Patents
Patents for H04Q 3 - Selecting arrangements (38,975)
01/1988
01/19/1988CA1231772A1 Programmable feature card
01/19/1988CA1231771A1 Multi-processing stored program controlled telecommunication establishment
01/14/1988DE3621869A1 Method for signalling transmission between interconnected program-controlled branch exchange communications systems
01/13/1988CN87104377A Isdu d channel handler
01/12/1988US4719617 Communication system
01/12/1988CA1231480A1 Constant current line circuit
01/12/1988CA1231479A1 Communication system having dynamically assigned station set buttons
01/12/1988CA1231477A1 Communication system with operation-procedure guiding function by speech
01/07/1988EP0251924A1 Apparatus for testing a cross-point switching matrix, and matrix comprising such an apparatus
01/07/1988EP0165934B1 Control for a multiprocessing system program process
01/05/1988US4718058 Digital switching network for switching signals of different bit rates
01/05/1988US4718057 Streamlined digital signal processor
12/1987
12/29/1987CA1230949A1 Signal multiplexing circuit
12/23/1987EP0250075A2 ISDN D channel handler
12/23/1987EP0249837A1 Switching device for broad-band signals
12/23/1987EP0249836A1 Switching device for broad-band signals
12/22/1987US4714922 Interconnection networks
12/16/1987EP0248812A1 Method and apparatus for efficient resource allocation.
12/15/1987US4713793 Circuit for CCIS data transfer between a CPU and a plurality of terminal equipment controllers
12/15/1987CA1230434A1 Key telephone system
12/15/1987CA1230401A1 Digital peripheral switchboard for interconnecting subscribers
12/09/1987EP0248190A2 Method and apparatus for enhancing the operating capabilities of a telephone switching system
12/03/1987WO1987007463A1 Method and apparatus for providing variable reliability in a telecommunication switching system
12/02/1987EP0247675A1 Transmitter for ISDN S-bus interface circuit
12/02/1987EP0247118A1 Interface circuit.
12/02/1987CN87101839A Central control unit and working method for exchange system
12/02/1987CN87101838A Operating method of multiprocessor central control unit in high-efficiency fail-safe for exchange system
12/01/1987US4710952 Distributed control type electronic switching system
12/01/1987US4710926 Fault recovery in a distributed processing system
11/1987
11/24/1987US4709388 Subscriber telephone line interface circuit with reduced power stand-by mode
11/24/1987CA1229689A1 Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level
11/18/1987CN86210657U Simple gating device of multiple parallel-terminals on single transmission line
11/17/1987US4707694 Telephone system port communication method and apparatus
11/17/1987CA1229400A1 Telecommunications packet switching system
11/11/1987EP0245077A2 TDMA communication system having common local path medium and local time slot for intraoffice calls
11/11/1987EP0151117B1 Method and apparatus for providing a plurality of special services
11/11/1987EP0150183B1 Method and apparatus for providing call tracing service
11/10/1987US4706280 Electronic step-by-step telephone switching system
11/10/1987US4706240 Switching system having multiple parallel switching networks
11/03/1987US4704724 Routing of network traffic
10/1987
10/27/1987US4703416 Apparatus for locating programs resident on a cartridge of a cartridge programmable communication system
10/27/1987CA1228660A1 High capacity spatial connecting network for digital signals
10/27/1987CA1228659A1 Method for customer definable telephone capability
10/22/1987WO1987006421A1 Telephone exchange with calling telephone identification
10/21/1987EP0241783A2 Digital signal cross-connect system
10/20/1987US4701948 Communication system having separate unidirectional information signalling
10/14/1987EP0241228A2 Multiple access communication system having loop-check circuitry for switching intraoffice connections
10/14/1987EP0240805A2 Current steering cross-point switch matrix
10/14/1987EP0240580A1 Three-stage coupling arrangement
10/13/1987US4700381 Circuit arrangement for centrally-controlled telecommunications exchange systems, comprising central control units and an alternate circuit arrangement
10/13/1987US4700342 Remote repeater in transmission bus system
