JPS54162402A - Multiple line control unit - Google Patents
Multiple line control unitInfo
- Publication number
- JPS54162402A JPS54162402A JP7088578A JP7088578A JPS54162402A JP S54162402 A JPS54162402 A JP S54162402A JP 7088578 A JP7088578 A JP 7088578A JP 7088578 A JP7088578 A JP 7088578A JP S54162402 A JPS54162402 A JP S54162402A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- control part
- terminals
- computer
- switching circuit
- 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
- Maintenance And Management Of Digital Transmission (AREA)
- Small-Scale Networks (AREA)
Abstract
PURPOSE: To make it possible to maintain required functions even in case of fault of a control part and exchange the faulty part without causing system-down by providing a connection line, which connects plural terminal control parts connected to a computer, and a switching circuit which can connects respective p busses mutually.
CONSTITUTION: In case that terminal control part 3a connected to a computer has become faulty and terminals 5a to 5n have become unavailable, a back-up command is issued from the computer to control part 3b through M bus 2, and connection line 6 is used to disconnect control part 3a and P bus 4a. Then, P bus 4b is used to operate switching circuit 7, and P busses 4b and 4a are connected, and control part 3b operates required minimum fumctions of terminals 5aa to 5an. In case that terminals 5aa to 5an have become faulty and P bus 4a has become unavailable, the connection between control part 3a and P bus 4a is disconnected, and switching circuit 7 is left in the non-connection state, and both ends of the P bus are disconnected, thereby operating only faultless parts.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7088578A JPS54162402A (en) | 1978-06-14 | 1978-06-14 | Multiple line control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7088578A JPS54162402A (en) | 1978-06-14 | 1978-06-14 | Multiple line control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54162402A true JPS54162402A (en) | 1979-12-24 |
Family
ID=13444425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7088578A Pending JPS54162402A (en) | 1978-06-14 | 1978-06-14 | Multiple line control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54162402A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5158002A (en) * | 1974-11-18 | 1976-05-21 | Kyodo Tsushinsha |
-
1978
- 1978-06-14 JP JP7088578A patent/JPS54162402A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5158002A (en) * | 1974-11-18 | 1976-05-21 | Kyodo Tsushinsha |
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