Patents
Patents for H04Q 3 - Selecting arrangements (38,975)
03/1993
03/02/1993US5191507 Polarity inverting circuit
02/1993
02/24/1993EP0527950A1 Digital computer platform for supporting telephone network applications.
02/24/1993EP0527855A1 Long distance telephone switching system with enhanced subscriber services
02/24/1993EP0527723A1 Location identification.
02/23/1993US5189697 For supplying energizing direct current from a power source
02/23/1993US5189695 Communication terminal unit for connection to an ISDN
02/23/1993US5189666 Bit-slice asynchronous transfer mode switching system
02/23/1993US5189662 Transmission network having electronically switchable nodes for switching signal paths and a method of controlling said network
02/18/1993WO1993003582A1 Crossbar with return net for scalable self-routing non-blocking message switching and routing system
02/18/1993WO1993003581A1 Message structure for scalable self-routing non-blocking message switching and routing system
02/18/1993WO1993003580A1 Scalable self-routing nonblocking message switching and routing network
02/18/1993WO1993003567A1 An atm switching arrangement
02/18/1993WO1993003565A1 An atm switching arrangement
02/18/1993WO1993003557A1 Telecommunications switching device
02/18/1993CA2114725A1 Message structure for scalable self-routing non-blocking message switching and routing system
02/18/1993CA2113725A1 Scalable self-routing non-blocking message switching and routing network
02/18/1993CA2113647A1 Crossbar with return net for scalable self-routing non-blocking message switching and routing system
02/16/1993US5187740 Method and apparatus for telephone call reorigination
02/16/1993US5187735 Integrated voice-mail based voice and information processing system
02/16/1993US5187710 Method and apparatus for the billing of value-added communications calls
02/16/1993US5187706 Dual access rings for communications networks
02/16/1993US5187705 Data error detecting apparatus for key telephone system and the detecting method therefor
02/11/1993DE4126814A1 Telephone conference circuit - has summing amplifiers for each subscriber connected to switching matrix array, and uses two transmission amplifiers to feed receive line of third participating subscriber
02/10/1993EP0527006A2 An optical switching system
02/10/1993EP0526990A2 Module comprising in an ATM exchange connection ports, each transmitting a cell indicative of a destination module in a cell header
02/09/1993WO1993003568A1 Method of communication
02/09/1993US5185824 Optical switch incorporating molded optical waveguide elements
02/09/1993US5185786 Automatic call center overflow retrieval system
02/09/1993US5185785 Method and apparatus for recording and rating telecommunication transactions made over a communication network
02/09/1993US5185784 Line switching apparatus
02/09/1993US5185782 ACD arrangement for automatically returning a call at a time specified by the original caller
02/09/1993CA1313561C Communications network state and topology monitor
02/04/1993WO1993002511A1 Modular, user programmable telecommunications system with distributed processing
02/03/1993EP0526165A2 Method of terminal control signal transmission and photonic switching system incorporating said method
02/03/1993EP0526103A2 ACD multiflow network call distribution
02/03/1993EP0525515A2 Optical space switch device
02/03/1993EP0525496A2 Method for measuring the duration of procedures in communication systems
02/03/1993EP0525432A2 Method of changing system configuration data in a telecommunications exchange system
02/03/1993EP0525243A1 Method for the display of traced information in a communication system
02/03/1993EP0525189A1 Method of displaying circuit state of telephone exchange system
02/03/1993EP0525121A1 Distributed protocol for improving the survivability of telecommunications trunk networks
02/03/1993EP0524965A1 Private telephone system with simplified command feature.
