Patents for H04L 12 - Data switching networks (448,999)
09/1987
09/24/1987WO1987005767A1 Communication system having a control channel and an image channel
09/24/1987WO1987005763A1 Bridging techniques for local area networks
09/23/1987EP0237839A2 Serial data bus for intermodule data communications and method of data arbitration and collision detection on a data bus
09/23/1987EP0237582A1 Local area networks
09/23/1987CN86108890A Method and apparatus for establishing wideband communication facility through communications network having narrow bandwidth channels
09/23/1987CN86107753A Thin-wire multiport repeater
09/22/1987US4696001 Reconfigurable high-speed integrated local network
09/22/1987US4696000 Nonblocking self-routing packet and circuit switching network
09/22/1987US4695999 Cross-point switch of multiple autonomous planes
09/22/1987US4695974 Circuit arrangement for receiving and/or transmitting binary signals serially appearing on the plurality of lines to and from a processing device containing a micro-computer or microprocessor
09/22/1987US4695952 Dual redundant bus interface circuit architecture
09/22/1987US4695772 Digital multi-beam CRT controller
09/22/1987CA1227295A1 Method and system for transmitting digitized voice signals as packets of bits
09/17/1987DE3608028A1 Method and circuit arrangement for testing access right to signal processing system
09/16/1987EP0237247A2 Switching system control arrangements
09/16/1987EP0237211A2 Packet buffer memory control for statistical multiplexing
09/16/1987EP0236932A2 Method of operating information distribution networks, particularly those of decentralized supervision systems
09/16/1987EP0236818A1 Method and circuit arrangement for monitoring subscribers' lines connected to a data switching or data transmission installation
09/16/1987EP0112340B1 End-to-end information memory arrangement in a line controller
09/16/1987CN86108509A Method of secured communications in telecommunications systems
09/15/1987US4694453 System for adjusting signal transmission timing in time-division multiplexing signal transmission
09/15/1987US4694294 Synchronized network system
09/15/1987US4694293 Data transmission system
09/15/1987US4694195 Ratio analyzer
09/15/1987CA1226917A1 Data transmission system
09/15/1987CA1226916A1 Method of initializing and recovering from failures in a local area network
09/15/1987CA1226915A1 Plant management system
09/10/1987DE3606885A1 System for transmitting information signals and control signals
09/09/1987EP0236102A2 Apparatus and method for transmitting first and second types of information over a time slot driven bus
09/09/1987EP0235649A1 Circuit arrangement for serial data transmission between several stations
09/09/1987EP0235648A1 Circuit arrangement for serial data transmission between several stations
09/09/1987EP0235257A1 Multiplexed digital packet telephone communication method.
09/09/1987EP0235254A1 Packet switched local network with priority random splitting and conflict detection
09/08/1987US4692919 Communications network
09/08/1987US4692918 In a distributed processing system
09/08/1987US4692917 Packet switching system
09/08/1987US4692761 Adaptive communication network and method
09/08/1987CA1226655A1 Method and circuit arrangement for providing date and time information in a telex and data switching system
09/08/1987CA1226638A1 Data communication method
09/02/1987EP0235012A1 Method and apparatus for transmitting alphanumeric data via a radio channel
09/02/1987EP0234861A2 Packet generation apparatus and method
09/02/1987EP0234860A2 Time stamping for packet system nodes
09/02/1987EP0234859A2 Time stamp and packet virtual sequence numbering for reconstructing information signals from packets
09/02/1987EP0234453A1 Circuit arrangement for serial data transmission between several stations
09/02/1987EP0234355A1 Circuit arrangement for PCM telecommunication installations, especially PCM telephone exchanges, with a plurality of synchronous clock-controlled transmitters for a common transmission channel
09/02/1987EP0234191A2 Packet-switched communications network with parallel virtual circuits for re-routing message packets
09/02/1987EP0233898A1 Interconnection of broadcast networks.
