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)
03/1991
03/27/1991EP0418865A2 Wireless signal transmission system with random access
03/27/1991EP0418813A2 Routing method and routing system for switching system having a plurality of paths
03/27/1991EP0418812A2 A packet communication system using a telephone switching network and a data flow control method
03/26/1991WO1991004641A1 Circuit arrangement with at least one input and one output for transmitting a signal which can be filtered, parallelized and digitized
03/26/1991US5003579 System for connecting computers via telephone lines
03/26/1991US5003578 Power-saving device for a cable-information receiving/transmitting apparatus
03/26/1991US5003538 Communication network and protocol for real-time control of mailing machine operations
03/26/1991US5003536 Communication system
03/26/1991US5003534 Link utilization control mechanism for demand assignment satellite communications network
03/26/1991US5003533 Node processing system
03/26/1991US5003531 Survivable network using reverse protection ring
03/26/1991US5003473 Trading ticket output system
03/26/1991US5003460 Method for the transmission of connection data stored in a communication switching system to a data processing system
03/26/1991US5003457 Simultaneous data and electric power transmitting/receiving system
03/26/1991CA1282179C Method for buffered serial peripheral interface (spi) in a serial data bus
03/26/1991CA1282152C Digital circuit- and packet-switching network and switching facility therefor
03/26/1991CA1282150C Packet switch
03/26/1991CA1282147C Data transfer control system
03/26/1991CA1282135C Remote test circuit for channel terminal
03/20/1991WO1991004623A1 Multiple access system for a communication network
03/20/1991EP0417943A2 Cell transfer apparatus and method using a variable rate codec
03/20/1991EP0417088A1 Communication system and switching element used therein.
03/20/1991EP0417083A1 Communication switching element.
03/19/1991US5001755 Security system network
03/19/1991US5001750 Secret communication control apparatus
03/19/1991US5001707 Method of providing reserved bandwidth in a dual bus system
03/19/1991US5001706 Packet cross connect switch system including improved throughput
03/19/1991US5001705 Protocol control circuit for data bus system
03/19/1991US5001704 Multipurpose bus interface
03/19/1991US5001702 Packet switching network for multiple packet types
03/19/1991US5001642 Motor vehicles
03/19/1991US5001472 Uneven token distribution technique for token based local area network
03/19/1991CA2025500A1 Message routing check system
03/16/1991WO1991004624A1 An asynchronous time division multiplex switching system
03/16/1991CA2042031A1 Asynchronous time division multiplex switching system
03/15/1991WO1991004621A1 Network control system
03/15/1991CA2042051A1 Network control system
03/13/1991EP0416942A2 Method of detecting a cable fault and switching to a redundant cable in a universal local area network
03/13/1991EP0416685A1 Method for monitoring, by means of a monitoring device, a downstream transmission medium containing a multiplicity of virtual, asynchronously time-shared transmission channels
03/13/1991EP0416291A2 Method for intermediate amplification of digital signals and intermediate repeater for digital signals
03/13/1991EP0416235A2 Data-communication method for loop-type network having portable slave stations connectable to addressable junction boxes permanently connected in the network
03/13/1991EP0415979A1 Communication system having a packet structure field.
