JPS6453657A - Supervising system for low order group digital transmission line - Google Patents
Supervising system for low order group digital transmission lineInfo
- Publication number
- JPS6453657A JPS6453657A JP3803688A JP3803688A JPS6453657A JP S6453657 A JPS6453657 A JP S6453657A JP 3803688 A JP3803688 A JP 3803688A JP 3803688 A JP3803688 A JP 3803688A JP S6453657 A JPS6453657 A JP S6453657A
- Authority
- JP
- Japan
- Prior art keywords
- monitor
- output
- transmission line
- low order
- digital 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.)
- Granted
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE:To collect error rate information from respective repeaters in an operation condition by providing a tertiary winding to generate a monitor output in respective repeaters. CONSTITUTION:In the operation condition, a monitor output is taken out from tertiary windings M1 and M2 of a repeater, the monitor output is fetched by an analog switch SW, added to a converter B/U and a unipolar output is added to an error monitor EM. The error monitor EM fetches H and L levels by a clock reproduced with the converter B/U, an input turn-off is detected (since a signal is an AMI code, positive and negative pulses are alternately received.), collects it as error rate information (10<-3>, 10<-4>, 10<-5> errors, etc.) and sends it to a processor. The processor transmits this to a monitor station by an FSK.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3803688A JPS6453657A (en) | 1987-02-20 | 1988-02-19 | Supervising system for low order group digital transmission line |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3891687 | 1987-02-20 | ||
JP3803688A JPS6453657A (en) | 1987-02-20 | 1988-02-19 | Supervising system for low order group digital transmission line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6453657A true JPS6453657A (en) | 1989-03-01 |
JPH0575302B2 JPH0575302B2 (en) | 1993-10-20 |
Family
ID=26377217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3803688A Granted JPS6453657A (en) | 1987-02-20 | 1988-02-19 | Supervising system for low order group digital transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6453657A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5038364A (en) * | 1988-11-28 | 1991-08-06 | Fujitsu Limited | Transmission line monitoring system |
-
1988
- 1988-02-19 JP JP3803688A patent/JPS6453657A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5038364A (en) * | 1988-11-28 | 1991-08-06 | Fujitsu Limited | Transmission line monitoring system |
Also Published As
Publication number | Publication date |
---|---|
JPH0575302B2 (en) | 1993-10-20 |
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