| Patents for H04M 19 - Current supply arrangements for telephone systems (7,475) |
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| 02/01/2001 | WO2001008388A1 Reduced power line driver |
| 01/31/2001 | CN1282187A Power supply method and device for mobile telephone |
| 01/31/2001 | CN1061479C Electronic device having internal charge regulator controlled by charge current |
| 01/30/2001 | US6181237 Method and apparatus for generating pressure based alerting signals |
| 01/26/2001 | CA2278909A1 Reduced power line driver |
| 01/23/2001 | US6178230 System and method for identifying a callee of an incoming telephone call |
| 01/23/2001 | US6176710 Battery feed connector for network power controllers |
| 01/18/2001 | DE10032233A1 Verbessertes Mobiltelefon Improved mobile phone |
| 01/17/2001 | EP1069754A2 Communication interface apparatus |
| 01/17/2001 | EP1069753A2 Communication terminal |
| 01/16/2001 | US6175721 Communication device having incoming indicators |
| 01/16/2001 | CA2250958C Method and apparatus for reducing power dissipation in dc termination circuit |
| 01/10/2001 | CN2414561Y Cool light chip calling-number indicator for mobile telephone and the like teleccommunication equipment |
| 01/03/2001 | CN1278685A Radio communication apparatus integrated with personal computer card |
| 01/02/2001 | US6169883 Remote test of a subscriber connection in a system implementing a wireless subscriber connection |
| 12/28/2000 | WO2000079770A1 User customizable announcement |
| 12/28/2000 | WO2000056038A3 Handset for telecommunications terminals |
| 12/27/2000 | CN1059999C Bell flow converter |
| 12/26/2000 | US6167288 Folded-type portable telephone set |
| 12/26/2000 | US6167278 Combination cordless-cellular telephone system |
| 12/26/2000 | US6167135 Method and apparatus for generating a ringing signal |
| 12/26/2000 | US6167134 External resistor and method to minimize power dissipation in DC holding circuitry for a communication system |
| 12/26/2000 | US6167132 Analog successive approximation (SAR) analog-to-digital converter (ADC) |
| 12/26/2000 | US6166621 Method and apparatus for displaying a message which has been received |
| 12/24/2000 | CA2305989A1 Method and apparatus for supplying power to a twisted pair wire on a telecommunications modem transmission link |
| 12/21/2000 | WO2000078030A1 Telephone system and method of operating same |
| 12/21/2000 | DE19927292A1 Telefonanordnung und Verfahren zum Betrieb einer solchen Telephone arrangement and method for operating such a |
| 12/20/2000 | EP1061717A1 Mobile telephone |
| 12/20/2000 | CN1277691A Apparatus and method for configuring settings of a portable intelligent communications device |
| 12/14/2000 | WO2000076197A2 Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones |
| 12/14/2000 | WO2000076180A1 Adaptable line driver interface for digital telephone systems |
| 12/13/2000 | EP1058970A1 2-way radio with silent annunciation |
| 12/13/2000 | CN1276948A Power conservation for POTS and modulated data transmission |
| 12/12/2000 | US6160887 Telephone loop-current regulator |
| 12/12/2000 | US6160885 Caller ID circuit powered through hookswitch devices |
| 12/12/2000 | US6160489 Wireless communication device adapted to generate a plurality of distinctive tactile alert patterns |
| 12/07/2000 | WO2000074328A2 Slic architecture and interfaces |
| 12/05/2000 | US6157716 Power feed circuit providing both on-hook and off-hook power for telephone subscriber loop |
| 11/30/2000 | WO2000072554A1 Portable telephone |
| 11/30/2000 | CA2374332A1 Portable telephone |
| 11/28/2000 | US6154666 Wireless communications assembly with variable audio characteristics based on ambient acoustic environment |
| 11/23/2000 | WO2000070862A1 Telephone-line based power supply system |
| 11/23/2000 | WO2000070779A1 Combined-use assembly of mobile telephone and audio |
| 11/23/2000 | WO2000070732A1 Telephone-line based power supply system |
| 11/22/2000 | EP1053632A2 Subscriber line interface circuit |
| 11/22/2000 | EP1053621A1 System and method for automatic pbx detection |
| 11/15/2000 | EP1051828A2 Method for compensating current variables of a subscriber circuit which have been modified by disturbance variables |
| 11/15/2000 | CN2406429Y Telephone telecontrolled power-supply |
| 11/15/2000 | CN1273541A Electrical/mechanical/soundconverter and apparatus of electrical/mechaical/sound conversion device using the converter |
| 11/14/2000 | US6148180 Radio communication apparatus |
| 11/14/2000 | US6148076 Method and an arrangement for controlling the operating mode of a subscriber line interface circuit |
| 11/09/2000 | WO2000067463A1 Method of transferring power across an isolation barrier |
