Patents
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Patents for H04Q 3 - Selecting arrangements (38,975)
02/1986
02/18/1986CA1200929A1 Time-switch circuit
02/12/1986EP0171231A2 A rearrangeable full availability multistage switching network with redundant conductors
02/12/1986EP0171066A2 Method and circuit for addressing signal input/output devices from a central processing device
02/12/1986EP0170799A1 Switching systems
02/04/1986US4569040 Electronic switching system having a time division multiplex switch controller address by central control unit
02/04/1986US4568143 Optical fiber crossover switching apparatus
01/1986
01/29/1986EP0169757A1 Method of determining the last intermediate node in a network of several interconnected nodes
01/29/1986EP0169706A2 Electronic battery feed circuit for telephone systems
01/29/1986EP0169696A2 Battery feed system
01/29/1986EP0169551A2 Circuit arrangement for telecommunication exchanges, in particular for telephone exchanges, with information processing networks and traffic measuring devices
01/29/1986EP0169324A1 Switching protocol with retry
01/29/1986EP0169208A1 Self-routing packet switching network.
01/28/1986US4567323 For use with a telephone system
01/22/1986EP0169160A2 Programmable feature card
01/22/1986EP0168631A1 Optoelectronic selector
01/21/1986US4566007 Rearrangeable multiconnection switching networks
01/21/1986US4565903 Telephone interexchange carrier selection
01/15/1986EP0168039A2 Circuit arrangement for connecting a voice-controlled auxiliary device assigned to a telephone set to a telephone line
01/15/1986EP0167951A1 Method for path finding in a meshed telecommunication network
01/15/1986EP0167520A1 Duplicated time division switching system
01/14/1986US4564936 Time division switching network
01/14/1986US4564726 Pulse/direct current transmitting circuit in a key telephone system
01/14/1986US4564725 Telecommunications system, particularly a telephone exchange system, having overload protected sequential logic systems
01/14/1986US4564724 Terminal interface connecting terminal unit having central office line interface to key telephone system
01/08/1986EP0167351A2 Signal multiplexing circuit
01/07/1986US4563547 Loop-start/ground-start line interface circuit
01/07/1986CA1199074A1 Communications network with optical channels
01/02/1986EP0166318A2 Device for the recognition and translation of dial information and also of control information for services of a telephone exchange
01/02/1986EP0166101A1 Circuit arrangement for telecommunication exchanges, especially telephone exchanges, with information processing apparatuses and traffic measuring devices
12/1985
12/31/1985US4562308 Subscriber connection circuit comprising feed resistors which can be bridged in low-ohmic fashion and an indication circuit which effects different indications
12/27/1985EP0165499A1 Space division multiplex switching network
12/27/1985EP0165462A1 Digital switch module
12/27/1985EP0165363A1 Detection circuit for current varations
12/24/1985US4560837 Call transfer method and circuitry
12/24/1985US4560833 Method and apparatus for signaling an existing telephone communication between picture telephone apparatuses
12/18/1985EP0164611A2 Switching system and method for network having a plurality of terminal control equipment units
12/18/1985EP0164578A2 Storage method for grouped communications switching data
12/18/1985EP0164495A2 Duplex cross-point switch
12/18/1985EP0164406A1 Fast circuit switching system.
12/18/1985EP0164362A1 Method for customer definable telephone capability.
12/17/1985US4559417 Method of setting operating data in a key telephone system
12/17/1985CA1198234A1 Method of and a circuit arrangement for determining current criteria in the lines of a telephone system
12/17/1985CA1198166A1 Spacial optical switching assembly
12/11/1985EP0164244A2 Local area networks
12/11/1985EP0164015A1 Circuit arrangement for centrally controlled telecommunication exchanges, especially telephone exchanges, with two common control units operating in parallel and a replacement circuit in case of failure
12/10/1985US4558185 Subscriber line interface circuit with complex impedance
12/04/1985EP0163103A1 Circuit arrangement for telecommunication exchanges, especially telephone exchanges with counting devices for registering service requests
12/03/1985US4556971 Apparatus for loading memories in a telecommunication exchange
12/03/1985CA1197641A1 Telephone line interface circuit
11/1985
11/26/1985US4555594 Telephone interexchange signaling protocol
11/21/1985WO1985005241A1 Digital timeslot and signaling bus in a digital pbx switch
11/21/1985EP0161683A2 Optical switch circuit
11/21/1985EP0161253A1 Interface channel unit.
