Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 12 - Data switching networks
Patents for H04L 12 - Data switching networks (448,999)
01/1986
01/15/1986EP0168265A2 Communications systems
01/15/1986EP0168258A2 Loop transmission system
01/15/1986EP0167590A1 Communication system having reconfigurable data terminals.
01/15/1986EP0167563A1 Time-slot interchanger for fast circuit switching
01/14/1986US4564940 Broad band network system
01/14/1986US4564838 Data communication network and method of communication
01/14/1986CA1199385A1 Content induced transaction overlap communication system
01/14/1986CA1199384A1 Information transmission system with modems coupled to a common communication medium
01/14/1986CA1199383A1 Method and apparatus for bus contention resolution
01/08/1986EP0167351A2 Signal multiplexing circuit
01/08/1986EP0167125A2 Method and circuit arrangement for statistically registering running exchange control operations in a communications exchange
01/08/1986EP0167124A2 Method and circuit arrangement for statistically registering the load of operating facilities belonging to a communications exchange
01/08/1986EP0166915A1 Communication system
01/08/1986EP0166892A1 TDMA print-to-multipoint communication system
01/08/1986EP0166765A1 Arrangement for routing data packets through a circuit switch.
01/07/1986US4563774 Address coded communication system
01/07/1986US4563681 Tone receiver for digital data communication systems
01/07/1986CA1199121A1 Communications interface
01/07/1986CA1199100A1 Data transmission systems for seismic streamers
01/02/1986EP0166441A2 Computer network
01/02/1986EP0166402A2 Input/output system for an industrial control system
01/02/1986EP0166193A2 Switch configured communication network
01/02/1986EP0165979A1 Reconfigurable collision avoiding system, station and protocol for a two path multiple access digital communications system
12/1985
12/31/1985US4562573 Method and apparatus for adjusting channel insertion timing
12/31/1985CA1198777A1 Fiber optic data highway
12/24/1985US4561118 Bus system with optical waveguides having collision detection
12/24/1985US4561092 Method and apparatus for data communications over local area and small area networks
12/24/1985US4561091 Data receiver
12/24/1985US4561090 Integrated self-checking packet switch node
12/24/1985US4561088 Communication system bypass architecture
12/24/1985US4560985 Dual-count, round-robin distributed arbitration technique for serial buses
12/24/1985US4560984 Method and apparatus for detecting the collision of data packets
12/24/1985CA1198522A1 Dual-count, round-robin distributed arbitration technique for serial buses
12/19/1985WO1985005746A1 Fiber optic communication module
12/19/1985WO1985005745A1 Data transmission method and apparatus
12/18/1985EP0165185A1 Method and system for transmitting messages between several stations of a local industrial decentralized network with a deterministic token passing access protocol
12/18/1985EP0164689A2 Circuit for receiving and/or transmitting serial binary signals on a plurality of lines in a processing device comprising a microcomputer or a microprocessor
12/18/1985EP0164611A2 Switching system and method for network having a plurality of terminal control equipment units
12/18/1985EP0164578A2 Storage method for grouped communications switching data
12/18/1985EP0164412A1 Upstream data packet time slot synchronization with downstream vbi for two-way catv system
12/18/1985EP0164406A1 Fast circuit switching system.
