JPS55120240A - Supervisory signal transmission system - Google Patents

Supervisory signal transmission system

Info

Publication number
JPS55120240A
JPS55120240A JP2774679A JP2774679A JPS55120240A JP S55120240 A JPS55120240 A JP S55120240A JP 2774679 A JP2774679 A JP 2774679A JP 2774679 A JP2774679 A JP 2774679A JP S55120240 A JPS55120240 A JP S55120240A
Authority
JP
Japan
Prior art keywords
signal
supervisory
pulse
main
regenerates
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
JP2774679A
Other languages
English (en)
Inventor
Toshikatsu Yasuda
Yukio Minami
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 JP2774679A priority Critical patent/JPS55120240A/ja
Publication of JPS55120240A publication Critical patent/JPS55120240A/ja
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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/074—Monitoring an optical transmission system using a supervisory signal using a superposed, over-modulated signal
JP2774679A 1979-03-12 1979-03-12 Supervisory signal transmission system Pending JPS55120240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2774679A JPS55120240A (en) 1979-03-12 1979-03-12 Supervisory signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2774679A JPS55120240A (en) 1979-03-12 1979-03-12 Supervisory signal transmission system

Publications (1)

Publication Number Publication Date
JPS55120240A true JPS55120240A (en) 1980-09-16

Family

ID=12229588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2774679A Pending JPS55120240A (en) 1979-03-12 1979-03-12 Supervisory signal transmission system

Country Status (1)

Country Link
JP (1) JPS55120240A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961644A (en) * 1987-04-27 1990-10-09 British Telecommunications Public Limited Company Transmission line surveillance system measuring changes in phase of propagated signals
JPH05155423A (ja) * 1991-09-06 1993-06-22 Okumura Mach Corp 円錐台形状物の姿勢修正装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961644A (en) * 1987-04-27 1990-10-09 British Telecommunications Public Limited Company Transmission line surveillance system measuring changes in phase of propagated signals
JPH05155423A (ja) * 1991-09-06 1993-06-22 Okumura Mach Corp 円錐台形状物の姿勢修正装置

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