Patents
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Patents for H04Q 3 - Selecting arrangements (38,975)
12/1983
12/13/1983CA1158787A1 Service integrated communication transmission and interchange system
12/07/1983EP0095675A2 Circuit for a telephone exchange with line junctors which are individually allocated to connections
12/06/1983US4419753 Network connection system
11/1983
11/29/1983US4418396 Signalling system
11/29/1983CA1157978A1 Loop sensing circuit for use with a subscriber loop interface circuit
11/23/1983EP0094623A1 Circuit for telecommunication exchanges, especially telephone switching exchanges, with multiprocessor systems for call processing purposes
11/22/1983US4417245 Digital space division exchange
11/22/1983US4417244 Automatic path rearrangement for blocking switching matrix
11/22/1983CA1157552A1 Device related to a private exchange
11/15/1983US4415773 Methods of establishing a switching connection within a switching system
11/15/1983CA1157175A1 Power saving line circuit
11/09/1983EP0093670A2 Multi-channel multi-cell optoelectronic switching networks for multi-service telecommunications systems
11/09/1983EP0093523A1 Digital switching network for telecommunications exchange
11/09/1983EP0093205A1 System for transmitting programme or data signals
11/08/1983CA1156748A1 Optical switch for a very large number of channels
11/02/1983EP0093022A1 Apparatus for generating a plurality of electric signals
11/02/1983EP0092820A1 Circuit arrangement for the overvoltage protection of intersection circuits
11/02/1983EP0092807A2 A digital supervisory circuit for a telephone system
11/01/1983US4413338 Communication system for interconnecting a plurality of asynchronous data processing terminals
10/1983
10/26/1983EP0091932A1 Telephone switching control arrangement.
10/25/1983US4412282 Microprocessor control circuit
10/25/1983US4412235 Integrated opto-electronic relay using a semiconductor with persistent photoconductivity and a matrix of such relays
10/25/1983US4412102 Key telephone system
10/18/1983US4410766 Power saving line circuit
10/13/1983WO1983003511A1 Implied principal addressing in a call coverage arrangement
10/13/1983WO1983003506A1 An optical switch and a time division optical demultiplexer using such switch
10/11/1983US4409651 Method and apparatus for inserting instructions in a control sequence in a stored program controlled telecommunications system
09/1983
09/28/1983EP0089683A1 Improvements relating to PCM switching units
09/28/1983EP0089350A1 Electronic terminator circuit
09/27/1983US4406929 Hook status detector for a subscriber loop interface circuit
09/27/1983US4406925 Message delivery system
09/20/1983CA1154185A1 Subscriber line interface circuit
09/20/1983CA1154182A1 Telephone systems
09/20/1983CA1154132A1 Interconnecting apparatus for a distributed switching telephone system
09/14/1983EP0088639A2 Credit card actuated telecommunication access network
09/14/1983EP0088289A2 Method for the reception of a dialling prompting signal from the public telephone network by a telecommunication exchange, especially a private telephone exchange
09/07/1983EP0087784A2 Subscriber line circuit comprising low-resistance shuntable feeding resistors and an indication circuit realising different indications
09/06/1983US4403352 Switching device for optical beams and telephone exchange incorporating such a device
09/06/1983US4403321 Switching network
09/06/1983US4403119 DTMF Activated remote telephone line switching and testing
08/1983
08/31/1983EP0086810A1 Wideband switching architecture
08/30/1983US4402074 Switching network test system
08/30/1983US4402039 Telephone line circuit
08/30/1983US4402008 Wideband switching architecture
08/30/1983US4401861 Semiconductor crosspoint linearizing arrangement
08/30/1983US4401856 Control system for handling direct inward dialed telephone calls
08/30/1983CA1153137A1 Parallel operation of telephone equipment on a digital loop
08/30/1983CA1153120A1 Multiprocessor information processing system having fault detection function based on periodic supervision of updated fault supervising codes
08/30/1983CA1153090A1 Connection network control system
