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2017

19596362Automated determination of power transmission resistance
29560218Reverse-powered transmission device

2016

39515507Energy-saving circuit for a network-powered device, network arrangement and energy-saving method
49448576Programmable power supplies for cellular base stations and related methods of reducing power loss in cellular systems
59432081Method and apparatus for providing electrical power to a broadband digital subscriber line access
69380152Systems and methods for providing back power to a service unit
79368976Adaptive inductive power supply with communication
89362753Extended signaling system and method
99325859Method for optimising electrical consumption of a residential gateway
109319537Load balancing reverse power supply

2015

119203379Electronic inductance circuit for the power supply of a 2-wire bus intercom system and a device thereof
128934946Mobile power supply device with expanding function

2014

138861554Systems and methods for powering a service unit
148693679Communications system and associated method for reducing power consumption of a telecommunications device

2007

157256684Method and apparatus for remote powering of device connected to network
167190785Subscriber line interface circuitry
177184543Method and circuit arrangement for controlling a subscriber line interface circuit
187181002Method and apparatus for a single power supply for dual power mode
197180999Subscriber line interface circuitry
207167557Subscriber line interface circuit (SLIC) including a transient output current limit circuit and related method
217164763Power offloading for a subscriber line interface circuit
227162650Network switching apparatus for supplying power to network communication equipment through twisted pair line

2006

237155008Power offloading for a subscriber line interface circuit
247130415Line Driver apparatus
257130414Active mode line voltage regulator for ringing subscriber line interface circuit
267130412Telecommunication line driver having synthesized output impedance derived from output current sensing circuit
277127061Line driver for digital signal transmission
287116778Adaptive linefeed control for varying load on a subscriber loop
297103178Speech amplifier-resident mechanism for controllably supplying power to a line circuit
307099462Silent ringing with reduced device sizes
317054439Differential input stage for electronic equipment, comprising means for reducing interference caused by a voltage or current in common mode
327031463Resistive feed rail generation in a power supply
336985578Low voltage broadband line driver

2005

346963762Mobile phone using tactile icons
356963761System and method for sounding a music accompanied by light or vibration
366961593Telescopic telephone
376960713Portable telephone
386959083Loop current monitor circuitry and method for a communication system
396956945Method and apparatus for phantom battery feed
406956160Tone generator apparatus sharing parameters among channels
416954657Wireless communication device having intelligent alerting system
426954531Software controlled ring voltage generator
436947728Mobile phone with music reproduction function, music data reproduction method by mobile phone with music reproduction function, and the program thereof
446947554Least mean power consumption in telecommunications systems
456944482Visualization supplemented wireless mobile telephony
466944286Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones
476944285Communication terminal device, holds melody sensing method, incoming melody playing and information storing medium
486940970Ring boost circuit to extend ringing range of telephone SLICs
496937724Apparatus and method for delivery of ringing and voice calls through a workstation
506934384Subscriber line interface circuitry
516930671Method for dynamically lightening backlights of mobile communications terminal
526928306Portable mobile unit
536927336Interworking interface module for telecommunication switching systems
546920209Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
556917681Peak power management and active decoupling arrangement for span-powered remote terminal access platforms
566916212Comb and a method for making a branch connection to preexisting cabling
576914980Power switch device utilizing phone loop signals to control supply of electrical power to a telephony instrument
586909781DSL line tester
596904013Error handling within power amplifier modules in wireless base-station
606901139Calling party ringtone selection in telephone system
616897787Method and apparatus for composing an illumination pattern
626888938Dynamically adjustable digital gyrator having extendable feedback for stable DC load line
636885745Voltage and protection arrangement for a telephone subscriber line interface circuit
646882866Portable information apparatus and information notification method for the same
656882713Telephone apparatus
666881099Jack assembly
676879848Method and apparatus for alerting an operator of an incoming cellular or portable phone call
686879687Apparatus for sending a ringing signal and data with reduced impulse noise
696876847Control of synchronous display of melody information and different information on mobile communication terminal
706873702Telephone subscriber system
716865271Constant current line circuit with class features
726850782Wireless device with vibrational communication capabilities
736847718Remote power feed method and system
746847705Apparatus for receiving voice signal and data and controlling method thereof
756840815Front access DSX assembly

2004

766830465Interconnect chassis and module
776829354Biasing arrangement for optimizing DC feed characteristics for subscriber line interface circuit
786829292Increasing gain with isolating upstream and downstream filters and amplifiers
796823182Cellular mobile telephone apparatus
806823066Digital access arrangement circuitry and method having current ramping control of the hookswitch
816809641Method for disabling alarm temporarily in mobile communication terminal
826807433Mobile communication terminal with unanswered incoming-call notifying function
836807411Telecommunication equipment with at least one storage location reserved for operator-managed data and corresponding method
846804347Replacing telecommunications carrier equipment
856799998Jack assembly
866799034Response message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method
876798879Remote telephone call notification system
886792294Incoming notification pattern setting circuit and method of portable telephone
896791276Gradually lighting/dimming wireless transmission indicator lamp
906785563Mobile terminal operating in telephonic and tactile modes
916778655Call waiting caller identifier
926775531Subscriber terminal temperature regulation
936775361Recording/playback apparatus with telephone and its control method, video camera with telephone and its control method, image communication apparatus, and storage medium
946766004Method and apparatus for coordinating ringing and audio announcements in a phone system
956764332Battery-driven equipment having a low-profile vibrator
966763246Portable cordless telephone having an improved ringing device
976763107Method and apparatus for reducing distortion in a line powered modulator circuit
986763105Telephone with call-incoming-operation limiting function and method of limiting call-incoming operation of telephone
996760583Portable mobile unit for conducting communication using one of character and picture information when a predetermined condition occurs
1006760434Dual impedance hybrid
1016760433Central office interface techniques for digital subscriber lines
1026760430System and method for reducing power dissipation in line driver circuits
1036757534Cellular phone with special standby feature
1046754363Structure of dual magnetic loop type receiver
1056754341External resistor and method to minimize power dissipation in DC holding circuitry for a communication system
1066751485Sounding alert for recent calls
1076744889Subscriber circuit for public telephone set
1086741702Device for connecting a subscriber line to a high frequency link and to a low frequency link
1096735305Detection of low tip/ring currents in a line powered DAA
1106735302DSP based SLIC architecture with current-sensing voltage synthesis impedance matching and DC feed control
1116731738Call tones in communication networks
1126731728Low noise line powered DAA with differential feedback
1136728371Method and apparatus for stabilization of a line powered modulator circuit
1146728362Continuity testing with call tone messaging in communication networks
1156728354Methods and devices for outputting audio announcements using CID related and other reference parameters
1166720864Wireless on-call communication system for management of on-call messaging and method therefor
1176718186Melody playing system
1186714123Electronic device incorporating vibration generator
1196711258Apparatus and method for controlling a volume in a digital telephone
1206711239System and method for identifying a callee of an incoming telephone call
1216707908Telephone terminal device
1226704582Personalized incoming call signal for communication devices
1236700975Subscriber line interface circuit
1246700974Switching power supply for generating a ringing voltage
1256697647Cellular mobile telephone apparatus and an alarm device therefor
1266697646Transceiver that prohibit the vibration motor
1276697470Incoming call indicator
1286694143System for using a local wireless network to control a device within range of the network
1296694014Constant impedance digital line interface circuit
1306687515Wireless video telephone with ambient light sensor
1316687371Maintaining an off-hook condition during a call bridge
1326681006Service activation upon automatic callback and automatic recall expiration
1336678377Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission
1346675026Method for editing terminating ring tone in a mobile wireless terminal
1356674857Startup procedure for international line powered DAA

