Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 1 - Details of selecting apparatus or arrangements
Patents for H04Q 1 - Details of selecting apparatus or arrangements (11,745)
09/1986
09/10/1986EP0193537A1 Microcomputer controlled locking system.
09/09/1986US4611325 DTMF receiver sense and control arrangement
09/03/1986EP0193244A2 Polarity reversal circuit
09/02/1986US4609781 BORSHT/SLIC auto balancing technique
09/02/1986CA1210871A1 Guard tone capture method
09/02/1986CA1210839A1 Centralized supervisory system
08/1986
08/20/1986EP0191526A2 Evaluating circuit for alternating currents or voltages
08/20/1986EP0108117B1 Dual tone multifrequency and dial pulse receiver
08/19/1986US4607135 Cable distribution head with LSA-PLUS termination technique
08/14/1986WO1986004762A1 Supervisory audio tone detection in a radio channel
08/12/1986US4605928 Fault-tolerant array of cross-point switching matrices
08/12/1986US4605275 Modular encapsulated cross-connect terminal unit
08/12/1986CA1209666A1 Tone receiver for digital data communication systems
08/05/1986US4604755 Feed forward dual channel automatic level control for dual tone multi-frequency receivers
08/05/1986US4604713 Tone detector and multifrequency receiver using said detector
07/1986
07/29/1986US4603377 Main distributing frame board for an electronic switching system
07/22/1986US4602131 Touch tone decoder
07/08/1986US4599700 Process and device for digital frequency generation
07/08/1986US4599495 Apparatus for multifrequency signalling tone detection
07/02/1986EP0186579A1 Distribution frame for optical cables
06/1986
06/25/1986EP0185295A2 A call progress monitor for a computer telephone interface
06/24/1986US4596983 Module for printed assemblies in a telecommunication system an apparatus for automatically putting the means on printed board assemblies newly inserted into the module into operation
06/24/1986US4596439 Sheet metal terminal
06/24/1986CA1206644A1 Apparatus for isolating the voice frequency path from the floating battery feed during signalling
06/24/1986CA1206643A1 Supervision and dial pulse detection circuit for a telephone subscriber line
06/18/1986EP0184984A1 Evaluating device for a pulsating tone signal
06/18/1986EP0184883A2 Traffic simulation device for testing switching exchanges, taking into account the subscriber system interaction
06/17/1986US4595799 Modularized 66-block
06/17/1986CA1206283A1 Subscriber telephone system
06/17/1986CA1206247A1 Terminal block
06/03/1986US4593156 For a subscriber line interface circuit having a tip lead
06/03/1986CA1205530A1 Duplex signaling circuit
05/1986
05/27/1986US4592051 In a telecommunication system
05/20/1986US4590595 Apparatus for detecting in-band single frequency signaling tones from FDM channels
05/20/1986US4590432 Constant-percent break pulse corrector
05/14/1986EP0091932B1 Telephone switching control arrangement
05/13/1986US4588238 Telephone network interface connector
05/09/1986WO1986002795A1 Interswitch line circuit
05/07/1986EP0180000A2 Cut-over apparatus comprising a plurality of terminals for the stripless connection of electrical conductors
05/07/1986EP0179812A1 Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level.
05/06/1986CA1204239A1 Borsht/slic auto balancing technique
04/1986
04/30/1986EP0179750A2 Modular distribution frame
04/29/1986US4585905 Overvoltage protection circuit for SLIC
04/16/1986EP0178082A2 Digital correlator circuit
04/15/1986US4583215 Telephone line access system for main distribution frame
04/15/1986US4582960 Subscriber network interface device
04/08/1986US4581489 Modular connection system for a telephone distribution frame
03/1986
03/11/1986US4575840 Telephone line access device for main distribution frame
03/11/1986US4575839 Centralized supervisory system
03/04/1986US4574376 Activation of a transmission link by code sending
02/1986
02/27/1986WO1986001360A1 Microcomputer controlled locking system
02/25/1986CA1201229A1 Ground start detection in telephone loop signalling circuit
02/25/1986CA1201195A1 Bi-vertical main distributing frame connection
02/19/1986EP0171678A1 Device for the production of a multifrequency signal
02/18/1986US4571723 Pulse code modulated digital telephony tone generator
02/18/1986CA1200939A1 Single frequency detection circuit
02/11/1986US4570260 Digital tone signal generator for telephony system
02/11/1986US4570235 Digital receiver of multifrequency signals with frequency recognition device
02/04/1986CA1200333A1 Activation of a transmission link by code sending
02/04/1986CA1200332A1 Activation in a digital subscriber connection
02/04/1986CA1200316A1 Multiple simultaneous tone decoder
01/1986
01/29/1986EP0036009B1 Terminal apparatus for telecommunications lines
01/28/1986US4567328 Energy detection circuit for a facsimile system controller
01/28/1986CA1200031A1 Adaptive signal receiving method and apparatus
01/22/1986EP0041536B1 Programmable multifrequency tone receiver
01/08/1986EP0166810A2 Method and apparatus for the generation of dialing tones
01/08/1986EP0166738A1 Transmission control unit for controlling transmission networks
01/07/1986US4563681 Tone receiver for digital data communication systems
01/07/1986US4563548 Method and circuit for telephone dialing signal generation
01/07/1986US4563053 Pole mounted cross-connect terminal
01/02/1986EP0166318A2 Device for the recognition and translation of dial information and also of control information for services of a telephone exchange
12/1985
12/31/1985US4562311 Telephone network interface device
12/31/1985CA1198803A1 Equipment cabinet
12/27/1985EP0165335A1 Connector bank with solderless, non-screwed and stripless connecting elements with a polytropic air gap for the connection of cable wires and overhead cables (dropwire cables)
12/24/1985US4560839 Telephone junction box
12/17/1985CA1198184A1 Planar electronic filter element and a connector embodying such a filter
12/04/1985EP0163288A1 Method for testing switched connexions of a multiplex space division switching network
12/04/1985EP0163210A2 A method and apparatus for controlling signal level gain for dual tone multi-frequency receivers
12/03/1985CA1197639A1 Loop test circuit
11/1985
11/27/1985EP0162634A2 Energy detection circuit for a facsimile system controller
11/27/1985EP0162270A1 Method for testing switched connexions of a multiplex space division switching network
11/26/1985US4555593 In an electronic circuit
11/21/1985EP0161755A2 Telephone distribution frame connector assembly
11/21/1985EP0161253A1 Interface channel unit.
11/19/1985US4554609 For television circuits
11/19/1985US4554542 Guard tone capture method
11/19/1985US4554416 Low voltage two wire to four wire telephone circuit converter apparatus
11/12/1985US4552994 Apparatus for isolating the voice frequency path from the floating battery feed during signalling
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
10/1985
10/29/1985US4550225 AC Signal-activated switching apparatus
10/22/1985US4548448 Bridging connector assembly and method of using same
10/16/1985EP0158538A2 Method and circuit for generating a time varying signal
10/09/1985EP0157536A2 Telephone line access system for main distribution frame
10/08/1985US4546490 Single frequency detection circuit
10/08/1985CA1194939A1 Multifrequency receiver
10/01/1985CA1194567A1 Connection unit for telecommunication lines
09/1985
09/24/1985CA1194245A1 Multi-tone signal generator
09/24/1985CA1194199A1 Entrance terminal for telecommunications cables
09/24/1985CA1194192A1 Circuitry for recovery of data from certain bit positions of a t1 span
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