Maintenance-Object Repair Procedures
555-233-143
8-1388 Issue 1 May 2002
Critical-Reliability System (Duplicated Server
and PNC)
!
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 WARNING 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.
STEPS:
Enter status pnc Verify that the component to be replaced is on the standby PNC.
Enter busyout pnc
Enter busyout board
UUCSS
UUCSS represents the cabinet-carrier-slot address of the circuit pack
to be replaced.
Replace the circuit pack
Enter release board
UUCSS
!
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 alarms to clear, or
enter clear firmware
counters a-pnc | b-pnc
Use the letter designation of the pnc which holds the replaced
component (the standby pnc).
Enter status pnc If either PNC’s state of health is not "functional", consult ‘‘PNC-DUP
(PNC Duplication)’’ on page 8-1283.
Enter release pnc
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