| Patents for H04L 12 - Data switching networks (448,999) |
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| 03/14/1989 | US4813012 Terminal access protocol circuit for optical fiber star network |
| 03/14/1989 | US4812839 System for controlling network activation sequence |
| 03/14/1989 | US4812805 System for interconnecting parking meters having a memory |
| 03/08/1989 | EP0306291A1 Communications switch |
| 03/08/1989 | EP0306059A2 Telemetry system with signal booster for digital data transmission through a transmission line |
| 03/08/1989 | EP0305554A2 Optical star bus with an active coupler |
| 03/08/1989 | EP0305516A1 Apparatus and method for providing a wireless link between two local area network systems |
| 03/08/1989 | CN1031615A Device and method for storage characteristic parameter of locally area network system |
| 03/08/1989 | CN1003553B Data subsystem traffic control apparatus and method |
| 03/07/1989 | US4811366 Start pattern detecting apparatus |
| 03/07/1989 | US4811339 Non-coded information and companion data switching mechanism |
| 03/07/1989 | US4811338 System for adjusting signal transmission timing to prevent signal collisions |
| 03/07/1989 | US4811337 Distributed load sharing |
| 03/07/1989 | US4811009 Transmission control system |
| 03/07/1989 | US4810898 RF network isolation switch |
| 03/07/1989 | CA1250969A1 Network signalling protocol for communications system |
| 03/07/1989 | CA1250936A1 Adaptive packet/circuit switched transportation method and system |
| 03/07/1989 | CA1250935A1 Dynamic bandwidth allocation mechanism between circuit slots and packet bit stream in a communication network |
| 03/07/1989 | CA1250918A1 Serial link communications protocol |
| 02/28/1989 | US4809363 Method for automatic level matching in a local network, in particular a multicomputer arrangement, comprising a bus system having light waveguides, for the purpose of collision recognition |
| 02/28/1989 | US4809362 For engagement with a beverage bottle cap |
| 02/28/1989 | US4809361 Optical composite transceiver |
| 02/28/1989 | US4809268 Multipoint data communication with a supervisory system for detecting a malfunctioning remote station |
| 02/28/1989 | US4809267 Packet data communication system with ring type transmission line |
| 02/28/1989 | US4809265 Method and apparatus for interfacing to a local area network |
| 02/28/1989 | US4809264 Collision signal detection system |
| 02/28/1989 | US4809257 For interconnecting data handling units by infrared signals |
| 02/28/1989 | CA1250673A1 Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels |
| 02/28/1989 | CA1250649A1 Method and apparatus for telecommunications signal processing and switching |
| 02/28/1989 | CA1250648A1 Variable length packet switching system |
| 02/23/1989 | DE3726660A1 Optical fibre transmission system |
| 02/22/1989 | EP0304023A2 Bit oriented communications network |
| 02/22/1989 | EP0303991A2 Method of packetizing data |
| 02/22/1989 | EP0303830A2 Multicast data distribution system |
| 02/22/1989 | CN1031305A Base station for wireless digital telephone system |
| 02/21/1989 | US4807249 Circuit arrangement for serial data transmission between a plurality of subscriber stations |
| 02/21/1989 | US4807231 Multiplex communication method |
| 02/21/1989 | US4807226 Secondary station operable in a data communication network like a primary station upon occurrence of a fault |
| 02/21/1989 | US4807224 Multicast data distribution system and method |
| 02/21/1989 | US4807223 Communications protocol for distributed station network |
| 02/21/1989 | US4807222 Cordless accessed high-speed high-capacity local area networks |
| 02/16/1989 | DE3726742A1 Interference monitoring circuit for a local area network |
| 02/15/1989 | EP0303407A2 Crosstalk reduction in unshielded twisted-pair lines |
| 02/14/1989 | US4805170 Data communication network |
| 02/14/1989 | US4805169 Local area network operating on the multiple bus system |
| 02/14/1989 | US4805168 Local area communication network |
| 02/14/1989 | CA1250065A1 System for controlling network activation sequence |
| 02/14/1989 | CA1250034A1 Portable testing device for monitoring communication line activity |
| 02/09/1989 | WO1989001266A1 Apparatus and method for storing performance parameters of local area network system members |
| 02/08/1989 | EP0302646A2 Device for establishing and controlling virtual networks |
