Patents for H04Q 3 - Selecting arrangements (38,975) |
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10/16/1991 | EP0451999A2 Matrix switcher apparatus |
10/16/1991 | EP0451695A2 Method and apparatus for securing access to telecommunications based assets and services |
10/16/1991 | EP0451693A2 Method and apparatus for providing integrated access to telecommunication based services |
10/16/1991 | EP0451400A2 Method and apparatus for reconfiguring interconnections between switching system functional units |
10/16/1991 | EP0451312A1 Switching device for broad-band signals |
10/16/1991 | CN1014387B Path search in distributed control-exchange system |
10/15/1991 | US5058152 Anonymous interactive telephone system having direct connect feature |
10/15/1991 | US5058105 Network alternate routing arrangement |
10/13/1991 | WO1991016796A1 Private telephone system with simplified command feature |
10/13/1991 | CA2040194A1 Broadband signal switching equipment |
10/09/1991 | EP0450884A2 A subscriber line interface circuit providing regulated current |
10/09/1991 | EP0450610A2 Telecommunications voice and data services network architecture |
10/09/1991 | EP0450550A2 Communication apparatus with electronic notebook and telephone exchange related to the same |
10/09/1991 | EP0450045A1 Telephone system used for the distribution of advertising messages |
10/08/1991 | US5056134 Audible logo for identifying a common carrier |
10/08/1991 | US5055836 Wideband solid-state analog switch |
10/03/1991 | WO1991015066A1 Distributed protocol for improving the survivability of telecommunications trunk networks |
10/02/1991 | EP0449480A2 Real-time network routing |
10/02/1991 | EP0449095A2 A controller for distributing loads among call processors |
10/02/1991 | DE4010283A1 Electronic cross point switch - uses bipolar transistor pairs with inputs on bases and outputs on collectors |
10/02/1991 | CN1014201B Processing sequence calls in distributed control switching system |
10/01/1991 | US5054055 Telephone system and method for the intelligent use of individual calling line identification information |
10/01/1991 | US5054054 Voice applications generator |
10/01/1991 | US5054050 Drop testing in fiber to the home systems |
10/01/1991 | CA1290045C Broadband signal switching equipment |
10/01/1991 | CA1290044C Broadband signal switching equipment |
09/28/1991 | CA2034651A1 Distributed protocol for improving the survivability of telecommunications trunk networks |
09/26/1991 | DE4009074A1 Operational data input into telecommunication exchanges or terminals - involves conversion between formats of data received or transmitted over wireless link to remote operation unit |
09/25/1991 | EP0448076A2 Automatic personal search telephone system |
09/25/1991 | EP0448020A1 Elementary switching unit for cross-connecting digital bit flows by time-multiplexing bit streams of different bit rates |
09/25/1991 | EP0447935A2 Circuit arrangement for sending and receiving tone frequency signals on telephone lines |
09/25/1991 | EP0447934A2 Method for entering switching related customer and operational data into communication exchanges and/or programmable communication terminals |
09/25/1991 | EP0447485A1 System for cross-connecting high speed digital signals |
09/25/1991 | EP0447461A1 Virtual tributary cross connect switch and switch network utilizing the same |
09/24/1991 | US5051742 Queueing protocol |
09/24/1991 | US5050951 Optical matrix switch with longitudinally configured switch elements |
09/24/1991 | CA1289650C Time-division switching system |
09/24/1991 | CA1289649C Method and apparatus for providing virtual facility communication service |
09/18/1991 | EP0446908A2 High speed opto-electronic crossbar switch |
09/18/1991 | EP0446589A2 ATM switch with copy capability |
09/18/1991 | EP0446586A2 ATM-exchange |
09/18/1991 | EP0446493A1 Routing logic means for a communication switching element |
09/18/1991 | EP0446437A2 Optical matrix |
09/17/1991 | US5050208 Relaying destination and designation system |
09/17/1991 | US5049873 Communications network state and topology monitor |
09/17/1991 | US5048910 Optical matrix switch for multiple input/output port configurations |
09/14/1991 | WO1991014321A1 An optical multiplexer |
09/14/1991 | CA2075293A1 Optical multiplexer |
09/10/1991 | US5048081 Arrangement for routing packetized messages |
09/10/1991 | US5048080 Control and interface apparatus for telephone systems |
09/10/1991 | US5048075 Telephonic-interface statistical analysis system |
