| Patents for H04Q 1 - Details of selecting apparatus or arrangements (11,745) |
|---|
| 08/29/1989 | CA1258900A1 Distribution frames and electrical connectors |
| 08/24/1989 | WO1989007811A1 Paging system lata switch |
| 08/24/1989 | WO1989007810A1 Paging system sublocal switch |
| 08/24/1989 | WO1989007809A1 Paging system with dynamically programmable reception frequencies |
| 08/24/1989 | WO1989007808A1 Paging system with commands for changing functionality of a paging receiver |
| 08/23/1989 | CN1035031A Multi-frequency signal receiver |
| 08/22/1989 | US4860350 Retrofit network interface apparatus |
| 08/22/1989 | US4860348 Modular jack panel construction |
| 08/22/1989 | US4860343 Composite cable for use in high frequency data and voice transmission |
| 08/22/1989 | US4860334 System for detecting and locating defective crosspoint switches |
| 08/15/1989 | CA1258491A1 Terminal test plug |
| 08/08/1989 | US4854884 Telephone distribution frame connector assembly for use with central office protector module having alarm indicator |
| 08/03/1989 | DE3801876A1 Cross-connection matrix for optical waveguides |
| 08/02/1989 | EP0179812B1 Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level |
| 08/02/1989 | CN2042263U Protective socket for telephone wire distributor |
| 08/02/1989 | CN1034460A Error correction method in switch and switch provided with error correction means |
| 08/01/1989 | US4853960 Station interface and protector apparatus |
| 08/01/1989 | US4853958 LPC-based DTMF receiver for secondary signalling |
| 07/26/1989 | EP0325318A2 Switching exchange |
| 07/25/1989 | US4852160 Channel unit interface circuit |
| 07/25/1989 | US4852157 Multi-task state machine signalling translator |
| 07/25/1989 | US4851967 Distribution bank for communication cables |
| 07/25/1989 | US4850897 Adapter for providing electrical access to circuits in a cable head assembly |
| 07/20/1989 | DE3806262C1 Circuit arrangement for monitoring the state of switching points in a digital space-division switching network |
| 07/19/1989 | EP0324662A2 Crossbar system for controlled data transfer |
| 07/19/1989 | EP0324012A1 Shorted-coaxial-cable detector for local-area networks. |
| 07/19/1989 | CN1034105A Combining technology and guiding device for making 24lane or 12lane copper based silver-cerium electric contact materials |
| 07/18/1989 | US4850014 Multiple dwelling interface box |
| 07/18/1989 | US4849688 Detection of single-frequency signals |
| 07/13/1989 | WO1989006472A1 Acknowledge back pager with adaptive variable transmitter output power |
| 07/11/1989 | US4847781 Energy management system |
| 07/11/1989 | US4846735 Telecommunication terminal strip |
| 07/06/1989 | DE3743632A1 Cross-connection coupler for optical waveguides |
| 07/06/1989 | DE3743108A1 Cross-connection matrix for optical waveguides |
| 07/05/1989 | EP0323000A2 An optical backplane |
| 06/29/1989 | WO1989006084A1 An error correction method in a switch and a switch provided with error correction means |
| 06/28/1989 | EP0321752A2 Device to connect and join electrical conductors together |
| 06/28/1989 | EP0321743A2 Connection strip for incoming and outgoing electrical lines |
| 06/21/1989 | EP0321426A1 An error correction method in a switch and a switch provided with error correction means |
| 06/21/1989 | EP0282577A4 Energy management system. |
| 06/21/1989 | EP0233892A4 A telephone line switch. |
| 06/20/1989 | US4840570 Plug-in card module |
| 06/20/1989 | US4840568 Jack assembly |
| 06/14/1989 | EP0319909A2 Rack for electrical telecommunication |
| 06/13/1989 | US4839920 Method for determining telephone dial pulse parameters independently of subscriber line length |
| 06/13/1989 | US4839842 Digital tone detection and generation |
| 06/01/1989 | DE3348151C2 Cable attachment device |
| 05/31/1989 | EP0317852A2 Remote cable pair cross-connect system |
| 05/30/1989 | US4835659 Telephone drop box with permanently wired feeder cable |
