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)
02/1983
02/03/1983WO1983000412A1 Idle time slot seizure and transmission facilities for loop communication system
02/01/1983US4371871 Alert message communication system
01/1983
01/25/1983US4370744 Time division multiplex communication system
01/25/1983CA1140239A1 Input-output interface device between a switching exchange and a plurality of transmission channels
01/20/1983WO1983000270A1 Processor facilities for integrated packet and voice switching
01/20/1983WO1983000238A1 Connecting unit for a ring bus
01/18/1983CA1139868A1 High speed data switching node
01/12/1983EP0069382A1 Loop type data highway system
01/11/1983US4368512 Advanced data link controller having a plurality of multi-bit status registers
01/05/1983EP0068865A1 Processor facilities for integrated packet and voice switching
12/1982
12/28/1982US4366557 Circuit arrangement for the recognition of predetermined binary valves of a specific minimum duration
12/28/1982US4366480 Demand driven access mechanism
12/28/1982US4366479 Control information communication method and system through a common signal transmission line
12/28/1982CA1138553A1 Distributed multi-port communications system
12/22/1982EP0067431A2 Network with a number of optical signal transmission lines interconnectable by optical mixers
12/21/1982US4365331 Multiple channel data communication system
12/21/1982US4365329 Process and device for phasing a local clock
12/21/1982US4365328 Device for switching digital data
12/21/1982CA1138079A1 Device for switching signals by optical means and switching units incorporating this device
12/21/1982CA1138071A1 Digital data communication system
12/21/1982CA1138070A1 Bi-directional catv data transmission and control system
12/14/1982CA1137584A1 Multiprocessor system for the processing of digital data
12/09/1982WO1982004366A1 Method and device for the asynchronous series communication or the multipoint type of a plurality of logic transceivers
11/1982
11/25/1982WO1982004145A1 Method and arrangement for distribution of send permission to terminals in a telecommunciation network
11/24/1982EP0065377A1 An apparatus for conforming the length of a data stream to a transmission line
11/23/1982US4360912 Distributed status reporting system
11/23/1982CA1136284A1 Digital loop switch for controlling data information having differing transmission characteristics
11/17/1982EP0064818A1 Data collision avoidance method
11/16/1982US4359731 Communication link contention resolution system
11/10/1982EP0064347A1 Local network interface for use in multi-station word processing system and a data communications network
11/10/1982EP0064262A1 Method and arrangement for the production of selecting signals in teleprinters
11/10/1982EP0064261A1 Method and arrangement for the production of selecting signals in teleprinters
11/10/1982EP0064260A1 Method and arrangement for the production of selecting signals in teleprinters
11/09/1982US4358825 Control circuitry for data transfer in an advanced data link controller
11/02/1982CA1134930A1 Method and device for routing a packet-switched communication network
10/1982
10/28/1982WO1982003740A1 Data processing system employing broadcast packet switching
10/28/1982WO1982003739A1 Data processing system having dual-channel system bus
10/20/1982EP0062960A1 Method of controlling data transmission and reception in a local communication network, and data transmission system for the application of the method
10/19/1982US4355385 Multiplex information handling system
10/19/1982CA1134003A1 Central station alarm system
10/13/1982EP0062347A1 Message communication method and system
10/13/1982EP0062333A2 Multicomputer system and transmission control method therefor
10/12/1982US4354267 Data transmission system utilizing loop transmission lines between terminal units
10/12/1982US4354261 Circuit arrangement and method for multi-address switching operations
10/12/1982US4354229 Loop initialization mechanism for a peer-to-peer communication system
10/12/1982US4354226 Communication terminal for interconnecting programmable controllers in a loop
10/05/1982CA1133154A1 Digital bus communications system
09/1982
09/29/1982EP0061391A1 TDMA system network, especially receiving part of a coupler for the access to such a network
09/29/1982EP0061224A1 System for radio teleprinter traffic
09/29/1982EP0060921A1 Circuit for linking together telex subscribers connected to a data switching exchange and teletex subscribers also connected to the data switching exchange
09/28/1982US4352201 Data transmission system
