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7339924 |
Method and apparatus for providing ringing timeout disconnect supervision in remote telephone extensions using voice over packet-data-network systems (VOPS)
A Multiservice Access Concentrator (MAC) provides a time limit for a first ringing voltage signal in response to an attempted call. The call is attempted via a voice over packet-data-network system...
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7324331 |
System and method for providing and receiving electric power through telephone wire-pairs
Converter modules for providing and receiving electric power through a single telephone wire-pair and related systems and methods. In one embodiment, a converter module for providing electric power...
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7260210 |
Unbalanced slic with a built-in ring circuit
A method and apparatus is provided for implementing an unbalanced subscriber line interface circuit with built-in ring circuit. A signal to be conditioned is received. An unbalanced output...
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7257222 |
Ring voltage generation circuit and method for generating a ring voltage
The present invention relates to a ring voltage generation circuit for generating a ring voltage (VTR) between a TIP lead ( 9 ) and a RING lead ( 10 ) with minimized power loss for electronic...
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7251321 |
Crescendo telephone ringer
Crescendo telephone ringers and methods of providing a crescendo telephone ring signal. The crescendo telephone ringer provides a gradual increase in audible ringing volume as a sequence of...
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7239695 |
Method and apparatus for detecting line card threshold
A method and apparatus is provided. The method includes transmitting a signal having an AC component to a subscriber line and receiving at least a portion of the transmitted signal from the...
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7212840 |
Cellular phone and incoming call reception informing method
Incoming call tones and program numbers as numbers used to specify respective incoming call tones are stored in a memory of a cellular phone so as to be set in correspondence to each other. The...
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7197134 |
DTMF generating assistant
A DTMF generating device for automatically generating DTMF tones corresponding to a predefined phone number comprises a processor, a memory, and a speaker enveloped in a credit card sized casing....
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7181005 |
Telephone interface circuit
An interface circuit that interconnects a terminal device at an extension station with the adjunct port circuit of a telephone of a business communications system (BCS), such as a digital PBX. The...
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7181004 |
Direct drive for a subscriber line differential ringing signal having a DC offset
A method of generating a subscriber line differential ringing signal with a DC component includes providing a time-varying supply level, W(t), having a plurality of non-equidistantly spaced...
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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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RE39231 |
Communication terminal equipment and call incoming control method
In a communication terminal equipment and in a method of controlling call incoming, unnecessary noises in a period from the start of an alert sound to carrying out of the next operation can be...
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7068777 |
True DTMF dialer
A circular dial buffer is implemented in appropriate random access memory (RAM) accessible by a DSP for the purpose of storing DTMF digits to be generated and output on, e.g., a telephone line. To...
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7067731 |
Sound source circuit and telephone terminal using same
A sound source circuit is provided for a telephone terminal to reproduce chorus-effect imparted musical tones as incoming call sound or hold sound. Herein, original musical tone data ω c 1 are...
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7046797 |
Telephone system with controllable ringing voltage
A telephone system includes a controllable ringing generator for generating a ringing signal and an interface for providing a ringing voltage derived from that signal on the transmission line. The...
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7043012 |
Method and apparatus for ring again feature for a telephone system
A method and apparatus for an automatic ring again feature on a telephone set for a user that answers a telephone call not intended for that user is disclosed. If a user has answered an incoming...
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7042996 |
Method and apparatus for cas-based ring limiting of FXS ports
A method and apparatus for call-limiting one or more candidate calls received by a router is disclosed. The method and apparatus may be configured to determine whether ringing one or more candidate...
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7031465 |
Network interface device and method
A network interface device includes a first interface operable to receive at least two incoming calls over a subscriber line, and a second interface operable to facilitate communication between the...
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7031464 |
Ring relay control unit for foreign exchange station
The ring relay control unit of an FXS includes a main control unit for controlling relay interrupt command; a relay control device for generating a relay control signal in accordance with a relay...
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7020280 |
Method of processing phone dialing/redialing function and the device thereof
A method of processing a phone dialing process. At first, whether the dial key signal of the dial device is inputted is checked. When the dial key signals of the dial device are inputted and the...
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7016706 |
Mobile radio terminal
An image processing section reads out moving picture data from a memory section in accordance with an instruction from a control section, and subjects the moving picture data to a predetermined...
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7013393 |
Universal intelligent card for secure access to system functions
A method and apparatus for secure access to secured system functions utilizing a universal access card. The card includes a bank of tuned amplifier circuits and tuned audio transducers to maximize...
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6996228 |
Motor for generating vibrational signal
A vibrator mechanism is constructed with a permanently magnetized rotor having an eccentrically positioned center of mass and a flat profile. The magnetized rotor is magnetically coupled to a...
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6961425 |
Socket/plug in DTMF tone dialer
A system for generating number tones for dialing a telephone device. The system comprises a socket assembly, at least one button assembly, and a converter. The socket assembly defines at least one...
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6961424 |
Protected mechanism for DTMF relay
There is provided methods and devices for relaying tone events in a communication system. A first tone data indicative of a first tone is received and buffered. Following, a second tone data...
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6954531 |
Software controlled ring voltage generator
A ring voltage generator uses values stored in random access memory to generate a train of pulses used to drive a voltage waveform to ring a telephone ringer. The values are stored in RAM, and are...
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6944284 |
Pulsed volume control of a magnetic ringer
A digital circuit for driving an audio transducer that provides consistent tonal quality over a range of volume levels, without requiring a variable gain analog amplifier. A fixed amplitude ringer...