2003

1366671373Method and apparatus for DC feed control
1376671370Method and apparatus enabling a calling telephone handset to choose a ringing indication(s) to be played and/or shown at a receiving telephone handset
1386668060Tracking switchmode power converter for telephony interface circuit
1396665548Wireless communication device having display panel
1406665534Priority incoming call alerting system for a wireless communication system
1416665404Method and device for power supply in telecommunication systems
1426665403Digital gyrator
1436661894Circuit configuration and chip set for supplying a telephone subscriber loop with a supply voltage and network-side terminal of a telephone subscriber loop
1446661892Method and apparatus for decreasing distortion in a line powered modulator circuit
1456658270Displayer-embedded cellular phone battery
1466658109Method and apparatus for supplying power to a twisted pair wire on a telecommunications modem transmission link
1476658105Method to reduce distortion of a digital data signal by a pots ringing signal, and related telephone ringing signal generator
1486653930Urgency-based variable call notification
1496650746Urgency of call indication to called party through distinctive notification
1506650231Personal electronic device notification system
1516647117Continuity of voice carried over DSL during power failure
1526640318Continuity testing in communication networks
1536639984Feeder circuit
1546639983Adaptable line driver interface for digital telephone systems
1556636603System and method for determining the transmit power of a communication device operating on digital subscriber lines
1566636602Method for communicating
1576628971Method for displaying background image in mobile telephone
1586628194Filtered in-box for voice mail, e-mail, pages, web-based information, and faxes
1596624746Musical event information pager and paging system
1606621904Pre-charging line modem capacitors to reduce DC setup time
1616621903Portable telephone set and method for inputting said incoming call reporting melody
1626618482System and method for protecting devices connected to a telephone line
1636618470PORTABLE COMMUNICATION TERMINAL PROVIDING EXCITATIVE INDICATION SERVICE FOR INCOMING CALL REACHING IN ABSENCE OF USER'S ATTENTION, METHOD FOR PRODUCING EXCITATIVE INDICATION AND COMPUTER PROGRAM FOR THE METHOD
1646611592Incoming-call tone generation device
1656611583Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
1666608996Cover for an electronic device
1676608900Load management system for an electrical device
1686606508Method for handling phone numbers in mobile station and mobile station
1696603985Ringing tone control method and device for mobile communication apparatus
1706590977Analog subscriber circuit
1716587682Signal routing for reduced power consumption in a conferencing system
1726587560Low voltage circuits powered by the phone line
1736587035Portable radio information terminal, message- notification method, recording medium and microcomputer
1746584306Two-way radio with silent annunciation
1756577730Modular digital telephone system and method including an universal telephony shelf
1766577729Alarm display and method
1776577722Call waiting response status
1786575792Jack assembly
1796573825Communication apparatus and alerting method
1806570983Method and system for audibly announcing an indication of an identity of a sender of a communication
1816570982Digital clocking synchronizing mechanism
1826570981Device and method for expanding legacy switches
1836567522Voltage alternating switch circuit
1846567521Subscriber loop interface circuitry having bifurcated common mode control
1856567518Method of field programmable gate array configuration
1866567517Timing and switching array and method
1876566957Methods and systems for a MOSFET-bipolar complimentary symmetry driver with local feedback for bias stabilization
1886563922Arbitration mechanism
1896563619Infrared data communication apparatus and method
1906560467Mobile phone provided with a device for notifying the user of the reception of a call signal and method therefor
1916560466Auditory feedback control through user detection
1926560323Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
1936556665Portable telephone set
1946553118Method and apparatus for calculating DC offset in a digital gyrator
1956549790Portable telecommunication apparatus for multiple audio accessories
1966542605Method and arrangement for choosing supply voltage
1976539218Message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method
1986532477Method and apparatus for generating an audio signature for a data item
1996525256Method of compressing a midi file
2006522745Digital access arrangement circuitry and method having a synthesized ringer impedance for connecting to phone lines
2016519326Telephone voice-ringing using a transmitted voice announcement
2026516024Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with low distortion and current limiting
2036510204Method and apparatus for providing an all digital loop with power-optimised mode
2046507654Line interface battery feed arrangements with PTC resistors
2056504864Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit

2002

2066501967Defining of a telephone's ringing tone
2076501019Isolation apparatus for electronic equipment
2086498966Method and system for distribution of stand-by electric power
2096498849Arrangement in a subscriber line interface circuit
2106498825Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting
2116496358Breaker apparatus and breaker unit
2126489748Split backplane power system
2136486608Electroluminescent device for communication apparatus of mobile phone for informing an incoming call
2146480603Device which reduces central office battery current during modem connections
2156480602Ring-detect interface circuitry and method for a communication system
2166472591Portable communication terminal apparatus with music composition capability
2176470196Portable communication apparatus
2186469460Portable wireless terminal having separated vibration embodying circuit for alerting a user of an incoming call
2196463297Device and method for automatically disconnecting a call in a mobile radio communication terminal
2206456712Separation of ring detection functions across isolation barrier for minimum power
2216449359Telephone identification calling apparatus and procedures
2226449136Active current limiter
2236442271Digital isolation system with low power mode
2246442213Digital isolation system with hybrid circuit in ADC calibration loop
2256442017Battery-power distribution panel for network equipment
2266438392Absence reception information device and absence reception information method for folding portable cellular phone
2276434236PC server telecommunications power system
2286434225Communication support system in which a ringing sound control processing is performed in response to a call from a telephone network
2296427011Modem data access arrangement without diode bridge
2306424251Personal electronic device notification system
2316418330Device and method for generating various ring tones in radio terminal
2326418323Wireless mobile phone with Morse code and related capabilities
2336418309Apparatus and method for configuring settings of a portable intelligent communications device during a meeting
2346411198Portable terminal device
2356408187Method and apparatus for determining the behavior of a communications device based upon environmental conditions
2366408034Framed delta sigma data with unlikely delta sigma data patterns
2376408008Circuit for attenuation of echos caused by line variations and an interfacing system for capacitively coupling a plurality of sources to a two-wire communication line
2386400958Communication network terminal supporting a plurality of applications
2396400803Voice over digital subscriber line call redirection for lifeline service
2406396922Telecommunications terminal card
2416393105Method and apparatus for monitoring local telephony service power on a hybrid fiber-coax network
2426393104Enhanced life-line service for cable telephone customers
2436389302Methods and apparatus for causing wireless communication devices to vibrate via piezo-ceramic vibrators
2446389288Mobile communication terminal capable of executing location-related services
2456389135Method and apparatus for deriving power from a clock signal coupled through capacitors
2466389134Call progress monitor circuitry and method for a communication system
2476385466Portable terminal device
2486385235Direct digital access arrangement circuitry and method for connecting to phone lines
2496377823Cellular mobile telephone apparatus and an alarm device therefor
2506377795Cellular phone with special standby feature
2516377681Signal line driving circuit with self-controlled power dissipation
2526373958Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversion
2536370389Communication network terminal supporting a plurality of applications
2546366791System and method for providing a musical ringing tone on mobile stations
2556363265Volume control for an alert generator
2566362943Active current limiter
2576362740Apparatus for providing thermal alert signal and control method thereof in skin-contact type terminal
2586359983Digital isolation system with data scrambling
2596359550Personal communication device and call process status signalling method
2606353668Method for optimizing stability of a line interface circuit in a telecommunications network
2616353347Power control circuit for a line driver
2626352451Jack assembly
2636351534Power supply for telecommunications device
2646351533System and method for protecting devices connected to a telephone line
2656351528Integrated ringer for short telephone lines
2666347133Telephone answering device with timer control

