9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-B-5
Recommended Actions
1. Check for other alarms to determine how critical the alarm is. Depending on
the malfunction, the Node/Terminal may otherwise operate satisfactorily.
2. If there are no other alarms to indicate a general NCC/IDU failure, check
configuration of the clock in the CT Date/Time screen. Also check if events
in the CT Events Browser screen are still being date/time stamped. If normal,
an RTC specific communications problem is indicated.
• Depending on the location of the problem, it may clear when the Node/
Terminal is rebooted.
• If the problem remains, replace the NCC/IDU.
Additional Information
The RTC holds the date/time reference.
Clock Generator Failure (NCC/IDU)
Cannot communicate with the clock generator. This is a warning alarm.
Probable Cause
Equipment malfunction.
Recommended Actions
Reboot (power-off, pause, power on). If the alarm remains, replace the NCC/
IDU.
Additional Information
This alarm is only checked at power-on, reconfiguration, or software reload. Loss
of communications to the clock generator means its configuration cannot be
loaded. The Node/Terminal will not operate.
The clock generator sets primary timing for the NCC/IDU, including TDM clock
and FPGA functions.
For a Node, an associated NCC TDM Clock Failure alarm will only appear if an
NPC is installed. When the NCC clock fails, the NPC will assume clocking for
the TDM bus, and the NPC will activate the NCC TDM Clock Failure alarm.
+5V Digital Supply (NCC/IDU)
+5 volt digital supply out of tolerance. This is a warning alarm.
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