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5130983 Method of polling to determine service needs and the like  
Tis method provides high utilization collision free access to a digital pulse communications medium with priority provided by message class and/or terminal type, regardless of network topology....
5121382 Station-to-station full duplex communication in a communications network  
The present invention provides a method and apparatus for establishing point-to-point full duplex communication between two stations served by a local area network (LAN) or connected by a...
5107257 Bus relay apparatus for multi-data communication processing system  
A bus relay apparatus includes a counting unit and a switching unit. The counting unit counts polling signals transmitted from a bus controller present in a first group of a plurality of grouped...
5101199 Polling method and apparatus  
When an interrupt request to a control unit occurs, the control unit polls a plurality of interrupt request terminal interfaces to locate which of the interrupt request terminal interfaces has...
5093829 Communication system network  
The present invention discloses a communication system network that comprises a plurality of communication systems and a processing multiplexer. The communication systems, which may be either...
5090012 Multiplex transmission system for use in a vehicle  
A multiple transmission system for use in a vehicle, in which a second node having a control function sends an command to first nodes of an ordinary type when an transmission error higher than a...
5090013 Time slot protocol in the transmission of data in a data processing network  
A data processing network having a host computer, a plurality of terminals, a cable for transmitting data between the host computer and the terminals, and a controller for controlling character...
5068850 Parameter value communication system  
A multipoint communications system for transmitting the values of a multiplicity of analog parameters from one point digitally to another point and reconverting then into analog parameters. The...
5061922 Method of monitoring changes of state of a power transmission system by interruption signal transmission  
A signal transmission/monitoring method for a system including a master station and a plurality of slave stations installed on and along a signal transmission line so as to be capable of mutually...
5060226 Telecommunications network test system  
A telecommunications line test system wherein a digital telecommunications network is electronically sectionalized via at least one master test unit in combination with at least one remotely...
5048013 Transmission congestion control method and apparatus  
A congestion control method and apparatus for use with a communications link comprising a plurality of N channels. A plurality of at most N-1 queues are sequentially polled, and data is output...
5038140 Supervisory system in communication system  
In a communication system wherein repeater stations and terminal stations are connected in tandem, a supervisory system in which a logical hierarchical configuration is used for the transmission...
5032833 Adaptive network routing for power line communications  
Optimum routing for communications between a central control unit (CCU) and remote units (nodes), such as electricity meters, distributed on an electrical power line is established by broadcasting...
5027341 Station line switching control system  
A station controller for use in a telephone system includes a plurality of digital telephone stations comprising one or more multi-station pick up groups, each having a primary station and one or...
5023867 Protocol and apparatus for selectively scanning a plurality of lines connected to a communication device  
A scanning protocol is provided for the scanning of a plurality of serial transmission lines connecting users' devices to the scanning means of a communication device, said lines being coupled to...
5010329 Block polling data communication system having optimum block determination means  
An improved data communication system in which a block polling of a plurality of terminal blocks is first carried out, thereafter, a terminal polling of terminals in the terminal block(s) from...
4995033 Digital private branch exchange and method of manufacturing same  
A digital private branch exchange including a digital trunk which in turn includes a connection request reject channel and a method of controlling the exchange. If there is a connection request to...
4972184 Polling system for use in an audio system  
A polling system for use in an audio system in which a plurality of controllers for controlling a plurality of input/output devices of the audio system and a system controller for controlling the...
4965694 Remote controlled circuit breaker system  
A common power supply (20) is often used to provide power for actuating a plurality of circuit breakers (18a-18z) in response to actuation signals from remote control lines (16a-16z). But a large...
4958381 Two way communication system  
An information transmitting system capable of two way communication, suitable for use in transmitting information signals between a central control unit and a plurality of terminal apparatus...
4951281 Multiplex transmission system  
A multiplex transmission system, in which a node as a transmission node transmits data frame by frame to a transmission path, and a plurality of other nodes, as reception nodes, returns a...
4947162 Terminal device for a monitoring and control system  
In a terminal device adapted to effect transmission and receipt of information through address polling by a central monitoring/control device, an address having a predetermined number of bits is...
4942572 Process and device for high speed polling  
A process is disclosed for efficiently polling low rate data terminals attached to communicate with a central station via a high speed channel. The process is based on the use of a dual rate...
4930118 Frame-interval fault detection in a demand assignment TDMA communication system  
In a demand assignment TDMA communication system, a central station transmits a frame sync and a polling signal at periodic intervals to terminal stations to elicit a response therefrom. Each...
4924461 Polling network communication system having transmission request registration means  
In a sequential polling type communication network system including a master station, a first channel, a second channel, and at least two slave stations, the master station includes request...
4910733 Rendezvous network protocol with reduced bandwidth and processor time  
A network protocol elminates all acknowledge data packets. A health check data packet is broadcast periodically by each node in the network. Each node uses the health check data packets to...