| 02/08/1989 | CN1031003A Protocols for very high-speed optical lans |
| 02/07/1989 | USH586 ISDN D channel handler |
| 02/07/1989 | US4803699 Bus apparatus with a plurality of transmitters |
| 02/07/1989 | US4803681 Data transmission control system |
| 02/07/1989 | US4803485 Lan communication system and medium adapter for use therewith |
| 02/07/1989 | CA1249866A1 Routing mechanism with encapsulated fcs for a multi- ring local area network |
| 02/01/1989 | EP0301934A1 Time-division switching system for packets of different lengths |
| 02/01/1989 | EP0182812B1 Distributed packet switching arrangement |
| 02/01/1989 | CN1030834A Bus transmitter having controlled trapezoidal slew rate |
| 01/31/1989 | US4802189 Method and circuit arrangement for the transmission of data signals between subscriber stations of a data network |
| 01/31/1989 | US4802161 Packet bus interface |
| 01/26/1989 | DE3815779A1 Transfer of state data of peripherals - has ring passing around peripheral group modules with group and peripheral addressing |
| 01/25/1989 | EP0300942A1 Switching system for data packets with priorities |
| 01/25/1989 | EP0300941A1 Switching system for informations with priorities |
| 01/25/1989 | EP0300876A1 Hybrid time-division multiplex switching system with an optimized buffer memory |
| 01/25/1989 | EP0300778A2 Ring shaped local area network |
| 01/25/1989 | EP0300609A2 Ring shaped local area network |
| 01/25/1989 | EP0300606A2 Ring shaped local area network |
| 01/25/1989 | EP0300350A2 Communication system |
| 01/25/1989 | EP0300061A1 Self-routing switching system |
| 01/25/1989 | CN1030679A Communications system and components and methods for use therein |
| 01/24/1989 | US4800559 Ethernet and broadband lan interface |
| 01/24/1989 | CA1249341A1 Optical local area network employing microwave modulation techniques |
| 01/18/1989 | EP0299749A2 Multi-slot access system |
| 01/18/1989 | EP0299473A2 Switching system and method of construction thereof |
| 01/18/1989 | EP0299251A2 Communication filter |
| 01/18/1989 | EP0298979A1 Workstation for use with a digital image communications network |
| 01/17/1989 | US4799256 Telecommunication signalling arrangement |
| 01/17/1989 | US4799236 Telecommunication system comprising a bus conductor and telecommunication stations connected to this bus conductor through transformers |
| 01/17/1989 | US4799219 Pseudo synchronous transport mechanism in a communication network |
| 01/17/1989 | US4799218 Network system |
| 01/17/1989 | US4799215 High-speed packet-switched communications system with end-to-end flow control and retransmission |
| 01/17/1989 | US4799211 Apparatus and method for storing performance parameters of local area network system members |
| 01/17/1989 | US4799052 Method for communicating data on a communication network by token passing |
| 01/12/1989 | WO1989000368A1 Device for potential-free transmission of data |
| 01/12/1989 | WO1989000366A1 Non-blocking copy network for multicast packet switching |
| 01/11/1989 | EP0181371B1 Integrated packet switching and circuit switching system |
| 01/10/1989 | US4797901 Circuit arrangement for testing a passive bus network with the carrier sense multiple access with collisions detection method |
| 01/10/1989 | US4797882 Mesh-based switching network |
| 01/10/1989 | US4797881 Bridge system for connecting networks |
| 01/10/1989 | US4797880 Non-blocking, self-routing packet switch |
| 01/10/1989 | US4797879 Packet switched interconnection protocols for a star configured optical lan |
| 01/10/1989 | US4797878 Multiple virtual multipoint modem using TDM/token throwing technique |
| 01/10/1989 | US4796815 Variable-spray shower head |
| 01/10/1989 | CA1248602A1 Distributed time division multiplexing bus |
| 01/10/1989 | CA1248588A1 Intranetwork and internetwork optical communications systems and method |
| 01/05/1989 | DE3720626A1 Method for determining the utilisation time on direct data links using the method of envelope-comparable frame analysis, in which, by means of a sensor, a recording grid is laid over the data stream flowing to or from a data terminal device and a predefined number of consecutive bit groups are measured and compared with one another, and a sensor to carry out the method |
| 01/04/1989 | EP0297629A2 Communications systems |
| 01/04/1989 | EP0297492A2 Method of testing a network structure |
| 01/04/1989 | CN1030168A Call monitor arrangement |