| Patents for H04Q 1 - Details of selecting apparatus or arrangements (11,745) |
|---|
| 04/12/1988 | US4737951 Exchange with error correction |
| 04/12/1988 | US4737720 DTMF generation using pre-summed tables |
| 04/06/1988 | EP0262325A2 Device for a distribution frame |
| 04/05/1988 | US4736406 Expansion subsystem for use in a communication system |
| 03/30/1988 | EP0261332A2 Distributing frame for telecommunications circuit |
| 03/30/1988 | EP0161253B1 Interface channel unit |
| 03/29/1988 | US4734061 Telecommunications terminal block |
| 03/24/1988 | DE3631168A1 Method for exchanging input and output procedures between external subscriber installation and a switching system with V24 interface |
| 03/15/1988 | US4731827 Interswitch line circuit |
| 03/15/1988 | US4731809 Indoor telephone network interface device |
| 03/15/1988 | CA1234209A1 Telephone line access system for main distribution frame |
| 03/09/1988 | EP0258629A2 Module for protecting electrical lines in telecommunication installations |
| 03/09/1988 | EP0258628A2 Module for protecting electrical lines in distributing devices for telecommunication installations |
| 03/08/1988 | CA1233925A1 Digital loudspeaking telephone |
| 03/03/1988 | DE3628643A1 Method for transmitting signals between subscriber terminals of a party line and subscriber terminals of a dialling system (DTMF/pulse signalling) |
| 03/01/1988 | US4729064 Modular interconnect block with protector structure |
| 03/01/1988 | US4729059 Telephone connection box |
| 02/25/1988 | DE3628347A1 Simulation of a band-pass filter for frequencies above the voice band which are used for generating signals in telephone engineering |
| 02/24/1988 | CN87104107A Non-powered remote sensor |
| 02/23/1988 | US4727570 Waveform generators |
| 02/18/1988 | DE3726776A1 Telefonverbinderblock vom laminaren typ Phone connector block from laminar type |
| 02/11/1988 | DE3625422A1 Stacked component for distribution frames of telecommunication systems |
| 02/09/1988 | US4723919 Telephone interface connection device |
| 02/02/1988 | US4722702 High density front administered protector block |
| 01/28/1988 | DE3717937A1 Method and arrangement for speech protection in MFC push-button signal receivers |
| 01/28/1988 | DE3623551A1 Disconnecting strip for electronic switching systems, particularly for telephone systems or the like |
| 01/27/1988 | EP0254309A1 Multiple device for holding bundles of wires in a telephone exchange |
| 01/14/1988 | DE3623355A1 Distribution box for telecommunications cables |
| 01/12/1988 | CA1231478A1 Constant-percent break pulse corrector |
| 01/12/1988 | CA1231410A1 Connector block with solderless, non-screwed and stripping-free terminals having a polytropic air gap for terminating cable wires and dropwire cables |
| 01/07/1988 | EP0251924A1 Apparatus for testing a cross-point switching matrix, and matrix comprising such an apparatus |
| 01/05/1988 | US4718057 Streamlined digital signal processor |
| 12/29/1987 | US4715830 Wire strain relief and conductor retainer construction for telephone blocks |
| 12/29/1987 | US4715502 Telephone equipment rack |
| 12/23/1987 | EP0249750A2 Wire distribution apparatus |
| 12/17/1987 | WO1987007799A1 A telephone line monitoring system |
| 12/17/1987 | EP0231259A4 Nationwide radio paging system. |
| 12/15/1987 | CA1230435A1 Square root circuit |
| 12/09/1987 | EP0248325A2 Method for the through-connection testing of a broadband switching network |
| 12/08/1987 | US4712232 Multiple telephone jack slide assembly |
| 12/08/1987 | CA1230174A1 Frame system for low-current installations, in particular for distributor systems |
| 11/25/1987 | EP0246480A2 Circuit in telephone exchanges for the evaluation of binary signs of which the binary values are created by fixed current values different from each other |
| 11/25/1987 | CN86103381A Numerical multi-frequecy signal pick-up |
| 11/24/1987 | US4709388 Subscriber telephone line interface circuit with reduced power stand-by mode |
| 11/24/1987 | US4709344 Programmable multifrequency digital tone receiver |
| 11/24/1987 | CA1229689A1 Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level |
