Centralized switching system > With line-signal control > Patents

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Class Information
Number: 379/315
Name: Telephonic communications > Centralized switching system > With line-signal control
Description: Subject matter having a switchboard with a line condition responsive indicator and controlled in response to an operator"s action on the call connection.

Sub-classes under this class:

Class Number	Class Name	Patents
379/318	Central power source	2
379/317	Relay cut-off	1
379/316	Spring-jack cut-off	8

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7570951	Neighbor-assisted handover in mobile communications systems	Aug. 4, 2009
4489221	Telephone line/subscriber equipment disconnect apparatus	Dec. 18, 1984
4007337	Arrangement and method of achieving a dial pulse muting function in a register sender PABX system	Feb. 8, 1977