H04M 3 - Automatic or semi-automatic exchanges

Patents for H04M 3 - Automatic or semi-automatic exchanges (99,881)
12/1986
12/10/1986	EP0204675A2 Modular distribution frame including protector modules adapted for break access testing
12/10/1986	EP0203938A1 Interswitch line circuit
12/10/1986	CN85109245A Telephone line status circuit
12/09/1986	US4628505 Signaling terminal system for CCITT No. 7 common channel signaling system
12/09/1986	US4628315 Addressable transducer with improved address signal processing
12/09/1986	US4628158 Stored program controller
12/09/1986	CA1215159A1 Programmable cartridge telephone communication system
12/03/1986	EP0203455A1 Subscriber line monitoring circuit
12/02/1986	US4626633 In-line switched telephone line tester
12/02/1986	US4626632 Maintenance termination unit
12/02/1986	US4626630 Telephone call forwarding device
12/02/1986	US4626628 Telephone line circuit having time-shared DTMF receivers
12/02/1986	US4626627 Telephone line selector for use with a PBX
12/02/1986	US4626625 Telecommunications system, particularly a telephone exchange system, having overload protected sequential logic systems
12/02/1986	US4626624 Telecommunications system, particularly a telephone exchange system, having overload protected sequential logic systems
11/1986
11/26/1986	EP0202648A2 Digital network system having arrangement for testing digital subscriber line
11/26/1986	EP0202422A2 Adaptive trunk-compression system
11/25/1986	US4625081 Automated telephone voice service system
11/25/1986	CA1214581A1 Ringing signal transmission system for radiotelephone system
11/20/1986	WO1986006901A1 Operator communication arrangements for operator assistance systems
11/20/1986	WO1986006900A1 Agent communication arrangements for telecommunication systems
11/20/1986	EP0201734A1 Device at a telephone subscriber terminal for disconnecting one out of two alternately and automatically connectable substations by the exchange in case of an undesired loop closure in one of these substations
11/20/1986	EP0201635A1 Telecommunication line circuit
11/19/1986	CN85103684A Switching system and method of network having a pluralities of terminal control eqipment units
11/18/1986	US4623761 Telephone operator voice storage and retrieval system
11/18/1986	US4623760 Signaling protocol interface channel unit
11/12/1986	CN86101238A Voice synthesis module
11/12/1986	CN86101057A Method and apparatus for efficient resource allocation
11/12/1986	CA1213992A Method and circuitry for encoding telephone ringing signals
11/12/1986	CA1213991A Apparatus for automatically checking the correspondence between the numerical codes of telephone subscribers and the different transmission and distribution indentification codes of the telephone pair assigned to each subscriber
11/11/1986	US4622439 Detection of ground or loop start configuration in telephone loop signalling circuit
11/11/1986	US4622438 Subscriber line radio concentration system with automatic response for a loop back test
11/06/1986	WO1986006569A1 Method and apparatus for efficient resource allocation
11/06/1986	WO1986004763A3 Controlling multi-port hunt groups in a distributed control switching system
11/05/1986	EP0200038A2 Method and apparatus for determining the values of analogous voltages appearing in subscriber lines of a digital telephone switching system
11/05/1986	EP0199933A1 Circuit arrangement for telecommunication exchnages, especially telephone exchanges in which individual apparatuses are controlled by a central switching control
11/05/1986	EP0199865A1 Active impedance transformer-assisted line feed circuit with filtering function of supervision signals
11/04/1986	US4621354 DTMF receiver sense and control maintenance arrangement
10/1986
10/29/1986	EP0199420A1 Electronic contact with associated power limiting means
10/29/1986	EP0199255A2 Equipment for sending digitally pre-stored voice announcements to the subscribers connected to a telephone network
10/29/1986	EP0198906A1 Method and apparatus for testing remote communication systems
10/29/1986	CN85104799A Receiving system of keyed fast-pulse dialing electronic telephone
10/28/1986	US4620070 Telephone line tester
10/28/1986	US4620069 Method and apparatus to determine whether a subscriber line is loaded or non-loaded
10/28/1986	US4620066 Method and apparatus for sharing operators among assistance systems
10/22/1986	EP0198178A2 Method for testing telephone sets, line paths and parts of the control of telephone exchanges, especially private telephone exchanges
