Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 29 - Arrangements, apparatus, circuits or systems, not covered by a single one of groups
Patents for H04L 29 - Arrangements, apparatus, circuits or systems, not covered by a single one of groups (330,333)
05/1991
05/16/1991WO1991007038A2 Method and apparatus for effecting efficient transmission of data
05/15/1991EP0427502A2 Programmable logic controllers
05/14/1991US5016244 Method for controlling failover between redundant network interface modules
05/10/1991WO1991007839A1 Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
05/08/1991EP0426623A2 A process and a device for speed adaptation for integrated services digital network (ISDN)
05/08/1991EP0426599A2 Method of clustering nodes in a distributed computer network
05/08/1991EP0425845A2 Method and apparatus for serial data flow control
05/08/1991EP0425839A2 Data processing system channel
05/08/1991EP0425779A2 Apparatus and method for transmitting commands
05/07/1991WO1991007032A1 Automatic fault recovery in a packet network
05/07/1991US5014269 Microcomputer integrating a digital subscriber terminal for an integrated service digital network
05/07/1991US5014260 Method and apparatus for preventing transmission of data packets with a greater intensity than a predetermined value on any one of a number of channels on a common transmission link
05/04/1991WO1991007021A1 Global satellite communication system with geographic protocol conversion
05/02/1991EP0425317A2 Network interface system
05/02/1991DE3934045A1 Secure data transmission with specified Hamming distance - inserting 01 or 10 bit trains on transmit side at positions agreed with receiver
04/1991
04/30/1991US5012489 Method for sending a plurality of data channels over a single communications line
04/30/1991US5012470 Data terminal equipment and data transmission control method
04/30/1991US5012120 Load control system and method for disconnecting sub-bus from main-bus
04/24/1991CN1050960A Device for evaluating and/or regulating throughput of virtual circuits on asynchronous time-division multiplex transmission channel
04/23/1991US5010514 Structured fields at a data stream boundary for delimiting files
04/18/1991WO1991005417A1 Pipes logical network
04/18/1991WO1990010987A3 Energy saving protocol for a communication system
04/17/1991EP0422782A2 Communications architecture interface
04/17/1991EP0422717A1 Method for monitoring a transmission system which comprises a plurality of virtual, asynchronously time-shared transmission channels via which a data flow can be transmitted
04/17/1991CN1012412B High speed half duplex modem with fast turnaround protocol
04/16/1991US5008952 Global satellite communication system with geographic protocol conversion
04/16/1991US5008883 Communication system
04/10/1991EP0421779A2 Communication device
04/10/1991EP0421652A2 Coordination method for multi-user system conformance testing
04/10/1991EP0421409A2 Transaction system security method and apparatus
04/09/1991US5007051 Link layer protocol and apparatus for data communication
04/09/1991US5007045 Integrated communications system for HDLC variable-length data packets and fixed-length voice/video packets
04/09/1991US5007017 Method and apparatus for data communication through composite network
04/04/1991WO1991004461A1 Integrated data transmission computer and system
04/04/1991DE3931537A1 Terminal connector to voltage supply bus=bar - has output coupler for each terminal, with voltage limiting zener diode parallel to output coupler output
04/04/1991CA2024246A1 Coordination method for multi-user system conformance testing
04/03/1991EP0420531A2 Channel adapter for broadband communications at channel speeds
04/03/1991EP0419805A2 Parallel architecture for high speed flag detection and packet identification
04/03/1991EP0419750A1 Distribution mechanism for establishing communications between user interfaces of a communication system
04/03/1991CN1050480A Message routing check system
04/02/1991US5005122 Arrangement with cooperating management server node and network service node
03/1991
03/27/1991EP0419019A1 Message routing check system
03/27/1991EP0418866A2 Signal transmission system capable of performing re-transmission control in units of slots
03/27/1991EP0418812A2 A packet communication system using a telephone switching network and a data flow control method
03/27/1991EP0418776A2 Controller for effecting a serial data communication and system including the same
03/26/1991US5003582 Method of adjusting the end of transmission in a modem
03/26/1991US5003536 Communication system
03/26/1991US5003470 Method for tying and untying path access in a CPU-based, layered communications system
03/26/1991CA1282135C Remote test circuit for channel terminal
03/21/1991WO1991003788A1 Parallel i/o network file server architecture
03/20/1991EP0418130A1 Quality monitoring equipment for digital transmission links
03/19/1991US5001750 Secret communication control apparatus
03/19/1991US5001628 Single system image uniquely defining an environment for each user in a data processing system
03/19/1991CA2025500A1 Message routing check system
03/15/1991WO1991004621A1 Network control system
03/15/1991CA2042051A1 Network control system
03/13/1991EP0416943A2 Method for controlling failover between redundant network interface modules
03/13/1991EP0416942A2 Method of detecting a cable fault and switching to a redundant cable in a universal local area network
03/13/1991EP0416891A2 Apparatus for providing a universal interface to a process control system
03/13/1991EP0416679A1 Data transmission device with differential data transmission link
03/13/1991EP0416013A1 Multimode modem.
