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 reported.
■ Higher numbers indicate increasing number of faults.
■ All zeros indicates perfect state of health.
■ Unless the PNCs are locked, the active PNC’s state of health should
always be equal to or better than the standby’s, otherwise, the system
performs a spontaneous interchange.
After a PNC-related alarm is cleared, the system performs a partial refresh of the
standby PNC. The corresponding fault class field is not updated to reflect the
improved state of health until the refresh is done. The state of health indexes do
not agree with the current alarm status during 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 repair the problem.
1. Look for PNC component alarms (major or minor) for the PNC side whose
SOH is not all zero. The standby PNC should be repaired first.
2. Busy-out the standby PNC.
3. Follow the appropriate diagnostic and repair procedures 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 standby PNC
has a complete set of call connections corresponding to those in the active PNC.
If, however, the state of health of the standby PNC degrades, a selective
Table 9-97. PNC State of Health Fault Classes
Fault Class Priority Description MOs
FC_EAL 1 Number of PNs with EALs down 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. (Endpoints can
be determined with
list fiber-link
.)
ATM-EI
