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)
05/2003
05/29/2003US20030100336 Control of an alert mechanism by communication of an event-associated command
05/29/2003US20030099346 Telecommunication line driver having synthesized output impendance derived from output current sensing circuit
05/29/2003US20030099336 Method and system for audibly announcing an indication of an identity of a sender of a communication
05/27/2003US6571091 Power control method and apparatus suitable for use in a radio communication device
05/27/2003US6570983 Method and system for audibly announcing an indication of an identity of a sender of a communication
05/27/2003US6570982 Digital clocking synchronizing mechanism
05/27/2003US6570981 Device and method for expanding legacy switches
05/22/2003US20030096639 Distinctive recordable ringer
05/22/2003US20030095655 Subscriber line interface device
05/21/2003CN2552132Y Tone generator device of shared channel parameter
05/21/2003CN1109429C Dual use speaker for both voice communication and signalling
05/20/2003US6567522 Voltage alternating switch circuit
05/20/2003US6567521 Subscriber loop interface circuitry having bifurcated common mode control
05/20/2003US6567518 Method of field programmable gate array configuration
05/20/2003US6567517 Timing and switching array and method
05/20/2003US6566957 Methods and systems for a MOSFET-bipolar complimentary symmetry driver with local feedback for bias stabilization
05/15/2003WO2003041381A2 Least mean power consumption in telecommunications systems
05/15/2003US20030093701 Least mean power consumption in telecommunications systems
05/15/2003US20030093370 Wireless terminal capable of automatically setting its functions and method for the same
05/15/2003US20030092311 Comb and a method for making a branch connection to preexisting cabling
05/15/2003US20030091140 Digital access arrangment circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance
05/14/2003EP1311024A1 Comb and method of making a branch junction for a pre-existing wiring
05/14/2003CN1418020A Input-controlled electronic ringing generator
05/14/2003CN1108593C Method for crediting or recrediting data card with given amount
05/13/2003US6563922 Arbitration mechanism
05/13/2003US6563619 Infrared data communication apparatus and method
05/08/2003US20030086561 XDSL splitter module for field wiring cabinet
05/06/2003US6560467 Mobile phone provided with a device for notifying the user of the reception of a call signal and method therefor
05/06/2003US6560466 Auditory feedback control through user detection
05/06/2003US6560333 MOS transistors substitute circuit having a transformer/data interface function, particularly for ISDN networks and corresponding control and driving switch configuration
05/06/2003US6560323 Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access
05/01/2003WO2003036920A2 Ringing controller
05/01/2003US20030083110 Apparatus for producing a visual signal upon ringing of a portable communications device
05/01/2003US20030079598 Portable telephone set with reproducing and composing capability of music
04/2003
04/30/2003CA2410151A1 Xdsl splitter module for field wiring cabinet
04/29/2003US6556665 Portable telephone set
04/29/2003US6556564 Scheduled internet protocol telephone instrument system
04/29/2003US6556562 System to provide lifeline IP telephony service on cable access networks
04/24/2003WO2003034185A2 Method and system for dsl power saving
04/24/2003US20030078081 Call announcement system and method
04/23/2003EP1303972A1 Method of generating a ring signal in a subscriber line interface circuit
04/23/2003CN1413407A 便携式电话 Portable Phone
04/23/2003CN1413046A Wireless transmission for electronic official card
04/23/2003CN1413045A Communication network terminal with menu
04/23/2003CN1413044A Communication network terminal of access internet
04/23/2003CN1413006A Ring booster circuit for expanding ringing range of tetephone user interface circuit
04/23/2003CN1412991A Transmission of electronic calendar data
04/22/2003US6553118 Method and apparatus for calculating DC offset in a digital gyrator
04/17/2003US20030072435 Telephone apparatus for stabilizing call in no power operation mode and method for controlling the same
04/16/2003EP1303123A2 Telephone apparatus for stabilizing call in no power operation mode and method for controlling the same
04/16/2003EP1303122A2 Method for driving a visualization device and associated elements for a terminal equipment
