Automatic Patents (Class 178/3)
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Patent number: 11341105Abstract: An information processing apparatus includes one or more memories and one or more processors coupled to the one or more memories and the one or more processors configured to execute a first process by using first input information for a first terminal, perform first output of a first execution result generated by the first process executed by using the first input information, and in a case where a second terminal and the first terminal belong to a first group, perform second output of the first execution result in response to receiving a request of the first process to be executed by using second input information for the second terminal.Type: GrantFiled: March 20, 2019Date of Patent: May 24, 2022Assignee: FUJITSU LIMITEDInventors: Naoki Nishiguchi, Miwa Okabayashi, Kazuki Matsui
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Patent number: 10929314Abstract: According to various embodiments, an interface device may be provided. The interface device may include: an interface to a host computer; a wireless interface to a peripheral device; a difference determination circuit configured to determine a difference between timeslots in the host computer and time slots in the peripheral device; and a notification circuit configured to notify the peripheral device about the difference if the determined difference is larger than a pre-determined threshold.Type: GrantFiled: July 29, 2016Date of Patent: February 23, 2021Assignee: RAZER (ASIA-PACIFIC) PTE. LTD.Inventors: Kah Yong Lee, Chee Oei Chan
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Patent number: 10635037Abstract: Provided is an image forming apparatus that when a mobile terminal and image forming apparatus are used in combination, causes an operation to be performed by operating only one side. The image forming apparatus is used by being connected to a mobile terminal provided with a terminal side touch panel display. The communicating unit communicates with the mobile terminal and exchanges data. The apparatus side touch panel display is used for self operation of the image forming apparatus. The control unit, via the communicating unit, receives terminal side image data as content that is displayed on the terminal side touch panel display of the mobile terminal from the mobile terminal side, transmits apparatus side operation data corresponding to the content operated by a user on the apparatus side touch panel display to the mobile terminal side, and causes an application in the mobile terminal to be executed using the apparatus side operation data.Type: GrantFiled: March 15, 2019Date of Patent: April 28, 2020Assignee: KYOCERA Document Solutions Inc.Inventor: Atsushi Suzuki
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Patent number: 10467172Abstract: A mass data storage system includes a number of communicatively coupled storage drives powered and controlled by shared control electronics. The shared control electronics are configured to transmit analog read/write signals through an interconnect to each of the multiple individually selectable storage drives. The interconnect bi-directionally couples the control electronics to each of the multiple selectable storage drives.Type: GrantFiled: June 1, 2016Date of Patent: November 5, 2019Assignee: SEAGATE TECHNOLOGY LLCInventors: John Wayne Shaw, II, Philip Jurey, Robert John Dore, Jr., Anthony John Pronozuk
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Patent number: 10080069Abstract: Disclosed are apparatus and related methodologies for transmitting data related to utility conditions between monitoring locations and a central and/or data collection facility using a meter reading system. Collection of both corrected and uncorrected data from meters is achieved to thereby provide backup data in case of corrector failure. The presently disclosed subject matter also provides for the collection of telemetry data and alarms from correctors and recorders over a meter reading system. Two-way communications over a meter reading system is also provided to permit data transmission to selected endpoint devices.Type: GrantFiled: November 28, 2016Date of Patent: September 18, 2018Assignee: ITRON, INC.Inventors: Mark K. Cornwall, James P. Ogle
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Patent number: 9462591Abstract: A mobile communications network for communicating data to/from mobile communications devices, including a core network part including plural infrastructure equipment, and a radio network part including plural base stations communicating data to/from the mobile communications devices.Type: GrantFiled: October 28, 2011Date of Patent: October 4, 2016Assignee: SCA IPLA Holdings Inc.Inventor: Robert Zakrzewski
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Patent number: 9439175Abstract: A mobile communications device to communicate data to/from a mobile communications network, and to communicate an indication of a relative type of data packets for communication via a communications bearer for supporting a communications session of the mobile communications device, the indication used to configure the communications bearer, and to communicate the data packets via the communications bearer to the infrastructure equipment via the base stations in accordance with the indication, the communication of the data packets being controlled by the mobile communications network in accordance with the communicated indication. By providing the indication, such as an indication that the data packets are of low priority or are generated or being received by a machine type communication application, the mobile communications network can control the communication of the data packets from the communications bearer differently to data packets communicated via other communications bearer having a higher priority.Type: GrantFiled: October 27, 2011Date of Patent: September 6, 2016Assignee: SCA IPLA Holdings Inc.Inventor: Robert Zakrzewski