| 11/09/2000 | WO2000067462A2 Method of regulating power across an isolation barrier |
| 11/09/2000 | DE10004814A1 Power supply transformer for telephones, has bobbin which is divided into winding frames by flange such that sufficient distance and insulation is provided between input and output windings |
| 11/07/2000 | US6144737 Trunk interface circuit having function of battery feed to central office |
| 11/07/2000 | US6144736 T1 channel bank control and apparatus |
| 11/07/2000 | US6144326 Digital isolation system with ADC offset calibration |
| 11/02/2000 | WO2000065808A1 Subscriber line interface circuitry |
| 11/02/2000 | WO2000065805A1 Miniature piezo-ceramic vibrators for wireless communication devices and cellular telephones |
| 11/02/2000 | EP1049315A1 Method for ringing control in a digital network subscriber termination |
| 11/02/2000 | DE10009488A1 Loss prevention warning device for mobile telephone alerts user if distance between high frequency transmitter and receiver exceeds certain value |
| 11/01/2000 | CN1272292A Bell sound selecting method for cellular phone using audio response system |
| 11/01/2000 | CN1058119C Constant-current and constant-voltage feeder apparatus |
| 10/31/2000 | US6141416 Analog telephone subscriber terminal apparatus |
| 10/25/2000 | EP1047258A2 Volume control for an alert generator |
| 10/25/2000 | CN1271229A Volume control of alarm generator |
| 10/24/2000 | US6137189 Line circuit apparatus for supplying power to a telephone set in telecommunication systems |
| 10/19/2000 | WO2000062524A1 Ring back tone/busy tone selection-type mobile telephone |
| 10/19/2000 | CA2303719A1 Volume control for an alert generator |
| 10/18/2000 | EP1044552A1 Telecommunications terminal card |
| 10/18/2000 | CN1270735A Method and apparatus for controlling a telephone ring signal |
| 10/17/2000 | US6134323 Telecommunications system, an automatic branch exchange, a line card, a supply circuit for a telecommunications line, and a telecommunications subscriber device |
| 10/17/2000 | US6134320 Telecommunications functions management system providing selective alerting based on caller identifier |
| 10/17/2000 | US6134310 Telecommunications functions management system for managing outgoing calls from a plurality of telephone terminals |
| 10/17/2000 | US6134241 Telecommunication system |
| 10/17/2000 | CA2243856C Telecommunications networks |
| 10/17/2000 | CA2036521C Intrinsically safe telephone |
| 10/12/2000 | WO2000036857A3 Method for implementing a sound message send/receive service in a telecommunication network |
| 10/12/2000 | DE10013387A1 Call ring and speech signals providing device for workstation; receives data to audio card for changing it into an analog signal with first and second analog channels |
| 10/11/2000 | EP1042908A1 Method for connecting a remotely powered peripheral unit |
| 10/04/2000 | EP1041834A1 Telecommunications terminal with operator managed short message storage and corresponding method |
| 10/04/2000 | CN1057183C Slow starting of ringing current generator, and overcurrent protection circuit |
| 10/03/2000 | US6128104 Communication terminal with an energy saving capability |
| 10/03/2000 | US6127933 Portable communication terminal |
| 10/03/2000 | CA2149517C Network termination unit |
| 09/26/2000 | US6125264 Telephone apparatus |
| 09/21/2000 | WO2000056038A2 Handset for telecommunications terminals |
| 09/21/2000 | WO2000056037A1 Handset for telecommunications terminals |
| 09/20/2000 | EP1037445A2 Handset for telecommunication terminals |
| 09/20/2000 | EP1037444A2 Handset for telecommunication terminals |
| 09/19/2000 | US6122367 Subscriber line interface circuit |
| 09/19/2000 | US6122353 Method and apparatus for detecting a telephone CPE alerting signal |
| 09/19/2000 | US6121754 Method for displaying a "low battery" state in electrical equipment with electrical energy stores and electrical equipment with electrical energy stores with means for displaying a "low battery" state |
| 09/13/2000 | EP1035748A1 Switching a mobile terminal to a silent ring mode |
| 09/13/2000 | EP1035747A1 Base station for protecting a predetermined area by means of a separate protection system |
| 09/12/2000 | US6119090 Subscriber line interface circuit which automatically adjusts the signal headroom on a telephone line and a method of doing the same |
| 09/12/2000 | US6119022 System for alerting portable communication device user of incoming call |
| 09/12/2000 | US6116961 Jack assembly |
| 09/08/2000 | WO2000052909A1 Telephone |
| 09/06/2000 | CN2395476Y Feeding unit for user interface of program control exchanger |