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)
09/1985
09/17/1985US4541682 Connector block with solderless, non-screwed and stripping-free terminals having a polytropic air gap for terminating communication cables and dropwire cables
09/17/1985CA1193773A1 Arrangement for and method of detecting multi- frequency sound code signals
09/10/1985US4541088 Tone generation circuit for automatic PCM-TDM telecommunication exchange
09/10/1985US4540857 Circuit testing of telephone grids or the like
09/10/1985US4540854 Subscriber line interface circuit
09/03/1985US4539692 Digital automatic gain control circuit for PCM signals
09/03/1985US4538868 Terminal block
09/03/1985CA1192980A1 Telephone cable entrance terminal with internal fuse link
09/03/1985CA1192970A1 Modular plug connector
08/1985
08/28/1985EP0153125A2 Tone detection apparatus for use in a telephone system
08/27/1985CA1192685A1 Dual tone multifrequency and dial pulse receiver
08/21/1985EP0152258A2 Modular cross-connect panel
08/20/1985US4536614 Supervision and dial pulse detection circuit for a telephone subscriber line
08/20/1985US4536052 Modular cross-connect panel
08/13/1985US4535454 Multifrequency tone distribution using a conferencing arrangement
08/13/1985US4535201 Ground start detection in telephone loop signalling circuit
08/06/1985US4534041 Digital circuit for determining the envelope frequency of PCM encoded call progress tones in a telephone system
08/06/1985US4533793 For telephone systems
07/1985
07/16/1985CA1190680A1 Current sink for dpt channel unit
07/16/1985CA1190678A1 Digital supervisory circuit for a telephone system
07/09/1985US4528695 Distribution system for a local fibre network
07/09/1985US4528664 Call progress signal monitor and method for telephone systems
07/03/1985EP0146938A2 Signal recognition system
06/1985
06/20/1985WO1985002739A1 Transmission control unit for controlling transmission networks
06/19/1985EP0145047A2 Telecommunication line circuit and associated polarity reversal circuit
06/19/1985EP0144794A2 Circuit arrangement to distinguish and evaluate alternating-voltage signals on trunk lines
06/11/1985US4523061 Switching assembly for telephone cables
06/11/1985US4523056 Telephone including resistive array for dialing and system for using such telephone
06/04/1985US4521647 Tone detection system and method
06/04/1985CA1188401A1 Telephone equipment distribution panel stand
05/1985
05/28/1985CA1188015A1 Tone detector and multifrequency receiver using said detector
05/28/1985CA1187929A1 Protective module for telephone logic circuits
05/22/1985EP0142128A1 Circuit arrangement for the drainage of overvoltages
05/15/1985EP0141234A2 Switching network
05/14/1985US4516818 Entrance terminal for telecommunications cables
05/09/1985WO1985002083A1 Interface channel unit
05/08/1985EP0140142A1 Switching network with inverted grouping, especially for telephone switching systems
05/08/1985EP0140014A2 Framework for a weak current installation, especially for distribution frames
05/07/1985CA1186750A1 Adaptive techniques for automatic frequency determination and measurement
05/02/1985EP0139103A2 Overvoltage protection circuit for slic
04/1985
04/24/1985EP0138364A2 Multifrequency tone distribution using a conference arrangement
04/23/1985US4513179 Loop test circuit
04/23/1985US4512622 Conductor guide means for telephone connector blocks
04/11/1985EP0061462A4 Multi-system portable paging device.
04/09/1985US4510601 Digital frequency receiver
04/02/1985CA1185027A2 Digital circuit and method for the detection of call progress tones in telephone systems
04/02/1985CA1185023A1 Tone source for telephone systems
03/1985
03/27/1985EP0134886A2 Circuit arrangement for the transmission of signalling information from a public exchange to subscribers of a telephone exchange, especially a private telephone exchange
03/20/1985EP0134229A1 Borsht/slic auto balancing technique.
