JPS56143737A - Remote selective control system for optical repeater - Google Patents
Remote selective control system for optical repeaterInfo
- Publication number
- JPS56143737A JPS56143737A JP4573680A JP4573680A JPS56143737A JP S56143737 A JPS56143737 A JP S56143737A JP 4573680 A JP4573680 A JP 4573680A JP 4573680 A JP4573680 A JP 4573680A JP S56143737 A JPS56143737 A JP S56143737A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- repeater
- higher harmonic
- selective control
- control system
- 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
- H04B17/405—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local multipliers, dividers, modulators
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To exercise remote selective control over a repeater by sending a signal of a natural frequency, assigned to the repeater, from a terminal station to a transmission line and by receiving simultaneously higher harmonic components, based on the natural frequency, by the receiving circuit of the repeater. CONSTITUTION:Filter 41 tunes to frequency m1 of the higher harmonic of degree (m) of fundamental frequency 11, and filter 42 tunes to frequency n1 of the higher harmonic of degree (n). When a terminal station sends a pattern train containing frequency components of fundamental frequency 11, filters 41 and 42 generate output voltages. The outputs of filters 41 and 42 are applied to detecting circuits 51 and 52 for the discrimination of signal reception and then applied to optical switch 7 via AND circuit 9 and amplifying circuit 6 to drive the switch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4573680A JPS56143737A (en) | 1980-04-09 | 1980-04-09 | Remote selective control system for optical repeater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4573680A JPS56143737A (en) | 1980-04-09 | 1980-04-09 | Remote selective control system for optical repeater |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56143737A true JPS56143737A (en) | 1981-11-09 |
Family
ID=12727600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4573680A Pending JPS56143737A (en) | 1980-04-09 | 1980-04-09 | Remote selective control system for optical repeater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56143737A (en) |
-
1980
- 1980-04-09 JP JP4573680A patent/JPS56143737A/en active Pending
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