09/28/1982US4352180 Digital time-division multiplex telecommunication system
09/28/1982US4352103 Industrial control system
09/22/1982EP0060517A1 Multiple access system of terminals on a digital telephone line
09/22/1982EP0060307A1 Method for connecting or disconnecting selected stations in a ring communication system, and ring communication system including selectively connectable stations
09/21/1982US4351049 Circuit arrangement for user stations in a communications network
09/15/1982EP0060067A1 Multi-station token pass communication system
09/07/1982CA1131366A1 Data processing transceiver circuit
09/01/1982EP0059149A1 Time division multiplex switching network for multiservice digital networks
09/01/1982EP0058760A1 Circuit arrangement for connecting analog-signal transmitting devices with analog-signal receiving devices through a TDM-data exchange
09/01/1982EP0058758A1 Circuit for receiving and transmitting relatively high speed data signals in a data switching network
08/1982
08/31/1982US4347602 Circuit arrangement for time division multiplex data transmission with a bus system
08/31/1982US4347563 Industrial control system
08/31/1982US4347498 Method and means for demand accessing and broadcast transmission among ports in a distributed star network
08/25/1982EP0058573A1 Data transmission system with transmission links joined in a ring
08/25/1982EP0058241A1 Method and circuit for the transmission of data signals and signalling information between data terminal equipment, which is interconnected through the exchanges of a telecommunication network
08/24/1982US4346440 Advanced data link controller
08/24/1982CA1130408A1 Port logic for a communication bus system
08/19/1982WO1982002809A1 Improved autonomous terminal data communications system
08/19/1982WO1982002784A1 Data communications network
08/17/1982US4345250 Information communication system with collision avoidance
08/11/1982EP0057628A1 Time division digital switching system for channels in circuit and packet mode
08/11/1982EP0057534A2 Telegraphic communication system
08/03/1982US4343042 Bi-directional data transmission and control system
08/03/1982US4342995 Data network employing a single transmission bus for overlapping data transmission and acknowledgment signals
07/1982
07/20/1982US4340961 Distributed multi-port communications system
07/20/1982US4340776 Modular telecommunication system
07/20/1982US4340775 Apparatus and method for controlling a modular telecommunication system
07/13/1982CA1127770A1 Method and device for speech signal reconstruction in packet switched telecommunication networks
07/07/1982EP0055674A1 Packet-based telecommunication network
06/1982
06/29/1982US4337465 Line driver circuit for a local area contention network
06/29/1982CA1126833A1 Digital loop synchronization circuit
06/23/1982EP0054077A1 Method of transmitting information between stations attached to a unidirectional transmission ring
06/16/1982EP0053638A1 Current mode data or power bus
06/15/1982US4335456 Switch-through unit for bit groups within a program controlled, electronic data switching system
06/15/1982US4335426 Remote processor initialization in a multi-station peer-to-peer intercommunication system
06/09/1982EP0053212A1 Multichannel modem and its utilization in a process and system for testing a communication network with several levels
06/08/1982US4334306 Transparent intelligent network for data and voice
06/08/1982US4334305 Data-handling system with operatively interconnected processors
06/08/1982CA1125404A1 Method for generating a pseudo-signal in an error rate supervisory unit and circuit for carrying out the same
06/02/1982EP0052956A1 A bus access circuit for high speed digital data communication
06/02/1982EP0052720A1 Current supply arrangement for a text station
06/01/1982US4333178 Optical fiber repeater
06/01/1982CA1124879A1 Digital data communication network having differing data transmission rate capabilities
06/01/1982CA1124813A1 Receive/bypass circuit for subsystems in polling system
05/1982
05/26/1982EP0052456A1 A shared-line communication system, and components therefor
05/26/1982EP0052390A1 Method of maintaining the functioning aptitude of a digital information transmission arrangement, and its application
05/25/1982US4332027 Local area contention network data communication system
05/25/1982US4331835 Interface unit for a modular telecommunication system
05/25/1982US4331834 Made by dissolving polymer particles contained in a concrete coating to form pocks
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