Alarm indications signal detection apparatus

Details Alarm indications signal detection apparatus Alarm indications signal detection apparatus

1986-06-20

1988-04-26

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

307234, 370 13, H04J 312

Patent

active

047409649

ABSTRACT:
A circuit using the non-linear charge characteristics of a RC network to, in combination with a consecutive bit logic detector circuit, establish a given integrated output if the consecutive bit check indicates noncorrelation anymore often than once per framing bit. This is accomplished by having the discharge rate for correlation greatly exceed the amount of charge for noncorrelation at the amplitude levels against which the signal is checked relative a reference for determining whether or not in fact an alarm indication signal does exist.

REFERENCES:
patent: 3778727 (1973-12-01), Williams
patent: 4012645 (1977-03-01), Moorey

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