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Match Document Document Title
5418334 Relative position tracer lamp indicator  
Digital signal cross connect communication systems include a plurality of tracer circuits within a particular shelf, a plurality of shelves within a particular rack, a plurality of racks within a...
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...
RE33337 Stenographic translation system  
A steno transtator system for translating stenographic keystrokes to language format according to a predefined keystroking methodology includes a steno writer to generate a sequence of stroke...
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...
4914688 Modem system  
A modem system includes an RS232C interface; a modulator/demodulator; an input-output device having a parallel interface connected with a data terminal unit having no communication function or...
4896315 Apparatus and method for determining network component locations on a local area network system cable segment  
Apparatus and method are disclosed for determining the location of a network component coupled to a local area network segment. A remote segment monitor unit is coupled to either end of a cable...
4890278 Apparatus and method for calibrated monitoring of output voltage levels of local area network communication devices  
Apparatus and method are disclosed for providing a calibrated measurement of signals applied to a local area network cable segment. A remote segment monitor unit has the signal sampling circuit...
4836317 Method for distributing current address tables in "n" ring-shaped networks  
A method provides for the current address tables present in a respective subscriber equipment monitoring a ring-shaped network to be distributed to all subscriber equipment of the n ring-shaped...
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...
4807276 Re-transmission method and apparatus in communication system using public communication lines  
In a communication system having an automatic transmission/reception function to perform data communications through telephone lines associated with teletex systems, facsimile systems and the like,...
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...
4777331 Method and arrangement for transmitting binary-coded information in a measuring system  
In a measuring system, a measuring signal is transmitted on a two-wire line by varying the DC supply current which is transmitted on the same two-wire line. In addition, binary-coded information...
4714802 Apparatus and method for determining the source direction of local area network transmissions  
A direction sensitive coupling unit, and method of operation, is disclosed for use in a communication medium to indicate the presence and source direction of transmissions. A directional coupler is...
4713495 Device for sending and receiving a message  
The invention concerns device for transmitting and receiving a message by means of the tactile sensation. By means of keys (2), a code corresponding to one character is formed at a time, which code...
4711976 Data transmission facility  
A data transmission facility comprises a central station and a plurality of substations connected thereto via a data bus, the substations outputting a control signal dependent on the transmission...
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...
4670626 Cross connect frame for digital signals  
A cross-connect frame for digital signals transmitted at DS-1 and higher rates independent of signal format is disclosed. In its simplest form the frame includes a single chassis into which boards...
4663499 Method for transmitting messages between a central station and several distant stations  
A method for transmitting a message by a two way wire connection between a central control and survey station (1) and several remote detection stations (3A-3N) adapted to generate a signal...
4617423 Data communication system  
A network multiple physical layer interface connected to a first communications network physical layer and through a MODEM to a second physical layer wherein the interface includes circuitry for...
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...
4538026 Loop back system for loop transmission line  
A loop back system for a loop transmission line allows the whole system to be looped back for addition or removal of a transmission device, without cutting off loops and in exactly the same manner...
4511759 Apparatus for controlling transfers of files between computers  
Apparatus for controlling the transfer of data between computers, connected to a communications network, accessible to at least one terminal by means of an asynchronous concentrator, which is...
4432090 Automatic error correction system for teleprinter traffic with bunched repetition  
The disclosure concerns a communication system for line printers, such as teleprinter equipment, via high-quality radio communications. The repetition of the signals received mutilated takes place...
4375103 Method and apparatus of signalling request to send clear to send delay  
Disclosed are a method and apparatus for exchanging information between a data terminal equipment (DTE) and data circuit terminating equipment (DCE) or controller connected to the data terminal...
4337465 Line driver circuit for a local area contention network  
This disclosure relates to a line driver circuit for a station in a data transmission network, which driver circuit is adapted to drive the channel medium with a constant current so that conflicts...
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...
4323729 Circuit arrangement for the control of a crypto operation in the case of procedure-controlled semi-duplex data transmission systems  
A crypto control circuit arrangement is disclosed for controlling crypto operation in the case of procedure-controlled semi-duplex data transmission systems in which data are transmitted from a...
4319222 Transmitter apparatus for an information transmission system  
In order to form a first-come first-served queue in an information transmission system employing a common transmission channel when several transmitters of the system try to gain access to the...
4287387 Teletypewriter loop switching matrix  
A system for interconnecting and switching teletypewriter or digital data gnals when transmitted over any of the four universally accepted standard signal loops. The system incorporates a novel...