10/22/1986	EP0198176A2 Method for informing a telephone subscriber of the existing states of his connection
10/22/1986	EP0197950A1 Telephone switching system switch processor interface
10/22/1986	CN86101287A Processing sequence calls in a distributed control switching system
10/21/1986	US4618743 For use with a telephone circuit
10/21/1986	CA1213026A1 Electronic audio communication system with user controlled message address
10/15/1986	EP0197648A2 Method and apparatus for generating computer-controlled interactive voice services
10/15/1986	EP0197313A2 Method for storing voice information intended for a subscriber of a communication system in a central memory unit
10/15/1986	EP0197312A1 Circuit operation method for telecommunication exchanges, especially telephone exchanges with subexchanges, especially concentrators connected to exchanges by connection channels
10/15/1986	EP0113349B1 Automated data acquisition and analysis
10/15/1986	EP0110964B1 Automatic interactive conference arrangement
10/15/1986	CN86100949A Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
10/14/1986	US4617663 Interface testing of software systems
10/14/1986	CA1212792A1 Method of and apparatus for voice communication storage and forwarding with simultaneous access to multiple users
10/14/1986	CA1212747A1 Voice and data combining and pabx incorporating same
10/08/1986	EP0196781A2 Method & apparatus for automatically transmitting a message to a telephone terminal
10/07/1986	CA1212441A1 Conference control transfer arrangement
10/01/1986	EP0128942B1 Method of detecting hazardous line voltages over a two-wire line
09/1986
09/30/1986	US4615028 Switching system with separate supervisory links
09/30/1986	US4614844 Telephone service checking terminal
09/30/1986	US4614842 Secretarial telephone station with distributed processing for use with a secretarial answering system
09/30/1986	US4614840 Telecommunication line circuit and associated polarity reversal circuit
09/25/1986	WO1986004740A3 Processing sequence calls in a distributed control switching system
09/24/1986	EP0195587A2 Parallel call processing system and method
09/24/1986	EP0195272A2 Voice mail system on audio tape
09/24/1986	CN86101707A Distribution control mode electronic switch system
09/23/1986	US4613729 Telecommunications system, particularly a telephone exchange system having overload-protected sequential logic systems
09/23/1986	CA1211823A1 Method of and arrangement for establishing a conference connection in a tdm communication system
09/22/1986	EP0179898A4 A two way personal message system with extended coverage.
09/17/1986	EP0194491A2 Telecommunication exchange for speech and data
09/17/1986	CN85109222A Interswitch line circuit
09/16/1986	US4612421 Method of and test arrangement for testing the transmission path within an apparatus of a modular construction for interruptions
09/16/1986	US4612416 In a business communication system
09/10/1986	EP0194004A2 Voice synthesis module
09/10/1986	EP0193906A1 A reconfigurable high-speed integrated local network
09/10/1986	EP0193764A2 Method for recording speech communication in a central memory
09/10/1986	CN86101257A Wide-band synthetical switchboard for optical-fibre communication-network
09/10/1986	CN85109293A Data service system for transfer and conversion
09/10/1986	CN85109286A Multi-purpose speech-sound/data system
09/09/1986	US4611320 Programmable testing analyzer
09/09/1986	US4611101 Method and apparatus for testing communication systems
09/09/1986	US4611095 Telephone conference bridge system
09/09/1986	US4611094 Method for customer definable telephone capability
09/09/1986	CA1211240A1 Ring trip detection system
09/09/1986	CA1211193A1 Data capture arrangement for a conference circuit
09/09/1986	CA1211192A1 Time shared conference arrangement
09/09/1986	CA1211191A1 Arrangement for subscriber line verification and ring testing
09/09/1986	CA1211190A1 Arrangement for single line testing
09/09/1986	CA1211189A1 Arrangement for subscriber line ring testing
09/09/1986	CA1211188A1 Test data insertion arrangement for a conference circuit
09/03/1986	EP0193409A2 Integrated digital circuit for processing speech signal
09/03/1986	EP0193244A2 Polarity reversal circuit
09/03/1986	EP0193134A2 Switching system with a digital switching network, and subsriber interface therefor
09/03/1986	EP0193049A2 Level control method for signal information
09/03/1986	EP0192894A2 Integrated office automation system

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