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Patent number: 9319103Abstract: Systems and methods are operable to communicate information to a direct current (DC) powered electronic device. An exemplary embodiment receives alternating current (AC) power with an AC information signal modulated thereon, converts the received AC power to DC power, demodulates the received AC information signal to determine information, modulates the information onto the transmitted DC power as a DC information signal, transmits the DC power with the DC information signal over a DC connector to the DC powered electronic device, detects the DC information signal on the modulated DC power at the DC powered electronic device, demodulates the DC information signal from the received DC power, and determines the information at the DC powered electronic device based upon the demodulated DC information.Type: GrantFiled: August 22, 2014Date of Patent: April 19, 2016Assignee: EchoStar UK Holdings LimitedInventors: David Robert Burton, Martyn Ward
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Patent number: 9288809Abstract: An infrastructure equipment forming part of a mobile communications network to communicate data to/from mobile communications devices. The infrastructure equipment receives an indication of a relative type of data packets for communication via a communications bearer supporting a communications session of a mobile communications device, the indication to configure the communications bearer, to provide the communications bearer from the mobile communications device based on the indication, and to control communication of the data packets via the communications bearer based on the indication. By providing the indication, such as an indication the data packets are of low priority or are generated or received by a machine type communication application, the mobile communications network can control communication of the data packets from the communications bearer differently to data packets communicated via other communications bearer having a higher priority.Type: GrantFiled: October 28, 2011Date of Patent: March 15, 2016Assignee: SCA IPLA Holdings Inc.Inventor: Robert Zakrzewski
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Publication number: 20040085574Abstract: A removable and re-attachable keyboard device for interfacing with an imaging device in a position adjacent to a display on the imaging device is presented. The keyboard device docks or otherwise couples the imaging device as opposed to residing on the table or base upon which the imaging device resides. The keyboard device includes a keyboard base which is generally planar with one end thereof being a keyboard base interface for facilitating at least mechanical coupling of the keyboard device with the imaging device and a keyboard. The keyboard base supports and maintains the keyboard in an ergonomic and more user-friendly attitude in relationship to a display of the imaging device. Messaging services are also available for dispatching directly from the imaging device as a result of data input to the keyboard device.Type: ApplicationFiled: November 4, 2002Publication date: May 6, 2004Inventors: Kevin Falk, Russell A. Mendenhall, Joseph J. Cooper
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Patent number: 5257160Abstract: 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 transmission device which carries out signal transmission between a plurality of control devices uses two transmission wires with fixed polarity, the serial transmission interface of each control device is equipped with two pairs of differential drivers and receivers, and the driver outputs and receiver inputs of different polarity in these two pairs of drivers and receivers are connected to each other. This device and control method make connection terminals for signal lines on each control device nonpolar, considerably reducing workload required for installing the apparatuses and wiring and eliminating connection errors.Type: GrantFiled: April 11, 1991Date of Patent: October 26, 1993Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Koji Yokohama, Fumio Aoi, Kanji Isomichi, Atsushi Hirose, Hitoshi Yasuda, Chuzo Ninagawa
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Patent number: 5117070Abstract: 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 passages in a system where a plurality of terminals provided with a transmitting, receiving control processing portion for transmitting receiving the control signals are coupled by transmitting passages so as to effect the mutual communication, realizing the writing onto the memories by a system similar to the reading of the memories when the above described system is a system by the D2B, being capable of easily coping with respect to the expansion of the reading.writing control operation of the memories, simplifying the realization of the reading.writing control sequence which is adapted to reduce the amount of the telegraphic messages to be exchanged in the reading.writing operation of the memories on the other terminal.Type: GrantFiled: October 9, 1990Date of Patent: May 26, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Reiko Ueno, Naofumi Nakatani, Masao Ikezaki, Terumasa Yamamoto, Hiromasa Nakatsu
