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)
04/1985
04/16/1985US4512026 Data format for asynchronous data transmission
04/16/1985US4512025 Increasing capacity of baseband digital data communication networks
04/16/1985US4512014 Time slot multiplex system for the division multiplexing of digital communication signals
04/16/1985US4512011 For controlling the communication of information packets
04/16/1985US4511958 Common bus access system using plural configuration tables for failure tolerant token passing among processors
04/16/1985US4511759 Apparatus for controlling transfers of files between computers
04/11/1985WO1985001626A1 Improved local area network configuration
04/10/1985EP0136517A2 Deterministic multi-access method for a decentralized mobile radio system
04/09/1985US4510600 Digital signal transmission system
04/09/1985US4510599 Prioritized unidirectional distributed bus accessing system
04/09/1985US4510594 In a packet communication system
04/09/1985US4510494 Loop type data highway system
04/09/1985US4510493 Method and arrangement for local address acquisition by a station in a communication system
04/09/1985US4510492 Message communication method and system
04/09/1985CA1185374A1 Ring purging method
04/02/1985US4509167 Data conference arrangement
04/02/1985US4509117 Communications network access rights arbitration
03/1985
03/27/1985EP0135037A1 Structure detecting method for circular type transmission system
03/26/1985US4507778 Digital transmission system
03/26/1985US4507777 Protocol for determining physical order of active stations on a token ring
03/20/1985EP0134544A2 Variable band distributed switching node with dynamic hybrid-frame management
03/20/1985EP0134217A1 Activation of a transmission link by code sending.
03/19/1985USRE31852 Data transmission system
03/19/1985US4506361 Retransmission control system
03/19/1985US4506360 Multi-station token pass communication system and method
03/19/1985US4506358 Time stamping for a packet switching system
03/19/1985US4506357 Method and apparatus for switching loop type transmission lines
03/19/1985US4506111 Text mailing system using a telephone line
03/19/1985CA1184267A1 Cascade monitoring apparatus
03/14/1985WO1985001169A1 Method for transmission of alarm signals
03/13/1985EP0134057A1 Multiple-access communications system
03/12/1985US4504945 Computer network system
03/06/1985EP0133760A2 Transmission line control system
03/05/1985US4503533 Local area communication network utilizing a round robin access scheme with improved channel utilization
02/1985
02/28/1985WO1985000947A1 Data conference arrangement
02/27/1985EP0133577A1 Data transmission system in a digital transmission network and arrangement for the use of this system
02/27/1985EP0133567A2 A method of polling and a communication system for ascertaining service needs
02/26/1985US4502137 In a multipoint communication network
02/19/1985US4501021 Data communications system
02/19/1985US4500990 Data communication device including circuitry responsive to an overflow of an input packet buffer for causing a collision
02/19/1985US4500989 Digital communication system
02/19/1985US4500988 VLSI Wired-OR driver/receiver circuit
02/19/1985US4500987 Loop transmission system
02/13/1985EP0133139A1 Auxiliary device for utilizing data communication systems in local networks, and systems incorporating such a device
02/13/1985EP0132836A1 Method and arrangement to control the processing of signalling information
02/13/1985EP0132645A2 Method and apparatus for facilitating collision detection
02/13/1985EP0132644A2 Method and apparatus for interfacing between a multiple access bus and user devices
02/13/1985EP0132464A1 Video and data distribution module with subscriber terminal
02/12/1985US4499576 Multiplexed first-in, first-out queues
02/05/1985US4498169 Multiaccess broadcast communication system
02/05/1985US4498168 Communication network and method for its use
02/05/1985US4498082 Method and apparatus for locating a discontinuity in a data transmission ring
02/05/1985US4497976 Method for emitting additional information in conjunction with message signals to be transmitted over a data switching center
01/1985
01/31/1985WO1985000486A1 Data link extension for data communication networks
01/31/1985WO1985000452A1 Data processing system including a data transmission bus
01/29/1985CA1181840A1 Self-switched data port in-band signaling protocol
01/23/1985EP0131662A1 Distributed network synchronization system
01/23/1985EP0131591A1 Activation in a digital subscriber connection.
01/22/1985US4495617 Signal generation and synchronizing circuit for a decentralized ring network
01/22/1985US4495595 Method and system of loop transmission
01/22/1985US4495572 Computer intercommunication system
01/22/1985US4495493 Method of controlling the transmission/reception of data in a local communication network, and data transmission system for performing the method
01/16/1985EP0131289A1 Loop-type data transmission/reception network
01/15/1985US4494233 Method and apparatus for the detection and regeneration of a lost token in a token based data communications network
01/15/1985US4494231 Time division switching system for circuit mode and packet mode channels
01/15/1985US4494230 Fast packet switching system
01/15/1985US4494185 Data processing system employing broadcast packet switching
01/15/1985US4494113 Method and apparatus for self-control in distributed priority collision
01/09/1985EP0130431A1 System for digitized voice and data with means to compensate for variable path delays
01/09/1985EP0130206A1 Method and apparatus for bus contention resolution.
01/08/1985US4493074 Content induced transaction overlap communication system
01/08/1985US4493021 Multicomputer communication system
01/02/1985EP0130000A2 Apparatus and method for controlling access by a plurality of units to a shared facility
01/02/1985EP0129716A2 Arrangement for the transmission of digital signals
01/02/1985CA1180459A Distributed data processing in ring-structured networks architected for full duplex peer-to-peer operation of processing stations and uninterruptible transfer of long data records between stations
01/02/1985CA1180407A Data transmission systems
01/01/1985US4491947 Technique for dynamic scheduling of integrated circuit- and packet-switching in a multi-beam SS/TDMA system
01/01/1985US4491946 Multi-station token pass communication system
01/01/1985US4491945 Fast packet switch
01/01/1985US4491942 Circuit for recognizing data collisions in an optical data bus and circuit for recognizing the data-free status of the bus
01/01/1985US4491838 Starloop communication network and control system therefor
12/1984
12/27/1984CA1180061A Electrical-optical interface network
12/25/1984US4490817 Packet error rate measurements by distributed controllers
12/20/1984WO1984005009A1 Method and apparatus for the connection of a closed ring through a telephone exchange
12/20/1984WO1984005003A1 System for switching multirate digitized voice and data
12/19/1984EP0128406A2 Data transmission/reception network system
12/19/1984EP0128214A1 Packet error rate measurements by distributed controllers.
12/19/1984EP0128172A1 Distributed time division multiplexing bus
12/18/1984US4489420 Clear channel detector for binary digital data transmission system
12/18/1984US4489419 Data communication system
12/18/1984US4489379 Distributed data processing in ring-structured networks architected for full duplex peer-to-peer operation of processing stations and uninterruptible transfer of long data records between stations
12/18/1984CA1179754A1 Time division multiplex switching network for multi- service digital networks
12/12/1984EP0127967A1 Remote control systems
12/11/1984US4488289 Interface facility for a packet switching system
12/11/1984US4488288 In a packet communication system
12/11/1984US4488232 Self-adjusting, distributed control, access method for a multiplexed single-signal data bus
12/11/1984CA1179411A1 Bus access circuit for high speed digital data communication
12/06/1984WO1984004862A1 Scheme for reducing transmission delay following collision of transmissions in communication networks
12/06/1984WO1984004861A1 Method and device for the transfer of data in a data loop
12/04/1984US4486878 Digital telephone exchange with means for processing packet-switched data
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