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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 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 |
| 7352803 | Apparatus and method for communicating voice and data between a customer premises and a central office Systems and methods are provided for communicating data over a subscriber loop using a modem. One such method includes: transmitting data on the loop in a first frequency band; sensing an indication that simultaneous transmission on the loop in a POTS frequency band... | 04/01/2008 |
| 7242764 | Power feeding system for telephone terminal in LAN Terminals are connected via cables in a star-shaped fashion with respect to a HUB in a LAN. Each of the cables includes therein signal lines and power feed lines. The HUB includes therein a power feed section. The power feed section and the power feed lines of each ... | 07/10/2007 |
| 7190785 | Subscriber line interface circuitry 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 ... | 03/13/2007 |
| 7181002 | Method and apparatus for a single power supply for dual power mode A method and apparatus is provided for using a single power supply in a dual mode fashion. A ringing signal is received. A waveform power supply signal based upon the ringing signal. An unbalanced output buffering function upon the signal to be conditioned using an ... | 02/20/2007 |
| 7133441 | High speed access system over copper cable plant A system for transporting a high speed data stream over a plurality of relatively low bandwidth unshielded twisted copper pairs within the local loop plant or in any environment having a plurality of copper lines, such as on campuses, within large buildings, etc. Th... | 11/07/2006 |
| 7130338 | Apparatus and method for communicating voice and data between a customer premises and a central office Systems and methods are provided for communicating data over a subscriber loop using a modem. One such method includes: transmitting data on the loop in a first frequency band; sensing an indication that simultaneous transmission on the loop in a POTS frequency band... | 10/31/2006 |
| 7127078 | Implanted outer ear canal hearing aid A hearing aid system including an implant (60) configured for insertion into a recess (40) formed under the skin of the retro-auricular space (50), which implant does not occlude the ear canal (30). The implant includes electronic circuit... | 10/24/2006 |
| 7127061 | Line driver for digital signal transmission In a line driver an input current (IINN) feeds a node (K1) which is connected to an input on an amplifier (OTA1). A further input on the amplifier (OTA1) has a reference voltage (VSGND) applied to it. The amplifier (OTA1) controls a curre... | 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 |
| 7116761 | Fiber to the curb and fiber to the neighborhood power architecture A system and method of powering a fiber optic communication network are provided which transmits communication data between a telephone company central office and remote user device. The system includes a power source configured to provide an electrical supply volta... | 10/03/2006 |
| 7103178 | Speech amplifier-resident mechanism for controllably supplying power to a line circuit A voltage-coupling and loop current supply mechanism controllably turns on an output transistor within the tip amplifier circuitry portion of the speech amplifier to controllably apply a prescribed voltage to the telephone line during on-hook/standby mode. This cont... | 09/05/2006 |
| 7058174 | System and method for providing lifeline power service to digital subscriber line customers A system and method that provides lifeline service to DSL customers when a loss-of-power message is sent to the central office from an integrated access device on the customer premise. If a predetermined number of loss-of-power messages are received then power is pr... | 06/06/2006 |
| 6922470 | Hybrid DC-feed controller for a subscriber line interface circuit A method and apparatus in a DC-feed controller for controlling a subscriber line interface circuit controlling voltage (alternately, current) on a telephone line comprising a pair of wires. A digital feedback signal is subtracted from a predetermined voltage (altern... | 07/26/2005 |
| 6847718 | Remote power feed method and system A remote power feeding method allowing efficient remote power feeding into a network termination device in the event of a commercial power failure at a subscriber site is disclosed. When the commercial power failure occurs, a power failure signal is transmitted from... | 01/25/2005 |
| 6804347 | Replacing telecommunications carrier equipment Telecommunications carrier equipment in a field cabinet can be replaced so as to allow existing carrier multiplexers to be powered by newer, smaller power supply equipment. Each carrier multiplexer has a plurality of power connections for each of a plurality of powe... | 10/12/2004 |
| 6735301 | Method and device for distributing electric power in telecommunication central office equipment The invention relates to a method for distributing electric power in telecommunication central office equipment intended to operate at voltages within a determined range, according to which method the voltage of the distributed power is allowed to drop temporarily b... | 05/11/2004 |
| 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 circuit, and to charge a storage capacitor that serves as an e... | 02/10/2004 |
| 6681013 | Power feeding system for telephone terminal in LAN Terminals are connected via cables in a star-shaped fashion with respect to a HUB in a LAN. Each of the cables includes therein signal lines and power feed lines. The HUB includes therein a power feed section. The power feed section and the power feed lin... | 01/20/2004 |
| 6665403 | Digital gyrator A digital device for controlling the DC line current on a telephone line which includes a digital device that utilizes a digital filter for setting the DC line current. By controlling the DC line current digitally, software can be used to set the DC line ... | 12/16/2003 |
| 6639984 | Feeder circuit The feeder circuit to which the present invention pertains comprises means for regulating which serves to feed an electric current to a positive output terminal and a negative output terminal; means for feeding electric current which serves to feed an ele... | 10/28/2003 |
