Lucent Technologies Release 7 Resolving poor state of health, Refresh and unrefresh of the standby PNC

DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4 June 1999
Maintenance Object Repair Procedures
9-228ATM PNC-DUP (ATM PNC Duplication)
9
■A zero entry indicates that there are no faults rep orted.
■Higher numbers indic ate increasing number of fa ults.
■All zeros indicates per fect state of health.
■Unless the PNCs are locked, the active PNC’s state of health shoul d
always be equal to or better than th e standby’s, otherwise, the system
performs a spontaneous interc hange.
After a PNC-related alarm is cleared, the system performs a partial refresh of the
standby PNC. The corresponding fault class field is not up dated to reflect the
improved state of health until the refresh is d one. The state of health indexes do
not agree with the current alarm status d uring this period.
Resolving poor state of health
When the SOHs for both PNCs are not all zeros (perfect health), use the following
steps to identify and rep air the problem.
1. Look for PNC component alarms (major or minor) for the PNC sid e whose
SOH is not all zero. The standby PNC should be repaired first.
2. Busy-out the standby PNC.
3. Follow the appropriate diag nostic and repair p rocedures for the alarmed
PNC components just as with a simplex PNC. Both the alarm and error
logs should be examined to isolate the fault.
4. Verify that the related PNC SOH is restored to all zeros.
5. Release the standby PNC.
Refresh and unrefresh of the standby PNC
In a fully-functional PNC with healthy standby and active sides, the standb y PNC
has a complete set of call c onnections correspond ing to those in the active PNC.
If, however, the state of health of the standby PNC d egrades, a selective
Table 9-97. PNC State of Health Fault Classes
Fault Class Priority Description MOs
FC_EAL 1 Numb er of PN s with EALs d own EXP-PN
FC_PACL 2 Number of PNs with LINL, RINL, or EI-SNI
neighbor link faults EXP-PN
FC_HW 3 Number of PNs affected by hardware faults in a
link having an EI as an endpoint. (End points can
be determined with list fiber-link.)
ATM-EI