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