Appeal No. 96-0273
Application No. 08/246,387
9. A system for detecting the presence of a Supervisory
Audio Tone (SAT), when superimposed on a voice/data signal, to
yield a combined signal which is periodically sampled,
comprising:
(a) means for deleting the voice/data signal from a
sample of the combined voice/data and SAT signal so that only
the SAT remains;
(b) means for determining the signal power of the
remaining SAT;
(c) means for determining the noise power of the
remaining SAT; and
(d) means for comparing the SAT signal power to the SAT
noise power to determine if the signal power of the SAT
exceeds the noise power of the SAT as occurs when the SAT is
present in the combined signal.
The references relied on by the examiner are:
Wang 5,001,742 Mar.
19, 1991
Taub et al. (Taub), “Principles of Communication Systems,
Chapter 14: Communication System and Noise Calculations,”
pages 610 through 633, 1986.
Claims 1 through 8 stand rejected under the first
paragraph of 35 U.S.C. § 112 as being based upon a non-
enabling disclosure.
Claims 1 through 8 stand rejected under the second
paragraph of 35 U.S.C. § 112 as being indefinite for failing
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