JPS5553943A - Folded connection control system for loop transmission line - Google Patents

Folded connection control system for loop transmission line

Info

Publication number
JPS5553943A
JPS5553943A JP12747978A JP12747978A JPS5553943A JP S5553943 A JPS5553943 A JP S5553943A JP 12747978 A JP12747978 A JP 12747978A JP 12747978 A JP12747978 A JP 12747978A JP S5553943 A JPS5553943 A JP S5553943A
Authority
JP
Japan
Prior art keywords
transmission line
trouble
loop transmission
line
transmission
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
Application number
JP12747978A
Other languages
Japanese (ja)
Inventor
Makoto Miyazaki
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 JP12747978A priority Critical patent/JPS5553943A/en
Publication of JPS5553943A publication Critical patent/JPS5553943A/en
Pending 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
    • H04L12/437—Ring fault isolation or reconfiguration

Landscapes

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

Abstract

PURPOSE:To shorten the system stop time caused by the transmission trouble by securing the folded conection for end officies combined via the double loop transmission lines through the trouble detection of the transmission line. CONSTITUTION:Plural units of end offices 3a are combined to each other via double loop transmission lines 2 and 2' which perform the transmission in the opposite direction to each other, and each office 3a incorporates folded connection switches 33 and 33'. Now in case some trouble occurs on lines 2 and 2' at the position of the X mark, end office 3b left to point X detects the trouble with switch 33 turned toward B to carry out the return to line 2 from 2'. While switch 33' of end office 3c right to point X is turned toward B to give the return to line 2' from 2. In such way, the new single loop transmission line is formed again to ensure again the application of the transmission line. As a result, the system stop time can be reduced greatly.
JP12747978A 1978-10-17 1978-10-17 Folded connection control system for loop transmission line Pending JPS5553943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12747978A JPS5553943A (en) 1978-10-17 1978-10-17 Folded connection control system for loop transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12747978A JPS5553943A (en) 1978-10-17 1978-10-17 Folded connection control system for loop transmission line

Publications (1)

Publication Number Publication Date
JPS5553943A true JPS5553943A (en) 1980-04-19

Family

ID=14960945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12747978A Pending JPS5553943A (en) 1978-10-17 1978-10-17 Folded connection control system for loop transmission line

Country Status (1)

Country Link
JP (1) JPS5553943A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765034A (en) * 1980-10-09 1982-04-20 Fuji Facom Corp Loop back system in closed loop transmission ystem
JPS61144942A (en) * 1984-12-18 1986-07-02 Nec Corp Line switching system in loop data transmission line

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5044702A (en) * 1973-07-25 1975-04-22
JPS5132244A (en) * 1974-07-12 1976-03-18 Thomson Csf
JPS5368046A (en) * 1976-11-30 1978-06-17 Toshiba Corp Loop-type data highway system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5044702A (en) * 1973-07-25 1975-04-22
JPS5132244A (en) * 1974-07-12 1976-03-18 Thomson Csf
JPS5368046A (en) * 1976-11-30 1978-06-17 Toshiba Corp Loop-type data highway system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765034A (en) * 1980-10-09 1982-04-20 Fuji Facom Corp Loop back system in closed loop transmission ystem
JPS61144942A (en) * 1984-12-18 1986-07-02 Nec Corp Line switching system in loop data transmission line

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