DMS-100 Family Alarm System Description Reference Manual BASE12
5-1
Low Power Alarm system
The Low Power Alarm (LPA) system is a monitor and report system that
provides audible and visual alarm indications for DMS-100 Family office
equipment and any related non-DMS equipment connected to the office.
The LPA system replaces the following Office Alarm System (OAS)
versions:
• Version 1
• Version 2
• Version 2 Enhanced Alarm System (EAS)
The LPA system is backwards compatible with the Version 2 and Version 2
EAS systems only.
Office alarm system
The main purpose of the office alarm system (OAS) is to detect and report
failures and service degradations. The alarm system is a group of hardware
devices and software modules that provide the following:
• visual (lights) and audible (tones) indication of alarm conditions
• transfer of critical, major, and minor alarms to remote sites
• data loops for a portable MAP terminal
• battery power feed for telephone headset communication within the
office
The alarm system uses scan (SC) points and signal distribution (SD) points
to monitor and report the alarm status of each equipment lineup, to a
maximum of 40 lineups. Scan points detect voltage, ground, or closed-loop
conditions. Signal distribution points transfer alarm indications to alarm
panels and/or a T101 link. Hardware switch settings and datafill in data
schema tables ALMSCGRP, ALMSC, ALMSDGRP, and ALMSD define the
SC and SD points.
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