| 11/24/1987 | CA1229672A1 Interface module with modular jack for telecommunications systems |
| 11/19/1987 | WO1987007105A1 Remote sensor with inductively coupled power supply |
| 11/17/1987 | US4707764 Equipment cabinet |
| 11/11/1987 | CN87103287A Connector bank for cable wires, in particular of telephone cables |
| 11/04/1987 | EP0244347A2 Connection block for cable cores, particularly those of telephone cables |
| 11/04/1987 | EP0243561A1 Tone detection process and device for implementing said process |
| 10/28/1987 | EP0243296A1 Divider device, particularly for the main divider of telecommunication installations |
| 10/28/1987 | EP0243088A2 Distribution frames and electrical connectors |
| 10/28/1987 | EP0243086A2 Cross-connect connectors |
| 10/21/1987 | EP0241604A2 Polarity reversal circuit |
| 10/20/1987 | US4701950 Telephone answering system with line detector |
| 10/20/1987 | US4701948 Communication system having separate unidirectional information signalling |
| 10/20/1987 | US4701135 High density connector for main frames in telephone systems |
| 10/13/1987 | US4700384 Indoor telephone line demarcation box having several compartments |
| 10/08/1987 | DE3610869A1 Distribution rack |
| 10/07/1987 | EP0240211A2 Switching network |
| 10/07/1987 | EP0239809A2 Audio frequency signal identification apparatus |
| 10/06/1987 | US4698769 Supervisory audio tone detection in a radio channel |
| 10/06/1987 | US4697874 Distribution frame for optical cables |
| 09/30/1987 | EP0238819A2 Terminal test plug |
| 09/30/1987 | EP0116555B1 Adaptive signal receiving method and apparatus |
| 09/29/1987 | CA1227586A1 Call progress for a computer telephone interface |
| 09/23/1987 | EP0238097A2 Multi-system paging device with power conservation |
| 09/22/1987 | US4696031 Signal detection and discrimination using waveform peak factor |
| 09/22/1987 | US4695804 Apparatus for generating a multi-frequency signal |
| 09/17/1987 | DE3706797A1 Rack system for light-current installation construction, especially for distribution installations |
| 09/15/1987 | US4694488 Distributing frame for telecommunications circuits |
| 09/15/1987 | US4694482 Digital tone detector |
| 09/08/1987 | US4692939 Switch testing |
| 09/02/1987 | EP0233892A1 A telephone line switch. |
| 08/26/1987 | EP0233527A2 Terminal assembly |
| 08/25/1987 | US4689760 Digital tone decoder and method of decoding tones using linear prediction coding |
| 08/25/1987 | US4688865 Circuit device for connection to contacts in a row |
| 08/25/1987 | CA1226058A1 Main distributing frame board for an electronic switching system |
| 08/18/1987 | CA1225729A1 Fault-tolerant array of cross-point switching matrices |
| 08/18/1987 | CA1225727A1 Multifrequency tone distribution using a conferencing arrangement |
| 08/12/1987 | EP0231259A1 Nationwide radio paging system. |
| 08/11/1987 | US4686702 Signal transmission control apparatus |
| 08/11/1987 | US4686699 Call progress monitor for a computer telephone interface |
| 08/11/1987 | US4686490 Digital data modulator and digital-to-analog converter |
| 08/11/1987 | US4685755 Terminal assembly |
| 07/28/1987 | US4683567 Asynchronous signaling system for digital communication channel |
| 07/28/1987 | CA1224893A1 Dialing tone generation |
| 07/16/1987 | DE3600864A1 Circuit arrangement with means for setting the correct polarity of a telephone connection line |
| 07/14/1987 | US4680784 Traffic simulator for testing exchanges taking the subscriber-system interaction into account |
| 07/14/1987 | US4680758 Switching system having tone trunk |
| 07/08/1987 | EP0228096A2 Signal detection and discrimination using waveform peak factor |
| 07/07/1987 | US4679232 Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed |
| 07/07/1987 | US4679001 For suppressing energy at time varying frequencies |
| 07/07/1987 | CA1223933A1 Transmission line control system |
| 06/30/1987 | US4676568 Terminal test plug |
| 06/30/1987 | CA1223656A1 Network interface device |
| 06/24/1987 | EP0226325A1 Signalling detection |
| 06/23/1987 | US4675900 Wire terminal panel for building cable system |