Processing facility alert and alarm indications for multiplexed

Details Processing facility alert and alarm indications for multiplexed Processing facility alert and alarm indications for multiplexed

1996-08-29

1998-04-28

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340507, 340517, 340521, 340527, 340525, 34030915, G08B 2900

Patent

active

057450323

ABSTRACT:
In large multi-tiered hierarchical alarm systems for high capacity telecommunications transmission systems, it is important to notify the maintenance craft of only the highest alarm, and to notify only when the alarm has been validated by persisting for a sufficiently long time. Advantageously, this is accomplished by timing alarms and freezing the timing when a higher level alarm is detected. If the higher level alarm is no longer present, timing on the lower level frozen alarm signal continues until there is a timeout. A timed out alarm is reported to the maintenance craft.

REFERENCES:
patent: 4117479 (1978-09-01), Galvin et al.
patent: 4423410 (1983-12-01), Galvin et al.
patent: 4611197 (1986-09-01), Sansky
patent: 4749985 (1988-06-01), Corsberg

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