2001

2676333981Shelf driver unit and method
2686333664Low operating power, high voltage ringing switch circuit
2696333459Isolation apparatus for electronic equipment
2706332075Use of distinctive ringing in a wireless communication system to inform a called party of an increased billing rate
2716330330External resistor and method to minimize power dissipation in DC holding circuitry for a communication system
2726330328Modular digital telephone system and method including an universal telephony shelf
2736324412Telephone and module having a pin for providing temperature information and generating a silent alarm
2746323758Vibration generating unit
2756322400Battery termination panel
2766317593Intelligent cellular telephone function
2776317032Apparatus for informing a user of predetermined condition by vibration
2786314306Text message originator selected ringer
2796310954Ringer circuit
2806308086Portable cellular phone with custom melody ring setting capability
2816307891Method and apparatus for freezing a communication link during a disruptive event
2826304765Foldable communication device and method
2836304656Power supplying to CPU of telephone
2846304170Alerting apparatus
2856301358Dual-slope current battery-feed circuit
2866298133Telephone line interface architecture using ringer inputs for caller ID data
2876298132Ringing-tone control device for telephone set, using audio signal sent by caller
2886292668Communication network terminal supporting a plurality of applications
2896289070Digital isolation system with ADC offset calibration including coarse offset
2906285891Radio communication apparatus having a plurality of communication functions
2916278778System and method of power limiting call processing in telecommunications equipment
2926275690Cellular mobile telephone apparatus
29362723312-way radio with silent annunciation
2946271764Incoming call alerting method for a radio communication apparatus connected to an external apparatus
2956269256Foldable portable telephone set with automatic off-hook function
2966263218Incoming calling system
2976263074User programmable station set bass and treble control
2986263071Telecommunications functions management system providing distinctive alerting based on caller selected option
2996263015Analog/digital integrated subscriber circuit
3006259935Electro-mechanical-acoustic transducing device
3016255936Beeper security system
3026252784Power amplifier with feedback
3036252516Radio with silent and audible alerts
3046252515Radio with silent and audible alerts
3056246889System, method, and apparatus for delayed call answering
3066246761Automatic volume control for a telephone ringer
3076243399Ring signal generator
3086240176Method to alert a phone operator by magnetic means of an incoming call
3096239648System and method for dissipating heat in an electric device
3106233335Battery switching subscriber loop interface circuit
3116229985Communication apparatus
3126229845Bus driver with data dependent drive strength control logic
3136226536Charger capable of controlling alerting means and radio equipment consisting of the charger and a portable radio apparatus
3146226379Telecommunications functions management system providing distinctive alerting based on caller identifier
3156225897Telephone in-use indicator system
3166222922Loop current monitor circuitry and method for a communication system
3176218958Integrated touch-skin notification system for wearable computing devices
3186216017Separable cellular telephone and method for operating the same
3196215993Caller ID preview for mobile telephones
3206215633Active current limiter
3216208237Electro-mechanical and acoustic transducer for portable terminal unit
3226201865Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants
3236198816Capacitively coupled ring detector with power provided across isolation barrier
3246195572Wireless communications assembly with variable audio characteristics based on ambient acoustic environment
3256191684Remote supply circuitry
3266190227Incoming call reporting toy
3276188916Communication system of portable communication terminal, incoming call control system of portable communication terminal and incoming call notifying device of portable communication terminal
3286188909Communication network terminal supporting a plurality of applications
3296188567Power distribution apparatus and method
3306181237Method and apparatus for generating pressure based alerting signals
3316178230System and method for identifying a callee of an incoming telephone call
3326176710Battery feed connector for network power controllers
3336175721Communication device having incoming indicators

2000

3346167288Folded-type portable telephone set
3356167135Method and apparatus for generating a ringing signal
3366167134External resistor and method to minimize power dissipation in DC holding circuitry for a communication system
3376167132Analog successive approximation (SAR) analog-to-digital converter (ADC)
3386166621Method and apparatus for displaying a message which has been received
3396160887Telephone loop-current regulator
3406160885Caller ID circuit powered through hookswitch devices
3416160489Wireless communication device adapted to generate a plurality of distinctive tactile alert patterns
3426157716Power feed circuit providing both on-hook and off-hook power for telephone subscriber loop
3436154666Wireless communications assembly with variable audio characteristics based on ambient acoustic environment
3446148180Radio communication apparatus
3456148076Method and an arrangement for controlling the operating mode of a subscriber line interface circuit
3466144737Trunk interface circuit having function of battery feed to central office
3476144736T1 channel bank control and apparatus
3486144326Digital isolation system with ADC offset calibration
3496137189Line circuit apparatus for supplying power to a telephone set in telecommunication systems
3506134323Telecommunications system, an automatic branch exchange, a line card, a supply circuit for a telecommunications line, and a telecommunications subscriber device
3516134320Telecommunications functions management system providing selective alerting based on caller identifier
3526134310Telecommunications functions management system for managing outgoing calls from a plurality of telephone terminals
3536127933Portable communication terminal
3546125264Telephone apparatus
3556122367Subscriber line interface circuit
3566122353Method and apparatus for detecting a telephone CPE alerting signal
3576119090Subscriber line interface circuit which automatically adjusts the signal headroom on a telephone line and a method of doing the same
3586119022System for alerting portable communication device user of incoming call
3596116961Jack assembly
3606115469Telephone line ring signal and DC power generator
3616108532Incoming call control based on the moving speed of a radio communications apparatus
3626104794Architecture for minimum loop current during ringing and caller ID
3636094587Programming of a telephone's ringing tone
3646084961Circuit for monitoring battery voltages of telephone terminal facility, using power detector temporarily activated by ringing or off-hook signal
3656084959Method and apparatus for controlling the ring volume of a telephone
3666078816Method and apparatus for establishing clear wireless communication
3676078661Modular network interface device
3686075998Communication apparatus capable of announcing reception of a call by a melody sound composed by a user
3696075856Subscriber circuit
3706072859Apparatus and method of generating voice message of caller's number in case of incoming call in telephone
3716069950Dual-limit current-limiting battery-feed circuit for a digital line
3726058164Mode-switchable telephone and mode setting and switching methods for the same
3736055445Wireless communication apparatus and indication control method therefor
3746055416Prevention of audible control signal transmission
3756049700Automatic volume adjustment in a wireless handset
3766049471Controller for pulse width modulation circuit using AC sine wave from DC input signal
3776047195Sound volume setting device for a portable telephone
3786044279Portable electronic apparatus with adjustable-volume of ringing tone
3796035211Dual use speaker for both voice communication and signalling
3806032058Cellular mobile telephone apparatus and an alarm device therefor
3816028916Method and apparatus for maintaining availability of lifeline telephony service on a hybrid fiber-coax network
3826028531Terminal units for a mobile communications system
3836026159Integrated ringer for short telephone lines
3846020732Flux cancelling transformer line circuit
3856018671Silent call accept
3866018654Method and apparatus for downloading tones to mobile terminals
3876014573Function for facilitating use of a double-acting communication device and a double-acting communication device

1999

3886009167Double-bell ringing system of a telephone
3896006114Radiotelephone enabling adjustment of alerting indicator volume/level during incoming calls
3906002763Telephone with a mute ringer function having an automatic ringer reactivation capability
3916002761Multi-line programmable telephone call annunciator
3925999593System and method for automatic PBX detection
3935995852Communication terminal equipment and call incoming control method
3945991604Ring detecting circuit and method for wireless/wired composite telephone
3955987120Device for identifying line reversal/ringing signal of a telephone set
3965982598Protective circuit for a grounded power plant
3975978471Method and device for detecting a ringtrip
3985978451Telecommunications functions management system providing selective alerting based on caller selected option
3995970139T1 channel bank control process and apparatus
4005966655Automatic determination of audio or vibration alerting for an incoming call in a wireless handset
4015963877Telephone call receiver indicator
4025960367Incoming calling system
4035960076Method and apparatus for determining the deviation of longitudinal signal components from a predetermined value
4045960075Switchmode power converters for telephone subscriber line interface circuits
4055956626Wireless communication device having an electromagnetic wave proximity sensor
4065953408Telephone including an electromechanical transducer, method of adapting the frequency response of such a transducer and method of coding a melody
4075953407Distinctive ringing and distinctive call-waiting tones in an ISDN
4085946636Quick-recognition visual notification system for use in radiotelephones
4095943418Ring-trip circuit
4105940775Method of and apparatus for selectively generating incoming ring in digital cordless telephone
4115940501Counter based ringer interface
4125940500Series equipment with DC line hold transfer
4135930724Electronic apparatus with alarm function
4145926537Generating a distinctive ring tone for a calling party subscriber within a telecommunications network
4155926533Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
4165924046Portable radio telephone with sound off-hook production
4175924044Modular communication device and method of providing communications therewith
4185918189Exchangeable hardware module for radiotelephone
4195912958On-hold device
4205912513Method and apparatus for reducing power dissipation in DC termination circuit
4215905786Console and extension telephone system
4225903448Four quadrant flyback converter, method of operation thereof and power plant employing the same
4235903076Vibration actuator for pager
4245901221Driving stage for driving differential amplifiers of a subscriber line interface circuit
4255901219Method for ring signal detection
4265898364Electronic equipment having vibration motor
4275898296Isolation regulator
4285892817Wireless system for alerting individual to incoming telephone call
4295889858Standby high voltage analog line feed
4305889509Communications terminal apparatus and display method thereof
4315884156Portable communication device
4325881148T1 channel bank control process and apparatus
4335881147Ring varying technique for a telephone
4345881129Self-monitoring line interface circuit
4355878354Portable telephone set usable as a paging receiver for remote notification and response to calls and messages
4365878133Digital direct current feed control for a communication system
4375877695Visual alarm for a communication module
4385875245High voltage detection circuit, bell signal detection circuit and non-ringing reception detection circuit
4395872842Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit
4405870684Radio communication apparatus with adjustable alert tone
4415870683Mobile station having method and apparatus for displaying user-selectable animation sequence
4425870466T1 channel bank control process and apparatus
4435867796Portable telephone set capable of being put in a holding mode by operation of a vibration unit which is for announcing reception of an incoming call to a user

