| Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881) |
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| 03/18/1993 | WO1993005483A1 Telephonic-interface lottery system |
| 03/18/1993 | DE4129965A1 Conference circuit and bidirectional signal interface - uses input and output stages coupled via signal bus and mixer stage. |
| 03/17/1993 | EP0532209A2 Communication processing apparatus, communication processing system, and communication processing method |
| 03/17/1993 | EP0531493A1 Auxiliary communication service routing. |
| 03/16/1993 | US5195132 Telephone network speech signal enhancement |
| 03/16/1993 | US5195131 Private branch exchange system |
| 03/16/1993 | US5195129 Switching system for application services |
| 03/16/1993 | US5195128 Communication system, particularly a telephone communication system |
| 03/16/1993 | US5195126 Emergency alert and security apparatus and method |
| 03/16/1993 | US5195125 Telephone line connection apparatus |
| 03/16/1993 | US5195124 Testing system for local subscribers |
| 03/16/1993 | US5195087 Telephone system with monitor on hold feature |
| 03/16/1993 | US5195086 Multiple call control method in a multimedia conferencing system |
| 03/16/1993 | US5195085 Communication link identifier |
| 03/10/1993 | EP0531268A2 Business communication number |
| 03/10/1993 | EP0531048A2 A system for providing personalized telephone calling features |
| 03/10/1993 | EP0530746A2 Subscriber loop tester for telephone switching systems |
| 03/10/1993 | EP0530645A2 Telephone signal classification and phone message delivery method and system |
| 03/10/1993 | EP0310781B1 Threshold alarms for processing errors in a multiplex communications system |
| 03/09/1993 | US5193110 Integrated services platform for telephone communication system |
| 03/09/1993 | US5193108 Portable telecommunications test instrument with inductive probe circuit |
| 03/09/1993 | US5193107 Speakerphone test set |
| 03/09/1993 | CA1314319C Automatic call distribution system |
| 03/03/1993 | EP0530153A2 Intermediate telephone line sectioning device |
| 03/03/1993 | EP0529948A2 Telecommunications call processing |
| 03/03/1993 | EP0529914A2 Accessing an object on a computer display screen |
| 03/03/1993 | EP0529721A2 A method of facilitating interchanging the use of a mobile station and a permanently wired telephone set |
| 03/03/1993 | EP0529267A2 Terminal block for telecommunications and data systems engineering |
| 03/03/1993 | EP0528990A1 Simultaneous speaker-independent voice recognition and verification over a telephone network |
| 03/03/1993 | EP0427800A4 Interlock circuit for preventing corruption of telephone line signals |
| 03/02/1993 | US5191605 Telephone surge protector |
| 03/02/1993 | US5191604 Communication apparatus with private branch exchange for communicating with extension or external stations |
| 03/01/1993 | CA2069973A1 All digital conference unit |
| 02/24/1993 | EP0527950A1 Digital computer platform for supporting telephone network applications. |
| 02/24/1993 | EP0527855A1 Long distance telephone switching system with enhanced subscriber services |
| 02/23/1993 | WO1993004550A1 Remote workstation use with database retrieval system |
| 02/23/1993 | US5189692 Telephone operator simulator |
| 02/23/1993 | US5189663 Method of and system for remote testing and reporting of ISDN line conditions |
| 02/18/1993 | WO1993003570A1 Transparent inband signaling |
| 02/18/1993 | CA2114435A1 Transparent inband signaling |
| 02/17/1993 | EP0527260A1 Interface unit for supporting the communication between processor systems |
| 02/17/1993 | CN2127218Y Substation type expanding automatic telecphone switching machine |
| 02/17/1993 | CN2127217Y Telephone limiting unit |
| 02/17/1993 | CN2127216Y Professional examinig machine for telecphone operator |
| 02/16/1993 | US5187740 Method and apparatus for telephone call reorigination |
| 02/16/1993 | US5187735 Integrated voice-mail based voice and information processing system |
| 02/16/1993 | US5187733 Verification of subscriber lines prior to cutover to a new switching system |
| 02/16/1993 | US5187732 Board-to-board test unit for a digital subscriber line |
| 02/16/1993 | US5187705 Data error detecting apparatus for key telephone system and the detecting method therefor |
| 02/16/1993 | US5187704 Monitoring method for stand-by circuits suitable for a multiplexing/demultiplexing apparatus |
| 02/16/1993 | CA1313717C D channel monitor |
| 02/11/1993 | DE4126814A1 Telephone conference circuit - has summing amplifiers for each subscriber connected to switching matrix array, and uses two transmission amplifiers to feed receive line of third participating subscriber |
