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| Number | Title | Issue Date |
| 5008881 | Chordal ring network A plurality of NIUs are interconnected by a multiple channel communications medium, and each NIU includes a sequence of inputs and outputs. Each channel is connected to a separate input, and exits the NIU at a separate output. The output that each channel... | 04/16/1991 |
| 4993022 | System for and method of multiplexing speech signals utilizing priority signals for individual transmission channels A system for and a method of multiplexing digital speech signals corresponding to speech signals inputted from a plurality of terminals, the digital speech signals including a plurality of speech unit signals, in which a weighted priority signal is produc... | 02/12/1991 |
| 4993014 | Dynamic shared facility system for private networks This invention relates to a dynamically shared facility network (DSFN) providing private network service to a plurality of customers using switched facilities of a common carrier network. A plurality of serving offices are connected via access links to cu... | 02/12/1991 |
| 4899339 | Digital multiplexer N framing units block N-channel input digital signals, respectively, to provide blocked signals. The framing units respond to a common block synchronization signal from a multiplexing unit to provide the blocked signals in a time relation suitable for mul... | 02/06/1990 |
| 4856091 | Radiation-coupled daisy chain In a processing system (FIG. 1), peripheral boards (101-103) interconnected by a stack bus with a system board (100) each have an optical emitter (163) mounted on one face and an optical detector (162) mounted on the other face. The system board has an op... | 08/08/1989 |
| 4852091 | High capacity communication system utilizing OR-type channels A methodology is disclosed for effecting contention-free communication over a plurality of OR-type lines interconnecting numerous synchronized stations. In broad terms, each station having a message to transmit executes a prescribed encoding/decoding algo... | 07/25/1989 |
| 4847828 | Analog data signal switching network with means for cross-connecting analog signals to output lines by double-stage sampling In a switching network for switchingly and selectively deliver a particular one of a plurality of input channel signals to a specific one of a plurality of ouptut channel lines according to a channel selection signal, the input channel signals are sampled... | 07/11/1989 |
| 4841521 | Method and system for bidirectionally transmitting data A method and a system for bidirectional transmission/reception of data between two terminal stations, in which each transmission period is divided into a plurality of first time sections for relatively low speed data transmission and at least one second t... | 06/20/1989 |
| 4811361 | Method and apparatus for transmission of digital data A method and apparatus for transmission of digital data in which data words having M parallel bits are encoded into code words having N parallel bits, the code words being serially transmitted and being accompanied by flags such as Start Delimiter, End De... | 03/07/1989 |
| 4803679 | Communication network capable of automatically informing a subscriber of occurrence of an idle channel In a communication network comprising a base station and a plurality of substations communicable with the base station through radio channels including a control channel, at least one of the substations comprises a memory unit (31) for storing an identifi... | 02/07/1989 |
| 4792946 | Wireless local area network for use in neighborhoods A local area network for digital information transmission to and from each of a plurality of building units in an area, such as homes in a neighborhood is provided, wherein all connections between units are wireless. Each unit is provided with and fm tran... | 12/20/1988 |
| 4787083 | Bus-method communication network system capable of seizing transmission right by using timer means at each station A bus-method communication network has a number of stations with assigned station numbers. An exclusive right or priority of transmission is transferred from a first station to a second station by transmission of an abort signal including synchronization ... | 11/22/1988 |
| 4757371 | Still picture transmission apparatus A still picture transmission apparatus in which still picture data is transmitted in packet form from a central terminal having a picture data bank selectively to a plurality of local terminals through a common transmission line at which a plurality of di... | 07/12/1988 |
| 4752924 | Ring packet switch A data communication network comprising a plurality of nodes interconnecting transmission paths in a ring structure arranged to propagate data messages between data systems coupled to the network by the nodes in opposite directions around the network ring... | 06/21/1988 |
| 4727538 | Information transfer method and arrangement A local area network comprising a plurality of terminals interconnected by a communication bus is disclosed. Each terminal comprises a memory, a main processor, and a co-processor. To transmit information in a communication mode, the main processor loads ... | 02/23/1988 |
| 4715032 | Method and apparatus for the connection of a closed ring through a telephone exchange A method and apparatus which relate to a digital telecommunication system in which information is transferred between terminals (T1-Tn) connected to a telephone exchange for establishing a ring with the aid of a loop connection to enable sending data betw... | 12/22/1987 |
| 4692919 | Communications network In order to prevent a communications failure in a communications network wherein many terminals share a common communications channel or bus and respond to a network controller over the communications bus to enable the terminals to have access to the bus ... | 09/08/1987 |
