| Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881) |
|---|
| 07/07/1993 | EP0550179A2 Redirection of calls by a communication terminal |
| 07/07/1993 | EP0550178A2 Telecommunication switching system having distributed dialing plan hierarchy |
| 07/07/1993 | EP0549690A1 System for distinguishing or counting spoken itemized expressions |
| 07/07/1993 | CN2137845Y Subscriber interface of telephone |
| 07/06/1993 | US5226151 Emergency resumption processing apparatus for an information processing system |
| 07/06/1993 | US5226077 Headset amplifier with automatic log on/log off detection |
| 07/06/1993 | CA1320002C Management system capable of quickly assigning a terminal endpoint identifier to a terminal equipment unit |
| 07/01/1993 | DE4142742A1 Telephone call diversion appts. independent of contractual regulation - incorporates signal transmission controller responsive to ringing- and dialling-tone detectors and dual-tone multifrequency receiver |
| 06/30/1993 | EP0549509A2 Automatic attribute assignment of multimedia distributions in a data processing system |
| 06/30/1993 | EP0549127A2 Common channel signaling message intercept system |
| 06/30/1993 | EP0549126A2 Method and apparatus for alerting multiple telephones for an incoming call |
| 06/30/1993 | EP0549124A2 Verification of subscriber lines prior to cutover to a new switching system |
| 06/30/1993 | EP0549053A1 Apparatus for switching data |
| 06/30/1993 | EP0548597A1 Method and system of delivering multimedia information to a user |
| 06/30/1993 | EP0525121A4 Distributed protocol for improving the survivability of telecommunications trunk networks |
| 06/30/1993 | CN1073816A Special telephone service accepting and processing station |
| 06/29/1993 | US5224153 Voice-data telephonic interface control system |
| 06/29/1993 | US5224146 Radio telephone system for calling a party at predetermined invervals until a response is received |
| 06/29/1993 | US5224012 Solid state station protectors |
| 06/29/1993 | US5223827 Process and apparatus for managing network event counters |
| 06/29/1993 | CA1319768C Channel redundancy in a digital loop carrier system |
| 06/24/1993 | WO1993012621A1 Intercom system |
| 06/24/1993 | WO1993012619A1 Feature control system utilizing design oriented state table language |
| 06/24/1993 | WO1993012605A1 Communication link checking method and apparatus |
| 06/24/1993 | WO1993012593A1 Isdn branch exchange |
| 06/24/1993 | DE4142615A1 Operating control installation for telecommunications network - uses control data for network subscribers held in plan data list during modification of network for subsequent transfer to actual data list |
| 06/24/1993 | DE4142550A1 Video conference system with central coupling bay - has central studio controlling coupling bay for transmission and reception of multiplex signals contg. video and audio information |
| 06/24/1993 | CA2085825A1 Data switching device |
| 06/23/1993 | EP0547780A2 Method and apparatus for monitoring a network for customer signaling during the term of a call |
| 06/23/1993 | EP0547329A2 Apparatus and method for monitoring power loss in a telecommunication system |
| 06/23/1993 | EP0547067A1 Alarm and test system for a digital main line. |
| 06/23/1993 | CN1073563A Automated audio/visual presentation |
| 06/23/1993 | CN1073552A Telecommunications terminal block |
| 06/22/1993 | US5222131 Telephone protector including removable fuse holder |
| 06/22/1993 | US5222128 Telecommunication disaster plan |
| 06/22/1993 | US5222125 System for providing personalized telephone calling features |
| 06/22/1993 | US5222124 PBX system communications device |
| 06/22/1993 | US5222123 Registration and automatic call redirecting for cordless telephone systems |
| 06/22/1993 | US5222120 Long distance telephone switching system with enhanced subscriber services |
| 06/22/1993 | US5222119 Communication system and a method, to detect a power exposure of a communication line |
| 06/22/1993 | US5222083 Call progress monitoring |
| 06/22/1993 | CA1319442C Applications processor for a craft access system |
| 06/21/1993 | CA2078714A1 Automated audio/visual presentation |
| 06/17/1993 | DE4141027A1 Telephone system for spoken information transmission - has intermediate local exchange, accessible by dialling access digit, which delivers spoken information, esp. advertising, and allows reconnection to public network on dialling access digit |
| 06/16/1993 | EP0546707A2 Passive optical communication network |
| 06/16/1993 | EP0546487A2 Overvoltage protection circuit for interface circuits |
| 06/16/1993 | EP0546467A2 Communication system |
| 06/16/1993 | EP0546151A1 Application modularity in telecommunications exchanges |
