[go: up one dir, main page]

JPS57162554A - Loop-back monitor system of loop circuit network - Google Patents

Loop-back monitor system of loop circuit network

Info

Publication number
JPS57162554A
JPS57162554A JP4638281A JP4638281A JPS57162554A JP S57162554 A JPS57162554 A JP S57162554A JP 4638281 A JP4638281 A JP 4638281A JP 4638281 A JP4638281 A JP 4638281A JP S57162554 A JPS57162554 A JP S57162554A
Authority
JP
Japan
Prior art keywords
station
loop
replay
line
stations
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
JP4638281A
Other languages
Japanese (ja)
Inventor
Koji Iijima
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4638281A priority Critical patent/JPS57162554A/en
Publication of JPS57162554A publication Critical patent/JPS57162554A/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 realize an accurate detection and exclusion of an area of disconnection of a loop transmission line by a loop-back operation even in case a node station having the by-pass mode exists. CONSTITUTION:In case a fault of disconnection arises at the point A on a loop transmission line as shown in the diagram with a node station 14 by-passed, a monitor station 10 transmits a command to carry out the loop-back from line No.0 through line No.1 to the node stations 16, 15, 14 and 13 in that order to obtain a replay. However, no replay is given from the station 16 through the station 14, and the replay is obtained at the station 13 for the first time. Thus the loop-back is fixed at the station 13. After this, the station 10 delivers a loop-back command to give the loop-back from line No.1 through line No.0 to the nodes stations 13, 14, 15 and 16 in that order to obtain a replay. No replay is given from the station 13 since the disconnection is caused between the stations 13 and 14 as well as from the station 14 since the station 14 is by-passed. Thus the reply is obtained for the first time from the station 15. The loop- back is fixed at the station 15.
JP4638281A 1981-03-31 1981-03-31 Loop-back monitor system of loop circuit network Pending JPS57162554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4638281A JPS57162554A (en) 1981-03-31 1981-03-31 Loop-back monitor system of loop circuit network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4638281A JPS57162554A (en) 1981-03-31 1981-03-31 Loop-back monitor system of loop circuit network

Publications (1)

Publication Number Publication Date
JPS57162554A true JPS57162554A (en) 1982-10-06

Family

ID=12745586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4638281A Pending JPS57162554A (en) 1981-03-31 1981-03-31 Loop-back monitor system of loop circuit network

Country Status (1)

Country Link
JP (1) JPS57162554A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172864A (en) * 1983-02-07 1984-09-29 エヌ・ベー・フイリップス・フルーイランペンファブリケン Time division multiplex loop electric communication system
JPS6074843A (en) * 1983-09-30 1985-04-27 Toshiba Corp Data way loop-back control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172864A (en) * 1983-02-07 1984-09-29 エヌ・ベー・フイリップス・フルーイランペンファブリケン Time division multiplex loop electric communication system
JPS6074843A (en) * 1983-09-30 1985-04-27 Toshiba Corp Data way loop-back control system

Similar Documents

Publication Publication Date Title
KR900006789B1 (en) Loop transmission system having automatic loop configuration control means
CA2044718A1 (en) Rerouting and change-back systems for asynchronous transfer mode network
JPS6460026A (en) Transmission line switching device for communication equipment
JPS57157661A (en) Transmission line switching system
JPS5792948A (en) Loop data transmission system
JPS57162554A (en) Loop-back monitor system of loop circuit network
JPS55161449A (en) Fault monitor system
JPS57173246A (en) Data transmission system
JPS5499506A (en) Repeating monitor system
JPS5715548A (en) Polling monitor system
JPS556628A (en) Fault transfer systen
JPS5837743B2 (en) Automatic transmission line switching method
JPS533718A (en) Fault test system of terminal station in time division multiple connecting communication system
JPS641350A (en) Gateway backing-up system
JPS52136505A (en) Automatic fault restoration system for loop transmission system
JPS54161805A (en) Signal transmission system
JPS52152051A (en) Elevator signal transmitting device
JPS5619256A (en) Centralized monitor control system
JPS57113662A (en) Detection processing system for communication failure
JPS5595490A (en) System switching system for exchange
JPS5745746A (en) Failure monitor system for loop network system
JPS53145406A (en) Loop transmission system
JPS5358705A (en) Switching system for transmission line
JPS56103586A (en) Remote monitor control device
JPS55128934A (en) Circuit network switching system