4161623 Code generator for text transmission devices  
A code generator for text transmission devices emits code characters assigned to subscribers over a trunk line in order to allow a subscriber to be recognized. The code characters are stored in a...
4160874 Process for signaling an interruption in the state of readiness for the reception in data terminal devices in which data are exchanged  
In a process for signaling an interruption in the state of readiness of a data terminal device in a called station, the data being transmitted over a data selector network, and in particular for...
4107457 Transfer terminal with library phrase memory  
A data transfer terminal of the type including a keyboard means, a display means and a printer for use in a data center controlled data transfer system. The printer of the data transfer terminal is...
4095045 Method and apparatus for signaling in a communication system  
A method and apparatus are disclosed for using a specified pattern of signal events for signaling in a digital communication system. Illustratively, detection of a first event in a control signal...
4093819 Closed user group facility  
A closed user group facility in a data transmission system which has a closed user group of terminals accomodated in a switching network, and in which the switching network registers a terminating...
4063045 Telecommunication line switching circuit  
An isolated line switching circuit for direct connection of a telephone, teleprinter, or like telecommunication instrument to a transmission line, comprising a solid-state optical cell including a...
4055729 Apparatus for the direct connection of ancillary equipment to a telephone network  
Ancillary equipment including a facsimile transceiver is directly connected to a telephone network through a coupling arrangement. The coupling arrangement includes a transfer relay for...
4000363 Arrangement for the production of selection pulses in teleprinters  
A teleprinting apparatus which eliminates a dial switch for connection to a remote subscriber and which substitutes a circuit arrangement which utilizes the keyboard through a coding system to...
3982061 Data transfer control apparatus  
In a multi-device data transmission system with source and acceptor devices linked by a data highway and handshake lines, provision is made for automatically adjusting the delay of the handshake...
3968330 Code generator for teleprinters or data printers  
A code generator for teleprinters or data printers which, for the recognition of the subscriber, emits a sequence of character signals assigned to the subscriber. A memory is provided which is...
3968324 Circuit arrangement for synchronizing the letters/figures levels of several input and output devices in teleprinters  
An arrangement for synchronizing one or more input/output devices in teleprinters in the context of a subdivision, necessitated by the use of a five-bit code (CCITT 2) for communications...
3964048 Communicating over power network within a building or other user location  
Power lines within a building or other user location are connected through a fuse and a filter to an external power grid that supplies power at the usual 50 Hz or 60 Hz. Communications apparatus...
3920896 Communications systems having a selective facsimile output  
A switched communications system including store and forward facilities is provided in accordance with the teachings of the present invention wherein, in an exemplary embodiment, any of a plurality...
3919461 Data transmission system  
In order to couple a plurality of data transmitting terminals to a data receiving device via a single transmission channel, the high side of the transmission line pair is biased through a resistor...
3916090 Intracommunication system for a communications terminal  
A telecommunications terminal which is divided into at least two portions; specifically, a keyboard portion and a central portion with a display and a memory, in which the depression of a key on...
3911205 Circuit arrangement for connecting telegraph and data subscribers to a switching system  
A circuit arrangement for connecting telegraph and data subscribers to the four-wire interface of a switching system over two-wire single-current lines, comprising an electronically adjustable...
3909510 Direct connection digital transmission apparatus  
Apparatus is disclosed for interconnecting digital data stations through a transmission medium such as a directly connected unloaded pair of wires. The apparatus transmits data as polarity, or more...
3894175 Line control unit for teleprinters  
A control unit for connecting a teleprinter to a transmission line wherein the electrical insulation between the teleprinter and the line is achieved by opto-electronic circuits. These circuits...
3816645 COMMUNICATIONS SYSTEM  
A processor substation for a communication system includes interrupt circuitry for transmitting coded communications as logic levels, rather than fixed length bits, so that communications can be...
3803346 CIRCUIT ARRANGEMENT FOR THE TRANSFORMATION OF DIRECT CURRENT TELEGRAPHY SIGNALS  
A circuit arrangement for converting single current, direct current telegraphy signals into double current signals is described. The double current signals operate a double current telegraphy...
3798598 DATA COUPLING APPARATUS FOR DEDICATED COMMUNICATION LINES  
Data coupling apparatus for establishing a data communication path between a local data device and a remote data device over an existing communication channel. The capability of each of the local...
Matches 1 - 50 out of 207 1 2 3 4 5 >