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)
04/1989
04/26/1989EP0313313A2 Communication system and communication method
04/26/1989EP0312911A2 Apparatus and method for master/slave synchronization
04/26/1989EP0312828A1 Circuit arrangement for routinely testing the timing distribution of a plurality of units operated with the same timing
04/26/1989EP0312806A1 Method and arrangement for data transfer for a digital switching system
04/26/1989CN1004045B Improved time division multiplexed switching structure for pbx
04/25/1989US4825433 Digital bridge for a time slot interchange digital switched matrix
04/25/1989US4825349 Emergency D.C. power supply with the emergency state being indicated by polarity reversal
04/25/1989CA1253243A1 Telecommunications exchanges allocating variable channel bandwidth
04/18/1989US4823342 Time division exchange system having functions of compressing and expanding information
04/18/1989US4823340 Circuit arrangement for non-blocking switching of PCM channels in the space and time domain
04/18/1989CA1252873A1 Ring packet switch
04/18/1989CA1252871A1 Agent communication arrangements for telecommunication systems
04/18/1989CA1252869A1 Operator communication arrangements for operator assistance systems
04/18/1989CA1252865A1 Glitchless clock signal control circuit for a duplicated system
04/18/1989CA1252864A1 Discretionary call forwarding
04/18/1989CA1252860A1 Pre-cutover verification of switching system subscriber lines served via digital carrier facilities
04/18/1989CA1252822A1 Spread spectrum wireless pbx
04/18/1989CA1252821A1 Photonic switching
04/13/1989DE3732679A1 Method of transmitting information in transparent code in the signalling channel of a switching device subscriber connection
04/12/1989EP0311347A2 Robust, collateral messaging and recovery system and method within a digital switch
04/12/1989EP0311181A2 Circuit arrangement for guaranteeing in time the correct channel allocation in a digital message communication system
04/12/1989EP0311018A1 Method for switching a line card to an associated line card in telecommunication exchanges, especially PCM time division multiplex telephone exchanges
04/11/1989US4821265 Node architecture for communication networks
04/11/1989US4821264 Adaptive concentration communication network ISDN access
04/11/1989US4821259 Control information communication arrangement for a distributed control switching system
04/11/1989US4821256 Method for monitoring information transmission in connected through four-wire connecting paths, more particularly semipermanently connected through connecting paths in digital time multiplex exchanges
04/11/1989US4821255 Cross-connection of wavelength-division-multiplexed high speed optical channels
04/11/1989US4821034 Digital exchange switch element and network
04/11/1989CA1252548A1 Meet-me conference with control capabilities
04/11/1989CA1252547A1 Interactive facility control arrangement
04/06/1989DE3732823A1 Process for a modularly structured digital communication system with a number of different terminals
04/05/1989EP0310066A2 Programmable multiplexing/demultiplexing system
04/05/1989EP0310058A2 Time and wavelength division switching system
04/05/1989EP0309851A2 Procedure for connecting two terminals at the instigation of a third in a digital communiation system
04/04/1989US4819230 Optimized bandwith allocation mechanism between circuit slots and packet bit stream in a communication network
04/04/1989CA1252234A1 Method of multiplexing digital signals
03/1989
03/30/1989DE3731340A1 Circuit arrangement to test statically and dynamically running switching processes within digital communication systems
03/30/1989DE3731339A1 Method of monitoring memory devices in digitally controlled communication systems
03/28/1989US4817094 Fault tolerant switch with selectable operating modes
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/28/1989US4817086 Communication system
03/28/1989US4817085 Data communication system having a packet switching network
03/28/1989US4817083 Rearrangeable multiconnection switching networks employing both space division and time division switching
03/28/1989US4817082 Crosspoint switching system using control rings with fast token circulation
03/28/1989US4816826 Digital telephone switching system having a message switch with address translation
03/28/1989CA1251844A1 Telecommunication system, in particular telephone system
03/22/1989EP0307577A2 Method for controlling the establishment and the release of connections in a digital PCM telephone switching exchange
03/22/1989EP0307401A1 Method and apparatus for providing variable reliability in a telecommunication switching system.
