Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 19 - Current supply arrangements for telephone systems
Patents for H04M 19 - Current supply arrangements for telephone systems (7,475)
09/2000
09/05/2000US6115469 Telephone line ring signal and DC power generator
09/05/2000CA2232221C Series equipment with dc line hold transfer
08/2000
08/31/2000WO2000051317A1 Caller id preview for mobile telephones
08/31/2000WO2000051256A1 Bus driver with data dependent drive strength control logic
08/31/2000CA2363959A1 Bus driver with data dependent drive strength control logic
08/29/2000CA2035099C Method and configuration for forming a line termination of a telephone line
08/24/2000WO2000049791A1 Telecommunication terminal
08/23/2000EP1029289A1 Apparatus and method for configuring settings of a portable intelligent communications device during a meeting
08/23/2000EP0865702B1 Method of detecting operating states of an electrical apparatus and electrical apparatus for detecting apparatus-specific operating states
08/22/2000US6108568 Cordless telephony device rechargeable in any position
08/22/2000US6108532 Incoming call control based on the moving speed of a radio communications apparatus
08/17/2000DE19903857A1 Kommunikations-Endgerät und dazugehöriges Verfahren zum Editieren von Ruftonmelodien Communication terminal and associated method for editing ringtone melodies
08/15/2000US6104794 Architecture for minimum loop current during ringing and caller ID
08/10/2000WO2000046976A1 Communications terminal and corresponding method for modifying ringing tone melodies
08/10/2000WO2000018107A3 System and method for identifying a calling party
08/09/2000EP1026874A1 Arrangement and method to feed in power to a plurality of circuits or telecommunication lines
08/09/2000EP1025690A2 Subscriber line interface circuit
08/03/2000WO2000045570A1 A portable telecommunication apparatus for multiple audio accessories
08/03/2000WO2000045567A1 Telephone and telephone system
08/03/2000CA2261010A1 Method and apparatus for power distribution in telephone lines
08/02/2000EP1023757A1 Method and system for distribution of stand-by electric power
08/02/2000EP0533755B2 Communications-transmission system
07/2000
07/27/2000WO2000043963A1 Alert signal unit for an electronic device to compensate for the influence of an environment
07/27/2000DE19858761C1 Circuit layout for electronically generating a call impedance in telephone appliances taps call alternating voltage between first and second input terminals while regulating impedance with a programmable digital filter.
07/26/2000CN1261499A Mobile radiotelephone method and system and terminal used in such a system
07/25/2000US6094587 Programming of a telephone's ringing tone
07/20/2000DE10000441A1 Current supply arrangement for a mobile telephone with a vibration coil
07/20/2000DE10000437A1 Portable, programmable call signaling device
07/19/2000EP1020062A1 Visual alarm for a communication module
07/19/2000EP1019999A1 Self-contained recharging device for portable telephone and/or battery and/or protective case
07/19/2000CN2388786Y Ringing circuit of telephone
07/18/2000US6091284 Current control circuit
07/11/2000US6088599 Fixed subscriber unit
07/11/2000US6088440 Method and apparatus for operating a telephone exchange having selectable audio sources
07/11/2000US6087823 Electronic inductance circuit
07/06/2000WO2000039994A1 System and method of power limiting call processing in telecommunications equipment
07/06/2000WO2000039985A1 Telephone answering device with timer control
07/06/2000WO2000014971A3 Bell sound selecting method for a cellular phone using an audio response system
07/06/2000CA2356668A1 Telephone answering device with timer control
07/05/2000EP1017220A2 Circuit for ringing signal generation for subscriber circuits
07/05/2000EP1017211A2 Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission
07/05/2000EP0653136B1 Method and apparatus for providing power to a coaxial cable network
07/05/2000CN1259259A A method in a subscriber line interface circuit as well as a subscriber line interface circuit
07/05/2000CN1259256A Residential protection service center
07/04/2000US6084961 Circuit for monitoring battery voltages of telephone terminal facility, using power detector temporarily activated by ringing or off-hook signal
07/04/2000US6084960 Power supply circuit using a constant current and telephone apparatus including such a circuit
07/04/2000US6084959 Method and apparatus for controlling the ring volume of a telephone
06/2000
06/29/2000WO2000038404A1 Circuit and method for remote feeding