1998

4445854839Dual voltage, self-monitoring line circuit
4455848362Portable alerting unit for alerting a user to call arrival to portable radio apparatus
4465848149Subscriber line interface and power circuit
4475848148Communication apparatus
4485845190Cable access device and method
4495844983Method and apparatus for controlling a telephone ring signal
4505841853Telephone apparatus with interrupt call processing capability
4515838788Telephone ringing signal generator
4525835863Wireless telephone for cellular telephone system
4535828748Method for customizing operation of a line interface circuit in a telecommunications network
4545828728Telecommunications network
4555828558PWN controller use with open loop flyback type DC to AC converter
4565822702Radio receiving terminal having common receiver circuitry for both receiving a radio signal including a call number and a remote control signal
4575818927Circuit for controlling an on-hook voltage by the use of a balanced amplifier without supplying a constant current to the balanced amplifier
4585818923System and method for supressing pulse dialing feedback occurring particularly with auxiliary acoustic ringers in socket telephone systems
4595815569Method for controlling power losses associated with line interface circuits in telecommunications networks
4605812658Method and circuit for failsafe switch-hook detection during fault in a telephone system
4615812648Telephone ringer control device
4625809134Telephone interface circuit with impedance termination during call pauses
4635809131Ringer circuit for generating sine wave
4645806948Retrofittable battery cabinet for telecommunications enclosures
4655801520Supply voltage switching apparatus
4665796279DC application circuit with suppressed DC magnetization
4675790654Digitally controlled ring signal generator
4685787365Apparatus for combining cellular telephone ring signals and PSTN ring signals
4695787168Mobile telephone fastening with vibration function
4705786106Battery pack with interchangeable tag-along supplemental feature cartridge particularly for cellular telephones
4715784001Method and apparatus for presenting graphic messages in a data communication receiver
4725777463Device for auto-adapting to the impedance of a supply line
4735768368T1 channel bank control process and apparatus
4745767787Reduced size radio selective call receiver with a tactile alert capability by sub-audible sound
4755767778Event sensing circuit and alert generator
4765764755Ring-signal generation in a SLIC
4775764751Portable telephone set with a vibrator having an automatic switching function
4785764730Radiotelephone having a plurality of subscriber identities and method for operating the same
4795754644Method for customizing operation of a battery feed circuit in a telecommunications network
4805752203Portable radio apparatus having cable-incorporated hand strap
4815745563Telephone subscriber line circuit, components and methods
4825740241T1 channel bank control process and apparatus
4835737411Battery switching in a telephone subscriber line interface circuit
4845734714Subscriber line interface circuit capable of realizing by a C-MOS circuit
4855734712Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing
4865734711Telecommunication system with energy-saving mode
4875729589Apparatus and method for incoming call detection and alarm circuitry for cellular telephones
4885724468Electronic backplane device for a fiber distribution shelf in an optical fiber administration system
4895724411Method for selectively alerting multiple telephones of an incoming call
4905723996Leadframe for plastic-encapsulated semiconductor device, semiconductordevice using the same, and manufacturing method for the leadframe
4915722071Portable receiver including transducer for notifying user of messages received in a remote mobile communications device
4925721774Longitudinally balanced, dual voltage line-feed circuit
4935719929Generalizing specialized telephone numbers
4945712910Ring trip circuit having a simple trip detecting circuit of a high response speed
4955712779DC electrical power supply system
4965706343Integrated interface circuit for driving a subscriber line
4975706157Power distribution system with over-current protection

1997

4985703931Portable radio telephone with impulse movement or sound off-hook production and signalling
4995699422Telecommunication device
5005699420Bell sound synthesizer
5015696817Apparatus and method for determining the source of a telephone communication
5025696497Radio with silent and audible alerts
5035694465Integrated ringer for short telephone lines
5045687227Telephone with user recorded ringing signal
5055684874Ringtrip judging circuit
5065682423Electrical power and telephone ringer signal distribution system
5075675640Telephone ringing signal detector
5085671272Current mode ring trip detector
5095666406Hazard prevention for telephone line interface circuits
5105666397Individual telephone line call event buffering system
5115666355Power consumption control method and apparatus for a communication system subscriber unit
5125664002Method and apparatus for providing power to a coaxial cable network
5135663878Apparatus and method for generating a low frequency AC signal
5145661794Telephone line interface circuit with voltage control
5155661791Method and apparatus for enhanced distinctive call redirection
5165661788Method and system for selectively alerting user and answering preferred telephone calls
5175659610Battery feed circuit
5185659608Line feed circuit with logic level controlled ringing
5195655016Distinctive telephone annunciator
5205655013Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
5215654592Power supply controller
5225651052Apparatus and method for incoming call detection and alarm circuitry for cellular telephones
5235649020Electronic driver for an electromagnetic resonant transducer
5245649009Differential longitudinal amplifier for a subscriber line interface circuit
5255649007Telephone set of distinctive ringing type capable of generating different calling sounds after the telephone set is connected to remote calling party
5265649006Communication apparatus having function of generating calling signal
5275649002Method and apparatus for detecting a telephone CPE alerting signal
5285642413Telephone call alert device with selectable alert modes
5295642412Isolated high impedance, DC current sources for telecommunications applications
5305640441Apparatus and method for incoming call detection and alarm circuitry for cellular telephones
5315638421Apparatus and method for incoming call detection and alarm circuitry for cellular telephones
5325636274Switch controller and method
5335636273Integrated ring detection circuit and power cross detection circuit with persistence timers
5345635897Mobile phone alarm
5355629931Information transmission system
5365627491Plural stage circuit with automatic adaptation to first and second voltage ranges of a common voltage source
5375625683Method of and telephone with call-reminding and auto-dialing
5385619568Cordless phone with time-out controlled ringer
5395619567Variable DC feed characteristic in a subscriber line interface circuit
5405617472Noise suppression of acoustic signal in telephone set
5415612998Integrated interface circuit for driving a subscriber line
5425610978Ring discriminator
5435602911System and method for eliminating bell tap on analog telephones
5445602908Calling party identifying apparatus and method therefor
5455602900Radio Telecommunication apparatus
5465600713On-board ring signal generator
5475598461Personalized annunciation signaling phone unit
5485596637Power dissipation manager circuit for an interface device feeding a subscriber telephone line

1996

5495583934DC level control for an electronic telephone line card
5505579535Personal communication system providing supplemental information mode
5515579386Telephone network alerting cadence control system
5525577104Method for system and message activation based on distinctive ringing
5535574772Personal apparatus for receiving radiotelephone communications
5545570421Method and apparatus for controlling the drive frequency of a LED
5555570025Annunciator and battery supply measurement system for cellular telephones
5565570003Switching device with a feeding circuit for DC power supply to a subscriber's terminal unit
5575561704Proximity based toll free communication services
5585557658Communications marketing system
5595555301Power supply apparatus and method for energizing telephone alerting mechanisms and circuitry
5605553132Method and an arrangement for generating a ringing signal
5615553125Telephone apparatus with calling line identification
5625548592Home and small business phone system for operation on a single internal twisted pair line and methodology for operating the same
5635546025Low frequency discrimator using upper and lower thresholds
5645544241Telephone ring detector
5655543669Remote feed circuit in communication systems
5665541543Regulating device for a telephone loud-speaker
5675539805Power supply system including ringing voltage reset under low input voltage conditions
5685537657Telecommunications device with means for learning and responding to a distinctive ring cadence
5695535273Circuitry for superimposing small, low energy signals and large, essentially higher energy signals
5705535272Sensor circuit for a telephone line
5715530931Method and apparatus for providing a look ahead feature for enhanced call forwarding in a telecommunications system
5725528697Integrated vibrating and sound producing device
5735528688Telephone battery feed circuit including noise reduction circuit
5745528682Double duty capacitor circuit and method
5755526418Ringer circuit
5765524061Dual mode transducer for a portable receiver
5775521964Visual message waiting indication in a telephone voice message system
5785519775Device for electrical and/or electronic telephone circuits, designed to limit the power dissipated within them
5795517565Integrated ringer relay circuit and method
5805515434Impedance setting circuit for a SLIC
5815515433Resistance forward telephone line feed circuit
5825515417Ground key detector for a SLIC
5835511118Method of providing d.c. feed to a telephone line
5845509068Electronic ring monitoring device for telecommunications line
5855500895Telephone isolation device
5865500893Telephone apparatus, information processing apparatus and information communication terminal
5875493611User configurable telephone with alarm feature
5885491746Unique ringing on a prime telephone
5895490054Ringing generator and method for converting DC to AC having continuously adjustable amplitude
5905485516Line termination for a telephone line
5915483592Ringer unit driving system in a subscriber transmission system
5925483574Communication terminal equipment
5935481599Automated audio output device for a telephone set

