Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 3 - Selecting arrangements
Patents for H04Q 3 - Selecting arrangements (38,975)
08/1982
08/17/1982US4345116 Dynamic, non-hierarchical arrangement for routing traffic
08/17/1982US4345115 Telephone line interface
08/10/1982US4344170 Time division switching circuit with time slot interchange
08/10/1982CA1129529A1 Speech channel switching networks suitable for use in combination with electronic key telephone sets
08/04/1982EP0056949A1 Matrix coupling field for megahertz signal frequencies
08/03/1982CA1129054A1 Data base communication call processing method
07/1982
07/28/1982EP0056600A2 Modular structure of PCM-switched distributed control and distributed-diagnostic network
07/27/1982CA1128629A1 Routinable clock circuit
07/27/1982CA1128628A1 Low power consumption relay switching circuit for use in conjunction with a line test trunk interfacing to a test desk
07/20/1982US4340775 Apparatus and method for controlling a modular telecommunication system
07/20/1982CA1128223A1 Telephone supervision system using dtmf signals
07/14/1982EP0055944A1 Matrix switching system
07/14/1982EP0055943A1 Transfer bus matrix switching system
07/13/1982CA1127766A1 Time division switching circuit with time slot interchange
07/08/1982WO1982002287A1 Voltage controlled transient protection unit
07/06/1982US4338495 Electronic key telephone systems
07/06/1982CA1127329A1 Telephone system without central office
07/06/1982CA1127279A1 Expandable digital switching network
06/1982
06/29/1982US4337378 On-hook/off-hook detector circuit
06/24/1982WO1982002133A1 A method and apparatus for transferring the same information to a plurality of receivers
06/22/1982US4336424 Circuit arrangement for monitoring operating conditions of direct current devices
06/22/1982US4336423 Device for increasing the parallel inductance of a transformer
06/22/1982CA1126372A1 Switching matrix for wideband transmission electrical signals
06/16/1982EP0053957A1 Switching device for optical bundles and telephone exchange comprising such a device
06/08/1982US4334126 Control circuit for concurrently monitoring and controlling functions and frequency modulating status information in a digital data network
06/08/1982CA1125420A1 Opto electronic switching network
06/02/1982EP0053028A1 Semiconductor switch
06/02/1982EP0052863A1 Addressing device for a register group of a switching exchange
05/1982
05/25/1982US4332026 Multiple data rate digital switch for a TDMA communications controller
05/25/1982US4331956 Control means for a solid state crossbar switch
05/25/1982US4331950 Broad band switching network
05/25/1982US4331835 Interface unit for a modular telecommunication system
05/25/1982CA1124419A1 Temporal connection network and means to palliate breakdowns
05/18/1982US4330770 Magnetically controlled switching device
05/18/1982CA1123962A1 Computer communication network adapter
05/13/1982WO1982001633A1 Arrangement at telephone exchanges,particularly for connecting such exchanges with each other for example through a line separated from the public telephone network
05/04/1982US4328396 Total service telephone answering system
05/04/1982CA1123131A1 Transformerless trunk circuit
05/04/1982CA1123102A1 Line interface unit for voice and wide band signal coupling
04/1982
04/27/1982US4327418 High speed information selection and transfer system
04/27/1982US4327256 Telephone system
04/27/1982US4327253 Circuit arrangement for consecutively monitoring operating conditions of direct current devices
04/20/1982US4326298 Arrangement for signaling in a voice communication system with optically fed components
04/13/1982US4324953 Four-party automatic number identification circuit arrangements
04/13/1982CA1121893A1 High speed central office scanner
04/07/1982EP0048940A1 Subscriber connecting circuit
04/07/1982EP0048868A1 Communications system, especially telephone system
04/06/1982US4323984 Switching equipment using magnetic domains
04/06/1982CA1121513A1 Multiconfigurable modular processing system integrated with a preprocessing system
04/01/1982WO1982001106A1 Digital concentrator
04/01/1982WO1982001095A1 Processor interconnection system
03/1982
03/30/1982US4322581 Multifunction telephone with message information and control information circuits for connecting stations and common equipment in a telephone network