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Patent number: 4835346Abstract: 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 includes a serial interface simulator which replaces the serial interface of the transmitter, a memory which stores data received by the serial interface simulator, and an interface which transmits to the receiver the data stored in the memory. The serial interface simulator includes a data transmission register, a data reception register, a first buffer register, a second buffer register, a bus, a simulation control register and a simulation state register.The standard software places data in the data transmission register and receives data from the data reception register. Data placed in the data transmission register is not immediately serially transmitted to the receiver, but is transferred to the first buffer register from where it is transferred to the memory.Type: GrantFiled: September 8, 1987Date of Patent: May 30, 1989Assignee: Hewlett-Packard CompanyInventors: Joel Setton, Jean-Marc Laugenie
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Patent number: 4801934Abstract: 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 levels is transmitted in data blocks each having a status field and a data field, the status field identifying the status of stations at a lower level in the network. The information in the status field is reduced by deleting data corresponding to a predetermined status information content corresponding to the most probable configuration of such data. The remaining status data is divided into sub-sets and transmitted with an individual sub-address for each sub-set, and a control signal identifying the number of sub-sets which are transmitted, and an address identifying the sending station.Type: GrantFiled: October 4, 1985Date of Patent: January 31, 1989Assignee: Siemens AktiengesellschaftInventor: Hans Herkert
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Patent number: 4786763Abstract: 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 terminal operating with a first transmission procedure and a subscriber terminal operating with a second transmission procedure, attainable only through manually switched connections. A manual switchboard having at least one job memory unit and a control unit is provided. Jobs for connections to be manually switched, respectively containing at least a job number, as well as selection data, serving for the establishment of connections and data signals to be transmitted, are written into the job memory unit. These jobs are output in the sequence in which they were input, such that the control unit maintains, for each job, only the selection data required for the setting-up of a connection and the associated data signals for a conversion and related forwarding.Type: GrantFiled: March 30, 1988Date of Patent: November 22, 1988Assignee: Siemens AktiengesellschaftInventor: Hinrich Schumacher
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Patent number: 4760395Abstract: 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 specific network architecture (ICNA) independent of the aforementioned architectures. To the selector system (V) of the network are connected pieces of conversion equipment (CEI, CDI, CSI, CIE, CIS, CID). Pieces of equipment for different network architectures are capable of being linked via the aforementioned pieces of conversion equipment. Connections between equipment belonging to the specific network architecture (ICNA) and a second network architecture are routed via a piece of conversion equipment and connections between equipment belonging to two other network architectures are routed via two pieces of conversion equipment wired in series.Type: GrantFiled: June 20, 1986Date of Patent: July 26, 1988Inventors: Kurt Katzeff, Bengt Akesson
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Patent number: 4700021Abstract: 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 loop, with each control device including a signal compiler which compiles data signals to be transmitted in the form of a data signal block which includes at least one receiver address identifying another control device which is intended to receive the transmitted signal block. The signal compiler is followed by a transmit buffer which includes an intermediate storage. A prepared data signal block is accepted in the intermediate storage. A buffer control is connected to the intermediate storage. A transmit authorization signal is transmitted via the loop from control device to control device. Upon receipt of the transmit authoriztion signal by the relevant control device, the buffer control therein enables a word-by-word read-out of the data signal block stored in the intermediate storage.Type: GrantFiled: August 27, 1986Date of Patent: October 13, 1987Assignee: Siemens AktiengesellschaftInventors: Karl-Heinz Michels-Krohn, Josef Untergruber, deceased
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Patent number: 4700020Abstract: A data transmission system has a number of control devices connected via a transmission loop. Each control device includes signal processing circuitry which compiles data signals to be transmitted in the form of a data signal block. The signal processing circuitry is followed by a transmit buffer, which includes a write/read memory. A prepared data signal block can be accepted into this memory. A counter is connected to the memory which continuously addresses the memory for accepting a data signal block, and for emission thereof to the loop upon the appearance of a transmit authorization signal. The write/read memory is followed by a register. In addition to memory locations for accepting a data signal word, this register additionally includes memory locations for auxiliary information to be attached to the individual data signal words. The auxiliary information is derived from counter readings of the counter.Type: GrantFiled: August 27, 1986Date of Patent: October 13, 1987Assignee: Siemens AktiengesellschaftInventors: Karl-Heinz Michels-Krohn, Josef Untergruber, deceased
