Patents
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Patents for H04Q 3 - Selecting arrangements (38,975)
01/1990
01/09/1990US4893309 Digital interface between at least two subscriber line interface circuits and a processing unit
01/09/1990CA1264358A1 Monolithic switch with selective latch control
01/03/1990EP0349079A2 Ciruit arrangement for the transmission of information
12/1989
12/28/1989WO1989012944A1 Wide band communication system
12/27/1989EP0348327A2 Method of derermining an optimal end node to end node route through a data communications network
12/27/1989EP0348025A1 Line interface unit
12/26/1989US4890315 Cellular remote station with multiple coupled units
12/20/1989EP0346568A2 Method for mutual data communication between a communication exchange and a staff presence detection installation
12/13/1989EP0346164A1 Routing method for a packet switching network
12/13/1989EP0345623A2 Switching device for broad-band signals
12/13/1989CN1038006A Packet switches, switching methods, protocols and network
12/12/1989US4887259 Communication network having multi-conjunction architecture
12/12/1989US4887079 Rearrangeable multiconnection switching networks constructed using combinatorial designs
12/05/1989US4885780 Method for call routing in a network
12/05/1989CA1263729A1 Delta network of a cross-point switch
11/1989
11/30/1989WO1989011768A1 Class marking apparatus for use in telephone exchanges
11/30/1989DE3816948A1 Circuit arrangement for telecommunications switching installations and/or telephone exchanges, especially cross-connect switching stations, with a Closs switching network
11/29/1989EP0343160A1 Automatic speech recognition to select among call destinations.
11/23/1989EP0342667A2 Automatic call distribution system
11/23/1989EP0342314A2 Anonymous interactive telephone system with expanded outward calling features
11/23/1989EP0342295A2 Interactive call-handling
11/21/1989US4882699 Communications network routing and management system
11/15/1989EP0341800A2 Electronic audio communication system with user controlled message address
11/15/1989CN1037248A Call traffic control
11/14/1989US4881261 Method for predictive pacing of calls in a calling system
11/14/1989US4881226 Digital interface of an integrated subscriber line interface circuit
11/08/1989EP0340665A2 Exchange system having originating call restriction function
11/08/1989EP0340225A1 Switching networks.
11/07/1989US4879551 Switching array with concurrent marking capability
11/02/1989EP0339838A2 Control memory using recirculating shift registers
11/02/1989EP0339719A1 Switching matrix for telecommunication exchanges
11/02/1989EP0339469A2 Method for the utilisation of a telephone exchange with a central signalization channel for the casting of votes
11/02/1989EP0339432A2 Method for a calculator-controlled switching device, especially for a key-telephone exchange, in which data and telephone terminals are connectible alternatively
11/02/1989EP0339127A2 Apparatus and method for providing existing telephone switching equipment with the capability of using the SS7 protocol
10/1989
10/31/1989US4878240 Multi-service telephone switching system
10/31/1989US4878239 Anonymous interactive telephone system with expanded outward calling features
10/31/1989US4878215 Signal switching system
10/31/1989US4878048 Channel redundancy in a digital loop carrier system
10/25/1989EP0338640A2 Meshed telecommunication network
10/25/1989CN2046694U Pin二极管宽带开关 Pin diode switch broadband
10/24/1989US4876717 Adjunct processor for providing computer facility access protection via call transfer
10/24/1989US4876711 Series connected telephone service system
10/24/1989CA1262484A1 Telephone system adapted to telemarketing
10/18/1989EP0337163A2 Circuit arrangement for switching-over from normal operation to emergency operation and reversely in a telephone switching device
10/11/1989EP0336524A2 Electronic audio communication system with user controlled message address
10/11/1989EP0336373A2 Cell switching system of asynchronous transfer mode
10/11/1989EP0336302A1 One-sided multistage switching network
10/11/1989EP0336301A1 One-sided switching network
10/11/1989EP0336300A1 Multi-module switching network
10/10/1989US4873719 Enhanced calling number delivery service system
10/10/1989US4873718 Feature telephone integration device
10/10/1989US4873716 Path allocation arrangement for multi-terminal groups
10/10/1989US4873682 Digital key telephone system
10/10/1989US4873663 Control memory using recirculating shift registers for a TDM switching apparatus
10/10/1989US4873521 Address administration unit of a multi-processor central control unit of a communications switching system
10/10/1989US4873517 Method for selecting least weight end node to end node route in a data communications network
10/10/1989CA1262274A1 Isdn d channel handler
10/10/1989CA1262272A1 Automated message chronicling system
10/10/1989CA1262260A1 Broadband optical distribution system
10/05/1989WO1989009525A1 Call traffic control
10/05/1989WO1989009521A1 Communication switching element
10/04/1989EP0334954A1 Layered network
09/1989
09/27/1989EP0334612A1 Call traffic control
09/27/1989EP0333922A1 Blocking-free three-stage switching network
09/27/1989EP0333918A2 Telephone equipment, particularly private branch exchange
09/26/1989US4870680 Communication apparatus having a communication hold function
09/26/1989US4870637 Optical backplane
09/26/1989CA1261922A1 Circuit for detecting current variations
09/26/1989CA1261495A1 Line terminating apparatus
09/26/1989CA1261442A1 Nonblocking switching system and method
09/26/1989CA1260590A1 Architecture for distributed control telecommunication switching systems
09/26/1989CA1260589A1 Communication system having automatic circuit board initialization capability
09/26/1989CA1260582A1 Terminal based adjunct call manager for a communication system
09/26/1989CA1260573A1 Low power line driving digital transmission system
09/26/1989CA1260535A1 Voltage surge arrester circuits
09/26/1989CA1260171A1 Protection arrangement for a telephone subscriber line interface circuit
09/26/1989CA1260124A1 Subscriber's line switching control system
09/19/1989US4868812 Shared lines equipment, especially for B-ISDN switching system
09/19/1989US4867519 N by N type optical diffuser and coupling network
09/13/1989EP0332345A2 Codecs with suppression of multiple encoding/decodings across a connection
09/13/1989EP0331838A2 Digital key telephone system
09/12/1989US4866767 Subscriber line interface circuit
09/12/1989US4866763 Interexchange carrier automatic route selection system
09/12/1989US4866758 Phone management server for use with a personal computer LAN
09/12/1989US4866432 Field programmable matrix circuit for EEPROM logic cells
09/06/1989CN1035405A Line interface circuit
09/05/1989US4864623 Method of recognizing a control command in a system, and interactive system for carrying out the method
09/05/1989US4864600 Telephone call processing system
09/05/1989US4864598 Loop status verification system
09/05/1989US4864559 Method of multicast message distribution
08/1989
08/30/1989EP0330441A2 Interface to and operation of a voice messaging system
08/29/1989US4862496 Routing of network traffic
08/29/1989US4862492 Measurement of transmission quality of a telephone channel
08/29/1989US4862452 Digital signal processing system
08/29/1989US4862161 Three-stage coupling arrangement
08/24/1989DE3826243A1 Centrally controlled information system, including the terminal used therefor
08/23/1989EP0329420A2 Memory addressing system
08/23/1989EP0329082A2 Self-routing switch and its routing method
08/23/1989EP0328854A1 NxN interconnection networks formed of delta networks and method for the establishment of inlet-outlet permutations
08/23/1989EP0158673B1 Plural communication channel protocol support systems
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