| Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881) |
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| 03/01/1994 | US5291479 Modular user programmable telecommunications system with distributed processing |
| 03/01/1994 | CA2004596C Device for connecting optical lines to a wideband telecommunications exchange |
| 03/01/1994 | CA1327413C Optical communications network |
| 02/24/1994 | DE4236808C1 Testing procedure for telecommunications exchange - comparing test results data of exchange with those of reference exchange converted into suitable format |
| 02/23/1994 | EP0583368A1 Method and apparatus for translating signaling information |
| 02/23/1994 | CN2157640Y Inverted signal generator for telephone |
| 02/23/1994 | CN1082793A A queueing system for switches having "fast-circuit" properties |
| 02/22/1994 | US5289537 On-hook transmission circuit in cable line |
| 02/22/1994 | US5289536 Least cost routing method according to information transfer capability of customer premises equipment |
| 02/22/1994 | US5289535 Context-dependent call-feature selection |
| 02/22/1994 | US5289528 Automatic telephone answering apparatus with call forwarding arrangement |
| 02/22/1994 | US5289524 Data transmission method and unit |
| 02/22/1994 | US5289523 Telecommunications relay service method and apparatus |
| 02/22/1994 | US5289472 Method for the tranmission of message associated user-to-user information |
| 02/22/1994 | US5289368 Force management system user interface |
| 02/22/1994 | CA2017380C End-to-end network surveillance |
| 02/17/1994 | WO1994003991A1 Advice signal at incoming calls for occupied terminal |
| 02/16/1994 | EP0583190A1 Telecommunications network with separate call and connection processing |
| 02/16/1994 | EP0583137A2 Architecture for a cellular wireless telecommunication system |
| 02/16/1994 | EP0583135A2 Intelligent call screening in a virtual communications network |
| 02/16/1994 | EP0229170B1 Statistical analysis system and method for use with public communication facility |
| 02/16/1994 | CN2156635Y All-automatic switch for telephone |
| 02/16/1994 | CN2156634Y Program control residance telephone multi-function multiplexing device |
| 02/16/1994 | CN1082300A Method for distributing technology selective connecting and fixed connecting resources from comunication system |
| 02/16/1994 | CN1082283A High-speed facility protection in a digital telecommunications system |
| 02/16/1994 | CN1082280A Method of managing, in a telecommunication network, user data of a use R who may move from a base work area associated with a base exchange to anothers work area associated with another excha |
| 02/16/1994 | CN1082256A Surge arrestor fail safe thermal overload mechanism |
| 02/15/1994 | US5287498 Message transmitting system wherein recipient site is determined using information concerning the relationship between the sender and recipient sites |
| 02/15/1994 | US5287404 Telephone subscriber line voltage change detection |
| 02/15/1994 | US5287401 Apparatus and method for a modem for detecting a call waiting signal |
| 02/15/1994 | US5287347 Arrangement for bounding jitter in a priority-based switching system |
| 02/15/1994 | US5287346 Packet switch |
| 02/15/1994 | US5287344 Transferring lines in a digital loop carrier transmission system |
| 02/15/1994 | US5287199 Facsimile message processing and routing system |
| 02/15/1994 | CA2054505C Telephone connection to a nearby dealer |
| 02/15/1994 | CA2024311C Automated booking of telecommunications calls |
| 02/15/1994 | CA2005116C Automated call handling apparatus |
| 02/15/1994 | CA1327061C Method for generating an alarm indication signal (ais) |
| 02/09/1994 | EP0582440A2 International priority calling system |
| 02/09/1994 | EP0582439A1 Subscriber line interface circuit with impedance synthesis |
| 02/09/1994 | EP0582418A2 Signalling network management |
| 02/09/1994 | CN1081804A Group facility protection in a digital telecommunications system |
| 02/08/1994 | USRE34536 Call management system with protocol converter and port controller |
| 02/08/1994 | US5285100 Semiconductor switching device |
| 02/07/1994 | CA2097354A1 Battery feed circuit |
| 02/03/1994 | WO1994003008A1 System and method for call-by-call source routing with rule-based fallbacks |
| 02/02/1994 | EP0581689A1 Communication method and system between a calling equipment and a called equipment via a telephone exchange |
| 02/02/1994 | EP0581528A1 Data communications equipment security device using calling party directory number |
| 02/02/1994 | EP0581526A2 Intelligent network communication system |
