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| Number | Title | Issue Date |
| 8094807 | Information processing system, information processing apparatus, methods, program and recording medium A true person can be verified with ease and a high degree of reliability. An ATM communicates with a server installed in a data center to carry out a true-person verification such as an organism authentication on the basis of an operation carried out by a user prior... | 01/10/2012 |
| 8009824 | Line driver with active termination A line driver comprises a driving amplifier receiving an input of the line driver, a current sense resistor connected between the driving amplifier output and the line driver output, and a feedback amplifier sensing the voltage across the current sense resistor and ... | 08/30/2011 |
| 7949125 | Method and apparatus for transmitting signaling tones over a packet switched network As part of a system and method for transmitting a signaling tone over a packet switched data (or other communication) network, an audio encoder may have a speech encoding unit and a tone distorter. The tone distorter may distort one or more components of a signaling... | 05/24/2011 |
| RE42237 | Active mode line voltage regulator for ringing subscriber line interface circuit A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is c... | 03/22/2011 |
| 7912210 | Inductive coupling for communications equipment interface circuitry A system for improving the attenuation of an undesired signal found in a differential signal path through the use of inductive coupling. The system includes a primary inductor, a secondary inductor, and a filter. The primary inductor and the secondary inductor opera... | 03/22/2011 |
| 7881457 | Apparatus and method of single-in-line embedded modem The invention is a compact embedded modem that meets global telephone standards with its interface constructed in a single-in-line form factor. The modem in single-in-line form factor, namely SIP modem, can be integrated into a host system through a single-in-line h... | 02/01/2011 |
| 7839994 | Class A-B line driver for gigabit Ethernet A system and method for transmitting information includes a first driver circuit configured to generate a first component signal of a differential signal at a first polarity. The system includes a second driver circuit configured to generate a second component signa... | 11/23/2010 |
| 7657023 | Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same are disclosed. An example apparatus comprises a splitter to separate a digital subscriber line (DSL) signal from a plain old telephone signal (POTS) signal, and ... | 02/02/2010 |
| 7643629 | Low voltage sensing and control of battery referenced transistors in subscriber loop applications A subscriber line interface circuit apparatus includes tip/ring sense circuitry generating a tip sense signal and a ring sense signal from three sensed currents, wherein the tip sense signal and the ring sense signal correspond to subscriber loop tip and ring curren... | 01/05/2010 |
| 7583797 | Single ended analog front end An analog front end. The analog front end comprises a converter configured to convert a differential input signal to a single-ended input signal, and convert a single-ended output signal to a differential output signal. And a transformer configured to couple the dif... | 09/01/2009 |
| 7548616 | Termination device for a telephone line A termination device for a telephone line of a wire based telephone system, said termination device (30) comprising: a high pass filter (39) for separating signals within a frequency band used by a high-speed modem (13) for data transmission; an... | 06/16/2009 |
| 7539299 | Office-line trunk circuit operating on ground-start and loop-start modes, method of controlling same, and control program for same An office-line trunk circuit is provided to selectively operate on ground-start and loop-start modes. In this circuit, a DC current detection circuit has (i) a first photo coupler detecting a DC loop current caused responsively to supply of the ground to a tip line ... | 05/26/2009 |
| 7536005 | Ring detection and snoop circuit A ring detect circuit is shown that includes a regenerative latch configured to be coupled to a telephone line. The regenerative latch is configured to generate a fast transient signal in response to a ring signal on the telephone line. The latch is coupled to an is... | 05/19/2009 |
| 7489776 | Facsimile apparatus A facsimile apparatus, to which an external telephone enables to be connected through a line, has a line I/F section that transfers and receives signal through a network, a voltage detection section that is provided in a semiconductor DAA and detects a line voltage ... | 02/10/2009 |
| 7486787 | Subscriber line interface circuitry with common base audio isolation stage Methods and apparatus for coupling outgoing analog audio signals to a subscriber line are described. One method includes the step of receiving the outgoing audio signal. The outgoing audio signal is coupled to the subscriber line through a plurality of transistors c... | 02/03/2009 |
| 7483529 | Installation for distributing digital signals The invention concerns a digital signal distributing installation comprising a first coupler to be connected to an ADSL line input and to an electric power distribution line, an ADSL modem with a first and a second port, and a second coupler to be connected to the f... | 01/27/2009 |
| 7466819 | System for powering a switch over data communication cabling infrastructure A system for generating, delivering and distributing electrical power to network elements over a data communication network infrastructure within a building, campus or enterprise. Consolidating power distribution and data communications over a single network simplif... | 12/16/2008 |
| 7457405 | Enhanced low pass filter An ADSL POTS splitter includes low pass filter. The low pass filter includes a first inductor portion in communication with the line interface and a second inductor portion isolated from the line interface via an isolation capacitor. In one embodiment, the first ind... | 11/25/2008 |
| 7450712 | Low voltage sensing and control of battery referenced transistors in subscriber loop applications A method includes the step of providing subscriber loop pull-down circuitry operating in a first voltage domain. The subscriber loop pull-down circuitry decreases at least one of a tip and a ring line current in response to a corresponding pull-down control signal. ... | 11/11/2008 |
