JPS6489736A - Data transmission system - Google Patents
Data transmission systemInfo
- 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
Links
Landscapes
- Small-Scale Networks (AREA)
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.
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) |
-
1987
- 1987-09-30 JP JP24607287A patent/JPS6489736A/en active Pending
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