H04M 3 - Automatic or semi-automatic exchanges

Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881)
09/1988
09/06/1988	CA1241783A1 Remotely addressable controller
08/1988
08/31/1988	EP0279884A1 Telephonic data access and transmission system
08/30/1988	US4768224 Single telephone line call forwarding device
08/30/1988	US4768221 Remote reprogramming system for telephone call forwarding service
08/30/1988	US4768217 Public telephone set
08/24/1988	EP0279355A2 A remote maintenance system for a digital communication network
08/23/1988	US4766604 Method for receiving and delivering voice messages
08/23/1988	US4766594 Digital network system having arrangement for testing digital subscriber line
08/23/1988	US4766592 Broadcast conferencing arrangement
08/23/1988	US4766542 Automatic reminder to tend to refilled prescriptions at the pharmacy
08/18/1988	DE3703723A1 Method for setting up a specific subscriber connection by means of dialling information with different numbers of digits
08/18/1988	DE3634782C1 Operator's or enquiry station for a telephone switching system, particularly a multiple broker's facility
08/17/1988	EP0278289A2 Testing device for a broadband switching network
08/17/1988	EP0168410B1 An improved maintenance termination unit
08/17/1988	CN88100083A Control system for interunit communication
08/16/1988	US4764966 Method and apparatus for voice detection having adaptive sensitivity
08/16/1988	US4764956 Active impedance line feed circuit
08/16/1988	US4764950 Snap-on network interface unit
08/16/1988	US4764949 Subscriber/craftsperson ringback apparatus
08/16/1988	US4764918 Telecommunication switching system
08/11/1988	WO1988005985A1 Automatic speech recognition to select among call destinations
08/09/1988	US4763354 Key telephone system
08/09/1988	US4763353 Terminal based adjunct call manager for a communication system
08/09/1988	US4763350 Facility for detecting and converting dial information and control information for service features of a telephone switching system
08/09/1988	US4763191 Dial-up telephone network equipment for requesting an identified selection
08/09/1988	CA1240431A1 Speech additive distribution equipment for conferencing system
08/09/1988	CA1240428A1 Coin trunk test set
08/03/1988	EP0276622A2 Broker's call arrangement
08/03/1988	EP0276493A2 Method for expanding the connection capacity and line access of call-handling or information positions in telephone exchanges, especially multiple operator's position exchanges
08/02/1988	US4761808 Time code telephone security access system
08/02/1988	US4761807 Electronic audio communications system with voice authentication features
08/02/1988	US4761779 Subscriber's line switching control system
08/02/1988	CA1240089A1 Circuit for maintaining hybrid cancellation of signals in a communication system
08/02/1988	CA1240087A1 Limiting amplifier for common mode feedback in telephone line feed circuits
08/02/1988	CA1240021A1 Reprogrammable call forwarding device
07/1988
07/27/1988	EP0275448A1 Method for putting into operation a programme-controlled modular communication system
07/26/1988	CA1239717A1 Fully-automatic telephone directory assistance apparatus and method
07/26/1988	CA1239712A1 Conference circuit for digital communication systems
07/20/1988	EP0275076A2 Control system for communication between units
07/20/1988	EP0274653A2 Method for diagnosing and testing an interface unit
07/19/1988	US4759056 Personal-servicing communication system
07/19/1988	US4759055 Key telephone system
07/19/1988	US4759049 Trunk identification system
07/19/1988	US4758920 Telephone and data overvoltage protection apparatus
07/19/1988	US4758822 Bidirectional amplifier
07/14/1988	WO1988005239A1 Improved polling system
07/12/1988	US4757529 Call distribution arrangement
07/12/1988	US4757526 Signal transfer arrangement
07/12/1988	US4757525 Electronic audio communications system with voice command features
07/12/1988	US4757494 Method for generating additive combinations of PCM voice samples
07/12/1988	US4757493 Multi-party telephone conferencing apparatus
07/12/1988	US4757267 Telephone system for connecting a customer to a supplier of goods
07/12/1988	CA1239211A1 Automatic call coverage for unattended pbx stations
07/12/1988	CA1239209A1 Communication system having abbreviated dialing access
07/07/1988	DE3644228A1 Method for call diversion in centrally controlled switching systems
07/06/1988	CN87101278A Active impedance line feed circuit
07/06/1988	CN85109286B Multi-purpose speech-sound/data system
07/05/1988	US4756020 Method and apparatus for disallowing the extension of a call through a network
07/05/1988	US4756017 Telephone test device
07/05/1988	US4755995 Program update in duplicated switching systems
07/05/1988	US4755932 Interpreter program for providing commands to a computer application program
07/05/1988	CA1238967A1 Automatic route selection of a private telephone network path on the basis of a public telephone network number
07/05/1988	CA1238966A1 Automatic redialing arrangement for multi-line telephone station sets
07/05/1988	CA1238957A1 Switched capacitor coupled line receiver circuit
06/1988
06/30/1988	DE3732109A1 Telefonvermittlungssystem Telephone switching system
06/30/1988	DE3643614A1 Modular-design communications system
06/30/1988	DE3642849A1 Method for decentralised identification of overloads in central control devices of communications switching systems, in particular telephone switching systems
06/29/1988	EP0272828A2 Communication system dynamic conferencer circuit
06/29/1988	EP0272800A2 Active impedance line feed circuit
06/29/1988	EP0272513A2 Method for testing an interface unit
06/28/1988	US4754480 Circuit arrangement for telecommunication switching systems connected to line concentrator sub-exchanges by connecting channels
06/28/1988	US4754479 Station number portability
06/28/1988	US4754478 Method of adding additional subscribers and signals to existing connection
06/28/1988	US4754476 Premises page/intercom system utilizing telephone set component
06/28/1988	US4754475 Calling line tracing system and identification detector
06/28/1988	US4754472 Telecommunication systems
06/28/1988	US4754455 Telephone signal transmission device
06/28/1988	US4754345 Additional memories storing substantial information
06/28/1988	US4754258 Integrated digital circuit for processing speech signal
06/28/1988	CA1238735A1 Method and apparatus for sharing operators among assistance systems
06/28/1988	CA1238734A1 Speech response interface circuit
06/28/1988	CA1238733A1 Low resistance origination scan circuit
06/28/1988	CA1238732A1 Universal telephone test apparatus
06/23/1988	DE3642625A1 Circuit arrangement for protecting electronic apparatuses against overloading
06/23/1988	DE3642003A1 Method for decentralised prevention of overload in control devices of communications switching systems, in particular telephone switching systems
06/22/1988	EP0271993A2 Surge protection for telecommunications terminals
06/21/1988	US4752951 Method of providing location dependent person locator service
06/15/1988	EP0271274A2 Implied principal busy status indicator for covered calls
06/15/1988	EP0270604A1 Message delivery system and method.
06/15/1988	EP0161300B1 Multimode data communication system
06/08/1988	EP0270189A2 Conference circuit for a digital communication system
06/08/1988	CN87200589U Multifrequency signal transmitting and receiving device by digital method
06/07/1988	US4750170 Line access apparatus for in-band communication
06/07/1988	US4750166 Conference circuit
06/07/1988	US4750136 Communication system having automatic circuit board initialization capability
06/07/1988	US4750116 Hardware resource management
06/07/1988	CA1237838A1 Telephone operator voice storage and retrieval system
06/07/1988	CA1237805A1 Telephone switching system adjunct call processing arrangement
06/07/1988	CA1237800A1 Communication system with voice announcement means
06/01/1988	EP0269364A2 Apparatus and method for inputting telephone dialling commands to a telephone communication system

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