JPS5731249A - Circuit switching system of loop type data transmitter - Google Patents

Circuit switching system of loop type data transmitter

Info

Publication number
JPS5731249A
JPS5731249A JP10503980A JP10503980A JPS5731249A JP S5731249 A JPS5731249 A JP S5731249A JP 10503980 A JP10503980 A JP 10503980A JP 10503980 A JP10503980 A JP 10503980A JP S5731249 A JPS5731249 A JP S5731249A
Authority
JP
Japan
Prior art keywords
code
transmission line
time
station
transmission
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
JP10503980A
Other languages
Japanese (ja)
Other versions
JPS6046583B2 (en
Inventor
Akiji Hasegawa
Takayuki Fujito
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 JP10503980A priority Critical patent/JPS6046583B2/en
Publication of JPS5731249A publication Critical patent/JPS5731249A/en
Publication of JPS6046583B2 publication Critical patent/JPS6046583B2/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 prevent the occurrence of a dead lock system breakdown, by eliminating the code already transmitted by a faulty station out of a transmission line in case a fualt arises at a station and then securing a by-pass state for the corresponding station. CONSTITUTION:Each constant is set to satisfy a relation of (T2-T1)>(tL+tS), where tL is the time during which a code has a circulation along a loop transmission line 6, tS is the time of transmission or reception of a code (either one of the selection code, replay code and command code) to or from a transmission line, and T1 and T2 are time constants of monostable multivibrators 11 and 11-1 respectively. When a fault arises at a device 2-1, the S2-1 is switched to switch only the transmission side toward a by-pass line. Thus the circuit is broken, and the codes on the circuits are all erased during time limit T2-T1. After this, the S1-1 is switched to eliminate the conventional dead lock system breakdown. Then a perfect by-pass state is ensured.
JP10503980A 1980-08-01 1980-08-01 Line switching method for loop data transmission equipment Expired JPS6046583B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10503980A JPS6046583B2 (en) 1980-08-01 1980-08-01 Line switching method for loop data transmission equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10503980A JPS6046583B2 (en) 1980-08-01 1980-08-01 Line switching method for loop data transmission equipment

Publications (2)

Publication Number Publication Date
JPS5731249A true JPS5731249A (en) 1982-02-19
JPS6046583B2 JPS6046583B2 (en) 1985-10-16

Family

ID=14396856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10503980A Expired JPS6046583B2 (en) 1980-08-01 1980-08-01 Line switching method for loop data transmission equipment

Country Status (1)

Country Link
JP (1) JPS6046583B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6384229A (en) * 1986-09-29 1988-04-14 Hitachi Ltd Retrievel system for faulted branch line in line concentrator
DE112011101834T5 (en) 2010-05-29 2013-03-14 Suzuki Motor Corporation toolbox

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6384229A (en) * 1986-09-29 1988-04-14 Hitachi Ltd Retrievel system for faulted branch line in line concentrator
DE112011101834T5 (en) 2010-05-29 2013-03-14 Suzuki Motor Corporation toolbox

Also Published As

Publication number Publication date
JPS6046583B2 (en) 1985-10-16

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