Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 7 - Arrangements for interconnection between switching centres
Patents for H04M 7 - Arrangements for interconnection between switching centres (24,777)
03/1993
03/16/1993US5195183 Data communication system with communicating and recharging docking apparatus for hand-held data terminal
03/16/1993US5195128 Communication system, particularly a telephone communication system
03/02/1993US5191507 Polarity inverting circuit
02/1993
02/24/1993EP0527855A1 Long distance telephone switching system with enhanced subscriber services
02/24/1993EP0527722A1 Data transmission arrangement.
02/18/1993WO1993003570A1 Transparent inband signaling
02/18/1993CA2114435A1 Transparent inband signaling
02/16/1993US5187735 Integrated voice-mail based voice and information processing system
01/1993
01/19/1993US5180232 Modular printer system
01/06/1993CN1067774A Method for performing continuity check in electronic exchange system
01/05/1993CA1312394C Carrier independent network services
12/1992
12/30/1992EP0520483A1 Method and arrangement for establishing telephone connections
12/09/1992CN1019442B Secondary dialling method within acoustic frequency band
12/01/1992US5168515 Switchless automatic call distribution system
11/1992
11/24/1992CA1310732C Routing of network traffic
11/11/1992EP0512787A2 Automatic communications device disablement
11/11/1992CA2063359A1 Automatic communications device disablement
11/05/1992DE4212102A1 Computergestuetztes fernsprechanwendungssystem Computergestuetztes automatic telephone application system
11/04/1992EP0511831A2 Multiple integration apparatus
11/04/1992EP0511295A1 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
10/1992
10/31/1992CA2067315A1 Multiple integrations unit
10/07/1992EP0507505A2 Network signalling arrangement for controlling tandem network functions
10/07/1992EP0507226A2 Protocol for transmitting messages in a network
10/07/1992EP0507125A2 Method and apparatus for addressing users in a network
09/1992
09/29/1992US5151936 Interface means
09/29/1992US5151935 Programmable universal signaling circuit for a telephone network
09/29/1992US5151930 Method for personal paging a telephone private branch exchange with the assistance of a personal paging device that offers mutually different operating modes for personal paging
09/23/1992EP0504757A2 Trunk line identification system
09/22/1992US5150405 Duplex structure signal transfer point system for common channel signalling system No. 7
09/16/1992EP0503059A1 Wide area audio response network
08/1992
08/11/1992US5138657 Method and apparatus for controlling a digital crossconnect system from a switching system
08/05/1992EP0497668A1 An optical time multiplexer and an optical time demultiplexer
08/04/1992US5136633 International authorization system
07/1992
07/30/1992CA2060114A1 Optoelectronic time division multiplexer and optoelectric time division demultiplexer
07/28/1992US5134647 Automatic voice/data messaging enhancements
07/21/1992US5133006 Combination interface circuit for coupling a digital loop carrier telephone system
07/15/1992EP0494298A1 Multi-level radio-frequency communication system.
