| Patents for H04Q 3 - Selecting arrangements (38,975) |
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| 05/09/1989 | CA1253987A1 State control for a real-time system utilizing a nonprocedural language |
| 05/09/1989 | CA1253986A1 Control of a real-time system utilizing a non- procedural language |
| 05/09/1989 | CA1253937A1 Held party notification feature |
| 05/05/1989 | WO1989004105A1 Switch path reservation arrangement |
| 05/03/1989 | EP0314373A2 Lightwave systems using optical amplifiers |
| 05/02/1989 | US4827500 Automatic speech recognition to select among call destinations |
| 05/02/1989 | US4827499 Call control of a distributed processing communications switching system |
| 05/02/1989 | CA1253600A1 Controlling multi-port hunt groups in a distributed control switching system |
| 05/02/1989 | CA1253599A1 Methods and apparatus for efficient resource allocation |
| 04/27/1989 | DE3734822A1 Wide-band signal switching device |
| 04/25/1989 | US4825460 Line interface unit for caller-controlled receipt and delivery of voice messages |
| 04/25/1989 | US4825349 Emergency D.C. power supply with the emergency state being indicated by polarity reversal |
| 04/25/1989 | US4825206 Automatic feedback of network topology data |
| 04/25/1989 | CA1253242A1 Routing of network traffic |
| 04/25/1989 | CA1253241A1 Automatic call distributor telephone service |
| 04/20/1989 | WO1989003566A2 Layered network |
| 04/20/1989 | DE3733717A1 Circuit for programming a telephony system or a telecommunication terminal |
| 04/19/1989 | EP0311956A2 Coupling device for broadband signals |
| 04/19/1989 | EP0311772A2 Method of operating a switched network of optical buses |
| 04/18/1989 | US4823374 Telephone exchange system with performance features activatable from an authorized subscriber station |
| 04/18/1989 | US4822124 Optical matrix switch |
| 04/18/1989 | CA1252868A1 Interface unit for transferring voice and data signals |
| 04/18/1989 | CA1252867A1 Network routing arrangement |
| 04/18/1989 | CA1252863A1 Communication system for providing business communication features to cellular mobile telecommunication customers |
| 04/18/1989 | CA1252861A1 Method and apparatus for disallowing the extension of a call through a network |
| 04/18/1989 | CA1252822A1 Spread spectrum wireless pbx |
| 04/12/1989 | EP0311347A2 Robust, collateral messaging and recovery system and method within a digital switch |
| 04/11/1989 | US4821316 Key telephone system |
| 04/11/1989 | CA1252549A1 Queueing protocol |
| 04/06/1989 | DE3732071A1 Process and arrangement for controlling a telephone private branch exchange |
| 04/05/1989 | EP0310184A1 Optical switching element enclosing two parallel lightguides and switching Matrix constituted with such elements |
| 04/04/1989 | US4818988 Crosspoint switching array |
| 04/04/1989 | US4818984 Broadcasting messages in a distributed processing system |
| 04/04/1989 | CA1252186A1 Integrated network controller for a dynamic nonhierarchical routing switching network |
| 04/04/1989 | CA1252185A1 Pbx intercept and caller interactive attendant bypass system |
| 03/30/1989 | DE3731337A1 Circuit arrangement for controlling reset commands in digitally controlled communications systems |
| 03/29/1989 | EP0309115A2 Line interface circuit |
| 03/28/1989 | US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
| 03/28/1989 | US4817083 Rearrangeable multiconnection switching networks employing both space division and time division switching |
| 03/28/1989 | US4817082 Crosspoint switching system using control rings with fast token circulation |
| 03/28/1989 | US4815827 For switching two input light rays between two outputs |
| 03/28/1989 | CA1251844A1 Telecommunication system, in particular telephone system |
| 03/23/1989 | WO1989002692A1 An improved cross-connect switch |
| 03/23/1989 | WO1989002680A1 Optical distributor |
| 03/23/1989 | WO1989002614A1 An optical space switch |
| 03/23/1989 | DE3730761A1 Method for controlling the setting up of a call (connection set-up) in the case of a centrally controlled telecommunications exchange, especially a telephone exchange |
| 03/22/1989 | EP0307401A1 Method and apparatus for providing variable reliability in a telecommunication switching system. |
| 03/21/1989 | US4815127 Communication system using unbalanced communication paths |
| 03/21/1989 | US4815126 Telephone line switch |
| 03/21/1989 | US4815070 Node apparatus for communication network having multi-conjunction architecture |
| 03/21/1989 | US4814762 Method for transmitting data |
| 03/21/1989 | CA1251587A1 Ringing signal reformatting circuit |
| 03/21/1989 | CA1251546A1 Terminating port determination in a distributed control switching system using a distributed database |