03/13/1991EP0211849B1 Pager system and communication protocol
03/13/1991EP0138952B1 A self-routing switching network
03/13/1991CN1049945A Local area network architecture
03/12/1991WO1991003897A1 Channel access process for a local transmission system configured as a bus system
03/12/1991US4999839 Amplifier-oscillator free electron laser
03/12/1991US4999835 Method and device for asynchronous mode transmission putting microcells into use
03/12/1991US4999833 Network connectivity control by artificial intelligence
03/12/1991US4999832 Broadband multirate switching architecture
03/12/1991US4999829 Automatic fault recovery in a packet network
03/12/1991CA2041655A1 Channel access process for a local transmission system configured as a bus system
03/12/1991CA1281434C Serial communications controller
03/12/1991CA1281432C Multipoint link data-transmission control system
03/07/1991WO1991003117A1 Method and device for enhancement of digital signal transmission
03/07/1991WO1991003019A1 Method and apparatus for interactive computer conferencing
03/07/1991DE4023767A1 Controlling packets in wide area networks - using data fields to show number of links in data path and address of each port of intermittent nodes
03/07/1991DE3930040A1 Data transmission circuitry for digital communication network - uses digital telephone in conjunction with interface circuits to drive variety of terminals
03/07/1991DE3928537A1 Fault detection and location in data networks - using software based system to examine response signals within predetermined time
03/07/1991DE3546684C2 Operating communication bus network for processors
03/07/1991DE3546683C2 Operating communication bus network for processors
03/07/1991DE3546664C2 Operating communication bus network for processors
03/07/1991DE3546662C2 Operating communication bus network for processors
03/06/1991EP0415843A2 Delay-based congestion avoidance in computer networks
03/06/1991EP0415647A2 Local area network architecture
03/06/1991EP0415629A2 Interconnect fabric providing connectivity between an input and arbitrary output(s) of a group of outputs
03/06/1991EP0415628A2 A growable packet switch architecture
03/06/1991EP0415169A1 Method for data transmission
03/06/1991EP0415112A2 Cross-connection method for STM-1 signals of the synchronous-digital multiplexhierarchy
03/06/1991EP0414930A1 Method and circuit arrangement for preventing misrouting of data blocks received on incoming lines via a block exchange
03/05/1991US4998247 Active star-configured local area network
03/05/1991US4998246 Method for transmission of cyclic data
03/05/1991US4998245 Information transmission system having collective data transmission and collection devices
03/05/1991US4998244 High speed module interconnection bus
03/05/1991CA1281111C Wireless network for wideband indoor communications
03/05/1991CA1281077C Apparatus and method for providing a wireless link between two local area network systems
03/01/1991WO1991003898A1 No-owner frame and multiple token removal for token ring networks
03/01/1991CA2039730A1 No-owner frame and multiple token removal for token ring networks
03/01/1991CA2023553A1 Delay-based congestion avoidance in computer networks
02/1991
02/28/1991DE3927973A1 Data transmission system for process automation control - uses full duplex transmission for data transfer using frequency shift keying modulation
02/27/1991EP0414385A2 Communication apparatus for monitoring the amount of transmitted data
02/27/1991EP0413899A2 Packet switching system having bus matrix switch
02/27/1991EP0413759A1 A method and arrangement for channel monitor and control.
02/27/1991EP0413737A1 Security system network
02/27/1991EP0413698A1 Communication switching system.
02/26/1991US4996706 Method of controlling the electric power supplied to a modem
02/26/1991US4996685 Technique for dynamically changing an ISDN connection during a host session
02/26/1991US4996524 Address information registering/searching system in network system
02/21/1991WO1991002437A1 Improved packet routing switch
02/21/1991WO1991002420A1 Communication switching element and method for transmitting variable length cells
02/21/1991WO1991002419A1 Resequencing system for a switching node
02/21/1991DE3926845A1 Electrical bus system interface circuits - uses opto-electronic circuits powered externally to provide interface between bus and system circuits
02/20/1991EP0413537A2 Electronic mail message control system
02/20/1991EP0413512A2 Method and apparatus for generation of multi-branched diagnostic trees
02/20/1991EP0413488A2 Arrangement for regulating traffic in a high speed data network
02/20/1991EP0413369A1 A portable pager
02/20/1991EP0413286A2 Data synchronous transfer system using a fiber distributed data exchange interface
02/20/1991EP0413123A1 Method of transmitting data over an optical star network, and station and optical star network operating according to the same
02/20/1991EP0413066A1 Communications system
02/20/1991EP0413005A1 A method for shortening a distributed queue.
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