in systems involving main and subordinate switching centres

Industry

CPC
H04M7/14

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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M7/00Interconnection arrangements between switching centres

Current Industry

H04M7/14in systems involving main and subordinate switching centres

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Virtual PBX based on feature server modules
- Patent number 8,279,857
- Issue date Oct 2, 2012
- Resource Consortium Limited
- Shigeaki Hakusui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual PBX based on feature server modules
- Patent number 7,746,848
- Issue date Jun 29, 2010
- Resource Consortium Limited
- Shigeaki Hakusui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for selecting impedance setting for loop start trunk line
- Patent number 7,738,653
- Issue date Jun 15, 2010
- Mitel Networks Corporation
- Yonghua Fang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switch proxy for providing emergency stand alone service in remote...
- Patent number 7,680,252
- Issue date Mar 16, 2010
- Aztek Engineering, Inc.
- Joseph Marcus Elder
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of selecting impedance setting for loop start trunk line
- Patent number 7,215,762
- Issue date May 8, 2007
- Mitel Networks Corporation
- Yonghua Fang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interconnecting voice-over-packet and analog telephony at a desktop
- Patent number 7,009,961
- Issue date Mar 7, 2006
- Telcordia Technologies, Inc.
- Stanley Pietrowicz
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for automatic detection of loop start and ground...
- Patent number 6,707,887
- Issue date Mar 16, 2004
- Siemens Information and Communication Networks, Inc.
- Bertram Geck
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface device for communication between an external network subs...
- Patent number 6,658,101
- Issue date Dec 2, 2003
- France Telecom
- Serge Calvez
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Suppressed ringing connectivity
- Patent number 6,633,637
- Issue date Oct 14, 2003
- Lucent Technologies Inc.
- Stuart Mandel Garland
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of monitoring digital line signal in private exchange system
- Patent number 6,625,269
- Issue date Sep 23, 2003
- Samsung Electronics Co., Ltd.
- Hong-Han Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for establishing a call path through a private ne...
- Patent number 6,442,256
- Issue date Aug 27, 2002
- Lucent Technologies Inc.
- Stuart M. Garland
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for teleworking from remote terminals
- Patent number 5,991,390
- Issue date Nov 23, 1999
- British Telecommunications public limited company
- Laurence J. Booton
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Device for inducing a wink in a telephone system
- Patent number 5,953,390
- Issue date Sep 14, 1999
- Southwestern Bell Telephone Company
- Gregory David Olson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for personal paging a telephone private branch exchange with...
- Patent number 5,151,930
- Issue date Sep 29, 1992
- Siemens Aktiengesellschaft
- Ernst Hagl
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface to and operation of a voice messaging system
- Patent number 5,117,451
- Issue date May 26, 1992
- VMX/OPCOM
- David J. Ladd
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for the billing of value-added communication c...
- Patent number 5,003,584
- Issue date Mar 26, 1991
- AT&T Bell Laboratories
- Irving Benyacar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line switching apparatus and method
- Patent number 4,991,203
- Issue date Feb 5, 1991
- Canon Kabushiki Kaisha
- Katsuhiro Kakizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of making call-wait and call-alternation in electronic priva...
- Patent number 4,975,944
- Issue date Dec 4, 1990
- Samsung Electronics Co., Ltd.
- Seung-Hwan Cho
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
PBX voice mail interface
- Patent number 4,930,153
- Issue date May 29, 1990
- Nicollet Technologies, Inc.
- Guenter E. Hagedorn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface to and operation of a voice messaging system
- Patent number 4,926,462
- Issue date May 15, 1990
- VMX/OPCOM
- David J. Ladd
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Universal PBX interface
- Patent number 4,914,690
- Issue date Apr 3, 1990
- Nicollet Technologies, Inc.
- Guenter E. Hagedorn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Virtual PBX based on Feature Server Modules
- Publication number 20130003723
- Publication date Jan 3, 2013
- Resource Consortium Limited
- Shigeaki Hakusui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Virtual PBX based on Feature Server Modules
- Publication number 20100246575
- Publication date Sep 30, 2010
- Resource Consortium Limited
- Shigeaki Hakusui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD FOR SELECTING IMPEDANCE SETTING FOR LOOP START TRUNK LINE
- Publication number 20070127697
- Publication date Jun 7, 2007
- Mitel Networks Corporation
- Yonghua Fang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Virtual PBX based on feature server modules
- Publication number 20070047534
- Publication date Mar 1, 2007
- Shigeaki Hakusui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Switch proxy for providing emergency stand alone service in remote...
- Publication number 20060098791
- Publication date May 11, 2006
- Joseph Marcus Elder
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method of selecting impedance setting for loop start trunk line
- Publication number 20050207565
- Publication date Sep 22, 2005
- Mitel Networks Corporation
- Yonghua Fang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Interconnecting voice-over-packet and analog telephony at a desktop
- Publication number 20030026244
- Publication date Feb 6, 2003
- Stanley Pietrowicz
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
System and method for automatic detection of loop start and ground...
- Publication number 20020131560
- Publication date Sep 19, 2002
- Bertram Geck
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

in systems involving main and subordinate switching centres

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Virtual PBX based on feature server modules

Virtual PBX based on feature server modules

Method for selecting impedance setting for loop start trunk line

Switch proxy for providing emergency stand alone service in remote...

Method of selecting impedance setting for loop start trunk line

Interconnecting voice-over-packet and analog telephony at a desktop

System and method for automatic detection of loop start and ground...

Interface device for communication between an external network subs...

Suppressed ringing connectivity

Method of monitoring digital line signal in private exchange system

System and method for establishing a call path through a private ne...

Method and apparatus for teleworking from remote terminals

Device for inducing a wink in a telephone system

Method for personal paging a telephone private branch exchange with...

Interface to and operation of a voice messaging system

Method and apparatus for the billing of value-added communication c...

Line switching apparatus and method

Method of making call-wait and call-alternation in electronic priva...

PBX voice mail interface

Interface to and operation of a voice messaging system

Universal PBX interface

Patents Applicationslast 30 patents

Virtual PBX based on Feature Server Modules

Virtual PBX based on Feature Server Modules

METHOD FOR SELECTING IMPEDANCE SETTING FOR LOOP START TRUNK LINE

Virtual PBX based on feature server modules

Switch proxy for providing emergency stand alone service in remote...

Method of selecting impedance setting for loop start trunk line

Interconnecting voice-over-packet and analog telephony at a desktop

System and method for automatic detection of loop start and ground...