JPS5679552A - Loop back system for duplex loop transmission system - Google Patents

Loop back system for duplex loop transmission system

Info

Publication number
JPS5679552A
JPS5679552A JP15647279A JP15647279A JPS5679552A JP S5679552 A JPS5679552 A JP S5679552A JP 15647279 A JP15647279 A JP 15647279A JP 15647279 A JP15647279 A JP 15647279A JP S5679552 A JPS5679552 A JP S5679552A
Authority
JP
Japan
Prior art keywords
loop back
station
loop
post stage
duplex
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
JP15647279A
Other languages
Japanese (ja)
Other versions
JPS5941620B2 (en
Inventor
Masahiro Matsumoto
Shogo Nasu
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15647279A priority Critical patent/JPS5941620B2/en
Publication of JPS5679552A publication Critical patent/JPS5679552A/en
Publication of JPS5941620B2 publication Critical patent/JPS5941620B2/en
Expired 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

Abstract

PURPOSE:To enable general loop back instruction, by interrupting to the station at the post stage, even at loop back, and giving the function releasing the loop back to the station through the normal reception of the signal in loop back from the station of the post stage. CONSTITUTION:When general loop back instruction is received from a transmission line 3 via a receiver 21a, a decoder 27c interprete it, and a switching control circuit 27a gives a switching signal 32a to switching circuits 26c and 26d so that a transmission/reception control circuit 24 is inserted between the output of the receiver 21a and the input of transmission 22a, 22b. Thus, the general loop back instruction is in loop back through the transmitter 22b of a station 2a and transmitted to the station at the post stage with the transmitter 22a.
JP15647279A 1979-12-03 1979-12-03 Loopback method of dual loop transmission system Expired JPS5941620B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15647279A JPS5941620B2 (en) 1979-12-03 1979-12-03 Loopback method of dual loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15647279A JPS5941620B2 (en) 1979-12-03 1979-12-03 Loopback method of dual loop transmission system

Publications (2)

Publication Number Publication Date
JPS5679552A true JPS5679552A (en) 1981-06-30
JPS5941620B2 JPS5941620B2 (en) 1984-10-08

Family

ID=15628490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15647279A Expired JPS5941620B2 (en) 1979-12-03 1979-12-03 Loopback method of dual loop transmission system

Country Status (1)

Country Link
JP (1) JPS5941620B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848548A (en) * 1981-09-18 1983-03-22 Fujitsu Ltd Transmission line folding system
JPS58138146A (en) * 1982-02-10 1983-08-16 Nippon Telegr & Teleph Corp <Ntt> Folding control method of loop transmission system
EP0091129A2 (en) * 1982-04-07 1983-10-12 Hitachi, Ltd. Reconfiguration control method for a loop-type data network
JPS5977739A (en) * 1982-10-27 1984-05-04 Hitachi Ltd Loop network system of duplex system
JPS59209927A (en) * 1983-05-06 1984-11-28 デンプスタ−・システムズ・インコ−ポレイテツド Hoist mechanism for truck or trailer type automobile
JPS6169234A (en) * 1984-09-04 1986-04-09 Oki Electric Ind Co Ltd Loop transmitter and control system for countermeasure to loop transmission fault
JPS61283254A (en) * 1985-06-10 1986-12-13 Canon Inc Transmission control system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848548A (en) * 1981-09-18 1983-03-22 Fujitsu Ltd Transmission line folding system
JPS58138146A (en) * 1982-02-10 1983-08-16 Nippon Telegr & Teleph Corp <Ntt> Folding control method of loop transmission system
EP0091129A2 (en) * 1982-04-07 1983-10-12 Hitachi, Ltd. Reconfiguration control method for a loop-type data network
US4530085A (en) * 1982-04-07 1985-07-16 Hitachi, Ltd. Reconfiguration control method for a loop-type data network
EP0091129B1 (en) * 1982-04-07 1987-08-12 Hitachi, Ltd. Reconfiguration control method for a loop-type data network
JPS5977739A (en) * 1982-10-27 1984-05-04 Hitachi Ltd Loop network system of duplex system
JPH0149066B2 (en) * 1982-10-27 1989-10-23 Hitachi Ltd
JPS59209927A (en) * 1983-05-06 1984-11-28 デンプスタ−・システムズ・インコ−ポレイテツド Hoist mechanism for truck or trailer type automobile
JPS6169234A (en) * 1984-09-04 1986-04-09 Oki Electric Ind Co Ltd Loop transmitter and control system for countermeasure to loop transmission fault
JPH0695687B2 (en) * 1984-09-04 1994-11-24 沖電気工業株式会社 Loop transmission failure countermeasure control method
JPS61283254A (en) * 1985-06-10 1986-12-13 Canon Inc Transmission control system

Also Published As

Publication number Publication date
JPS5941620B2 (en) 1984-10-08

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