JPS5765034A - Loop back system in closed loop transmission ystem - Google Patents

Loop back system in closed loop transmission ystem

Info

Publication number
JPS5765034A
JPS5765034A JP14050580A JP14050580A JPS5765034A JP S5765034 A JPS5765034 A JP S5765034A JP 14050580 A JP14050580 A JP 14050580A JP 14050580 A JP14050580 A JP 14050580A JP S5765034 A JPS5765034 A JP S5765034A
Authority
JP
Japan
Prior art keywords
transmission line
station
transmission
signals
receiver
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
JP14050580A
Other languages
Japanese (ja)
Inventor
Yoshihiko Nishida
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.)
Fuji Facom Corp
Original Assignee
Fuji Facom Corp
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 Fuji Facom Corp filed Critical Fuji Facom Corp
Priority to JP14050580A priority Critical patent/JPS5765034A/en
Publication of JPS5765034A publication Critical patent/JPS5765034A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Abstract

PURPOSE:To realize the loop back system with a simple method without adding special signals, by constituting the transmission line of a normal system signal path transmitting information signals mainly and a spare system transmission path transmitting discriminating signals mainly toward opposite direction to the information sigals. CONSTITUTION:A plurality of transmission/reception stations ST1-ST6 having a communication controller C are connected in cascade. The transmission line connecting the transmitter T and the receiver R of the stations ST1-ST6 consists of a normal system transmission line A transmitting information signals and a spare system transmission line B mainly transmitting identification signals toward opposite direction to the transmission line A. If the disconnection of line is taken place at X-marked position on the transmission line A, the failure is detected at the receiver R of the normal system of the station ST1, the status of the station ST1 is changed, and the receiver R of the spare system of the station ST6 detects the failure from the result of this change to change the status of the station ST6, allowing to achieve the loop back path.
JP14050580A 1980-10-09 1980-10-09 Loop back system in closed loop transmission ystem Pending JPS5765034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14050580A JPS5765034A (en) 1980-10-09 1980-10-09 Loop back system in closed loop transmission ystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14050580A JPS5765034A (en) 1980-10-09 1980-10-09 Loop back system in closed loop transmission ystem

Publications (1)

Publication Number Publication Date
JPS5765034A true JPS5765034A (en) 1982-04-20

Family

ID=15270198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14050580A Pending JPS5765034A (en) 1980-10-09 1980-10-09 Loop back system in closed loop transmission ystem

Country Status (1)

Country Link
JP (1) JPS5765034A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180249A (en) * 1984-01-19 1985-09-14 バロース・コーポレーシヨン Method of operating station having two input-output ports in communication network

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136505A (en) * 1976-05-11 1977-11-15 Oki Electric Ind Co Ltd Automatic fault restoration system for loop transmission system
JPS5553943A (en) * 1978-10-17 1980-04-19 Nec Corp Folded connection control system for loop transmission line

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136505A (en) * 1976-05-11 1977-11-15 Oki Electric Ind Co Ltd Automatic fault restoration system for loop transmission system
JPS5553943A (en) * 1978-10-17 1980-04-19 Nec Corp Folded connection control system for loop transmission line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180249A (en) * 1984-01-19 1985-09-14 バロース・コーポレーシヨン Method of operating station having two input-output ports in communication network
JPH0443455B2 (en) * 1984-01-19 1992-07-16 Unisys Corp

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