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7388955 |
Combine audio and ringing mode
A circuit where the same amplifiers and the same volume adjustment circuitry are used for the ringer mode as well as for the audio mode of a mobile phone is achieved. The volume adjustment in the...
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7386118 |
Micro modem
A miniaturized modem system including a modem chip on a board and a DAA chip on another board mounted together so that the boards face one another thereby substantially reducing the size of the...
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7340070 |
Voice-data processing circuit and voice-data processing method
When selecting a specific input source that can be processed by only a second voice-data processing unit instead of an input source currently being processed by a first voice-data processing unit,...
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7327840 |
Loudspeaker telephone equalization method and equalizer for loudspeaker telephone
An equalizer for a loudspeaker telephone includes a signal generator for generating a reference signal for broadcast by a loudspeaker of the loudspeaker telephone. A filter alters the frequency...
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7302055 |
Discharging envelope detector
A receiver to detect pulses on a home phone wiring network using envelope detection. The receiver comprises an integrating capacitor charged by a first current source responsive to a differential...
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7302053 |
System and method for providing a communication session
A communications system includes a plurality of service providers, and at least one management unit, wherein the at least one management unit selects at least one service provider of the plurality...
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7272224 |
Echo cancellation
A method, apparatus, system, and signal-bearing medium that in an embodiment determine a degree of correlation between a speaker output signal and a microphone input signal and modulate an adaptive...
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7245710 |
Teleconferencing system
A teleconferencing system comprises a conference bridge having a multichannel connection to each customer equipment. The customer equipment has a unit to separately process each channel to provide...
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7245637 |
Methods and apparatus for suppressing signaling tones in telephony signal
In some embodiments, a method includes detecting a tone in each data frame of a sequence of telephony signal data frames. A first data frame of the sequence of telephony signal data frames may be...
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7239694 |
Integrated circuit configurations and methods for providing functions for public telephones
Circuit configurations designed for use with public telephones to provide standard telephone functions with higher reliability, lower cost, and lower packaging densities, include first and second...
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7227944 |
Echo reduction for a headset or handset
The present invention provides an echo reduction apparatus, system, and method that advantageously reduces echo when communicating over packet-switched networks. An echo reduction apparatus,...
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7218728 |
Telephone terminal device
A power source is turned on by pressing a power source button in a key input part. Then, a telephone number is inputted from the ten keys in the key input part so that the telephone number is...
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7197136 |
Digital portable telephone set
Phase data 129 of received signal is fed through a one symbol delaying unit 141 and a second substracter 1 to a second decoder 2 for decoding to generate quality data 133 c . The quality...
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7197124 |
In-bound call directed telephone station and method of directing a telephone station based on an in-bound call
An in-bound directed telephone station, and a method of directing a telephone station based on an in-bound call, are disclosed. The inbound directed telephone station includes a handset having a...
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7180997 |
Method and system for improving the intelligibility of a moderator during a multiparty communication session
A system and method for improving the intelligibility of a moderator during a multi-party communication session includes receiving a plurality of participant voice streams from a plurality of...
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7177416 |
Channel control and post filter for acoustic echo cancellation
An acoustic echo canceller comprising an adaptive filter, a post filter, and an adjustable filter. The adaptive filter receives a reference signal and a near-end signal, cancels a portion of the...
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7162016 |
Multimedia adapter for headset amplifier
An adapter apparatus for coupling a headset and an audio device to a telephone headset amplifier includes a first interface for sending and receiving audio signals with the telephone headset...
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7155005 |
Apparatus for ring-back constriction
An apparatus for ring-back constriction is provided. The apparatus includes a comparator, a termination controller, a termination variable resistor, a constriction controller, and a constriction...
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RE39406 |
Telephone line coupler
The telephone line coupler circuit has a single transmit opto-coupler whose output includes a DC bias component connected to a gate of a line seize switch for connecting a DC line seize load across...
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7136670 |
Mobile communication device with audio recorder
A mobile communication device that has self-contained audio recorder and playback circuitry therein.
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7130415 |
Line Driver apparatus
A line driver apparatus includes a peak detector operable to receive a data signal and output a first logic signal when the data signal is below a threshold value and output one of a plurality of...
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7130412 |
Telecommunication line driver having synthesized output impedance derived from output current sensing circuit
A synthetic impedance telecommunication line driver has no electrical energy-dissipating elements in series with its output, and synthesizes its output impedance in accordance with current fed back...
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7127060 |
Subscriber circuit
A subscriber circuit, provided with a feeding circuit for feeding the current of a call to a terminal through a subscriber line and a switching circuit group for connecting the feeding circuit to...
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7113588 |
Input-output balanced filter
An input-output balanced filter has a greatly reduced size and excellent stable electric characteristics. The input-output balanced filter includes two LC bandpass filter circuit units. A first LC...
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7106852 |
Telephone accessory for generating conversation utterances to a remote listener in response to a quiet selection
A user conducts a telephone conversation without speaking. It does this by moving the participant in the public situation to a quiet mode of communication (e.g., keyboard, buttons, touchscreen)....
