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DS1C-BD
Issue 1 June 2005 1085
Replacing a DS1 Converter Circuit Pack with
the Same Type DS1 Converter Circuit Pack—Duplicated
PNC
!
WARNING:
WARNING: On a system with duplicated PNC, synchronization may be provided over a
combination of active and standby components. This condition is indicated by an
OFF-BOARD WRN alarm against TDM-CLK with Error Type #2305. Repairs to
standby PNC in this state may disrupt service. Otherwise, if the active PNC is
functional, replacement of a standby component will not disrupt service.
!
WARNING:
WARNING: Do not power down a Switch Node carrier to replace a circuit pack.
Steps Comments
Enter status pnc. Verify that the component to be replaced is on the
standby PNC.
Enter busyout pnc.
Enter busyout board location. location represents the cabinet-carrier-slot address
of the circuit pack to be replaced.
Replace the circuit pack with the same
DS1 converter board type.
Enter release board location.CAUTION: Do not busyout any Expansion
Interface circuit pack after this point.
Enter test alarms long clear for
category exp-intf.
Wait 5 minutes for SNI-BD, SNI-PEER,
FIBER-LK, and DS1C-BD alarms to
clear, or enter clear
firmware-counters <a-pnc or
b-pnc>.
Use the letter designation of the pnc that holds the
replaced component (the standby pnc).
Enter status pnc. If either PNC’s state of health is not “functional”,
consult the PNC-DUP section of the Maintenance
Manual.
Enter release pnc.