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| Number | Title | Issue Date |
| 7924990 | Communication apparatus, integrated circuit, and communication method A communication apparatus repeatedly outputs a first multi-carrier signal SS during predetermined periods T1, T2, T3, . . . , and outputs a second multi-carrier signal RS whose phase vector is different from that of the first multi-carrier signa... | 04/12/2011 |
| 7406614 | Electronically implemented dynamic start up method for ports with inrush current limiting functionality A power over Ethernet controller comprising: control circuitry; at least one temperature sensor operatively connected to the control circuitry; and a plurality of electronically controlled switches responsive to the control circuit, each of the electronically contro... | 07/29/2008 |
| 7368798 | Integrated DC/DC converter substrate connections Embodiments of the present invention provide an integrated circuit (IC) having an integrated DC-DC power converter therein. This IC is operable to support the distribution of combined power and data signals in a network environment such as an Ethernet network accord... | 05/06/2008 |
| 7366116 | Network telephone system and methods therefor One embodiment of the present invention includes a telephony interface, a network interface and a local area network (LAN). The telephony interface provides connectivity between one or more netphones and an external telephone network such as a PSTN telephone system.... | 04/29/2008 |
| 7317793 | Method and system for providing DC power on local telephone lines A system for providing DC power on local telephone lines, such as telephone lines in a building or office, for powering devices and circuitry associated with communications over those telephone lines, as well as other functions. Desired voltage and power levels are ... | 01/08/2008 |
| 7293182 | Methods and apparatus for powering a data communications port A data communications device includes a supervisory circuit, a power supply, and a power circuit. The power circuit includes a data communications port, a power supply connection coupled to the power supply, and a power controller coupled to the data communications ... | 11/06/2007 |
| 7236600 | Transmission of power and/or signalling between an audio distribution unit and a plurality of remote audio transducers A remote-controlled audio system comprises sets of loudspeakers (14A-14D) connected to power amplifier units (22A-22D) in an audio distribution unit (10) to which several audio sources, such as a compact disc unit, a tape deck, etc... | 06/26/2007 |
| 7225351 | Method of switching connection of a gateway card from a processor, which has entered a low power mode, to a memory for constant communication A gateway card is connected to an information processor, and receives and transmits data between different networks. The information processor has a normal power mode and a power saving mode. A switching unit connects a memory with the information processor if the i... | 05/29/2007 |
| 7196918 | Capacitive drop power supply with low power consumption An improved capacitive drop power supply is provided for use in home appliances. The power supply circuit includes: a rectifier for converting an AC power source to a DC voltage; a current limiting capacitance interposed between the AC power source and the rectifier... | 03/27/2007 |
| 7181023 | Distributed stereo system This invention concerns a distributed stereo audio system (1). Distributed stereo audio systems are used to provide stereo sound to several rooms or areas from a single source of signal. The system includes two or more speakers (2, 3) for the broadcast... | 02/20/2007 |
| 7113574 | Integrated telephone set with an xDSL-modem Integrated telephone with an xDSL-modem (2), comprising a splitter unit (6) for separating telephone signals received via a telephone line (9) in a low-frequency band from data signals received in a high-frequency band via the telephone line ( | 09/26/2006 |
| 7084608 | PCMCIA card with dedicated on-board battery A PCMCIA card is provided that includes an on-board (integrated) storage battery and, preferably, charging circuitry for same. The on-board storage battery is dedicated to operation of on-board devices that have higher current/power requirements than are available f... | 08/01/2006 |
| 7054779 | System and method for detecting a device requiring power A system and technique for detecting a device that requires power is implemented with a power detection station. The power detection system includes a detector having an output and a return which are coupled together by the device when the device requires power. The... | 05/30/2006 |
| 7054414 | Wireless phone-interface device A phone-interface device receives a wireless signal from a control panel. The wireless signal encodes information regarding a system condition that has occurred in a facility. The phone-interface device communicates the system condition to a monitoring station. The ... | 05/30/2006 |
| 6952785 | Methods and apparatus for powering a data communications port A data communications device includes a supervisory circuit, a power supply, and a power circuit. The power circuit includes a data communications port, a power supply connection coupled to the power supply, and a power controller coupled to the data communications ... | 10/04/2005 |
| 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 |
| 6928159 | Telephone for connection to a public telephone network In the case of the inventive telephone, telephone operating signals (bell signal, charge-unit signals and caller identifiers) and audio signals are processed together by an integrated circuit. This requires signal level matching to be performed for the individual si... | 08/09/2005 |
| 6845156 | System for reducing distortion in a line powered modulator A method and apparatus for a telephone line interface or data access arrangement (DAA) which includes a shunt regulator in series with a line modulator and a sense resistor. A shunt regulator is placed in series between the sense resistor and the line modulator. The... | 01/18/2005 |
| 6795538 | Initialization and monitoring system and method for DLC device A bidirectional telephone communication system for supporting a multiplicity of subscriber lines between a downstream distribution terminal using only two of a multiplicity of pre-existing transmission line pairs connected between an upstream distribution terminal a... | 09/21/2004 |