09/02/1987EP0097192B1 War ship comprising standard functional installations
09/01/1987US4691297 Circuit arrangement for receiving and/or transmitting serially appearing binary signals in or from a processing device containing a microcomputer or a microprocessor
08/1987
08/25/1987US4689786 Local area network with self assigned address method
08/25/1987US4689785 Data transmission system
08/25/1987US4689619 Method and apparatus for polling subscriber terminals
08/25/1987CA1226070A1 Non-unique names for broadcast messages
08/25/1987CA1226051A1 Data communication network having interface and concentrator
08/19/1987EP0232660A1 Terminal for a digital dater transmission network with packet switching
08/19/1987EP0232437A1 Multiplex interface for a communication controller
08/19/1987EP0146566B1 Scheme for reducing transmission delay following collision of transmissions in communication networks
08/19/1987CN86108038A Switching system having multiple parallel switching networks
08/18/1987US4688266 Car data transmission device for optical fibers
08/18/1987US4688213 Asynchronous random access communication system with collision resolution based on time of arrival
08/18/1987CA1225760A1 Method for transmission of alarm signals
08/18/1987CA1225714A1 Carrier sense multiple access with collision avoidance utilizing rotating time staggered access windows
08/12/1987EP0231967A1 Switching system
08/12/1987EP0231907A2 Transmission control apparatus for duplex loop type transmission system
08/12/1987EP0128214B1 Packet error rate measurements by distributed controllers
08/12/1987EP0112831B1 Fast packet switch
08/11/1987US4686506 Multiple connector interface
08/05/1987EP0230847A1 Packet multiplex switching system
08/05/1987EP0230676A2 Integrated switch
08/05/1987EP0230549A2 Linear-space signalling for a circuit-switched network
08/04/1987USRE32468 Central station alarm
08/04/1987US4685149 Meteor scatter burst communication system
08/04/1987US4685128 Method and network for transmitting addressed signal samples from any network input to an addressed network output
08/04/1987US4685113 Driver isolating circuit for common bus-type transmission of local area network
08/04/1987US4685105 Loop transmission method
08/04/1987US4684941 Method of communications between register-modelled radio devices
08/04/1987CA1225121A1 Optical network system of bus architecture capable of rapidly detecting collision at each communication station
07/1987
07/30/1987WO1987004579A1 Switching system
07/30/1987DE3528767A1 TDMA point-to-multipoint communication system
07/29/1987EP0230338A2 Image processing system
07/29/1987EP0230116A1 TDM ring communication medium
07/28/1987US4683564 Matrix switch system
07/28/1987US4683563 Data communication network
07/28/1987US4683471 Transceiver for a local area network system
07/23/1987DE3601243A1 Local area network for single-chip computers
07/22/1987EP0229684A2 Data framing system for time division multiplexing transmission
07/22/1987EP0229365A1 Method and apparatus for establishing a wideband communication facility through a communications network having narrow bandwidth channels
07/22/1987EP0229316A2 Method and apparatus for constructing and operating multipoint communication networks utilising point-to-point hardware and interfaces
07/22/1987EP0229299A2 A nonblocking self-routing packet and circuit switching network
07/22/1987EP0229270A2 A transmit-secure non-blocking circuit-switched local area network
07/22/1987EP0229257A2 Collision detection arrangement for bus configuration
07/22/1987EP0229158A1 Circuit employing intercoupled state machines for transmitting and receiving multiformatted sequences of voice and data characters
07/22/1987EP0076844B1 Data processing system having dual-channel system bus
07/21/1987US4682326 Method and apparatus for maintaining a dynamic logical ring in a token passing lan
07/21/1987US4682325 System for selectively coupling a plurality of stations into a single communications path
07/21/1987US4682324 Method for transmitting user message signals in a local area network
07/21/1987CA1224556A1 System for switching trains of constant length data packets
07/21/1987CA1224555A1 Method of transferring information via a digital telecommunication network and network for such transferring
07/15/1987EP0228709A2 Satellite communication system with random multiple access and time slot reservation
07/15/1987EP0228629A2 Time-division multiplexing communication system