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| Number | Title | Issue Date |
| 8150028 | Circuit device with serial bus isolation In a particular embodiment, a circuit device includes a first circuit having a first plurality of serial terminals including a first data receive terminal and a first data transmit terminal. The first plurality of serial terminals is communicatively coupled to a par... | 04/03/2012 |
| 8023642 | Method for extending ethernet over twisted pair conductors and to the telephone network and plug-in apparatus for same employing standard mechanics An Ethernet extension device is provided for metro or last mile Ethernet service via twisted pairs as opposed to fiber optics. The Ethernet extension device is implemented as a plug-in extension for existing infrastructure (e.g., in a standard electrical wall box or... | 09/20/2011 |
| 8005205 | Protective plug for distribution frame devices in telecommunications and data technology The invention relates to a protected plug socket (20) for distribution devices in telecommunications and data technology, comprising at least one housing (21) and at least one protective element (12), said protective element (12) comprisi... | 08/23/2011 |
| 7881461 | Method and apparatus for conveying bidirectional data, power and timing signals using a single transformer Transformer driven by data modulated signal provides isolated power. Outbound data is extracted from the data modulated signal received from the transformer. Inbound data received in isolated circuitry modulates the load presented to transformer. Inbound data percei... | 02/01/2011 |
| RE42093 | Active audio compressing in telecommunication An output reducing system for a telephone system, e.g., implemented in a headset, includes an input line and an output line, wherein the input line transmits an incoming signal to an output transducer and the output line transmits an outgoing signal from an input tr... | 02/01/2011 |
| 7822195 | Telephone interface circuit A telephone interface circuit comprises a first transistor for controlling opening and closing between a speech circuit and subscriber lines, a second transistor for controlling the first transistor to turn on and off, a positive feedback circuit connecting a collec... | 10/26/2010 |
| 7773744 | System and method for terminating sealing current A sealing current system for a subscriber line that comprises a power source coupled to a first end of the subscriber line configured to apply a voltage to the subscriber line. The sealing current termination circuit coupled to a second end of the subscriber line co... | 08/10/2010 |
| 7583798 | Apparatus for protecting multi-function products from surge voltage Provided is an apparatus for protecting a multi-function product from surge voltage, the multi-function product including a public telephone network connection unit which receives one of a ring signal, a voice signal, and a fax signal and transmits the signal via fi... | 09/01/2009 |
| 7561683 | Method for measuring resistance for a subscriber line interface circuit using a protective circuit The invention relates to a method for ascertaining a resistance value (Z) between a first contact (2) and a second contact (3) in a subscriber line interface circuit (4), where a protective circuit (9) for protecting the subscriber line i... | 07/14/2009 |
| 7433165 | Auto-resetting span-power protection Systems and methods for auto-resetting span power protection are provided. In one embodiment, a method for deactivating a protective device is provided. The method comprises determining when an overload condition occurs on a communication medium; when the overload c... | 10/07/2008 |
| 7412610 | System and method for power delivery to computing terminals Described is a method wherein a computer terminal is coupled to a power supply through a docking arrangement. The docking arrangement includes a protection circuit. A current supplied to the computing terminal is detected. When the current is greater than a predeter... | 08/12/2008 |
| 7388962 | Directional hearing enhancement systems A hearing enhancement system that enhances a user's hearing based on a directional speaker is disclosed. In one embodiment, the system can include an interface unit that has a directional speaker and a microphone. The microphone captures input audio signals that are... | 06/17/2008 |
| 7372688 | Protection devices and methods for preventing the flow of undesirable differential mode transients A differential mode surge protection apparatus includes first and second solid state protection devices in series between respective input and output connection points. The apparatus may be provided in conjunction with a common mode protection apparatus such as an i... | 05/13/2008 |
| 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 |
| 7363518 | Information handling system with power fault protection circuit An information handling system (IHS) employs a power fault protection circuit to protect the IHS from overvoltages which may occur on an information line from a power adapter to the IHS. The system includes a processor coupled to the protection circuit. The circuit ... | 04/22/2008 |
| 7340051 | Power ramp-up in a line-powered network element system A method of ramping up a power supply that supplies power on a communication medium. The method includes supplying power on the communication medium with the power supply operating at a first set point, determining if an overload condition exists, and, if the overlo... | 03/04/2008 |
| 7330544 | Digital isolation barrier as interface bus for modems The present application provides a variety of exemplary embodiments, such as modem systems, modem devices, modem connectors, host connectors, communication systems and communication cards. For example, there is provided a modem device for use to enable a host to com... | 02/12/2008 |
| 7327995 | Active resistance summer for a transformer hybrid A transmit canceller comprises an operational amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal. A feedback element communicates with the second polarity input terminal and the output terminal. A first input r... | 02/05/2008 |
