JPS5499506A - Repeating monitor system - Google Patents
Repeating monitor systemInfo
- Publication number
- JPS5499506A JPS5499506A JP581978A JP581978A JPS5499506A JP S5499506 A JPS5499506 A JP S5499506A JP 581978 A JP581978 A JP 581978A JP 581978 A JP581978 A JP 581978A JP S5499506 A JPS5499506 A JP S5499506A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- repeater
- ssvk
- case
- frequency
- 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
- H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To ensure an extremely quick detection of the faulty area as well as to reduce greatly the band width of the SV signal by generating the frequency proper to each repeater and sending it to the next step in case the SV signal is not received normally. CONSTITUTION:In case some fault takes place in repeater 14-(k - 1) which is just before repeater 14-K, repeater 14-K cannot receive the SM signal at input terminal 21-in. And SV signal monitor 32 detects this and then sends it own oscillation output to piling unit 23 through oscillator 24. Thus, the transmission signal of output terminal 21-out is turned into the composite signal of data signal Sd and SV signal SSVK of frequency fk. And if no fault is detected in the subsequent repeaters, signal SSVK is received at reception end office 12 in the form of the SV signal. Thus, the fault occurrence of repeater 14-(K - 1) can be detected at office 12 through viewing SSVK. In this case too, the SV signal running on the transmission line features frequency fk at the lower part of repeater 14-K and with an extremely band width.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP581978A JPS5499506A (en) | 1978-01-24 | 1978-01-24 | Repeating monitor system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP581978A JPS5499506A (en) | 1978-01-24 | 1978-01-24 | Repeating monitor system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5499506A true JPS5499506A (en) | 1979-08-06 |
Family
ID=11621682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP581978A Pending JPS5499506A (en) | 1978-01-24 | 1978-01-24 | Repeating monitor system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5499506A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56103547A (en) * | 1980-01-22 | 1981-08-18 | Toshiba Corp | Optical communication system |
JPS62295532A (en) * | 1986-06-14 | 1987-12-22 | Nec Corp | Line supervisory system |
JPS63238746A (en) * | 1987-03-26 | 1988-10-04 | Nec Corp | Trouble supervising system for transmission line signal |
JPH07107055A (en) * | 1993-10-05 | 1995-04-21 | Nec Corp | Fault detection circuit |
-
1978
- 1978-01-24 JP JP581978A patent/JPS5499506A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56103547A (en) * | 1980-01-22 | 1981-08-18 | Toshiba Corp | Optical communication system |
JPS62295532A (en) * | 1986-06-14 | 1987-12-22 | Nec Corp | Line supervisory system |
JPH0644744B2 (en) * | 1986-06-14 | 1994-06-08 | 日本電気株式会社 | Line monitoring method |
JPS63238746A (en) * | 1987-03-26 | 1988-10-04 | Nec Corp | Trouble supervising system for transmission line signal |
JPH07107055A (en) * | 1993-10-05 | 1995-04-21 | Nec Corp | Fault detection circuit |
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