СПИСОК патентов США - подгруппа МПК16 H04M19/02
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| № п/п | Номер патента | Название патента | |||
2016 | |||||
| 1 | 9374452 | Apparatus and method for detection of off-hook phone in reverse power feeding architecture | |||
| 2 | 9369593 | VOIP terminal and ringing parameter setting method therefor | |||
| 3 | 9325859 | Method for optimising electrical consumption of a residential gateway | |||
2015 | |||||
| 4 | 9100729 | Method for handling a telecommunications connection, telecommunications arrangement, switching device and network coupling device | |||
2012 | |||||
| 5 | 8249242 | Secure call DTMF signaling | |||
2006 | |||||
| 6 | 7010120 | Method for adjusting a ringing signal current in a subscriber line and circuit arrangement | |||
2005 | |||||
| 7 | 6947554 | Least mean power consumption in telecommunications systems | |||
| 8 | 6944286 | Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones | |||
| 9 | 6940970 | Ring boost circuit to extend ringing range of telephone SLICs | |||
| 10 | 6920209 | Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access | |||
| 11 | 6917681 | Peak power management and active decoupling arrangement for span-powered remote terminal access platforms | |||
| 12 | 6873702 | Telephone subscriber system | |||
2004 | |||||
| 13 | 6775531 | Subscriber terminal temperature regulation | |||
| 14 | 6741702 | Device for connecting a subscriber line to a high frequency link and to a low frequency link | |||
| 15 | 6735305 | Detection of low tip/ring currents in a line powered DAA | |||
| 16 | 6731738 | Call tones in communication networks | |||
| 17 | 6728362 | Continuity testing with call tone messaging in communication networks | |||
2003 | |||||
| 18 | 6658105 | Method to reduce distortion of a digital data signal by a pots ringing signal, and related telephone ringing signal generator | |||
| 19 | 6640318 | Continuity testing in communication networks | |||
| 20 | 6611583 | Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access | |||
| 21 | 6587560 | Low voltage circuits powered by the phone line | |||
| 22 | 6577722 | Call waiting response status | |||
| 23 | 6567521 | Subscriber loop interface circuitry having bifurcated common mode control | |||
| 24 | 6560323 | Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access | |||
2002 | |||||
| 25 | 6480602 | Ring-detect interface circuitry and method for a communication system | |||
| 26 | 6463297 | Device and method for automatically disconnecting a call in a mobile radio communication terminal | |||
| 27 | 6456712 | Separation of ring detection functions across isolation barrier for minimum power | |||
| 28 | 6442271 | Digital isolation system with low power mode | |||
| 29 | 6442213 | Digital isolation system with hybrid circuit in ADC calibration loop | |||
| 30 | 6434236 | PC server telecommunications power system | |||
| 31 | 6408034 | Framed delta sigma data with unlikely delta sigma data patterns | |||
| 32 | 6389134 | Call progress monitor circuitry and method for a communication system | |||
| 33 | 6385235 | Direct digital access arrangement circuitry and method for connecting to phone lines | |||
| 34 | 6359983 | Digital isolation system with data scrambling | |||
| 35 | 6351528 | Integrated ringer for short telephone lines | |||
2001 | |||||
| 36 | 6333664 | Low operating power, high voltage ringing switch circuit | |||
| 37 | 6307891 | Method and apparatus for freezing a communication link during a disruptive event | |||
| 38 | 6298133 | Telephone line interface architecture using ringer inputs for caller ID data | |||
| 39 | 6289070 | Digital isolation system with ADC offset calibration including coarse offset | |||
| 40 | 6278778 | System and method of power limiting call processing in telecommunications equipment | |||
| 41 | 6263074 | User programmable station set bass and treble control | |||
| 42 | 6252784 | Power amplifier with feedback | |||
| 43 | 6243399 | Ring signal generator | |||
| 44 | 6222922 | Loop current monitor circuitry and method for a communication system | |||
| 45 | 6198816 | Capacitively coupled ring detector with power provided across isolation barrier | |||
| 46 | 6191684 | Remote supply circuitry | |||
2000 | |||||
| 47 | 6167135 | Method and apparatus for generating a ringing signal | |||
| 48 | 6167134 | External resistor and method to minimize power dissipation in DC holding circuitry for a communication system | |||
| 49 | 6167132 | Analog successive approximation (SAR) analog-to-digital converter (ADC) | |||
| 50 | 6160885 | Caller ID circuit powered through hookswitch devices | |||
