| Patents for H04Q 11 - Selecting arrangements for multiplex systems (43,004) |
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| 01/31/1989 | US4802220 Method and apparatus for multi-channel communication security |
| 01/31/1989 | US4801190 Two-way optical fiber transmission network |
| 01/25/1989 | EP0300492A2 Time-division multiplex switching network |
| 01/18/1989 | EP0299473A2 Switching system and method of construction thereof |
| 01/18/1989 | EP0299207A2 Circuitry for the selective reading of information of a bit group-oriented, continuous flow of information in an ISDN oriented interface |
| 01/17/1989 | US4799256 Telecommunication signalling arrangement |
| 01/17/1989 | US4799217 Three time slot digital subscriber line termination |
| 01/17/1989 | US4799216 Distributed switching system |
| 01/12/1989 | WO1989000371A1 Switching element for pcm signals |
| 01/12/1989 | DE3721804A1 Method for a digital switching system |
| 01/11/1989 | EP0181371B1 Integrated packet switching and circuit switching system |
| 01/10/1989 | US4797904 Transmitter for ISDN S-bus interface circuit |
| 01/10/1989 | US4797879 Packet switched interconnection protocols for a star configured optical lan |
| 01/10/1989 | US4797875 Method for monitoring and controlling the traffic in digital transmission networks |
| 01/10/1989 | US4797654 Data format conversion circuit |
| 01/10/1989 | US4797589 Dynamically reconfigurable time-space-time digital switch and network |
| 01/10/1989 | CA1248616A1 Telephone switching system switch processor interface |
| 01/10/1989 | CA1248604A1 Loop around data channel unit |
| 01/05/1989 | DE3720644A1 Circuit arrangement for switching PCM channels |
| 01/04/1989 | EP0297326A2 Circuitry for a connection component in a time division multiplex digital telecommunications network |
| 01/04/1989 | CN1030168A Call monitor arrangement |
| 01/03/1989 | US4796294 Electronic telephone exchange and method of connecting ports of the exchange |
| 01/03/1989 | US4796254 Broadband space switching network and parallel-series converter and series-parallel converter for use in such a space switching network |
| 01/03/1989 | CA1248248A1 Method of switching time slots in a tdm-signal and arrangement for performing the method |
| 12/29/1988 | DE3720186A1 Method for a computer-controlled switching system, in particular a so-called KEY telephone switching system |
| 12/28/1988 | EP0296832A2 A call monitor arrangement |
| 12/28/1988 | EP0296201A1 Optical communications network |
| 12/28/1988 | CN88102621A Telecommunication relay apparatus for centralized control, particularly circuit system of pcm telephone exchange, system having central unit and connected relay group |
| 12/28/1988 | CA1247739A Time division multiplexing ram |
| 12/28/1988 | CA1247725A Digital switching system with two-directional addressing rams |
| 12/27/1988 | US4794644 Method of secured communications in a telecommunications system |
| 12/27/1988 | US4794593 Time-division multiplexed communication apparatus |
| 12/27/1988 | US4794590 Communication network control system |
| 12/22/1988 | DE3718986A1 Method of controlling a digital communication system with decentralised memory devices (memory division) |
| 12/22/1988 | DE3718742A1 Electric circuit arrangement for coupling telecommunications functional units to the telephone network |
| 12/20/1988 | US4792970 Expansion port for use in a communication system |
| 12/20/1988 | US4792969 Line condition data collecting system for a telephone exchange |
| 12/20/1988 | US4792944 Time-division multiplexing communication system for performing a plurality of communications having different data speeds |
| 12/20/1988 | US4792800 Local communication system among ISDN terminal equipments |
| 12/14/1988 | EP0295198A1 Method for controlling a digital communication system by a system controller |
| 12/14/1988 | EP0295022A2 Call control of a distributed processing communications switching system |
| 12/14/1988 | EP0294644A1 Method for operating of a circuit arrangement for a centrally controlled telecommunication exchange, especially a PCM telephone exchange, with a central part and with connection groups connected to this central part |
| 12/13/1988 | US4791662 Controlling key-system groups from a distributed control switching system |
| 12/13/1988 | US4791660 Variable data compression announcement circuit |
| 12/13/1988 | US4791640 Call charging arrangement |
| 12/13/1988 | US4791639 Communications switching system |
| 12/13/1988 | US4791629 Communications switching system |
| 12/08/1988 | DE3716141A1 Charge indicator for ISDN switching systems |
| 12/07/1988 | EP0294318A2 Circuit arrangement for controlling the parallel access of decentralized memories (fault address memory) |
