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)
07/1984
07/31/1984US4463351 System for providing several data terminals with access to a digital telephone line
07/31/1984US4463350 Communication system having designated transmission lines
07/24/1984US4462099 Error source excluding data transmission system
07/24/1984CA1171543A1 Industrial control system
07/19/1984WO1984002816A1 Activation of a transmission link by code sending
07/19/1984WO1984002815A1 Activation in a digital subscriber connection
07/18/1984EP0113639A1 Switching system for fixed-length synchronous packets
07/18/1984EP0113545A1 Packet error rate measurements by distributed controllers
07/17/1984US4460994 Loop communication system
07/17/1984CA1171165A1 Fail-safe catv system center facility
07/11/1984EP0113307A1 Alignment circuit for fixed-length digital information blocks
07/11/1984EP0113231A2 Data transmission system with modems coupled to a common communication medium
07/11/1984EP0113230A2 Data transmission system for a local network
07/11/1984EP0112952A1 Multipoint connection system for subscriber stations
07/10/1984US4459589 Data communication system
07/10/1984US4459588 Timed token protocol for local area networks
07/05/1984WO1984002629A1 Method and apparatus for bus contention resolution
07/04/1984EP0112426A1 Synchronizing system for a multiplexed loop communication network
07/04/1984EP0112340A1 End-to-end information memory arrangement in a line controller.
07/04/1984EP0112337A1 Fast packet switching system.
06/1984
06/27/1984EP0112126A2 Communication network and method for its use
06/27/1984EP0111850A1 Constant pressure intermittent fluid dispenser
06/26/1984US4456989 Signal transformation apparatus
06/26/1984CA1169974A1 Communication system for connecting a plurality of asynchronous data processing terminals
06/21/1984WO1984002439A1 Packet error rate measurements by distributed controllers
06/21/1984WO1984002438A1 Distributed time division multiplexing bus
06/20/1984EP0111332A2 Method for the detection of data collisions in an optical data bus
06/20/1984EP0111277A2 Loop network system controlled by a simple clock station
06/19/1984US4455650 System of beacons for the transmission of information
06/19/1984US4455647 Apparatus for establishing multi-address connections
06/13/1984EP0110691A2 System and method for controlling a multiple access data communications system
06/13/1984EP0110390A2 Collision avoidance circuit for packet switched communication system
06/13/1984EP0110015A2 Method for controlling the access of data transmission units to a common bus
06/13/1984EP0109973A1 Method and arrangement for the transmission of data among several computers
06/13/1984EP0109964A1 Synchronization in a communication network of interconnected rings
06/12/1984US4454601 Method and apparatus for communication of information and error checking
06/12/1984US4454508 Method of allocating bandwidth in a communication network
06/12/1984CA1169156A1 Apparatus for conforming the length of a data stream to a transmission line
06/07/1984WO1984002244A1 Method of transferring information via a digital telecommunication network and network for such transferring
06/07/1984WO1984002243A1 Speed independent selector switch employing m-out-of-n codes
06/07/1984WO1984002239A1 Speed independent arbiter switch employing m-out-of-n codes
06/05/1984US4453247 Speech packet switching method and device
06/05/1984US4453229 Bus interface unit
06/05/1984CA1168770A1 Idle time slot seizure and transmission facilities for loop communication system
05/1984
05/30/1984EP0109850A2 Speed independent selector switch employing M-out-of-N codes
05/30/1984EP0109849A2 Speed independent arbiter switch employing M-out-of-N codes
05/29/1984US4451827 Local area communication network
05/29/1984US4451697 Method for establishing connections between subscriber stations which operate with different transmission procedures by way of signal converters including busy-free control
05/29/1984CA1168392A1 Data transmission
05/29/1984CA1168310A1 Relay system for staged data transmission
05/23/1984EP0109287A2 Communication systems
05/22/1984US4450554 Asynchronous integrated voice and data communication system
05/16/1984EP0108692A1 Method and installation for digital data transmission
