Title:
AUTOMATIC TELEPHONE EXCHANGE TRUNK CLOSING SYSTEM
Document Type and Number:
Japanese Patent JPS5233407
Kind Code:
A
Abstract:
PURPOSE: Switching on and off for a communicating line can simply be performed by utilizing a combination of micro-switches and packages.
Inventors:
OOTAKA YUKIO
NAKAMURA TADASHI
NAKAMURA TADASHI
Application Number:
JP10903275A
Publication Date:
March 14, 1977
Filing Date:
September 10, 1975
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04M3/08; H04M3/12; H04M3/22; H04Q1/02; H04Q1/08; H04Q1/20; H04Q3/42; (IPC1-7): H04M3/12; H04Q1/08