JPS6252973B2 - - Google Patents

Info

Publication number
JPS6252973B2
JPS6252973B2 JP55005256A JP525680A JPS6252973B2 JP S6252973 B2 JPS6252973 B2 JP S6252973B2 JP 55005256 A JP55005256 A JP 55005256A JP 525680 A JP525680 A JP 525680A JP S6252973 B2 JPS6252973 B2 JP S6252973B2
Authority
JP
Japan
Prior art keywords
loop
wavelength
optical
station
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.)
Expired
Application number
JP55005256A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56103549A (en
Inventor
Kazunori Iwasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP525680A priority Critical patent/JPS56103549A/ja
Publication of JPS56103549A publication Critical patent/JPS56103549A/ja
Publication of JPS6252973B2 publication Critical patent/JPS6252973B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/035—Arrangements for fault recovery using loopbacks

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)
JP525680A 1980-01-22 1980-01-22 Loop type optical communication system Granted JPS56103549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP525680A JPS56103549A (en) 1980-01-22 1980-01-22 Loop type optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP525680A JPS56103549A (en) 1980-01-22 1980-01-22 Loop type optical communication system

Publications (2)

Publication Number Publication Date
JPS56103549A JPS56103549A (en) 1981-08-18
JPS6252973B2 true JPS6252973B2 (cs) 1987-11-09

Family

ID=11606135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP525680A Granted JPS56103549A (en) 1980-01-22 1980-01-22 Loop type optical communication system

Country Status (1)

Country Link
JP (1) JPS56103549A (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111147A (en) * 1980-12-26 1982-07-10 Fujitsu Ltd Station to be supervised, having folding function in optical loop transmission network
US5422772A (en) * 1989-08-28 1995-06-06 Mcdonnell Douglas Corporation Secure fiber optic networks
US5223967A (en) * 1986-06-11 1993-06-29 Mcdonnell Douglas Corporation Secure communications system

Also Published As

Publication number Publication date
JPS56103549A (en) 1981-08-18

Similar Documents

Publication Publication Date Title
EP0102222B1 (en) Loop transmission system and method of controlling its loop-back condition
EP0403973B1 (en) Ring network switching control device
US4190821A (en) Self-healing loop communications system
US5818816A (en) Communication device for switching connection from a working channel line to a protection channel line and vice versa
JPS63206045A (ja) リング網での障害箇所の検出方法
JPS6252973B2 (cs)
JPS626377B2 (cs)
US6212167B1 (en) Multiplexing transmitter
Corke et al. Recent advances in fiber optic coupler technology
JPH06244796A (ja) 光通信網
JPS60169255A (ja) ２重化ル−プ通信システム
JPS6139777B2 (cs)
US20030223380A1 (en) Ring network system
JP2531091B2 (ja) インタ―ロッキング・リングの回線切替方式
JP2778704B2 (ja) 光通信システム
JPS58123246A (ja) 光通信方式
JPH04334135A (ja) 光ファイバプロテクション方式
JPS5949739B2 (ja) ル−プ式光通信システム
JPH0227861B2 (ja) Ruupudensoshisutemu
JPS626378B2 (cs)
JP2589322B2 (ja) 光中継器監視回路
JPH04192940A (ja) 光ｌａｎシステム
JPS58121852A (ja) ル−プ形デ−タ伝送方式
JPH01133437A (ja) 光中継器
JPS6386636A (ja) デ−タ伝送方式