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Browse by Category: Main > Communications
Class Information
Number: 379/165
Name: Telephonic communications > Multi-line or key substation system with selective switching and central switching office connection > Switching or supervision feature (e.g., common control, digital)
Description: Subject matter which provides for connection control or signalling within a telephone key system.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8588388 Telephone system and server apparatus and control method used in telephone system Nov. 19, 2013
8457181 Rate agile rate-adaptive digital subscriber line Jun. 4, 2013
8155292 Telephone system and server apparatus Apr. 10, 2012
8144854 Conference bridge which detects control information embedded in audio information to prioritize operations Mar. 27, 2012
8085758 Methods and apparatus for controlling call admission to a network based on call peers Dec. 27, 2011
8081778 VOX circuit with 2-wire interfaces Dec. 20, 2011
8054959 Telephone exchange apparatus and incoming call transfer control method of the apparatus Nov. 8, 2011
7761086 Communication terminal, service providing equipment, common setup information management equipment, and communication control method Jul. 20, 2010
7756260 Method for providing features to the user of a telephone, a central unit and a telecommunication system therefor Jul. 13, 2010
7724883 Telephone system for communication through multiple lines May. 25, 2010
7672438 Providing multiple line functionality using alternative network telephony Mar. 2, 2010
7643624 Remote line access for a multi-line residential telephone Jan. 5, 2010
7616626 Telephone exchange apparatus and control method for telephone exchange apparatus Nov. 10, 2009
7567656 Telephone communication apparatus Jul. 28, 2009
7421071 Call progress tone generation in a communication system Sep. 2, 2008
7415103 Method and configuration for controlling and/or monitoring a terminal connected to a communications system Aug. 19, 2008
7308086 Telephone communication apparatus Dec. 11, 2007
7289615 Private branch exchange and private branch exchange control method Oct. 30, 2007
7248679 Apparatus and method for transmitting-receiving CID in a PBX Jul. 24, 2007
7245607 Apparatus and method for telephony feature access and gatekeeper policy interaction on combined ToL/PBX systems Jul. 17, 2007
7203304 Call progress tone generation in a communication system Apr. 10, 2007
7194074 Key telephone system, key telephone, interface unit, and transmission scheme determination method Mar. 20, 2007
7139375 Highway expansion apparatus for key telephone system and operation method thereof Nov. 21, 2006
7113587 Method and apparatus for non-disruptive telecommunication loop condition determination Sep. 26, 2006
7069047 System and method for on-line insertion of line replaceable units in wireless and wireline access systems Jun. 27, 2006
7050556 Key telephone unit and key telephone system May. 23, 2006
7050564 Call progress tone generation in a communication system May. 23, 2006
7006614 Systems and methods for voice and data communications including hybrid key system/PBX functionality Feb. 28, 2006
6990183 Multiple platform voice processing system with optimized resource allocation Jan. 24, 2006
6978008 Zero crossing detection circuit Dec. 20, 2005
6975713 Providing multiple line functionality using alternative network telephony Dec. 13, 2005
6952468 Method for providing call-connected party's information in private exchange network Oct. 4, 2005
6882715 Method and apparatus for communication with a gate entry controller and providing secure communication Apr. 19, 2005
6876732 Service providing method for electronic device, customer center, and user system Apr. 5, 2005
6836543 Operating surface for class functions in a telephone Dec. 28, 2004
6807261 Digital key telephone set and digital key telephone system Oct. 19, 2004
6807262 Central office control of receive and transmit handset volume Oct. 19, 2004
6661883 Method and apparatus allowing remote key system units to interoperate Dec. 9, 2003
6650744 Method and apparatus for broadcasting audio in a communication system Nov. 18, 2003
6633631 Digital key telephone system and extension terminal device thereof Oct. 14, 2003
6625272 Telemanagement system with single point of entry Sep. 23, 2003
6625269 Method of monitoring digital line signal in private exchange system Sep. 23, 2003
6496576 Digital key telephone system and extension terminal device thereof Dec. 17, 2002
6490346 Apparatus and method for providing music-on-hold service in key telephone system Dec. 3, 2002
6477248 Multi-line station interface Nov. 5, 2002
6459781 Key telephone apparatus with call distribution function Oct. 1, 2002
6456705 Digital key telephone system and extension terminal device thereof Sep. 24, 2002
6430280 Telephone main unit and telephone control apparatus Aug. 6, 2002
6421436 Multiline telephone apparatus Jul. 16, 2002
6411700 Telemanagement system with single point of entry Jun. 25, 2002

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