| 51 | 6144326 | Digital isolation system with ADC offset calibration | |||
| 52 | 6115469 | Telephone line ring signal and DC power generator | |||
| 53 | 6104794 | Architecture for minimum loop current during ringing and caller ID | |||
| 54 | 6049471 | Controller for pulse width modulation circuit using AC sine wave from DC input signal | |||
| 55 | 6026159 | Integrated ringer for short telephone lines | |||
1999 | |||||
| 56 | 5978471 | Method and device for detecting a ringtrip | |||
| 57 | 5970139 | T1 channel bank control process and apparatus | |||
| 58 | 5960075 | Switchmode power converters for telephone subscriber line interface circuits | |||
| 59 | 5943418 | Ring-trip circuit | |||
| 60 | 5926533 | Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access | |||
| 61 | 5905786 | Console and extension telephone system | |||
| 62 | 5903448 | Four quadrant flyback converter, method of operation thereof and power plant employing the same | |||
| 63 | 5881148 | T1 channel bank control process and apparatus | |||
| 64 | 5872842 | Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit | |||
| 65 | 5870466 | T1 channel bank control process and apparatus | |||
1998 | |||||
| 66 | 5848149 | Subscriber line interface and power circuit | |||
| 67 | 5838788 | Telephone ringing signal generator | |||
| 68 | 5828728 | Telecommunications network | |||
| 69 | 5828558 | PWN controller use with open loop flyback type DC to AC converter | |||
| 70 | 5812658 | Method and circuit for failsafe switch-hook detection during fault in a telephone system | |||
| 71 | 5809131 | Ringer circuit for generating sine wave | |||
| 72 | 5790654 | Digitally controlled ring signal generator | |||
| 73 | 5768368 | T1 channel bank control process and apparatus | |||
| 74 | 5764755 | Ring-signal generation in a SLIC | |||
| 75 | 5740241 | T1 channel bank control process and apparatus | |||
| 76 | 5734712 | Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing | |||
| 77 | 5723996 | Leadframe for plastic-encapsulated semiconductor device, semiconductordevice using the same, and manufacturing method for the leadframe | |||
| 78 | 5712910 | Ring trip circuit having a simple trip detecting circuit of a high response speed | |||
1997 | |||||
| 79 | 5694465 | Integrated ringer for short telephone lines | |||
| 80 | 5684874 | Ringtrip judging circuit | |||
| 81 | 5671272 | Current mode ring trip detector | |||
| 82 | 5666406 | Hazard prevention for telephone line interface circuits | |||
| 83 | 5666355 | Power consumption control method and apparatus for a communication system subscriber unit | |||
| 84 | 5663878 | Apparatus and method for generating a low frequency AC signal | |||
| 85 | 5659608 | Line feed circuit with logic level controlled ringing | |||
| 86 | 5655013 | Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access | |||
| 87 | 5636274 | Switch controller and method | |||
| 88 | 5602911 | System and method for eliminating bell tap on analog telephones | |||
| 89 | 5600713 | On-board ring signal generator | |||
1996 | |||||
| 90 | 5579386 | Telephone network alerting cadence control system | |||
| 91 | 5557658 | Communications marketing system | |||
| 92 | 5553132 | Method and an arrangement for generating a ringing signal | |||
| 93 | 5539805 | Power supply system including ringing voltage reset under low input voltage conditions | |||
| 94 | 5535273 | Circuitry for superimposing small, low energy signals and large, essentially higher energy signals | |||
| 95 | 5530931 | Method and apparatus for providing a look ahead feature for enhanced call forwarding in a telecommunications system | |||
| 96 | 5528682 | Double duty capacitor circuit and method | |||
| 97 | 5521964 | Visual message waiting indication in a telephone voice message system | |||
| 98 | 5517565 | Integrated ringer relay circuit and method | |||
| 99 | 5515434 | Impedance setting circuit for a SLIC | |||
| 100 | 5515417 | Ground key detector for a SLIC | |||
| 101 | 5511118 | Method of providing d.c. feed to a telephone line | |||
| 102 | 5491746 | Unique ringing on a prime telephone | |||
| 103 | 5490054 | Ringing generator and method for converting DC to AC having continuously adjustable amplitude | |||
| 104 | 5483592 | Ringer unit driving system in a subscriber transmission system | |||
1995 | |||||
| 105 | 5442692 | Telecommunication system having a capability of changing the alerting tone | |||
| 106 | 5440262 | High-efficiency Ring/MWL generator | |||
| 107 | 5436964 | Programmable call progress tones for a switching system | |||
| 108 | 5428670 | Communications marketing system | |||