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Patent number: 4667320Abstract: 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 regenerators (RS1 to RS16) connected to a first end of intermediate links (LI1 to LI28) interconnecting two stages and groups of regenerators (R3.1 to R3.16) connected to the other ends of the intermediate links. A monitoring device comprises sampling devices (P) connected to the groups of regenerators and to a comparator circuit (CC). A main marker (MQP) receives connection instructions and sampling instructions and transmits these instructions to auxillary markers (MQ) which control the sampling circuits (P) and the switching circuits (C1, C2) of the switching network.Type: GrantFiled: March 26, 1985Date of Patent: May 19, 1987Assignee: Compagnie Industrielle des Telecommunications Cit-AlcatelInventors: Guy Onno, Jean-Yves Jaouen
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Patent number: 4602252Abstract: A method for data communication usable for a system having a common transmission line, a plurality of transceivers connected to the common transmission line, and a data processing equipment connected to each of the transceivers, the system being arranged such that data from the data processing equipment is sent to the common transmission line through the corresponding transceiver, while data from the common transmission line is sent to the data processing equipment through the corresponding transceiver, thereby effecting a data communication between data processing equipment, wherein when a request to send data is sent from the data processing equipment to the corresponding transceiver, a carrier signal is sent to the common transmission line, and when the fact that no data is sent from any of the other transceivers to the common transmission line is detected during a given period of time after the sending of the carrier signal, the transceiver gives a permission to send data, to the corresponding data procesType: GrantFiled: December 28, 1982Date of Patent: July 22, 1986Assignees: Hitachi, Ltd., Yagi Antenna Co., Ltd.Inventors: Yukio Nakata, Kaoru Suda
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Patent number: 4570565Abstract: 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 and data switching system makes available a number of current date and time information items assigned to the respective individual time zones that correspond to the number of time zones to be taken into consideration. From these date and time information items there is selected, in the course of the establishing of connections, the date and time information corresponding to the subscriber stations involved in these connections, which is then made available for transmission to these subscriber stations information.Type: GrantFiled: September 21, 1984Date of Patent: February 18, 1986Assignee: Siemens AktiengesellschaftInventors: Peter Murawski, Wolfgang Mayer
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Patent number: 4528658Abstract: 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 departing digital messages by a transmitting section and handling arriving digital messages reaching a receiving section. Each modular unit is connected to all other units by an outgoing and an incoming two-wire line each including a signaling wire and a response wire. The signaling wire of the outgoing line of a given modular unit emits, in the presence of a departing message in a memory of the associated transmitting section, a data-ready signal to the receiving section of the modular unit for which that message is destined; the latter section, continuously scanning the signaling wires of all incoming lines, then halts its scan and sends back an acknowledgement signal on the response wire of the same line whereupon the message is sent out on the aforementioned signaling wire.Type: GrantFiled: September 13, 1982Date of Patent: July 9, 1985Assignee: Italtel-Societa Italiana Telecomunicazioni S.p.A.Inventor: John W. Israel
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Patent number: 4501930Abstract: 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 predetermined control signal, for example a "carriage return" signal, are all of the characters of the pending row printed. The teleprinter has a display unit for displaying at least a portion of those characters of a row which have not yet been printed. The display unit may also display at least one preceding and at least one following row in addition to the row being printed.Type: GrantFiled: March 18, 1983Date of Patent: February 26, 1985Assignee: Siemens AktiengesellschaftInventor: Roman Lutz
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Patent number: 4497976Abstract: 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 connected to teleprinter subscriber stations and teletex subscriber stations which are capable of transmitting and receiving message signals in accordance with different transmission procedures. The transmission of message signals between the subscriber stations occurs over at least one signal converter connected to the data switching center. After an occupation of the signal converter proceeding from a teleprinter subscriber station, the corresponding digital information are deposited in a memory of the signal converter by the data switching center upon each attempt to establish a connection from the signal converter to a teletex subscriber station.Type: GrantFiled: February 15, 1983Date of Patent: February 5, 1985Assignee: Siemens AktiengesellschaftInventors: Norbert Torggler, Dietmar Franz
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Patent number: 4479195Abstract: 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 communicating directly with data terminals and higher level processors controlling conference configuration. Data to be conferenced is put in a buffer memory which is shared by all levels of processors. The ports can be configured to be compatible with different type terminals that operate at different data speeds.Type: GrantFiled: September 7, 1982Date of Patent: October 23, 1984Assignee: AT&T Bell LaboratoriesInventors: Diane E. Herr, Reinhard Metz, Larry A. Russell
