DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1299PNC-DUP (PNC Duplication)
9
7. Disable PNC duplication on the
change system-parameters
customer-options
form by changing ‘‘PNC Duplication’’ to ‘‘no.’’
If an alarm exists against any Expansion Interface circuit pack connected
to a B-PNC carrier, attempt to use
test board UUCSS long clear
to clear
the alarm.
Alterations to PNC which involve only the
addition
of fiber connectivity can be
done with PNC-DUP operational. Alterations requiring the
removal
of fiber
connectivity must be done with PNC-DUP removed. PNC-DUP must be removed
and translations should be saved before any hardware changes are made.
Steady State LEDs
The LEDs of PNC components in a stable duplicated system should appear as
follows:
■ The
active
EIs in the EPNs are functioning as archangels. Their LEDs flash
in a pattern of 2 seconds on 200 milliseconds off.
■ The EPN standby EIs yellow LEDs are off.
■ The PPN active EI yellow LED is on solid.
■ The PPN standby EI yellow LED is off.
■ The SNIs on the active switch node(s) have yellow LEDs on solid.
■ The SNIs on the standby switch node(s) have yellow LEDs off.
■ Active DS1Cs yellow LEDs are on solid.
■ Standby DS1Cs yellow LEDs are off.
■ DS1C facility green LEDs are on if the corresponding facility is equipped.
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 interchange when the health of the
active falls below that of the standby (unless prevented from doing so by a PNC
lock, busyout, or antithrashing mechanism). Potentially service-disrupting faults
which occur in PNC components are reported 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.
