| Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881) |
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| 07/14/1992 | US5130978 Method of managing traffic flows in a wideband integrated services digital network, and a network for implementing the method |
| 07/12/1992 | CA2058657A1 System for accessing amenities through a public telephone network |
| 07/08/1992 | EP0493991A1 Speech control apparatus |
| 07/08/1992 | EP0493915A2 A switching system using identical switching nodes |
| 07/08/1992 | EP0493914A2 Transparent signaling for remote terminals |
| 07/08/1992 | EP0493913A2 Transparent communication of control information through a switching network |
| 07/08/1992 | EP0493912A2 Transparent remoting of switching network control over a standard interface link |
| 07/08/1992 | EP0493896A2 Method and circuitry for routing a call |
| 07/08/1992 | EP0493894A1 Telephone network credit card calling apparatus and method of operation |
| 07/08/1992 | EP0493703A1 Communication system especially telephone communication system |
| 07/08/1992 | EP0493427A1 Call completion system. |
| 07/08/1992 | EP0343160B1 Automatic speech recognition to select among call destinations |
| 07/08/1992 | CN1017391B Subminiature extending protector for communication exchanger |
| 07/07/1992 | US5128990 Method for exchanging a buzz signal between keyphone subsets |
| 07/07/1992 | US5128989 Key telephone system with circuitry for adding a third caller to a multiple party connection |
| 07/07/1992 | US5128984 Telephone interface call processing system with call selectivity |
| 07/07/1992 | US5128982 Electronic apparatus for "Hands off" control of a voice mail system |
| 07/07/1992 | US5128981 Radio communication system and a portable wireless terminal |
| 07/07/1992 | US5128928 Digital radio telephone system |
| 07/07/1992 | US5128927 Switching network and switching network control for a transmission system |
| 07/07/1992 | US5128619 System and method of determining cable characteristics |
| 07/07/1992 | CA1304848C Method and apparatus for wideband transmission of digital signals between, for example, a telephone central office and customer premises |
| 07/02/1992 | DE4041319A1 Audio-visual communication system between several transceivers - which have manual message keys transmitting signal to transceiver with central control and display |
| 07/01/1992 | EP0493292A2 Look-ahead method and apparatus for predictive dialing using a neural network |
| 07/01/1992 | EP0492972A2 Serial link communication systems |
| 07/01/1992 | EP0492049A2 Distributed telephone conference control device |
| 07/01/1992 | CN2109028U Electronic transmit-receive number plate of crossbar automatic telephone exchanger |
| 07/01/1992 | CA2056203A1 Method and circuitry for routing a call from a calling station to a desired nearby destination station |
| 06/30/1992 | US5127043 Simultaneous speaker-independent voice recognition and verification over a telephone network |
| 06/30/1992 | US5127004 Tone and announcement message code generator for a telephonic switching system and method |
| 06/30/1992 | US5127003 Digital/audio interactive communication network |
| 06/30/1992 | US5126543 Integrated hand microphone with barcode reader and dictation controls |
| 06/30/1992 | CA1304526C Dynamic callback technique |
| 06/30/1992 | CA1304483C Coordinated transfer of voice and information through a digital switch |
| 06/29/1992 | WO1992012574A1 Method and apparatus for detecting digital carrier signals on telephone cables |
| 06/29/1992 | CA2099660A1 Method and apparatus for detecting digital carrier signals on telephone cables |
| 06/25/1992 | WO1992004794A3 Alarm and test system for a digital main line |
| 06/25/1992 | DE4127966A1 Dialog-nebenstellenvermittlungsanlage Dialogue private branch exchange |
| 06/24/1992 | EP0491493A1 Generalized telecommunications customer signaling arrangement |
| 06/24/1992 | EP0491491A2 Call processing method for distributed switching |
| 06/24/1992 | EP0491244A2 Communication network with a plurality of communication exchanges |
| 06/23/1992 | US5125082 Management system capable of quickly assigning a terminal endpoint identifier to a terminal equipment unit |
| 06/23/1992 | US5125024 Voice response unit |
| 06/23/1992 | US5125023 Software switch for digitized audio signals |
| 06/23/1992 | US5125022 Method for recognizing alphanumeric strings spoken over a telephone network |
| 06/19/1992 | WO1992011724A1 Visual programming of telephone network call processing logic |
| 06/19/1992 | WO1992011603A1 Systems and processes for specifying customized telecommunication services |
| 06/17/1992 | EP0490788A1 Protection circuit with low capacitance |
