JPS5684052A - Automatic transmission-line switching system - Google Patents

Automatic transmission-line switching system

Info

Publication number
JPS5684052A
JPS5684052A JP16182979A JP16182979A JPS5684052A JP S5684052 A JPS5684052 A JP S5684052A JP 16182979 A JP16182979 A JP 16182979A JP 16182979 A JP16182979 A JP 16182979A JP S5684052 A JPS5684052 A JP S5684052A
Authority
JP
Japan
Prior art keywords
error rate
terminal station
stand
transmission line
receiving terminal
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
JP16182979A
Other languages
Japanese (ja)
Other versions
JPS5837743B2 (en
Inventor
Sadao Ifukuro
Takashi Kihara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16182979A priority Critical patent/JPS5837743B2/en
Publication of JPS5684052A publication Critical patent/JPS5684052A/en
Publication of JPS5837743B2 publication Critical patent/JPS5837743B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Abstract

PURPOSE:To prevent switching operation from being repeated when transmission lines are switched by monitoring the error rate of an in-use transmission line, by providing two threshold values of the error rate to be changed over and by changing threshold values of the error rate when it is changed over to a stand-by transmission line. CONSTITUTION:While an in-use transmission line is provided between transmitting terminal station 2a and receiving terminal station 4a, a stand-by transmission line is provided between transmitting terminal station 2b and receiving terminal station 4b and receiving terminal station 4a is provided with a method of measuring error rates of transmission lines. Firstly, the threshold value of the error rate is set to 10<-6> and if the error rate of the stand-by system reaches 10<-6> or more, a switching indication signal is sent to switch control part 6, which applies a switching control signal to switch parts 1 and 5 to change the in-use system over to the stand-by system. This switching control signal is applied to receiving terminal station 4a and the threshold value of the error rate is changed over to 10<-9> to measure the error rate of the monitoring pattern of the in-use system, but even if the error rate changes to about 10<-6>, the switching operation is not performed and when it decreases down to 10<-9> or less, the switching indication signal is sent to control part 6 to changes the stand-by system over to the in-use system.
JP16182979A 1979-12-13 1979-12-13 Automatic transmission line switching method Expired JPS5837743B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16182979A JPS5837743B2 (en) 1979-12-13 1979-12-13 Automatic transmission line switching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16182979A JPS5837743B2 (en) 1979-12-13 1979-12-13 Automatic transmission line switching method

Publications (2)

Publication Number Publication Date
JPS5684052A true JPS5684052A (en) 1981-07-09
JPS5837743B2 JPS5837743B2 (en) 1983-08-18

Family

ID=15742699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16182979A Expired JPS5837743B2 (en) 1979-12-13 1979-12-13 Automatic transmission line switching method

Country Status (1)

Country Link
JP (1) JPS5837743B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174042A (en) * 1983-03-23 1984-10-02 Hitachi Ltd Detecting circuit for pcm code error factor
EP0305994A2 (en) * 1987-08-31 1989-03-08 Fujitsu Limited Data communication system having means for switching between main and stand-by apparatuses
JPH05167588A (en) * 1991-12-13 1993-07-02 Yamatake Honeywell Co Ltd Abnormality detection system of channel in local area network

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174042A (en) * 1983-03-23 1984-10-02 Hitachi Ltd Detecting circuit for pcm code error factor
EP0305994A2 (en) * 1987-08-31 1989-03-08 Fujitsu Limited Data communication system having means for switching between main and stand-by apparatuses
US4831617A (en) * 1987-08-31 1989-05-16 Fujitsu Limited Data communication system having means for switching between main and stand-by apparatuses
JPH05167588A (en) * 1991-12-13 1993-07-02 Yamatake Honeywell Co Ltd Abnormality detection system of channel in local area network

Also Published As

Publication number Publication date
JPS5837743B2 (en) 1983-08-18

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