DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-227ATM PNC-DUP (ATM PNC Duplication)
9
PNC state of health
PNC-DUP software monitors the health of the two PNCs as determined by their
state of health (SOH) vectors, and initiates an intercha nge when the health of the
active falls below that of the stand by (unless prevented from d oing so by a PNC
lock, busyout, or antithrashing mechanism). Potentially service-d isrupting faults
that occur in PNC components are rep orted to PNC-DUP and incorporated in the
state of health for the affected PNC. The SOHs of both PNCs are displayed on the
status pnc screen, as shown in Figure 9-11.
Figure 9-11. Status PNC screen with standby PNC fully In-Service
PNC state of health indexes
The Inter-PN Index form the state of health vector is used to trac k and compare
the states of health of both PNCs. The fields making up the ind exes are two-digit
numbers separated b y periods (.), with eac h field representing a d ifferent class
of faults. The fault class fields are arranged in order of decreasing importance
from left to right. In other words, each fie ld in the index supersed es the following
fields in determining whic h PNC is healthiest. A fault class drives an interchang e
only when all of the higher priority fault c lasses are equal. A zero entry indic ates
no faults present for that class. Inc reasing numbers indic ate increasingly higher
numbers of faults present in that class.
The Inter-PN Index contains five fields (XX.XX.XX). The Inter-PN Index reports
faults in connectivity be tween port networks.
■The meaning of each fault class field is given in Table 9-97.
status pnc page 1 of 1
PORT NETWORK CONNECTIVITY
Duplicated? yes
Software Locked? no
Standby Busied? no
Direct Connect? no
Standby Refreshed? yes
Interchange Disabled? no
A-PNC B-PNC
Mode: active Mode: standby
State of Health: functional State of Health: functional
Inter PN Index: 00.00.00 Inter PN Index: 00.00.00
Major Alarms: 0 Major Alarms: 0
Minor Alarms: 0 Minor Alarms: 0
Warning Alarms: 0 Warning Alarms: 0