04/16/2003EP1302057A1 Alert signal generation
04/16/2003EP1302023A2 System and method for providing power over a home phone line network
04/15/2003US6549790 Portable telecommunication apparatus for multiple audio accessories
04/15/2003US6549610 Subscriber circuit having splitter disconnection function
04/15/2003CA2247449C A communication network terminal supporting a plurality of applications
04/10/2003WO2003030563A2 Front access dsx assembly
04/10/2003WO2003030562A2 Input power connector for distribution panel
04/10/2003WO2003030515A1 Method for transmission of charge-determining signals via a data transmission path using resonance effects
04/10/2003US20030068050 Method for transmitting charging signals via a data transmission path using resonance phenomena
04/10/2003US20030068032 Ringing subscriber line interface circuit with full differential analog interface
04/10/2003US20030068031 Ring boost circuit to extend ringing range of telephone SLICs
04/09/2003EP1301019A2 Ring boost circuit for SLICs
04/09/2003EP1300963A1 Echo processing apparatus
04/03/2003WO2003028354A1 Method for adjusting an acoustic sequence
04/03/2003WO2001069697A3 Continuity testing in communication networks
04/03/2003US20030064760 Telephone system with controllable ringing voltage
04/03/2003US20030064611 Front access DSX assembly
04/03/2003US20030062183 Input power connector for distribution panel
04/02/2003EP1298954A1 Method for automatically selecting the alert type for a mobile communications device
04/02/2003CN1407827A Receiver, method, program and carrier signals adapted to volume of calling in signal
04/02/2003CN1407825A Device and method for inhibiting mobile call ringing automatically
04/02/2003CN1407815A Network switching apparatus with power supply to network communication facilities via dual twist wires
04/02/2003CN1104835C Improved isolation device for electronic equipment
04/01/2003US6542605 Method and arrangement for choosing supply voltage
03/2003
03/27/2003WO2003026320A1 Method and device for single conductor local transmission of pcm signals without transformers
03/27/2003WO2003026270A1 A method and apparatus for alerting users of incoming calls
03/27/2003DE20219524U1 Mobile phone battery charger includes smoke alarm with short range radio link
03/26/2003EP1296434A2 Communication device power supplying structure
03/26/2003CN1104148C Communication apparatus capable of announcing reception of call by melody sound composed by user
03/25/2003US6539218 Message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method
03/20/2003US20030054867 Method and apparatus for alerting users of incoming calls and messages
03/20/2003US20030054866 Method for automatically selecting the alert type for a mobile electronic device
03/19/2003CN1404679A Electroacoustic apparatus having ringing signal generation means capable of producing a subjective bass perception
03/19/2003CN1404357A Power supply structure for communication equipment
03/13/2003US20030048896 Telephone system with current regulation in the constant current region
03/13/2003US20030048002 System and method for reducing power dissipation in line driver circuits
03/12/2003CN1402579A Mobile radio terminal device capable of informing using different ringing contents
03/11/2003US6532477 Method and apparatus for generating an audio signature for a data item
03/10/2003CA2357708A1 Cellular phone with increasing ring sound
03/06/2003WO2003019954A2 Interconnect chassis and module
03/06/2003WO2002067404A8 Wireless communication device and method of switching power supply
03/06/2003US20030045274 Mobile communication terminal, sensor unit, musical tone generating system, musical tone generating apparatus, musical tone information providing method, and program
03/06/2003US20030043566 Communication device power supplying structure
03/06/2003DE20217105U1 Low current supply for wireless telephone handset charging has cable connection
03/05/2003CN1400845A Mobile communication terminal equipment capable of changing output sound and its output sound controlling method
03/04/2003CA2092808C Arrangement for protecting telecommunictions equipment from voltage transients
02/2003
02/27/2003WO2003017638A1 Telephone system with adjustable ringer voltage
02/27/2003WO2003017637A1 Telephone system with current regulation in a constant current zone
02/27/2003WO2003017632A1 System and method for reducing power dissipation in line driver circuits
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