1995

5945479476Mobile telephone having groups of user adjustable operating characteristics for facilitating adjustment of several operating characteristics
5955469282Power supply system for optical network unit of a fiber in the loop
5965467384Method and apparatus for providing power to a coaxial cable network
5975459783Acoustic feedback suppression device particulary for auxiliary ringers in plug-in telephone systems
5985457741Subscriber transmission system
5995454032Method of establishing communication link to one of multiple devices associated with single telephone number
6005452354Ringing tone apparatus
6015450618Full duplex and half duplex communication unit with volume setting
6025450613Mobile communications equipment which detects and notifies when it is moved into or out of a service area
6035448620Volume control for a dual mode communications device
6045446785Telephone terminal equipment in which telephone numbers of callers are displayed
6055444777Battery feed for telephone line cards
6065442695Ringer circuit
6075442694Ring tone detection for a telephone system
6085442692Telecommunication system having a capability of changing the alerting tone
6095440262High-efficiency Ring/MWL generator
6105436964Programmable call progress tones for a switching system
6115428682Subscriber line interface circuit with reduced on-chip power dissipation
6125428670Communications marketing system
6135426695Ringing signal control circuit capable of suppressing surge voltage
6145422948Subscriber line interface for improving the frequency characteristics of the transmitted and received signals
6155422656Personal communicator having improved contrast control for a liquid crystal, touch sensitive display
6165414309Circuit for applying direct current to winding
6175406623Method and apparatus for ringing telephone stations
6185404582Aural annunciator circuit for a receiver
6195404399Telephone visual signaling device
6205404391Incoming call alert system for cellular telephones without wired connection thereto
6215402485Two-wire termination impedance generation circuit of subscriber circuit
6225402484Telephone circuit assembly
6235402482Ring trip deciding circuit
6245402480Call signal generating circuit
6255396555Power and signal transmission system
6265396548Communication system utilizing information received during a silent interval between ringing signals
6275392347Ringing tone signal detecting circuit
6285390249Receiver device for receiving ringing signals in an off-hook line condition
6295388150Automatic incoming telephone call identification and disposition system
6305379032Impulse transducer enunciator

1994

6315369698Woodpecker simulating telephone ringing device
6325369690Telephone call detecting circuit and a method of remotely accessing and testing a telephone
6335369518Optical communication system and method electrical power transmission for thereof
6345367567Subscriber apparatus with ringer generator for sending ringer signal to subscriber line
6355363431Visual message waiting indication in a telephone voice message system
6365361300Balancing resistor and thermistor network for telephone circuits, and combination thereof with relay
6375359655Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances
6385355401Method and apparatus for providing telephony power through a coaxial cable network
6395347577Battery feed circuit for supplying feed current to telephone set
6405347565Order wire device having function for reducing noise in communication system having a plurality of order wire devices
6415343520Impedance synthesis multile loop using filtering means
6425343084Variable level periodic excitation circuit for a capacitive load
6435341108Amplifier biasing circuit
6445337356Ringing circuit for use in portable telephone set
6455337354Tip-ring voltage correction circuit
6465335272Method and arrangement for supplying direct current to a telephone line
6475335271Ring trip detection circuit
6485335270Bell signal generating circuit
6495333196Current limiting battery feed arrangement
6505333192Line interface circuit
6515333190Telephone ring detection method and apparatus
6525329588Telecommunication line circuit
6535329585Subscriber line interface circuit for controlling AC and DC output impedance
6545329584Interface circuit to quickly establish a loop current
6555329577Telephone having touch sensor for responding to a call
6565323461Telephone line interface circuit with voltage switching
6575323460Enhanced subscriber line interface circuit
6585323456Digitally controlled ringer signal generation
6595323455Ringer circuit, particularly for a telephone set
6605323453Power down feed
6615321740Telephone marketing system
6625321596DC/DC/AC power supply for a subscriber interphase unit
6635317622Ringing circuit for use in a telephone set for detecting a mobile mode or a portable mode of the telephone set
6645315653Current limited subscriber interface circuit
6655313661Method and circuit arrangement for adjusting the volume in a mobile telephone
6665311518ISDN interface circuit and system using the same
667530740720 Hz ring generator using high frequency PWM control
6685307406ISDN power source detection circuit
6695303284Ringing circuit for use in portable telephone set
6705295185Ringing signal generation circuit with protection against overvoltage
6715293420Ring trip circuit
6725280523Telephone line message waiting and ring indicator

1993

6735274704Transformer telephone line interface circuit
6745274703Automatic loss control circuit
6755274702Wideband telephone line interface circuit
6765274701Telephone alerter
6775260996Current limited electronic ringing generator
6785260992Key telephone system with reduction of delay of ring tone generation at telephone set
6795260937Power conserving technique for a communications terminal time slot interchanger
6805255317Subscriber line interface circuit for serving ISDN subscribers using echo cancellers and POTS subscribers
6815253290Circuit arrangement for the transmission of telecommunication signals
6825253289Terminal connection device
6835249226Apparatus for controlling a current supply device
6845247573Telecommunications system comprising a circuit arrangement for at least one subscriber station
6855233649Telephone ringing module
6865233641Radio telephone equipment having a sounding device for generating alert tone indicative of response of called subscriber
6875230018Communication system for activating an optical display in a communication terminal of a communication switching station
6885228081Ringing signal control circuit for an enhanced subscriber line interface
6895224154Line powered DCA including dual programmed microcontrollers
6905218634Ringer assembly
6915216708Calling signal controller
6925216707Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltage
6935216704Method for remote power fail detection and maintaining continuous operation for data and voice devices operating over local loops
6945214692Bypass for telephone switching system
6955202917Telephone calling method and telephone apparatus
6965201068Radio telecommunications apparatus
6975195128Communication system, particularly a telephone communication system
6985191507Polarity inverting circuit
6995189697Line interface circuit
7005185738Fiberoptic telephone systems
7015181023Terminal unit of a mobile communication system
7025180987DC-to-AC symmetrical sine wave generator

1992

7035175764Enhanced high voltage line interface circuit
7045172409Precision FET control loop
7055172408Speakerphone state-controlled alerting arrangement
7065172092Selective call receiver having audible and tactile alerts
7075163090Over-current verifier circuit for an enhanced subscriber line interface
7085159627Adaptive ringer for telephone terminal
7095157721Control circuit for an electrical telephone accessory
7105157711Telephone terminal device
7115148475Reduced contact resistance on a SLIC
7125142569Apparatus for selectively enabling subscriber device to respond to ringing signal in dependence upon ringing cadence
7135140630Added main line apparatus
7145138658Subscriber line interface circuit providing regulated current
7155136630Intrinsically safe telephone
7165131033Sealing current generator for a telephone circuit
7175128992Hybrid circuit
7185128981Radio communication system and a portable wireless terminal
7195117449Dual receiver apparatus for integrated paging and radiotelephone functions
7205113426Ground fault detector
7215103387High voltage converter
7225099513Integrated circuit for generating a melody and ring
7235097503Electronic subscriber line connection circuit

1991

7245073922Communication terminal apparatus
7255056135Method of automatic equalized distribution of ring loads for telephone exchange system
7265052039Line interface circuit
7275051730Circuit arrangement for charging rectifiers for DC energy storage devices in telecommunications systems, particularly telephone switching systems
7285050210Metallic current limiter
7295046089Subscriber line interface circuit with power-down mode
7305040209Telephone ringing monitoring and control system
7315027391Call management system
7325025467Cellular telephone ring annunciator
7335020102Semi-floating AC/DC active termination circuit with current sink
7345014305Line interface circuit
7355010566Cordless telephone
7365001748Ringing signal generator
7374998273Telephone line called number recognizer
7384998271Telephone accessory
7394995111Ring trip circuit for subscriber telephone
7404995075Apparatus and method for encoding telephone ringing signals
7414993064Subscriber line interface circuit and transformer therefor northern telecom limited
7424985912Radio telephone device
7434982426Telecommunications line interface circuits
7444982422Terminating circuit in a battery feed circuit of an electronic exchange system

