System for internet telephony devices to announce incoming calls
First Claim
1. A circuit for detecting and routing a telephone ringing signal, comprising:
- an input terminal for receiving a telephone ringing signal;
a frequency filter for selecting signals of a specific frequency from said ringing signal; and
a switch, responsive to said selected signals, for routing said telephone ringing signal.
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Accused Products
Abstract
A system detects an incoming telephone call and routes the ring signal to a loudspeaker so that it can be heard at a distance from the telephony device. Once the incoming call has been acknowledged the incoming signal is routed to the headset. New incoming calls are identified by verifying the presence of unique characteristics that are found only in incoming calls. In a conventional telephone the unique characteristic can be a combination of frequencies which are part of the ring signal. The frequencies can be verified by using a bandpass filter which allows only frequencies centered around the ring frequency to pass. Therefore, if a signal of correct frequency is present it will pass through the bandpass filter and activate a switch that routes the signal to the loudspeaker.
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Citations
20 Claims
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1. A circuit for detecting and routing a telephone ringing signal, comprising:
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an input terminal for receiving a telephone ringing signal;
a frequency filter for selecting signals of a specific frequency from said ringing signal; and
a switch, responsive to said selected signals, for routing said telephone ringing signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of detecting and routing an incoming ringing signal for a telephone, comprising the steps of:
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splitting off a portion of the incoming ringing signal;
checking if a desired characteristic is present in the portion of the incoming ringing signal; and
routing the incoming ringing signal based on whether the characteristic is present. - View Dependent Claims (8, 9, 10, 11)
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12. A system for detecting and routing an incoming signal, comprising:
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a frequency filter for selecting signals of a specific frequency from said incoming signal;
a capacitor for removing brief intervals of said selected signals;
a switch responsive to said selected signals for routing said incoming signal; and
a speaker. - View Dependent Claims (13, 14, 15)
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16. A system for detecting and routing an incoming signal, comprising:
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an input/ouput device for receiving and transmtting the incoming signal;
a CPU for processing the incoming signal;
logic for analyzing the processed signal;
an amplifer for amplifying a ringing signal; and
a speaker for outputting said amplified signal. - View Dependent Claims (17, 18, 19, 20)
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Specification