Alcatel-Lucent 9500 MXC User Manual page 770

Additional Information
-5V Digital Supply (NPC)
Probable Cause
Recommended Actions
Additional Information
-48 Vdc Supply (NPC)
Probable Cause
Recommended Actions
Vol. VI-B-44
A node will not restart (boot up) without an NCC.
Before replacing an NPC, the NCC must have been installed for not less than 3
minutes to ensure it has a full node status update. Prior replacement of an NPC,
which is driving the TDM bus clock, may result in traffic loss.
-5 volt digital supply out of tolerance. This is a warning alarm.
Equipment malfunction.
1. Providing the NCC is maintaining supply to the node (is not alarmed), replace
the NPC. Traffic will not be affected.
2. If the NCC is faulty or has been removed, first check for other alarms to
determine how critical the alarm is. Depending on the malfunction, the node
may otherwise operate satisfactorily.
• If node operation is not affected (traffic is not affected) ensure the NCC is
installed and indicating no alarms before replacing the NPC.
A node will not restart (boot up) without an NCC.
Before replacing an NPC, the NCC must have been installed for not less than 3
minutes to ensure it has a full node status update. Prior replacement of an NPC,
which is driving the TDM bus clock, may result in traffic loss.
48 volt supply out of tolerance. This is a warning alarm.
48 Vdc power supply to NPC is outside limits of -40.5 to -60 Vdc.
3. Check the NCC -48 Vdc alarm, and the ODU -48 V supply in the CT
Performance screen.
• If all indications match, the power supply for the node is at fault. Confirm
with a voltmeter check.
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