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)
09/1983
09/15/1983WO1983003179A1 Multipoint data communication system with collision detection
09/15/1983WO1983003178A1 Improved multipoint data communication system with local arbitration
09/14/1983EP0088310A1 Method of determining the duration of the existence of a connection between subscriber stations of a data exchange
09/13/1983US4404557 Timed token ring with multiple priorities
09/07/1983EP0087760A1 Method of dispersing additional information in connection with information signals to be transmitted through a data exchange
09/07/1983EP0087664A1 Phase decoder for data communication systems
09/06/1983US4403322 Voice signal converting device
08/1983
08/31/1983EP0087252A2 Data transmission system
08/31/1983EP0087153A1 Digital signal multiplexer for high data rates
08/30/1983US4402082 Automatic line termination in distributed industrial process control system
08/24/1983EP0086577A1 Communication system
08/24/1983EP0086223A1 A local area communication network.
08/17/1983EP0085971A1 A special character sequence detection circuit arrangement
08/17/1983EP0085943A1 Method for the access control of subscriber stations from a data transmission apparatus to bus lines
08/16/1983US4399531 Distributed digital data communications network
08/10/1983EP0085437A2 Monitor for transmission line
08/10/1983EP0085198A1 Electronic apparatus with operation mode established by connecting bridges
08/10/1983EP0085130A1 Method and apparatus for maintaining the privacy of digital messages conveyed by public transmission
08/09/1983US4398298 Communication system having stations capable of detecting another station's
08/09/1983US4398289 Method for the transmission of data packets
08/09/1983US4398288 Loop type data highway system for data transmission
08/09/1983US4398271 Device for data transmission between seismic data acquisition devices and a recording device
08/03/1983EP0084883A1 Data transmission network
07/1983
07/26/1983US4395710 Bus access circuit for high speed digital data communication
07/26/1983CA1150865A1 Time division multiplex communication systems
07/26/1983CA1150793A1 Bus transmission system
07/20/1983EP0083602A1 Connecting unit for a ring bus
07/19/1983USRE31319 Digital data communication system
07/19/1983CA1150429A1 Time division digital switching installation for speech and data packet transmission lines
07/12/1983US4393497 Loop switching system
07/07/1983WO1983002317A1 War ship comprising standard functional installations
07/06/1983EP0082889A1 Method and arrangement for local address acquisition by a station in a communication system
07/05/1983US4392222 Combined circuit and packet switched system
06/1983
06/29/1983EP0082539A1 Warship with function units
06/29/1983EP0082200A1 Processor facilities for integrated packet and voice switching.
06/28/1983US4390990 Method for multiple signal collision detection on a transmission line
06/28/1983US4390984 Status check method for a data transmission system
06/28/1983US4390981 Microprocessor controlled message handling system
06/23/1983WO1983002210A1 Interconnection for local area contention networks
06/23/1983WO1983002206A1 A distributed control communications system
06/22/1983EP0081821A1 System of local area contention networks
06/21/1983US4389721 Time-division multiplex serial loop
06/21/1983US4389642 Digital matrix switching
06/17/1983EP0070828A4 Improved autonomous terminal data communications system.
06/15/1983EP0081335A1 Access control for communication networks
06/14/1983US4388725 Bus transmission system
06/14/1983US4388718 Digital telecommunication system
06/14/1983US4388489 Conversational video system
06/08/1983EP0080481A1 Method and device for the asynchronous series communication of the multipoint type between a plurality of logic transceivers.
06/07/1983US4387458 High capacity secure address loop network
06/07/1983US4387425 Masterless and contentionless computer network
06/07/1983US4387371 Data transmission systems
06/07/1983CA1147875A1 Packet transmission system with voice signal priority
06/01/1983EP0080232A1 Method of controlling the information traffic in a cell formed by a plurality of radio channels, and apparatus using this method
05/1983
05/26/1983WO1983001873A1 Telemetry system with signal booster for digital data transmission through a transmission line
05/25/1983EP0079706A1 Digital data transmissions with bit arbitration
05/25/1983EP0079426A1 Data communication system
05/18/1983EP0079150A1 Data communication system with increased effective bandwidth
05/17/1983US4384363 Transceiver for local network using carrier-sense multiple access/collision detection
05/17/1983CA1146669A1 Simulator for bit and byte synchronized data network
05/11/1983EP0078296A1 Arrangement for distribution of send permission to terminals in a telecommunciation network.
05/10/1983US4383316 Apparatus for and method of collating partitioned time disordered synchronous data streams
05/10/1983US4383315 Idle time slot seizure and transmission facilities for loop communication system
05/10/1983US4383314 Circular access linkage loop configuration for system communication
05/10/1983CA1146227A1 High impedance tap for tapped bus transmission systems
05/04/1983EP0078180A2 A communication system interconnecting radios and operators located at different positions
05/04/1983EP0077913A1 Signalling communication apparatus
05/03/1983US4382249 Apparatus and method for decoding information
04/1983
04/27/1983EP0077563A1 Process and apparatus for multiple random access to a transmission line in a local network for speech and data
04/26/1983CA1145417A1 Active t-coupler for fiber optic local networks which permits collision detection
04/20/1983EP0076880A1 A local area contention network data communication system
04/20/1983EP0076844A1 Data processing system having dual-channel system bus.
04/19/1983US4380761 Digital phase decoder with collision detection
04/14/1983WO1983001359A1 A local area contention network data communication system
04/14/1983WO1983001314A1 Conversation bus for a data processing system
04/13/1983EP0076586A1 A cascade monitoring apparatus
04/13/1983EP0076401A2 Self adjusting, distributed control, access method for a multiplexed single signal data bus
04/12/1983US4380088 Tester for collision-detect circuitry
04/12/1983US4380063 Flow control mechanism for block switching nodes
04/12/1983US4380061 Loop transmission system with improved bypass routing arrangement
04/12/1983US4379946 Signalling system and signal control equipment for multi-address calling
04/06/1983EP0075998A1 Digital telephone exchange comprising means for processing packet-switched data
04/06/1983EP0075729A2 Operating system in an integrated office for the communicative interaction of several office terminals with an electronic house-mail system
04/06/1983EP0075625A1 Conversation bus for a data processing system
04/05/1983US4379294 Data highway access control system
03/1983
03/23/1983EP0074865A2 Expandable and contractible local area network system
03/23/1983EP0074672A2 Asynchronous data bus system
03/15/1983USRE31182 Packet-switched data communication system
03/15/1983CA1143035A1 Automatic remote operate circuit
03/15/1983CA1143028A1 Industrial communications network
03/09/1983EP0073352A2 A data communication system
03/08/1983US4376278 Apparatus and method for collision avoidance
03/03/1983WO1983000788A1 A local area communication network
03/01/1983US4375691 Method and device for frequency translation
02/1983
02/22/1983US4375097 Transparent intelligent network for data and voice
02/22/1983CA1141838A1 Method and means for demand accessing and broadcast transmission among ports in a distributed star network
02/15/1983US4374436 System for the monitoring and restoration of series terminals in a looped communication system
02/09/1983EP0070828A1 Improved autonomous terminal data communications system.
02/08/1983US4373183 Bus interface units sharing a common bus using distributed control for allocation of the bus
02/08/1983CA1141014A1 Data transmission exchange
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