Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 3 - Selecting arrangements
Patents for H04Q 3 - Selecting arrangements (38,975)
10/1991
10/16/1991EP0451999A2 Matrix switcher apparatus
10/16/1991EP0451695A2 Method and apparatus for securing access to telecommunications based assets and services
10/16/1991EP0451693A2 Method and apparatus for providing integrated access to telecommunication based services
10/16/1991EP0451400A2 Method and apparatus for reconfiguring interconnections between switching system functional units
10/16/1991EP0451312A1 Switching device for broad-band signals
10/16/1991CN1014387B Path search in distributed control-exchange system
10/15/1991US5058152 Anonymous interactive telephone system having direct connect feature
10/15/1991US5058105 Network alternate routing arrangement
10/13/1991WO1991016796A1 Private telephone system with simplified command feature
10/13/1991CA2040194A1 Broadband signal switching equipment
10/09/1991EP0450884A2 A subscriber line interface circuit providing regulated current
10/09/1991EP0450610A2 Telecommunications voice and data services network architecture
10/09/1991EP0450550A2 Communication apparatus with electronic notebook and telephone exchange related to the same
10/09/1991EP0450045A1 Telephone system used for the distribution of advertising messages
10/08/1991US5056134 Audible logo for identifying a common carrier
10/08/1991US5055836 Wideband solid-state analog switch
10/03/1991WO1991015066A1 Distributed protocol for improving the survivability of telecommunications trunk networks
10/02/1991EP0449480A2 Real-time network routing
10/02/1991EP0449095A2 A controller for distributing loads among call processors
10/02/1991DE4010283A1 Electronic cross point switch - uses bipolar transistor pairs with inputs on bases and outputs on collectors
10/02/1991CN1014201B Processing sequence calls in distributed control switching system
10/01/1991US5054055 Telephone system and method for the intelligent use of individual calling line identification information
10/01/1991US5054054 Voice applications generator
10/01/1991US5054050 Drop testing in fiber to the home systems
10/01/1991CA1290045C Broadband signal switching equipment
10/01/1991CA1290044C Broadband signal switching equipment
09/1991
09/28/1991CA2034651A1 Distributed protocol for improving the survivability of telecommunications trunk networks
09/26/1991DE4009074A1 Operational data input into telecommunication exchanges or terminals - involves conversion between formats of data received or transmitted over wireless link to remote operation unit
09/25/1991EP0448076A2 Automatic personal search telephone system
09/25/1991EP0448020A1 Elementary switching unit for cross-connecting digital bit flows by time-multiplexing bit streams of different bit rates
09/25/1991EP0447935A2 Circuit arrangement for sending and receiving tone frequency signals on telephone lines
09/25/1991EP0447934A2 Method for entering switching related customer and operational data into communication exchanges and/or programmable communication terminals
09/25/1991EP0447485A1 System for cross-connecting high speed digital signals
09/25/1991EP0447461A1 Virtual tributary cross connect switch and switch network utilizing the same
09/24/1991US5051742 Queueing protocol
09/24/1991US5050951 Optical matrix switch with longitudinally configured switch elements
09/24/1991CA1289650C Time-division switching system
09/24/1991CA1289649C Method and apparatus for providing virtual facility communication service
09/18/1991EP0446908A2 High speed opto-electronic crossbar switch
09/18/1991EP0446589A2 ATM switch with copy capability
09/18/1991EP0446586A2 ATM-exchange
09/18/1991EP0446493A1 Routing logic means for a communication switching element
09/18/1991EP0446437A2 Optical matrix
09/17/1991US5050208 Relaying destination and designation system
09/17/1991US5049873 Communications network state and topology monitor
09/17/1991US5048910 Optical matrix switch for multiple input/output port configurations
09/14/1991WO1991014321A1 An optical multiplexer
09/14/1991CA2075293A1 Optical multiplexer
09/10/1991US5048081 Arrangement for routing packetized messages
09/10/1991US5048080 Control and interface apparatus for telephone systems
