Patents
Patents for H04Q 11 - Selecting arrangements for multiplex systems (43,004)
02/1990
02/28/1990EP0356012A2 TDM Demultiplexer
02/28/1990EP0355797A2 Signalling apparatus for use in an ATM switching system
02/28/1990EP0355777A2 Communication apparatus for displaying information concerning call receptions
02/28/1990EP0355714A2 Method and apparatus for initiating communication services
02/28/1990EP0355697A2 Multimedia bidirectional broadcast system
02/28/1990EP0203151B1 Loop around data channel unit
02/28/1990EP0203150B1 Method and apparatus for looping around a digital transmission line at a channel unit
02/27/1990US4905237 Communications system comprising an ISDN terminal equipment connection for different ISDN interfaces in an ISDN switching equipment network
02/27/1990US4905236 Circuit arrangement for designational reading of information of a bit group oriented, continuous information stream at an ISDN-oriented interface
02/27/1990US4905227 Circuit for subscriber line interface circuits in a digital time-division multiplex communication switching center
02/27/1990US4905226 Double-buffered time division switching system
02/27/1990US4905225 Communication system for timing multiplex hybrids
02/27/1990US4905223 Wideband/multislot switching arrangement
02/27/1990US4905222 Circuit arrangement for centrally controlled time division multiplex telecommunication switching systems, particularly PCM-telephone switching systems with line trunk groups connected to a switching matrix
02/27/1990US4905220 Circuit for a central control time division multiplex PCM telecommunications system
02/20/1990US4903263 Apparatus and method for providing existing telephone switching equipment with integrated services digital network capability
02/20/1990US4903260 Digital circuit-switching and packet-switching network and switching facility therefor
02/20/1990US4903259 Time-division multiplex switching network
02/20/1990US4903258 Modularly structured digital communications system
02/20/1990CA1266091A1 Fiber optic telecommunications device
02/15/1990DE3827493A1 Method and arrangement for implementing data connections in a communication switching system
02/14/1990CN1039667A Multi-link chip
02/13/1990US4901347 Circuit arrangement for telecommunication switching systems, particularly PCM-time-division multiplex telephone switching systems with a central matrix and with local sub-switching matrices connected to the same
02/13/1990US4901309 Cross-connect for switch modules
02/13/1990US4901308 Digital bridge for a time slot interchange digital switched matrix
02/13/1990CA1265879A1 Data framing system for time division multiplexing transmission
02/08/1990DE3932700A1 Connection testing in communication network - has test signals with time channel addresses, if network is of TDM type
02/07/1990EP0354120A1 Method and device for asynchronous transmission using microcells
02/07/1990CN1039516A Method and apparatus for through-connecting wideband connection in digital time switch
02/06/1990US4899358 Call announcement arrangement
02/06/1990US4899336 Centrally controlled telecommunications exchange system
02/01/1990DE3825898A1 Method for dynamic allocation of function keys to telephone terminal functions which can be invoked by said keys
02/01/1990DE3825895A1 Telephone terminal with function keys
01/1990
01/31/1990EP0353102A2 Automatic call distribution (ACD) switching system having distributed processing capability
01/30/1990US4897866 Telecommunication system with subscriber controlled feature modification
01/30/1990US4897830 Optical networks
01/30/1990US4896934 Broadband optical multicast switch
01/30/1990CA1265273A1 Integrated calling directory
01/30/1990CA1265268A1 Data transmission equipment
01/30/1990CA1265228A1 Central exchange
01/30/1990CA1265227A1 Method for monitoring and controlling the traffic in digital transmission networks
01/25/1990WO1990000850A1 Method and apparatus for through-connecting a wideband connection in a digital time switch
01/24/1990EP0351959A2 Multi-channel controller
01/24/1990EP0351729A2 Optical switching system
01/23/1990US4896350 Arrangement for providing a call-connection service
01/23/1990CA1264845A1 Digital telephone switching system having a message switch with address translation
01/23/1990CA1264843A1 Semiconductor integrated switching apparatus
01/18/1990DE3918709A1 Transmission device in accordance with CCITT Recommendation 1.430
01/18/1990DE3821871A1 Broadband coupling device
01/17/1990EP0351386A1 Method and apparatus for through-connecting a widebandconnection in a digital time switch
01/17/1990EP0351181A2 Packet switching system for a distributed processing ISDN switch
01/17/1990EP0350844A2 Method of transferring terminal programme parameters from an exchange to the terminals
01/17/1990EP0350836A2 Communication system with terminals having features determined and controlled by the communication link
01/16/1990US4894861 Terminal in communication network for notifying originating party's number
01/16/1990US4894821 Time division switching system with time slot alignment circuitry
01/16/1990US4894818 Optical packet switching system using multi-stage combination of light triggering switches
01/11/1990WO1990000339A1 Method of automatically editing data for controlling a processor that carries out distributed control and a system using the same
01/10/1990EP0350402A1 Personal computer integrating a digital ISDN subscriber terminal
01/10/1990EP0349597A1 Improvements in electro optical switch architectures.