10/13/1987US4700340 Method and apparatus for providing variable reliability in a telecommunication switching system
10/13/1987US4700020 Method and circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
10/13/1987US4700019 Method and circuit arrangement for the transmission of data signals to a group of control devices belonging to a loop system
10/13/1987US4700018 Method and circuit arrangement for the transmission of data signals between two control devices belonging to a loop system
10/13/1987CA1228146A1 Multimode data communication system
10/13/1987CA1228128A1 Wideband switching matrix network in matrix form
10/07/1987EP0240211A2 Switching network
10/07/1987EP0239908A2 Wideband switching system
10/06/1987US4698841 Methods of establishing and terminating connections in a distributed-control burst switching communications system
10/06/1987CA1227860A1 Controller for a cross-point switching matrix
10/06/1987CA1227859A1 Alternate paths in a self-routing packet switching network
10/06/1987CA1227857A1 Fast circuit switching system
10/01/1987DE3610730A1 Device for a secondary PABX system
09/1987
09/30/1987EP0238841A1 Error-protected multiprocessor controller having a high availability to a switching system, and method for memory configuration operation of this centraller
09/30/1987EP0238834A1 Space-coupling device for broad band signals
09/30/1987EP0238712A1 Controlled commutator matrix
09/30/1987CN87102160A Operation method for altering data processor and device therefor
09/24/1987WO1987005764A1 Telephone dial-up vendor service
09/23/1987EP0238256A2 Automated message chronicling system
09/23/1987EP0238255A2 The personal computer - as an interface between a telephone station set and a business communication system
09/23/1987EP0238039A2 Network event identifiers
09/23/1987EP0237841A1 Method for processing configuration changes of a data processing system and device for carrying out the method
09/22/1987US4696062 Fiber optic switching system and method
09/22/1987US4696059 Reflex optoelectronic switching matrix
09/22/1987US4696028 PBX Intercept and caller interactive attendant bypass system
09/22/1987US4696001 Reconfigurable high-speed integrated local network
09/22/1987US4696000 Nonblocking self-routing packet and circuit switching network
09/22/1987US4695977 Control of real-time systems utilizing a nonprocedural language
09/17/1987DE3607685A1 Circuit arrangement for telecommunications switching systems, in particular telephone PABX systems designed as brokers' systems
09/16/1987EP0237304A2 Optical switch structure
09/16/1987EP0237247A2 Switching system control arrangements
09/16/1987EP0236803A1 Method for the operation of a fault-protected and highly available multiprocessor central controller of a switching system
09/16/1987EP0236796A2 Optical switching system
09/16/1987EP0236780A1 Method for the operation of an error-protected multiprocessor controller having a high availability to a switching system
09/16/1987EP0236779A1 Circuit arrangement for centrally controlled TDM telecommunication exchanges, especially PCM telephone exchanges with connection modules connected to a switching network
09/16/1987EP0105319B1 An optical switch and a time division optical demultiplexer using such switch
09/15/1987US4694487 Controlling multi-fort hunt groups in a distributed control switching system
09/15/1987US4694453 System for adjusting signal transmission timing in time-division multiplexing signal transmission
09/15/1987US4694452 Switching configuration for a telecommunications system in particular a PBX system with subscriber lines, trunk groups, and interface modules
09/15/1987CA1226925A1 Switching system
09/09/1987EP0235529A2 Circuit arrangement for hands-free devices and devices with a receiving amplifier at telephone sets
09/08/1987US4692860 Apparatus for load regulation in computer systems
09/08/1987US4692817 Programmed conversation recording system
09/08/1987CA1226656A1 Dial-operated pbx exchange
09/07/1987EP0125279A4 Acd management information system.
09/02/1987EP0233892A1 A telephone line switch.
08/1987
08/25/1987US4689816 Three relay C. O. trunk interface
08/25/1987US4689815 Controlling multi-port hunt groups in a distributed control switching system
08/25/1987US4689783 Digital satellite exchange