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)
10/1985
10/08/1985US4546467 Monitor for transmission line
10/08/1985US4546429 Interactive communication channel
10/08/1985US4546213 Modem security device
10/08/1985CA1195016A1 Synchronization apparatus in transmitting information on a simplex bus
10/08/1985CA1195008A1 Method of, and a terminal for, transmitting bytes to a bus
10/08/1985CA1194959A1 Bidirectional dual network
10/08/1985CA1194954A1 Data transmission system
10/02/1985EP0156580A2 Data transmission system
10/02/1985EP0156557A2 Transceiver for multi-drop local area networks
10/02/1985EP0156542A2 Interconnection of communications networks
10/02/1985EP0082200B1 Processor facilities for integrated packet and voice switching
10/01/1985US4545077 Electro-optical data bus
10/01/1985US4545013 Enhanced communications network testing and control system
10/01/1985US4545011 Enhanced communications network testing and control system
10/01/1985CA1194574A1 Two-wire bus-system comprising a clock wire and a data wire for interconnecting a number of stations
10/01/1985CA1194572A1 Apparatus for connecting digital terminals to a digital exchange
10/01/1985CA1194571A1 Error source excluding data transmission system
09/1985
09/26/1985WO1985004302A1 Remote subscriber interaction system
09/24/1985US4543654 Interfacing a communication network
09/24/1985US4543574 System for resolving collision in local network
09/24/1985CA1194175A1 Fault tolerant, self-powered data reporting system
09/24/1985CA1194173A1 Communication system and station suitable therefor
09/18/1985EP0155025A1 Digital switching network for switching signals of different bit rates
09/17/1985US4542502 Reconfigurable collision avoiding system, station and protocol for a two path multiple access digital communications system
09/17/1985US4542499 Distributed control system for multiple random access to the transmission line of a local network for speech and data
09/17/1985US4542498 High bit-rate coupler between a PCM channel multiplex and a packet switching unit
09/17/1985US4542497 Wideband digital switching network
09/17/1985US4542496 Loop transmission system and method of controlling the loop-back condition thereof
09/17/1985CA1193703A1 Interface facility for a packet switching system
09/17/1985CA1193702A1 End-to-end information memory arrangement in a line controller
09/17/1985CA1193692A1 Collision avoiding system and protocol for a two path multiple access digital communications system
09/17/1985CA1193691A1 Multiple access data communication system control
09/17/1985CA1193690A1 Multipoint data communication system with collision detection
09/12/1985WO1985003395A3 Digital data transmission method, network and module for implementing such method
09/10/1985US4541044 Loop transmission with back-up power supply for the interface
09/04/1985EP0153838A2 Method of efficiently and simultaneously transmitting both isochronous and nonisochronous data in a computer network
09/03/1985US4539679 Synchronization in a communication network of interconnected rings
09/03/1985US4539678 Synchronization system for a closed-loop multiplex communication network
09/03/1985US4539677 Multiple access data communication system
09/03/1985US4539676 Bulk/interactive data switching system
08/1985
08/29/1985WO1985003829A1 Method of inserting and removing isochronous data into a sequence of nonisochronous data characters without slot allocation on a computer network
08/29/1985WO1985003827A1 Method of efficiently and simultaneously transmitting both isochronous and nonisochronous data in a computer network
08/29/1985WO1985003826A1 Multipriority communication system
08/29/1985WO1985003825A1 Alternating communication channel switchover system
08/29/1985WO1985003770A1 Method and apparatus for detecting the collision of data packets
08/28/1985EP0153179A2 Method of inserting and removing isochronous data into a sequence of nonisochronous data characters without slot allocation on a computer network
08/28/1985EP0152407A1 Communication network.
08/27/1985US4538264 Self-repairing ring communications network
08/27/1985US4538263 Variable-band switching system for voice and data communication
08/27/1985US4538262 Multiplex bus system for controlling the transmission of data between a master control unit and a plurality of remotely located receiver-transmitter units
08/27/1985US4538261 In a communication network
08/27/1985US4538259 In a communication system
08/27/1985US4538147 Bandwidth allocation in a token controlled loop communications network
08/27/1985US4538026 Loop back system for loop transmission line
08/27/1985CA1192634A1 Coupling an electrical signal to transmission lines
08/21/1985EP0152088A2 Communication system by-pass architecture
08/21/1985EP0152013A2 Synchronous/asynchronous communication system
08/21/1985EP0151837A1 System and method for communication between nodes of a closed loop local communication path
08/20/1985US4536877 Method of communicating data
08/20/1985US4536876 Self initializing phase locked loop ring communications system
08/20/1985US4536875 Retransmission control system
08/20/1985US4536874 Bandwidth efficient multipoint data communication system
08/20/1985US4536873 Data transmission system
08/20/1985EP0097180A4 A distributed control communications system.
08/14/1985EP0151430A2 Detector
08/13/1985US4535450 Digital signal repeating system
08/13/1985US4535449 Time-locking method for stations which form part of a local loop network, and local loop network for performing this time-locking method
08/13/1985US4535448 Dual bus communication system
08/13/1985US4535199 Data call transfer preindication
08/13/1985CA1191921A1 Multi-station token pass communication system
08/13/1985CA1191919A1 Communications network access rights arbitration
08/13/1985CA1191918A1 Multipoint data communication system with local arbitration
08/07/1985EP0150907A2 Method of initializing and recovering from failures in a local area network
08/07/1985EP0150540A2 Method for data communication as well as a station for carrying out the method
08/07/1985EP0150457A2 Circuit arrangement for connecting a subscriber to a bus
08/06/1985US4534061 Pseudomonas strain, optionally mixed with arthrobacter
08/06/1985US4534039 Dataset powered by control and data signals from data terminal
08/06/1985US4534038 Coupling an electrical signal to transmission lines
08/06/1985US4534024 System and method for controlling a multiple access data communications system including both data packets and voice packets being communicated over a cable television system
08/06/1985US4533948 CATV Communication system
08/06/1985CA1191641A1 Processor facilities for integrated packet and voice switching
08/01/1985WO1985003395A2 Digital data transmission method, network and module for implementing such method
07/1985
07/31/1985EP0150084A2 Architecture for intelligent control of data communication adapters
07/30/1985US4532626 Collision avoiding system and protocol for a two path multiple access digital communications system
07/30/1985US4532379 Facsimile relaying method
07/30/1985EP0114882A4 Digital communication system and control method.
07/30/1985CA1191276A1 Multiplexed first-in, first-out queues
07/24/1985EP0149498A2 Communication network with programmable device for message filtering in at least one station
07/24/1985EP0149495A2 Signal transmission system
07/24/1985EP0149253A2 Data collection apparatus of multi-drop connection type
07/23/1985US4531240 Data communication system
07/23/1985US4531239 Optical receiver having collision detection function
07/23/1985US4531238 Statistical contention control for star configured communication networks
07/23/1985US4531209 Self-routing steering network
07/23/1985US4531184 Conversational video system having contact selection control
07/23/1985US4531023 Computer security system for a time shared computer accessed over telephone lines
07/23/1985CA1190982A1 Data communication system with increased effective bandwidth
07/18/1985WO1985003183A1 Reconfigurable collision avoiding system, station and protocol for a two path multiple access digital communications system
07/17/1985EP0148297A1 Synchronous decentralized processing system
07/17/1985EP0148262A1 Data processing system including a data transmission bus
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