| 109 | 5426695 | Ringing signal control circuit capable of suppressing surge voltage | |||
| 110 | 5406623 | Method and apparatus for ringing telephone stations | |||
| 111 | 5402484 | Telephone circuit assembly | |||
| 112 | 5402482 | Ring trip deciding circuit | |||
| 113 | 5402480 | Call signal generating circuit | |||
| 114 | 5396548 | Communication system utilizing information received during a silent interval between ringing signals | |||
1994 | |||||
| 115 | 5369690 | Telephone call detecting circuit and a method of remotely accessing and testing a telephone | |||
| 116 | 5367567 | Subscriber apparatus with ringer generator for sending ringer signal to subscriber line | |||
| 117 | 5363431 | Visual message waiting indication in a telephone voice message system | |||
| 118 | 5347565 | Order wire device having function for reducing noise in communication system having a plurality of order wire devices | |||
| 119 | 5341108 | Amplifier biasing circuit | |||
| 120 | 5335271 | Ring trip detection circuit | |||
| 121 | 5323461 | Telephone line interface circuit with voltage switching | |||
| 122 | 5321740 | Telephone marketing system | |||
| 123 | 5321596 | DC/DC/AC power supply for a subscriber interphase unit | |||
| 124 | 5307407 | 20 Hz ring generator using high frequency PWM control | |||
| 125 | 5295185 | Ringing signal generation circuit with protection against overvoltage | |||
| 126 | 5293420 | Ring trip circuit | |||
1993 | |||||
| 127 | 5260996 | Current limited electronic ringing generator | |||
| 128 | 5260992 | Key telephone system with reduction of delay of ring tone generation at telephone set | |||
| 129 | 5247573 | Telecommunications system comprising a circuit arrangement for at least one subscriber station | |||
| 130 | 5230018 | Communication system for activating an optical display in a communication terminal of a communication switching station | |||
| 131 | 5228081 | Ringing signal control circuit for an enhanced subscriber line interface | |||
| 132 | 5216708 | Calling signal controller | |||
| 133 | 5195128 | Communication system, particularly a telephone communication system | |||
| 134 | 5191507 | Polarity inverting circuit | |||
| 135 | 5185738 | Fiberoptic telephone systems | |||
| 136 | 5180987 | DC-to-AC symmetrical sine wave generator | |||
1992 | |||||
| 137 | 5172408 | Speakerphone state-controlled alerting arrangement | |||
| 138 | 5103387 | High voltage converter | |||
1991 | |||||
| 139 | 5073922 | Communication terminal apparatus | |||
| 140 | 5056135 | Method of automatic equalized distribution of ring loads for telephone exchange system | |||
| 141 | 5040209 | Telephone ringing monitoring and control system | |||
| 142 | 5027391 | Call management system | |||
| 143 | 5014305 | Line interface circuit | |||
| 144 | 5001748 | Ringing signal generator | |||
| 145 | 4995111 | Ring trip circuit for subscriber telephone | |||
| 146 | 4995075 | Apparatus and method for encoding telephone ringing signals | |||
1990 | |||||
| 147 | 4972466 | Digital composite tone alerting | |||
| 148 | 4969186 | Telephone message waiting system and apparatus | |||
| 149 | 4965692 | Overload detector and protection circuit | |||
| 150 | 4964158 | Power supply for telephone exchange | |||
| 151 | 4962527 | Series ringing signal generator | |||
| 152 | 4962520 | Composite ringing and coin control voltage detector and method | |||
| 153 | 4959853 | Frequency responsive selective ringing circuit | |||
| 154 | 4955053 | Solid state ringing switch | |||
| 155 | 4926467 | Line card with distributed signaling voltages | |||
| 156 | 4924511 | Ring signal generator for generating ring signals of different frequencies and power levels in response to user selection | |||
| 157 | 4916734 | Apparatus for separating dc current and ac current components of a composite signal | |||
| 158 | 4908857 | Isolated drive circuit | |||
| 159 | 4908854 | Apparatus for connecting and disconnecting a ringing signal to a called subscriber | |||
| 160 | 4896351 | Apparatus for separating dc current and ac current components of a composite signal | |||
1989 | |||||
| 161 | 4866587 | Electronic ringing signal generator | |||
| 162 | 4860287 | Network having a synchronizer for synchronization between a primary and a remote station | |||
| 163 | 4847896 | Monolithically integratable telephone circuit for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing | |||
| 164 | 4837818 | Telecommunication line circuit | |||
| 165 | 4827503 | Integrated ringing circuit and a ring trip circuit for the same | |||
| 166 | 4821315 | Electronic contacts and associated devices | |||