| 03/15/1989 | EP0307244A1 An optical space switch |
| 03/15/1989 | EP0307243A1 Optical distributor |
| 03/15/1989 | EP0306520A1 Telephone call monitoring, metering and selection device |
| 03/09/1989 | WO1989002139A1 Use of telecommunications systems for lotteries |
| 03/08/1989 | EP0305701A2 Circuit arrangement for the operation of call handling or information positions in centrally controlled telephone exchanges, especially multiple operator's position exchanges |
| 03/07/1989 | US4811388 Telecommunication network including a central back-up memory |
| 03/07/1989 | US4811381 Direct inward dial integration apparatus |
| 03/07/1989 | US4811334 Method of operation of a nodal telephone and data communication network to provide specific facilities in changeable domains of the network |
| 03/07/1989 | US4811333 Substantially non-blocking space switching arrangement |
| 03/07/1989 | US4811014 Circuit arrangement for telecommunications systems, particularly telephone switching systems, comprising information interrogating devices cyclically driving inquiry locations |
| 03/07/1989 | CA1250938A1 Controlling multi-port hunt groups in a distributed control switching system |
| 03/07/1989 | CA1250937A1 Directory number translation in a distributed control switching system |
| 03/01/1989 | EP0304652A2 Method for a programme-controlled telephone exchange by which service features concerning the realisation of a speech connection are introduced from a subscriber terminal |
| 02/28/1989 | US4809321 Busy/no-answer call completion equipment |
| 02/28/1989 | US4809318 Method of overload control for the central control of a telecommunication system and arrangement for implementing the method |
| 02/28/1989 | US4809260 Telephone exchange |
| 02/28/1989 | CA1250673A1 Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels |
| 02/23/1989 | DE3727223A1 Communication system for carrying out various special communication services |
| 02/22/1989 | EP0304213A2 NxN single-mode optical waveguide coupler |
| 02/22/1989 | EP0304065A1 Telecommunication system with a star net of light-wave connections |
| 02/22/1989 | EP0304064A2 Connection system with several stages |
| 02/22/1989 | EP0304043A2 Optical switch array provided with a mask having openings of a predetermined pattern and shutters corresponding to the pattern |
| 02/21/1989 | US4807281 Method for load distribution among the central processors of a multiprocessor central control unit of a switching system |
| 02/21/1989 | US4807280 Cross-connect switch |
| 02/21/1989 | US4807227 Optical wavelength-division switching system with coherent optical detection system |
| 02/21/1989 | US4807225 Telephone line carrier system |
| 02/15/1989 | EP0303093A2 Communication system provided with a connexion network constructed as a ring network in the subscriber area of a digital switching exchange |
| 02/14/1989 | US4805196 Line delay compensation for digital transmission systems utilizing low power line drivers |
| 02/14/1989 | US4805166 Switch path reservation arrangement |
| 02/14/1989 | US4805165 Time division multiplex data transmission method and apparatus |
| 02/14/1989 | US4804956 Rearrangeable digital signal space division switching system |
| 02/09/1989 | WO1989001277A1 Controlling key-system groups from a distributed control switching system |
| 02/07/1989 | USH586 ISDN D channel handler |
| 02/07/1989 | US4803721 DC control circuit |
| 02/07/1989 | US4803720 Dual plane cross point switch architecture for a micro-PBX |
| 01/31/1989 | US4802206 Calling system for enabling speech transmission from a caller to a called busy party in a telephone system |
| 01/31/1989 | US4802205 Circuit arrangement for telecommunications switching systems, particularly for telephone switching systems comprising information-processing sequential logic systems and traffic measuring devices |
| 01/31/1989 | US4802199 Method and apparatus for providing virtual facility communication service |
| 01/31/1989 | US4801936 Broadband signal switching apparatus |
| 01/31/1989 | CA1249648A1 Adaptive trunk-compression system with constant grade of service |
| 01/26/1989 | WO1989000711A1 Optical device arrays |
| 01/25/1989 | CN1030679A Communications system and components and methods for use therein |
| 01/24/1989 | US4800583 Overflow call handling system |
| 01/19/1989 | DE3722921A1 Method for a computer-controlled private telephone branch exchange, particularly for a key system, with the possibility of inserting an attention signal in the busy case |
| 01/18/1989 | EP0299784A2 Feature telephone integration device |
| 01/17/1989 | US4799255 Communication facilities access control arrangement |
| 01/17/1989 | US4798435 Optical switch circuit |