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Patent number: 4477695Abstract: A microprocessor operated telecommunications interface for connection to a telecommunications line to provide transmission of data between a dedicated terminal of an automatic teletypewriter switching service of the type operating in one code and a data base of the type operating in another code is disclosed. The interface includes a microprocessing unit, a memory for operating the microprocessing unit, a random access memory, a telecommunications modem, means for formating and controlling serial a synchronous data communication and at least two user-actuatable switches for selecting a function of the interface. One function selecting switch accesses the microprocessor unit to the user terminal to provide for entry and editing of message information while a second function selecting means actuates the telecommunications to dial the data base using dialing information stored in the random access memory.Type: GrantFiled: September 30, 1982Date of Patent: October 16, 1984Assignee: Electronic Mail Corporation of AmericaInventor: Robert J. Buck
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Patent number: 4476347Abstract: 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 different transmission procedures. The transmission is executed with the assistance of a decentralized converter in which a fixed assignment between the transmission lines of the first switching network and the virtual channels to be employed on transmission lines of the second switching center for a signal transmission is defined. Of the signals to be transmitted, only the signal portions effecting the execution of network-dependent procedure divisions are converted in the converter. The data signals appearing in accordance with the network-independent procedure divisions are combined in unaltered form with the converted signal portions.Type: GrantFiled: March 8, 1983Date of Patent: October 9, 1984Assignee: Siemens AktiengesellschaftInventors: Rolf Hagen, Peter Weidner
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Patent number: 4466000Abstract: 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 medium undergo an arbitration to determine which one will gain access to it at any time. The system according to the invention provides the arbitration without negatively affecting the capacity of the communication medium. In the system, arbitration takes place during the data communication to decide who will be the next user, arbitration and communication being effected in frequency bands which differ from each other.Type: GrantFiled: February 26, 1982Date of Patent: August 14, 1984Assignee: U.S. Philips CorporationInventors: Gerardus L. M. Jansen, Gerardus J. J. Vos
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Patent number: 4463351Abstract: 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 communication, is connected through a modem to a bus with parallel branches extending to all the terminals, each branch including an outgoing-data lead, an incoming-data lead and two ancillary leads carrying clock pulses for the timing of data transmission and reception which are generated at the exchange. Each terminal, identified by a multibit address, is provided with an interface including a carrier sensor which detects the free or busy state of the line--during a time slot assigned to data transmission--on the basis of a certain protocol according to which an idle state is denoted by an unbroken succession of at least seven bits of predetermined logical value (here "1").Type: GrantFiled: March 11, 1982Date of Patent: July 31, 1984Assignee: Cselt Centro Studi E Laboratori Telecomunicazioni S.p.A.Inventor: Volmer Chiarottino
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Patent number: 4454383Abstract: 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 differential voltage, which is intermediate to the binary data differential voltage levels, is placed on the pair. The start of a data transmission is signaled by a transition of the differential voltage from the quiescent state voltage to the binary voltage of the first data bit of the data transmission. Since all data transmissions are of known bit lengths, the end of a data transmission is determined by counting data bits.Type: GrantFiled: November 22, 1982Date of Patent: June 12, 1984Assignee: Bell Telephone Laboratories, IncorporatedInventor: Thomas H. Judd
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Patent number: 4451697Abstract: 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 information concerning the free state or busy state of the signal converters. For this purpose, it is provided that, having forwarded the signals with which it has been previously supplied for signal conversion, the signal converter emits a special free signal which may differ from an accompanying signal indicating the end of signal transmission and which changes the busy state signal ("1") indicative of the busy state of the signal converter directly into a free state signal ("0").Type: GrantFiled: July 21, 1981Date of Patent: May 29, 1984Assignee: Siemens AktiengesellschaftInventors: Dietmar Franz, Norbert Torggler
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Patent number: 4431864Abstract: 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 operate at different logic voltage levels and character formats. The input-output converter includes a universal asynchronous receiver transmitter that converts m bit serial data into n bit parallel data in a receive mode and n bit parallel data to m bit serial data in a transmit mode while stripping and adding asynchronous start-stop bits. The input-output converter also includes logic voltage level converters that convert digital data to appropriate logic voltage levels for each function.Type: GrantFiled: October 14, 1981Date of Patent: February 14, 1984Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Norman J. Sturdevant, Jr.