| 6584197 | Power-limited remote termination converter with wetting current and emergency power operation for digital data transmission equipment A power management system is interfaced with both a local utility power source and a remotely powered span, and monitors the power availability for and requirements of DDS terminal equipment. Upon detecting that local utility power is insufficient to oper... | 06/24/2003 |
| 6498966 | Method and system for distribution of stand-by electric power A method and system for distribution of stand-by electric power via a network separate from the standard or ordinary electric power network is disclosed. Voltages are transformed/produced in voltage sources, TR and then branched off in control devices, S,... | 12/24/2002 |
| 6411926 | Distributed voice recognition system A distributed voice recognition system includes a digital signal processor (DSP), a nonvolatile storage medium, and a microprocessor. The DSP is configured to extract parameters from digitized input speech samples and provide the extracted parameters to t... | 06/25/2002 |
| 6351534 | Power supply for telecommunications device A power supply has a plurality of single line interface circuits (20, 22, 24 and 26) each connected by a respective line, to a respective telephone (4, 6, 8 and 10) or other telecommunications device. Each SLIC applies a sufficient voltage derived from a ... | 02/26/2002 |
| 6295356 | Power feed for network devices An Ethernet device power transmission system includes an input transformer, an output transformer and a pair of twisted pair conductors. The input transformer includes a pair of primaries for connection to a source of Ethernet data. The input transformer ... | 09/25/2001 |
| 6240325 | Electronic control unit with modifiable pre-set programs for the control of automatic watering systems with plural lines An electronic control unit for the control of automatic watering systems having plural lines comprising an electronic circuit with a programmable processing unit for the control of a plurality of different watering lines. A manually operated selector, pre... | 05/29/2001 |
| 6144737 | Trunk interface circuit having function of battery feed to central office A telephone-system interface circuit connected to a central office via a tip line and a ring line includes a battery having a first terminal and a second terminal. A first current control circuit is connected between the tip line and the first terminal of... | 11/07/2000 |
| 6134323 | Telecommunications system, an automatic branch exchange, a line card, a supply circuit for a telecommunications line, and a telecommunications subscriber device A telecommunication system has a supply circuit to supply power to a telecommunication line. The telecommunication line is connected to a telecommunications subscriber device. The supply circuit has a first electronic impedance that is connected between a... | 10/17/2000 |
| 6115468 | Power feed for Ethernet telephones via Ethernet link An Ethernet device power transmission system includes an input transformer, an output transformer and a pair of twisted pair conductors. The input transformer includes a pair of primaries for connection to a source of Ethernet data. The input transformer ... | 09/05/2000 |
| 5960075 | Switchmode power converters for telephone subscriber line interface circuits A power converter forming part of a telephone subscriber line interface circuit selectively generates a ringing signal waveform, for supply to the line, or a supply voltage for a driver circuit for providing loop current on the line. First and second fixe... | 09/28/1999 |
| 5907614 | High density telephone network interface unit An improved network interface unit having a substantially smaller width than many prior art network interface units. The network interface unit comprises a single, planar circuit board assembly interconnected between incoming and outgoing telephone lines ... | 05/25/1999 |
| 5881148 | T1 channel bank control process and apparatus A technique for powering telephone lines using an unbalanced current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by... | 03/09/1999 |
| 5878133 | Digital direct current feed control for a communication system A communication system includes a SLIC device and a SLAC device. The SLIC device and the SLAC device cooperate to control the power level provided to a subscriber line. The SLAC device includes a digital control circuit which receives a parameter signal i... | 03/02/1999 |
| 5828748 | Method for customizing operation of a line interface circuit in a telecommunications network A method for reducing frequency-related power losses in a telecommunication line interface circuit comprises operating a switching converter circuit at an optimum frequency. Determination of the optimum frequency is based upon a subscriber loop length. Pa... | 10/27/1998 |
| 5764755 | Ring-signal generation in a SLIC A ring generator circuit is included in a subscriber line interface circuit (SLIC) for providing a high voltage ring signal to a plurality of ringers at the same time. The ring generator circuit includes an adder and divider circuit connected to receive a... | 06/09/1998 |
| 5754644 | Method for customizing operation of a battery feed circuit in a telecommunications network A method for controlling power losses associated with the operation of line interface circuits in telecommunications networks comprises detecting a loop current of at least one subscriber loop interconnected to at least one line interface circuit. The det... | 05/19/1998 |
| 5740241 | T1 channel bank control process and apparatus A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by ... | 04/14/1998 |
| 5737411 | Battery switching in a telephone subscriber line interface circuit A telephone subscriber line interface circuit includes a first circuit portion and a second circuit portion, a first battery voltage and a second battery input for receiving a second battery voltage. The second circuit portion is coupled to the second bat... | 04/07/1998 |
| 5734711 | Telecommunication system with energy-saving mode In a program-controlled telecommunication system (KS), at least sub-areas (SLM1..n) are controlled into an energy-saving mode with reduced energy consumption using a central controller (ZS) and additional controllers (SM) given the presence of energy-savi... | 03/31/1998 |