06/29/2000WO2000013428A3 Portable communication equipment with mode conversion property and mode conversion control system
06/28/2000EP1014674A1 A method and a telecommunication apparatus for creating an alerting signal
06/28/2000EP1014535A2 Uninterrupted power supply system
06/28/2000CN1258159A Power supplied form telephone line for auxiliaries and operation method thereof
06/28/2000CN1258157A Analogous user circuit
06/23/2000CA2293032A1 Uninterrupted power supply system
06/22/2000WO2000036857A2 Method for implementing a sound message send/receive service in a telecommunication network
06/22/2000WO2000036816A1 Method for setting the volume for the reproduction of calling tones
06/22/2000WO2000036809A1 Voltage and current protection arrangement for a telephone subscriber line interface circuit
06/22/2000WO2000036808A1 On-hook telephone line event/ring monitor
06/21/2000EP1011258A2 Telephone line-powered power supply for ancillary equipment and method of operating thereof
06/21/2000EP1011249A2 An apparatus for informing a user of predetermined condition by vibration
06/21/2000EP1011248A2 Method and apparatus for displaying background image in mobile telephone
06/21/2000EP1010349A2 Modular digital telephone system and method including a universal telephony shelf
06/21/2000EP1010311A4 Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit
06/21/2000EP1010311A1 Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit
06/21/2000CN1257391A Method for indicating background pattern in mobile telephone
06/20/2000US6078816 Method and apparatus for establishing clear wireless communication
06/20/2000US6078661 Modular network interface device
06/15/2000WO2000035158A1 Current mode data transmission
06/15/2000DE19857534A1 Verfahren zur Einstellung der Lautstärke für die Wiedergabe von Ruftönen Method for adjusting the volume for playback of rings
06/15/2000CA2354013A1 Current mode data transmission
06/14/2000EP1009192A2 Distributed 1x N protection switching architecture
06/14/2000EP1009156A2 Device and method for local power and signal feeding into subscriber lines
06/14/2000EP1008394A1 Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversion
06/13/2000US6075998 Communication apparatus capable of announcing reception of a call by a melody sound composed by a user
06/13/2000US6075856 Subscriber circuit
06/10/2000CA2287607A1 Distributed 1xn protection switching architecture
06/10/2000CA2255478A1 Cable modem with uninterrupted power
06/08/2000WO2000033488A1 Fiber to the curb and fiber to the neighborhood power architecture
06/08/2000WO1999007162A8 Power conservation for pots and modulated data transmission
06/07/2000EP1005755A1 Power conservation for pots and modulated data transmission
06/06/2000US6073003 Telephone and auxiliary power distribution system
06/06/2000US6072859 Apparatus and method of generating voice message of caller's number in case of incoming call in telephone
05/2000
05/31/2000CN1255026A Selective calling receiver and method for alarm operation of switching it
05/30/2000US6069950 Dual-limit current-limiting battery-feed circuit for a digital line
05/25/2000WO2000030219A2 Jack assembly
05/16/2000CA2169745C Voice activity detector
05/10/2000EP0999691A1 Ring type based on call related information
05/10/2000EP0999530A2 Visual alerting apparatus
05/10/2000EP0978190A4 Direct digital access arrangement circuitry and method for connecting to phone lines
05/09/2000US6061647 Voice activity detector
05/04/2000DE19848606A1 Circuit layout for electronically generating a call impedance in telephone appliances taps call alternating voltage between first and second input terminals while regulating impedance with a programmable digital filter.
05/04/2000CA2284213A1 Ring type based on call related information
05/03/2000EP0998111A1 Circuit arrangement for feeding a telephone subscriber loop
05/03/2000EP0998105A1 Mobile telephone ringing method
05/02/2000US6058164 Mode-switchable telephone and mode setting and switching methods for the same
04/2000
04/27/2000WO2000024181A1 Circuit for electronically generating a call impedance
04/27/2000DE19848535A1 Telephone apparatus e.g. cellular phone stores natural or technically produced noise as ringing tone in an electronic storage (RAM)
04/26/2000EP0995303A2 Method and apparatus for controlling a telephone ring signal
04/25/2000US6055445 Wireless communication apparatus and indication control method therefor
04/25/2000US6055416 Prevention of audible control signal transmission
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