| 02/02/1994 | EP0581484A2 Modular adjunct processor |
| 02/02/1994 | EP0581029A2 Method for allocation of the switching ressources of a telecommunication system for dial-up and permanent connections |
| 02/02/1994 | EP0580947A2 Method for measuring electrical quantities |
| 02/02/1994 | EP0580893A1 Test method for testing a subscriber connection |
| 02/02/1994 | EP0580888A1 Control method for a test system |
| 02/02/1994 | CN1081552A Arrangement for elongation of the subscribers' loop |
| 02/01/1994 | US5283827 Digital line card for interfacing a remotely located digital telephone to a central office system |
| 02/01/1994 | US5283824 Calling line identification |
| 02/01/1994 | US5283788 ISDN D channel congestion control method |
| 02/01/1994 | US5283731 Computer-based classified ad system and method |
| 02/01/1994 | US5283637 Telecommunication system for transmitting full motion video |
| 01/30/1994 | CA2101459A1 Telecommunication network separately processing calls and connections |
| 01/30/1994 | CA2099949A1 Data communications equipment security device using calling party directory number |
| 01/26/1994 | WO1994000947A1 Coin/card operated public telephone and its controlling method |
| 01/26/1994 | EP0580397A2 Conferencing apparatus |
| 01/26/1994 | EP0580249A2 Method and device for the matching of the impedances of the subscriber termination and of the subscriber access to the characteristic impedance of the subscriber telephone line |
| 01/26/1994 | EP0580190A2 Interface to and operation of a voice messaging system |
| 01/25/1994 | US5282243 Recording of automatic number identification to identify lost customers |
| 01/25/1994 | US5282241 Modem pooling system |
| 01/25/1994 | CA1326530C Programmable threshold alert |
| 01/20/1994 | WO1994001961A1 Switching arrangement for a communications channel |
| 01/20/1994 | WO1994001960A1 Remotely actuated switch and protection circuit |
| 01/20/1994 | WO1994001959A1 Telephony system with supervisory management center and parameter testing with alerts |
| 01/20/1994 | WO1994001824A1 A single chip integrated circuit system architecture for video-instruction-set-computing |
| 01/20/1994 | DE4223334A1 Music and speech player on telephone hold line - mixes LF analog speech and music signals under control of micro-controllers and varies speech intervals to vary output signal |
| 01/20/1994 | CA2139436A1 Switching arrangement for a communications channel |
| 01/20/1994 | CA2139435A1 Remotely actuated switch and protection circuit |
| 01/19/1994 | EP0579287A2 Interface to and operation of a voice messaging system |
| 01/19/1994 | EP0579040A2 Connection protection in a digital telecommunications system |
| 01/19/1994 | EP0579029A2 Connection protection in a digital telecommunications system |
| 01/19/1994 | EP0578964A2 A call processing system |
| 01/19/1994 | EP0268667B1 A telephone line monitoring system |
| 01/18/1994 | US5280583 System and method for performing interlocution at a plurality of terminals connected to communication network |
| 01/18/1994 | US5280581 Enhanced call-back authentication method and apparatus for remotely accessing a host computer from a plurality of remote sites |
| 01/18/1994 | US5280561 Method for processing audio signals in a sub-band coding system |
| 01/18/1994 | US5280529 Communication network intended for secure transmissions |
| 01/18/1994 | US5280525 Adaptive frequency dependent compensation for telecommunications channels |
| 01/18/1994 | US5280523 Telephone line message waiting and ring indicator |
| 01/18/1994 | CA2022263C Attendant-controlled call message delivery system and method |
| 01/18/1994 | CA2022262C Call message delivery system and method |
| 01/18/1994 | CA1326299C Speaker verification system using integrated circuit cards |
| 01/17/1994 | CA2100625A1 Key telephone apparatus |
| 01/12/1994 | EP0578374A1 Method and apparatus for providing a personal locator, access control and asset tracking service using an in-building telephone network |
| 01/11/1994 | US5278898 System for managing a hold queue |
| 01/11/1994 | US5278897 Smart internodal transfer for subscriber access in multinode voice messaging systems |
| 01/11/1994 | US5278895 Voice messaging method and apparatus for pay phone telephone systems |
| 01/11/1994 | US5278894 Use of incoming caller line identification |
| 01/11/1994 | US5278889 Video telephony dialing |
| 01/11/1994 | US5278823 For testing telecommunication networks coupled to one another |
| 01/11/1994 | US5278730 Modular notebook computer having a planar array of module bays |
| 01/11/1994 | CA1326075C Automatic speech recognition using echo cancellation |