Patents
Patents for H04Q 3 - Selecting arrangements (38,975)
07/1991
07/30/1991CA1287196C Subscriber/craftsperson ringback apparatus
07/30/1991CA1287152C Inter-network connection system
07/24/1991CN1053338A Method of managing traffic flows in wideband integrated services digital telecommunications network, and network for implementing method
07/23/1991US5034915 Data storage system for transferring last entered information from static memory to magnetic disk upon recovering from data storage interruption
07/23/1991CA1286761C Rearrangeable multiconnection switching networks employing both space division and time division switching
07/23/1991CA1286760C2 Pbx intercept and caller interactive attendant bypass system
07/23/1991CA1286759C Telephone toll service with advertising
07/23/1991CA1286757C Call data collection and modification of received call distribution
07/23/1991CA1286751C Switching arrangement
07/17/1991EP0437256A2 Automatic number identification blocking system
07/17/1991EP0436958A2 Cell signal processing circuit and optical switch apparatus using the same
07/17/1991EP0436799A2 Communication network with key distribution
07/16/1991US5033081 Key telephone system
07/16/1991US5033076 Enhanced privacy feature for telephone systems
07/16/1991US5032837 Method for expanding N×N three-stage switching network to 2N×2N three-stage switching network
07/10/1991EP0436201A1 Method for searching for alternate path in communication network
07/10/1991EP0436069A2 Method and device for switching fixed-length packets such as ATM cells
07/10/1991CN1013164B Total data communication exchange system
07/09/1991US5031211 Communication circuit switching or parallel operation system
07/09/1991US5031094 Switch controller
07/03/1991EP0435669A2 Output stage for telephone interface circuit and telephone interface circuit
07/03/1991EP0435448A2 Arrangement for routing packetized messages
07/03/1991EP0435296A1 Optical space switch and network with such optical space switches
07/03/1991CN1013069B Multi-link chip
07/02/1991US5029196 Automated call screening
07/02/1991US5029165 Method of allotting links and routing messages for a common channel type signalling transfer point
07/02/1991US5029161 Maintenance system for subscriber terminal management data in a packet switched network
06/1991
06/27/1991WO1991009480A1 Synchronous-asynchronous converter
06/27/1991DE3942146A1 Message segment transmission circuit between subscriber stations - separates portion of address from each message segment forwarded to common path for all transmission operations
06/27/1991DE3942139A1 Multiprocessor system e.g. for digital telephone station - performs readiness check of each sub-processor by master processor before assigning addresses
06/26/1991EP0434629A2 Method and apparatus for processing the signalling information within configurable multiplexers
06/26/1991EP0433964A2 Name resolution in a directory database
06/26/1991EP0433465A1 Personal communication system
06/25/1991US5027387 Reverse direction calling system
06/25/1991US5027384 Personalized automatic call routing
06/25/1991US5027358 Switch-adjunct communications protocol
06/25/1991US5027346 Node apparatus for parallel communication
06/23/1991CA2030909A1 Name resolution in a directory database
06/19/1991EP0433256A2 Telecommunication combination comprising a switched telecommunication network and a portable radio terminal
06/19/1991EP0433154A1 Synchronous-asynchronous converter
06/19/1991EP0433078A2 Data transfer method and apparatus
06/18/1991CA1285055C Three-stage coupling arrangement
06/18/1991CA1285053C T1 line format for robbed signaling for use with ccitt 32k bit per second adpcm clear channel transmission
06/18/1991CA1285020C Direct current power supply with an emergency supply activated by a polarity reversal
06/18/1991CA1284904C Optical space switch
06/16/1991WO1991009506A1 Telecommunication combination comprising a switched telecommunication network and a portable radio terminal
06/15/1991CA2019019A1 Method and system for high speed data transfer
06/14/1991CA2032101A1 Synchronous to asynchronous converter
06/13/1991WO1991009483A1 Anonymous interactive telephone system having direct connect feature
06/12/1991EP0431748A2 Telephony system and method for providing ANI and DNIS
06/12/1991EP0431438A1 Flow control procedure for a broadband integrated services digital telecommunication network, and network to realize the procedure
06/12/1991EP0396589A4 Method and apparatus for automatic loading of a data set in a node of a communication network
06/11/1991US5023904 Direct telephone dial ordering service
06/11/1991US5023863 Optical switching system
06/11/1991US5023606 Programmable logic device with ganged output pins
06/11/1991CA1284845C Communication system using unbalanced communication paths
06/09/1991WO1991009478A1 Optical fibre communications system
06/05/1991EP0430569A1 Fault tolerant interconnection networks
06/05/1991EP0430534A1 Control of non-locally switched telecommunication services
06/05/1991EP0430516A2 A periodic array with a nearly ideal element pattern
06/05/1991EP0429882A2 Low-end high-performance switch subsystem architecture
06/04/1991US5022069 Modular automatic telephone switching system
06/04/1991US5022067 Telephone call security system
06/04/1991US5022026 Method of throughconnecting wideband connections in a digital time switch module between subscribers, and a device for carrying out the method
06/04/1991US5022025 Self-routing switch and its routing method
06/04/1991US5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
06/01/1991CA2004375A1 Statistical measurement equipment and telecommunication system using same
05/1991
05/30/1991WO1991007838A1 Remote access telephone control system
05/29/1991EP0429046A2 Wavelength division switching system with reduced optical components using optical switches
05/29/1991EP0288462B1 Routing of network traffic
05/28/1991US5020099 Private branch exchange
05/23/1991DE3937621A1 Telephone exchange with distributed processor systems - provides multiple plug-in positions to enable connections to bus systems
05/22/1991EP0306520A4 Telephone call monitoring, metering and selection device
05/21/1991US5018195 Fully integrated telecommunication network
05/21/1991US5018194 Electronic switching system having call-forwarding function
05/21/1991US5018131 Optical switch
05/21/1991US5018129 Dual rail dilated switching networks
05/16/1991WO1991007045A1 System for placement of a long distance telephone carrier point-of-presence and call routing
05/15/1991EP0427689A1 A method and apparatus for switching data information through a digital selector
05/15/1991EP0426739A1 Process for the acquisition of data concerning the network in a digital transmission network and such a digital transmission network.
05/15/1991EP0426737A1 Adaptive routing of network traffic.
05/14/1991US5016243 Automatic fault recovery in a packet network
05/14/1991CA1284204C Routing of network traffic
05/11/1991WO1991007857A1 A method and apparatus for switching data information through a digital selector
05/11/1991WO1991007854A1 Generalised connection network
05/08/1991EP0426356A2 Telecommunications network route selection
05/08/1991EP0426355A2 Route based network management
05/08/1991EP0425807A1 One-sided crosspoint switch with distributed control
05/08/1991CN1051278A 异步光通信系统 Asynchronous optical communication system
05/08/1991CN1012608B Telecommunication relay apparatus for telephone exchange system
05/08/1991CN1012607B Subscriber line interface circuit and transformer therefor
05/08/1991CN1012606B Communication switching network and switching element
05/07/1991WO1991007040A1 Automatic fault recovery in a packet network
05/07/1991US5014298 Voice-data telephonic control system
05/07/1991US5014269 Microcomputer integrating a digital subscriber terminal for an integrated service digital network
05/07/1991US5014268 Parallel time slot interchanger matrix and switch block module for use therewith
05/07/1991US5014262 Apparatus and method for detecting and eliminating call looping in a node-by-node routing network
05/07/1991US5014261 System for switching from working units to stand-by units
05/07/1991US5013140 Optical space switch
05/07/1991US5013113 Lossless non-interferometric electro-optic III-V index-guided-wave switches and switching arrays