Matches 151 - 193 out of 193 < 1 2 3 4
Match Document Document Title
5389882 LAN measurement apparatus for determining voltage between packets  
An LAN parameter measuring instrument is provided for measuring at least one physical parameter of a wired, packet based, baseband LAN. The instrument comprises input means for providing a...
5383178 Network commentator  
Disclosed is a system that monitors a local area network by receiving all messages transmitted over the local area network, and analyzing selected sequences of messages to determine if certain,...
5379278 Method of automatic communications recovery  
In a local area network system having redundant communication media and a plurality of nodes, each node is connected to the redundant communication media. Each node is capable of communicating with...
5365509 Method and apparatus for analyzing nodes on a computer network  
Disclosed is a system that monitors the signal strength of each transmission by a node on a LAN cable of a local area network and determines the location of the node sending the signal. This system...
5363366 Token ring local area network testing apparatus for obtaining beacon domain information  
A token ring local area network (LAN) testing apparatus is provided. The apparatus includes hardware and software for keeping track of information related to the origination of a beacon frame that...
5363493 Token ring network test device using finite state machine  
A system that monitors a local area network by receiving all messages transmitted over the local area network, and analyzing selected sequences of messages to determine if certain, architecturally...
5341363 Computer system capable of disconnecting itself from a lan  
A computer system connected to a LAN is provided with a failure detecting section that detects a network failure by checking received packets from the LAN for a particular packet that may cause or...
5339314 Packet data transmission unit having occupied, idle, and released states therefor  
A data transmission unit for use in a system wherein data to be transmitted is organized into packets which are assigned one of three states: idle, occupied, or released, and transmitted among...
5329519 Lan monitoring method and apparatus  
A monitoring device detects late packet collision on a CSMA/CD LAN. The device comprises a first detector for detecting the presence of a packet in the LAN, a second detector for detecting the...
5327534 Detection of duplicate alias addresses  
A duplicate address condition in a computer network may be detected by a station of the type for attachment to a computer communications network, the network capable of maintaining communications...
5307340 Multipath transmission system with a troubleshooting arrangement for detecting failure  
A multipath transmission system according to the present invention comprises a plurality of multiplex nodes connected to two multiplex buses. Each of the multiplex nodes is assigned to a specific...
5289460 Maintenance of message distribution trees in a communications network  
Each node in a multinode communication system is provided with programming to act as a Set Manager for a given set of nodes and users. Functions of the Set Manager include operation processes for...
5283571 Testing a communications network for duplicate station addresses  
An apparatus to detect stations having duplicated addresses, the stations of the type connected in a computer communications network, the stations of the type capable of having an assigned address...
5282200 Ring network overhead handling method  
A method and system for handling transport overhead on a ring network. The system includes a ring network having a plurality of network elements communicating a signal along the network. In one...
5276440 Network device information exchange  
A network has a plurality of devices connected together in pairs. When a physical connection between a pair of devices is initiated, the devices exchange information regarding a unique device...
5265103 Data communications system  
A data communications system comprises a number of interconnected nodes. Messages from the nodes are grouped into frames, and the frames are delivered to all the nodes in the same sequence....
5229988 System and method for distinguishing proxy replies of interconnecting devices from duplicate source address replies of non-interconnecting devices on a network  
System and method for distinguishing duplicate source address replies caused by interconnecting devices connected to a local area network and duplicate source address replies caused by...
5200949 Link changeover control system for local area network of broadcasting arrangement  
A link changeover control system for a LAN of a broadcasting arrangement has one master supervisor node station and a plurality of normal node stations connected by an active LAN link path and...
5189541 Method and apparatus for connecting branch networks with a trunk network in optical transmission system  
In an optical transmission system including a trunk LAN having duplex optical transmission lines, and branch LANs connected with the trunk LAN through nodes, an optical signal on the optical...
5179341 System and method for detecting an improper termination and a short circuit in a network  
A system and method for detecting an improperly terminated network for networks using a collision detection access scheme. Embodiments of the present invention also contemplate a system and method...
5142526 Transmission failure diagnosis apparatus  
A transmission failure diagnosis apparatus for use in a multiplex transmission system which sends and receives data by time division communication among a plurality of nodes connected by a common...
5115199 Fault detecting system for duplexing type local area networks  
In a fault detecting system suitable for the carrier band type LAN regulated by IEEE, and employed in each of stations coupled with each other via LAN, there are provided: a signal trail detector...
