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5257160 |
Serial signal transmission device and control method for determining polarity
A serial signal transmission device and a control method for determining polarity which can be used in various systems, for example, air conditioners, and a remote controller. The serial signal...
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5117070 |
Data transmission control processing system
A data transmission control processing system comprising the steps of easily realizing the reading, writing of the memories of the other terminals coupled with the above described transmission...
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4939509 |
Data conferencing arrangement for stations having keyboards and displays, using a keyboard buffer and a screen buffer
An arrangement for data conferencing either multiple computers (FIG. 1), or multiple terminals with a computer (FIG. 4), includes software (21;511) for communicating keystrokes from conference...
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4835346 |
Method and device for fast data transmission through a standard serial link
A device for transmitting data between a transmitter provided with standard software adapted to a serial interface and a standard receiver provided with a serial interface is presented. The device...
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4801934 |
Method and apparatus for transmission of data with data reduction
In a transmission network having a tree structure in which data is forwarded from the tree branches toward the trunk at periodic intervals, the data which is transmitted between the several network...
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4786763 |
Circuit arrangement for the transmission of data signals between subscriber terminals operating with different data transmission procedures
A circuit for the transmission of data signals between subscriber terminals operating with different data transmission procedures is described. Data signals are transmitted between a subscriber...
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4760395 |
Arrangement for communications between equipment belonging to different network architectures
A communications network (K) provides the integration of at least two networks with different network architectures, (SNA, DCNA, DECNET). The communications network as such exhibits its own...
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4700021 |
Circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
A system for transmitting data signals between control devices connected to each other by a transmission loop operated directionally dependent has a number of such control devices connected to the...
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4667320 |
Space-division switching network for high data rate signals
A multi-stage space-division switching network comprises groups of regenerators (RE1 to RE16) connected to input lines and to output lines of the switching network, it further includes groups of...
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4570565 |
Method and circuit arrangement for providing date and time information in a telex and data switching system
Date and time information are provided in a telex and data switching system (EDS), which is connected with subscriber stations (Ttx) that are located in different time zones (ZZ1 to ZZ4). The telex...
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4528658 |
Telecommunication system with a multiplicity of modular units interchanging digital messages
A telecommunication system, e.g. a telephone switching exchange, comprises a multiplicity of substantially identical modular units each including a microprocessor controlling the emission of...
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4501930 |
Teleprinter
A teleprinter has a printer for printing received or manually entered characters in a row-by-row fashion. The characters of a row are initially stored, and only following the occurrence of a...
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4497976 |
Method for emitting additional information in conjunction with message signals to be transmitted over a data switching center
Additional information is transmitted, in conjunction with message signals which are transmitted over a data switching center belonging to a public switched network. The data switching center is...
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4479195 |
Data conference system
A communications network having a multiport data conference system is disclosed. The data conference system includes a multilevel processor arrangement with the lower level port processors...
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4477695 |
Microprocessor operated telecommunications interface for a terminal of an automatic teletypewriter switching service
A microprocessor operated telecommunications interface for connection to a telecommunications line to provide transmission of data between a dedicated terminal of an automatic teletypewriter...
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4476347 |
Method and circuit arrangement for transmitting communication signals between switching centers of first and second switching networks operating with different transmission procedures
A method and a circuit arrangement are provided for the transmission of communication signals over switching centers of a first switching network and of a second switching network operating with...
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4466000 |
Data communication system
In a data communication system comprising a plurality of data stations which are interconnected by a common communication medium, simultaneously occurring prospective users of the communication...
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4463351 |
System for providing several data terminals with access to a digital telephone line
A line loop designed for the transmission of digitized voice samples as well as data words between an exchange and several subscriber terminals, not all of them necessarily equipped for voice...
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4454383 |
Asynchronous data transmission method and circuitry
A method and circuitry are disclosed for asynchronously transmitting binary data over a communication pair without the use of start or stop bits. During a non-data transmitting state a quiescent...
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4451697 |
Method for establishing connections between subscriber stations which operate with different transmission procedures by way of signal converters including busy-free control
A method is disclosed for establishing connections from subscriber stations or transmission lines connected to a data exchange system to signal converters. The data exchange system receives...
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4431864 |
Communications system input-output converter
An input-output converter permits the integration of terminals and transmit and receive equipments that operate at given logic voltage levels and character formats into communications system that...
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4430525 |
Circuit arrangement for connecting telex subscriber stations to teletex subscriber stations which are connected to the same data exchange system
A data exchange system is connected to at least one signal converter in which digital signals emitted from teletex subscriber stations are converted so that they may be processed by teletex...
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4410889 |
System and method for synchronizing variable-length messages in a local area network data communication system
This disclosure relates to a system and method for the synchronization of variable-length messages being transmitted between stations of a local area contention network where the messages are made...
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4409593 |
Threshold-less collision detection and bit arbitration in a CFSK data system
In a chirped-frequency-shift-keyed data system, in which a plurality of stations each contain a data transmitter and a data receiver constantly monitoring a common system communications medium even...
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4409592 |
Multipoint packet data communication system using random access and collision detection techniques
In a data communications systems having a communications channel (3) for interconnecting a plurality of transceivers (1) and (2), each of said transceivers (1) and (2) including means (80) for...
