuit is idle.