5111460 Process for the localization of defective stations in local networks and associated interface controller  
A process for the localization of defective stations in local networks which consist of several locally distributedly operating stations is proposed, particularly for use in automobiles. The...
5103446 Local area network adaptive throughput control for instantaneously matching data transfer rates between personal computer nodes  
An adaptive throughput control for controlling the transfer of individual bytes of a message communicated between network controllers of adapters at nodes of a LAN enhances or maximizes the rate of...
5097469 Passive monitor for broadcast communication network  
The invention is a network monitor that passively detects sequences of control frame transmissions. Detected control frame sequences are compared to a model of the expected exchange of control...
5079759 Multiplex transmission system for vehicles having a failure diagnosis function  
In a multiplex transmission system for vehicles a transmission path is made usually in the form of a loop, where one master-like supervisory node and a plurality of slave-like ordinary nodes are...
5040175 Wireless information transmission system  
A wireless local area network (10) includes a plurality of stations (12) adapted to transmit and receive message packets via a distribution system (30). In a time division multiplexing embodiment...
5036318 Modular ISDN communication system with formation and display of error texts  
Error information are formed in respectively assigned dependability system sub-modules from error reports of program control modules in a job-oriented manner and are transmitted to a system...
5008662 Remote supervisory and controlling machine  
A remote supervisory and controlling system for remotely supervising and controlling loads in time-divisional multiplex transmission of control unit and monitor data between a central control and...
RE33521 Method and apparatus for detecting a faulty computer in a multicomputer system  
In a method of controlling a multicomputer system which includes a plurality of computers connected to a common transfer bus, each of the plurality of computers decides whether or not the adjacent...
4953162 Multipath local area network  
A local area network which is multi-path in nature and uses many small programmed nodes interconnected by low bandwidth cables with a typical data transfer rate of 9600 BPS. Connections between...
4945532 Local network testing using carrier sense multiple access and collision detection (CSMA/CD)  
A tester for local networks of the carrier sense multiple access and collision detection type with a bus architecture transmission system. The network includes at least one elementary segment...
4893340 Multijunction unit apparatus for use in a digital network  
Disclosed is an adaptive multijunction unit apparatus for multiplexing data streams between a master computer and a plurality of slave computers coupled through telephone system communication...
4847837 Local area network with fault-checking, priorities and redundant backup  
A redundant error-detecting and correcting local area networked computer system (10) having a plurality of nodes (16) each including a network connector board (20') for connecting to an interfacing...
4835763 Survivable ring network  
A survivable ring network is disclosed that can withstand a cut link or failed node, without the need for a central controller or protection switching among links. The disclosed invention comprises...
4825208 Method for flow control of data within a meshed data network  
A method for flow control of data exchanged via nodes connecting an origin and a destination to one another, in which the nodes are arbitrarily meshed within a data network and are connected to one...
4797901 Circuit arrangement for testing a passive bus network with the carrier sense multiple access with collisions detection method  
A circuit arrangement is provided for testing a passive bus network system which comprises stations which are connectible to a coaxial cable segment via media adapter units, the stations realizing...
4792946 Wireless local area network for use in neighborhoods  
A local area network for digital information transmission to and from each of a plurality of building units in an area, such as homes in a neighborhood is provided, wherein all connections between...
4703486 Communication data encoder/decoder component system architecture  
A code conversion system is described for converting a stream of data between first and second data codes. The stream of data containing data packets is recognized to be subject to a data fault...
4546467 Monitor for transmission line  
A monitoring device for monitoring the status of communication units connected to a common transmission medium. The monitoring device sequentially addresses each communication unit and transmits to...
4225753 Data transmission systems  
In a closed-loop multiple data terminal data transmission system, each message includes in addition to a message portion, a prefix portion having at least the address of the terminal for which the...
4058681 Information transmission system  
An information transmission network in which a plurality of information processing stations are connected in parallel to a bus line is disclosed. Each station has a communication control means and...
3564145 SERIAL LOOP DATA TRANSMISSION SYSTEM FAULT LOCATOR  
Terminals in a serial loop data transmission system automatically monitor input data to detect no data and mutilated data conditions. When either condition is detected, signals including the unique...
Matches 151 - 193 out of 193 < 1 2 3 4