JPS5433602A - Photo transmission system - Google Patents

Photo transmission system

Info

Publication number
JPS5433602A
JPS5433602A JP9955977A JP9955977A JPS5433602A JP S5433602 A JPS5433602 A JP S5433602A JP 9955977 A JP9955977 A JP 9955977A JP 9955977 A JP9955977 A JP 9955977A JP S5433602 A JPS5433602 A JP S5433602A
Authority
JP
Japan
Prior art keywords
transmission system
photo transmission
duplex
spare
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9955977A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kudo
Kazuhiro Sano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9955977A priority Critical patent/JPS5433602A/en
Publication of JPS5433602A publication Critical patent/JPS5433602A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To lengthen the life of the entire duplex system and to obtain high reliability, by avoiding temporary failure in selecting the spare system and extending the operation time after the changeover to the spare system, in a duplex photo transmission system through normal parallel transmission and selective reception.
JP9955977A 1977-08-22 1977-08-22 Photo transmission system Pending JPS5433602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9955977A JPS5433602A (en) 1977-08-22 1977-08-22 Photo transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9955977A JPS5433602A (en) 1977-08-22 1977-08-22 Photo transmission system

Publications (1)

Publication Number Publication Date
JPS5433602A true JPS5433602A (en) 1979-03-12

Family

ID=14250496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9955977A Pending JPS5433602A (en) 1977-08-22 1977-08-22 Photo transmission system

Country Status (1)

Country Link
JP (1) JPS5433602A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH025949U (en) * 1988-06-27 1990-01-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH025949U (en) * 1988-06-27 1990-01-16

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