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)
03/1984
03/01/1984WO1984000860A1 Method and system for controlling the interconnecting of a plurality of local data networks
03/01/1984WO1984000836A1 Multiplexed first-in, first-out queues
03/01/1984EP0086223A4 A local area communication network.
02/1984
02/29/1984EP0101609A2 Data communication method
02/28/1984US4434486 Self-switched data port in-band signaling protocol
02/28/1984US4434463 Multiprocessor topology with plural bases for directly and indirectly coupling addresses and relay stations
02/28/1984US4434421 For arbitration of contended digital data communications in a system
02/28/1984US4434324 Reversal of connections of telegraphic line wires upon detection of unwanted polarity of the loop current
02/22/1984EP0101377A1 Device for the control of the transfer of files between computers
02/21/1984US4433411 Telephone switching network for digital speech transmission
02/15/1984EP0100668A2 Data transmission system via power supply line
02/15/1984EP0100662A2 Digital communication system
02/15/1984EP0100594A2 Improved local area network systems
02/15/1984EP0100593A2 Improved time slot arrangements for local area network systems
02/15/1984EP0100535A2 Circuit for receiving and transmitting data signals with a relatively high date rate in a data switching network
02/15/1984EP0100534A2 Circuit for receiving and transmitting data signals with a relatively high data rate in a data switching network
02/14/1984US4432088 Carrier sense data highway system
02/14/1984US4432054 Loop data transmission control method and system
02/14/1984US4431864 Communications system input-output converter
02/08/1984EP0099978A2 Starloop communication system
02/07/1984US4430700 System and method for communication between nodes of a closed loop local communication path
02/07/1984US4430699 Distributed data processing system
02/07/1984US4430651 Expandable and contractible local area network system
02/07/1984US4430525 Circuit arrangement for connecting telex subscriber stations to teletex subscriber stations which are connected to the same data exchange system
01/1984
01/31/1984US4429405 Method of transmitting information between stations attached to a unidirectional transmission ring
01/31/1984US4429387 Special character sequence detection circuit arrangement
01/31/1984US4429384 Communication system having an information bus and circuits therefor
01/24/1984US4428042 Interface device for coupling a system of time-division multiplexed channels to a data concentrator
01/24/1984US4427995 Fail-safe CATV system center facility
01/24/1984CA1161137A1 Method for the transmission of data packets
01/24/1984CA1161136A1 Communication link contention resolution system
01/19/1984WO1984000269A1 An interface facility for a packet switching system
01/19/1984WO1984000268A1 Time stamping for a packet switching system
01/19/1984WO1984000267A1 Fast packet switching system
01/19/1984WO1984000266A1 End-to-end information memory arrangement in a line controller
01/19/1984WO1984000265A1 Fast packet switch
01/18/1984EP0098452A2 Circuit for detecting data collisions in an optical bus, and circuit for detecting the free state of the bus
01/17/1984CA1160776A1 Apparatus for and method of collating partitioned time disordered synchronous data streams
01/17/1984CA1160711A1 Multi-master station, multi-channel digital communication system with channel selection provided at each terminal
01/11/1984EP0097753A1 Tone receiver for a digital data transmission system
01/10/1984US4425616 High-speed time share processor
01/10/1984CA1160307A1 Digital phase decoder with collision detection
01/04/1984EP0097351A2 Router unit and routing network for determining an output port by detecting a part of an input packet
01/04/1984EP0097309A2 Multiple access system and method
01/04/1984EP0097192A1 War ship comprising standard functional installations.
