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 Interfac e circuit pac k connected
to a B-PNC carrier, attempt to use test board UUCSS long clear to c lear
the alarm.
Alterations to PNC which involve only the

addition

of fiber connectivity c an be
done with PNC-DUP operational. Alterations requiring the

removal

of fiber
connectivity must be d one with PNC-DUP removed. PNC-DUP must be removed
and translations should be saved before any hardware chang es are made.
Steady State LEDs
The LEDs of PNC components in a stable duplic ated system should ap pear as
follows:
■The
active
EIs in the EPNs are functioning as archangels. Their LEDs flash
in a pattern of 2 second s 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 correspond ing facility is equip ped.
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
which occur in PNC comp onents are reported to PNC-DUP and incorp orated in
the state of health for the affected PNC. The SOHs of both PNCs are displayed on
the status pnc screen.