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7099463 |
Method and apparatus for detecting a compatible phantom powered device using common mode signaling
A method and an apparatus provide for determining whether a data terminal equipment (DTE) device represents a compatible device lacking an independent power supply and adapted to be powered using...
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7092512 |
Call control device and call control method
An object of this invention is to provide a method and a device for easily connecting and disconnecting a telephone communication line using an auditory organ instead of using a complex mechanism...
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7085371 |
Push-button signal receiving device and a gain control method
A push-button signal receiving device and a gain control method whereby error in validity determination of a received signal that accompanies the insertion of an AGC circuit can be prevented. An...
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7079645 |
Speaker volume control for voice communication device
A system and method for adjusting the volume level of a communications device in response to ambient noise. In one embodiment, ambient noise is sampled once and the volume of a speaker associated...
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7079644 |
Input-output balanced filter
An input-output balanced filter has a greatly reduced size and excellent stable electric characteristics. The input-output balanced filter includes two LC bandpass filter circuit units. A first LC...
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7065205 |
Line sharing multipoint pots splitter amplifier-based coupler
The eavesdropping prevention system and method of the present invention provides for shunting leakage signals in a communication system. The amplifier-based coupler is constructed with amplifiers...
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7058172 |
Long distance bidirectional driver
A bidirectional long distance driver for Ethernet, named Ethernet Booster, is disclosed that comprises a forward transmission circuit and a backward transmission circuit, wherein each of the...
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7058171 |
IP telephone apparatus and IP telephone system
An IP telephone apparatus for executing a telephone call through a computer network. The IP telephone apparatus includes: a main unit; a telephone line connection unit connected to a telephone...
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7039178 |
System and method for generating a simultaneous mixed audio output through a single output interface
A computer to telephone interface card comprises a plurality of audio data input ports, a mixer, and a converter. The mixer receives audio input data from audio data input ports and, in real-time,...
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7035395 |
Digital communication system
The present invention provides a digital communication system which is free from noise generated in a receiver. A transmitter converts an analog input signal to a digital signal, and then a power...
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7031454 |
Method and apparatus for interfacing telephone apparatus to a digital, analog or hybrid telephone switching system
An adaptive interface method and apparatus for interfacing a telephony appliance such as an analog telephone, modem, fax modem, facsimile machine teleconferencing device, headset, VoIP telephone or...
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7023982 |
Telephone plug system
A telephone plug system includes a jack body having one end adapted to be inserted into standard wall telephone jacks, having at least one receiving socket at another end adapted to receive a...
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7020273 |
Communication terminal provided for a user selected distortion of an acoustic input
The invention relates to a communication terminal provided which selectively distorts an acoustic signal inputted by the user to the communication terminal during a call to another user of a...
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7003092 |
Automated microphone switch controlled by a CTI combo
An apparatus and method are disclosed for connecting a headset microphone alternately to a telephone line and an alternative device. The apparatus includes a device connector for connecting the...
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6980837 |
Automatic mode changing method for car audio system with hands-free therein
The present invention relates to an automatic mode converting method between an audio mode and a hands-free mode for a hands-free built-in car audio system of which a car audio function is...
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6980641 |
Method and apparatus for controlling a computer to implement telephone functions with an enhanced minidialer function
An enhanced telephone emulation computer system including a minidialer program for controlling a computer to add telephony functions which can be invoked from whatever active program is currently...
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6973179 |
Pocket speakerphone
A pocket speakerphone adapter for a landline-based common telephone to provide the common telephone with speakerphone capabilities. The conventional handset of a conventional common telephone is...
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6952672 |
Audio source position detection and audio adjustment
A method for adjusting an operational characteristic of an audio device can include a series of steps. The method can include receiving a user spoken utterance from an audio speech source and...
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6944286 |
Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones
A grounding key detecting device and method for interference-proof detection of the operation of grounding keys in telephones. A circuit that detects the operation of a grounding key includes a...
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6940967 |
Multirate speech codecs
A method of determining a codec mode for encoding a frame in a communications system, the method comprising the steps of: receiving a sequence of signal samples arranged in frames; analysing a...
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6917681 |
Peak power management and active decoupling arrangement for span-powered remote terminal access platforms
A power management circuit for a remote access platform extracts power from a wireline for powering a ring generator that generates a ringing voltage signal that is distributed to a plurality of...
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6895089 |
Pots splitter with line impedance matching
Resistance in parallel with inductors in a series leg of the low-pass filter facilitates changing input and output resistance of the filter with little or no change in the reactance of the...
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6876698 |
Tunable narrow-band filter including sigma-delta modulator
A tunable narrow-band filter that includes a sigma-delta modulator. In one embodiment, a conventional DC canceler is modified to include a re-quantizer in the feedback loop in the form of a ΣΔ...
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6826515 |
Headset noise exposure dosimeter
A method and apparatus for monitoring and controlling exposure to noise related to a headset are described. The method includes sampling an input sound signal to produce samples of the input sound...
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6826265 |
DSL-ready pots device and method
A plain old telephone system (POTS) device, for example but not limited to, a telephone, facsimile machine, analog modem, caller identification (ID) system, speaker phone, cordless phone, etc.,...
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