12/11/1985EP0164249A2 Communication network having gain adjustment function of a transmission amplifier of medium attachment unit
12/11/1985EP0164244A2 Local area networks
12/11/1985EP0164105A2 Circuit for receiving and/or transmitting serial binary signals in a processing device comprising a microcomputer or a microprocessor
12/11/1985EP0164000A2 A method and system for routing frames in a multi-ring local area network
12/11/1985EP0163999A2 A method for maintaining end-to-end integrity of data in a multi-ring local area network
12/11/1985EP0163921A1 Measurement data processing device
12/11/1985EP0078296B1 Arrangement for distribution of send permission to terminals in a telecommunciation network
12/10/1985US4558428 Data transmission system adapted to facilitate detection of safe receipt of a transmitted data frame by a receiving station
12/05/1985WO1985005519A1 Apparatus for interfacing with x21 equipment
12/04/1985EP0163577A2 Local area network for digital data processing system
12/04/1985EP0163157A1 Method for data exchange
12/03/1985US4556974 Method for passing a token in a local-area network
12/03/1985US4556972 Arrangement for routing data packets through a circuit switch
12/03/1985US4556881 In a communication system
11/1985
11/27/1985EP0162174A1 Buffer device used in a voice transmission network
11/27/1985EP0162173A1 Digital transmission system for a packetized voice
11/26/1985US4555781 Conversational video system having local network control
11/21/1985WO1985005241A1 Digital timeslot and signaling bus in a digital pbx switch
11/21/1985WO1985005238A1 Fault detection arrangement for a digital conferencing system
11/21/1985WO1985005237A1 Distributed packet switching arrangement
11/21/1985WO1985005236A1 Integrated packet switching and circuit switching system
11/21/1985EP0161836A1 Data communication network
11/21/1985EP0161825A2 A control mechanism for a ring communication system
11/19/1985US4554673 Sequential data transmission system with resynchronization
11/19/1985US4554659 Data communication network
11/19/1985US4554657 Multiplexed multiplex bus
11/19/1985US4554656 Method and system for controlling the interconnecting of a plurality of local data networks
11/19/1985US4554418 Information monitoring and notification method and apparatus
11/19/1985US4553493 Warship with standardized operating units
11/19/1985CA1196980A1 Data communication device including circuitry responsive to an overflow of an input packet buffer for causing a colision
11/19/1985CA1196977A1 Data transmission system via power supply line
11/19/1985CA1196976A1 Loop transmission system and method of controlling the loop-back condition thereof
11/12/1985US4553247 Telemetry system with signal booster for digital data transmission through a transmission line
11/12/1985US4553235 Apparatus for connecting digital terminals to a digital exchange
11/12/1985US4553234 Method and system of transmitting digital information in a transmission ring
11/12/1985US4553233 Multiple-ring communication system
11/12/1985US4553161 Upstream data packet time slot synchronization with downstream VBI for two-way CATV system
11/06/1985EP0160443A2 Packet and circuit switched communications network
11/06/1985EP0160300A2 Method and circuit arrangement for establishing connections and transmitting communication signals between subscriber's stations or line groups in a communications exchange, in particular a data exchange, having a loop arrangement
11/05/1985US4551833 Distributed monitoring of packet transmission delay
11/05/1985US4551831 Time division multiplexed system for non real time digital switching
11/05/1985US4551721 Method for initializing a token-passing local-area network
10/1985
10/30/1985EP0159929A2 Hybrid high speed data bus
10/29/1985US4550402 Data communication system
10/29/1985US4550401 Delivery information packet switching system
10/29/1985US4550397 Alternate paths in a self-routing packet switching network
10/29/1985US4550224 Method and apparatus for adding conferees to a conference
10/29/1985CA1196116A1 Distributed control system for multiple random access to the transmission line of a local network for speech and data
10/24/1985WO1985004776A1 Multiplexed interconnection of packet switching node packages
10/22/1985US4549292 Method of efficiently and simultaneously transmitting both isochronous and nonisochronous data in a computer network
10/22/1985US4549291 Hybrid local communication network, operating both in circuit and packet modes
10/22/1985CA1195750A1 Asynchronous data bus system
10/16/1985EP0158431A1 Local area network
10/16/1985EP0158364A2 Local area network
10/15/1985US4547879 Digital data transmission process and installation
10/15/1985US4547877 System for switching multirate digitized voice and data
10/15/1985US4547850 Priority control method and apparatus for common bus of data processing system
10/09/1985EP0157189A1 Method for the concentration in traffic of packetized information signals, especially in an ISDN switching exchange
10/09/1985EP0156907A1 Improved local area network configuration
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