JPS57207454A - Loop system data highway system - Google Patents

Loop system data highway system

Info

Publication number
JPS57207454A
JPS57207454A JP56092485A JP9248581A JPS57207454A JP S57207454 A JPS57207454 A JP S57207454A JP 56092485 A JP56092485 A JP 56092485A JP 9248581 A JP9248581 A JP 9248581A JP S57207454 A JPS57207454 A JP S57207454A
Authority
JP
Japan
Prior art keywords
loop
broken
detection circuit
transmission lines
circuit
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
JP56092485A
Other languages
Japanese (ja)
Inventor
Toshiya Senoo
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.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing 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 Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP56092485A priority Critical patent/JPS57207454A/en
Publication of JPS57207454A publication Critical patent/JPS57207454A/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 prevent the stopping of a transmission function by automatically detecting a broken part and constituting a receovered loop and to restore the system into a normal state, when a transmission line is broken through dupllex transmission lines. CONSTITUTION:A master station M and a plurality of remote stations R1-Rn are connected with a loop transmission line L1 of the system 1 and a loop transmission line L2 of the system 2, and an information processor PU is connected to the respective station M and the R1-Rn and the flow of information signals of the transmission lines L1 and L2 is made inverse. A link connecting the transmission lines L1 and L2 of the stations M and R1-Rn with the processor PU is provided with a pattern detection circuit 35 detecting the coincidence between received data and the flag pattern from the clock, a detection circuit 36 for the generation of broken wire, an FF37 and a detection circuit 36 for the generation of broken wire, an FF37 and a detection circuit 39 for the receovery of broken wire. The circuit 35 and 36 automatically detect the broken part and the circuit 39 automtically detects the restoration of the failure, allowing to reorganize the loop of the transmission lines L1 and L2.
JP56092485A 1981-06-16 1981-06-16 Loop system data highway system Pending JPS57207454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56092485A JPS57207454A (en) 1981-06-16 1981-06-16 Loop system data highway system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56092485A JPS57207454A (en) 1981-06-16 1981-06-16 Loop system data highway system

Publications (1)

Publication Number Publication Date
JPS57207454A true JPS57207454A (en) 1982-12-20

Family

ID=14055603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56092485A Pending JPS57207454A (en) 1981-06-16 1981-06-16 Loop system data highway system

Country Status (1)

Country Link
JP (1) JPS57207454A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961237A (en) * 1982-09-29 1984-04-07 Toshiba Corp Optical data way system
JPS60239147A (en) * 1984-05-14 1985-11-28 Mitsubishi Electric Corp Duplicated ring type transmission system
JPS61114630A (en) * 1984-11-08 1986-06-02 Meidensha Electric Mfg Co Ltd Line controller of loop transmission line
JPS61154332A (en) * 1984-12-27 1986-07-14 Toshiba Corp Data transmitter
JPS6234440A (en) * 1985-08-06 1987-02-14 Nec Corp Reassembling system for looped transmission line

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5082926A (en) * 1973-11-26 1975-07-04
JPS54139347A (en) * 1978-04-21 1979-10-29 Agency Of Ind Science & Technol Loop anomaly detector circuit
JPS55161449A (en) * 1979-05-31 1980-12-16 Fujitsu Ltd Fault monitor system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5082926A (en) * 1973-11-26 1975-07-04
JPS54139347A (en) * 1978-04-21 1979-10-29 Agency Of Ind Science & Technol Loop anomaly detector circuit
JPS55161449A (en) * 1979-05-31 1980-12-16 Fujitsu Ltd Fault monitor system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961237A (en) * 1982-09-29 1984-04-07 Toshiba Corp Optical data way system
JPS60239147A (en) * 1984-05-14 1985-11-28 Mitsubishi Electric Corp Duplicated ring type transmission system
JPS61114630A (en) * 1984-11-08 1986-06-02 Meidensha Electric Mfg Co Ltd Line controller of loop transmission line
JPS61154332A (en) * 1984-12-27 1986-07-14 Toshiba Corp Data transmitter
JPH0324111B2 (en) * 1984-12-27 1991-04-02 Tokyo Shibaura Electric Co
JPS6234440A (en) * 1985-08-06 1987-02-14 Nec Corp Reassembling system for looped transmission line

Similar Documents

Publication Publication Date Title
EP0144953A3 (en) Method of detecting recovery from fault in a data transmission system which effects loopback control
JPS57164636A (en) Control method for transmission system
CA2071725A1 (en) Lead Line Supervision System
CA2021539A1 (en) Multipoint communication system with retraining of modems
ES8609851A1 (en) Loop transmission system.
JPS5765036A (en) Loop type data highway system
JPS5730098A (en) Method of transmitting measured value in fire alarm unit and device for executing same method
JPS5792948A (en) Loop data transmission system
JPS57207454A (en) Loop system data highway system
EP0264879A3 (en) A fault detection signal transmission system
EP0682435A3 (en) Alarm and test system with improved coupling circuit for a digital added main line.
JPS537352A (en) Data collection system in digital telemeter system
JPS55118249A (en) Data communication control system
JPS5478607A (en) Data transmission system
JPS5693474A (en) Data transmission line release control system
JPS57164638A (en) Loop transmission system
JPS6477340A (en) Repeater system for local area network
JPS57157301A (en) Transmitter for plant monitor and control
JPS57192150A (en) Transmission and reception circuit
JPS5538715A (en) Fault detection system
JPS57111137A (en) Carrier signal transmission system by distribution line
JPS56116354A (en) Failure monitor system
JPS54139420A (en) Selective connection method for transmission system
JPS5733851A (en) Switching system of station
JPS5458302A (en) Backup unit for loop communication line