12/1983
12/27/1983US4423507 Communications system for interconnecting a plurality of asynchronous data processing terminals
12/27/1983US4423506 Wire data transmission system
12/21/1983EP0096419A1 Distributed variable-band switching system for speech and data
12/21/1983EP0096097A1 Method and apparatus for controlling access to a communication network
12/20/1983US4422179 Electrical-optical interface network
12/20/1983CA1159137A1 Device for transmitting data between seismic data acquisition devices and a recording device
12/13/1983CA1158739A1 Distributed network synchronization system
12/06/1983US4419751 Multiport modem and the use thereof in a method and a system for testing a multilevel communication network
11/1983
11/30/1983EP0095389A2 Data transmission system
11/30/1983EP0095337A2 Emergency access method in centralized monitoring system
11/29/1983US4418386 Communication bus for a multi-source/receiver data processing system
11/24/1983WO1983004115A1 Apparatus for connecting digital terminals to a digital exchange
11/23/1983EP0094865A2 Packet mode data transmitter and receiver
11/23/1983EP0094717A2 Process and device for the explicitly determined allocation of the token in a distributed local transmission network with priorities
11/23/1983EP0094660A1 Local area network for high transmission rates
11/23/1983EP0094431A1 Telemetry system with signal booster for digital data transmission through a transmission line
11/22/1983US4417334 Data processing system having dual-channel system bus
11/22/1983US4417242 Method for connecting or disconnecting selected stations in a ring communication system, and ring communication system including selectively connectable stations
11/22/1983CA1157544A1 Distributed status reporting system
11/16/1983EP0094322A1 High-rate coupler between a PCM multiplex and a packet switch
11/16/1983EP0094180A2 Dual-count, round-robin distributed arbitration technique for serial buses
11/15/1983US4416008 Dual loop type data highway system
11/10/1983WO1983003936A1 Synchronization apparatus in transmitting information on a simplex bus
11/09/1983EP0093623A2 Transceiver multiplexor
11/09/1983EP0093578A2 Communications system
11/09/1983EP0093549A2 CATV communication system
11/09/1983EP0093479A2 Device for the resynchronisation of information originating from an incoming time multiplex for the transmission to an outgoing time multiplex
11/02/1983EP0093004A2 Data communication system
11/01/1983US4413338 Communication system for interconnecting a plurality of asynchronous data processing terminals
11/01/1983US4413337 Time division switching system for circuit mode and packet mode lines
11/01/1983US4413259 Cascade monitoring apparatus
11/01/1983US4413258 Interconnection for local area contention networks
10/1983
10/26/1983EP0092214A2 Circuit for the acquittance of calling signals by emitting confirmation signals in an exchange, in particular in a data and telex exchange
10/25/1983US4412347 Precision setting of currents and reference voltages
10/25/1983US4412326 Collision avoiding system, apparatus and protocol for a multiple access digital communications system including variable length packets
10/25/1983US4412324 Bit-by-bit time-division switching network
10/25/1983US4412287 Automated stock exchange
10/18/1983US4411004 Inductively coupled sensing circuit and priority system
10/18/1983US4410985 Data transmission system and method
10/18/1983US4410983 Distributed industrial control system with remote stations taking turns supervising communications link between the remote stations
10/13/1983WO1983003507A1 Data communication network and method of communication
10/12/1983EP0091144A2 Signal processing unit
10/12/1983EP0091129A2 Reconfiguration control method for a loop-type data network
10/11/1983US4409593 Threshold-less collision detection and bit arbitration in a CFSK data system
10/11/1983US4409592 Multipoint packet data communication system using random access and collision detection techniques
10/06/1983EP0082200A4 Processor facilities for integrated packet and voice switching.
10/05/1983EP0090293A2 Method and circuit arrangement for the transmission of information signals between exchanges of a first and second switching network utilizing different transmission procedures
10/04/1983US4408353 Coaxial cable/fiber optic bus network
10/04/1983US4408323 Processor facilities for integrated packet and voice switching
09/1983
09/29/1983WO1983003328A1 Multiple access data communication system control
09/29/1983WO1983003327A1 Bidirectional dual network
09/21/1983EP0089159A1 Timed token ring with multiple priorities
09/21/1983EP0088906A1 Apparatus for providing transmitter hierarchy control for efficient use of a common channel by a plurality of users
09/20/1983US4406007 Circuit arrangement for time division multiplex data transmission with a bus system
09/15/1983WO1983003180A1 Timed token ring with multiple priorities
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