| Patents for H04M 19 - Current supply arrangements for telephone systems (7,475) |
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| 06/06/2001 | CA2325673A1 Light emitting display on a portable communication device for incoming phone calls |
| 06/05/2001 | US6243399 Ring signal generator |
| 05/31/2001 | DE19955492A1 Mobile telephone handset has mechanical generator driven by handle for use in charging battery, to ensure availability for emergency use |
| 05/29/2001 | US6240177 Communication device comprising an off-hook detection circuit |
| 05/29/2001 | US6240176 Method to alert a phone operator by magnetic means of an incoming call |
| 05/29/2001 | US6239648 System and method for dissipating heat in an electric device |
| 05/23/2001 | EP1102514A1 Splitter for analog telephone signals and digital data signals |
| 05/23/2001 | DE19955282A1 Mobile phone has spoken calling message is easy to identify in crowds |
| 05/23/2001 | CN1296244A Apparatus for providing warning signal in skin contact type terminal and control method thereof |
| 05/22/2001 | US6236726 Transmit power scaling for far-end crosstalk reduction |
| 05/17/2001 | WO2001035687A1 Mobile terminal |
| 05/16/2001 | EP1100060A2 Apparatus for providing thermal alert signal and control method thereof in skin-contact type terminal |
| 05/16/2001 | EP0758518B1 Telecommunication system |
| 05/15/2001 | US6233335 Battery switching subscriber loop interface circuit |
| 05/15/2001 | US6233334 Telecommunication circuit and a telecommunication device |
| 05/15/2001 | US6233166 Uninterrupted power supply system |
| 05/10/2001 | US20010001013 External resistor and method to minimize power dissipation in DC holding circuitry for a communication system |
| 05/09/2001 | EP0968599B1 System for alerting portable communication device user of incoming call |
| 05/09/2001 | CN1294472A Mobile terminal of radio telecom system including rechargeable battery and method for preventing expansion of rechargeable battery |
| 05/08/2001 | US6229985 Communication apparatus |
| 05/08/2001 | US6229845 Bus driver with data dependent drive strength control logic |
| 05/02/2001 | EP1096773A2 Apparatus and method for reducing current during telephone connections |
| 05/02/2001 | EP1096692A1 Internal temperature regulation of subscriber terminal |
| 05/02/2001 | EP1095500A1 A telecommunication device with acoustically programmable ringtone generating means and a method for the programming thereof |
| 05/02/2001 | CN1293853A System and method for automatic PBX detection |
| 05/01/2001 | US6226536 Charger capable of controlling alerting means and radio equipment consisting of the charger and a portable radio apparatus |
| 05/01/2001 | US6226379 Telecommunications functions management system providing distinctive alerting based on caller identifier |
| 05/01/2001 | US6225897 Telephone in-use indicator system |
| 04/26/2001 | WO2001030062A1 Method and apparatus for dc feed control |
| 04/25/2001 | EP1094587A1 Mobile terminal for a wireless telecommunication system comprising a rechargeable battery and method for preventing bulging of said rechargeable battery |
| 04/25/2001 | CN1292944A PWM controller for use with open loop DC to AC converter |
| 04/24/2001 | US6222922 Loop current monitor circuitry and method for a communication system |
| 04/24/2001 | CA2226079C Telephone exchange |
| 04/19/2001 | WO2001028221A1 Method for signalling calls and communications terminal |
| 04/18/2001 | EP1093286A2 Power amplifier with feedback |
| 04/18/2001 | EP1093277A2 Maintaining an off-hook condition in a line powered DAA during a call bridge |
| 04/18/2001 | EP1093276A2 Startup procedure for international line powered DAA |
| 04/18/2001 | EP0879528B1 Telecommunications networks |
| 04/18/2001 | CN1064772C 语音活动性检测器 A voice activity detector |
| 04/17/2001 | US6218958 Integrated touch-skin notification system for wearable computing devices |
| 04/12/2001 | WO2001026354A1 An arrangement in a subscriber line interface circuit |
| 04/12/2001 | WO2000067462A3 Method of regulating power across an isolation barrier |
| 04/12/2001 | DE19946754A1 Mobile communications terminal alarm annunciator control circuit e.g. for mobile telephone |
| 04/11/2001 | CN1291038A Communication device |
| 04/10/2001 | US6216017 Separable cellular telephone and method for operating the same |
| 04/10/2001 | US6215993 Caller ID preview for mobile telephones |
| 04/10/2001 | US6215633 Active current limiter |
| 04/05/2001 | WO2001024507A1 System for downloading audible alarms for portable telephones |
| 04/04/2001 | EP1089538A1 A system to provide lifeline IP telephony service on cable access networks |
| 04/04/2001 | EP1089537A2 Line circuit apparatus for supplying power to a telephone set in telecommunication systems |
| 04/04/2001 | EP1089526A2 Telephone with sound customizable to audiological profile of user |
| 04/04/2001 | EP1088440A1 Daa circuitry and method for connecting phone lines having a dc holding |
