| Patents for H04Q 3 - Selecting arrangements (38,975) |
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| 08/14/1984 | US4466062 Apparatus for CCIS data transfer between a CPU and a plurality of data terminal equipment |
| 08/07/1984 | US4464748 In a telephone switching system |
| 08/01/1984 | EP0114433A1 Telephone switching system |
| 07/31/1984 | US4463235 Switch with several layers of crossing points |
| 07/31/1984 | CA1171946A1 Time division switching matrix |
| 07/25/1984 | EP0113884A2 Communications installation, in particular a private branch exchange with subscriber and trunk groups and interface modules |
| 07/24/1984 | CA1171532A1 Person identification system for controling an apparatus |
| 07/11/1984 | EP0113272A1 Modular nodal communication network |
| 07/10/1984 | US4459434 Home telephone exchange |
| 07/04/1984 | EP0112728A1 Subscriber telephone system |
| 07/03/1984 | US4458112 Floating subscriber loop interface circuit |
| 06/26/1984 | US4456940 Voltage controlled transient protection unit |
| 06/26/1984 | US4456791 Off-hook detector with reduced sensitivity to common mode |
| 06/26/1984 | US4456788 Telecommunication trunk circuit reporter and advisor |
| 06/26/1984 | CA1169974A1 Communication system for connecting a plurality of asynchronous data processing terminals |
| 06/26/1984 | CA1169951A1 Device for addressing a set of recorders in a switching exchange |
| 06/20/1984 | EP0111406A1 Transmission integrity arrangement and method |
| 06/20/1984 | EP0111114A2 Circuit arrangement for a telephone exchange, expecially a private branch exchange with additional data communication |
| 06/19/1984 | US4455646 Pulse code modulated digital automatic exchange |
| 06/19/1984 | US4455645 Back-up control system implemented with a redundancy scheme for protection against failure |
| 06/19/1984 | US4455643 High speed optical switch and time division optical demultiplexer using a control beam at a linear/nonlinear interface |
| 06/19/1984 | US4455456 Digital supervisory circuit for a telephone system |
| 06/19/1984 | US4455455 Internodal conference call administrator |
| 06/19/1984 | CA1169597A1 Home communications and control system |
| 06/12/1984 | US4454477 Loop current detector with threshold setting impedance |
| 06/07/1984 | WO1984002207A1 A memory cartridge for connection to a telephone switching arrangement |
| 06/07/1984 | WO1984002206A1 A telephone switching arrangement |
| 06/05/1984 | US4453210 Multiprocessor information processing system having fault detection function based on periodic supervision of updated fault supervising codes |
| 06/05/1984 | CA1168738A1 Arrangement for communication between interactive telephone switching processors |
| 05/29/1984 | US4451703 All electronic interface for telephony system |
| 05/24/1984 | WO1984002023A1 Time-ordered data base |
| 05/24/1984 | WO1984002020A1 Hyperedge entity-relationship data base systems |
| 05/23/1984 | EP0109138A2 A remotely controlled crossconnection system |
| 05/10/1984 | WO1984001871A1 Acd management information system |
| 05/08/1984 | CA1167171A1 Communication system concentrator for connecting a plurality of asynchronous data processing terminals |
| 05/01/1984 | US4446552 Wideband switch crosspoint and switching matrix |
| 05/01/1984 | US4446338 Telephone lines status sensor |
| 05/01/1984 | CA1166777A1 Home telephone exchange |
| 05/01/1984 | CA1166729A1 Logic device for alarm pretreatment |
| 04/25/1984 | EP0106710A2 Optical switching device |
| 04/25/1984 | EP0106247A1 Telephone system |
| 04/25/1984 | EP0106198A1 Circuit arrangement for a telephone exchange, especially a private telephone exchange with speech and signal path switching over switches connected in series |
| 04/24/1984 | US4445001 Circuit arrangement for identifying telephone subscribers |
| 04/18/1984 | EP0105441A1 Telephone switching system for public or private telephone networks with at least one central dial information recording and processing device |
| 04/18/1984 | EP0105319A1 An optical switch and a time division optical demultiplexer using such switch. |
| 04/17/1984 | US4443773 Switching network for megahertz frequency signals |
| 04/17/1984 | US4443669 Subscriber connection circuit |
| 04/17/1984 | CA1165916A1 Electronic subscriber junctor |
| 04/17/1984 | CA1165894A1 Computer control systems |
| 04/11/1984 | EP0105184A1 Circuit for decreasing the noise voltages due to longitudinal currents |
