JPS54139419A - Switching system for double-system transmission line - Google Patents

Switching system for double-system transmission line

Info

Publication number
JPS54139419A
JPS54139419A JP4659778A JP4659778A JPS54139419A JP S54139419 A JPS54139419 A JP S54139419A JP 4659778 A JP4659778 A JP 4659778A JP 4659778 A JP4659778 A JP 4659778A JP S54139419 A JPS54139419 A JP S54139419A
Authority
JP
Japan
Prior art keywords
transmission
station
fault
self
perform
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
JP4659778A
Other languages
Japanese (ja)
Inventor
Hisanori Miyagaki
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 JP4659778A priority Critical patent/JPS54139419A/en
Publication of JPS54139419A publication Critical patent/JPS54139419A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To enhance the maintenance performance by providing the function which decides whether the fault of the transmission system itself is caused by the fault at the transmission part of the station when some fault takes place at the transmission system. CONSTITUTION:Double-system transmission lines 4 and 5 are used for the signal transmission among plural units of transfer station 6. In such transmission system, transmission control station A and B are connected to line 4 and 5, and either one of the stations is actuated as the main system with the other station set for the holding system each usually. And receiver 9 to perform the signal transfer, driver 10, transmission circuit 11 to perform the parallel or temporary memorization of the signals, and monitor switch circuit 26 to perform constant monitor for the presence or absence of the transmission signal are installed to station 6. Then the function to give a periodical monitoring to the transmission signals is provided along with the function to perform the self-diagnosis by cutting off relay 21 of the self-station when the abnormal transmission signal is detected. Thus, lines 4 and 5 are cut off by relay 20 in case the self-station is decided abnormal and connected together again when the self-station is decided normal respectively. And lines 4 and 5 are switched to the holding system when the fault is detected again at the monitor period following the fault detection.
JP4659778A 1978-04-21 1978-04-21 Switching system for double-system transmission line Pending JPS54139419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4659778A JPS54139419A (en) 1978-04-21 1978-04-21 Switching system for double-system transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4659778A JPS54139419A (en) 1978-04-21 1978-04-21 Switching system for double-system transmission line

Publications (1)

Publication Number Publication Date
JPS54139419A true JPS54139419A (en) 1979-10-29

Family

ID=12751701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4659778A Pending JPS54139419A (en) 1978-04-21 1978-04-21 Switching system for double-system transmission line

Country Status (1)

Country Link
JP (1) JPS54139419A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60103955U (en) * 1983-12-21 1985-07-16 横河電機株式会社 multiplex communication device
JPH0868104A (en) * 1994-08-30 1996-03-12 Shinji Ueno Opening/closing device for sewage drain pipe tip opening section
US6385166B1 (en) 1997-07-23 2002-05-07 Denso Corporation Multiplex communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60103955U (en) * 1983-12-21 1985-07-16 横河電機株式会社 multiplex communication device
JPH0868104A (en) * 1994-08-30 1996-03-12 Shinji Ueno Opening/closing device for sewage drain pipe tip opening section
US6385166B1 (en) 1997-07-23 2002-05-07 Denso Corporation Multiplex communication system

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