09/10/1991 | US5047766 Broad band signal switching matrix |
09/10/1991 | CA1288847C Call control of a distributed processing communications switching system |
09/10/1991 | CA1288835C Line delay compensation for digital transmission systems utilizing low power line drivers |
09/03/1991 | US5046181 Switching system with two-way line managing system |
09/03/1991 | US5046088 Converter for in-band routing and/or origination information |
08/29/1991 | DE4039388A1 Key communication system with central computer control - has pair of associated terminals with mutual dependence for certain communication modes |
08/29/1991 | DE4006048A1 Communication system interconnecting subscriber terminals - has terminal of one subscriber serviceable independently of state of terminal of other subscriber |
08/28/1991 | EP0443583A2 Private branch exchange system |
08/28/1991 | CN1054158A Synchronous-asynchronous converter |
08/27/1991 | US5043980 Switching cell for packet switching network |
08/27/1991 | US5043875 Communication system with information being exchanged among different partitions of a switching function and simultaneously blocking some partitions from receiving external stimuli |
08/27/1991 | US5043725 Broadband signal switching equipment |
08/27/1991 | US5043724 Broadband signal switching equipment |
08/27/1991 | CA1288185C Apparatus for controlling key telephone station set in key telephone system |
08/22/1991 | DE4005321A1 Fault tolerant computer system - has working memories in redundant computers divided into high-cost, fail-safe regions and low-cost regions for active and inactive data |
08/20/1991 | US5042064 Call control strategy for high capacity telecommunication services |
08/20/1991 | US5042027 Communication network system and method of controlling a communication network |
08/20/1991 | US5040864 Optical crosspoint switch module |
08/20/1991 | CA1287932C Firmware state machine |
08/20/1991 | CA1287910C Adjunct processor for providing computer facility access protection via call transfer |
08/16/1991 | CA2034554A1 Method and apparatus for controlling a plurality of modems in a rack-mountable enclosure |
08/14/1991 | CN1053852A Name resolution in a directory database |
08/13/1991 | US5040174 Time division speech path apparatus |
08/13/1991 | US5040173 Network control arrangement based on topological equivalence |
08/13/1991 | US5040172 Communication method utilizing channel highway and digital communication apparatus for realizing the same |
08/13/1991 | US5040170 System for cross-connecting high speed digital signals |
08/13/1991 | US5040169 Wavelength division photonic switch |
08/13/1991 | US5040158 Method for operating and maintaining a clock of a system |
08/13/1991 | US5039993 Periodic array with a nearly ideal element pattern |
08/13/1991 | CA1287679C Controlling key-system groups from a distributed control switching system |
08/13/1991 | CA1287678C Circuitry for connecting multistage coupling fields and intermediate lines |
08/08/1991 | WO1991011874A1 Single number information exchange routing process |
08/08/1991 | DE4002862A1 Broadband PABX for video, audio and data communication - includes narrow band-broadband signalling adaptor modules and connection computer for control of broadband switch matrix |
08/07/1991 | EP0440515A1 International authorization system |
08/07/1991 | EP0440063A2 Broadband pabx |
08/07/1991 | EP0439927A2 Enhanced privacy feature for telephone systems |
08/07/1991 | CN1013467B Operating method of wideband/multislot switching apparatus |
08/07/1991 | CN1013466B Digital key telephone system |
08/06/1991 | US5038343 High speed digital packet switching system |
08/06/1991 | US5038340 Exchange route decision system and method |
08/06/1991 | US5037173 Optical interconnection network |
08/06/1991 | CA1287391C Electro optical switch architectures |
08/02/1991 | CA2035376A1 Broadband private automatic branch exchange |
08/01/1991 | WO1991011872A1 Telecommunications line test system |
08/01/1991 | DE4002455A1 TDM signal path connection network with permutation selection - incorporates switching elements clocked at controlled rate corresp. to permutations among input and output signal positions |
08/01/1991 | CA2073764A1 Telecommunications line test system |
07/31/1991 | WO1991011888A1 Key telephone device |
07/31/1991 | EP0438860A2 Arrangement for blocking or allowing telephone calls to predefined destinations |
07/30/1991 | US5036512 Optical apparatus for combining light beam arrays having different wavelengths |