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Class Information
Number: 379/156
Name: Telephonic communications > Multi-line or key substation system with selective switching and central switching office connection
Description: Subject matter including circuitry for allowing a subscriber terminal to be selectively connected to one of a plurality of lines, at least one of which is a public telephone line.


Sub-classes under this class:

Class Number Class Name Patents
379/162 Detail of hold circuitry 83
379/166 Detail of line circuit or line card 76
379/164 Line status indication or call alerting 230
379/165 Switching or supervision feature (e.g., common control, digital) 254
379/161 With exclusion or priority feature (e.g., lockout or privacy) 69
379/159 With intercom system 109
379/157 With special service 203


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
7616626 Telephone exchange apparatus and control method for telephone exchange apparatus Nov. 10, 2009
7606351 Telephone number change notification method and telephone number change notification system Oct. 20, 2009
7570631 Cable telephony network supporting roaming VoIP terminals Aug. 4, 2009
7567656 Telephone communication apparatus Jul. 28, 2009
7529540 Method and system for invoking push-to-service offerings May. 5, 2009
7496186 Outside-LAN connectable IP key telephone system, terminal unit thereof, main unit thereof, and outside-LAN connecting method Feb. 24, 2009
7421526 Reconfigurable virtual backplane architecture Sep. 2, 2008
7418265 System and method for interrupt control on a handheld device Aug. 26, 2008
7321586 Method for establishing communication links in an exchange in a switching system Jan. 22, 2008
7308086 Telephone communication apparatus Dec. 11, 2007
7301940 Dual-use packet/analog phone or phone-adapter in a packet telephony distribution system Nov. 27, 2007
7257211 Method and apparatus for controlling and/or monitoring a MULAP line Aug. 14, 2007
7200383 Subscriber authentication for unlicensed mobile access signaling Apr. 3, 2007
7194074 Key telephone system, key telephone, interface unit, and transmission scheme determination method Mar. 20, 2007
7190778 Communication system and keyset therefore capable of identifying selected user locations Mar. 13, 2007
7139375 Highway expansion apparatus for key telephone system and operation method thereof Nov. 21, 2006
7088807 Call pick-up system and method of a switching device Aug. 8, 2006
7050556 Key telephone unit and key telephone system May. 23, 2006
7013007 Computer telephony power supply method and apparatus Mar. 14, 2006
7010105 Format-converting device and private branch exchange system using the same, and format-converting method and memory medium storing a program to allow computer to execute the same method Mar. 7, 2006
7006614 Systems and methods for voice and data communications including hybrid key system/PBX functionality Feb. 28, 2006
7003081 Priority based methods and apparatus for transmitting accurate emergency location identification numbers (ELINs) from behind a multi-line telephone system (MLTS) Feb. 21, 2006
6980634 Telephone circuit controller apparatus Dec. 27, 2005
6978000 Key telephone system and interface unit for key telephone Dec. 20, 2005
6975713 Providing multiple line functionality using alternative network telephony Dec. 13, 2005
6891937 Method and apparatus for administration of circuit inventories in telecommunication networks May. 10, 2005
6882719 Method for providing outgoing call reservation service in exchange system Apr. 19, 2005
6876732 Service providing method for electronic device, customer center, and user system Apr. 5, 2005
6816589 Dynamic communications groups Nov. 9, 2004
6807262 Central office control of receive and transmit handset volume Oct. 19, 2004
6807261 Digital key telephone set and digital key telephone system Oct. 19, 2004
6801609 Telephone system with programmable line appearances Oct. 5, 2004
6697358 Emulation of phone extensions in a packet telephony distribution system Feb. 24, 2004
6674842 Multi-line telephone with input/output mixing and audio control Jan. 6, 2004
6668047 Key telephone system and maintenance method therefor Dec. 23, 2003
6661883 Method and apparatus allowing remote key system units to interoperate Dec. 9, 2003
6636586 Telephone set device capable of vocalizing a telephone number being called Oct. 21, 2003
6636595 Non-KSU message delivery system Oct. 21, 2003
6625269 Method of monitoring digital line signal in private exchange system Sep. 23, 2003
6591114 Fixed cellular communications system Jul. 8, 2003
6570976 Multimedia private branch exchanger and private branch exchange system May. 27, 2003
6560464 Telephone switching system and method May. 6, 2003
6553101 DOS-based card-type voice mail system Apr. 22, 2003
6522737 System and method of operation for a telecommunications patch system Feb. 18, 2003
6498842 Switching system between a call center and public network Dec. 24, 2002
6496576 Digital key telephone system and extension terminal device thereof Dec. 17, 2002
6493439 Analog caller identification transmission method and apparatus Dec. 10, 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

1 2 3 4


 
 
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