| RE40020 | Impedance blocking filter circuit An impedance blocking filter circuit is provided for use in telecommunication systems for interconnecting between incoming telephone lines and customer's terminal equipment so as to unconditionally block impedances above 20 KHz due to the customer's terminal equipme... | 01/22/2008 |
| 7301995 | 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... | 11/27/2007 |
| 7289006 | Method and apparatus for implementing common mode cable noise suppression for medium range frequencies A method, apparatus, and a localized in-line cable filter system are provided for implementing electromagnetic cable noise suppression. The localized in-line cable filter system includes at least one electromagnetic interference (EMI) filter element connected betwee... | 10/30/2007 |
| 7289165 | Self-directing bus amplifier and method A self-directing bus amplifier and method is disclosed, which includes an input biased at a given voltage level and a tri-state amplifier with a first input terminal coupled to the biased input and an output coupled to an output bus. A field effect transistor with a... | 10/30/2007 |
| 7287990 | Method and apparatus for grounding a cable A method and apparatus for grounding cables (e.g., fiber cables or copper wire cables) used in networks such as the telecommunications networks are disclosed. For example, the apparatus comprises an enclosure having a plurality of metal posts, e.g., metallic bolts, ... | 10/30/2007 |
| 7283584 | 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... | 10/16/2007 |
| 7280655 | DSL protector having a detachable wire interface An embodiment of the invention is a digital subscriber line (DSL) protection device. The DSL protection device includes a housing and protection components with the housing providing at least one of over-voltage and over-current protection. An in put twisted wire pa... | 10/09/2007 |
| 7277311 | Flash cell fuse circuit Fuse circuits based on a single flash cell or floating-gate memory cell are adapted for use in memory devices, particularly in low-voltage, flash memory applications. The fuse circuits include a floating-gate memory cell for storing a data value and a fuse latch to ... | 10/02/2007 |
| 7270551 | Distributor module for use in telecommunications and data systems technology A distribution connection module (1) for telecommunications and data technology includes a housing (3) in which input and output contacts (4, 5) for the connection of cables or wires are arranged such that they are externally accessible. The hou... | 09/18/2007 |
| 7268993 | Integrated protector and splitter A method and five pin integrated protector and splitter module are provided for use at a protector panel of a facility for housing telephone-related equipment, where the module is capable of being used in conjunction with at least a broadband MODEM separate from a d... | 09/11/2007 |
| 7266195 | Surge clamp protection circuit A surge clamp circuit that may be implemented with DAA circuitry to limit the total voltage developed across one or more line side capacitors due to charge pumping phenomenon during a multi-transient events such as lightning strikes. The surge clamp circuit is capab... | 09/04/2007 |
| 7260163 | Noise blanker using an adaptive all-pole predictor and method therefor A noise blanker (40, 106) monitors and removes noise from a sampled signal by adaptive filtering (98, 150) the sampled signal to generate trained adaptive filter prediction coefficients. The sampled signal is provided as an output signal when the noise... | 08/21/2007 |
| 7231037 | Active audio compressing in telecommunication An output reducing system for a telephone system, e.g., implemented in a headset, includes an input line and an output line, wherein the input line transmits an incoming signal to an output transducer and the output line transmits an outgoing signal from an input tr... | 06/12/2007 |
| 7224492 | Facsimile apparatus capable of detecting a line connection A facsimile apparatus can properly detect whether or not the facsimile apparatus is connected to a line. The facsimile apparatus comprises a network control device formed of a semiconductor DAA device having a primary line control part driven by a local power supply... | 05/29/2007 |
| 7223118 | Electrical terminal for linking two wire pairs The electrical connector assembly includes a first pair of contact members, each comprising a first termination end and a first connection end. A second pair of contact members, each comprising a second termination end and a second connection end, wherein the first ... | 05/29/2007 |
| 7225345 | Employing sense resistor as safety fuse in limited power source applications A communication network utilizing Power Over Ethernet technology including Power Sourcing Equipment (PSE) that includes a multi-purpose device that operates as a current sensing resistor under normal electrical operating conditions and operates as a protection devic... | 05/29/2007 |
| 7218896 | Multiplexed wireless receiver and transmitter A baseband receiver having quadrature analog outputs and a plurality of analog control and status signals and a transmit modulator having analog quadrature inputs and a plurality of analog control and status signals are coupled to a transmit processor having a digit... | 05/15/2007 |
| 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 |
| 7203224 | Isolation system with digital communication across a capacitive barrier 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... | 04/10/2007 |
| 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 |
| 7184544 | Device and method for detecting presence of service on telephone line A device and a method for detecting presence of service on a telephone line prior to and during activation of alternative service on the line. The method comprises performing a first voltage detection on a subscriber line (S20), activating a subscriber line i... | 02/27/2007 |
| 7180719 | Integrated overvoltage and overcurrent device An electrical circuit protection device has an overcurrent protection portion and an overvoltage protection portion. The overcurrent protection portion has a surface. The overvoltage protection portion is disposed on the surface and thermally coupled to the overcurr... | 02/20/2007 |
