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5606551 |
Bidirectional mesh network
A communication network called a bidirectional mesh network (MSN), also called bi-MSN, is described. The bi-MSN includes a plurality of first communication loops (horizontal loops) each comprising...
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5603086 |
Dynamic address allocation within RF trunking multisite switch
A multisite network switch for a series of RF digital trunked radio transceivers and dispatcher consoles. The switch establishes audio communications between different sites and various dispatcher...
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5602838 |
Global multi-satellite network
A global satellite communication network is described. The global satellite communication network comprises a plurality of polar communication loops and a plurality of longitudinal communication...
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RE35449 |
Remote 2-way transmission audience polling and response system
A remote response system includes a central control unit and a plurality of remotely-located response units each having keypads for entering a selection from a user. The central control unit...
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5598149 |
Commercial-size, automatic industrial plant having several parts
A common automation system for various partially interacting plant parts of a commercial-size, automatic industrial plant, and in particular, of a primary industrial plant such as a coke oven. The...
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5598150 |
Polling communication system
A parent node transmits a third specific message to child nodes as a broadcast message if a first specific message indicating the start of the child node collides with another message so that...
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5594871 |
Data communication method and data communication system using data communication apparatus therein
The data communication system according to the present invention executes data transmissions and data receptions between a main unit and a plurality of terminals by the polling/selecting method....
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5592437 |
Data collection and relay circuit for towed hydrophone array
Disclosed is a programmable data collection and relay circuit for a towed hydrophone array. The circuit is designed to prepare data concerning operation of the array to be interleaved with...
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5586269 |
Communication control device and method for automatically determining a self-address
A communication control device and method for an information transmission system which can set automatically its self-address. When the device is connected to the system, candidate values set as...
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5585789 |
Data communication apparatus
A data communication apparatus has a RAM for storing address information concerning a plurality of destinations (e.g., data for telephone directory, name card management, or the like), and the...
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5586056 |
Remote monitoring system using a polling level table and a monitored station number table
A data transmitter/receiver of a centralized monitoring station transmits data and receives data from each of monitored stations. A polling level table stores polling levels calculated from request...
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5583477 |
Wireless AC/DC bell
A wireless AC/DC bell which includes a transmitter circuit, which includes a battery power source, an indicator light, a modulation transistor, and an amplifier, and a receiver circuit, which...
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5581707 |
System for wireless collection of data from a plurality of remote data collection units such as portable bar code readers
In order to collect data messages at a base station which is in radio communications with portable data collection terminals, such as bar code readers, that may move between different locations,...
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5576702 |
Method and apparatus for fault-tolerant transmission in multi-channel networks
A method and apparatus are disclosed for transmitting in multi-channel fault-tolerant networks with bus, star, ring or mixed topology and multi-priority medium capacity distribution by medium idle...
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5576698 |
Physical addressing of modules
An array of like system modules linked to a common control unit by connect lines, bussed and connected to all the modules by respective removable pin units so that each module address can be...
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5574947 |
Data communication cable for a data terminal for simultaneously connecting multiple peripheral devices and selecting the peripheral devices based on data rate
A splitter cable provides a means for simultaneously connecting a data terminal's communications port to a plurality of peripheral devices. The cable provides for the flow of data between the data...
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5561412 |
Patient/nurse call system
A patient/nurse call system for a hospital includes patient stations capable of generating hospital calls and a remote master station which prioritizes and stores the calls. Hall units outside...
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5561813 |
Circuit for resolving I/O port address conflicts
An input/output port address selection circuit for a device that couples to a local bus of a computer operates in two modes. In a first mode, the I/O port address is maintained as the last I/O port...
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5559962 |
Data transmission system selecting both source and destination using addressing mechanism
A data transmission system includes a main controlling unit for producing pieces of address information, each piece of address information being indicative of a first address for a data source and...
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5559503 |
Communications device for initializing terminals in a signal distribution system
Signal distribution systems, such as interactive cable television systems, wherein a central server that communicates with remote terminals wherein the server assigns a specific address to each...
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5555192 |
Detection of duplicate identification codes in communication units
A monitoring computer (115) monitors the communications occurring within at least one communication system for a unique communication unit identification (ID) code associated with a communication...
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5554968 |
Data communication using power lines
The apparatus uses electric power lines to send and receive command, control, and data signal structures. Message signals are superimposed upon the AC power signals present on existing power lines....
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5544037 |
Control arrangement for consumer units which are allocated to groups
There is disclosed a control arrangement for plural consumer units allocated to groups for operation by means of operating elements connected with at least one group address control transmitter....
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5543785 |
Distributed multi-outlet paging
A distribution network 108 receives simplex communications or pages from any number of user interface nodes (UINs) (202) and distributes the pages to one or more paging outlets provided by page...
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5544164 |
Method and cell based wide area network alternative access telephone and data system
The present invention is a Wide Area Network (WAN) Asynchronous Transfer Mode (ATM) compliant cell based communications system that is capable of delivering high data rate cells from a plurality of...