| 12/07/1988 | EP0294317A2 Shared access to a common memory by a central data processor and a decentralized input/output processor |
| 12/07/1988 | EP0294316A2 Control method for a digital communication system in the reset-hold state |
| 12/07/1988 | EP0294133A2 Protocols for very high-speed optical LANs |
| 12/06/1988 | US4789981 System for providing data services to a circuit switched exchange |
| 12/06/1988 | CA1246177A1 Method of simultaneously transmitting isochronous and nonisochronous data on a local area network |
| 11/30/1988 | EP0292476A1 Low speed gate circuit |
| 11/29/1988 | US4788680 Method of selecting time slot in time division switching network and apparatus therefor |
| 11/29/1988 | US4787693 Passive star coupler |
| 11/29/1988 | US4787692 Electro optical switch architectures |
| 11/23/1988 | EP0291791A1 Circuit arrangement for telecommunication exchanges, especially PCM time division multiplex telephone exchanges, with decentralized switching stages connected to a centralized switching network |
| 11/23/1988 | EP0291790A1 Circuit arrangement for telecommunication exchanges, especially PCM time-division telephone exchanges, with decentralized switching stages connected to a cental switching network |
| 11/23/1988 | EP0291789A1 Circuit arrangement for centrally controlled time division multiplex telecommunication exchanges, especially PCM telephone exchanges, with line groups connected to a switching network |
| 11/22/1988 | US4787081 Time division multiplex equipment for use in data transmission equipment |
| 11/22/1988 | US4786899 Circuit arrangement for PCM telecommunication facilities |
| 11/22/1988 | CA1245320A1 Method and apparatus for looping around a digital transmission line at a channel unit |
| 11/17/1988 | EP0291382A1 Digital switching system |
| 11/17/1988 | EP0291307A2 Line interface |
| 11/17/1988 | EP0291135A2 Concentrator stage for a broadband switching network |
| 11/17/1988 | EP0290459A1 Switching system |
| 11/16/1988 | CN88102480A Emergency d.c. power supply with emergency state being indicated by polarity reversal |
| 11/15/1988 | US4785446 Distributed bit switching of a multistage interconnection network |
| 11/15/1988 | CA1244923A1 Expansion port for use in a communication system |
| 11/09/1988 | EP0290129A2 Data link controller |
| 11/09/1988 | EP0289733A2 Switching method for integrated voice/data communications |
| 11/09/1988 | EP0289526A1 Adaptive threshold sampling method. |
| 11/09/1988 | CN88102066A Time division multiplex (tdm) switching system especially for pulse code modulated (pcm) telephony signals |
| 11/08/1988 | CA1244540A1 Digital switching system |
| 11/08/1988 | CA1244537A1 Switching system and method for network having a plurality of terminal control equipment units |
| 11/08/1988 | CA1244519A1 Optical networks |
| 11/03/1988 | DE3811980A1 Data transmission gateway for a control unit exhibiting a processor |
| 11/02/1988 | EP0289387A1 Direct current power supply aided by an emergency condition indication by inversion |
| 11/02/1988 | EP0288935A2 Arrangement for creating a supplementary ISDN basic access in an ISDN subscriber installation |
| 11/02/1988 | EP0288675A2 Digital transmission system |
| 11/02/1988 | CN88101276A Digital telephone switching system having message switch with address translation |
| 11/01/1988 | US4782517 System and method for defining and providing telephone network services |
| 11/01/1988 | US4782482 Simultaneous voice and data communications system |
| 11/01/1988 | US4782479 Electronic digital crossconnect system |
| 11/01/1988 | US4782478 Use in a node of a telecommunications network |
| 11/01/1988 | CA1244118A1 Distributed control type electronic switching system |
| 10/25/1988 | US4780870 Packet switch |
| 10/25/1988 | US4780716 Semiconductor integrated switching apparatus |
| 10/25/1988 | CA1243761A1 Networking circuitry |
| 10/25/1988 | CA1243760A1 Path hunting in a distributed control switching system |
| 10/19/1988 | EP0286835A1 Method and circuit for setting subscriber line balance impedances of programmable hybrids |
| 10/18/1988 | US4779265 Multiple access communication system |
| 10/18/1988 | US4779262 Connection of subscriber communication network base station to external information network |
| 10/18/1988 | CA1243387A1 Data switching system |
| 10/18/1988 | CA1243386A1 Processing sequence calls in a distributed control switching system |
| 10/12/1988 | EP0285777A2 Time division multiplex (TDM) switching system especially for pulse code modulated (PCM) telephony signals |
| 10/06/1988 | WO1988007313A3 Improvements in electro optical switch architectures |
| 10/05/1988 | EP0285334A2 Universal asynchronous receiver-transmitter |