1990

7454972466Digital composite tone alerting
7464972452Digital bypass for telephone system
7474969186Telephone message waiting system and apparatus
7484969180Cordless pen telephone handset
7494965692Overload detector and protection circuit
7504964158Power supply for telephone exchange
7514962545Volume level retention in a pager
7524962527Series ringing signal generator
7534962520Composite ringing and coin control voltage detector and method
7544961222Apparatus in a telecommunication system for supplying power to a telephone set
7554961219Circuit for synthesizing an impedance across the tip and ring leads of a telephone line circuit
7564959853Frequency responsive selective ringing circuit
7574955053Solid state ringing switch
7584951039Animated data display interleaving
7594942600Communication apparatus for generating a call signal from a telephone set to a data terminal
7604939775Telephone ringing detector
7614935960Battery feed circuit
7624926467Line card with distributed signaling voltages
7634926459Hearing assist telephone
7644924511Ring signal generator for generating ring signals of different frequencies and power levels in response to user selection
7654924193Volume control circuit for use in portable telephone or the like
7664922531Line interface circuit
7674922527Small electronic apparatus
7684920561Ring detector for telephone line
7694916734Apparatus for separating dc current and ac current components of a composite signal
7704914693Telephone subscriber circuit
7714910769Telephone line interface circuit
7724908857Isolated drive circuit
7734908856Switching voltage regulator for an interface circuit in a telephone subscriber line
7744908854Apparatus for connecting and disconnecting a ringing signal to a called subscriber
7754899382Telephone circuit using DC blocked transformer and negative impedance technique
7764897872Interface circuit between a subscriber's telephone line and exchange control components, with reduced current consumption in the case of a grounded cable
7774896351Apparatus for separating dc current and ac current components of a composite signal

1989

7784884294Portable cordless telephone set for outputting various discriminiation sounds with simple circuit construction
7794875232Telephone power distribution and isolation system
7804872199Battery-feed circuit for exchange
7814866768Station line interface circuit for a telecommunication network
7824866767Subscriber line interface circuit
7834866766Telephone device having customized ring capability
7844866587Electronic ringing signal generator
7854864609Telephone line interface circuit
7864862495Telecommunications subscriber line interface circuit and party identification facility
7874862309Protection circuit for battery feed circuit
7884860287Network having a synchronizer for synchronization between a primary and a remote station
7894856059Semiconductor subscriber line interface circuit with enhanced survivability
7904856056Apparatus for timely controlling the sound characteristic of a signaling means of a voice communication device
7914856055Controllable telephone annunciator
7924853959Method and apparatus for feeding power to a telephone line such that for restricted battery voltage there is enabled the transmission of an undistorted speech signal
7934852162Subscriber line interface circuit
7944849850Circuit for protecting electronic devices against overload
7954847896Monolithically integratable telephone circuit for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing
7964841565Monolithically integratable telephone circuit for feeding a subscriber's telephone line
7974841564DC-supply arrangement for a telecommunication line
7984837818Telecommunication line circuit
7994833709Remote telephone signaling circuitry and device
8004829567Line interface circuit
8014827505Subscriber line interface circuit
8024827503Integrated ringing circuit and a ring trip circuit for the same
8034821315Electronic contacts and associated devices
8044821314Message and ringing signaling device for a telephone installation
8054809258Circuit arrangement for the indication of loop closure during the ringing condition
8064805213Ring detector
8074803721DC control circuit
8084800589Voltage regulator control circuit for a subscriber line interface circuit
8094800586Compensation circuit for use with an integrating amplifier
8104799144Multi-function communication board for expanding the versatility of a computer
8114797917Monolithically integratable telephone circuit for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing

1988

8124789999Line circuit for coupling a subscriber set to a switching facility to provide a complex impedance match
8134782518Apparatus for converting distinctive ring to selective ring in telephone lines
8144780696Multifilar transformer apparatus and winding method
8154767980Inductance multiplier circuit
8164764956Active impedance line feed circuit
8174761812Constant power telephone line circuit
8184760595Subscriber line interface circuit having means for combining DC and AC feedback signals
8194757528Thermally coupled information transmission across electrical isolation boundaries
8204752952Subscriber circuit link interface for an automatic telephone exchange
8214748659Calling signal transmission apparatus
8224748652Circuit for detecting abnormality in feeder
8234741031Intrinsically safe telephone
8244737989Ringing circuit
8254737988Current supply circuit
8264737987Circuit for evaluating call signals in a telecommunication system
8274737732Low voltage operational amplifier having a substantially full range output voltage
8284736415Resistive line feed circuit
8294736412Method of and circuit arrangement for evaluating the output signals of current flow detectors in telecommunication facilities
8304734937Telephone installation
8314734936Ringing signal sending-out circuit
8324734933Telephone line status circuit
8334731828Ring trip detection in telecommunications exchanges
8344731827Interswitch line circuit
8354727574Subscriber line interface circuit with improved d.c. balance
8364727572Telephone annunciator with low battery indication
8374726060Line circuit for driving a ringer and a service indicating lamp in a telephone set
8384723280Constant current line circuit
8394723275Circuit arrangement for generating an acoustic ringing signal in a subscriber telephone set
8404718084Overload protection circuit for a telephone subscriber line feed circuit

1987

8414712233Monolithic telephone subscriber line interface circuit
8424709388Subscriber telephone line interface circuit with reduced power stand-by mode
8434707855Personalized telephone signaling circuitry and device, and methods of constructing and utilizing same
8444706281Dynamic impedance element for a battery feed circuit
8454703500Power amplifier
8464701947Circuit arrangement for suppressing interference signals on the receiving arm of a telephone subscriber line circuit
8474686700Telephone off-hook detector circuit
8484685130Subscriber line circuit having an improved loop current supply circuit
8494685129Power transmission arrangement for telecommunications systems
8504682355Electronic feeding bridge for a space division switching network
8514679232Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed
8524679229Ringing detection circuit
8534679132Floating battery feed circuit using multifilar transformer
8544677669Battery feed circuit for a pair of subscriber lines
8554677664Method and apparatus for an improved ring trip detection telephone circuit
8564674119Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
8574665547Limiting amplifier for common mode feedback in telephone line feed circuits
8584661978Subscriber line interface circuit having an impedence synthesizer
8594658419Telephone ringer circuit
8604656661Switched capacitor coupled line receiver circuit
8614656659Programmable ring signal generator
8624652701Ringing application circuit
8634648019High efficiency ringing generator
8644646347Ringing signal reformatting circuit
8654645881DC level trip detector
8664644579Shunt regulator for hands-free telephone
8674644476Dialing tone generation
8684644106Apparatus for timely controlling the sound characteristic of a signaling means of a voice communication device
8694639551Regulated power supply circuit particularly for telephone set
8704636585Telephone installations

1986

8714633038Supply circuit for a variable load, particularly for a line circuit in telephone systems
8724631366Battery feed circuit for subscriber line
8734631361Programmable ring generator
8744631360Apparatus for the current supply of a subscriber set from an exchange
8754631359Arrangement for supplying current to a subscriber telephone set
8764622442Electronic hybrid having synthesized impedance circuitry
8774622441Two-wire/four wire communication interface with noise rejection
8784622439Detection of ground or loop start configuration in telephone loop signalling circuit
8794617426Method for current supply to a subscriber telephone from a telephone exchange
8804614840Telecommunication line circuit and associated polarity reversal circuit
8814612417Electronic battery feed circuit for telephone systems
8824611097Sine wave ring generator
8834609782Solid state signal insertion circuit and method for use in a telephony system or the like
8844609781BORSHT/SLIC auto balancing technique
8854608461Subscriber circuit for a telephone network
8864607141Active network termination circuit
8874607140Build out capacitor circuit
8884605824Circuit arrangement for telecommunication exchange systems, particularly telephone exchange systems with switch facilities for emitting signals
8894602130Dual voltage source feed circuit configuration for a telephone line circuit
8904600811Subscriber line interface circuit
8914599494Ring sense telephone tone ringer circuit
8924598173Interface circuit for a subscriber line circuit
8934595797Ringing signal generator for a subscriber telephone set
8944593272Communication system power arrangement
8954593156Grounded tip detector
8964591661Portable cordless telephone transceiver-radio receiver
8974590334Supply circuit included in a DC-magnetized hybrid transformer
8984588860Battery feed circuit for telephone subscriber line
8994588858Differential amplifiers and method of differentially driving a two-wire line circuit
9004586119Off-line switching mode power supply
9014585905Overvoltage protection circuit for SLIC
9024584576Ringing signal generator
9034581691Balanced constant current sensing circuit inherently immune to longitudinal currents
9044581487Universal DC feed for telephone line and trunk circuits
9054578542Line powered flasher circuit for ringing signal
9064578541Telephone line interface circuit
9074577064Auto-balance circuit for battery feed in a telephone circuit
9084575585Synchronous programmable signal generator and method
9094571462Multiple use digital tone generator in telephone
9104571460Active impedance line feed circuit with improved ground fault protection
9114567333Electronic tone ringer with distinctive signaling circuitry
9124567331Electronic hybrid having synthesized impedance circuitry