| 06/16/1993 | CN2136561Y Repeater for direct dialing by use of city telephones to unit's telephone exchange subscriber |
| 06/15/1993 | US5220596 Method and apparatus for propagating a network profile |
| 06/14/1993 | CA2085189A1 Circuit arrangement for protecting interface circuits against overvoltages |
| 06/10/1993 | WO1993011645A1 Improved call pacing with call termination prior to first ring in potential no operator condition |
| 06/10/1993 | WO1993011643A1 Telephone circuit to control off-hook status during receipt of caller-id signal |
| 06/10/1993 | WO1993011628A1 Telematic terminal with full or reduced wanted information bit rate |
| 06/10/1993 | WO1993011586A1 Gel filled electrical connector |
| 06/09/1993 | EP0545226A2 Simultaneous recorded voice delivery and computer data screen delivery to an agent station |
| 06/09/1993 | EP0544930A1 Method of tracing program paths in communication exchange programs |
| 06/09/1993 | CN1021183C Method of managing traffic flow in wideband integrated services digital telecommunications network, and network for implementing method |
| 06/08/1993 | US5218633 Enhanced access to telecommunications network |
| 06/08/1993 | US5218632 Flexible call detail recording system |
| 06/08/1993 | US5218631 Telephonic-interface game control system |
| 06/08/1993 | US5218627 Decentralized video telecommunication system |
| 06/08/1993 | US5218616 Telephone line tester |
| 06/02/1993 | EP0544635A2 A method and arrangement for performance monitoring in a telecommunication network |
| 06/01/1993 | US5216708 Calling signal controller |
| 06/01/1993 | US5216702 Nonintrusive speech level and dynamic noise measurements |
| 06/01/1993 | US5216517 Communication terminal apparatus |
| 05/27/1993 | WO1993010616A1 Personal locator and call forwarding |
| 05/27/1993 | WO1993010614A1 Security systems based on recording unique identifier for subsequent playback |
| 05/26/1993 | EP0543235A2 Call transfers by voice messaging systems (VMS) integrated to a private branch exchange |
| 05/26/1993 | EP0543161A2 Method and circuit device for measuring operation paramaters of an interface circuit and a telephone subscriber line connected thereto |
| 05/26/1993 | CN2134757Y Full automatic phonic guide central exchange |
| 05/25/1993 | US5214692 Bypass for telephone switching system |
| 05/25/1993 | US5214691 Key telephone system with virtual private lines |
| 05/25/1993 | US5214689 Interactive transit information system |
| 05/25/1993 | US5214688 Method and apparatus for dynamic and interdependent processing of inbound calls and outbound calls |
| 05/25/1993 | CA1318382C Programmable conferencing module for ring arrays and switchable ring array networks |
| 05/19/1993 | EP0542628A2 Speech synthesis system |
| 05/19/1993 | EP0542049A2 An interactive telephone |
| 05/19/1993 | CN2134006Y Automatic alarm for multi-channel secrecy telephone net |
| 05/19/1993 | CN2134005Y 100 bronches full-automatic party-line secrecy telephone apparatus |
| 05/19/1993 | CN1020838C Access network for cordless telephone service |
| 05/18/1993 | US5212727 In a telecommunications system |
| 05/18/1993 | US5212726 Method of combining signals in a telephone conference circuit |
| 05/18/1993 | US5212722 Hands-free telephone having a handset volume attenuator for controlling speaker volume in a hands-free adaptor |
| 05/18/1993 | US5212475 Method for generating an alarm inhibit signal |
| 05/18/1993 | US5210937 Method of forming a telephone line overvoltage protection device |
| 05/18/1993 | CA2032216C Method for avoiding call blocking |
| 05/18/1993 | CA1318036C Method for confirming selected activities by recipients of electronic mail |
| 05/13/1993 | WO1993009630A1 Communication line monitoring system |
| 05/13/1993 | WO1993009628A1 Function testing system for a communications installation |
| 05/13/1993 | WO1993009611A1 A method of converging an echo canceller |
| 05/13/1993 | WO1993009610A1 An arrangement for the control of an echo canceller |
| 05/13/1993 | DE4136817A1 Funktionspruefsystem fuer eine kommunikationsanlage Funktionspruefsystem for a communication system |
| 05/12/1993 | EP0541435A1 System and method of detecting unauthorized use of identifiers for computer access |
| 05/12/1993 | EP0541145A1 Monitoring system for monitoring a telecommunication network containing one or more subscriber exchanges |
| 05/12/1993 | EP0540538A1 Method of controlling a digital coupling-field store |
| 05/11/1993 | US5210794 Apparatus and method for establishing crypto conferences on a telecommunications network |
| 05/11/1993 | US5210789 Interactive telephone operator terminal |
| 05/11/1993 | CA1317658C Individual subchannel loopback in the pcm interfaces of a digital telephone exchange with control of the outbound path |