JPS56149843A - Optical loop data transmission system - Google Patents

Optical loop data transmission system

Info

Publication number
JPS56149843A
JPS56149843A JP5390080A JP5390080A JPS56149843A JP S56149843 A JPS56149843 A JP S56149843A JP 5390080 A JP5390080 A JP 5390080A JP 5390080 A JP5390080 A JP 5390080A JP S56149843 A JPS56149843 A JP S56149843A
Authority
JP
Japan
Prior art keywords
burst
signal
station
burst signal
signals
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.)
Granted
Application number
JP5390080A
Other languages
Japanese (ja)
Other versions
JPS6356733B2 (en
Inventor
Toshio Hasegawa
Takeshi Sawai
Takuya Iwagami
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5390080A priority Critical patent/JPS56149843A/en
Publication of JPS56149843A publication Critical patent/JPS56149843A/en
Publication of JPS6356733B2 publication Critical patent/JPS6356733B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To obtain an optical loop data transmission system which requires no guard band and has used a photoaccessor having high utilization factor of a transmission line, by adding the start and end information to a burst signal. CONSTITUTION:Burst signals A, B having no guard band are sent out from the center station. The remote station processes the received signals by the light pulse send-out means and sends out the burst signals A', B' which have been regenerated, so that delay is superposed together on the burst signals whose level has been lowered. Also, a communication burst signal C from the own station detects an idle time space and is inserted asynchronously. In this case, even when the burst signal C of #1 station is detected in the course of inserting a burst signal Z in #2 station and the signal Z is halted on the way, the start information showing the start of the signal and the end information showing its end are added to each burst signal so that only a perfect burst signal can be extracted.
JP5390080A 1980-04-23 1980-04-23 Optical loop data transmission system Granted JPS56149843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5390080A JPS56149843A (en) 1980-04-23 1980-04-23 Optical loop data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5390080A JPS56149843A (en) 1980-04-23 1980-04-23 Optical loop data transmission system

Publications (2)

Publication Number Publication Date
JPS56149843A true JPS56149843A (en) 1981-11-19
JPS6356733B2 JPS6356733B2 (en) 1988-11-09

Family

ID=12955588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5390080A Granted JPS56149843A (en) 1980-04-23 1980-04-23 Optical loop data transmission system

Country Status (1)

Country Link
JP (1) JPS56149843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126340A (en) * 1983-01-06 1984-07-20 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Circuit device for connecting interface to remote function unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126340A (en) * 1983-01-06 1984-07-20 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Circuit device for connecting interface to remote function unit
JPH03936B2 (en) * 1983-01-06 1991-01-09 Intaanashonaru Bijinesu Mashiinzu Corp

Also Published As

Publication number Publication date
JPS6356733B2 (en) 1988-11-09

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