Avaya 03-300430 User Manual

When both PNCs do not have an all-zero SOH (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 without an all-zero SOH.  

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’s SOH is restored to all zeros.

5. Release 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 
standby PNC’s state of health degrades, a selective unrefresh of those connections that utilize 
the faulted component(s) is performed.  If the standby PNC’s health improves, a selective 
refresh of connections on the affected route is performed so that call setup is consistent 
between the active PNC and the healthy parts of the standby PNC.
The Standby Refreshed? field on the status pnc screen does not refer to the selective type 

of refresh.  It refers only to a global refresh that is performed when:

●

The system is initialized and PNC duplication is enabled.

●

There has been a spontaneous PNC interchange.

●

The standby PNC has been released from busy-out.

●

A system reset of level 2 or higher has taken place.

The Refreshed field may display yes when in fact the standby is partially unrefreshed.  An 

interchange into an incompletely refreshed standby results in dropped calls.  This can happen 
when a more severe fault occurs on the active PNC or when reset pnc interchange is 

used with the override option.