07/14/1992US5130982 Fully shared communications network
07/08/1992EP0493703A1 Communication system especially telephone communication system
07/08/1992CN1017392B Comprehensive communication system for electric power dispatching
06/1992
06/24/1992EP0491244A2 Communication network with a plurality of communication exchanges
06/23/1992US5125027 Central office line interface circuit for an analog network private telephone installation
06/03/1992EP0488827A1 Interphone
06/02/1992US5119415 Method of displaying called party information on calling party terminal and communication network using the method
05/1992
05/26/1992US5117451 Interface to and operation of a voice messaging system
05/26/1992CA1301967C Multi-task state machine signalling translator
05/20/1992EP0486204A1 Apparatus and method to perform validation of credit cards in an ISDN network
05/14/1992WO1992008311A1 Location registration system for a personal communicator
05/12/1992US5113430 Enhanced wide area audio response network
05/06/1992EP0484067A2 Automatic system for forwarding of calls
05/06/1992EP0484051A2 Telephone interface circuit
05/06/1992EP0483458A2 Power reduction technique for a time slot interchanger in the subscriber interface
04/1992
04/28/1992CA1299709C Apparatus and method for providing existing telephone switching equipmentwith the capability of using the ss7 protocol
04/16/1992WO1992006548A1 Enhanced wide area audio response network
04/01/1992EP0478206A2 A procedure to initiate queuing in call processing
03/1992
03/11/1992CN2098770U Interface of program telephone
03/11/1992CN1059442A Automatic adaptor between attendant's desk
03/11/1992CN1059441A Duplex centerless frequency-division multiple access carrier telephone system
03/04/1992EP0447485A4 System for cross-connecting high speed digital signals
02/1992
02/26/1992CN2097486U Fully-automatic telephone exchanger device
02/19/1992EP0471216A2 Method for testing the line connection before switching-over from a telephone exchange which is to be disabled, to a new digital exchange ready to be put into operation
02/06/1992WO1992002084A1 Multi-level radio-frequency communication system
02/04/1992US5086460 Communications system ingress and egress arrangement
02/04/1992US5086348 System for connecting optical lines to a wideband telecommunications exchange
01/1992
01/26/1992CA2066587A1 Multi-level radio-frequency communication system
01/22/1992EP0467330A2 Signalling data receiving and processing unit provided in a broadband integrated services digital network
01/18/1992CA2047120A1 Signaling data receiving and processing unit provided in a broadband integrated services digital network
01/14/1992US5081641 Interconnecting and processing system for facilitating frequency hopping
12/1991
12/31/1991US5077735 Method and an apparatus for mutually converting different signaling systems
12/17/1991US5073890 Remote agent operation for automatic call distributors
12/10/1991CA1293070C Video and audio communication terminal, particularly a videophone, having a hinged case
12/03/1991US5070524 Telephone system
11/1991
11/27/1991CN1014950B System for connecting optical lines to wideband telecommunications exchanger
11/14/1991WO1991017618A1 Data transmission arrangement
11/05/1991US5063592 Control of non-locally switched telecommunication services
10/1991
10/31/1991WO1991016781A1 Telecommunications system with timed-do-not-disturb
10/31/1991WO1991016779A1 Long distance telephone switching system with enhanced subscriber services
10/31/1991DE4013387A1 Telephone system operation - in which main phone is controlled by central controller and extensions can be added by 4-line
10/30/1991CN1055848A Interconnecting and processing system for facilitating frequency hopping
10/24/1991CA2222659A1 Long distance telephone switching system with enhanced subscriber services
10/23/1991EP0452591A2 Method and apparatus for the billing of value-added communication calls
10/22/1991US5060255 Telecommunications system with timed-do-not-disturb
10/16/1991EP0451711A2 Self-diagnosis of loop start and ground start trunk interfaces
10/09/1991EP0450610A2 Telecommunications voice and data services network architecture
10/03/1991WO1991015073A1 Automatic voice/data messaging enhancements
09/1991
09/25/1991EP0447485A1 System for cross-connecting high speed digital signals
09/24/1991US5052020 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
09/17/1991CA1289283C Signal repeater for multi subscriber communication over single pair telephone line
09/10/1991US5048081 Arrangement for routing packetized messages
09/03/1991US5046181 Switching system with two-way line managing system
09/03/1991CA1288534C Inductance multiplier circuit
08/1991
08/27/1991CA1288154C Signal transfer arrangement
08/20/1991US5042062 Method and apparatus for providing real-time switching of high bandwidth transmission channels
08/13/1991US5040170 System for cross-connecting high speed digital signals
08/07/1991WO1991012681A1 Interconnecting and processing system for facilitating frequency hopping
08/07/1991EP0440515A1 International authorization system
08/06/1991US5038375 Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer
07/1991
07/30/1991CA1287152C Inter-network connection system
07/25/1991WO1991011065A1 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
07/25/1991CA2074169A1 Method of and apparatus for controlling modulation of digital signals in frequency modulated transmissions
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