JPS574623A - Fault monitoring system for cable relaying communication system - Google Patents
Fault monitoring system for cable relaying communication systemInfo
- Publication number
- JPS574623A JPS574623A JP7803380A JP7803380A JPS574623A JP S574623 A JPS574623 A JP S574623A JP 7803380 A JP7803380 A JP 7803380A JP 7803380 A JP7803380 A JP 7803380A JP S574623 A JPS574623 A JP S574623A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- circuit
- faulty
- detection signal
- output
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To perform a real-time monitor for a faulty relay, by varying the level of the faulty relay detection signal by a switch circuit provided at the position of a relay and according to the presence or absence of a fault of the relay. CONSTITUTION:The faulty relay detection signal is transmitted to a monitor signal line 9 from an end office device to reach a manhole 7. The control output of a control circuit 6 of each relay 2 is connected to a switch circuit 8 after obtaining an OR of the output of each relay. When a fault occurs to the working condition of the relay 2, the output of the circuit 6 varies to give a chang to the circuit 8 of the manhole 7. Accordingly, the circuit 8 that had a change can be known by detecting the state under which the faulty relay detection signal is sent to the line 9 and then returned to a monitor signal line 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55078033A JPS6014546B2 (en) | 1980-06-10 | 1980-06-10 | Fault monitoring method for cable relay communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55078033A JPS6014546B2 (en) | 1980-06-10 | 1980-06-10 | Fault monitoring method for cable relay communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS574623A true JPS574623A (en) | 1982-01-11 |
JPS6014546B2 JPS6014546B2 (en) | 1985-04-13 |
Family
ID=13650492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55078033A Expired JPS6014546B2 (en) | 1980-06-10 | 1980-06-10 | Fault monitoring method for cable relay communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6014546B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5382690A (en) * | 1992-08-11 | 1995-01-17 | Mitsui Toatsu Chemicals, Incorporated | Method for preparing aromatic secondary amino compound |
US5618980A (en) * | 1992-08-11 | 1997-04-08 | Mitsui Toatsu Chemicals, Inc. | Method for preparing aromatic secondary amino compound |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2578854B2 (en) * | 1987-12-22 | 1997-02-05 | 松下電器産業株式会社 | Receiver circuit |
-
1980
- 1980-06-10 JP JP55078033A patent/JPS6014546B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5382690A (en) * | 1992-08-11 | 1995-01-17 | Mitsui Toatsu Chemicals, Incorporated | Method for preparing aromatic secondary amino compound |
US5618980A (en) * | 1992-08-11 | 1997-04-08 | Mitsui Toatsu Chemicals, Inc. | Method for preparing aromatic secondary amino compound |
Also Published As
Publication number | Publication date |
---|---|
JPS6014546B2 (en) | 1985-04-13 |
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