Quotables
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8107615 | Method and device for checking the function for inverting the polarity on a subscriber line comprising a plurality of wires The invention relates to a method and to a device for testing the function for inverting the polarity on a subscriber connection line (TAL) comprising several wires (a, b), in order to connect at least one subscriber to a subscriber connection line (SLM), which comp... | 01/31/2012 |
| 7995744 | Telephone interface circuit A hook switch turns on a transistor by connecting the positive electrode terminal of a capacitor to a base terminal of a transistor in an off-hook state, causing a speech circuit and telephone lines to be connected. The hook switch turns off the transistor by discon... | 08/09/2011 |
| 7864948 | Systems and methods for an electronic hook switch for customer premises equipment Embodiments of the present invention relate to systems and methods for an electronic hook switch for customer premises equipment. In an embodiment, a system includes a first lead configured to be coupled to a tip wire and a second lead and the second lead to a ring ... | 01/04/2011 |
| 7362841 | Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC t... | 04/22/2008 |
| 7262650 | Amplitude adjusting circuit An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third... | 08/28/2007 |
| 7260212 | Method and apparatus for subscriber line control circuit A subscriber line interface circuit apparatus includes a linefeed circuit and a subscriber line control circuit (SLCC). In an embodiment, the linefeed circuit includes a signal conversion circuit which provides a differential mode signal and a common mode signal in ... | 08/21/2007 |
| 7254230 | Subscriber line interface circuitry A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver control signals in response to the sensed signals. A linefeed driver pr... | 08/07/2007 |
| 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 subscriber line. The method includes determining at least a portion of a per... | 07/03/2007 |
| 7215764 | Current sensing echo cancellation device A passive echo cancellation circuit for reducing echoes on a subscriber line includes an output driver adapted to drive a downstream signal on the subscriber line. First sensing circuitry is coupled to the output driver and adapted to sense a current on the subscrib... | 05/08/2007 |
| 7200167 | Direct digital access arrangement circuitry and method for connecting to phone lines An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communi... | 04/03/2007 |
| 7197138 | Programmable device and methods for disabling a ring signal in response to a detected off-hook condition A method and structure for cutting a ring current when a telephone enters an off-hook state. The method includes: (1) activating an off-hook detected signal when the telephone enters an off-hook state, (2) applying the off-hook detected signal to a selected input te... | 03/27/2007 |
| 7162027 | Voice messaging system caller ring bypass control A voice messaging system such as a telephone answering device which allows a calling party to bypass the ring signal and substantially immediately allow the calling party to leave a voice message. To activate the no ring signal access to the telephone answering devi... | 01/09/2007 |
| 7162028 | Universal telephony interface polarity detector A method and apparatus for measuring signals conveyed by a varying the voltage polarity across the tip and ring terminals in a telephone system is disclosed. The invention provides a composite circuit including a first stage in the form of a differential amplifier, ... | 01/09/2007 |
| 7158633 | Method and apparatus for monitoring subscriber loop interface circuitry power dissipation Subscriber line interface circuitry includes an integrated circuit having sense inputs for a sensed tip signal and a sensed ring signal of a subscriber loop. The integrated circuit generates a subscriber loop linefeed driver control signal in response to the sensed ... | 01/02/2007 |
| 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 the ring and tip contacts of the telephone line. The line seize swit... | 11/21/2006 |
| 7139374 | System and method for gathering information related to a geographical location of a callee in a public switched telephone network In a telecommunication system having at least two communicants (i.e., a caller and a callee), a system and method are presented for collecting information associated with the geographical location of either of the communicants. In one embodiment, the approach entail... | 11/21/2006 |
| 7127488 | System and method for gathering information related to a geographical location of a caller in an internet-based communication system In a telecommunication system having at least two communicants (i.e., a caller and a callee), a system and method are presented for collecting information associated with the geographical location of either of the communicants from a server. In one embodiment, the a... | 10/24/2006 |
| 7116778 | Adaptive linefeed control for varying load on a subscriber loop A linefeed on a subscriber loop is generated to generate a current on the subscriber loop. Whether a relationship between a voltage on the subscriber loop and a threshold voltage for an identified range of voltages satisfies a condition is identified. The linefeed o... | 10/03/2006 |
| 7103175 | Systems and methods for an electronic hook switch for customer premises equipment Embodiments of the present invention relate to systems and methods for an electronic hook switch for customer premises equipment. In an embodiment, a system includes a first lead configured to be coupled to a tip wire and a second lead configured to be coupled to a ... | 09/05/2006 |
| 7099462 | Silent ringing with reduced device sizes A system and a method selectively switch between two different voltage supplies supplying a common node. A first of the voltage supplies is coupled to the common node by a first switch and a second of the voltage supplies is coupled to the common node by a second sw... | 08/29/2006 |