| 4689786 | Local area network with self assigned address method A local area network is disclosed including apparatus and methods for transferring data between a plurality of data processing resources ("agents") coupled to a cable. In the preferred embodiment, a plurality of agents are coupled to a common cable for da... | 08/25/1987 |
| 4665519 | Wireless computer modem A wireless modem includes a radio transceiver and microprocessor-based controlling circuitry. Two or more modems can be individually ported to host computer devices to link them within a computer local area network. Computer data is broadcast in discreet ... | 05/12/1987 |
| 4663758 | Wideband integrated services local communication system The system comprises a plurality of units arranged along a unidirectional line whereupon information is transmitted relevant to circuit switched and packet switched communications and organized into hybrid frames comprising a region for each communication... | 05/05/1987 |
| 4637015 | Packet transmission and reception via a shared DMA channel A DMA channel is shared by transmit and receive ports via which data packets are transmitted and received using a bit oriented protocol such as HDLC. For the transmission of each packet, an abort signal of the protocol is initially transmitted, and the pa... | 01/13/1987 |
| 4538262 | Multiplex bus system for controlling the transmission of data between a master control unit and a plurality of remotely located receiver-transmitter units A multiplex bus system comprises a master control unit (MCU) connected to at least one receiver-transmit unit (RTU) by a data bus. The MCU transmits to the RTU a message comprising a synchronization pulse of known duration and successive time spaced timin... | 08/27/1985 |
| 4528663 | Peak load access in a two-way CATV contention system In a two-way cable television (CATV) contention system peak upstream loading is accommodated by varying the length of the upstream transmission window during which a subscriber may randomly transmit for improved subscriber access to the CATV headend. Foll... | 07/09/1985 |
| 4523299 | Message transmitting system for reproduction machines and copiers A copy reproduction machine is subdivided into discrete operating modules and coupled together by a shared communication line over which operating messages from and to the modules are transmitted. Each module includes a receiver for intercepting and captu... | 06/11/1985 |
| 4509073 | Two-way cable-television system A two-way (interactive) cable television system is disclosed which has distributed processing and which employs a cable-distribution subsystem that includes corrective regenerators each of which ignores noise (invalid signals) and, when overloaded, ignore... | 04/02/1985 |
| 4500989 | Digital communication system A multiple access digital communication system having fixed or variable length messages each separated into message groups, each group having messages numbered from O to N and in which there can optimally accommodated, on the same network a combination of... | 02/19/1985 |
| 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 up of a variable number of fixed-length packets. This syst... | 10/18/1983 |
| 4398288 | Loop type data highway system for data transmission The periodicity of an input signal is monitored by means of a re-triggerable one-shot multivibrator. When an input signal interruption is detected by the output of the multivibrator, the state of the input signal interruption is held to interrupt the tran... | 08/09/1983 |
| 4387458 | High capacity secure address loop network A loop network is disclosed in which the ports have access to time slots on each of two buses. The buses carry the time slots in opposite directions. Ports are addressed by marking a bit of a time slot word on one bus and a bit of a time slot word on the ... | 06/07/1983 |
| 4334305 | Data-handling system with operatively interconnected processors A number of data processors have access, via respective interfaces, to a common ring memory made up of cascaded shift-register sections. Each interface comprises a pair of shift registers or a pair of read/write memories one of which, at a given instant, ... | 06/08/1982 |
| 4310922 | Bit sampling multiplexer apparatus A bit-sampling multiplexer apparatus includes two terminals, each having a transmitter portion and a receiver portion. A transmitter in one terminal multiplexes data on a plurality of incoming data channels into a serial data frame, and couples this frame... | 01/12/1982 |
| 4220821 | Off-hook initiated demand assignment communications Off-hook initiated demand assignment (OHIDA) has particular application in communications satellite systems and provides basic demand assignment trunk service by utilizing an off-hook and on-hook signal processing system to monitor and control terrestrial... | 09/02/1980 |
| 4177450 | Process and method to initiate a receiving and transmitting station linked by a connecting channel of an information exchange system consisting of several transmitting and receiving stations A communications system in which control or access to a channel is distributed among the several transmitting-receiving station linked by the channel rather than being centralized or under a master station control.... | 12/04/1979 |
| 4048441 | Error control for digital multipoint circuits A multipoint synchronous data network is formed by junction units which provide signal paths that interconnect incoming branch lines to a common outgoing branch. The junction units arranged to combine the branches so that data words on one branch are prop... | 09/13/1977 |
| 4004099 | Time division multiplex switching system A time division multiplex private automatic branch exchange includes a common interchange bus, and as many sampling circuits and associated recirculating shift registers as there are telephones. Two telephones are connected to each other through the bus w... | 01/18/1977 |
