JPS5613854A - Double loop switching system - Google Patents

Double loop switching system

Info

Publication number
JPS5613854A
JPS5613854A JP8829979A JP8829979A JPS5613854A JP S5613854 A JPS5613854 A JP S5613854A JP 8829979 A JP8829979 A JP 8829979A JP 8829979 A JP8829979 A JP 8829979A JP S5613854 A JPS5613854 A JP S5613854A
Authority
JP
Japan
Prior art keywords
circuit
data transmitting
line
control
control device
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
JP8829979A
Other languages
Japanese (ja)
Inventor
Toshio Matsumoto
Hitoshi Fushimi
Seiichi Yasumoto
Masakazu Okada
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 JP8829979A priority Critical patent/JPS5613854A/en
Publication of JPS5613854A publication Critical patent/JPS5613854A/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 enhance the maintenance, the reliability and the throughput each, by installing the switching circuit which is controlled by the control line different from the common transmission line between the data transmitting device and the circuit control device. CONSTITUTION:Central computer 7 is connected to transmission lines 1 and 2 each via circuit control device 3 and central data transmitting device 4, along with connection of terminal computers 8-10 plus 11-13 via device 3 plus terminal data transmitting devices 5 and 6. Switching circuit 17 is provided between device 3 and devices 4-6 each, and each circuit 17 selects and connects line 1 or 2 by the switch signal which is sent from control device 15 controlled by computer 7 via control line 16 wired radially. At the same time, each circuit 17 reports the switching state showing to which transmission line the connection is given via the control line to device 15. In this way, a data transmitting system is attained with a good maintenance, high reliability and high throughput performance each.
JP8829979A 1979-07-13 1979-07-13 Double loop switching system Pending JPS5613854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8829979A JPS5613854A (en) 1979-07-13 1979-07-13 Double loop switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8829979A JPS5613854A (en) 1979-07-13 1979-07-13 Double loop switching system

Publications (1)

Publication Number Publication Date
JPS5613854A true JPS5613854A (en) 1981-02-10

Family

ID=13939039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8829979A Pending JPS5613854A (en) 1979-07-13 1979-07-13 Double loop switching system

Country Status (1)

Country Link
JP (1) JPS5613854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07238534A (en) * 1994-02-25 1995-09-12 Hidekazu Iwamoto Cylindrical soil improvement method and piling machine thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53942A (en) * 1976-06-25 1978-01-07 Hitachi Ltd Double loop system back-up method
JPS5441602A (en) * 1977-09-09 1979-04-03 Fujitsu Ltd Loop type data delivery system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53942A (en) * 1976-06-25 1978-01-07 Hitachi Ltd Double loop system back-up method
JPS5441602A (en) * 1977-09-09 1979-04-03 Fujitsu Ltd Loop type data delivery system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07238534A (en) * 1994-02-25 1995-09-12 Hidekazu Iwamoto Cylindrical soil improvement method and piling machine thereof

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