| 06/17/1992 | EP0490787A1 Protection circuit limiting overvoltages between selected limits and its monolithic integration |
| 06/17/1992 | EP0490786A1 Programmable protection circuit and monolithic manufacturing thereof |
| 06/17/1992 | CN1062061A Telephone ringer circuit |
| 06/16/1992 | US5123041 Apparatus for testing telephone cables |
| 06/16/1992 | US5123032 Analog "blue" signal detector |
| 06/14/1992 | WO1992010900A1 Interactive telephone communication system for hearing-impaired person |
| 06/14/1992 | CA2096968A1 Interactive telephone communication system for hearing-impaired person |
| 06/11/1992 | WO1992010069A1 A method and arrangement for connecting selectively a stationary subscriber apparatus to a neighbouring mobile subscriber apparatus with the aid of a telephone switchboard function |
| 06/11/1992 | DE4038321A1 Engaging central office set in PBX installation - involves two tests, and during second one central office determining free terminal to be used |
| 06/10/1992 | EP0489645A2 Voice level controller |
| 06/10/1992 | EP0489543A2 Telephone network speech signal enhancement |
| 06/10/1992 | EP0489512A2 Telephone ringer circuit |
| 06/10/1992 | EP0253871B1 Direct access test unit for central office |
| 06/10/1992 | CN2107091U Multi-functional telecommunication line tester |
| 06/09/1992 | US5121424 Telephone system and speech level adjusting method therefor |
| 06/09/1992 | US5121421 Interactive telephone communication system for hearing-impaired person |
| 06/09/1992 | US5121420 Automatic line defect detector |
| 06/09/1992 | US5121391 Subscriber RF telephone system for providing multiple speech and/or data singals simultaneously over either a single or a plurality of RF channels |
| 06/09/1992 | US5121126 Beacon enhanced telecommunications system and method |
| 06/09/1992 | CA1303263C Method and apparatus for visual indication of stored voice signals |
| 06/09/1992 | CA1303245C Semiconductor switching device |
| 06/06/1992 | CA2056132A1 Telephone ringer circuit |
| 06/03/1992 | EP0488830A2 T-carrier network simulator |
| 06/03/1992 | EP0488399A2 A telephone subscriber accommodation system in a broadband network |
| 06/03/1992 | EP0488223A2 In-house paying system with abnormal conditions transmitting unit |
| 06/03/1992 | EP0487811A1 Digital telecommunication system with intelligent user terminals |
| 06/03/1992 | CN2106456U Fully automatic exchange (switchboard) for two telephones |
| 06/02/1992 | US5119418 Telephone system with several terminals on a single line |
| 06/02/1992 | US5119416 Automated telephone number identification for automatic intercept in telephone networks |
| 06/02/1992 | US5119415 Method of displaying called party information on calling party terminal and communication network using the method |
| 06/02/1992 | US5119413 System and method to alter the functions assigned to the keys of a terminal connected to an electronic exchange |
| 06/02/1992 | US5119375 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
| 06/02/1992 | US5119366 Call processing method for distributed switching |
| 06/02/1992 | US5119365 Bi-directional buffer line amplifier |
| 05/31/1992 | CA2056227A1 Real-time decentralized network traffic management using a parallel algorithm |
| 05/31/1992 | CA2045068A1 T-carrier network simulator |
| 05/30/1992 | CA2056506A1 Digital telecommunication system with intelligent user terminals |
| 05/29/1992 | WO1992009166A1 Telephone recording device |
| 05/27/1992 | EP0487197A2 Telephone answer supervision and service selection |
| 05/27/1992 | EP0486888A2 Telephone line unit having programmable read only memory |
| 05/27/1992 | CN2105811U Responder interface for operator |
| 05/27/1992 | CN1016827B Operating method of multiprocessor central control unit in high-efficiency fail-safe for exchange system |
| 05/26/1992 | US5117455 Telephone keypad matrix |
| 05/26/1992 | US5117454 Exchange having a display apparatus for displaying calls terminated at an attendant console |
| 05/26/1992 | US5117451 Interface to and operation of a voice messaging system |
| 05/26/1992 | US5117372 Graphics-assisted terminal administration arrangement |
| 05/21/1992 | WO1992009164A1 Telephone call handling system |
| 05/20/1992 | EP0486204A1 Apparatus and method to perform validation of credit cards in an ISDN network |
| 05/20/1992 | EP0485980A2 Message service control system |
| 05/20/1992 | CN2105152U Contactless touch type operator code transmitter |
| 05/19/1992 | US5115466 Communication network intended for secure transmission of speech and data |
| 05/19/1992 | US5115462 Remotely controlled apparatus for conditioning telephone line exclusive of metallic DC bypass pair |