| 04/10/1984 | US4442321 Transparent dialing between interconnected telecommunication switching systems |
| 04/04/1984 | EP0104637A2 Circuit arrangement for telecommunication exchanges, especially telephone exchanges, with central information processors having overload signal transmission |
| 04/03/1984 | US4441180 Service integrated communication transmission and interchange system |
| 04/03/1984 | US4440986 Microprocessor controller for simultaneously controlling a PBX and providing multiple user access for general purpose data processing |
| 04/03/1984 | CA1165029A1 Subscriber line audio processing circuit apparatus |
| 04/03/1984 | CA1165027A1 Telephone set |
| 03/29/1984 | WO1984001248A1 Pulse width modulated telephone line interface |
| 03/28/1984 | EP0103976A1 Line concentrator |
| 03/27/1984 | US4439636 Credit card actuated telecommunication access network |
| 03/27/1984 | US4439634 Carrier subscriber telephone off-hook detector |
| 03/26/1984 | EP0091932A4 Telephone switching control arrangement. |
| 03/21/1984 | EP0103335A2 Circuit arrangement for the exchange of messages within a telecommunication system consisting of a plurality of modular units |
| 03/21/1984 | EP0103324A2 Simultaneous voice and data transmission circuit having a digital loop transceiver |
| 03/21/1984 | EP0103083A2 Modular self-routing PCM switching network for distributed-control telephone exchanges |
| 03/15/1984 | WO1984001068A1 A pulse code modulated digital automatic branch exchange |
| 03/13/1984 | US4437190 Device for switching signals by optical means and automatic switching units comprising said device |
| 03/13/1984 | US4436963 Implied principal addressing in a call coverage arrangement |
| 03/06/1984 | US4435620 Dial pulse delay circuit |
| 03/06/1984 | CA1163387A1 Circuit for use in a telephone set |
| 02/29/1984 | EP0101449A1 A method and apparatus for giving identity to, and selecting one of a plurality of function units. |
| 02/22/1984 | EP0100842A2 Circuit switching arrangement |
| 02/21/1984 | US4433331 Programmable logic array interconnection matrix |
| 02/21/1984 | US4433213 Subscriber's line circuit for telecommunications networks |
| 02/21/1984 | US4433212 Telephone line interface circuit |
| 02/14/1984 | US4432089 Digital loop transceiver for interfacing a digital PABX to a digital subscriber set via a subscriber line |
| 02/14/1984 | US4431992 Circuit for addressing a set of registers in a switching exchange |
| 02/14/1984 | US4431872 Telecommunication receivers |
| 02/14/1984 | US4431868 Solid state telephone line interface circuit with ringing capability |
| 02/14/1984 | CA1162336A1 System for entering and processing gamble stakes |
| 02/07/1984 | US4430733 Switching of digital signals |
| 02/01/1984 | EP0099761A2 Junction circuit for coupling an additional line to an intercommunication set |
| 01/25/1984 | EP0099272A2 Loop circuit for a telephone line |
| 01/25/1984 | EP0099128A2 Circuit for delivering direct current signalisation signals to a signalisation signal convertor |
| 01/24/1984 | US4428044 Peripheral unit controller |
| 01/24/1984 | CA1161177A1 Multiple line telephone instrument |
| 01/17/1984 | CA1160780A1 Trunk interface circuit with current compensation |
| 01/17/1984 | CA1160778A1 Loop detecting circuit |
| 01/17/1984 | CA1160697A1 Broadband high speed optoelectronic semiconductor switch |
| 01/10/1984 | US4425641 Time division multiplex telecommunication digital switching modules |
| 01/04/1984 | EP0097360A2 Modular self-routing PCM switching network with virtual-channel routing control for distributed-control telephone exchanges |
| 01/04/1984 | EP0097314A2 Telephone line interface circuit |
| 01/03/1984 | CA1159975A1 Communication system signaling circuit |
| 12/28/1983 | EP0096937A1 Method of preventing overloading of the central controller of a telecommunication system and arrangement for performing the method |
| 12/28/1983 | EP0096756A2 Electronic subscriber junctor |
| 12/27/1983 | US4423507 Communications system for interconnecting a plurality of asynchronous data processing terminals |
| 12/27/1983 | US4423330 Normally off bilateral switch |
| 12/27/1983 | US4423292 Detector circuit for communication lines |
| 12/27/1983 | CA1159541A1 Pcm switching element |
| 12/20/1983 | US4421965 Commutator with several layers of cross-points |
| 12/20/1983 | US4421955 Distributed switching system |