4896209 Passenger vehicle polling system having a central unit for polling passenger seat terminal units  
A passenger vehicle polling system. The system is capable of polling one or more terminal units, where each terminal unit is provided at a different one of a plurality of passenger seats in a...
4890279 Multiplexer and computer network using the same  
An improved computer network multiplexer is disclosed. In a computer network based on the multiplexer, a master computer can communicate with a plurality of slave computers such that each slave...
4887262 Single-channel bus system for multi-master use with bit cell synchronization, and master station comprising a bit cell synchronization element suitable for this purpose  
Messages consisting of an arbitration field followed by a data field circulate in a single-channel bus system. The stations comprise a storage element for an intended delay time between a locally...
4885739 Interprocessor switching network  
A message transport network (10) is provided for high speed switching between processing elements (72, 80). Clusters of low speed processing elements (72) may be connected to the message transport...
4872003 Serial interface system flexibly applicable to a one-to-plurality connection  
In a serial interface system wherein a master unit (26, 27) selects one or more of slave units (26, 27) as a destination by an identification number assigned to each slave unit and transmits a...
H000696 System for accessing shared resource device by intelligent user devices  
A shared resource system (20) is disclosed wherein multiple user devices (24) share a resource device such as a disk drive (36). The multiple user devices (24) are interconnected to the resource...
4868816 Polling communication method  
A polling communication method which asks whether or not there is a request with data from a range of answer requesting terminals. A request is determined by a binary looking-up to terminals by a...
4858230 Multiport/multidrop computer communications  
Multiport/multidrop computer communication is provided over a single communication facility between a plurality of central stations at a central location their respective remote stations at remote...
4847834 Local area network  
A local area network including a controller connected to a transmission medium. A plurality of terminals are connected to the transmission medium to initiate a request for an address. Each of the...
4833672 Multiplex system  
A multiplex system includes a master controller and a plurality of remote stations which are connected together by a cable. The cable is a twin co-ax cable which includes data and clock conductors...
4829297 Communication network polling technique  
In a communication network wherein a master station periodically polls a number of remote stations to determine whether or not each remote station has data to transmit to the master, each of the...
4796025 Monitor/control communication net with intelligent peripherals  
A monitor/control communication net with intelligent peripherals, that is, peripherals which are capable of monitoring and/or controlling various devices in accordance with messages received from...
4796022 Double transit bus system  
A bus system for exchanging information between a plurality of circuits connected to the system. The bus system includes a polling bus, a message bus, and a bus controller. The bus controller...
4796023 Stabilized binary tree protocol  
A binary tree protocol (FIG. 6 for example) in which for any given state in the binary tree, the subsequent state for each right substate is determined by applying the same state logic. In the...
4787082 Data flow control arrangement for local area network  
In a local data distribution network configuration a plurality of bidirectional data distribution busses are each connected to a bus master control circuit at a terminal end of the bus. Connected...
4782483 Data transmission system and method of passing role of primary station  
A data transmission system is described, comprising a number of stations connected together in a ring. One of the stations acts as primary and can send a message at any time. The other stations...
4763323 Communication system for the transfer of small digital message blocks and large digital message blocks  
A communication system for the transfer of small digital message blocks and large digital message blocks. A plurality of nodes are coupled to a common wideband communication channel capable of...
4763320 Method and arrangement for transmitting data, especially in an aircraft  
A method and arrangement for the transmission of data, in digital form, in a bus system, which includes a central unit, several stations, as well as a bus line or data bus. During operation, the...
4751630 Interactive terminal system using a prepoll prior to transferring information from the controller to the work station  
An interactive terminal system transfers information at 750,000 bits per second between a central system and a number of work stations, all coupled in common to a single conductor coaxial bus. The...
4745595 Distributed electronic mailbox system  
The disclosure describes an electronic mailbox system in which a plurality of like data terminals are provided coupled to a common message carrying facility such as a telephone line wherein any...
4744077 Link flow control in time slot protocol data transmission of a data processing network  
In a data processing network using time slot protocol to transmit characters from a host computer to a plurality of users and to transmit a keystroke from a specified user back to the host...
4744024 Method of operating a bus in a data processing system via a repetitive three stage signal sequence  
Disclosed is a data processing system which is comprised of a plurality of devices that carry on conversations with each other over a time-shared bus. These conversions can consist of a message...
4742513 Adaptive window multiplexing technique  
An adaptive window multiplexing technique. A multiplexer is coupled between a single destination and a plurality of data sources. The multiplexer includes control circuitry for sequentially...
4740957 Asynchronous addressable electronic key telephone system  
A high rate of exchange of information between a control station and each one of multiple associated stations in a key telephone system is economically achieved by using a multipurpose computer in...