JPS5765034A - Loop back system in closed loop transmission ystem - Google Patents
Loop back system in closed loop transmission ystemInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Small-Scale Networks (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
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.
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)
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)
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 |
-
1980
- 1980-10-09 JP JP14050580A patent/JPS5765034A/en active Pending
Patent Citations (2)
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)
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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