| 167 | 4821314 | Message and ringing signaling device for a telephone installation | |||
| 168 | 4809258 | Circuit arrangement for the indication of loop closure during the ringing condition | |||
| 169 | 4797917 | Monolithically integratable telephone circuit for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing | |||
1988 | |||||
| 170 | 4782518 | Apparatus for converting distinctive ring to selective ring in telephone lines | |||
| 171 | 4748659 | Calling signal transmission apparatus | |||
| 172 | 4737989 | Ringing circuit | |||
| 173 | 4736412 | Method of and circuit arrangement for evaluating the output signals of current flow detectors in telecommunication facilities | |||
| 174 | 4734936 | Ringing signal sending-out circuit | |||
| 175 | 4734933 | Telephone line status circuit | |||
| 176 | 4731828 | Ring trip detection in telecommunications exchanges | |||
| 177 | 4731827 | Interswitch line circuit | |||
| 178 | 4726060 | Line circuit for driving a ringer and a service indicating lamp in a telephone set | |||
1987 | |||||
| 179 | 4712233 | Monolithic telephone subscriber line interface circuit | |||
| 180 | 4703500 | Power amplifier | |||
| 181 | 4686700 | Telephone off-hook detector circuit | |||
| 182 | 4677664 | Method and apparatus for an improved ring trip detection telephone circuit | |||
| 183 | 4656659 | Programmable ring signal generator | |||
| 184 | 4652701 | Ringing application circuit | |||
| 185 | 4648019 | High efficiency ringing generator | |||
| 186 | 4645881 | DC level trip detector | |||
| 187 | 4644476 | Dialing tone generation | |||
1986 | |||||
| 188 | 4631361 | Programmable ring generator | |||
| 189 | 4622439 | Detection of ground or loop start configuration in telephone loop signalling circuit | |||
| 190 | 4611097 | Sine wave ring generator | |||
| 191 | 4609782 | Solid state signal insertion circuit and method for use in a telephony system or the like | |||
| 192 | 4605824 | Circuit arrangement for telecommunication exchange systems, particularly telephone exchange systems with switch facilities for emitting signals | |||
| 193 | 4584576 | Ringing signal generator | |||
| 194 | 4578541 | Telephone line interface circuit | |||
1985 | |||||
| 195 | 4562308 | Subscriber connection circuit comprising feed resistors which can be bridged in low-ohmic fashion and an indication circuit which effects different indications | |||
| 196 | 4558183 | Opto-coupler interfacing circuit | |||
| 197 | 4555595 | Sampled port data switching system employing interactive processors | |||
| 198 | 4540853 | Apparatus for detecting a loop during ringing | |||
| 199 | 4539438 | Active impedance transformer assisted line feed circuit with supervision filtering | |||
| 200 | 4535303 | Driver circuit | |||
| 201 | 4533792 | Circuit for switching between ring signal and message waiting signal without bell tap | |||
| 202 | 4528425 | Method 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 | |||
| 203 | 4524246 | SLIC II--common-mode current rejection | |||
| 204 | 4524245 | Ring trip detection system | |||
| 205 | 4500844 | Ringing signal generator employing delta-modulation power amplification techniques | |||
| 206 | 4492821 | Subscriber connection circuit | |||
1984 | |||||
| 207 | 4489222 | Telephone line interface | |||
| 208 | 4479034 | Arrangement of interactive processors for control of ports | |||
| 209 | 4477697 | Method and circuitry for encoding telephone ringing signals | |||
| 210 | 4473719 | Switchhook status detector | |||
| 211 | 4471169 | Arrangement of interactive telephone switching processors and associated port data storage means | |||
| 212 | 4455456 | Digital supervisory circuit for a telephone system | |||
| 213 | 4451702 | Arrangement of interactive telephone switching processors for performing timing analyses of port events | |||
| 214 | 4447675 | Ring-trip detector | |||
| 215 | 4447673 | Ring trip apparatus for a line circuit connected to DCO switch | |||
| 216 | 4443669 | Subscriber connection circuit | |||
| 217 | 4443663 | Filtering of port data in a switching system employing interactive processors | |||
| 218 | 4436960 | Telephone ringing signal generator | |||
| 219 | 4435803 | Analog subscriber/trunk module with shared ringing source and ring-trip | |||
| 220 | 4429185 | Voltage detector circuit | |||
1983 | |||||
| 221 | 4415961 | Telephone ringing signal generator | |||
| 222 | 4409438 | Ringing control circuit in a telephone switching system | |||
| 223 | 4406004 | Ring scheduling apparatus for a digital multiplexed telecommunication system | |||
