Adaptive multitone signaling method

Details Adaptive multitone signaling method Adaptive multitone signaling method

1992-12-08

1994-10-04

Dwyer, James L.

Telephonic communications

Centralized switching system

With generating of call associated substation signal

379361, 379418, H04M 318

Patent

active

053533429

ABSTRACT:
An inband tone signaling method results in improvements in talk-off and talk-down performance without sacrificing important human factors considerations. The inband tone signal transmitter has a monitor (60) for monitoring the power level in one or more guard bands (1 and 2) of a voiceband signal. A tone generator (64) which is responsive to the monitor (60) generates the inband tone signal consisting of one or more signaling frequencies each at a level such that a desired signal-to-guard ratio is achieved at a detector (50).

REFERENCES:
patent: 4399535 (1983-08-01), Southard
patent: 4962527 (1990-10-01), Burns et al.
patent: 5263084 (1993-11-01), Chaput et al.
L. Gasser, et al., "Speech Immunity of Push-Button Tone Signaling Systems Employing Tone Receivers with Guard Circuits", Electrical Communication, vol. 39, No. 2, pp. 220-243, 1964.

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