11/19/1985US4554412 Battery feed system for supplying power to communication circuits
11/13/1985EP0161162A1 Automatic exchange with a video switching matrix
11/13/1985EP0161031A1 Telecommunication system, in particular telephone system
11/13/1985EP0161030A1 Method and a device for controlling a dataprocessing system
11/13/1985EP0160826A1 Space connection network for high bit rate digital signals
11/07/1985WO1985005003A1 Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level
11/05/1985US4551670 Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level
11/05/1985US4551583 Control signal transmission system for key telephone system
11/05/1985US4551582 Circuit for automatically releasing holding state of telephone system
11/05/1985CA1196383A1 Optoelectronic spatial switching device
10/1985
10/29/1985US4550398 Modular self-routing PCM switching network for distributed-control telephone exchange
10/29/1985US4550397 Alternate paths in a self-routing packet switching network
10/23/1985EP0159227A1 Optical selector
10/23/1985EP0159226A1 Optical switch
10/22/1985US4549313 Supervisory device for an optoelectronic switching network
10/22/1985CA1195760A1 Modular structure of pcm-switched distributed control and distributed-diagnostic network
10/16/1985EP0158290A2 A wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
10/10/1985WO1985004544A1 Arrangement for transferring digital data
10/09/1985EP0157474A2 Keyboard security for a telephone attendant set
10/08/1985US4546475 For a two-way plural channel communication system
10/08/1985CA1195019A1 Additional line coupling circuit to an intercom telephone set
10/08/1985CA1195018A1 Line circuit
10/08/1985CA1194967A1 Electronic subscriber junctor
10/02/1985EP0026187B1 Communication system tracking arrangement
10/01/1985US4545078 Method and arrangement for controlling a light switch for optical signals
10/01/1985US4545051 Switching unit for the transfer of digitized signals in PCM system
10/01/1985CA1194607A1 Method and apparatus for giving identity to and selecting one of a plurality of function units
09/1985
09/24/1985US4543663 Communications exchange
09/24/1985US4543662 Optical beam switching device and telephone exchange comprising a device of this kind
09/24/1985US4543653 Modular self-routing PCM switching network for distributed-control telephone exchange
09/24/1985US4543651 Duplicated time division switching system
09/24/1985CA1194190A1 Common channel interoffice signaling system
09/24/1985CA1194189A1 Remote data link switching arrangement
09/18/1985EP0155030A2 Priority arrangement used in a telecommunication switching system
09/18/1985EP0155025A1 Digital switching network for switching signals of different bit rates
09/12/1985WO1985004067A1 Telephone system port communication method and apparatus
09/11/1985EP0154493A2 Operator station for telephone exchange
09/11/1985EP0154371A2 Telecommunication switching system
09/10/1985US4540852 Electronic subscriber junctor
09/03/1985US4539564 Electronically controlled interconnection system
09/03/1985US4539436 Programmed conversation recording system
08/1985
08/29/1985WO1985003828A1 Communication system having dynamically assigned station set buttons
08/28/1985EP0153140A1 Communication system having dynamically assigned station set buttons
08/27/1985US4538032 Interface circuit with impedance adaptation means
08/27/1985US4538031 Service circuit for a local telephone line
08/27/1985CA1192646A1 Piezoelectric apparatus for positioning optical fibers
08/21/1985EP0101449B1 A method and apparatus for giving identity to, and selecting one of a plurality of function units
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