01/10/1990EP0195051B1 Trunk call processing services for host computer interconnections
01/10/1990CN1006438B Data-converting block
01/09/1990US4893336 Call forwarding arrangement
01/09/1990US4893310 Digital key telephone system
01/09/1990US4893309 Digital interface between at least two subscriber line interface circuits and a processing unit
01/09/1990US4893301 Automatic call distribution (ACD) switching system having distributed processing capability
01/03/1990EP0349346A2 Communication terminal apparatus and its control method
01/03/1990EP0349079A2 Ciruit arrangement for the transmission of information
01/03/1990CN1038563A Time-sharing program-controlled exchanger
01/02/1990US4891813 Passive bus communication using alternate CRC
12/1989
12/28/1989WO1989012938A1 Response control system
12/27/1989EP0347903A2 High-speed optical packet switching system using optical buffer between incoming and outgoing channels
12/27/1989EP0347644A1 Modular digital communication system
12/27/1989CA1264081A1 Distributed voice-data switching on multi-stage interconnection networks
12/26/1989US4890303 Method and circuit for synchronizing a digital data transmission system with a network-external clock
12/26/1989US4890254 Clock disabling circuit
12/20/1989EP0347155A2 Communication apparatus
12/19/1989US4888766 Multi-terminal control system
12/13/1989EP0345891A1 Switching system for switching packet oriented data as well as circuit oriented data
12/13/1989CN1038006A Packet switches, switching methods, protocols and network
12/12/1989US4887264 Digital key telephone system
12/12/1989US4886335 Optical fiber switch system
12/12/1989CA1263899A1 Synchronization circuitry for duplex digital span equipment
12/12/1989CA1263898A1 Synchronization arrangement for time multiplexed data scanning circuitry
12/07/1989DE3818087A1 Digital communications system with a computer controller
12/06/1989EP0344534A1 Method of monitoring the quality of digital signals in sections of a transmission line
12/06/1989EP0197103B1 Load balancing for packet switching nodes
12/05/1989US4885769 Station controller for enhanced multi-line pick-up in centrex exchange telephone system
12/05/1989US4885739 Interprocessor switching network
12/05/1989US4885738 Method of and apparatus for establishing a wideband communication facility through a switched communications network having narrow bandwidth time division multiplexed channels
12/05/1989CA1263728A1 Arrangement for transferring data to a centrex
11/1989
11/30/1989DE3816747A1 Circuit-switching packet switching device
11/29/1989EP0343608A2 Digital signal exchange equipment
11/28/1989US4884269 Method and apparatus for connecting ISDN devices over an analog telephone line
11/23/1989EP0342861A2 Smoothing apparatus for independently clocked networks
11/23/1989EP0342844A2 Smoothing apparatus for independently clocked networks
11/23/1989EP0342720A1 Method of controlling in a quasi-parallel mode a plurality of peripheral units from a single control unit and a system for implementing this method
11/23/1989EP0342510A1 Method for the insertion of message packets with a fixed length in a pulse frame of a digital transmission system
11/23/1989EP0342469A1 Method of inserting an asynchronous 139 264 kbit/s signal in a 155 520 kbit/s signal
11/21/1989CA1263169A1 Arrangement for establishing wide band connection in a switching network
11/21/1989CA1263168A1 Telecommunication system for alternatingly transmitting circuit-switched and packet-switched information