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)
07/1985
07/17/1985EP0148191A1 Digital communications system
07/16/1985US4530093 PCM Telecommunications system for voice and data
07/16/1985US4530085 Reconfiguration control method for a loop-type data network
07/10/1985EP0147994A1 Reconfigurable collision avoiding system, station and protocol for a two path multiple access digital communications system
07/10/1985EP0147789A2 Communication network system
07/10/1985EP0147702A2 System and method for connecting a plurality of intelligent terminals to each other
07/10/1985EP0147677A2 Method of coding to minimize delay at a communication node
07/10/1985EP0147644A2 Token ring with secondary transmit opportunities
07/09/1985US4528675 FSK modem for bidirectional loop communications system
07/09/1985US4528663 Peak load access in a two-way CATV contention system
07/09/1985US4528661 Ring communications system
07/09/1985CA1190298A1 Method for resolving collision in local network
07/04/1985WO1985002965A1 Arrangement for routing data packets through a circuit switch
07/04/1985WO1985002964A1 Adaptive preferential flow control for packet switching system
07/04/1985WO1985002963A1 Communication system having reconfigurable data terminals
07/03/1985EP0147197A1 Arrangement for routing data packets through a circuit switch
07/03/1985EP0147160A1 Communication system having reconfigurable data terminals
07/03/1985EP0146966A2 Combined computer system
07/03/1985EP0146831A2 Message stripping protocol for a ring communication network
07/03/1985EP0105902B1 Synchronization apparatus in transmitting information on a simplex bus
07/02/1985US4527270 Communications network with stations that detect and automatically bypass faults
07/02/1985CA1189939A1 Digital telephone exchange comprising means for processing packet-switched data
07/02/1985CA1189927A1 Communication system
06/1985
06/26/1985EP0146293A1 Time-slot interchanger for fast circuit switching
06/26/1985EP0146292A1 Fast circuit switching system
06/26/1985EP0146275A2 Data signal switching systems
06/25/1985US4525845 Balanced circuit for connecting receiver and transmitter to transmission line
06/25/1985US4525837 Digital signal transmission system
06/25/1985US4525832 Digital signal transmission system
06/25/1985US4525830 Advanced network processor
06/25/1985US4525779 Conversational video system
06/20/1985WO1985002744A1 Peak load access in a two-way catv contention system
06/20/1985WO1985002742A1 Upstream data packet time slot synchronization with downstream vbi for two-way catv system
06/20/1985WO1985002737A1 Alternate paths in a self-routing packet switching network
06/20/1985WO1985002736A1 Fast circuit switching system
06/20/1985WO1985002735A1 Time-slot interchanger for fast circuit switching
06/19/1985EP0145437A2 Information transmission network
06/19/1985EP0145319A2 Input/output multiplexer-demultiplexer communications channel
06/19/1985EP0144953A2 Method of detecting recovery from fault in a data transmission system which effects loopback control
06/19/1985EP0144583A2 Method for the transmission of data determined by the duration of the existence of a connection
06/19/1985EP0144403A1 Method and device for the transfer of data in a data loop.
06/19/1985EP0144351A1 System for switching multirate digitized voice and data.
06/18/1985US4524440 Communications system
06/11/1985US4523192 Data processing network
06/06/1985EP0076844A4 Data processing system having dual-channel system bus.
06/05/1985EP0143255A2 Method and circuit arrangement for time-monitoring the seizure of signal converters
06/05/1985EP0143203A2 Digital telecommunication system with subscribers' loops in a star configuration
06/05/1985EP0143202A2 Digital telecommunication system with subscribers' loops in a star configuration
06/04/1985US4521891 Multiple channel data communication system
06/04/1985US4521882 Interface for accessing a wide-band bus handling speech and data traffic
06/04/1985US4521881 Data communication system with increased effective bandwidth
06/04/1985US4521880 Time-slot interchanger for fast circuit switching
05/1985
05/29/1985EP0142551A1 Variable bandwidth switching system
05/28/1985US4520479 Arrangement for re-arranging information for transmitting outgoing time-division multiplexed information obtained from incoming time-division multiplexed information
05/22/1985EP0141852A1 Integrated voice/data/control switching system
05/22/1985EP0070828B1 Improved autonomous terminal data communications system
05/21/1985US4519074 Transceiver having collision detection capability for contention-formatted FDM local area networks
05/21/1985US4519070 Method of initializing and recovering from failures in a local area network
05/21/1985US4519069 Communication system interconnecting radios and operators located at different positions
05/21/1985US4518960 Speed independent selector switch employing M-out-of-N codes
05/15/1985EP0141241A1 Method and apparatus to select a station within a group of stations communicating with a main station
05/14/1985US4517670 Preemptive bid communication system
05/14/1985US4517644 Symmetry type loop communication system
05/09/1985WO1985002078A1 Data transmission system and method
05/08/1985EP0140712A2 Data transmission system and method
05/08/1985EP0140609A2 Error isolator for bi-directional communications buses
05/08/1985EP0140475A1 Multiple access communication on a CATV reverse channel
05/08/1985EP0140077A2 Method for controlling access to the communications medium in a carrier sense multiple access system with collision avoidance
05/08/1985EP0139936A2 A method of detecting a hot carrier condition in a multiple access data communication network
05/08/1985EP0139916A2 Initialization in a multistation token pass communication system
05/07/1985US4516272 Communication network
05/07/1985US4516248 Variable threshold receiver
05/07/1985US4516240 Time division digital signal transmission system with block packing
05/07/1985US4516239 System, apparatus and method for controlling a multiple access data communications system including variable length data packets and fixed length collision-free voice packets
05/07/1985US4516238 Self-routing switching network
05/07/1985US4516236 Full-duplex transmission of bit streams serially and in bit-synchronism on a bus between two terminals.
05/07/1985US4516221 Data communication system
05/07/1985US4516216 In-service monitoring system for data communications network
05/07/1985US4516205 Access control of data transmission network
05/07/1985US4516204 Optical passive bus control system
05/07/1985US4516122 Communication system with collision detection and forced collision
05/07/1985CA1186767A1 Self-adjusting, distributed control, access method for a multiplexed single-signal data bus
05/02/1985EP0139069A2 Distributed processing system with fault diagnostic
05/02/1985EP0138952A1 A self-routing switching network.
05/02/1985EP0138951A1 A self routing steering network.
05/02/1985EP0138950A1 A distributed prioritized concentrator.
05/02/1985EP0138949A1 A wideband digital switching network.
04/1985
04/30/1985US4514843 Packet switched communication system comprising collision avoidance means
04/30/1985US4514841 Connecting unit for a ring bus
04/25/1985WO1985001850A1 Communication networks
04/25/1985WO1985001849A1 Asynchronous digital time multiplexing system with distributed bus
04/24/1985EP0138717A2 Asynchronous digital time-multiplex system with a distributed bus
04/24/1985EP0138135A2 Plant management system
04/24/1985EP0137804A1 Data network interface
04/23/1985US4513411 Transmission of status report of equipment in a digital transmission network
04/23/1985US4513370 Data transfer control system and method for a plurality of linked stations
04/17/1985EP0137438A2 Method for passing a token in a local-area network
04/17/1985EP0137437A2 Method for initializing a token-passing local-area network
04/17/1985EP0137225A1 Bidirectional communication system of a two-wire bus comprising an active terminator
04/16/1985US4512033 Remote level adjustment system for use in a multi-terminal communications system
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