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6940974 |
Systems and methods for generating tones for operating telephones
A system for generating number tones for dialing a telephone device comprising a microphone. The system comprises a housing, a first data entry device, first and second memory devices, an output...
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6920220 |
Pre-zero crossing signal generator for sinusoidal voltages with DC offsets such as telephone ring voltages
A circuit for closing a relay when an active AC voltage connected to one of the contacts of the relay is approximately zero volts includes a monitoring circuit that monitors the active AC voltage...
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6882862 |
Method for interfacing a private branch exchange with a wireless communications network and also with the public switched telephone network
The present invention provides a system and method for using a standard private branch exchange (PBX), such as e.g., the Lucent Technologies, Inc. DEFINITY® PBX, for interfacing with a wireless...
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6879687 |
Apparatus for sending a ringing signal and data with reduced impulse noise
An apparatus which produces a ringing signal for a telephone system, effectively suppressing impulse noises. A ringing voltage generator produces a ringing voltage. A ringing signal sending unit...
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6850617 |
Telephone receiver circuit with dynamic sidetone signal generator controlled by voice activity detection
A telephone receiver circuit with sidetone signal generation controlled by voice activity detection in accordance with the present invention uses the voice activity detector (VAD) to detect the...
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6813353 |
Redundant operation of ring voltage generators utilizing voltage bus segmentation for fault isolation
A redundant ringing signal generator subdivides a ringing signal bus into multiple ringing bus segments. A plurality of redundant ringing voltage generators sourcing internally and/or externally...
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6798879 |
Remote telephone call notification system
A remote telephone call notification system for notifying a user at a remote location that a communication device is receiving a call. The remote telephone call notification system includes a base...
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6771641 |
DTMF digit collection and transportation for a packet network
A system and method is provided for collecting and transporting DTMF digits between two network end points in a packet network in order to preserve the integrity of the DTMF digits. The system and...
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6751323 |
Electroacoustic apparatus having ringing signal generation means capable of producing a subjective bass perception
An electroacoustic transducer ( 1 ) includes a ringing signal generation means ( 20 ) for generating a ringing signal (CS) and an electroacoustic transducer ( 9 ) for the acoustic reproduction of...
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6748075 |
Telephone and cordless telephone
A telephone reads out caller information between rings even if a caller is unregistered. The telephone includes a caller information receiver for receiving a call ring and caller information coming...
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6718037 |
Computer with a modem capable of outputting telephone bell signals
A computer having a modem outputs a telephone bell signals regardless of an active state of the computer as well as the modem. The modem provides a voltage signal responsive to the active state...
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6714644 |
Ringing scheduling for FXS ports on platforms with limited power supply
An apparatus and method for supporting enhanced ring scheduling for devices on platforms with limited power supply while seeking to preserve caller ID information and normal ringing cadence is...
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6707895 |
Telephone line management system
A telephone line management system in communication with a telephone line is provided. In one aspect, the system includes a caller ID module operatively coupled to the telephone line for receiving...
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6694010 |
Recognition of a single frequency tone
A fast-converging, computationally simple, method for recognizing a single frequency tone or a sinusoid in a signal without prior knowledge of the tone frequency. The method employs a second order...
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6690792 |
Active decoupling and power management circuit for line-powered ringing generator
A ringing voltage power management circuit is configured to extract an isolated high-value intermediate voltage from a central office powered digital subscriber line through a current limiting...
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6687369 |
Telephone signal discriminator
A telephone signal discriminator to be used with one pair of telephone wires and a telephone company with coded ring services. The invention detects the interruptions of the ring signals, shapes...
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6678374 |
Tone based answer detection for IP based telephones
Activating a switch by a handset where the switch is manually activated when the user wishes to answer an incoming call. While the switch is in the deactivated state, the handset transmits to a...
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6665398 |
Programmable subscriber loop interface circuit and method
A subscriber loop interface circuit and method for externally programming the on-hook, off-hook, and transition states of the subscriber loop interface circuit. The circuit having an off-hook...
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6661891 |
Method and apparatus for detecting an activation tone
A line card for interfacing with a plurality of subscriber lines includes a plurality of data processors and a tone detector. Each of the data processors is associated with one of the subscriber...
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6650751 |
Answer detection for IP based telephones using passive detection
Deactivating a switch in a handset when a user wishes to answer an incoming call or terminate a call. A sound card within a personal computer transmits a hook tone that is above the human hearing...
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6618600 |
Distinctive ringing in a wireless centrex system
The instant invention discloses a method and system for providing a novel wireless centrex service that untethers subscribers from the immobility associated with traditional desktop telephones....
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6611595 |
METHOD FOR GENERATING MEASURING SIGNALS FOR MEASURING TRANSMISSION PROPERTIES OF TRANSMISSION LINKS MUTUALLY INFLUENCING ONE ANOTHER WITH CROSSTALK IN TELECOMMUNICATIONS SYSTEMS, PARTICULARLY OF HANDSFREE EQUIPMENT
In order to be able to measure the transmission properties of transmission links mutually influencing one another with crosstalk in electrical message systems, particularly of handsfree equipment...
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6590973 |
System and method for detecting an off-hook condition
A line card for coupling to customer premises equipment at a termination for detecting hook condition in a telephone system, the line card comprising an interface for transmitting and receiving an...
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