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)
05/1990
05/23/1990EP0369193A2 Collision crossbar switch
05/23/1990EP0369116A2 TDM switching matrix controller
05/23/1990EP0191036B1 Database backup method
05/23/1990EP0190198B1 Time division switching system control arrangement and method
05/22/1990CA1269437A1 Circuit arrangement for pcm telecommunication facilities
05/18/1990CA2003121A1 Universal micro circuit for telecommunication applications
05/16/1990EP0368501A1 Cross-connecting system
05/16/1990EP0368123A1 Synchronisation arrangement for a digital PBX linked to an ISDN network
05/16/1990CN1042286A Time division switch
05/16/1990CN1008049B Security arrangement for telecommunications exchange system
05/16/1990CN1008048B Network for message switching between plurality of processing units
05/16/1990CN1008041B Alternating communication channel switchover system
05/15/1990US4926420 Transmission system of a packet signal in an integrated network system using a frame format flexible for various forms of the integrated network system
05/15/1990US4926416 Method and facilities for hybrid packet switching
05/15/1990US4926363 Modular test structure for single chip digital exchange controller
05/15/1990CA1269178A1 Automatic refresh of operating parameters in equipment with volatile storage
05/15/1990CA1269158A1 Combined circuit and packet switching system
05/09/1990EP0367452A2 A photonic switch architecture utilizing code and wavelength multiplexing
05/09/1990EP0366788A1 D channel monitor
05/08/1990US4924480 Codecs with suppression of multiple encoding/decodings across a connection
05/08/1990US4924464 Technique for converting either way between a plurality of N synchronized serial bit streams and a parallel TDM format
05/08/1990US4924460 Office control unit apparatus for use in a digital network
05/08/1990US4924458 Multiplex communication system
05/08/1990US4923265 Light triggering switch
05/03/1990WO1990004907A1 Communication device between a digital network and a telematic equipment
05/03/1990DE3836460A1 Circuit arrangement for a telecommunication branch exchange
05/03/1990CA2002111A1 Synchronisation arrangement for an isdn-connected private digital automatic switching equipment
05/02/1990EP0366263A2 Time division switch
05/02/1990EP0365905A2 Process for controlling centrally controlled communication exchanges
05/02/1990EP0365693A1 Method and circuit arrangement for the transmission of information signals in a broadband communication network
05/02/1990CN1041857A Point-to-multipoint communication method with exchange function
05/01/1990US4922490 Telephone station set
05/01/1990US4922489 Circuit configuration for routine testing of the clock supply of a large number of units operated with the same clock
05/01/1990US4922484 ISDN remote switching unit for accommodating analog and digital lines
05/01/1990US4922482 Apparatus and method for creating a data bus access contest
05/01/1990US4922479 Optical time slot interchanger using one-bit memory cells
05/01/1990CA2001858A1 Replacement switch
05/01/1990CA1268551A1 Program update in duplicated switching systems
05/01/1990CA1268532A1 Method and apparatus for providing variable reliability in a telecommunication switching system
05/01/1990CA1268531A1 Control data transmission system for private branch exchange
05/01/1990CA1268530A1 Expandable digital switching matrix with fault- tolerance and minimum delay time
05/01/1990CA1268361A1 Fiber-optic distribution system for broadband signals
04/1990
04/30/1990CA2001100A1 Transmission networks
04/26/1990DE3835963A1 ISDN system with 64-kbit/s channels
04/25/1990EP0365200A2 Telecommunication system with subscriber controlled feature modification
04/25/1990CN1041680A Digital switched telecommunications system
04/25/1990CN1007775B Pabx-networking
04/24/1990CA1268272A1 Access circuit diagnostics for integrated services digital network
04/19/1990WO1990004298A1 Integrated telecommunication system with improved digital voice response
04/18/1990EP0363631A1 Circuit arrangement for telecommunication exchanges, especially PCM time division telephone exchanges, with distributed switching networks connected to a central switching network
04/18/1990EP0363499A1 Method and circuit arrangement for the transmission of voice signals in a broadband communication network
04/18/1990CN1041497A Automatic telecommunications systems
04/17/1990US4918597 Adaptive interface for transferring segmented message between device and microcomputer on line division multiplexed bus
