JPS573455A - Failure point orientating system and failure retrieval signal generator - Google Patents
Failure point orientating system and failure retrieval signal generatorInfo
- Publication number
- JPS573455A JPS573455A JP7643580A JP7643580A JPS573455A JP S573455 A JPS573455 A JP S573455A JP 7643580 A JP7643580 A JP 7643580A JP 7643580 A JP7643580 A JP 7643580A JP S573455 A JPS573455 A JP S573455A
- Authority
- JP
- Japan
- Prior art keywords
- failure
- frequency component
- relay
- retrieval signal
- office station
- 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
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To monitor the failure points of a relay transmission line at an office station concentratingly, by transmitting a failure retrieval signal including an audio band component in different frequency from the office station and monitoring the level or phase of the frequency component signal returned from the relay point. CONSTITUTION:A band pass filter BPF 6 different from pass band is connected to a relay panel 5 at each relay point, and either a signal including audio band frequency component from an office station 1 having a failure retrieval signal generator 2 and a failure retrieval signal measuring device or a signal including the audio band frequency component with a simple code conversion is transmitted to a transmission line 4 as a failure retrieval signal. At each relay point, the frequency component is picked up and the audio frequency component only assigned to the relay point via the BPF 6 is transmitted to the office station 1 through interface lines. Thus, the failed relay panel can be rated by transmitting a failure retrieval signal including audio band component different from frequency from the office station 1 sequentially and monitoring the level or phase of the frequency component signal returned from the relay point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7643580A JPS573455A (en) | 1980-06-06 | 1980-06-06 | Failure point orientating system and failure retrieval signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7643580A JPS573455A (en) | 1980-06-06 | 1980-06-06 | Failure point orientating system and failure retrieval signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS573455A true JPS573455A (en) | 1982-01-08 |
Family
ID=13605066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7643580A Pending JPS573455A (en) | 1980-06-06 | 1980-06-06 | Failure point orientating system and failure retrieval signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS573455A (en) |
-
1980
- 1980-06-06 JP JP7643580A patent/JPS573455A/en active Pending
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