JPS6474835A - Device for monitoring optical transmission system - Google Patents
Device for monitoring optical transmission systemInfo
- Publication number
- JPS6474835A JPS6474835A JP62231176A JP23117687A JPS6474835A JP S6474835 A JPS6474835 A JP S6474835A JP 62231176 A JP62231176 A JP 62231176A JP 23117687 A JP23117687 A JP 23117687A JP S6474835 A JPS6474835 A JP S6474835A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- transmission
- monitoring
- receiver
- transmitter
- 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
Abstract
PURPOSE:To monitor a light transmission system, by controlling the delivery of a monitoring optical signal for (n) optical sensors with wavelength different from that of an optical signal for transmission which performs transmission/ reception via an optical fiber, and monitoring it based on back scattered light. CONSTITUTION:In a light transmitter/receiver 1, a transmission signal Sia is delivered from an optical multiplexer/demultiplexer 5 to an optical fiber 2 as the optical signal Lia with wavelength lambdax, and is restored to a transmission signal Soa at a light transmitter/receiver 3. On the other hand, a transmission signal Sib is delivered from the transmitter/receiver 3 as the optical signal Lib with wavelength lambday, and is restored to a transmission signal Sab at the transmitter/receiver 1. In a monitoring operation mode, a monitoring part 10 in the transmitter/receiver delivers optical pulse signals L11-L1n with wavelength lambda1-lambdan to the fiber 2 in time series by controlling a switch circuit 13 by a control monitoring part 12, and performs monitoring based on the back scattered light obtained from the fiber 2 and sensors S1-Sn. In such a way, it is possible to perform the monitoring of the light transmission system by using the optical fiber to be used in the transmission of the transmission signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62231176A JPS6474835A (en) | 1987-09-17 | 1987-09-17 | Device for monitoring optical transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62231176A JPS6474835A (en) | 1987-09-17 | 1987-09-17 | Device for monitoring optical transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6474835A true JPS6474835A (en) | 1989-03-20 |
Family
ID=16919509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62231176A Pending JPS6474835A (en) | 1987-09-17 | 1987-09-17 | Device for monitoring optical transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6474835A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5790289A (en) * | 1995-05-26 | 1998-08-04 | Kokusai Denshin Denwa Kabushiki Kaisha | WDM optical communication method with pre-emphasis technique and an apparatus therefor |
US6301036B1 (en) * | 1995-12-21 | 2001-10-09 | Alcatel | optical signal transmission network with fiber-break detection |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60121829A (en) * | 1983-12-05 | 1985-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Terminal device for searching for trouble section |
JPS61288298A (en) * | 1985-06-17 | 1986-12-18 | 日立電線株式会社 | Multipoint monitoring system |
-
1987
- 1987-09-17 JP JP62231176A patent/JPS6474835A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60121829A (en) * | 1983-12-05 | 1985-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Terminal device for searching for trouble section |
JPS61288298A (en) * | 1985-06-17 | 1986-12-18 | 日立電線株式会社 | Multipoint monitoring system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5790289A (en) * | 1995-05-26 | 1998-08-04 | Kokusai Denshin Denwa Kabushiki Kaisha | WDM optical communication method with pre-emphasis technique and an apparatus therefor |
US6301036B1 (en) * | 1995-12-21 | 2001-10-09 | Alcatel | optical signal transmission network with fiber-break detection |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0844751A3 (en) | Optical transmitter, terminal-station apparatus having the optical transmitter and optical communication system, monitoring the optical transmitted signal | |
JPS6474835A (en) | Device for monitoring optical transmission system | |
US4761777A (en) | Optical multiplex systems | |
EP1321750A3 (en) | Wavelength locker and optical systems using the same | |
CA2136551A1 (en) | Device for Continuously Monitoring the Needles of a Knitting Machine During Operation Thereof | |
JPS55105453A (en) | Optical wavelength multiple repeating system | |
SE0003514L (en) | A transmitter-receiver device, and a communication system | |
EP1211827A3 (en) | Optical signal monitoring system and method of optical signal monitoring | |
JPS5687948A (en) | Optical communication system | |
JPS57190436A (en) | Adjusting method for optical transmitting line | |
JPS6474834A (en) | Device for monitoring optical transmission system | |
EP0395828A3 (en) | Optical transmission apparatus | |
JPS6418326A (en) | Space propagation optical communication equipment | |
JPS6473831A (en) | Bidirectional catv system | |
JPS5693443A (en) | Optical communication system | |
JPS572190A (en) | Remote control system | |
JPS6434030A (en) | Optical fiber transmitter | |
JPH06125308A (en) | Optical signal transmitter | |
JPS5496940A (en) | Information transmission system | |
JPS56149841A (en) | Optical fiber transmission system | |
JPS5735447A (en) | Data transmission system | |
JPS5773547A (en) | Remote monitor and control system | |
JPS556950A (en) | Supervisory system | |
JPS5624834A (en) | Car-use control device using optical fiber | |
JPS53144204A (en) | Transmitting system for optical communication circuit monitor/order signal |