JPS6489736A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS6489736A
JPS6489736A JP24607287A JP24607287A JPS6489736A JP S6489736 A JPS6489736 A JP S6489736A JP 24607287 A JP24607287 A JP 24607287A JP 24607287 A JP24607287 A JP 24607287A JP S6489736 A JPS6489736 A JP S6489736A
Authority
JP
Japan
Prior art keywords
line
station
recognized
checking
maintenance
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
JP24607287A
Other languages
Japanese (ja)
Inventor
Hirotomo Kojima
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP24607287A priority Critical patent/JPS6489736A/en
Publication of JPS6489736A publication Critical patent/JPS6489736A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To judge the reason of a down without reducing a transmission efficiency at the time of the down due to checking and maintenance by sending the effect to give an initiative for a prescribed period for the station which is recognized to be an OFF line and when the response is made, giving the initiative to the station. CONSTITUTION:At respective stations 2-1-2-n judge the switching condition of a line switching means 6 and send the effect of the ON line declaration and the OFF line declaration to a transmission line 1. The ON line declaration and the OFF line declaration are received and it is recognized in which condition of the ON line and OFF line respective stations 2-1-2-n are. Further, the effect that a token is given for a prescribed period to the station which is recognized to be the OFF line is sent, and at the time of the response, the token is given. Thus, it can be without fail recognized by checking and maintenance at respective stations 2-1-2-n that the OFF line is obtained, and when the transfer of the token is executed and the response is not returned, it can be found out except the checking and maintenance that the station is down. Consequently, it can be clearly recognized whether or not the OFF line of the station is caused by the checking and maintenance or a fault, etc.
JP24607287A 1987-09-30 1987-09-30 Data transmission system Pending JPS6489736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24607287A JPS6489736A (en) 1987-09-30 1987-09-30 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24607287A JPS6489736A (en) 1987-09-30 1987-09-30 Data transmission system

Publications (1)

Publication Number Publication Date
JPS6489736A true JPS6489736A (en) 1989-04-04

Family

ID=17143051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24607287A Pending JPS6489736A (en) 1987-09-30 1987-09-30 Data transmission system

Country Status (1)

Country Link
JP (1) JPS6489736A (en)

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