Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 11 - Selecting arrangements for multiplex systems
Patents for H04Q 11 - Selecting arrangements for multiplex systems (43,004)
04/1991
04/10/1991EP0138950B1 A distributed prioritized concentrator
04/10/1991CN1050658A Switching node for communications switching network
04/10/1991CN1050657A Resource-decoupled architecture for telecommunications switching system
04/09/1991US5007076 Call announcement arrangement
04/09/1991CA1282882C Frame checking arrangement for duplex time multiplexed reframing circuitry
04/04/1991WO1991004642A2 Serial array time-slot interchangers
04/04/1991WO1991004639A1 Digital telecommunications device
04/04/1991DE3931776A1 Digitale telekommunikations-vorrichtung Digital telecommunication device
04/04/1991CA2024246A1 Coordination method for multi-user system conformance testing
04/03/1991EP0420623A2 Communication apparatus and method
04/03/1991EP0420531A2 Channel adapter for broadband communications at channel speeds
04/03/1991EP0420528A2 Dynamic transport facility identification
04/03/1991EP0420527A2 Electronic messaging systems with additional message storage capability
04/03/1991EP0420432A2 A resource-decoupled architecture for a telecommunications switching system
04/03/1991EP0420204A2 Method for the transmission of subscriber data from one secret subscriber to another in communication exchanges
04/03/1991EP0419973A2 Method for activating an optical display in a communication terminal of a switching exchange
04/03/1991EP0419960A2 Circuit for testing parts of a digital time-multiplexed telecommunications exchange, especially telephone exchange
04/03/1991EP0419920A1 Circuit arrangement for a central controlled telecommunication exchange, especially a PCM telephone exchange, with a central coordination processor and decentralized terminal groups with group processors
04/03/1991EP0419750A1 Distribution mechanism for establishing communications between user interfaces of a communication system
04/03/1991EP0419720A1 Fibre-optical telecommunication system with one or more optical switches inserted in the optical path
04/03/1991EP0419710A1 Bidirectional fibre-optical telecommunication system for wavelength division multiplexing between a central telecommunication station and a number of remote telecommunication stations
04/03/1991CN1050480A Message routing check system
04/02/1991US5005170 Multi-rate multiplexing arrangement efficiently utilizing multiplexed channel bandwidth
04/02/1991US5005167 Multicast packet switching method
04/02/1991US5005166 Time and wavelength division switching system
04/02/1991CA1282483C Packet-switched communications network for efficiently switching non-burst signals
03/1991
03/29/1991CA2026232A1 Bidirectional light waveguide (lwg) telecommunication system and method for wavelength separation mode (bidirectional wavelength separation mode (wdm) between a central telecommunication location and a plurality of decentralized telecommunication location
03/28/1991DE3936036C1 Signalling converter for telecommunications - connects digital exchange station with analog exchange centre
03/27/1991EP0419019A1 Message routing check system
03/27/1991EP0418851A2 ISDN D-channel interface
03/27/1991EP0418813A2 Routing method and routing system for switching system having a plurality of paths
03/27/1991EP0418475A2 Time switch
03/26/1991US5003560 Receiving counter phase synchronization circuit of the synchronous transmission system
03/26/1991CA1282152C Digital circuit- and packet-switching network and switching facility therefor
03/26/1991CA1282151C Microprocessor back-up system
03/26/1991CA1282150C Packet switch
03/21/1991WO1991001027A3 Illegal sequence detection and protection circuit
03/20/1991EP0417943A2 Cell transfer apparatus and method using a variable rate codec
03/20/1991EP0417788A2 Communication terminal having means for controlling power transfer
03/19/1991US5001740 Method and apparatus for starting switching system
03/19/1991US5001710 Customer programmable automated integrated voice/data technique for communication systems
03/19/1991US5001709 Communication system and apparatus
03/19/1991US5001708 Sonet H4 byte generator
03/19/1991CA2025500A1 Message routing check system
03/19/1991CA1281801C Time division multiplex (tdm) switching system especially for pulse code modulated (pcm) telephony signals
03/19/1991CA1281799C Remote maintenance system for digital communication network
03/13/1991EP0138952B1 A self-routing switching network
03/12/1991US4999836 ISDN network termination unit enabling to establish data link between one terminal equipment and other terminal equipments connected to the unit without use of subscriber line