| 04/03/2001 | USRE37125 Universal demarcation point |
| 04/03/2001 | US6212411 Power supply circuit, telecommunication device and method for multiple DC slope power management |
| 04/03/2001 | US6212274 Line powered modem |
| 04/03/2001 | US6212272 Subscriber line interface circuit (SLIC) simulator |
| 03/29/2001 | WO2001022745A2 Device for providing services and transmitting data in the home |
| 03/29/2001 | WO2001022716A1 An arrangement and a method relating to power supply in a communications network |
| 03/29/2001 | DE10041521A1 Power supply procedure for digital subscriber line, involves operating telephone circuit by the power extractor from subscriber's line, during commercial power supply failure |
| 03/28/2001 | CN1289504A Method for compensating current ariables of a subscriber circuit which have been modified by disturbance variables |
| 03/28/2001 | CN1289217A Telephone terminal device |
| 03/27/2001 | US6208670 Digital carrier system for rural telephone and data applications |
| 03/27/2001 | US6208237 Electro-mechanical and acoustic transducer for portable terminal unit |
| 03/27/2001 | US6208118 Far-distance remotely controllable rectifier with back-up battery |
| 03/22/2001 | DE19938123A1 Verfahren zum Verwalten der von einem Kommunikationsnetz über eine Leitung zu einer Netzabschlusseinrichtung übertragbaren Energie Method for managing a communication network via a cable to a network termination transferable energy |
| 03/21/2001 | EP1084567A1 Method and apparatus for deriving power from a clock signal coupled through a transformer |
| 03/21/2001 | EP1084566A1 Method and arrangement for choosing supply voltage |
| 03/15/2001 | WO2001019069A1 Method and arrangement for shortening the recovery time of a line driver |
| 03/15/2001 | CA2383761A1 Method and arrangement for shortening the recovery time of a line driver |
| 03/14/2001 | EP1083729A2 Subscriber line interface circuit |
| 03/14/2001 | EP1083665A2 Power consumption control method and apparatus for a communication system subscriber unit |
| 03/14/2001 | EP1083664A2 Power consumption control method and apparatus for a communication system subscriber unit |
| 03/14/2001 | CN1287442A Subscriber line interface circuit |
| 03/14/2001 | CN1063305C Secondary power tube driving circuit for medium & large power ringing current converter |
| 03/13/2001 | US6201865 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants |
| 03/08/2001 | WO2001017220A1 Telephone system operating method having ring or tip tone function using cm song |
| 03/06/2001 | US6198816 Capacitively coupled ring detector with power provided across isolation barrier |
| 03/01/2001 | WO2001015410A2 Telephone terminal apparatus and communication method |
| 02/28/2001 | EP1079592A2 Ringing signal generator |
| 02/28/2001 | EP1079584A2 Cover for an electronic device |
| 02/28/2001 | EP1079530A2 Power consumption control method and apparatus for a communication system subscriber unit |
| 02/28/2001 | EP1078444A1 Pwm controller for use with open loop dc to ac converter |
| 02/28/2001 | CN1285711A Casing of electric appliances |
| 02/28/2001 | CN1285680A Method and system for long distance power supplying |
| 02/28/2001 | CA2316074A1 Telephone with sound customizable to audiological profile of user |
| 02/27/2001 | US6195572 Wireless communications assembly with variable audio characteristics based on ambient acoustic environment |
| 02/27/2001 | CA2309466A1 System and method for automatically muting restricted electronic devices in restricted areas |
| 02/22/2001 | WO2001013622A2 Continuity of voice carried over dsl during power failure |
| 02/22/2001 | WO2001013621A2 Method for managing the power which can be transmitted from a communications network to a network termination device via a line |
| 02/22/2001 | WO2001013620A2 Method for managing the power which can be transmitted from a communications network to a network termination device via a line |
| 02/22/2001 | WO2001013618A1 Voice over digital subscriber line call redirection for 'lifeline' service |
| 02/20/2001 | US6191684 Remote supply circuitry |
| 02/20/2001 | US6190227 Incoming call reporting toy |
| 02/13/2001 | US6188916 Communication system of portable communication terminal, incoming call control system of portable communication terminal and incoming call notifying device of portable communication terminal |
| 02/13/2001 | US6188909 Communication network terminal supporting a plurality of applications |
| 02/13/2001 | US6188567 Power distribution apparatus and method |
| 02/08/2001 | WO2001056014A1 Portable telephone |
| 02/08/2001 | WO2000036857A8 Method for implementing a sound message send/receive service in a telecommunication network |
| 02/07/2001 | EP1074156A1 Method and system for providing cellular communications services |
| 02/06/2001 | US6184742 Current distribution circuit having an additional parallel DC-current sinking branch |