| 224 | 4396805 | Ring trip detector for a subscriber line interface circuit | |||
| 225 | 4385385 | Circuit for monitoring a digital signal generator | |||
| 226 | 4370526 | Arrangement for applying a ringing voltage to a subscriber's line | |||
1982 | |||||
| 227 | 4362908 | Circuit arrangement for emitting ringing signals in a telephone system | |||
| 228 | 4356355 | Apparatus for detecting the closure of a subscriber's line during ringing | |||
| 229 | 4355209 | Programmable line circuit | |||
| 230 | 4355206 | Ringing control device | |||
| 231 | 4354062 | Communication system signaling circuit | |||
| 232 | 4349703 | Programmable ring signal generator | |||
| 233 | 4345169 | Zero crossing detector | |||
| 234 | 4341928 | Ringing signal supply | |||
| 235 | 4340785 | Ringing signal supply | |||
| 236 | 4321430 | Subscriber's connecting network comprising a symmetrical power amplifier for feeding a subscriber's line | |||
| 237 | 4320260 | Circuit arrangement for determining the connection condition of a subscriber line in a telecommunications network | |||
| 238 | 4320258 | Arrangement for requesting service for called telephone subscribers | |||
| 239 | 4310733 | Arrangement for applying signals to a telephone line | |||
| 240 | 4310728 | Ringing device for a private automatic branch exchange | |||
1981 | |||||
| 241 | 4306118 | Telephone set ringing current injection device | |||
| 242 | 4292473 | Loop supervision circuit | |||
| 243 | 4284854 | Universal signal generator for generating telephone system high level signals | |||
| 244 | 4284853 | Telecommunication subscriber line access circuit with ground key indication and a device for call signal generation | |||
| 245 | 4282410 | Ringing signal generator | |||
| 246 | 4276447 | Signal processing apparatus for subscriber circuits | |||
| 247 | 4273964 | Ring and tone plant | |||
| 248 | 4270028 | Digitally activated ringing circuit for generation of AC voltages | |||
| 249 | 4264786 | A.C. Signal current transmission trunk circuit for telephone exchange systems | |||
| 250 | 4262172 | Ring-trip detector | |||
1980 | |||||
| 251 | 4239941 | Ringing signal generator | |||
| 252 | 4234762 | Ring trip detector circuit | |||
| 253 | 4230910 | Signalling and channel loop test circuits for station carrier telephone system | |||
| 254 | 4220826 | Ringing generator | |||
| 255 | 4211896 | Subscriber's circuit with a symmetrical amplifier | |||
| 256 | 4201897 | Ringing voltage transfer circuit | |||
| 257 | 4199664 | Telephone line circuit | |||
| 258 | 4192007 | Programmable ringing generator | |||
| 259 | 4191859 | Loop, dial pulse and ring trip detection circuit with capacitive shunt network | |||
| 260 | 4189764 | Current controlled inverter | |||
1979 | |||||
| 261 | 4174467 | Ringing signal generator for use in a subscriber's line circuit | |||
| 262 | 4166930 | Transient free ring relay circuit for arbitrary time switching | |||
| 263 | 4166928 | Loop, dial pulse and ring trip detection circuit | |||
| 264 | 4164713 | Dual mode telephone subscriber loop current detector | |||
| 265 | 4158170 | Line current detector | |||
| 266 | 4156150 | Circuit for regulating a DC voltage on which a large AC voltage is superimposed | |||
| 267 | 4152670 | Signal generator, especially for ringing current in telecommunication system | |||
| 268 | 4150260 | Subscriber's circuit for four-wire-system local switch | |||
| 269 | 4145577 | Ringing control apparatus | |||
| 270 | 4132864 | Digital measurement of the DC value in an AC signal adapted to telephone off-hook detection | |||
1978 | |||||
| 271 | 4113990 | Signal sending control system | |||
| 272 | 4110569 | Method and apparatus for monitoring the on/off-hook status of a telephone set | |||
| 273 | 4104488 | Subscriber line circuit | |||
| 274 | 4099032 | Loop current detector | |||
| 275 | 4087646 | Dual mode telephone subscriber loop current detector | |||
| 276 | 4071709 | Line conditioning and transfer circuit | |||
1977 | |||||
| 277 | 4056693 | Voltage and current controlled converter for telephone ringing | |||
| 278 | 4025727 | Balanced tone application system | |||
| 279 | 4022980 | Ring trip detector | |||
| 280 | 4021617 | Telephone ringer isolator | |||
| 281 | 4012702 | Chime generating circuit | |||
| 282 | 4001516 | Apparatus for feeding and controlling ringing currents in telecommunication systems | |||
1976 | |||||
| 283 | 3946164 | Precise tone signal generator | |||
| 284 | 3941941 | Relayless switching circuit for application of ringing signals | |||
| 285 | 3941939 | Electronic ring trip circuit | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||