02/02/1993CA1313319C Optical switching system
01/1993
01/27/1993EP0524350A1 Telecommunication system for transmitting cells through switching nodes interconnected by groups of transmission links
01/27/1993CN1068466A Crosstalk-resistant multi-input to single output analog switching device
01/27/1993CN1068460A Current limited subscriber interface circuit
01/26/1993US5182766 Generalized telecommunications customer signaling arrangement
01/26/1993US5182751 Switching system using identical switching nodes
01/26/1993US5182750 Transparent remoting of switching network control over a standard interface link
01/26/1993US5182744 Telecommunications network restoration architecture
01/26/1993US5182554 Third party evavesdropping for bus control
01/26/1993US5182550 Inter-network connection system
01/20/1993EP0524089A1 Software structure for a data processing system, especially for a telecommunications system
01/20/1993EP0524077A1 Software structure for an information processing system
01/20/1993CN1068229A Telephone circuit assembly with hook-off detector circuit
01/19/1993US5181238 Authenticated communications access service
01/19/1993US5181199 Packet switching system
01/19/1993US5181134 Photonic cross-connect switch
01/17/1993CA2073914A1 Software structure for an information processing system
01/17/1993CA2073902A1 Software structure for data processing systems, particularly for telecommunications systems
01/13/1993EP0522895A1 Communication control apparatus
01/13/1993EP0522725A2 Voice messaging system with voice activated prompt interrupt
01/13/1993EP0307401B1 Method and apparatus for providing variable reliability in a telecommunication switching system
01/12/1993US5179589 Call progress pacing
01/12/1993US5179550 System and method for controlling a multi-point matrix switch
01/12/1993CA1312682C Frame synchronization in a network of time multiplexed optical space switches
01/12/1993CA1312665C Call traffic control
01/09/1993CA2073269A1 Module comprising in an atm exchange connection ports, each transmitting a cell indicative of a destination module in a cell header
01/07/1993WO1993000776A1 Application modularity in telecommunications exchanges
01/07/1993WO1993000775A1 Stored program controlled digital public exchange
01/07/1993WO1993000763A1 Telephone marketing system
01/07/1993DE4122276A1 Digital communication system allowing time division multiplexing - sends fault alarm via all other exchange-interconnecting cables if cable fails from first exchange drawing clock signal from this cable
01/06/1993CN1067774A Method for performing continuity check in electronic exchange system
01/05/1993CA1312394C Carrier independent network services
12/1992
12/30/1992EP0520706A1 Integrated crossjoint switch and parallel processing system using the same
12/30/1992EP0520688A2 Method of rerouting telecommunications traffic
12/30/1992EP0520483A1 Method and arrangement for establishing telephone connections
12/30/1992EP0520171A1 Subscriber line interface circuit with an off-hook detection circuit
12/30/1992EP0520156A2 Current limited subscriber interface circuit
12/30/1992EP0520083A1 Consistency protection of data in a digital telecommunications exchange system
12/30/1992EP0519956A1 An optical multiplexer
12/29/1992US5175777 Optical switching matrix including plural wavelength converting devices
12/29/1992US5175765 Determining if transmissions over a network are reliable
12/29/1992US5175761 Call transfers by voice messaging system (VMS) integrated to a private branch exchange
12/29/1992US5175640 Interleaved receivers
12/29/1992US5175539 Interconnecting network
12/29/1992CA1312134C Cell switching system of asynchronous transfer mode
12/29/1992CA1312132C Telephone exchange including service feature apparatus
12/26/1992CA2071447A1 Crossbar switch and parallel processing system using the same
12/16/1992EP0518449A1 Optical interconnection apparatus
12/16/1992EP0518432A2 Digital subscriber line circuit for connecting an ISDN subscriber to the trunk side of a digital exchange
12/16/1992EP0518344A2 Connection set-up between networked mobile subscriber terminals
12/15/1992US5172412 Subscriber circuit capable of suppressing in-phase induced noise
12/15/1992US5172259 Embedded control network
12/15/1992CA1311384C Multi-stage switching network for light waveguides
12/10/1992WO1992022034A1 A high-performance host interface for atm networks
12/10/1992CA2109917A1 A high-performance host interface for atm networks
12/09/1992EP0517446A2 A replicating method for a switching system, in particular a telephone exchange
12/09/1992EP0517442A2 Transferring lines in a digital SLC system
12/09/1992EP0517344A1 Optical correlation apparatus