1985

9134562525DC Power supply circuit for line interface circuits
9144562308Subscriber connection circuit comprising feed resistors which can be bridged in low-ohmic fashion and an indication circuit which effects different indications
9154560843Electronic external line repeater
9164560835Power supply arrangement for applying direct current to subscriber circuits
9174560834Current limiter circuit for battery feed in a telephone circuit
9184558272Current characteristic shaper
9194558186Single power supply battery feed circuit
9204558183Opto-coupler interfacing circuit
9214555595Sampled port data switching system employing interactive processors
9224554412Resistive line circuit
9234552994Apparatus for isolating the voice frequency path from the floating battery feed during signalling
9244551670Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level
9254546214Line use indicator for telephone sets sharing a single line
9264540853Apparatus for detecting a loop during ringing
9274540852Electronic subscriber junctor
9284539438Active impedance transformer assisted line feed circuit with supervision filtering
9294539437Stored program power control system for improving energy efficiency for telephone sets connected into a local telephone communications system
9304538032Interface circuit with impedance adaptation means
9314536619Ringing signal detection circuit
9324536614Supervision and dial pulse detection circuit for a telephone subscriber line
9334535303Driver circuit
9344533792Circuit for switching between ring signal and message waiting signal without bell tap
9354532384Line feed circuit including negative impedance circuit
9364532381Active impedance line feed circuit
9374528425Method of and circuitry for detecting, at a telephone exchange, the lifting of a subscriber's handset in response to ringing current emitted by the exchange
9384527157Single fault tolerant CCIS data link arrangement
9394525602Method of and a circuit for energizing a subscriber's circuit in a telephone system
9404524246SLIC II--common-mode current rejection
9414524245Ring trip detection system
9424523058Ringer signal wave shaping circuit
9434514596Telephone handsets
9444514595Active impedance line feed circuit
9454511763Floating dc current source for a subscriber loop circuit
9464508937Method and circuitry for encoding telephone ringing signals
9474504701Telephone having circuitry for reducing the audio output of the ringing signal
9484503289Line circuit with flux compensation and active impedance termination
9494500844Ringing signal generator employing delta-modulation power amplification techniques
9504499532Floating battery feed circuit
9514496798Ringing circuit for telephone subset, designed as an integrated circuit
9524495652Control arrangement for radio apparatus
9534492821Subscriber connection circuit
9544491700Hybrid circuit in a telephone subscriber interface circuit
9554491691Electronic tone ringer

1984

9564490580Subscriber line circuit comprising a controllable DC/DC converter as a battery feed circuit
9574489222Telephone line interface
9584484032Active impedance transformer assisted line feed circuit
9594481463Current mirror circuit
9604480154Automatic telephone silencer
9614479034Arrangement of interactive processors for control of ports
9624477697Method and circuitry for encoding telephone ringing signals
9634476351Subscriber loop current regulator
9644476350Battery feed circuit
9654473719Switchhook status detector
9664472608Subscriber line interface circuit
9674472602Telephone set with transducer/ringer
9684471169Arrangement of interactive telephone switching processors and associated port data storage means
9694467310Telephone subscriber line battery feed resistor arrangements
9704467269Start-up circuit for negative inductance multiplier
9714467144Telephone annuciator extender
9724465967Current supply circuit
9734463307Negative inductance multiplier circuit including temperature compensation
9744459435Telephone privacy apparatus
9754458112Floating subscriber loop interface circuit
9764455456Digital supervisory circuit for a telephone system
9774451773Rectifier control system for a DC power plant system
9784451703All electronic interface for telephony system
9794451702Arrangement of interactive telephone switching processors for performing timing analyses of port events
9804447675Ring-trip detector
9814447673Ring trip apparatus for a line circuit connected to DCO switch
9824446339Rotary dial decoder
9834445006Four-wire conversion circuit for a telephone subscriber line
9844443669Subscriber connection circuit
9854443663Filtering of port data in a switching system employing interactive processors
9864440980Overvoltage protection for a line circuit
9874436960Telephone ringing signal generator
9884435803Analog subscriber/trunk module with shared ringing source and ring-trip
9894433213Subscriber's line circuit for telecommunications networks
9904431874Balanced current multiplier circuit for a subscriber loop interface circuit
9914431869Telephone line feed
9924431868Solid state telephone line interface circuit with ringing capability
9934429186Floating battery feed circuit for telephone subscriber line interface
9944429185Voltage detector circuit
9954426587Power supply distribution system

1983

9964421953Telephone tactile alert system
9974419542Battery feed circuit
9984415961Telephone ringing signal generator
9994415775Arrangement for exchanging signals between separated circuits
10004414435Interface circuit with flux cancelling transformer circuit
10014414434Electronic subscriber line interface circuit having means to equalize current through the output differential amplifier
10024410766Power saving line circuit
10034409439Controllable telephone call annunciator
10044409438Ringing control circuit in a telephone switching system
10054406929Hook status detector for a subscriber loop interface circuit
10064406927Electronic tone ringer
10074406004Ring scheduling apparatus for a digital multiplexed telecommunication system
10084403115Station identification circuit arrangement
10094402039Telephone line circuit
10104398143Remote supply circuit for analog two-wire connection
10114396805Ring trip detector for a subscriber line interface circuit
10124388500Electronic hybrid
10134387273Subscriber line interface circuit with impedance synthesizer
10144385385Circuit for monitoring a digital signal generator
10154385336Current supplying circuit with shorted-to-ground fault detecting function
10164384171Automatic telephone silencer
10174380688Telephone ringing range extender
10184379210Ringing detector for use by the deaf
10194375015Improved electronic hybrid circuit
10204374307Ringer system for a telephone
10214374306Zero-loss automatic polarization protection device
10224374303Power supply control circuit for subscriber carrier telephone system
10234373118Battery feed circuit
10244371789Power control arrangement
10254370526Arrangement for applying a ringing voltage to a subscriber's line
10264367376Electronic telephone ringer including anti-bell tap provisions

1982

10274365116Digital ringing-signal generator
10284362908Circuit arrangement for emitting ringing signals in a telephone system
10294361732Trunk interface circuit with current compensation
10304359610Telephone ringing circuit
10314359609Circuit with feedback for controlling the impedance thereof
10324358645Loop sensing circuit for use with a subscriber loop interface circuit
10334357495Telephone line feed
10344357494Impedance canceller circuit
10354356355Apparatus for detecting the closure of a subscriber's line during ringing
10364356354Electronic subscriber junctor
10374355209Programmable line circuit
10384355206Ringing control device
10394354062Communication system signaling circuit
10404350964Impedance generator circuit
10414349703Programmable ring signal generator
10424346422Power-distribution network for telecommunication system
10434346265Annunciator
10444345169Zero crossing detector
10454345117Telephone line feed circuit
10464343971Subscriber drop circuit for controlling drop current with load and maximizing power usage
10474341928Ringing signal supply
10484340869Amplifier for use in a line circuit
10494340785Ringing signal supply
10504331913Precision negative impedance circuit with calibration
10514331838Telephone ringer isolator circuit arrangement
10524327254Ringer circuit for telephone
10534322586Transformerless line interface circuit
10544321430Subscriber's connecting network comprising a symmetrical power amplifier for feeding a subscriber's line
10554320260Circuit arrangement for determining the connection condition of a subscriber line in a telecommunications network
10564320258Arrangement for requesting service for called telephone subscribers
10574319093Transmission bridge for a subscriber set
10584317963Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control
10594315207Current controlled battery feed circuit
10604315206Current supply circuit for telephone exchange
10614315109Electronic ring sounder for a speaker telephone
10624315106Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems
10634314106Line circuit
10644313034Connecting circuit for a telephone line
10654310733Arrangement for applying signals to a telephone line
10664310728Ringing device for a private automatic branch exchange
10674309748DC/DC Stabilized voltage converter unit
10684309664Digital energy line sensor
10694309578Telephone ringer load simulator
10704309574Electronic tone ringer