04/17/1990CA1267962A1 Switching arrangement for communication of digital signals, in particular pcm signals
04/17/1990CA1267960A1 Multiple access communication system having loop- check circuitry for switching intraoffice connections
04/11/1990CN1007573B Method of secured communications in telecommunications system
04/10/1990US4916692 TDM bus controller
04/10/1990CA1267711A1 Switching network
04/05/1990WO1990003707A1 Process for measuring in the user domain of an integrated services digital network (isdn) system
04/04/1990EP0361822A2 Automatic telecommunications system
04/04/1990EP0361808A2 Modular test structure for single chip digital exchange controller
04/04/1990EP0361760A2 ISDN, basic rate interface arranged for quad voice
04/04/1990EP0360924A1 Method for operating pulse-controlled time division telecommunication exchanges, especially PCM telephone exchanges, with distributed switching networks connected to a central switching network
04/03/1990US4914650 Bandwidth allocation and congestion control scheme for an integrated voice and data network
04/03/1990US4914429 Switch components and multiple data rate non-blocking switch network utilizing the same
03/1990
03/29/1990DE3832491A1 Verfahren zum messen im teilnehmerbereich eines integrated services digital network (isdn)-systems A method for measuring the subscriber base of an integrated services digital network (isdn) system
03/28/1990EP0360723A2 Method of enhancing communication setup between a commmunication station and a telecommunications network
03/28/1990EP0360065A1 Method for operating telecommunication exchanges, especially PCM time division telephone exchanges, with distributed switching networks connected to a central switching network
03/28/1990EP0359757A1 Automated interactive mass communications system
03/28/1990CN1007403B Switching arrangement for communication of digital signals, in particular pcm signals
03/27/1990US4912706 Frame synchronization in a network of time multiplexed optical space switches
03/27/1990US4912705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/27/1990US4912704 Digital interface device for PCM data, in particular for digital telephone, data processing or image processing systems
03/27/1990US4912701 Packet switching module
03/27/1990US4912700 Telecommunications digital switch
03/27/1990US4912452 ISDN quick connect terminating resistor
03/27/1990CA1267233A1 Method and circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
03/27/1990CA1267208A1 Message signaling arrangement between a switching system and user terminals
03/22/1990DE3832092A1 Digital PBX with a number of communication terminals exhibiting key functions and equipped with line-seizing function keys
03/21/1990EP0359352A2 Telecommunications transmission security arrangement
03/21/1990EP0198010B1 Packet switched multiport memory nxm switch node and processing method
03/21/1990CN1007315B Communication system with remote-controlled signal receiving apparatus
03/20/1990US4910731 Switching system and method of construction thereof
03/20/1990US4910729 ISDN traffic generator adapter
03/20/1990CA1266920A1 Method and circuit arrangement for the transmission of data signals between two control devices belonging to a loop system
03/20/1990CA1266906A1 Combined circuit switch and packet switching system
03/15/1990DE3924974A1 Telephone exchange for integrated service digital network
03/14/1990EP0358597A2 Telephone exchange
03/14/1990CN1040468A Telecommunications transmission security arrangement
03/13/1990US4908824 Communications system comprising a ring-shaped network which is provided so as to provide a communications network in the subscriber line region of a digital switching equipment
03/13/1990CA1266727A1 Apparatus and method for tdm data switching
03/08/1990DE3829206A1 Method for controlling communication switching systems, particularly telephone branch exchanges
03/07/1990EP0357483A1 Switching matrix
03/07/1990EP0357427A2 Communication terminal device
03/07/1990EP0356568A1 Method and apparatus for speaker recognition in a telephone exchange
03/07/1990EP0356567A1 Method and apparatus for speaker recognition in a telephone exchange
03/07/1990CN1007117B Extended equipment for communication system
03/06/1990US4907259 Call appearance reservation arrangement
03/06/1990US4907225 Data protocol controller
03/06/1990US4906064 Switch for selectively switching optical wavelengths
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