03/30/1982CA1121076A1 High voltage switch and capacitive drive
03/24/1982EP0048146A1 Solid state optically coupled electrical switch
03/24/1982EP0048129A1 Digital concentrator
03/23/1982US4321431 Trunk circuit with single coupling transformer
03/23/1982US4321430 Subscriber's connecting network comprising a symmetrical power amplifier for feeding a subscriber's line
03/16/1982US4320260 Circuit arrangement for determining the connection condition of a subscriber line in a telecommunications network
03/16/1982US4320259 Electronic selector for telecommunications switching
03/16/1982CA1120164A1 Data base auto bill calling using ccis direct signaling
03/16/1982CA1120145A1 Method and arrangement for controlling traffic over two-way trunks
03/09/1982US4319092 Current detection circuit arrangement for an automatic telephone exchange
03/02/1982CA1119282A1 Microprocessor control complex
02/1982
02/24/1982EP0046351A1 Improvements in or relating to electronic telephone exchanges and optical fibre links for use therein
02/23/1982CA1118875A1 Identifier for manual switchboards with conference facility
02/18/1982WO1982000554A1 Loop sensing circuit for use with a subscriber loop interface circuit
02/17/1982EP0045941A1 Dialling method for establishing a connection in a telephone switching system with digital speech transmission
02/09/1982US4315110 Multiple line telephone instrument
02/09/1982CA1118084A1 Alternate routing for a telephone system
02/02/1982US4314367 Switching circuit for digital packet switching network
02/02/1982US4314328 Information extractor for the selective visualization of data stored in a monitoring memory
02/02/1982US4314109 Synchronization system for key telephone system
02/02/1982CA1117636A1 Telephone exchange
01/1982
01/26/1982US4313035 Method of providing person locator service
01/26/1982US4313034 Connecting circuit for a telephone line
01/26/1982CA1117231A1 Signal processing apparatus for subscriber circuits
01/26/1982CA1117204A1 Integrated switching and transmission network
01/19/1982CA1116733A1 Interoffice callback arrangement
01/13/1982EP0043544A1 Method and apparatus for the automatic identification of the calling subscriber in step-by-step telephone exchanges
01/12/1982US4310727 Method of processing special service telephone calls
01/12/1982US4310726 Method of identifying a calling station at a call terminating facility
01/12/1982US4310724 Current detector circuit
01/12/1982CA1116282A1 Matrix type switching device
01/05/1982US4309766 Arrangement for subscriber circuits utilizing digital time division multiplex telecommunication installations and particularly for PCM local exchanges
01/05/1982US4309765 Process for transmitting items of information between devices of an indirectly controlled exchange system, in particular a telephone exchange system
01/05/1982CA1115869A1 Subscriber electronic equipment with two wire - four wire conversion circuit for telephone exchange
01/05/1982CA1115816A1 Interfacing circuits status detection arrangement in a telephone exchange
01/05/1982CA1115803A1 Distributed multiprocessor communication system
12/1981
12/30/1981EP0042666A1 Time division multiplex telecommunication digital switching module
12/24/1981WO1981003728A1 Subscriber line audio processing circuit apparatus
12/22/1981US4307461 Call processor for a satellite communications controller
12/22/1981US4307454 Arrangement preventing multiple connections to peripheral circuits
12/22/1981CA1114934A1 Dialed number to function translator for telecommunications switching system control complex
12/15/1981US4306303 Switching of digital signals
12/15/1981CA1114513A1 Self-correcting solid state mass-memory organized by words for a stored program control system
12/08/1981US4305148 Automatic exchange with a digital switching network
12/08/1981CA1114084A1 Electronic telephone circuit for subscriber-line
11/1981
11/25/1981EP0040412A1 Intelligent and programmable peripheral equipment for the asynchronous management of sensors and drivers in a telecommunication network
11/24/1981US4302636 Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange
11/24/1981US4302632 Digitally-controlled telephone answering switching system
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