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Patent number: 4430525Abstract: 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 subscriber stations, and vice-versa. In order that the load on the signal converters may be as low as possible in the event that digital signals cannot be deposited in the desired subscriber station, the data exchange system is additionally connected to at least two special teletex transmitting/receiving devices. These teletex transmitting/receiving devices can be operated by a special call signal only in the event that a teletex subscriber station or a signal converter is currently unable to deposit digital signals in the desired subscriber station. In response to such operation of the teletex transmitting/receiving devices, the latter is supplied with digital signals which cannot currently be deposited, together with additional information which enable the establishment of a connection to the desired subscriber station.Type: GrantFiled: January 8, 1982Date of Patent: February 7, 1984Assignee: Siemens AktiengesellschaftInventors: Dietmar Franz, Norbert Torggler
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Patent number: 4410889Abstract: 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 up of a variable number of fixed-length packets. This system is adapted for automatic address assignment of different stations of the network so that the network may be expanded or contracted by adding stations and removing stations respectively. In this manner, a very reliable network is provided in that the failure of any particular station does not interfere with the functioning of the other stations in the network or the network itself. In addition, the system includes provision for associating various server stations with a given procedure so that a client station may be broadcast a request for a procedure and corresponding server stations will send the response to the client station containing the network identification of the server stations.Type: GrantFiled: August 27, 1981Date of Patent: October 18, 1983Assignee: Burroughs CorporationInventors: David M. Bryant, Ryn C. Corbeil, Michael A. Malcolm, Donald R. Thompson
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Patent number: 4409592Abstract: 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 transmitting a signal having transitions, there is provided a means (20) responsive to the presence and absence of a signal on said communications channel (3) during a transition of a signal transmitted by said transmitting means (80) for providing a collision detected (CD) signal if there is destructive interference with the transmitted signal on said communication channel (3) during a transition of said transmitted signal and means (48) responsive to said CD signal for terminating said transmitting of said signal.Type: GrantFiled: April 20, 1981Date of Patent: October 11, 1983Inventor: V. Bruce Hunt
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Patent number: 4409593Abstract: 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 while the companion transmitter is transmitting digital data, the CFSK signal is received during each of a successive plurality of synchronous bit time intervals with a first amplitude. The received signal is: squared and filtered in a first channel; multiplied with a locally generated signal of a second amplitude and associated with a first binary chirp condition, and then filtered, in a second channel; and multiplied with another locally generated signal of the second amplitude and associated with the remaining binary chirp condition, and then filtered, in a third channel. The channel outputs are functions of the signal amplitudes and also of the number of system transmitters simultaneously transmitting one or the other of the binary data states.Type: GrantFiled: January 11, 1982Date of Patent: October 11, 1983Assignee: General Electric CompanyInventor: Sanjay K. Bose
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Patent number: 4388489Abstract: 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 network (30). Each keystation (70, 602, 98) is associated with a keystation terminal controller interface (68, 96, 600) which is in turn connected to a message switching node (32) for routing calls throughout the network (30). The keystation controller interface (68, 96, 600) locally stores (304, 306) video conversational textual data for its associated keystations (70, 82, 84, 98, 100, 602) and enables two different designated keystations to conduct two different video conversations with a common keystation in a split screen display (76). The split screen display (76) may also be used to display retrievable data from a data base (50, 52) for simultaneous display (76) along with a video conversation.Type: GrantFiled: January 30, 1981Date of Patent: June 14, 1983Assignee: Reuters LimitedInventors: Jack G. Wigan, David G. Ure, John M. Richards
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Patent number: 4379946Abstract: 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 indicating that the control signal is any one of a selection signal, a call accepting state indication signal and a data receiving state indication signal, the function determination field being followed by a terminal appointing field in which the signal, set in the function determination field is provided bit by bit in a predetermined order for each destination terminal. Circuit arrangements for transmitting and receiving such a control signal are provided as signal control equipments both on the side of an originating terminal and on the side of an exchange.Type: GrantFiled: May 20, 1981Date of Patent: April 12, 1983Assignee: Nippon Telegraph & Telephone Public CorporationInventors: Toshiro Mizuno, Kazuo Imai