| 7447306 | Signaling device and system An electronic signaling device and a loop system incorporating at least one of the devices is described. The device is powered by the loop current and voltage and includes circuitry which enables it to function both in the mode where loop current is interrupted and ... | 11/04/2008 |
| 7443977 | Method and apparatus for a high efficiency line driver A high efficiency line driver is disclosed. The line driver may be applied with equal advantage in wired and wireless communication media to amplify data signals with a minimum of power consumption. In an embodiment of the invention a line driver is disclosed which ... | 10/28/2008 |
| 7412052 | System and method of delivering DSL services A system and method for delivering digital subscriber line (DSL) service to a subscriber from a remote terminal of a telephone network. Included is a first route for delivering a telephone signal to the subscriber, and a second route for passing the telephone signal... | 08/12/2008 |
| 7408993 | Digital communication extender system and method An extender circuit for handling a communication signal transmitted over a transmission line includes a voltage clamp and a current booster circuit. The voltage clamp is connected to a receive end of the transmission line and is operable to clamp a reflection signal... | 08/05/2008 |
| 7400719 | Subscriber line interface circuitry transceiver A subscriber line interface circuit apparatus includes a first driver for driving a downstream data signal in a non-voiceband range and a metering signal onto a subscriber line. The apparatus includes a second driver for driving a downstream voice signal in a voiceb... | 07/15/2008 |
| 7400720 | System and method for optimizing digital subscriber line based services A method is provided that can be used for modifying a control parameter associated with a digital subscriber line (DSL) service. Initially, a real-time performance parameter is received from a first termination unit that is coupled to an DSL circuit. The real-time p... | 07/15/2008 |
| 7386037 | Digital subscriber line communicating system A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through t... | 06/10/2008 |
| 7382797 | Mechanism to select the physical media type connector in network devices A network device comprises first and second transceivers configured to aid communication between a plurality of networked devices; first and second communication medium connections in communication with the first and second transceivers, and capable of receiving fir... | 06/03/2008 |
| 7369655 | Telephone handset universal connector A telephone handset universal connector is used to connect between a phone base having a set of four signal outlets, and a handset having a set of four corresponding signal ports. The telephone handset universal connector includes a universal circuitry and a selecti... | 05/06/2008 |
| 7362799 | Method and apparatus for communication signal resolution Embodiments of the present invention provide methods and apparatuses for determining a parameter value for each of a plurality of communication signals received concurrently as a composite signal. The parameter value of each communication signal is within a correspo... | 04/22/2008 |
| 7362856 | Subscriber line interface circuitry transceiver A subscriber line transceiver apparatus includes an integrated circuit coupling at least one of an upstream and a downstream voice path for carrying voice signals to a subscriber line. The integrated circuit couples at least one of an upstream and a downstream data ... | 04/22/2008 |
| 7362857 | Subscriber line interface circuitry transceiver A subscriber line interface circuit apparatus includes a first driver for driving a downstream data signal in a non-voiceband range onto a subscriber line and a second driver for driving a downstream voice signal in a voiceband range onto the subscriber line. The ap... | 04/22/2008 |
| 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 |
| 7362855 | Subscriber line interface circuitry transceiver A subscriber line interface circuit apparatus includes driver circuitry for combining and driving a downstream voice signal and a downstream data signal onto a subscriber line. Receiver circuitry receives and separates an upstream signal from the subscriber line int... | 04/22/2008 |
| 7356102 | Gain compensation over temperature and frequency variations in wireless transceivers Systems and methods are provided for controlling gain compensation over temperature and frequency variations. A variable amplifier may be used to receive a control signal and an input signal. The variable amplifier may be operable to apply a gain to the input signal... | 04/08/2008 |
| 7355416 | Measurement of cable quality by power over ethernet A method of determining impedance comprising: supplying power to a powered device from a power sourcing equipment at a first current limited level, Ilim1; measuring, at a plurality of times a voltage associated with the output of the power sourcing equipm... | 04/08/2008 |
| 7352857 | Method and apparatus for spectral containment over telephone service lines A method for providing spectral containment over telecommunications service lines is provided. The method includes selecting a filter having spectral characteristics corresponding to a predetermined passband. The method also includes connecting the filter in series ... | 04/01/2008 |
| 7349536 | Techniques for providing uninterrupted digital communications to customers coupled to local loop generation equipment Uninterrupted digital communications are provided between a central office and a customer premises by using a high-pass or bandpass filter to bypass local loop generation equipment. In many present-day telecommunications installations, local loop generation equipmen... | 03/25/2008 |
| 7346158 | Method and system for wiring a digital subscriber line circuit A method and system are provided for wiring a digital subscriber line circuit between a customer premises and a central office. A first connection for a first cable pair is established between the customer premises and a distribution frame in the central office. The... | 03/18/2008 |
| 7342937 | Spectrally flexible band plans with reduced filtering requirements The present invention provides, in one embodiment, a method of simplifying filtering with respect to a band plan. The method includes selecting a reflection point relative to the band plan and designating subchannels as unusable within a filterable separation of the... | 03/11/2008 |
| 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 (VOPS), wherein the VOPS comprises voice over Internet Protocol (IP)... | 03/04/2008 |
