Adaptive multitone signaling method
First Claim
1. An inband tone signaling method for use in a telephone network comprising the steps ofat a transmitter, monitoring the power in one or more guard frequency bands comprising one or more portions of a voiceband signal,generating at said transmitter a tone signal comprising of one or more frequencies with individual power levels selected in response to the power in a selected one or more of said guard frequency bands, andtransmitting the tone signal to a detector.
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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).
26 Citations
10 Claims
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1. An inband tone signaling method for use in a telephone network comprising the steps of
at a transmitter, monitoring the power in one or more guard frequency bands comprising one or more portions of a voiceband signal, generating at said transmitter a tone signal comprising of one or more frequencies with individual power levels selected in response to the power in a selected one or more of said guard frequency bands, and transmitting the tone signal to a detector.
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7. An inband tone signaling method comprising the steps of
receiving a voiceband signal at a central office switch of a telephone network, monitoring the power level in one or more guard bands of said voiceband signal, generating an inband tone signal whose tone power levels are dependent on the power level in a selected one or more of said guard bands, transmitting said inband tone signal from said central office switch to a unit of customer premises equipment, and detecting said inband tone signal at a detector located at said customer premises equipment.
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8. A transmitter for use in a telephone network for generating an inband tone signal comprising
a frequency selective signal power monitor for monitoring the power in one or more guard bands of a voiceband signal, and a tone signal generator for generating said inband tone signal with each individual tone power level determined in response to the power in a corresponding said one or more of said guard bands.
Specification