JPS6412636A - Loopback control system - Google Patents
Loopback control systemInfo
- Publication number
- JPS6412636A JPS6412636A JP62166922A JP16692287A JPS6412636A JP S6412636 A JPS6412636 A JP S6412636A JP 62166922 A JP62166922 A JP 62166922A JP 16692287 A JP16692287 A JP 16692287A JP S6412636 A JPS6412636 A JP S6412636A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- discrimination
- main
- fault
- main transmission
- 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
Abstract
PURPOSE:To contrive eliminate the need for a supervising device and to facilitate the entire constitution change and the extension by connecting plural communication equipments in a ring shape in a main transmission line and a sub transmission line in which the signal transmission direction is opposite to each other, using only the main transmission line in the normal state and using both the main and sub transmission lines if a fault takes place in the main transmission line. CONSTITUTION:In the event of a fault in a main transmission line 1, a master station 3a applies transmission/reception of a test signal to both adjacent slave stations 3b, 3d individually, the slave stations adjacent to each other (3b-3d) apply the transmission/reception of a test signal sequentially individually, a fault location is discriminated based on the result and loopback connection is applied in response to the discrimination. Thus, the discrimination of the fault location and the discrimination as to whether the loopback connection is applied or not are implemented by each station independently. Thus, no monitor is required and the extension and configuration change as the whole system are facilitated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62166922A JPS6412636A (en) | 1987-07-06 | 1987-07-06 | Loopback control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62166922A JPS6412636A (en) | 1987-07-06 | 1987-07-06 | Loopback control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6412636A true JPS6412636A (en) | 1989-01-17 |
Family
ID=15840141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62166922A Pending JPS6412636A (en) | 1987-07-06 | 1987-07-06 | Loopback control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412636A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05102990A (en) * | 1991-06-27 | 1993-04-23 | Nec Corp | Transmission line switching system |
JP2008017263A (en) * | 2006-07-07 | 2008-01-24 | Oki Electric Ind Co Ltd | Communication network |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756060B2 (en) * | 1975-10-24 | 1982-11-27 | ||
JPS59122029A (en) * | 1982-12-21 | 1984-07-14 | Fujitsu Ltd | Fault monitoring system |
JPS59148450A (en) * | 1983-02-14 | 1984-08-25 | Mitsubishi Electric Corp | Data transmitter |
-
1987
- 1987-07-06 JP JP62166922A patent/JPS6412636A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756060B2 (en) * | 1975-10-24 | 1982-11-27 | ||
JPS59122029A (en) * | 1982-12-21 | 1984-07-14 | Fujitsu Ltd | Fault monitoring system |
JPS59148450A (en) * | 1983-02-14 | 1984-08-25 | Mitsubishi Electric Corp | Data transmitter |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05102990A (en) * | 1991-06-27 | 1993-04-23 | Nec Corp | Transmission line switching system |
JP2008017263A (en) * | 2006-07-07 | 2008-01-24 | Oki Electric Ind Co Ltd | Communication network |
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