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Title:
OPTICAL COMMUNICATION SWITCHING TRANSMISSION SYSTEM
Document Type and Number:
Japanese Patent JPS5732150
Kind Code:
A
Abstract:

PURPOSE: To improve the reliability of a system by providing an optical switch for transmission-line switching between an optical transmitter-receiver and an optical branching and mixing device which are constituent elements of each terminal station.

CONSTITUTION: At a terminal station A of multiple constitution, an optical switch 8a is provided between optical transmitters 1 and 2, and an optical branching device 3 having an optical mixing function. At a terminal station B, an optical switch 8b is also provided between optical transmitters 1 and 2, and an optical mixing device 3 having an optical mixing functon. If a fault occurs to either one of optical fibers 4 and 7 as an optica transmission line, the device is so constituted that the transmission-line is switched to the other optical fiber side on whch a fault is not generated.


Inventors:
OOTA KOUICHI
Application Number:
JP10719180A
Publication Date:
February 20, 1982
Filing Date:
August 06, 1980
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H04B10/03; H04B1/74; H04B10/032; H04B10/079; (IPC1-7): H04B9/00