| 02/11/1993 | DE4125883A1 Subscriber line parameter measurement for telecommunications network - applying test voltage in six line configurations, sampling resulting voltages and solving equations of exponential functions |
| 02/11/1993 | DE4125882A1 Measuring subscriber line parameters of telephone network - applying pulsed voltages in various connection wire-configurations, cross-correlated to preliminary measurement values |
| 02/10/1993 | EP0526979A2 Interactive participation system |
| 02/10/1993 | EP0526832A2 Mobile unit with speed dialing feature for cellular telephone network |
| 02/10/1993 | EP0526788A2 Device for the provision of information by telephone |
| 02/09/1993 | US5185787 Multiple party telephone control system with random dialing for polling |
| 02/09/1993 | US5185786 Automatic call center overflow retrieval system |
| 02/09/1993 | US5185782 ACD arrangement for automatically returning a call at a time specified by the original caller |
| 02/09/1993 | US5185781 Automation of telephone operator assistance calls |
| 02/09/1993 | US5185780 Method for predicting agent requirements in a force management system |
| 02/09/1993 | US5185742 Transparent signaling for remote terminals |
| 02/09/1993 | US5185741 Inter-network connecting system |
| 02/09/1993 | US5185570 Telecommunications signal detector |
| 02/09/1993 | CA1313561C Communications network state and topology monitor |
| 02/04/1993 | WO1993002521A1 Telecommunications service network |
| 02/04/1993 | WO1993002516A1 Facsimile-mail device |
| 02/04/1993 | WO1993002514A2 Apparatus for high speed data transfer |
| 02/04/1993 | WO1993002511A1 Modular, user programmable telecommunications system with distributed processing |
| 02/04/1993 | WO1993002412A1 Dos compatible dictation and voice mail system |
| 02/04/1993 | CA2113442A1 Dos compatible dictation and voice mail system |
| 02/03/1993 | EP0526103A2 ACD multiflow network call distribution |
| 02/03/1993 | EP0525963A2 Generation of a clock frequency in a smart card interface |
| 02/03/1993 | EP0525496A2 Method for measuring the duration of procedures in communication systems |
| 02/03/1993 | EP0525243A1 Method for the display of traced information in a communication system |
| 02/03/1993 | EP0525189A1 Method of displaying circuit state of telephone exchange system |
| 02/03/1993 | EP0525121A1 Distributed protocol for improving the survivability of telecommunications trunk networks |
| 02/03/1993 | EP0524965A1 Private telephone system with simplified command feature. |
| 02/02/1993 | US5184350 Telephone communication system having an enhanced timing circuit |
| 02/02/1993 | US5184345 Enhanced isdn 800 service |
| 02/02/1993 | CA1313319C Optical switching system |
| 01/28/1993 | DE4124711A1 Transmitting stored message of communication system subscriber - storing call number of associated telephone appts. on subscriber side w.r.t. starting inner telephone appts. |
| 01/27/1993 | EP0524669A2 Digital communication system with programming information by way of the B channel |
| 01/27/1993 | EP0524467A2 Band management system in communication |
| 01/27/1993 | EP0524297A1 Digital/audio interactive communication network |
| 01/27/1993 | EP0185029B1 Telephone operator voice storage and retrieval system |
| 01/27/1993 | CN1068457A Operation mode of compute system for cross-bar switchboard |
| 01/26/1993 | US5182766 Generalized telecommunications customer signaling arrangement |
| 01/26/1993 | US5182751 Switching system using identical switching nodes |
| 01/26/1993 | US5182750 Transparent remoting of switching network control over a standard interface link |
| 01/26/1993 | US5182744 Telecommunications network restoration architecture |
| 01/21/1993 | WO1993001685A1 Telecommunication information display system____________________ |
| 01/21/1993 | WO1993001676A1 Ringing trip judging circuit |
| 01/21/1993 | WO1993001665A1 Personal communication system providing supplemental information mode |
| 01/21/1993 | DE4123455A1 Control command transmission system for accessing stored telephone calls - uses password to prevent unauthorised accessing of stored calls |
| 01/21/1993 | CA2112594A1 Personal communication system providing supplemental information mode |
| 01/20/1993 | EP0524100A2 Multi-function telephone apparatus and control method therefor |
| 01/20/1993 | EP0524097A1 Device for the control of a call receiver of a telephone set in a domestic installation |
| 01/20/1993 | EP0523629A1 Multipoint teleconference system employing H. 221 frames |