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)
10/1989
10/05/1989DE3810367A1 Method for increasing the operational reliability of bus systems used for transmitting information in communication switching systems
10/04/1989EP0335848A1 Packet data switch for transferring data packets from one or a plurality of incoming data links to one or a plurality of outgoing data links
10/04/1989EP0335563A2 Distributed control rapid connection circuit switch and controlling method
10/04/1989EP0335562A2 Architecture and organization of a high performance metropolitan area telecommunications packet network
10/04/1989EP0335555A2 User to network interface protocol for packet communications networks
10/04/1989EP0334954A1 Layered network
10/04/1989CN1036089A Communications protocol for distributed station network
10/03/1989US4872197 Dynamically configurable communications network
10/03/1989US4872183 Data transmission apparatus with remote repeater
10/03/1989US4872165 Fault diagnostic distributed processing method and system
10/03/1989US4872163 Contention mechanism for communication networks
10/03/1989US4872162 Communication system
10/03/1989US4872161 Bus circuit for eliminating undesired voltage amplitude
10/03/1989US4872160 Integrated packetized voice and data switching system
10/03/1989US4872159 Packet network architecture for providing rapid response time
10/03/1989US4872158 Distributed control rapid connection circuit switch
10/03/1989US4872157 Architecture and organization of a high performance metropolitan area telecommunications packet network
10/03/1989US4872006 Data transmission system
09/1989
09/27/1989EP0334754A1 Automatic device for controlling remote means depending on communication link signalling
09/27/1989EP0334575A2 Local area network cabling arrangement
09/27/1989EP0334569A2 Method of and system for transmitting information
09/27/1989EP0334510A2 FDDI bit error rate tester
09/27/1989EP0334054A2 Node for a fast packet-switching network in optical-electrical technology
09/27/1989EP0333817A1 Adapter between coaxial cable and twisted pair cables
09/27/1989CN1035927A Method and device for exchanging with mixing-type groups
09/26/1989US4870641 Multichannel bandwidth allocation
09/26/1989US4870640 Data packet switching system for a transmission network
09/26/1989US4870639 Packet switching system
09/26/1989CA1261935A1 Vehicular data transfer communication system
09/26/1989CA1261493A1 Communication system having unified messaging
09/26/1989CA1261476A1 Methods of installing and assigning control processors in a distributed-control communications system
09/26/1989CA1261444A1 Burst-switching communications system
09/26/1989CA1261421A1 Communication system
09/26/1989CA1261087A1 Device for establishing a connection between a telecommunication network and a controllable system, such as a computer system, provided with an access control unit controllablevia a separate network terminal
09/26/1989CA1261083A1 Data transmission system
09/26/1989CA1261080A1 Satellite communications system with random multiple access and time slot reservation
09/26/1989CA1261022A1 Multiplex transmission system
09/26/1989CA1261021A1 Multiplex transmission system
09/26/1989CA1260636A1 Watch pager system and communication protocol
09/26/1989CA1260588A1 Method and apparatus for establishing a wideband communication facility through a communications network having narrow bandwidth channels
09/26/1989CA1260587A1 Multi-rate synchronous virtual circuit network for voice and data communications
09/26/1989CA1260586A1 Switching apparatus for burst-switching communications system
09/26/1989CA1260585A1 Link switch for a burst-switching communications system
09/26/1989CA1260584A1 Burst-switching method for an integrated communications system
09/26/1989CA1260581A1 Telecommunications interface
09/26/1989CA1260165A1 Data transmission system
09/26/1989CA1260124A1 Subscriber's line switching control system
09/26/1989CA1260123A1 High speed packet switching arrangement
09/26/1989CA1260103A1 High speed logic analyzer
09/20/1989EP0333615A2 Method of establishing transmission group numbers for network links
09/20/1989EP0333558A1 Testing device for a local area network with carrier sense access and collision detection (CSMA/CD)
09/20/1989EP0333269A1 Communication bus system, method and station for use in such a communication bus system
09/20/1989EP0333226A2 Packet switching device
09/20/1989EP0333225A2 Packet communication exchange including dummy packet transmission
09/20/1989EP0332818A2 Cellular telephone system with shared radio data channels
09/20/1989EP0332792A1 Data transmission system connectable to the telephone switched network
09/19/1989US4868866 Broadcast data distribution system
09/19/1989US4868816 Polling communication method
09/19/1989US4868814 Multilevel concurrent communications architecture for multiprocessor computer systems
09/19/1989US4868813 Packet concentrator and switch including a controller for assigning priorities to space switch input terminals for control of buffers
09/19/1989US4868811 Multiple access communication system
09/19/1989US4868809 Optical communication system
09/19/1989US4868758 Data communication system
09/19/1989CA1259701A1 Interconnecting system for memory terminals
09/19/1989CA1259682A1 Local area network
09/14/1989DE3807149A1 Method for identifying the occurrence of the same subscriber device address for a subscriber device in a ring-shaped communications network
09/14/1989DE3807148A1 Method for identifying the occurrence of the same subscriber device address for a subscriber device during the formation of an address table in a ring-shaped communications network
09/14/1989DE3806493A1 Bus system
09/13/1989EP0332286A2 Programmable protocol analyzer
09/13/1989EP0332197A2 A ring transmission system
09/13/1989EP0332097A2 Data bus for motor vehicles
09/12/1989US4866788 Process for controlling retransmission of messages from transmitting stations belonging to a cellular system
09/12/1989US4866772 Communication system
09/12/1989US4866757 Combined telephone and power distribution system
09/12/1989US4866709 Dynamic frame length communication system
09/12/1989US4866706 Token-passing local area network with improved throughput
09/12/1989US4866705 Data transmission system with means for distributing collision signals via the transmission line
09/12/1989US4866704 Fiber optic voice/data network
09/12/1989US4866702 Star topology local area network
09/12/1989US4866701 Packet switch with dynamic allocation of inputs
09/12/1989US4866421 Communications circuit having an interface for external address decoding
09/12/1989CA1259430A1 Multipoint communication system having polling and reservation schemes
09/12/1989CA1259419A1 Sound transmission method for data way system
09/08/1989WO1989008363A1 Telecommunication system for transmitting information between subscribers connected to a bus system
09/08/1989WO1989008362A1 Series control unit and method of control
09/08/1989WO1989008361A1 Data pick-up circuit for serial controller
09/08/1989WO1989008298A1 Passive data collection system for market research data
09/08/1989WO1989008295A1 Apparatus and network for transferring packets of electronic signals and associated method
09/07/1989DE3805976A1 Method and arrangement for storing telecommunications messages
09/06/1989EP0331442A2 Passive data collection system for market research data
09/06/1989EP0331205A2 Transmission system of a packet signal in a integrated network system using a frame format flexible for various forms of the integrated network system
09/06/1989EP0331190A2 Method for controlling address parameters for interconnecting LAN and ISDN
09/06/1989EP0331162A2 Functional mode information communication in a radio communication network
09/06/1989EP0330835A2 Method and apparatus for linking SNA terminals to an SNA host over a packet switched communications network
09/06/1989EP0330834A2 Method and apparatus for linking an SNA host to a remote SNA host over a packet switched communications network
09/06/1989EP0174998B1 Multiplexed interconnection of packet switching node packages
09/05/1989US4864589 Spread spectrum power line communications
09/05/1989US4864576 Local area network system
09/05/1989US4864564 Packet radio
09/05/1989US4864563 Method for establishing and maintaining a nodal network in a communication system
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