03/21/1989US4815072 Switching arrangements for digital telecommunications exchange systems
03/21/1989US4815071 Packet-switched communications network for efficiently switching non-burst signals
03/21/1989CA1251584A1 Digital signal cross-connection system
03/21/1989CA1251546A1 Terminating port determination in a distributed control switching system using a distributed database
03/15/1989EP0306693A1 Digital communication system with a modular structure
03/15/1989EP0306633A2 Method for the insertion of audible tones in existing voice connections in a telephone exchange
03/14/1989US4813037 Switching system
03/14/1989US4812839 System for controlling network activation sequence
03/14/1989CA1251266A1 Distribution device for a triple clock generating signals with a synchronisation component
03/08/1989EP0305992A2 Drop/insert processing circuit
03/08/1989EP0305587A2 Circuit arrangement for a telecommunication installation, in particular a private branch exchange with subscriber and trunk groups and interface modules
03/08/1989EP0305586A2 Circuit arrangement for a telecommunication installation, in particular a private branch exchange with subscriber and trunk groups and interface modules
03/07/1989US4811378 Communication switching system
03/07/1989US4811358 Subscriber line interface modem
03/07/1989US4811336 Switching arrangement for communication of digital signals, in particular PCM signals
03/07/1989US4811335 Broadband/narrow-band switching network of the time-space-time type and time and space switching stages for broadband/narrow-band channels
03/07/1989US4811334 Method of operation of a nodal telephone and data communication network to provide specific facilities in changeable domains of the network
03/07/1989US4811333 Substantially non-blocking space switching arrangement
03/07/1989US4811332 Apparatus and method for TDM data switching
03/07/1989CA1250938A1 Controlling multi-port hunt groups in a distributed control switching system
03/07/1989CA1250937A1 Directory number translation in a distributed control switching system
03/07/1989CA1250935A1 Dynamic bandwidth allocation mechanism between circuit slots and packet bit stream in a communication network
03/07/1989CA1250934A1 Method of operating a telecommunication switching system or the like
02/1989
02/28/1989US4809272 Telephone switching system with voice detection and answer supervision
02/28/1989US4809270 Variable time slot communication system
02/28/1989US4809269 Dual-port timing controller
02/28/1989US4809263 T-type switching system for broadband switching system and time switching stage for use in a t-stage
02/28/1989US4809261 Space and time switch for 22 PCM highways
02/28/1989US4809260 Telephone exchange
02/28/1989US4809259 Arrangement for establishing wide band connection in a switching network
02/28/1989US4809258 Circuit arrangement for the indication of loop closure during the ringing condition
02/28/1989US4808905 Current-limiting circuit
02/28/1989CA1250673A1 Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
02/28/1989CA1250647A1 Terrestrial communications system
02/23/1989DE3726359A1 Process and arrangement for delay equalisation between codewords of a digital sound signal transmitted over separate channels
02/22/1989EP0303870A2 Modular structured digital communication system with operational and reliable components
02/22/1989EP0303869A1 Digital communication system with a modular structure comprising technical operation communication means
02/21/1989US4807227 Optical wavelength-division switching system with coherent optical detection system
02/15/1989EP0303093A2 Communication system provided with a connexion network constructed as a ring network in the subscriber area of a digital switching exchange
02/14/1989US4805214 Digital signal transmitting circuit for telephone network
02/14/1989US4805209 Coordinated transfer of voice and information through a digital switch
02/14/1989US4805172 Time division multiplex (TDM) switching system especially for pulse code modulated (PCM) telephony signals
02/14/1989US4805166 Switch path reservation arrangement
02/14/1989US4804956 Rearrangeable digital signal space division switching system
02/09/1989WO1989001278A1 Digital data communications terminal and modules therefor
02/09/1989WO1989001277A1 Controlling key-system groups from a distributed control switching system
02/08/1989EP0302246A1 Communication system with an ISDN terminal connector for different ISDN interfaces in an ISDN switching network
02/08/1989EP0302055A1 Network for message switching between a plurality of processing units
02/08/1989CN1031003A Protocols for very high-speed optical lans
02/07/1989USH586 ISDN D channel handler
02/07/1989US4803699 Bus apparatus with a plurality of transmitters
02/01/1989EP0182812B1 Distributed packet switching arrangement
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