1981

10714306122Telephone line circuit
10724306118Telephone set ringing current injection device
10734302636Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange
10744301335Visual telephone or other annuciator ringing indicator
10754301334Telecommunication subscriber line access circuit with ground key and insulation fault indication
10764300023Hybrid circuit
10774296337Resistance detector with delayed hysteresis
10784292604Relaxation oscillator with plural constant current sources
10794292479Separation and balance device for telephone exchanges
10804292478Interface circuits
10814292473Loop supervision circuit
10824289933Dial pulse detection
10834287393Transmission bridge for a subscriber's circuit
10844287392Integrated circuitry for exchanging signals between telephone station and central office
10854284854Universal signal generator for generating telephone system high level signals
10864284853Telecommunication subscriber line access circuit with ground key indication and a device for call signal generation
10874283604Current source circuits with common mode noise rejection
10884282410Ringing signal generator
10894282407Telephone loop resistance detector
10904276448Electronic tone ringer
10914276447Signal processing apparatus for subscriber circuits
10924275277Subscriber line interface circuit for a telephone line
10934273964Ring and tone plant
10944272656Quasi-resistive battery feed for telephone circuits
10954272650Power supply system
10964270028Digitally activated ringing circuit for generation of AC voltages
10974268718Housing acoustical amplifier
10984267408Arrangement for applying a signal to a transmission line
10994264786A.C. Signal current transmission trunk circuit for telephone exchange systems
11004262172Ring-trip detector
11014254305Current limited subscriber line feed circuit
11024251694Tone-ringing circuits and methods for telephone sets
11034245294Power supply providing constant power output
11044243842Telephone line circuit

1980

11054241239Fluxbucking line transformer with electronic equivalent line terminating impedance
11064239941Ringing signal generator
11074239935Ringing generator
11084238644Supply circuit for a subscriber's line circuit
11094234763Feeding bridge with d.c.-compensation for both directions of the feed current
11104234762Ring trip detector circuit
11114230910Signalling and channel loop test circuits for station carrier telephone system
11124229665Programmable power supply system
11134220826Ringing generator
11144217503Current limiter
11154214131Electronic audio signalling device for telephones
11164213016Arrangement for measuring the line condition of a subscriber's line circuit by means of a measuring resistor
11174211896Subscriber's circuit with a symmetrical amplifier
11184205204Telephone loop extending apparatus
11194203012Hybrid circuit using current mirror circuits
11204203009Unbalanced/balanced converter circuits
11214201897Ringing voltage transfer circuit
11224200435Determination of glycosylated hemoglobin in blood
11234199664Telephone line circuit
11244197432Telephone subscriber's loop power control circuit
11254197431Subscriber loop feed apparatus
11264194091Line feed circuit
11274192975Supply-arrangement for a line circuit
11284192007Programmable ringing generator
11294191859Loop, dial pulse and ring trip detection circuit with capacitive shunt network
11304189764Current controlled inverter
11314189626Electronic tone ringer for telephone sets

1979

11324178485Transformerless telephone line circuit
11334176255Adjustable impedance battery feed circuit
11344174467Ringing signal generator for use in a subscriber's line circuit
11354167654Telephone line feeding circuit including a protective device
11364166930Transient free ring relay circuit for arbitrary time switching
11374166928Loop, dial pulse and ring trip detection circuit
11384164713Dual mode telephone subscriber loop current detector
11394163873Telephone solid state ringer
11404158170Line current detector
11414157459Electronic audio signalling device for telephones
11424156150Circuit for regulating a DC voltage on which a large AC voltage is superimposed
11434154989Call-signal receiver for station of telecommunication system
11444152670Signal generator, especially for ringing current in telecommunication system
11454150260Subscriber's circuit for four-wire-system local switch
11464146754Telephone signalling method and apparatus
11474145577Ringing control apparatus
11484145572Power supply control circuit for subscriber carrier telephone system
11494144408Telephone ringing extender
11504140884Electronic tone ringer
11514140882Methods and apparatus for special status indication in telephone systems
11524139740Flash-wink generating circuit
11534135062Electric network for use in a subscriber's loop
11544132864Digital measurement of the DC value in an AC signal adapted to telephone off-hook detection

1978

11554131770Common bell ringing apparatus for multiple button key telephone set
11564130735Loop extender
11574127747Voltage boost circuit for telephone systems
11584122312Loop extender
11594115660Telephone line interfacing circuit with directional transfer of ringing current and off-hook indications
11604113990Signal sending control system
11614110636Feeding bridge
11624110569Method and apparatus for monitoring the on/off-hook status of a telephone set
11634107495Electronic tone ringer
11644107476Electronic tone ringer control circuit for a telephone set
11654104488Subscriber line circuit
11664103112Telephone line circuit with differential loop current sensing and compensation
11674101871Touch-tone encoder unit for mobile radio transmitter
11684099032Loop current detector
11694096363Transmission network including flux compensation
11704088843Electronic current feed circuit
11714087647Circuit for supplying direct current to telephone station sets
11724087646Dual mode telephone subscriber loop current detector
11734086447Electronic hybrid circuit for connecting a two-wire line to switching system
11744081617Electronic ringing circuit for telephone systems
11754081609Synchronous ring detector for station carrier telephone systems
11764081130Filter-type pulse detection means
11774079208Telecommunications transmission and signalling circuits
11784076968Telephone ringer intensity control responsive to ambient noise
11794071709Line conditioning and transfer circuit

1977

11804065755Touch-Tone encoder unit for mobile radio transmitter
11814064449Direct current compensation circuit for transformers
11824064377Electronic hybrid and hybrid repeater
11834056693Voltage and current controlled converter for telephone ringing
11844056691Telephone subscriber line circuit
11854056689Telephone subscriber line circuit
11864056688Telephone range extender with gain
11874056687Decoupling control arrangement for auxiliary circuits coupled to telephone lines
11884054941Range extender with gain
11894053722Solid state two-wire/four-wire converter with common battery
11904053717Cordless telephone
11914049928Self-adjusting voice frequency repeater
11924048552Digitally regulated inverter
11934046970Ringing detector for telephone circuits
11944046969Dial pulse repeating line circuit using miniature line transformer
11954046968Integrable line circuit for use with miniature line transformer
11964046967Line circuit using miniature line transformer
11974042786Telephone ringer circuit
11984041252Transformerless two-wire/four-wire hybrid with DC sourcing capability
11994039766Electric two-to-four wire conversion circuit for use in telephone systems
12004039760Cordless telephone system
12014037117Peak shut-off electronic switch
12024035586Current supply system for terminal devices
12034034166Transmission networks for telephone system
12044031332Telephone ringer insolator
12054027235Direct current compensation circuit with current threshold detection
12064025729Telephone ringing control circuits
12074025727Balanced tone application system
12084024351Telephone line battery boost circuit
12094022980Ring trip detector
12104021617Telephone ringer isolator
12114015091Telephone ringing generators
12124012702Chime generating circuit
12134011410Communication system interface circuits
12144010329Crescendo control of signalling devices
12154007335Telephone line battery feed circuit
12164006316Code-controlled detection and function actuating system
12174004109Hybrid circuit
12184004104System for feeding in continuous current to a telephone line
12194002853Visual ring indicator
12204002838Telephone ringing control circuits
12214001708Code-controlled ringer attachment for telephones including a-peak-to-peak gain controlled amplifier
12224001516Apparatus for feeding and controlling ringing currents in telecommunication systems
12234001515Interfacing unit for telephone networks

1976

12243993880Resistive battery feed for line circuits
12253992591Telephone line battery boost circuit
12263985976Audio frequency signalling systems for telephone systems
12273978391Direct current stabilizing device
12283970805Active hybrid circuit
12293970801Dialing apparatus for a portable radio telephone
12303965447Synthetic reactor circuit
12313965307Electronic tone ringer
12323959718Direct current supply source
12333955052Subscriber unit particularly useful for time-division-multiplex system
12343953683Interrupter for telephone systems
12353946164Precise tone signal generator
12363943432Electronic feeding bridge
12373941941Relayless switching circuit for application of ringing signals
12383941939Electronic ring trip circuit
12393939311Muting circuit for subscribers telephone
12403936617Code-controlled ringer attachment for telephones
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017