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)
06/1990
06/27/1990EP0374212A1 Multiple access communications system
06/27/1990EP0237580B1 Packet switching system
06/27/1990EP0203111B1 Distributed packet switching system
06/27/1990CN1043415A Packet-switching exchange and input converter unit therefor
06/26/1990US4937825 Method and apparatus for diagnosing problems in data communication networks
06/26/1990US4937823 Ring network configuration
06/26/1990US4937819 Time orthogonal multiple virtual dce for use in analog and digital networks
06/26/1990US4937817 Packet selection for packet distribution arrangements
06/26/1990US4937816 Single-channel communication bus system and station for use in such a communication bus system
06/26/1990US4937814 Junction switch for packet switching
06/26/1990US4937811 Communication network
06/26/1990US4937464 Modular jack with loop testing switch
06/26/1990CA1270960A1 Non coded information and companion data switching mechanism
06/26/1990CA1270959A1 Coupling discriminator
06/20/1990EP0374134A2 Local area network for digital data processing system
06/20/1990EP0374133A2 Local area network for digital data processing system
06/20/1990EP0374132A2 Local area network for digital data processing system
06/20/1990EP0374131A2 Local area network for digital data processing system
06/20/1990EP0373970A2 Flexible billing rate for mail communication systems
06/20/1990EP0373278A1 Remote power on control device
06/20/1990EP0373228A1 Communication network having an adaptive routing system
06/20/1990CN1008500B Circuit for restricting transient tremble in exchange duration
06/19/1990US4935954 Automated message retrieval system
06/19/1990US4935926 Networking circuitry
06/19/1990US4935925 Adaptive digital network interface
06/19/1990US4935922 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
06/19/1990CA1270570A1 Real-time end of packet signal generator
06/13/1990EP0372801A2 A method and apparatus for configuring data paths within a network station
06/13/1990EP0372795A2 Bandwidth allocation and congestion control scheme for an integrated voice and data network
06/13/1990EP0372765A2 Methods and apparatus for performing restricted token operations on an FDDI network
06/13/1990EP0372567A2 Polling communication system with priority control
06/13/1990EP0372283A2 Packet communication exchange and input conversion unit therefor
06/13/1990EP0201590B1 Lockup detection and recovery in a packet switching network
06/13/1990CN1043057A Flexible interconnection system of electronic equipment
06/13/1990CN1043052A Communication switching element
06/12/1990US4933938 Group address translation through a network bridge
06/12/1990US4933937 Network adapter for connecting local area network to backbone network
06/12/1990US4933936 Distributed computing system with dual independent communications paths between computers and employing split tokens
06/12/1990US4933935 Communications systems
06/12/1990US4933933 Torus routing chip
06/12/1990US4933932 Buffer queue write pointer control circuit notably for self-channelling packet time-division switching system
06/12/1990US4933931 Integrated accounting system
06/12/1990CA2005055A1 Self-healing device of an annular link
06/12/1990CA1270304A1 Cordless accessed high-speed high-capacity local area networks
06/06/1990EP0371609A2 Electronic mail systems
06/06/1990EP0371608A2 Network object monitoring
06/06/1990EP0371607A2 Electronic mail systems
06/06/1990EP0371605A2 Electronic mail systems
06/06/1990CN1008317B Ring transmission system with changeable order of station
06/05/1990US4932025 Method of information transfer as well as an arrangement for implementing the method
06/05/1990US4932023 Frame stripping protocol for early token release in a ring communication network
06/05/1990US4932020 Packet switching arrangement including packet retransmission
06/05/1990US4931791 Shorted-coaxial-cable detector for local-area networks
06/02/1990CA2002999A1 Packet-switching exchange and input converter unit therefor
05/1990
05/31/1990WO1990006028A1 Lan with interoperative multiple operational capabilities
05/31/1990WO1990006027A1 Lan with dynamically selectable multiple operational capabilities
05/31/1990DE3939626A1 Electronic mail system - has terminal with memory having main text area that cannot be manipulated
05/31/1990DE3840306A1 Method for text communication between terminals, in particular telephone terminals, connected to communications switching systems
05/30/1990EP0370845A1 Ring network with a spare loop
05/30/1990EP0370568A1 Method and system for transmitting buffered data packets on a communications network
05/30/1990EP0370510A2 Broad band digital exchange
05/30/1990EP0222828B1 Agent communication method for telecommunication systems
05/29/1990US4930159 Method of disposal
05/29/1990US4930124 Decentralized and synchronous data transmission process and network
05/29/1990US4930123 Method for controlling address parameters for interconnecting lan and ISDN
05/29/1990US4930122 Message transfer system and method
05/29/1990US4930121 Network system using token-passing bus with multiple priority levels
05/29/1990US4930119 Duplex system of transmission lines in a loop network
05/29/1990US4930103 Data transmission method in a digital transmission network and apparatus for implimenting same
05/29/1990US4929939 High-speed switching system with flexible protocol capability
05/29/1990CA1269770A1 Communications systems
05/25/1990CA2003259A1 Broad band digital exchange
05/23/1990EP0369996A2 Interconnection system for memory terminals
05/23/1990EP0369833A1 Access unit to a transmission medium of a local area network
05/23/1990EP0369802A2 Network system
05/23/1990EP0369382A2 Home-bus-information system
05/23/1990EP0369276A1 System for real time exchange of messages between stations connected by a closed-loop, especially between stations of a telecommunication exchange
05/23/1990EP0369146A2 Multipath hierarchical network
05/23/1990EP0368970A1 Multiple-access communications system
05/23/1990DE3836773A1 Network access circuit
05/23/1990CN1042460A Satellite radio receiver
05/22/1990US4928097 Real time process control using multiple communication networks
05/22/1990CA1269438A1 Packet data communication system with ring type transmission line
05/22/1990CA1269437A1 Circuit arrangement for pcm telecommunication facilities
05/17/1990WO1990005422A2 Digital image processing and display system
05/17/1990WO1990005420A1 A process and device for the decentralised transmission of information on a transfer path
05/17/1990WO1990005419A1 Distributed router of connectionless packets over connection oriented networks
05/17/1990WO1990005416A1 Statistical measurement equipment and telecommunication system using same
05/17/1990WO1990005410A1 Satellite radio receiver
05/17/1990WO1990005336A1 Guaranteed reliable broadcast network
05/16/1990EP0368683A2 Data handling apparatus
05/16/1990EP0368569A2 Packet switching network
05/16/1990EP0368465A1 Improvements relating to data transmission systems
05/16/1990EP0367830A1 Series control unit and method of control
05/16/1990CN1042286A Time division switch
05/15/1990US4926420 Transmission system of a packet signal in an integrated network system using a frame format flexible for various forms of the integrated network system
05/15/1990US4926418 Fairness algorithm for full-duplex buffer insertion ring
05/15/1990US4926416 Method and facilities for hybrid packet switching
05/15/1990US4926415 Local area network system for efficiently transferring messages of different sizes
05/15/1990US4926375 Multiple nodes broadcast communication method with receiver identification by bit position in transferred massage
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