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Class Information
Number: 379/262
Name: Telephonic communications > Centralized switching system > Switching controlled in response to called station addressing signal > With operator position or completion of call (e.g., dial "o", semiautomatic) > Call extension by operator
Description: Subject matter where the operator dials the called station address.

Sub-classes under this class:

Class Number Class Name Patents
379/264 A to b operator 15
379/263 With call indicator or announcer 18

Patents under this class:

Patent Number Title Of Patent Date Issued
8090090 Method and apparatus for monitoring telephonic members and providing directory assistance Jan. 3, 2012
6611585 Method and apparatus for intelligent release link trunk Aug. 26, 2003
6072463 Workstation conference pointer-user association mechanism Jun. 6, 2000
5422944 Attendant console sharing system and method in centrex Jun. 6, 1995
5117454 Exchange having a display apparatus for displaying calls terminated at an attendant console May. 26, 1992
4153818 Telephone multiline signaling using common signal pair May. 8, 1979

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