08/24/1983EP0086634A1 Memory circuitry for use in a digital time division switching system
08/24/1983EP0086519A2 A binary selector stage and a selector and selector system comprising such selector stages
08/24/1983EP0086518A2 A binary switching element and a selector stage, a selector and selector system comprising binary switching elements
08/24/1983EP0086434A1 Switching network
08/23/1983US4400627 Telephone switching network
08/18/1983WO1983002864A1 A method and apparatus for giving identity to, and selecting one of a plurality of function units
08/16/1983US4399439 Signal switching matrix
08/16/1983CA1152241A1 Telephone loop resistance detector
08/16/1983CA1152221A1 Peripheral unit controller
08/10/1983EP0085633A1 Optoelectronic switching network
08/10/1983EP0085558A2 Supervision of automatic switching systems
08/10/1983EP0085226A2 Switching network for use in a time division multiplex system
08/09/1983US4398285 Time-division multiplex switching network
08/09/1983US4398284 Concentrator in a subscriber loop digital carrier system
08/09/1983US4398065 Circuit arrangement for determining the zone of origin of a telephone connection
08/09/1983US4398064 Call-for-service and continuity sensor circuit
08/03/1983EP0084883A1 Data transmission network
08/02/1983US4397016 Process for switching time-multiplexed signals transmitted on a carrier, including in particular an optical carrier, and a device embodying this process
08/02/1983CA1151325A1 Multiple data rate digital switch for a tdma communications controller
07/1983
07/26/1983CA1150805A1 Time division switching system control arrangement
07/26/1983CA1150804A1 Control circuit for a telephone system for the control of visual and audible signals
07/19/1983US4394541 Three stage minimum configuration conditionally non-blocking matrix
07/13/1983EP0083520A1 Optical beam switching device and telephone exchange including the same
07/12/1983US4393381 Transfer bus matrix
07/12/1983CA1149917A1 Network connection system
07/12/1983CA1149916A1 Method of providing person locator service
07/07/1983WO1983002379A1 Digital loop transceiver for interfacing a digital pabx to a digital subscriber set via a subscriber line
07/05/1983US4392224 Speech path switching system in time-divisional electronic telephone switching system
07/05/1983US4392221 Time division multiplex module for use in digital switching network
07/05/1983US4392129 Multiplexed liquid crystal display
07/05/1983US4392024 Electronic key telephone set circuit for permitting dialing during failure of commercial power supplied to the set
07/05/1983CA1149494A1 Telephone-switching system and novel public telephone instrument
06/1983
06/28/1983US4390790 Solid state optically coupled electrical power switch
06/28/1983CA1149089A1 Call waiting signal arrangement
06/23/1983WO1983002209A1 Apparatus for loading memories in a telecommunication exchange
06/21/1983US4389547 Telephone set
06/21/1983CA1148676A1 On-hook/off-hook status check circuit
06/14/1983US4388715 Alarm preprocessor logic
06/14/1983US4388499 Line interruption circuit for use in a telephone set
06/14/1983CA1148240A1 Telephone exchange systems utilizing telephone sets
06/08/1983EP0080681A2 Control arrangement for controlling a light switch for optical signals
05/1983
05/31/1983US4386425 Switching unit for the transfer of digitized signals in PCM system
05/25/1983EP0079463A1 Method and circuit for registering the loop current criteria in a telecommunication exchange
05/11/1983EP0078355A1 Line circuit containing impedance adaptation means
05/10/1983US4383137 Key telephone system with multiple processor control
05/10/1983CA1146245A1 Keyless and indicatorless local telephone switching system
05/03/1983US4382294 Telephone switching control arrangement
05/03/1983US4381881 Fiber optic crossbar switch for automatically patching optical signals
04/1983
04/28/1983WO1983001549A1 Telephone switching control arrangement
04/26/1983CA1145443A1 Sampled port data switching system employing interactive processors
04/26/1983CA1145442A1 Arrangement of interactive telephone switching processors providing selective functional capability by port
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