| 6778665 | Distribution of current draw in a line powered DAA A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered cod... | 08/17/2004 |
| 6735305 | Detection of low tip/ring currents in a line powered DAA A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered cod... | 05/11/2004 |
| 6731728 | Low noise line powered DAA with differential feedback A telephone line interface or data access arrangement (DAA) is provided which draws power for the customer premises equipment from the telephone line. The DAA includes a shunt regulator as the power source drawing power from the telephone line, and a line modulator ... | 05/04/2004 |
| 6728372 | Wire bound telecommunications device and a power supply circuit Known is a wire bound telecommunications device to be coupled to telecommunication lines comprising a transmission circuit coupled between the telecommunications lines, which transmission circuit comprises a power supply circuit for forming a supply voltage from a t... | 04/27/2004 |
| 6687371 | Maintaining an off-hook condition during a call bridge A line powered codec which adaptively allows operation with power supplied from a telephone line in many countries as conditions warrant. A startup procedure uses country-specific register settings, which are powered and maintained from a low voltage side... | 02/03/2004 |
| 6674857 | Startup procedure for international line powered DAA A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line ... | 01/06/2004 |
| 6658098 | Power transfer apparatus for use by network devices including telephone equipment One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler ("the coupler") is coupled to one end of the transmis... | 12/02/2003 |
| 6449348 | Power transfer apparatus for use by network devices including telephone equipment One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler ("the coupler") is coupled to one end of the transmis... | 09/10/2002 |
| 6421430 | Line powered DAA with single ended feedback A telephone line interface or data access arrangement (DAA) includes a shunt regulator in series with a line modulator. A sense resistor is placed in series between the shunt regulator and line modulator to provide a measurement of an amount of noise in t... | 07/16/2002 |
| 6377667 | Telephone line-assist powered apparatus with programmable hold current A power management circuit for use in a terminal interface device such as a modem which converts available power from a terminal or host device such as a computer into usable standby power for use when the terminal interface device is non-operational. The... | 04/23/2002 |
| 6212274 | Line powered modem A battery powered computer system includes an add-on device, such as a modem, with a power supply that uses power from a telephone line to provide power to the modem. In one embodiment the power supply is an adaptive power supply that uses power from both... | 04/03/2001 |
| 6205219 | Call related information reception using sigma/delta modulation A method and apparatus to receive and demodulate call related information, e.g., Caller ID information, in an audio codec placed on the line side and powered by current drawn from the telephone line. The audio codec includes a 1st order Σ/Ɗ A... | 03/20/2001 |
| 6041105 | Adapter circuitry for computers to support computer telephony An external adapter circuitry is plugged into the printer port of a host computer to provide the utility of computer telephony for the host computer. The circuitry is housed in a compact box which is about the size of a common parallel port connector. The... | 03/21/2000 |
| 5958055 | Power management system for a computer An off-hook state of a telephone associated with a computer is used in order to disable the power management unit of the computer to prevent premature power shutdown while the telephone is being used. A power-managed computer system includes a bus system,... | 09/28/1999 |
| 5875235 | Transformerless data access arrangement A transformerless data access arrangement (DAA) device facilitates data transfer between a high speed modem device and a central office telephone line (i.e., a phone line). The DAA device uses D/A and A/D converters in conjunction with a pair of nonlinear... | 02/23/1999 |
| 5809068 | PCMCIA modem A modem having reduced power dissipation and temperature compensation. The modem includes a data pump, a telephone line interface, memory and a controller, connected to the memory and the data pump, for executing program code to control transfers between ... | 09/15/1998 |
| 5631952 | Apparatus and method for modem wake-up with autobaud function An apparatus and method for a data communications device, such as a modem, having a sleep mode for conserving energy and an operational mode for data transmission, to transition from the sleep mode to the operational mode. The wake up method and apparatus... | 05/20/1997 |
| 5555293 | Optically-coupled data access arrangement and transhybrid Isolation and interconnection of a telephone network of tip and ring lines and the analog ports of a modem are achieved with a transhybrid that incorporates optically-coupled isolation stages. Optical isolators connect to the tip and ring lines to provide... | 09/10/1996 |
| 5530879 | Computer system having power management processor for switching power supply from one state to another responsive to a closure of a switch, a detected ring or an expiration of a timer A computer system having a CPU, a power management processor, a switch, a modem, a timer, an override circuit, a glitch circuit, and a power supply in circuit communication. The power supply has several power supply states, which are controlled by the pow... | 06/25/1996 |
| 5446782 | Terminal connecting device having an auto data receiving function A terminal connecting device having an automatic data reception feature provides an interface between a radiotelephone and a data terminal device such as a facsimile machine without the need for modifying the specifications of the radiotelephone. By selec... | 08/29/1995 |
| 5375051 | Apparatus using serial data line to turn on a transceiver or other device An apparatus and a method for using a serial data line to turn on an electrical device are disclosed. Energy is extracted from a data signal on an asynchronous serial data line using a charge pump. The extracted energy is used by a power supply switching ... | 12/20/1994 |
