Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 3 - Automatic or semi-automatic exchanges
Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881)
12/1993
12/01/1993EP0503059A4 Enhanced wide area audio response network
12/01/1993CN1079091A A method of producing an intelligent network service
12/01/1993CN1079090A A person paging method
11/1993
11/30/1993US5267310 Control circuit for automatic elimination of telephone line noise
11/30/1993US5267309 Telephone line unit having programmable read-only memory
11/30/1993US5267307 Communication apparatus
11/30/1993US5267305 Transparent inband signaling
11/30/1993US5267304 Directory assistance system
11/30/1993CA2013374C Authenticated communications access service
11/29/1993CA2092597A1 Arrangement for obtaining information from a switching system database by an adjunct processor
11/25/1993WO1993023962A1 Method of controlling traffic in a telecommunication network
11/25/1993WO1993023961A1 A monitoring device for a u-link
11/25/1993DE4236046C1 Intercom system with centralised control - uses duplex amplifiers in connection path between calling and called speech stations with respective amplifier paths for each direction
11/24/1993EP0571291A1 Telephone line access control device
11/24/1993EP0571109A2 Overvoltage protection scheme for subscriber loops and method of performing same
11/24/1993EP0570654A1 A remote eart resistance meter
11/24/1993CN2147698Y Automatic telephone speak sound consulting device
11/24/1993CN1078836A Microcomputer interface for intelligent telephone
11/24/1993CN1022867C Memory card and switching system suitable for using same
11/23/1993US5265157 Answer supervision and service selection
11/23/1993US5265156 Telecommunications digital signal
11/23/1993US5265150 Automatically configuring wireless PBX system
11/23/1993US5265075 Voice processing system with editable voice files
11/18/1993EP0570082A2 Voice-operated service
11/18/1993DE4218296A1 Telephone line condition monitoring system - determines if telephone is hung up or not, using low impedance voltmeter as opto-coupling in series with zener diode
11/17/1993CN1078589A A method of supporting communication
11/17/1993CN1078588A A method of establishing a connection
11/17/1993CN1078587A A method of establishing cooperation with a functionality
11/17/1993CN1022788C Network service method for public/special network
11/16/1993US5263084 Spontaneous caller identification with call-waiting
11/16/1993US5263082 Text mail system using ISDN and ISDN communication terminal device for use therein
11/16/1993US5263080 Telephone message storage system with out-of-band signalling
11/16/1993US5263025 Communication system and equipment
11/16/1993CA2007834C Path learning feature for an automated telemarketing system
11/16/1993CA1324448C Microcomputer integrating a digital subscriber terminal for an integrated service digital network
11/11/1993WO1993022885A1 Process for organising control data for control procedures taking place between at least one terminal and a shared central station in communication systems
11/11/1993WO1993022869A1 Improved telecommunication display system
11/11/1993WO1993022866A1 Interactive telephone system for optimizing service economy
11/11/1993WO1993022865A1 Hotel interactive communication apparatus
11/11/1993WO1993022864A1 Digital switching system connecting buses with incompatible protocols and telephone answering system and private automatic branch exchange with integrated voice and textual message recording
11/11/1993WO1993022863A1 Call processing control system
11/11/1993WO1993022860A1 Digital switching system interconnecting buses with incompatible protocols
11/11/1993DE4315243A1 Bidirectional selective remote connection and transmission circuit - detects or transmits audio signal after selection by relay of either high-impedance or low-impedance signal.
