Appeal No. 96-2023
Application No. 08/139,642
This is a decision on appeal from the final rejection of
claims 8 through 21. Claims 1 through 7 have been cancelled.
The invention pertains to alarm and status-reporting
systems wherein a central monitoring receiver receives alarms
or status reports from a plurality of remote transmitters.
More particularly, when a transmitter calls a receiver and
that receiver picks up, the receiver emits, on a single line,
a sequence of handshake signals of different formats in order
to activate the transmitter. The sequence of handshake
signals continues until the transmitter responds to one of
these signals which corresponds to its own transmission
format. The receiver senses which of its transmitted
handshake signals evoked the transmitter’s response and
receives data from the transmitter in the transmitter’s
format. The data is then decoded and a kiss-off signal is
sent from the receiver to confirm that the data has been
received.
Representative independent claim 8 is reproduced as
follows:
8. A digital alarm receiver connected to a telephone,
comprising:
(a) a single input line;
2
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