03/12/1991US4999835 Method and device for asynchronous mode transmission putting microcells into use
03/12/1991US4999832 Broadband multirate switching architecture
03/12/1991US4999830 Communication system analog-to-digital converter using echo information to improve resolution
03/12/1991US4998791 Integrated optical switches with very high extinction ratios
03/12/1991CA1281399C Electronic telephone exchange and method of connecting ports ofthe exchange
03/12/1991CA1281398C Time division circuit switch
03/07/1991DE3930040A1 Data transmission circuitry for digital communication network - uses digital telephone in conjunction with interface circuits to drive variety of terminals
03/06/1991EP0415161A2 Method for the distribution of menages in a computer controlled installation
03/06/1991EP0415112A2 Cross-connection method for STM-1 signals of the synchronous-digital multiplexhierarchy
03/06/1991EP0414951A1 Method for the through-connection of voice or data information transmitted by time multiplex lines via a switching network
03/06/1991EP0414950A1 Method of switching voice and/or data information distributively transmitted in several time slots
03/06/1991EP0256027B1 Method for the simultaneous operation of several terminal equipments on one network termination unit of a broadband network
03/06/1991CN1011938B Number seeking and tansfering in distributing control system
03/06/1991CN1011936B Modular structure of integrated service data network communication system of producing and displaying fault literal information
03/05/1991WO1991003901A1 Time-division multiplex data relay exchange system
03/05/1991US4998274 ISDN dual bus extension phone system
03/05/1991US4998249 Method and system for multiplexing telephone line circuits to highway lines
03/05/1991US4998248 Integrated services digital network (ISDN) system and multimedia data connection method in same system
03/05/1991US4998243 ISDN terminal adapter with teleconference provision
03/05/1991US4998242 Virtual tributary cross connect switch and switch network utilizing the same
03/05/1991US4998240 Method of and system for remote testing of integrated services digital networks
02/1991
02/28/1991DE3928007A1 Broker telephone installation using ISDN devices - provides connections to public or private telephone network and direct cross-connections between broker stations
02/27/1991EP0413827A1 Isdn composite switching system
02/26/1991US4996704 Electronic messaging systems with additional message storage capability
02/26/1991US4996685 Technique for dynamically changing an ISDN connection during a host session
02/21/1991WO1991002437A1 Improved packet routing switch
02/20/1991EP0413490A2 Resource allocation scheme
02/20/1991EP0413488A2 Arrangement for regulating traffic in a high speed data network
02/19/1991US4995073 Communication apparatus and communication system having automatic attribution switching
02/19/1991US4995042 Switching exchange
02/19/1991US4995034 Method of integrating one or more accessory function modules in telecommunications systems and access circuit for use therewith
02/19/1991US4995033 Digital private branch exchange and method of manufacturing same
02/19/1991US4995031 Equalizer for ISDN-U interface
02/19/1991CA1280495C Distributed packet switching system
02/19/1991CA1280494C Control information communication arrangement for a distributed controlswitching system
02/19/1991CA1280485C Apparatus for serial data transmission
02/14/1991DE3926107A1 Network closure for TEMEX data transmission - has separate TEMEX control between available, standard control points, with input and output control points for TEMEX terminals
02/13/1991EP0412799A2 Telephone communication system
02/13/1991EP0412461A2 Facsimile apparatus and facsimile transmission method for digital communication network
02/13/1991EP0412413A2 Circuit arrangement for fixed connections in digital communication networks
02/13/1991EP0412327A2 Multihop time assigned speech interpolation (TASI) system for telecommunication networks
02/13/1991CN1049257A Message switching arrangements
02/12/1991US4993019 Line unit interface circuit
02/12/1991US4993017 Modularly structured ISDN communication system
02/12/1991US4993016 Network control arrangement for processing a plurality of connection requests
02/07/1991WO1991001603A1 Data transmission on optical networks
02/07/1991WO1991001600A1 Digital added main line system
02/06/1991EP0411796A2 Semi-automated operator assistance telecommunication calls
02/06/1991EP0411742A2 Message switching arrangements
02/06/1991EP0411562A2 A fast packet and frequency switch
02/06/1991EP0138949B1 A wideband digital switching network
02/06/1991CN1049079A Digital added main line system
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