11/11/1993CA2134758A1 Improved telecommunication display system
11/10/1993EP0569260A2 Error performance monitoring system for digital exchange circuit
11/10/1993EP0569180A2 Intelligent telecommunications network
11/10/1993EP0569175A2 Call message recording for telephone systems
11/10/1993EP0569164A2 Automated telephone attendant
11/10/1993EP0569060A2 PABX cordless telephone system
11/10/1993EP0568792A2 Call progress monitoring
11/10/1993EP0568770A2 A system for automatically storing telephone transaction information
11/10/1993CN1078338A Method of organizing communication
11/09/1993US5261061 Remote maintenance and administration method in a switchboard system
11/09/1993US5260994 Maintenance termination unit module
11/09/1993US5260990 Multiple integrations unit for coupling different switching systems to a message storage system
11/09/1993US5260986 Group notification service and system
11/09/1993US5260938 Switching system comprising a conference arrangement
11/09/1993CA2092591A1 Intelligent telecommunications network
11/09/1993CA2014408C Dynamic shared facility system for private networks
11/03/1993EP0568241A2 Network for establishing multiple digital channels on-demand
11/03/1993EP0568240A1 Method for selectively controlling the propagation of DTMF-signals
11/03/1993EP0568114A2 Data analysis systems and methods
11/03/1993EP0567634A1 Security systems based on recording unique identifier for subsequent playback
11/03/1993EP0567548A1 System for distinguishing or counting spoken itemized expressions
11/03/1993EP0311647B1 Message service system network
11/03/1993CN2145483Y Electric characteristic test apparatus for region telephon exchange net
11/03/1993CN1078080A Hybrid fiber in the loop telephony system
11/03/1993CN1022660C Pulsed full automatic telephonic extension and exchange device
11/02/1993US5259026 Method for speed calling automatic update
11/02/1993US5259024 Telephone answering service with integrated voice and textual message storage
11/02/1993US5259023 Telephonic-interface statistical analysis system
11/02/1993US5258713 Impedance generator for a telephone line interface circuit
11/02/1993CA2012162C Electronic exchange system wherein it is easy to alter the functions assigned to the keys of a terminal, and method of controlling an electronic exchange system
10/1993
10/28/1993WO1993021723A1 Impedance synthesizer for a subscriber line interface circuit
10/28/1993WO1993021722A1 Wideband telephone line interface circuit
10/28/1993WO1993021721A1 Speech recognition system for electronic switches in a cellular telephone or personal communications network
10/28/1993WO1993021720A1 Methods and apparatus for controlling access to toll free telephone service
10/28/1993WO1993021718A1 Toll call telephone service center
10/27/1993EP0567439A1 An arrangement for comparing subjective dialogue quality for mobile telephone systems
10/27/1993EP0567294A2 Multi-system network addressing
10/27/1993EP0567204A1 Method and circuit for monitoring digital periodical signals
10/27/1993EP0566582A1 Location registration system for a personal communicator
10/26/1993US5257364 Method for generating a correlated sequence of variates with desired marginal distribution for testing a model of a communications system
10/26/1993CA2016797C Communication network cut-off detection arrangement
10/24/1993CA2094166A1 Automated attendant for any combination of pbx, centrex and single-line telephones
10/22/1993CA2094163A1 Multi-system network addressing
10/20/1993EP0566242A1 Remotely initiated telemetry calling system
10/20/1993EP0566209A1 Cost-optimised routing in a telecommunications network
10/20/1993EP0566194A2 Conference system with automatic speaker detection and speaker unit for use in the conference system
10/20/1993EP0565850A1 Integrated messaging system
10/20/1993EP0565687A1 An arrangement for the control of an echo canceller.
10/20/1993EP0565671A1 A method of converging an echo canceller
10/20/1993EP0565609A1 Method and apparatus for detecting digital carrier signals on telephone cables
10/20/1993EP0470090B1 Automatically resetting protection arrangement for a telephone subscriber line interface circuit
10/20/1993CN2144380Y Controller for long-distance direct dialling telephone
10/19/1993US5255340 Method for detecting voice presence on a communication line
10/19/1993US5255317 ISND (Integrated Services Digital Network) and POTS (Plain Old Telephone
10/19/1993US5255315 Method of rerouting telecommunications traffic
10/19/1993US5255314 Switch adjunct integration arrangement
10/19/1993US5255310 Method of approximately matching an input character string with a key word and vocally outputting data
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