JPS5646348A - Loop transmission system - Google Patents

Loop transmission system

Info

Publication number
JPS5646348A
JPS5646348A JP12064379A JP12064379A JPS5646348A JP S5646348 A JPS5646348 A JP S5646348A JP 12064379 A JP12064379 A JP 12064379A JP 12064379 A JP12064379 A JP 12064379A JP S5646348 A JPS5646348 A JP S5646348A
Authority
JP
Japan
Prior art keywords
terminal
loop
transmission
controller
reception
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
JP12064379A
Other languages
Japanese (ja)
Other versions
JPS5811783B2 (en
Inventor
Seitaro Miyajima
Kenichiro Kanayama
Hiroya Onimaru
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP54120643A priority Critical patent/JPS5811783B2/en
Publication of JPS5646348A publication Critical patent/JPS5646348A/en
Publication of JPS5811783B2 publication Critical patent/JPS5811783B2/en
Expired 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)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To enable to change the location of installation and to increase or decrease the terminal unit easily, by connecting the switch which includes the terminal device in the loop transmission line or separates it, in a series loop at the center concentratedly, and connecting each terminal to the switch individually. CONSTITUTION:The central control unit 29 consists of the central controller 21, transmission circuits 22, 24, reception circuits 23, 25 and change-over switch 31, and a plurality of terminal devices 30 consist of the reception circuit 26, transmission circuit 27, and local controller 28. When each terminal 30 is included in the loop transmission path, by connecting each switch 31 to the transmission line 25a, series connection is made as the transmission of the controller 21, transmission of controller 29, reception and transmission of terminal, reception of controller 29, and reception of controller 21, to form the loop transmission line. If one terminal is separated from the loop transmission line, the switch 31 where the said terminal is connected is connected to the transmission line 22a or 31a, allowing the terminal only detached from the loop and to constitute the loop with the rest of terminals.
JP54120643A 1979-09-21 1979-09-21 loop transmission system Expired JPS5811783B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54120643A JPS5811783B2 (en) 1979-09-21 1979-09-21 loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54120643A JPS5811783B2 (en) 1979-09-21 1979-09-21 loop transmission system

Publications (2)

Publication Number Publication Date
JPS5646348A true JPS5646348A (en) 1981-04-27
JPS5811783B2 JPS5811783B2 (en) 1983-03-04

Family

ID=14791294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54120643A Expired JPS5811783B2 (en) 1979-09-21 1979-09-21 loop transmission system

Country Status (1)

Country Link
JP (1) JPS5811783B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014528A (en) * 1983-07-06 1985-01-25 Seiichi Miyazaki Remote bypass system
JPS61187446A (en) * 1985-02-15 1986-08-21 Hitachi Ltd Fault disconnecting system for line concentrator
US4608556A (en) * 1983-07-04 1986-08-26 Cole Martin T Smoke detection apparatus
USRE32516E (en) * 1985-07-01 1987-10-06 American Telephone & Telegraph Co., At&T Bell Labs Loop switching system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6338177U (en) * 1986-08-26 1988-03-11
US9949539B2 (en) 2010-06-03 2018-04-24 Frederick Goldman, Inc. Method of making multi-coated metallic article
US8932437B2 (en) 2011-06-03 2015-01-13 Frederick Goldman, Inc. Multi-coated metallic products and methods of making the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4879507A (en) * 1972-01-25 1973-10-25
JPS526014A (en) * 1975-07-04 1977-01-18 Hitachi Ltd Line switching system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4879507A (en) * 1972-01-25 1973-10-25
JPS526014A (en) * 1975-07-04 1977-01-18 Hitachi Ltd Line switching system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608556A (en) * 1983-07-04 1986-08-26 Cole Martin T Smoke detection apparatus
JPS6014528A (en) * 1983-07-06 1985-01-25 Seiichi Miyazaki Remote bypass system
JPS61187446A (en) * 1985-02-15 1986-08-21 Hitachi Ltd Fault disconnecting system for line concentrator
USRE32516E (en) * 1985-07-01 1987-10-06 American Telephone & Telegraph Co., At&T Bell Labs Loop switching system

Also Published As

Publication number Publication date
JPS5811783B2 (en) 1983-03-04

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