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)
03/1990
03/27/1990CA1267231A1 Method and circuit arrangement for the transmission of data signals between two control devices belonging to a loop system
03/22/1990WO1990003074A1 System for the automatic notification of message reception in an electronic messaging system
03/22/1990WO1990003005A1 Entity management system
03/22/1990WO1990003004A1 Multiport memory system
03/22/1990EP0441798A1 Entity management system for a distributed computer system
03/21/1990EP0198010B1 Packet switched multiport memory nxm switch node and processing method
03/20/1990US4910794 Mobile radio data communication system and method
03/20/1990US4910777 Packet switching architecture providing encryption across packets
03/20/1990US4910763 Switching device for connecting a data transmission system to the telephone switched network
03/20/1990US4910731 Switching system and method of construction thereof
03/20/1990US4910730 Batcher-banyan network
03/20/1990US4910655 Apparatus for transferring signals and data under the control of a host computer
03/20/1990US4910628 Terminal unit in information transmission system
03/20/1990US4910507 Interface module for connecting collision detection LAN user terminals to different access mode switching network
03/20/1990CA1266921A1 Circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
03/20/1990CA1266920A1 Method and circuit arrangement for the transmission of data signals between two control devices belonging to a loop system
03/20/1990CA1266906A1 Combined circuit switch and packet switching system
03/14/1990EP0358441A2 Communication apparatus
03/14/1990EP0357992A2 Bus-type local area network using a token-passing scheme
03/14/1990EP0357719A1 Marketing research system for obtaining retail data
03/14/1990EP0357618A1 Switching system.
03/14/1990CN1040473A Frame removal mechanism for taken ring networks
03/14/1990CN1040471A Communication system using distributed switching for time division multipexing of voice and date
03/13/1990USRE33181 Data transmission system adapted to facilitate detection of safe receipt of a transmitted data frame by a receiving station
03/13/1990US4908822 Electrical devices command system, single wire bus and smart dual controller arrangement therefor
03/13/1990US4908821 Data communications system having a packet switching network
03/08/1990WO1990002458A1 A method for remote configuration of a modem
03/08/1990WO1990002457A1 Series control apparatus
03/08/1990WO1990002455A1 Link utilization control mechanism for demand assignment satellite communications network
03/08/1990WO1990002382A1 Information distribution system
03/07/1990EP0357136A1 Communication system, a station to be used in such a system, and a gate connecting element to be used in such a system, as well as a device comprising such a gate connecting element
03/07/1990EP0357038A2 Signal transmission system and method, in which operation response time can be shortened
03/07/1990EP0356530A1 Dialogue system
03/07/1990CN1007117B Extended equipment for communication system
03/07/1990CN1007114B System structure recognition method for multiloop transmission system
03/06/1990US4907254 Power source system for data terminal equipment
03/06/1990US4907227 In-line coupling circuit for a closed-loop communication terminal
03/06/1990US4907224 Method for transmitting data in multiple access data communications networks
03/06/1990US4907222 Vehicle multiplex system
03/06/1990US4907220 Process for the establishment of virtual connections passing through switching matrices of a multi-stage switching system
03/06/1990US4907188 Image information search network system
03/06/1990CA1266515A1 Start pattern detecting apparatus
02/1990
02/28/1990EP0355877A1 Optical network
02/28/1990EP0355861A1 Industrialized token passing network
02/28/1990EP0355797A2 Signalling apparatus for use in an ATM switching system
02/28/1990EP0355697A2 Multimedia bidirectional broadcast system
02/28/1990EP0355532A2 Arrangement for transmitting data and supply voltage via a bus
02/28/1990EP0245249B1 Synchronous, decentralized data transmission method, and data transmission network using such method
02/28/1990CN1040120A Total data communication exchange system
02/27/1990US4905273 Data transmission system
02/27/1990US4905258 Data circuit-terminating equipment
02/27/1990US4905233 Multiple path routing mechanism for packet communications network
02/27/1990US4905231 Packet communication arrangement
02/27/1990US4905230 Token ring expander and/or hub
02/27/1990US4905229 Local area communication network
02/27/1990US4905225 Communication system for timing multiplex hybrids
02/27/1990US4905224 Sorting unit for a switching node comprising a plurality of digital switching matrix networks for fast, asynchronous packet switching networks
02/27/1990US4905223 Wideband/multislot switching arrangement
02/27/1990US4905219 Node structure for communication system
02/27/1990US4904879 Data current coupler and methods of making and assembling same
02/27/1990CA1266318A1 High-speed packet-switched communications system with end-to-end flow control and retransmission
02/27/1990CA1266317A1 Communications network
02/27/1990CA1266310A1 Circuit arrangement for serial data transmission between a plurality of subscriber stations
02/22/1990WO1990001842A1 Method and apparatus for accessing a facsimile store and forward network
02/22/1990WO1990001739A1 Network interface
02/22/1990DE3919012A1 Universal network with access to other planes or adjacent networks - controls signal traffic by interaction of exchange with coupling stations
02/22/1990DE3827688A1 Method for serial data transmission
02/21/1990CN1039943A Communication system having packet structure field
02/21/1990CN1039942A Multi-exchange transmission system for program-control telephone fee-counting data
02/20/1990US4903280 Circuit arrangement for serial data transmission between a plurality of subscriber stations
02/20/1990US4903261 Synchronous packet voice/data communication system
02/20/1990US4903260 Digital circuit-switching and packet-switching network and switching facility therefor
02/20/1990US4903016 Communication control unit
02/20/1990US4903015 Communication device and star circuit for use in such a communication device, and device comprising such a star circuit
02/20/1990US4902989 Local area network coaxial cable connection device
02/20/1990US4902881 Public document image and voice communications terminal
02/20/1990CA1266137A1 Channel assignment system for loop network
02/15/1990DE3827493A1 Method and arrangement for implementing data connections in a communication switching system
02/14/1990EP0354809A2 Frame removal mechanism for token ring networks
02/14/1990EP0354572A2 Improved local area network system
02/13/1990US4901348 Data transmission security arrangement for a plurality of data stations sharing access to a communication network
02/13/1990US4901342 Local area network connecting computer products via long telephone lines
02/13/1990US4901312 Remote interconnection of local area networks
02/13/1990US4901311 Communication method and equipment therefor
02/13/1990US4901309 Cross-connect for switch modules
02/13/1990US4901277 Network data flow control technique
02/13/1990CA1265879A1 Data framing system for time division multiplexing transmission
02/13/1990CA1265860A1 Communications network
02/13/1990CA1265855A1 Industrialized token passing network
02/08/1990WO1990001234A1 Multilevel concurrent communications architecture for multiprocessor computer systems
02/08/1990DE3932700A1 Connection testing in communication network - has test signals with time channel addresses, if network is of TDM type
02/08/1990DE3826774A1 Netzwerkschnittstelle Network interface
02/07/1990EP0354120A1 Method and device for asynchronous transmission using microcells
02/07/1990EP0354119A1 Packet switch for asynchronously transmitting data in a digital transmission network
02/07/1990EP0353927A2 Method for transfer of data between a media access controller and buffer memory in a token ring network
02/07/1990EP0353859A2 Network transit prevention
02/07/1990EP0353759A2 Mobile radio data communication system and method
02/06/1990US4899338 Electrical device command system, single wire bus and smart octal controller arrangement therefor
02/06/1990US4899337 Time division multiplexer with automatic call function
02/06/1990US4899335 Self routing packet switching network architecture
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