| 7095824 | Instructive out-of-service telephone lines A method (10, 20) and apparatus (30) enables a customer (47) to distinguish between a dead or broken Internet Protocol telephone line and an out-of-service Internet Protocol telephone line. The method detects (11) a hook status of a devic... | 08/22/2006 |
| 7092700 | Method and a device for signaling a call or a message to its addressee In a method of signaling an incoming call or electronic message from a given sender to the user of a receiver terminal to whom the call or message is addressed, the receiver terminal identifies the sender, allows for at least one changeable or predetermined paramete... | 08/15/2006 |
| 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 component. A distance between a speaker and the auditory organ of a te... | 08/15/2006 |
| 7085358 | Visual caller identification A visual caller identification system and method are provided. A caller identification device of a called party's telephone, whether integrated with the telephone or stand-alone, includes a series of colored lights for visually alerting the called party to an incomi... | 08/01/2006 |
| 7085373 | Circuit and method for detecting AC voltage pulses A detection circuit and method for detecting AC voltage pulses at a defined frequency relate to first transforming an input signal to a low-frequency signal by multiplying the input signal by a mixing frequency. This down-mixed signal can then be filtered and evalua... | 08/01/2006 |
| 7076554 | Internet service telephone communication connection method First and second telephone sets each comprise telephone set control units, voice codecs, and accumulating units. When the first telephone set, which is a subscriber of an internet service provider network, sends out internet service connection point data to the seco... | 07/11/2006 |
| 7050509 | Digital isolation system with hybrid circuit in ADC calibration loop An improved digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. ... | 05/23/2006 |
| 7046793 | Digital access arrangement circuitry and method having current ramping control of the hookswitch A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines. Briefly described, a means for providing a proper hookswitch transition ... | 05/16/2006 |
| 7003089 | Splitter for analog telephone signal and digital data In a telephone system where frequency multiplexed analog telephone signals and digital data signals are transmitted over a line, incoming calls are announced to the customer installation by a ringing indication signal having an amplitude between 1 and 30 V RMS, whic... | 02/21/2006 |
| 6999581 | Event detection circuit A network interface circuit that screens out transient signals and provides an indication to the line side that an actual event has occurred, so that appropriate discrimination circuitry is powered up to determine the exact nature of the actual event only when actua... | 02/14/2006 |
| 6980643 | Fallback function telecommunications device The invention herein is fallback function communications device comprised of a microprocessor, utilized to perform a predetermined operation and processing of a predetermined input signal and then output a corresponding signal, as well as a minimum of one relay circ... | 12/27/2005 |
| 6978008 | Zero crossing detection circuit A PNPN structure thyristor and a third P-type impurity region are formed on a semiconductor substrate, and a fixed current circuit using an NPN transistor 20 and a resistor 30 is connected to a cathode terminal K and a gate terminal G of a composite el... | 12/20/2005 |
| 6975723 | Architecture for minimum loop current during ringing and caller ID A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst circuitry may be powered from the user powered circuitry by the transmissi... | 12/13/2005 |
| 6973181 | Method of generating a ring signal in a subscriber line interface circuit technical field In a method and a device for controlling the magnitude of the generated ring signal in a the Subscriber Line Interface Circuit (SLIC) the voltage of the A and B lines to the subscriber from the SLIC is compared to a reference voltage. The device is arranged to contr... | 12/06/2005 |
| 6970546 | Intelligent remote caller ID An intelligent remote caller identification system is provided that typically includes a central office, a service control point, and an internet call routing system. The central office typically triggers a query responsive to receiving a call request. The service c... | 11/29/2005 |
| 6956943 | Method and apparatus for minimizing the telephony ring voltage power supply requirements of an integrated services hub The present invention discloses a method and apparatus for reducing the power required by an integrated services hub supporting a plurality of telephone circuits, comprising offsetting ringing of each of the plurality of telephone circuits such that all the telephon... | 10/18/2005 |
| 6940970 | Ring boost circuit to extend ringing range of telephone SLICs A ring boost circuit has a first switching device coupled to a ring node. The first switching device is responsive to a ring operation. A charge pump is connected to the ring node, and the charge pump provides a voltage offset to enhance a differential voltage betwe... | 09/06/2005 |
| 6937713 | IP call forward profile A method and system for providing call forwarding in an IP telephone network is disclosed. First, when a telephone number for a first telephone from a second telephone is dialed, the call is routing to a call manager. Call setup procedures with a BRG responsible for... | 08/30/2005 |
| 6934384 | Subscriber line interface circuitry A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver control signals in response to the sensed signals. The signal processor... | 08/23/2005 |
| 6930751 | Method and apparatus for reducing false hook detection A method and apparatus is provided reducing false switch hook detection in a line card coupled to a subscriber loop. The method comprises operating in a first state of the line card, receiving a control signal, and disabling switch hook detection in the line card. T... | 08/16/2005 |