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Patent number: 4379294Abstract: 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 ordinarily operate in a normal mode, seeking access to the serial bus upon occurrence of a democratic time window. In the normal mode, each station is given an opportunity to issue a single transmission before any one station is permitted to issue a second transmission. Should any station require transmission of an urgent message, that station may seek access during an autocratic time window. Within any single round of bus arbitration, all autocratic time windows occur prior to the first democratic time window.Type: GrantFiled: February 12, 1981Date of Patent: April 5, 1983Assignee: Electric Power Research Institute, Inc.Inventors: James F. Sutherland, Donald F. Furgerson, Mladen Kezunovic
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Patent number: 4355403Abstract: 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 positive and negative line current keying, uses a single current monitor to control positive and negative current regulators responsive to the positive and negative keying respectively. The switching regulators operate within a relatively narrow band centered around the nominal signaling current, with filtering being provided for ripple control. The circuit may also include a keying detector and open loop detector for system monitoring.Type: GrantFiled: June 1, 1979Date of Patent: October 19, 1982Assignee: Frederick Electronics CorporationInventors: John W. Spaniol, Ronald E. Tollum, Julius A. Barthelme
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Patent number: 4354261Abstract: 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 transmission procedures is adapted for use with an electronic data switching system and comprises at least two interface circuits having input/output converting networks. External input terminals of these interface circuits are adapted for connection with respective input/output units of the electronic data switching system for each type of data terminal. Internal input/output terminals are connected to a storage unit for storing a multi-address message, including data information to be transmitted and identification information of the called data terminals.Type: GrantFiled: March 10, 1980Date of Patent: October 12, 1982Assignee: Siemens AktiengesellschaftInventors: Rolf Hagen, Diethard Linck, Joerg Pappenberger
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Patent number: 4354054Abstract: 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) arranged for receiving (36) a train of messages (91, 96), each message originating from a different preceding station (such as 13 and 12) in the tandem configuration, followed by a received caboose signal (97). Each reporting circuit responds in turn to the train of messages and the received caboose signal by retransmitting (60) the train of messages (91, 96) but deletes the received caboose signal (97). The reporting circuit, in response to detection of the received caboose signal, appends to the retransmitted train of messages a message (100) from the local station and a new caboose signal (102).Type: GrantFiled: April 16, 1981Date of Patent: October 12, 1982Assignee: Bell Telephone Laboratories, IncorporatedInventor: Jules A. Bellisio
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Patent number: 4346259Abstract: 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, which comprises a binary data stream in an asynchronous code, is sampled at a rate of at least three times greater than the output bit rate of the terminal. A clock signal to effect the sampling is generated within the PABX. The sampled data appears to the PABX as a bit stream synchronized with the PABX clock, allowing direct application of the sampled data to the PABX. The receiving terminal, upon reception of a start bit, waits one-half time (of its own clock) and samples the received data to reconstruct the received bits into corresponding alphanumeric characters. The frequency of the clocks internal to each terminal may vary within one percent of each other before requiring each terminal to be synchronized with each other.Type: GrantFiled: June 23, 1980Date of Patent: August 24, 1982Assignee: Anderson Jacobsen, Inc.Inventor: Jay Doty
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Patent number: 4340775Abstract: 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 each adapted to be connected to a data terminal. In each switching block there are provided (1) a central processing system for establishing communication links associated with a respective call, (2) a communications controller for controlling local data exchange between pairs of line terminators connected thereto across real channels, (3) a virtual channel controller for controlling remote data exchange across virtual channels to different switching blocks and (4) interface units arranged between the virtual channel controller and a respective one of the interconnecting lines.Type: GrantFiled: October 29, 1980Date of Patent: July 20, 1982Assignee: Siemens CorporationInventors: William Gesek, James M. Major