| 05/24/1989 | EP0316821A2 Housing for containing electrical assemblies |
| 05/23/1989 | US4833708 Remote cable pair cross-connect system |
| 05/23/1989 | US4833399 DTMF receiver |
| 05/23/1989 | US4832192 Maintenance termination unit circuit structure |
| 05/17/1989 | EP0316259A2 Connector block composed of a plurality of subblocks |
| 05/16/1989 | CA1254276A1 Indoor type telephone network interface device |
| 05/10/1989 | CN1032874A Automated matrix for communication line connection |
| 05/09/1989 | US4829564 Distribution frame board |
| 05/09/1989 | US4829562 Receiver for detecting different fixed frequency signals on a telephone trunkline |
| 05/03/1989 | CN2037103U Thermal fusing coil for safety device of telephone mainframe |
| 05/03/1989 | CN1032723A Apparatus by which auxiliary slide-in units are connected to slide-in units |
| 05/02/1989 | US4827505 Subscriber line interface circuit |
| 05/02/1989 | US4827504 Network interface enclosure |
| 05/02/1989 | US4827502 Environmentally protected housing for using central office protector modules outdoors |
| 04/26/1989 | EP0313241A1 Jackfield with split front panel |
| 04/26/1989 | EP0313240A1 Jack module with lamp assembly |
| 04/26/1989 | EP0313218A2 Apparatus by which auxiliary slide-in units are connected to slide-in units |
| 04/25/1989 | US4825466 Telephone interface security device |
| 04/25/1989 | US4825193 Acknowledge back pager with adaptive variable transmitter output power |
| 04/25/1989 | US4824403 Telephone connector block for cradle type installtion |
| 04/18/1989 | US4822306 Connector bank for telecommunication devices |
| 04/18/1989 | CA1252860A1 Pre-cutover verification of switching system subscriber lines served via digital carrier facilities |
| 04/18/1989 | CA1252854A1 Microcomputer controlled locking system |
| 04/12/1989 | EP0311271A2 Automated matrix for comunication line connections |
| 04/12/1989 | EP0310785A2 Expert system for processing errors in a multiplex communication system |
| 04/11/1989 | US4821313 Paystation transmitter ground detect circuitry |
| 04/11/1989 | CA1252585A1 Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed |
| 04/04/1989 | US4817910 Retaining system, in particular for retaining bundles of wires in a telephone exchange |
| 03/28/1989 | US4817134 Automated matrix for communication line connections |
| 03/28/1989 | CA1251849A1 Modular distribution frame with protector structure |
| 03/28/1989 | CA1251848A1 Modular distribution frame assembly |
| 03/21/1989 | US4815126 Telephone line switch |
| 03/21/1989 | US4815124 DX circuit |
| 03/21/1989 | US4815104 Digital telecommunications network, cross-connect module |
| 03/21/1989 | US4813880 Arrangement for main distribution frames |
| 03/21/1989 | CA1251527A1 Adaptive stop-notch filter |
| 03/15/1989 | EP0306664A2 Audible tone and voice announcing generator for digital telecommunication exchanges, especially for telephone exchanges |
| 03/15/1989 | CN1031781A Device for holding connector banks in telecommunication systems |
| 03/14/1989 | US4813071 Laminar type telephone connector block |
| 03/08/1989 | CN1003550B Connecting block for digital system cross-connect frame |
| 03/07/1989 | US4811386 Called party response detecting apparatus |
| 03/07/1989 | US4811333 Substantially non-blocking space switching arrangement |
| 03/07/1989 | US4811169 Single sided DSX frame |
| 03/02/1989 | DE3727833A1 Housing unit for accommodating the main distributor of a telecommunications system, especially of a communications system |
| 02/28/1989 | US4808116 Telephone distribution frame connector assembly |
| 02/22/1989 | EP0304393A2 Device for holding telecommunication connector blocks |
| 02/22/1989 | EP0303857A2 Support element |
| 02/15/1989 | CN1031160A Connection block for telecommunication engineering |
| 02/14/1989 | CA1250024A1 Supervisory audio tone detection in a radio channel |
| 02/08/1989 | EP0302814A2 Terminal block for the telecommunication technique |
| 01/25/1989 | EP0300265A2 Digital tone detection method |