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| Number | Title | Issue Date |
| 4468813 | Digital voice storage system A digital voice storage system adapted for use in a multiple unit land mobile radio communications system. The system utilizes a PSK signalling system with fixed length data packets to control a system capable of multiple message storage of speech at mobi... | 08/28/1984 |
| 4453247 | Speech packet switching method and device In a speech packet switching system, an input speech signal to a speech packet transmitting station is converted to a digital signal to form speech data blocks, which are discriminated to talkspurt blocks and silence blocks, and only the talkspurt speech ... | 06/05/1984 |
| 4450556 | Digital signal subscriber loop and interface circuit A TDM PCM telephone system and a telephone user terminal are interconnected by a digital subscriber loop circuit which provides at least a single channel communication path for digital signals of data or encoded voice origin. The digital subscriber loop c... | 05/22/1984 |
| 4390981 | Microprocessor controlled message handling system A message handling system includes a computer controlled message processor for use in network configurations to store and forward low-speed messages between long distance and international communicators. Its use is based on dial-up connections between net... | 06/28/1983 |
| 4387441 | Data processing system wherein at least one subsystem has a local memory and a mailbox memory within the local memory for storing header information A data processing system employing broadcast packet switching and having a plurality of subsystems and a system bus for linking the subsystems. The subsystems are grouped within stations that are each enclosed by a computer cabinet. The system bus include... | 06/07/1983 |
| 4345325 | Message-interchange circuitry for microprocessors linked by synchronous communication network A microprocessor associated with a PCM telecommunication network dialogues with remote data-handling components such as other microprocessors through message-interchange circuitry which includes a read/write memory having storage areas individually alloca... | 08/17/1982 |
| 4330847 | Store and forward type of text processing unit A store and forward unit having an output print station with convenience copying capabilities has connections to diverse text signal sources and destinations. Such diverse sources and destinations may have established textual format and control characters... | 05/18/1982 |
| 4309765 | Process for transmitting items of information between devices of an indirectly controlled exchange system, in particular a telephone exchange system In a process for transmitting items of information between devices of an indirectly controlled exchange system via time division multiplex (TDM) channels, with multiple repetition of the items of information, the items of information comprise a plurality ... | 01/05/1982 |
| 4295217 | Apparatus to reduce the effect of a mid-talkspurt freeze-out In reconstructing the analog waveform from a syllabically companded delta modulated digital signal transmitted over a TDMA communication channel operating at near its maximum channel capacity, the noise created in a mid-talkspurt freeze-out is greatly red... | 10/13/1981 |
| 4293948 | Data transmission system The main features of the present invention reside in the fact that one or more remote groups of subordinated terminal units are serially interconnected and arranged in a closed loop which is terminated at the output and input of a master unit. Each of sai... | 10/06/1981 |
| 4284850 | Digital memory providing fixed and variable delays in a TASI system A time assignment speech interpolation system has a random access memory which provides both a fixed and a variable delay between an input speech channel and a transmission facility. Digital samples of the signal detected on an input speech channel are st... | 08/18/1981 |
| 4276641 | Method and apparatus for converting time-division data signals received on an incoming trunk to time-division data signals of different format for transmission over an outgoing trunk Methods and apparatus for converting time-division data signals received over an incoming trunk having ve channels into time-division data signals for transmission over an outgoing trunk having vs channels (where vs >v | 06/30/1981 |
| 4224474 | Method and apparatus for demultiplexing multiplexed seismic data A seismic data acquisition system provides seismic signal data samples in multiplexed channel sequential order during a recording cycle. The multiplexed data samples from a recording cycle are demultiplexed by storing the data samples in consecutive order... | 09/23/1980 |
| 4184051 | Digital memory providing fixed and variable delays in a TASI system A time assignment speech interpolation system has a random access memory which provides both a fixed and a variable delay between an input speech channel and a transmission facility. Digital samples of the signal detected on an input speech channel are st... | 01/15/1980 |
| 4166929 | Interoffice callback arrangement A telephone switching system is disclosed with facilities for processing interoffice callback information over a common channel interoffice signaling system (4) between program controlled call processors (21, 34) in call originating and terminating office... | 09/04/1979 |
| 4153816 | Time assignment speech interpolation communication system with variable delays A time assignment speech interpolation system includes a variable length speech buffer for temporarily storing sampled signals until a transmission facility becomes available. Signals on input speech channels are converted into digital samples. If a trans... | 05/08/1979 |
| 4105864 | Stereo and spaciousness reverberation system using random access memory and multiplex A sound reproduction arrangement and audio signal delay apparatus suitable for use in such an arrangement, includes, in a listening area, one or more primary sound sources for mono- or multichannel reproduction respectively, and a plurality of secondary s... | 08/08/1978 |
| 4082922 | Statistical multiplexing system for computer communications A statistical multiplexing system is provided which includes two microprocessors with independent local memories, the microprocessors being designated as the "send microprocessor" and the "receive microprocessor," respectively. Communication between the t... | 04/04/1978 |
| 4074232 | Data sending and receiving system for packet switching network A packet switching network in which the data transmitted from a data sending terminal is temporarily stored in a packet switching exchange connected to a data sender where the data is divided into a plurality of units each of which is called a packet and ... | 02/14/1978 |
| 4058838 | Packet-switched facsimile communications system A packet-switched facsimile communication system operable in a store-and-forward mode is provided for enabling substantially simultaneous full-duplex communication between a plurality of telecommunications terminals, such as facsimile transceivers, over a... | 11/15/1977 |
| 4058672 | Packet-switched data communications 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 telecommunications terminals, facsimile transceivers or other dat... | 11/15/1977 |
| 4049906 | Message network for the transmission of digital telegrams with an address consisting of routing words A general digital message network for short address-coded telegrams having plural switching stations. In each switching station the outputs of the input stores are each connected to one of the inputs of a multiplexer. The inputs of the output stores are c... | 09/20/1977 |
| 4012719 | Communication multiplexer module A communications multiplexer module (CMM) assembles serial by bit data from a plurality of input ports into parallel-by-bit characters before transmitting them to a host computer. On output operations the host computer supplies characters parallel-by-bit ... | 03/15/1977 |
| 4012595 | System for transmitting a coded voice signal A system for transmitting a coded voice signal representative of an original analogue voice signal, for improved performance in time assignment multiplex systems. A voice signal detector detects when the magnitude of the coded voice signal exceeds a certa... | 03/15/1977 |
| 4012718 | Communication multiplexer module A communications multiplexer module (CMM) assembles serial by bit data from a plurality of input ports into parallel-by-bit characters before transmitting them to a host computer. On output operations the host computer supplies characters parallel-by-bit ... | 03/15/1977 |
