JPS57129047A - Loop connecting method - Google Patents

Loop connecting method

Info

Publication number
JPS57129047A
JPS57129047A JP56012845A JP1284581A JPS57129047A JP S57129047 A JPS57129047 A JP S57129047A JP 56012845 A JP56012845 A JP 56012845A JP 1284581 A JP1284581 A JP 1284581A JP S57129047 A JPS57129047 A JP S57129047A
Authority
JP
Japan
Prior art keywords
loop
circuit
modem
fault
terminal equipment
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
JP56012845A
Other languages
Japanese (ja)
Other versions
JPH0212064B2 (en
Inventor
Eiji Aranaka
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP56012845A priority Critical patent/JPS57129047A/en
Publication of JPS57129047A publication Critical patent/JPS57129047A/en
Publication of JPH0212064B2 publication Critical patent/JPH0212064B2/ja
Granted 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)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To prevent breakdown of a system in case a fault has occurred, by detecting ''off'' of a control signal transmitted from a MODEM, detaching a terminal and connecting a loop, in a loop connecting system containing a terminal equipment connected through the MODEM. CONSTITUTION:A data received from the loop side is sent to a circuit 9 through a control part 13, a level converting circuit 14 and a MODEM8, and also is sent to a terminal equipment through a MODEM and a trnsmission control part which are not shown in the figure. It is returned to the control device 13 from the terminal equipment in the reverse order and is sent out to the loop. In case a fault has occurred after the MODEM8, a control signal from the level converting circuit 14 becomes off, therefore, a NOR gate 16 and a detecting circuit 17 detect the fault, switch contacts a1, a2 to the dotted line side by driving a switching circuit 19, and release the loop connection.
JP56012845A 1981-02-02 1981-02-02 Loop connecting method Granted JPS57129047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012845A JPS57129047A (en) 1981-02-02 1981-02-02 Loop connecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012845A JPS57129047A (en) 1981-02-02 1981-02-02 Loop connecting method

Publications (2)

Publication Number Publication Date
JPS57129047A true JPS57129047A (en) 1982-08-10
JPH0212064B2 JPH0212064B2 (en) 1990-03-16

Family

ID=11816721

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012845A Granted JPS57129047A (en) 1981-02-02 1981-02-02 Loop connecting method

Country Status (1)

Country Link
JP (1) JPS57129047A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5464410U (en) * 1978-01-17 1979-05-08
JPS55150636A (en) * 1979-05-15 1980-11-22 Toshiba Corp Data transmitting unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5464410U (en) * 1978-01-17 1979-05-08
JPS55150636A (en) * 1979-05-15 1980-11-22 Toshiba Corp Data transmitting unit

Also Published As

Publication number Publication date
JPH0212064B2 (en) 1990-03-16

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