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)
05/1989
05/03/1989EP0314236A2 Method and circuit for information transmission
05/03/1989EP0314217A2 Controlled CSMA packet switching system
05/03/1989EP0133577B1 Data transmission system in a digital transmission network and arrangement for the use of this system
05/03/1989DE3736081A1 Method and device for setting the addresses of subscribers connected to a bus
05/02/1989US4827477 Bus interface unit
05/02/1989US4827473 Packet switching system
05/02/1989US4827256 Sound transmission method for data way system
05/02/1989CA1253624A1 System structure recognition method for a multiloop transmission system
04/1989
04/27/1989DE3735187A1 Method and circuit arrangement for controlling a switching matrix in a switching node of a broadband switching system
04/26/1989EP0313389A2 Optical packet switching system
04/26/1989EP0313105A1 Improved communications interface
04/26/1989EP0312917A2 Self-routing multistage switching network for fast packet switching system
04/26/1989EP0312628A1 High-speed modular switching apparatus for circuit and packet switched traffic
04/25/1989US4825450 Binary data communication system
04/25/1989US4825435 Multiport repeater
04/25/1989US4825362 Network system for data communication in a vehicle
04/25/1989US4825208 Method for flow control of data within a meshed data network
04/25/1989US4825206 Automatic feedback of network topology data
04/25/1989US4825204 Address setting and data transmission system
04/25/1989CA1253243A1 Telecommunications exchanges allocating variable channel bandwidth
04/24/1989EP0289525A4 Local area network interconnecting computer products via long telephone lines.
04/20/1989WO1989003566A2 Layered network
04/20/1989DE3733467A1 Circuit arrangement for switching through point-to-point links in communication networks
04/20/1989DE3732740A1 Arrangement with a central control unit and a plurality of subscribers
04/19/1989EP0312264A2 Communications protocol and apparatus for distributed station network
04/18/1989US4823389 Method and circuit apparatus for checking the authorization of access to a signal processing system
04/18/1989US4823364 Receive coupler for binary data communication systems
04/18/1989US4823345 Method and apparatus for communication network alert record identification
04/18/1989US4823344 Communication system
04/18/1989US4823338 For controlling communications between end)systems
04/18/1989US4823124 Lan controller proprietary bus
04/18/1989US4823122 Local area network for digital data processing system
04/18/1989US4823111 Landmark hierarchy method for routing signals in a communications network
04/18/1989CA1252898A1 Universal protocol data receiver
04/18/1989CA1252873A1 Ring packet switch
04/18/1989CA1252872A1 Flow control scheme for a switching network
04/18/1989CA1252871A1 Agent communication arrangements for telecommunication systems
04/18/1989CA1252870A1 Packet switch trunk circuit queueing arrangement
04/18/1989CA1252869A1 Operator communication arrangements for operator assistance systems
04/12/1989EP0310759A2 Sorting unit for a switching node with multiple digital switches for fast asynchronous data switching networks
04/11/1989US4821310 Transmission trunked radio system with voice buffering and off-line dialing
04/11/1989US4821263 Method and apparatus for transmitting information via a bus system
04/11/1989US4821259 Control information communication arrangement for a distributed control switching system
04/11/1989US4821258 Crosspoint circuitry for data packet space division switches
04/11/1989CA1252574A1 Local area network special function frames
04/11/1989CA1252550A1 Self-routing multipath packet switching network with sequential delivery of packets
04/11/1989CA1252549A1 Queueing protocol
04/11/1989CA1252535A1 Adaptive communication network and method
04/06/1989WO1989003145A1 Network apparatus and method
04/06/1989WO1989003144A1 Data link monitoring system
04/06/1989DE3731674A1 Process for synchronising terminals within an information transmission system with asynchronous time slot access
04/05/1989EP0310360A2 Data communication method and apparatus
04/05/1989EP0310173A1 Circuit arrangement for avoiding overload in a broadband switching system
04/05/1989EP0309993A2 Multimedia mail system
04/05/1989EP0309670A2 Concentrator for a fast switching network
04/05/1989EP0211861B1 Portable testing device for monitoring a data communication system
04/04/1989USRE32900 Fast circuit switching system
04/04/1989US4819235 Modem use monitor
04/04/1989US4819230 Optimized bandwith allocation mechanism between circuit slots and packet bit stream in a communication network
04/04/1989US4819229 Local area network priority control system
04/04/1989US4819228 Synchronous packet voice/data communication system
04/04/1989US4818984 Broadcasting messages in a distributed processing system
04/04/1989CA1252168A1 Communications network
03/1989
03/30/1989DE3731339A1 Method of monitoring memory devices in digitally controlled communication systems
03/29/1989EP0308890A2 Star topology local area network
03/29/1989EP0308565A1 Improvement to digital packet switching networks
03/29/1989EP0308449A1 Transfer of messages in a multiplexed system.
03/28/1989US4817177 Image transmission system
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/28/1989US4817088 Communications network
03/28/1989US4817087 Multiple access communication system
03/28/1989US4817086 Communication system
03/28/1989US4817085 Data communication system having a packet switching network
03/28/1989US4817084 Batcher-Banyan packet switch with output conflict resolution scheme
03/28/1989US4817082 Crosspoint switching system using control rings with fast token circulation
03/28/1989US4817080 Distributed local-area-network monitoring system
03/28/1989US4816826 Digital telephone switching system having a message switch with address translation
03/28/1989US4816825 Method and apparatus for power level control in area networks
03/28/1989CA1251839A1 Routing architecture for a multi-ring local area network
03/28/1989CA1251838A1 Packet transmission system
03/23/1989WO1989002684A1 Adapter between coaxial cable and twisted pair cables
03/22/1989EP0307931A2 Interface module for connecting collision detection LAN user terminals to a switching network having a different access mode.
03/22/1989EP0307461A1 Lan communication system and medium adapter for use therewith.
03/22/1989EP0307401A1 Method and apparatus for providing variable reliability in a telecommunication switching system.
03/21/1989US4815071 Packet-switched communications network for efficiently switching non-burst signals
03/21/1989US4815070 Node apparatus for communication network having multi-conjunction architecture
03/21/1989US4815069 Data communication network system and reconfiguration control method
03/21/1989US4815030 Multitask subscription data retrieval system
03/21/1989US4814761 Method and apparatus for communication control in loop communication network
03/21/1989CA1251533A1 Loop transmission system with frame synchronization control
03/21/1989CA1251532A1 Information transmission system in a local area network suitable for collision detection
03/15/1989EP0306963A2 Network system using token-passing bus acces method
03/15/1989EP0306934A2 Method for electronic data transmission and installation for using the method
03/15/1989EP0306900A2 Data transmission method in optical star network and optical star network system for realizing the same
03/15/1989EP0306781A2 Electronic mail circulation method and apparatus
03/15/1989EP0306736A2 Method for the transmission of connection information stored in a telecommunication exchange to an information-processing installation
03/14/1989USRE32887 Message communication method and system
03/14/1989US4813039 Loop transmission system and data transmission control method
03/14/1989US4813038 Non-blocking copy network for multicast packet switching
03/14/1989US4813037 Switching system
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