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4388489 |
Conversational video system
A video conversational data communication network (30) in which subscribers (34, 35) may conduct conversational video textual data communications with one or more keystations (70, 602, 98) the...
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4379946 |
Signalling system and signal control equipment for multi-address calling
A signalling system for multi-address calling and a signal control equipment therefor in which a control signal starts with a synchronize signal, followed by a function determination field...
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4379294 |
Data highway access control system
An arrangement for permitting communication among a plurality of stations on a single serial data communications bus. Each station is provided a choice between two modes of operation. All stations...
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RE31182 |
Packet-switched data communication system
A packet-switched digital data communication system operable in a store-and-forward mode is provided for enabling substantially simultaneous full-duplex communication between a plurality of...
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4355403 |
Teletypewriter line keyer with switching current regulator
A teletypewriter line keyer with a switching current regulator responsive to a floating, loop current powered voltage comparator used as a loop current monitor. The line keyer, which may have...
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4354261 |
Circuit arrangement and method for multi-address switching operations
A circuit arrangement for multi-address switching operations of digital encoded signals between a calling data terminal and a variety of called data terminals operating with different data...
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4354054 |
Caboose signal controlled reporting arrangement for a regenerator chain
A status reporting arrangement for a digital transmission system (10) has a plurality of stations (11, 12, 13) in a tandem configuration. Each station (such as 11) includes a reporting circuit (30)...
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4346259 |
Low speed terminal interface for all-digital PABX
An interface for synchronizing the output of standard asynchronous terminals with a PABX allows all terminals to operate asynchronously with respect to each other. The output from the I/O terminal,...
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4340776 |
Modular telecommunication system
A modular telecommunication system comprises a plurality of switching blocks and a plurality of inter-connecting lines for interconnecting the switching blocks. Each of the switching blocks...
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4340775 |
Apparatus and method for controlling a modular telecommunication system
A modular telecommunication system comprises a plurality of switching blocks connected in parallel by interconnecting lines. Each of the switching blocks includes a multiplicity of line terminators...
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4331835 |
Interface unit for a modular telecommunication system
A modular telecommunication system comprises switching blocks interconnected by bus-oriented interconnecting lines. Each switching block includes line terminators each adapted to be connected to a...
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4329541 |
Dialing system for teleprinter
A dialing system which utilizes a keypad on teleprinters retrofitted into existing teleprinter models through interfacing by voltage biasing and output circuitry with integrated circuit components...
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4327249 |
Direct current telegraphy systems
An electronic transmitter for direct current telegraphy systems. In order to limit cross-talk between neighboring telegraph lines it is known to filter telegraph signals prior to transmission to...
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4323728 |
Conversion circuit arrangement and method for switching digital encoded signals
There is disclosed a conversion circuit arrangement for switching digital data signals between data terminals operating with different data transmission procedures. The circuit arrangement adapted...
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4307265 |
Circuit arrangement for transmitting digital signals between transmitting and/or receiving devices operating with different data transmission procedures and different data formats
A circuit arrangement is provided for the transmission of digital signals between transmitting and/or receiving stations which operate with differing data transmission procedures and with different...
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4304960 |
Teleprinter private branch exchange
In a teleprinter private branch exchange having a communications unit, to which teleprinter terminals are connected, a central unit and a storage unit, the load due to connections between the...
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4296403 |
Method and circuit arrangement for switching and transmitting signals in, or from, a stored program controlled switching system
A method and a circuit arrangement for carrying out the method are provided for the switching and transmission of signals in, or from, respectively, a stored program controlled switching system...
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4292623 |
Port logic for a communication bus system
Apparatus and method for enabling asynchronous, collision-free communication between ports on a local shared bus network which is efficient in the use of bus bandwidth and which, in one embodiment,...
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4292466 |
Circuit arrangement for receiving unipolar DC signals
There is disclosed a circuit arrangement for receiving unipolar DC signals from a transmission line of a telecommunication system. An opto-coupler circuit is coupled with a light-emitting element...
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4292465 |
Distributed processing telex exchange
A distributed processing telex switch having different levels of processor control to handle the calls between terminations connected to the exchange is disclosed. A common control processor...
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4291196 |
Circuit for handling conversation data in a distributed processing telex exchange
A circuit for the systematic handling of conversation data from a calling party to a called party for use in a distributed processing telex exchange is disclosed. The customer terminations...
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4288658 |
Apparatus for generating telex signaling sequences in a distributed processing telex exchange
A system for generating telex signaling sequences in each termination line in a group of customer termination is disclosed. The system includes a multi-line high-speed line control processor which...
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4284976 |
Interface between communication channel segments
A plurality of transceivers frequently share a common communication medium or radio frequency channel. A broadcast channel can support only a limited number of transceivers. At some point, the...
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4258433 |
Digital data communication network having differing data transmission rate capabilities
The invention relates to method of interconnecting terminal devices in a digital telephone network wherein either the terminal devices in question normally operate at different data rates or they...
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4251684 |
Data storage systems
Queuing of interexchange messages in a multi-exchange digital telecommunication network is provided using a dynamic store into cells of which the messages are placed. A subsidiary control store has...
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