09/10/1991US5048075 Telephonic-interface statistical analysis system
09/10/1991US5047766 Broad band signal switching matrix
09/10/1991CA1288847C Call control of a distributed processing communications switching system
09/10/1991CA1288835C Line delay compensation for digital transmission systems utilizing low power line drivers
09/03/1991US5046181 Switching system with two-way line managing system
09/03/1991US5046088 Converter for in-band routing and/or origination information
08/1991
08/29/1991DE4039388A1 Key communication system with central computer control - has pair of associated terminals with mutual dependence for certain communication modes
08/29/1991DE4006048A1 Communication system interconnecting subscriber terminals - has terminal of one subscriber serviceable independently of state of terminal of other subscriber
08/28/1991EP0443583A2 Private branch exchange system
08/28/1991CN1054158A Synchronous-asynchronous converter
08/27/1991US5043980 Switching cell for packet switching network
08/27/1991US5043875 Communication system with information being exchanged among different partitions of a switching function and simultaneously blocking some partitions from receiving external stimuli
08/27/1991US5043725 Broadband signal switching equipment
08/27/1991US5043724 Broadband signal switching equipment
08/27/1991CA1288185C Apparatus for controlling key telephone station set in key telephone system
08/22/1991DE4005321A1 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
08/20/1991US5042064 Call control strategy for high capacity telecommunication services
08/20/1991US5042027 Communication network system and method of controlling a communication network
08/20/1991US5040864 Optical crosspoint switch module
08/20/1991CA1287932C Firmware state machine
08/20/1991CA1287910C Adjunct processor for providing computer facility access protection via call transfer
08/16/1991CA2034554A1 Method and apparatus for controlling a plurality of modems in a rack-mountable enclosure
08/14/1991CN1053852A Name resolution in a directory database
08/13/1991US5040174 Time division speech path apparatus
08/13/1991US5040173 Network control arrangement based on topological equivalence
08/13/1991US5040172 Communication method utilizing channel highway and digital communication apparatus for realizing the same
08/13/1991US5040170 System for cross-connecting high speed digital signals
08/13/1991US5040169 Wavelength division photonic switch
08/13/1991US5040158 Method for operating and maintaining a clock of a system
08/13/1991US5039993 Periodic array with a nearly ideal element pattern
08/13/1991CA1287679C Controlling key-system groups from a distributed control switching system
08/13/1991CA1287678C Circuitry for connecting multistage coupling fields and intermediate lines
08/08/1991WO1991011874A1 Single number information exchange routing process
08/08/1991DE4002862A1 Broadband PABX for video, audio and data communication - includes narrow band-broadband signalling adaptor modules and connection computer for control of broadband switch matrix
08/07/1991EP0440515A1 International authorization system
08/07/1991EP0440063A2 Broadband pabx
08/07/1991EP0439927A2 Enhanced privacy feature for telephone systems
08/07/1991CN1013467B Operating method of wideband/multislot switching apparatus
08/07/1991CN1013466B Digital key telephone system
08/06/1991US5038343 High speed digital packet switching system
08/06/1991US5038340 Exchange route decision system and method
08/06/1991US5037173 Optical interconnection network
08/06/1991CA1287391C Electro optical switch architectures
08/02/1991CA2035376A1 Broadband private automatic branch exchange
08/01/1991WO1991011872A1 Telecommunications line test system
08/01/1991DE4002455A1 TDM signal path connection network with permutation selection - incorporates switching elements clocked at controlled rate corresp. to permutations among input and output signal positions
08/01/1991CA2073764A1 Telecommunications line test system
07/1991
07/31/1991WO1991011888A1 Key telephone device
07/31/1991EP0438860A2 Arrangement for blocking or allowing telephone calls to predefined destinations
07/30/1991US5036512 Optical apparatus for combining light beam arrays having different wavelengths
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