JPS55132152A - Light repeater - Google Patents
Light repeaterInfo
- Publication number
- JPS55132152A JPS55132152A JP3964779A JP3964779A JPS55132152A JP S55132152 A JPS55132152 A JP S55132152A JP 3964779 A JP3964779 A JP 3964779A JP 3964779 A JP3964779 A JP 3964779A JP S55132152 A JPS55132152 A JP S55132152A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- line
- interposing
- optical fiber
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To remove a restriction on the fault supervisory section length of an interposing line by sending a fault supervisory signal to a light transmission line without using any interposing line. CONSTITUTION:The photoelectric conversion output of input circhit 2 connecting with optical fiber 1 is equalized and amplified 3, and discriminating-reproducing sircuit 4 discriminates and reproduces a digital signal, which is electrophoto-converted by output sircuit 5 by way of switching circuit 19 before being sent to optical fiber 20. Part of the output of circuit 2 is input to level supervising circuit 16 and remote command discriminating circuit 17 to decide on the lowering of the input level and on an operation stop signal sent out from a transmitting station. On receiving a clock signal from voltage control oscillator 13, fixed pattern generating circuit 18 generates a string of pulses of a pattern assigned to each repeater. Circuit 16, when circuit 17 generates an output, puts circuit 18 into operation to control circuit 19, thereby sending a string of fixed pulses. Consequently, the orientation of a fault point comes into effect without using any interposing line, so that the long- distance repetition of the digital signal can be attained by the optical fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3964779A JPS55132152A (en) | 1979-04-02 | 1979-04-02 | Light repeater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3964779A JPS55132152A (en) | 1979-04-02 | 1979-04-02 | Light repeater |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55132152A true JPS55132152A (en) | 1980-10-14 |
Family
ID=12558868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3964779A Pending JPS55132152A (en) | 1979-04-02 | 1979-04-02 | Light repeater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55132152A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58120332A (en) * | 1982-01-04 | 1983-07-18 | エヌ ベー フイリップス フルーイランペンフアブリケン | Defect position searching device for digital light transmission system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030967A (en) * | 1973-07-18 | 1975-03-27 | ||
JPS51139207A (en) * | 1975-05-27 | 1976-12-01 | Marukou Kogyo Kk | System for supervising relay system |
-
1979
- 1979-04-02 JP JP3964779A patent/JPS55132152A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030967A (en) * | 1973-07-18 | 1975-03-27 | ||
JPS51139207A (en) * | 1975-05-27 | 1976-12-01 | Marukou Kogyo Kk | System for supervising relay system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58120332A (en) * | 1982-01-04 | 1983-07-18 | エヌ ベー フイリップス フルーイランペンフアブリケン | Defect position searching device for digital light transmission system |
JPH0340982B2 (en) * | 1982-01-04 | 1991-06-20 |
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