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)
05/1982
05/19/1982EP0051960A1 A shared line transmitter
05/18/1982CA1123962A1 Computer communication network adapter
05/18/1982CA1123939A1 Time-division switching system for multirate data
05/12/1982EP0051332A1 Two-wire bus-system comprising a clock wire and a data wire for interconnecting a number of stations
05/11/1982CA1123501A1 Apparatus for establishing multi-address and conference call connections
04/1982
04/28/1982EP0050435A2 Coaxial cable/fiber optic bus network
04/27/1982US4327418 High speed information selection and transfer system
04/21/1982EP0049917A1 Communication system and station suitable therefor
04/07/1982EP0049045A2 A multi-master station, multi-channel digital communication system with channel selection provided at each terminal
04/07/1982EP0048861A1 Universal digital mobile radio network for packet-switched data transmission
04/07/1982EP0048854A1 Mobile radio telephone system for digital speech transmission
04/07/1982EP0048853A1 Telephone switching network for digital speech transmission
04/06/1982US4323728 Conversion circuit arrangement and method for switching digital encoded signals
04/06/1982CA1121514A1 Programmable bus driver isolation
03/1982
03/30/1982US4322849 Data relay system
03/30/1982CA1121023A1 Code generator for use in a text transmission system
03/30/1982CA1121014A1 Method and apparatus for transaction and identity verification
03/23/1982US4321703 Transmission system for telecopying and electronic transmission of in-house mail
03/23/1982CA1120557A1 Balanced termination for a transmission line
03/16/1982US4320520 Transmitter/receiver for use on common cable communications system such as ethernet
03/16/1982US4320508 Self-diagnosing, self-correcting communications network
03/16/1982US4320500 Method of and system for routing in a packet-switched communication network
03/16/1982US4320388 Two wire optical data communication system
03/09/1982US4319338 Industrial communications network with mastership determined by need
03/02/1982CA1119272A1 Multiple-processor digital communication system
02/1982
02/24/1982EP0046259A1 Method of establishing connections from subscriber sets or transmission lines connected to a data exchange to signal converters
02/24/1982EP0046203A1 Multiprocessor arrangement with a common bus
02/23/1982US4317197 Transparent intelligent network for data and voice
02/23/1982US4317196 Transparent intelligent network for data and voice
02/23/1982US4317195 Method of and device for reducing speech-reproduction irregularities in packet-switching telecommunication systems
02/16/1982US4316283 Transparent intelligent network for data and voice
02/02/1982US4314367 Switching circuit for digital packet switching network
02/02/1982US4314233 Four-wire speed independent arbiter switch for digital communication networks
01/1982
01/27/1982EP0044685A1 Data communication system
01/26/1982CA1117205A1 Packet-switched data communications system
01/20/1982EP0044069A1 System for the fast establishment of switched connections in communication networks
01/19/1982US4312065 Transparent intelligent network for data and voice
01/08/1982EP0033337A4 Digital loop synchronization circuit.