03/20/1985EP0134217A1 Activation of a transmission link by code sending.
03/19/1985CA1184281A1 Telephone switching control arrangement
03/12/1985US4504107 Pitch variators for sub-rack connectors
03/06/1985EP0133824A1 Modular connection device for a telephone distribution frame
03/06/1985EP0133760A2 Transmission line control system
02/1985
02/26/1985US4502049 Universal signalling tone receiver
02/19/1985US4500158 Network interface device
02/13/1985EP0031369B1 Dialing interval transmission gating arrangement
02/05/1985US4498171 Tone source for telephone systems
02/05/1985CA1182230A1 Subscriber line interface circuit
01/1985
01/30/1985EP0132327A2 A planar electronic filter element and a connector embodying such a filter
01/23/1985EP0131591A1 Activation in a digital subscriber connection.
01/22/1985US4494815 Self-aligning cover for modular tricoupler
01/16/1985EP0131018A1 Guard tone capture method
01/02/1985EP0035564B1 Binary coincidence detector
01/02/1985CA1180373A Line protector and related termination arrangement
12/1984
12/27/1984CA1180086A Maintenance termination unit
12/11/1984US4488013 Telephone pedestal encapsulating splice housing
12/11/1984US4488011 On-premise telephone test jack
12/11/1984US4488008 Telephone network interface device
12/11/1984CA1179434A1 Switch with several layers of cross points
12/05/1984EP0127349A2 Network interface device
12/04/1984CA1179043A1 Dtmf activated remote telephone line switching and testing
11/1984
11/28/1984EP0126137A1 Apparatus for providing tone signals in terminals for a digital telecommunnication system
11/21/1984EP0125343A2 Distributor having connection contacts without soldering, screwing and stripping, and with a polytropic air gap
11/20/1984US4484035 Dual tone multi frequency digital detector
11/14/1984EP0125012A1 Tone source for telephone systems
11/13/1984CA1177978A1 Call progress signal monitor and method for telephone systems
11/07/1984EP0123905A2 Over-voltage protection device for addition to a distributor
11/06/1984US4481384 Voice recognizing telephone call denial system
11/06/1984CA1177588A1 Digital circuit and method for the detection of call progress tones in telephone systems
11/06/1984CA1177553A1 Wire connector for telecommunications cables
10/1984
10/31/1984EP0123459A1 Loop test circuit
10/30/1984USRE31714 Pre-wired terminal connecting block
10/23/1984US4479229 Arrangement for and method of detecting multi-frequency sound code signals
10/23/1984US4479188 Digital detector for a multi-frequency code in an analog signal
10/23/1984CA1176771A1 Arrangement for extending digital signaling to telephone subscribers' substations
10/10/1984EP0121224A1 Stripless electrical wire terminal for distributors of telecommunication installations, especially telephone installations
10/10/1984EP0121223A1 Distribution strip with a plurality of double terminals for the connection to which the electric wires do not need to be stripped
10/10/1984EP0121221A1 Fanning strip with a plurality of double terminals for the connexion to which the electric wires do not need to be stripped
10/09/1984US4476557 Duplex signaling circuit
09/1984
09/26/1984EP0119678A1 Tone generator
09/04/1984US4470102 Wall mounted distribution frame for telephone subscriber locations
09/04/1984CA1173942A1 Maintenance processing apparatus for remote port units in a telephone switching system
08/1984
08/29/1984EP0116625A1 Multiple simultaneous tone decoder.
08/22/1984EP0116069A1 Bi-vertical main distributing frame connector.
08/21/1984US4467469 Circuitry for recovery of data from certain bit positions of a T1 span
08/21/1984US4467277 Programmable detector for tone signals
08/16/1984WO1984003191A1 Borsht/slic auto balancing technique
07/1984
07/31/1984US4463235 Switch with several layers of crossing points
07/31/1984CA1171945A1 Voice recognizing telephone call denial system
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