Alarm Outputs; Alarm Severity Levels; Output Generation Criteria; Generating Central Office Alarms (Example) - Lucent Technologies PacketStar User Manual

CRITICAL MAJOR
Stratum module fails and a minor alarm
command is sent to the Alarm Module.
Technician locates malfunctioning system
and presses module ACO switch or remote
CO ACO switch to disable.
Technician replaces Stratum module
and resets audible alarm by pressing the
module ACO switch.
Figure 2-2. Generating Central Office Alarms (Example)

Alarm Outputs

Alarm Severity Levels The 4500 Alarm module provides three severity levels of alarms—Critical,
Output Generation
Criteria
®
PSAX 4500 Alarm Module User Guide, Issue 1
PacketStar
255-700-598
MINOR
Bell
1
Alarm module MINOR alarm LED and CO
Minor alarm lamp light, and alarm bell rings
3
4
Major, and Minor—as reported by the following devices:
• LEDs on the module faceplate and chassis front panel
• Relay contact closures that activate external audible and visible alarms in
the CO or NOC
Visible alarms assist in identifying and locating the particular chassis that is in
an alarm condition by activating the equipment bay alarm lights and chassis
alarm indicators. Audible alarms also occur when an alarm condition exists
in the CO or switch room.
Alarms reported at each of the three severity levels—Critical, Major, and
Minor—are interdependent. If a higher severity alarm condition occurs (such
as Critical—during the presence of a lower severity alarm (such as Minor),
the Critical alarms (LEDs, visible, and audible) are activated and the Minor
alarms are temporarily deactivated. Once the condition causing the higher
severity alarm is cleared, the Critical alarms are deactivated, or cleared, and
the Minor alarms are reactivated (if applicable).
The generated alarms described in Table 2-1 occur under the following condi-
tions:
Chapter 2 Module Description
ALARM CONNECTOR
2
when the relay is energized.
PSAX
Relay
Minor
Visible
Functional Description
3 Relays for Audible Alarms
Critical
Major
Minor
3 Relays for Visible Alarms
Critical
Major
Minor
1 Relay for Remote Alarm
Cutoff
NO
Common
NC
Ground
Release 10.0.0
2-3