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)
07/1989
07/04/1989US4845504 Mobile radio network for nationwide communications
07/04/1989CA1257020A1 Method, station and system for the transmission of messages in the form of packets
07/04/1989CA1257006A1 Method and device for transmitting messages between stations through a broadcast local network
07/04/1989CA1256970A1 High-speed switching processor for a burst-switching communications system
06/1989
06/29/1989WO1989006083A1 Data transmission system
06/28/1989EP0322117A2 Multiprocessor digital data processing system
06/28/1989EP0322116A2 Interconnect system for multiprocessor structure
06/28/1989EP0322105A2 Method of appending a reply in an electronic information system
06/28/1989EP0322075A2 Switching network and controller for a switching system
06/28/1989EP0322029A1 Device for transforming data-packets into a regular multiplex in a TDMA transmission system
06/28/1989EP0321976A2 Polling type communication system and communication method therefor
06/28/1989EP0321907A2 Duplex system of transmission lines in a loop network
06/28/1989EP0321672A2 Transmission trunked radio system with voice buffering and off-line dialing
06/27/1989US4843606 Local area communication system for integrated services based on a token-ring transmission medium
06/27/1989US4843605 Node apparatus for communication network having multi-conjunction architecture
06/27/1989CA1256610A1 Method of secured communications in a telecommunications system
06/27/1989CA1256540A1 Methods of establishing and terminating connections in a distributed-control communications system
06/27/1989CA1256539A1 High speed queue sequencer for a burst-switching communications system
06/22/1989DE3840570A1 Data transmission system for programmable control units
06/21/1989EP0321454A2 A method of operating a multiple access communications system
06/21/1989EP0321203A2 Broadcast transmission system over a bus communication network
06/21/1989EP0321050A2 Switching node of a broad-band switching system
06/21/1989EP0320870A2 Communication device
06/21/1989EP0320772A2 Method of hybrid packet switching and devices therefor
06/21/1989EP0320714A2 Packet-switching devices
06/21/1989EP0244443A4 Communication network for multiprocessor packet communication.
06/20/1989US4841550 Universal null DTE
06/20/1989US4841527 Stabilization of random access packet CDMA networks
06/20/1989US4841523 Method of accessing local area networks with a unidirectional ring-transmission line, and local area network using this method
06/20/1989US4841437 System architecture for a test apparatus having primary and dependent processors
06/20/1989US4841295 Local area network with biasing arrangement for facilitating access contention between work stations connected to a common bus
06/15/1989WO1989005551A1 Method and apparatus for automatic loading of a data set in a node of a communication network
06/14/1989EP0319998A2 System for carrying out connection management control of ring network
06/14/1989EP0319820A1 Data-processing system
06/13/1989US4839891 Method for controlling data flow
06/13/1989US4839887 Node apparatus for communication network having multi-conjunction architecture
06/13/1989US4839886 Star configured local area network having priority allocation
06/13/1989US4839885 Star configured local area network
06/13/1989US4839643 Broadband signal switching equipment
06/07/1989EP0319271A2 Multiplex transmission system
06/07/1989EP0319270A2 Multiplex transmission system
06/07/1989EP0319235A2 Communication and energy control system for houses
06/07/1989EP0318643A2 Communication control system
06/07/1989EP0318531A1 Packet switching
06/07/1989CN1033343A Hybrid time multiplex switching system with optimized buffer memory
06/06/1989US4837856 Fault-tolerant fiber optic coupler/repeater for use in high speed data transmission and the like
06/06/1989US4837805 Opening command transmission system and method capable of reducing overhead in an information processing unit
06/06/1989US4837798 Communication system having unified messaging
06/06/1989US4837797 Electronic message unit and methods using same
06/06/1989US4837788 Repeater for extending local area networks
06/06/1989US4837762 Data transmission control method and apparatus
06/06/1989US4837761 Header driven type packet switching system
06/06/1989US4836317 Method for distributing current address tables in "n" ring-shaped networks
06/01/1989WO1989005078A1 Optical communications network
06/01/1989WO1989005077A1 Optical communications network
06/01/1989WO1989005076A2 Apparatus and method for a secure and diagnosable antijabber communication circuit
06/01/1989WO1989005075A1 Fast packetized data delivery for digital networks
06/01/1989WO1989005070A1 Optical communications network
06/01/1989WO1989005069A1 Optical communications network
06/01/1989WO1989003566A3 Layered network
05/1989
05/31/1989EP0318335A1 Fault location in optical communications networks
05/31/1989EP0318333A1 Stations for a digital communications network
05/31/1989EP0318332A1 Synchronisation of digital communications network
05/31/1989EP0318331A1 Scrambling in a digital communications network
05/31/1989EP0317931A1 Control unit for an asynchronous time-division multiplex data switching unit
05/31/1989EP0317930A2 Switching apparatus for data transmitted by the asynchronous time-division multiplex method
05/30/1989US4835776 Communication filter
05/30/1989US4835763 Survivable ring network
05/30/1989US4835709 Assembly modeling process
05/30/1989CA1255024A1 Bus system
05/30/1989CA1255007A2 Universal protocol data receiver
05/30/1989CA1255006A1 Data transmission system
05/30/1989CA1254985A1 Broadcast packet switching network
05/30/1989CA1254984A1 Interconnection of broadcast networks
05/30/1989CA1254981A1 Communications switching system
05/30/1989CA1254978A1 Digital communication network architecture for providing universal information services
05/30/1989CA1254948A1 Wideband switching system
05/24/1989EP0317170A2 Interprocessor switching network
05/24/1989EP0316536A2 Terminal unit in information transmission system
05/24/1989DE3738800A1 Data transmission system
05/23/1989US4833543 Image processing system and phaselocked loop used therein
05/23/1989US4833468 Layered network
05/23/1989US4832434 Network comprising a multitude of optical signal transmission lines connectible to one another via optical mixers
05/23/1989CA1254664A1 Local area network processing system
05/23/1989CA1254641A1 Nonblocking self-routing packet and circuit switching network
05/23/1989CA1254640A1 Switching system having multiple parallel switching networks
05/23/1989CA1254638A1 Reconfigurable high-speed integrated local network
05/18/1989WO1989004578A1 Network and intelligent cell for providing sensing, bidirectional communications and control
05/18/1989WO1989004571A1 Series controller
05/18/1989WO1989004516A1 An input/output section for an intelligent cell which provides sensing, bidirectional communications and control
05/17/1989EP0315919A1 Switching node for switching data signals carried in data packets
05/17/1989EP0315918A1 Switching node for switching data signals carried in data packets
05/16/1989US4831620 Controller for controlling multiple LAN types
05/11/1989DE3736468A1 Method for priority-controlled access and arrangement for carrying out the method
05/10/1989EP0315549A2 Protocol control circuit for data bus system
05/10/1989EP0315158A2 Method and apparatus for controlling terminals on communication network
05/09/1989US4829516 System structure recognition method for a multiloop transmission system
05/09/1989US4829297 Communication network polling technique
05/09/1989US4829227 High speed data link
05/09/1989CA1253936A1 Digital network system having arrangement for testing digital subscriber line
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