03/13/1991EP0211849B1 Pager system and communication protocol
03/12/1991US4999834 Communication method and apparatus
03/12/1991US4999829 Automatic fault recovery in a packet network
03/12/1991US4999771 Communications network
03/12/1991US4999766 Managing host to workstation file transfer
03/12/1991CA1281432C Multipoint link data-transmission control system
03/09/1991WO1991003893A1 Quality control equipments for digital transmission connections
03/07/1991DE4007460A1 Rapid identification of faults and changeover in telephone network - having faults identified by 1 out of N-unit coupled back to switching network
03/06/1991EP0414930A1 Method and circuit arrangement for preventing misrouting of data blocks received on incoming lines via a block exchange
02/1991
02/27/1991EP0414624A2 System for calling procedures on a remote network node
02/27/1991EP0414385A2 Communication apparatus for monitoring the amount of transmitted data
02/27/1991EP0413873A1 Fast scheduler allowing transient computing overloads
02/27/1991EP0413827A1 Isdn composite switching system
02/27/1991EP0235199B1 Communication protocol selection for data processing system
02/27/1991EP0185093B1 Data transfer equipment
02/26/1991US4996706 Method of controlling the electric power supplied to a modem
02/21/1991WO1991002313A1 Data processing network
02/21/1991WO1991002305A1 Workstations and data processing network containing workstations
02/20/1991EP0413652A2 Method and system for establishing and maintaining virtual chains in a distributed computer network
02/20/1991EP0413369A1 A portable pager
02/20/1991EP0413074A1 Managing host to workstation file transfer
02/19/1991US4995056 System and method for data communications
02/19/1991US4994998 Apparatus and method for structuring data written according to ISO/8824/ASN.1 specification
02/19/1991CA1280484C Link controller
02/14/1991DE3925843A1 Transmitting data telegrams between two stations - forming transmit packs of one or several telegrams and adding synchronising telegrams
02/13/1991EP0412574A2 Antenna for watch pager system
02/13/1991EP0412406A2 Smoothing filter for preamble length processing in a FDDI network
02/13/1991EP0412232A2 Apparatus and method for providing high performance communication between software processes
02/10/1991CA2022838A1 Smoothing filter
02/07/1991WO1991001607A1 Digital data transmission system
02/06/1991EP0411529A1 Synchronous digital transmitter
02/06/1991EP0411497A2 Data processing system and data transmission and processing method
02/05/1991US4991184 Data communication system having a speed setting variable with transmission quality factors
02/05/1991US4991133 Specialized communications processor for layered protocols
02/05/1991CA1279933C2 Local area network for digital data processing system
02/05/1991CA1279917C Method and apparatus for packet-switched network communications measurement matrix display
01/1991
01/30/1991EP0410461A2 Facsimile communication device
01/30/1991EP0410314A2 Intelligent network interface circuit
01/29/1991US4989139 Map case network virtual connection interface system
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