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Match Document Document Title
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...
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...
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...
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...
7127061 Line driver for digital signal transmission  
In a line driver an input current (IINN) feeds a node (K 1 ) which is connected to an input on an amplifier (OTA 1 ). A further input on the amplifier (OTA 1 ) has a reference voltage (VSGND)...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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;...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
5721774 Longitudinally balanced, dual voltage line-feed circuit  
A power-conserving, loop start signalling, dual-voltage line-feed circuit that maintains ac longitudinal balance on the loop conductors and which limits average and peak loop current not only when...
5682423 Electrical power and telephone ringer signal distribution system  
A telephony system includes a plurality of local network terminations connected to a street cabinet in turn connected to an exchange. The street cabinet has a power supply for supplying voltage, a...
5659610 Battery feed circuit  
Resistive circuits are provided at the tip and ring of the battery feed circuit as a method of alleviating the need for bulky DC transformers or complex integrated circuitry. The voltage is...
5623531 Auxiliary power for telephone distribution system  
A telephone and auxiliary power distribution system includes an optical fiber in joint combination with one or more copper conductors to provide electric power for powering the various electronic...
5596637 Power dissipation manager circuit for an interface device feeding a subscriber telephone line  
A circuit for limiting power dissipation through telephone subscriber line power supply interface devices, by using a pair of final stages to which an external component effective to dissipate...
5555301 Power supply apparatus and method for energizing telephone alerting mechanisms and circuitry  
In a digital data communications device for use in an ISDN environment, a power supply apparatus and method are provided for energizing telephone danger circuitry or other alerting mechanisms....
5553138 Telephone line sourced power supply  
In a telecommunication unit attached to a telephone line, power is provided by taking power from the telephone line when the unit is off-hook. When the unit remains on-hook, power is maintained to...
5509069 Splitting of a supply current drawn from a telecommunication system's line among a plurality of user's circuits  
A circuit is provided in telecommunication terminal equipment for splitting a limited supply of current received from a subscriber's line current among a plurality of functional circuits according...
5457741 Subscriber transmission system  
The arrangement is such that to a transmission apparatus of the subscriber side in a subscriber transmission system wherein the transmission apparatus of the subscriber side which serves a...
5416832 Call detection control apparatus  
A call detection control apparatus includes individual call detecting circuits, a common call detecting circuit, switching circuits, and a power supply circuit. The individual call detecting...
5359655 Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances  
A supply circuit for a two-wire telecommunication line includes a voltage adjusting circuit section coupled between one of the wires and a first reference potential point and further includes a...
5347577 Battery feed circuit for supplying feed current to telephone set  
A battery feed circuit supplies a feed current to a telephone set via a 2-wire telecommunication line formed of a TIP line and a RING line. The battery feed circuit includes a first voltage...
5337355 Supply circuit device for a user's telephone circuit, having a low voltage loss  
A circuit is described which comprises an operational amplifier, two resistors connected between the telephone line and the inputs of the amplifier, a capacitor which is charged via a first bipolar...
5323461 Telephone line interface circuit with voltage switching  
A two-wire telephone line interface circuit comprises a driver circuit for supplying direct current on the line, a controlled voltage generator, a sensing circuit for monitoring the line current, a...
5315653 Current limited subscriber interface circuit  
An electronic interface circuit between a telephone subscriber line and a telephone main exchange is disclosed which forms, with the main exchange battery, a supply bridge for the telephone line,...
5289359 DC-DC power converter including sensing means for providing an output when the reserve power of the converter falls below a predetermined amount for a given input voltage  
A DC to DC power converter in the form of a pulse-width modulator is shown which can sense via an indication of duty cycle how much reserve power is available for loads using the present input...
5131033 Sealing current generator for a telephone circuit  
A sealing current generator for a telephone circuit provides a conventional nominal DC bias current in a telephone loop, and also temporarily provides a higher "zap" current whenever the DC current...
Matches 1 - 50 out of 132 1 2 3 >