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5541928 |
Communication system which establishes communication sessions based on unit ID codes to avoid transmission conflicts
A communication system between a host station and a plurality of substations eliminates the possibility of a connection failure between the host and a given substation by attempting to establish a...
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5539390 |
Method for setting addresses for series-connectd apparatuses
A method for setting addresses in a system including a controller for controlling transmission and reception of information signals, and a connection apparatus for connection to a succeeding...
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5539393 |
Information system
An information system comprises a master station (2, 10) controlling information to be displayed on a number of information units (30, 40) arranged remotely from said master station. The master...
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5539389 |
Enhanced group addressing system
An apparatus and a method for addressing a plurality of spaced-apart detectors or control units in a multiple zone detection system shortens the time needed for a centrally located control element...
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5536981 |
Circuit card mounting shelf apparatus having automatic identification number setting function
A circuit card mounting shelf apparatus having an automatic identification number setting function by which the identification number of a circuit card can be set automatically without the...
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5537104 |
System for equipment control, comprising a common communication channel
A system for equipment control comprises a plurality of equipment units and actuator units. These units are linked by a common communication channel, for example a wired bus. Each of the units has...
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5535336 |
Apparatus and method for enabling a network interface to dynamically assign an address to a connected computer and to establish a virtual circuit with another network interface
A network provides the capability for information transfer and resource sharing between a plurality of nodes including computers and peripheral devices. The network is comprised of a plurality of...
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5530435 |
Utility distribution system for modular furniture and the like
A utility distribution system is provided for modular furniture of the type comprising individual furniture units which are juxtaposed to form one or more workstations. A signal conductor is...
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5530896 |
Appliance control process for matching slave units to control units and for automatically assigning addresses to the slave units
An automatic determination of an address suitable for a functional unit connected to other similar functional units via a bidirectional communication network. A field of possible addresses are...
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5530897 |
System for dynamic association of a variable number of device addresses with input/output devices to allow increased concurrent requests for access to the input/output devices
Disclosed is a data processing system for presenting concurrent requests for access to peripheral devices up to the number of subchannels available for handling input/output operations. A computer...
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5530436 |
Method of communications between master unit and slave unit with efficient protocol
A method of communications between a master unit and a slave unit of a supervisory control and data acquisition system is provided. The communications protocol has at least two bytes of data where...
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5528215 |
Building automation system having expansion modules
A building automation system is disclosed which enables reliable operation and cost effective expansion. The system utilizes pairs of complementary modules, one of which is a primary module that is...
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5526489 |
System for reverse address resolution for remote network device independent of its physical address
A reverse address resolution protocol for use in a communication network which allows resolution logic to provide a higher level protocol information (such as an IP address) to a source of a...
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5517500 |
Packet handling method
An improved network interface architecture for a packet switch provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic...
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5515034 |
Simple communication system capable of message broadcasting
In a communication system for a plurality of terminals, a terminal control unit is connected between a call control unit and the terminals. The terminal control unit is associated with a memory...
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5512885 |
Control of data communication in networks with closed user groups
A method for supervising and controlling the information transfer between two or more categories of users of a data network with closed user groups. Users, belonging to a first category of users,...
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5508695 |
Method and apparatus for identifying messages associated with a sports team in a communication system
A communication system (100) for identifying messages concerning particular sports teams includes a terminal (105) for transmitting a message about a sports event as a radio frequency signal. A...
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5504866 |
Lan control system
A LAN control system including an information processing device and a plurality of LAN control sections. Each of the control sections stores a self-address, an other party address, and an other...
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5502818 |
Procedure for the determination of message identification in the data transmission network of an elevator system
A procedure is disclosed for determining the message identifiers in a control area network CAN data transmission network of an elevator system where message identifiers are used in the transmission...
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5502438 |
Address management for remote terminals in digital loop transmission systems
Disclosed is a method and apparatus for identifying remote terminals which are networked in a digital loop transmission system. A Site Interface Unit (SIU) at one of the remote terminals acts as a...
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5500852 |
Method and apparatus for network variable aliasing
A method and apparatus for resolving connection conflicts in a network is provide. A network connection point on a node cannot be added to a first network connection when it already belongs to a...
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5499018 |
Local communication bus system and apparatus for use in such a system
A number of domestic audio/video apparatuses (10-14) are connected to a serial control bus (D2B, 16). Each apparatus is addressable via the bus as a device and contains functional elements...
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5495406 |
Load control system
An improved luminaire load control system for handling control signals as by converting them into power line carrier communication signals which are transmitted through branch power lines to...
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5495240 |
Master-slave data transmission system employing a flexible single-wire bus
A master-slave data transmission system employs a flexible single-wire bus and where any master unit can send data to or read data from any slave at a single time. Data transfer is accomplished by...
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5493287 |
Method of remotely reading a group of meters
A remote meter reading system (10) includes a group of meter interface units in which each meter interface unit (12) is operable in an inactive state, and in which each meter interface unit (12) is...
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