05/16/1984EP0108672A2 Content induced transaction overlap communication system
05/16/1984EP0108640A2 Optical network system of bus architecture capable of rapidly detecting collision at each communication station
05/16/1984EP0108555A2 Duplicated network arrays and control facilities for packet switching
05/16/1984EP0108554A1 Packet load monitoring by trunk controllers
05/16/1984EP0020636B1 Autonomous terminal data communication system
05/15/1984CA1167575A1 Time slot multiple circuit for the selective establishment of connections in a t.d.m. digital telecommunications system
05/10/1984WO1984001869A1 Packet load monitoring by trunk controllers
05/10/1984WO1984001868A1 Duplicated network arrays and control facilities for packet switching
05/10/1984WO1984001867A1 Method and apparatus for transmitting and receiving data messages
05/08/1984CA1167171A1 Communication system concentrator for connecting a plurality of asynchronous data processing terminals
05/02/1984EP0033337B1 Digital loop synchronization circuit
05/01/1984US4446564 Phase locked loop frequency synthesizer circuit and method for intercomputer communication on a local network of broadband RF modems
05/01/1984US4446555 Time division multiplex switching network for multiservice digital networks
05/01/1984US4446551 Data highway system with dual transmitting loop lines
05/01/1984US4446382 Arrangement to time separate bidirectional current flow
05/01/1984CA1166730A1 Bit-by-bit time-division digital switching network
04/1984
04/24/1984US4445222 Coupling circuit for transferring data signals at a high rate
04/24/1984US4445213 Communication line interface for controlling data information having differing transmission characteristics
04/24/1984US4445116 Method for allocating bandwidth between stations in a local area network
04/18/1984EP0105337A1 Data communication network and method of cummunication
04/12/1984WO1984001482A1 Cash flow monitoring system
04/04/1984EP0104991A1 Local hybrid communication network in circuit and packet modes with a time-multiplex loop
04/04/1984EP0104606A2 Method for the identification of a calling subscriber post by its line identification in a transit exchange of a telex and data exchange installation
04/04/1984EP0104605A2 Method for the identification of a calling subscriber post by its line identification in a transit exchange of a telex and data exchange installation
04/03/1984US4441162 Local network interface with control processor & DMA controller for coupling data processing stations to common serial communications medium
04/03/1984CA1164968A1 Multi-source/receiver data processing system comprising a communication bus
03/1984
03/29/1984WO1984001246A1 Bulk/interactive data switching system
03/27/1984US4439856 Bus communication system
03/27/1984US4439763 Collision avoiding system and protocol for a multiple access digital communications system
03/27/1984CA1164591A1 Communication system having an information bus
03/21/1984EP0103460A2 Improvements in or relating to data interconnecting networks
03/20/1984US4438520 System for regenerating a data word on a communications ring
03/20/1984US4438506 Message waiting light control system
03/20/1984CA1164065A1 Automatic shunt device
03/15/1984WO1984001071A1 Data conference system
03/15/1984WO1984001070A1 Transmission of status report of equipment in a digital transmissi on network
03/13/1984US4437190 Device for switching signals by optical means and automatic switching units comprising said device
03/13/1984US4437170 Method and circuit arrangement for the acceptance and temporary storage of data signals in a switching system
03/13/1984CA1192644B Dataset apparatus
03/13/1984CA1163691A1 Dataset apparatus
03/07/1984EP0102225A2 Improved communications interface
03/07/1984EP0102222A2 Loop transmission system and method of controlling its loop-back condition
03/07/1984EP0102059A2 Data transmission device for loop transmission system
03/06/1984US4435764 Computer network having a single electrically continuous bi-directional bus
03/06/1984US4435705 Data transmission systems
03/06/1984US4435704 Loop transmission system
03/01/1984WO1984000862A1 Digital signal transmission and receiving apparatus
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