12/1981
12/30/1981EP0042447A1 Flow control mechanism for block switching nodes
12/29/1981US4308613 Simplex, party-line electromagnetic data packet transmission system with a self seeking alternate routing capability
12/29/1981CA1115346A1 Multiple access digital communications system
12/22/1981US4307446 Digital communication networks employing speed independent switches
12/22/1981US4307378 Four-wire speed independent selector switch for digital communication networks
12/22/1981US4307265 Circuit arrangement for transmitting digital signals between transmitting and/or receiving devices operating with different data transmission procedures and different data formats
12/16/1981EP0041695A1 Signalling system and signal control equipment for multi-address calling
12/15/1981US4306304 Digital loop synchronization circuit
12/08/1981US4304960 Teleprinter private branch exchange
12/02/1981EP0041001A1 Bit-by-bit time-division digital switching networks
12/01/1981US4304001 Industrial control system with interconnected remotely located computer control units
12/01/1981CA1113571A1 Multiple-processor digital communication system
11/1981
11/17/1981US4301532 Arrangement for transmitting digital data signals
11/03/1981US4298978 Data communication apparatus
11/03/1981CA1111641A1 Merchandise display and categorical indicators
10/1981
10/20/1981US4296403 Method and circuit arrangement for switching and transmitting signals in, or from, a stored program controlled switching system
10/13/1981US4295122 Bus priority control method in loop bus network system
10/07/1981EP0037074A1 Method and circuit for the reception and transmission of information and signalling data in a programme-controlled data switching exchange
10/06/1981US4293948 Data transmission system
09/1981
09/30/1981EP0036808A1 Communication system concentrator for connecting a plurality of asynchronous terminals
09/30/1981EP0036807A1 Communication system concentrator for connecting a plurality of asynchronous terminals
09/29/1981US4292623 Port logic for a communication bus system
09/29/1981US4292465 Distributed processing telex exchange
09/29/1981CA1109950A1 Digital telecommunication switching systems
09/23/1981EP0036172A1 Multi-station processor intercommunication system comprising means for remote processor initialization
09/22/1981US4291196 Circuit for handling conversation data in a distributed processing telex exchange
09/16/1981EP0035789A2 Method and arrangement for loop initialization in a peer-to-peer serial loop communication system
09/16/1981EP0035731A2 Method and arrangement for transmitting data signals
09/15/1981US4290134 Multiplex information handling system
09/09/1981EP0035277A1 Sequential transmission system for connecting without addressing a plurality of subscribers to an exchange
09/08/1981US4288658 Apparatus for generating telex signaling sequences in a distributed processing telex exchange
09/01/1981US4287592 Method and apparatus for interfacing stations in a multiloop communications system
09/01/1981US4287387 Teletypewriter loop switching matrix
08/1981
08/26/1981EP0034514A1 Time division switching installation for lines carrying voice and data packets
08/26/1981EP0034355A1 Interface for linking two data processing systems
08/25/1981US4286112 Message preparation timing apparatus
08/18/1981US4285037 Circuit arrangement for a switching system
08/18/1981US4284976 Interface between communication channel segments
08/18/1981US4284843 Repeating station for use in digital data communications link
08/12/1981EP0033672A2 Digital data switching device
08/12/1981EP0033665A1 Data communication system
08/12/1981EP0033591A1 Improvements in or relating to data transmission systems
08/12/1981EP0033337A1 Digital loop synchronization circuit.
08/05/1981EP0033228A2 Industrial control system
08/04/1981US4282400 Signaling unit for interchange of data with multipoint line selection units and data terminals
07/1981
07/28/1981US4281216 Key management for encryption/decryption systems
07/21/1981US4280221 Digital data communication system
07/14/1981US4279034 Digital communication system fault isolation circuit
07/14/1981CA1105109A1 Test set for measuring jitter distortion of data pulses
06/1981
06/30/1981US4276643 Method of and means for routing binary messages through a multinode data-transmission system
06/10/1981EP0030095A1 Bus transmission system
06/03/1981EP0029705A1 Status reporting system and data transmitters for use in such a system
06/03/1981EP0029502A1 A method of transmitting data between ports of a communication system comprising a network of interconnected nodes, and a communication system comprising a network of interconnected nodes, and a nodal unit for use as a node in a method or system as aforesaid
06/02/1981US4271523 Contention interference detection in data communication receiver
06/02/1981US4271511 Communications network
06/02/1981US4271507 Communication broadcast channel interface
06/02/1981US4271506 High speed data switching node
06/02/1981CA1102421A1 Security controlled information exchange system
05/1981
05/26/1981US4270214 High impedance tap for tapped bus transmission systems
05/13/1981EP0028440A2 A circuit for handling conversation data in a distributed processing telex exchange
05/13/1981EP0028439A1 A distributed processing telex exchange
05/13/1981EP0028438A1 An apparatus for generating telex signaling sequences in a distributed processing telex exchange
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