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Patent number: 4340776Abstract: 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 includes a multiplicity of line terminators each adapted to be connected to a respective data terminal. A communications controller is provided in each switching block for controlling local data exchange between pairs of line terminators connected thereto across real channels. A virtual channel controller is connected to the communications controller and controls remote data exchange across interconnecting lines via virtual channels between a locally associated data terminal and a data terminal associated with a different switching block. A central processing system is connected to the virtual channel controller and controls setting up switching operations within both the virtual channel controller and the communications controller.Type: GrantFiled: October 29, 1980Date of Patent: July 20, 1982Assignee: Siemens CorporationInventors: Manfred Ganz, Enrique Gueldner
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Patent number: 4331835Abstract: 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 respective data terminal and control means for controlling local data exchange between line terminators directly connected thereto and remote data exchange from local line terminators to a data terminal associated with a different switching block. The interconnecting lines include a plurality of individually controlled interlink buses, which are coupled to each switching block by a separate interlink-bus interface unit and a short distance transmission line. Data transfer across an interlink bus is performed under control of an interlink-bus controller associated with each bus, by scanning the interlink-bus interface units. Data characters are transmitted in time-multiplex mode together with address information of the receiving switching block for selecting the receiving interlink-bus interface unit.Type: GrantFiled: October 29, 1980Date of Patent: May 25, 1982Assignee: Siemens CorporationInventors: Enrique Gueldner, James M. Major
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Patent number: 4331834Abstract: 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 includes a multiplicity of line terminators each adapted to be connected to a respective data terminal. A communications controller is provided in each switching block for controlling local data exchange between pairs of line terminators connected thereto across real channels. A virtual channel controller is connected to the communications controller and controls remote data exchange across virtual channels to different switching blocks. Interface units are arranged between the virtual channel controller and a respective one of the inter-connecting lines for providing remote data exchange between data terminals each associated with a different switching block.Type: GrantFiled: October 29, 1980Date of Patent: May 25, 1982Assignee: Siemens CorporationInventors: Manfred Ganz, Enrique Gueldner, Dieter Burgermeister
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Patent number: 4329541Abstract: 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 having inputs to the teleprinter keypad and a pulse driver coupled to the existing dialing circuit through relays. The relays, driver and integrated circuit components are energized under different voltage levels lower than the teleprinter operating voltage through the voltage biasing circuits connected to the teleprinter power supply.Type: GrantFiled: May 14, 1980Date of Patent: May 11, 1982Inventor: Robert F. Gerber, Jr.
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Patent number: 4327249Abstract: 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 "round-off" their edges. In the present electronic transmitter telegraph signals are given approximately "sinusoidal edges" by the use of a function generator. In FIG. 1 an electronic transmitter comprises an input circuit 1, a switching circuit 2 and an output circuit 3. Binary information signals at an input produce telegraph signals on a telegraph line 6-6'. The output circuit 3 comprises two function generators 15 and 17 and a current source 21. Switches 11 and 14 in the switching circuit 2 control which function generator is operative in response to command signals D.sub.1 and D.sub.2 from the input circuit. The result is that current pulses from the current source 21 have exponentially varying leading and trailing edges which approximate the sinusoidal edges as shown in FIG. 2.Type: GrantFiled: May 16, 1980Date of Patent: April 27, 1982Assignee: U.S. Philips CorporationInventor: Gerrit Rademaker
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Patent number: RE31182Abstract: 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 telecommunications terminals, facsimile transceivers or other data input sources over a communications network with a plurality of other terminals, facsimile transceivers or other data sources having access to the communications network and with which such communication is desired. The disclosed packetizing of data and transmission thereof in a store-and-forward mode with dynamic routing provides a highly efficient utilization of the transmission facilities, substantially error-free data transmission and a handshake capability between a wide variety of dissimilar and otherwise incompatible terminal devices such as facsimile transceivers having differing protocols, modulation techniques and other speed and code characteristics.Type: GrantFiled: October 11, 1979Date of Patent: March 15, 1983Assignee: International Telephone and Telegraph CorporationInventors: William C. Crager, Sudhindra R. Umarji, Robert H. Griffin, Gerard J. Louit