DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Architecture
1-12Port Network Connectivity (PNC)
1
NOTE:
To determine the actual level and origin of each alarm when there are more
than one against the same MO, you must consult the
Hardware Error Log
Entries
table for that MO.
The alarm log is restricted in size. If the log is full, a new entry overwrites the
oldest resolved alarm. If there are no resolved alarms, the oldest error (which is
not alarmed) is overwritten. If the log consists of only active alarms, the new
alarm is dropped.
INADS Alarm Reporting
All Major and Minor alarms and some downgraded Warning alarms are reported
to INADS. (Some classes of alarms can be downgraded to lower levels by INADS
at the customer’s request). When the system raises one of these alarms, an
attempt is made to call INADS. If the call to INADS fails, the call is retried in 7
minutes. This is repeated until four attempts have been made in a period of
approximately 21 to 30 minutes. If all 4 attempts fail, the system waits 1 hour.
Then it starts over again with 4 call attempts spaced 7 minutes apart. This cycle
repeats until either the call to INADS successfully completes, or until the whole
cycle is repeated 6 times. If, at any time during, a new alarm is raised by the
system that should be reported to INADS, all timers and counts are reset and the
strategy is repeated from the beginning.
During the 4 call attempts, the ACK lamp on the attendant console is turned off.
Approximately 15 minutes into the hour interval between call attempts, the ACK
lamp flashes, indicating the system is having trouble reporting alarms to INADS.
At the end of the entire scenario described above, if the system could not report
the alarm to INADS, the ACK lamp continues to flash.
Port Network Connectivity (PNC)
Port network connectivity is the equipment and controlling software that allows
building large systems comprised of multiple Port Networks (PNs). Each PN is
composed of Time Division Multiplexing (TDM) and packet (PKT) busses, and
the port circuit packs connecting to them. A multi-carrier cabinet can contain
more than one PN.
NOTE:
The terms LAN bus and PKT bus are interchangeable on the Release 7r.
This document uses the term PKT bus, but “LAN” appears marked on some
hardware components.
This section describes the hardware, software and firmware components that
support the PNC. Knowledge of the service and maintenance functions of these
components will aid in diagnosing and resolving troubles. Troubleshooting
