JPS55134416A - Cross call cable switch - Google Patents
Cross call cable switchInfo
- Publication number
- JPS55134416A JPS55134416A JP4050479A JP4050479A JPS55134416A JP S55134416 A JPS55134416 A JP S55134416A JP 4050479 A JP4050479 A JP 4050479A JP 4050479 A JP4050479 A JP 4050479A JP S55134416 A JPS55134416 A JP S55134416A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- cable
- contact
- circuit
- cross call
- 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
Abstract
PURPOSE: To make it possible to maintain only the faulty system without removal of a cable and to restrain many interrupts for transient operations to only one, by providing a diode group and a relay connected to the cable for cross call.
CONSTITUTION: At a system fault time, switch 400-1 breaks the faulty system power source to inactivate relay 300-1, and contact 300-1b is closed to earth cable 200 for cross call through diodes D11WD1n. At this time, if break of power source Vc1 of input circuit 4-1 and power source Vc2 of signal distributor 3-1n is sequence, contact 300-1b is first closed even if the output of circuit 4-1 is unstable. Then, even if power is supplied again to input a testing false interrupt signal to circuit 4-1, no interrupt input is caused to computer 2-2 in another system. Next, when the fault of system 1-1 is recovered, power source Vc2 is made to activate relay 300-1, and contact 300-1b is opened, and as the result, cable 200 is used effectively again.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4050479A JPS55134416A (en) | 1979-04-04 | 1979-04-04 | Cross call cable switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4050479A JPS55134416A (en) | 1979-04-04 | 1979-04-04 | Cross call cable switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55134416A true JPS55134416A (en) | 1980-10-20 |
Family
ID=12582375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4050479A Pending JPS55134416A (en) | 1979-04-04 | 1979-04-04 | Cross call cable switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55134416A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5388543A (en) * | 1977-01-14 | 1978-08-04 | Hitachi Ltd | Information processor |
JPS53109448A (en) * | 1977-03-07 | 1978-09-25 | Hitachi Ltd | Information processor |
-
1979
- 1979-04-04 JP JP4050479A patent/JPS55134416A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5388543A (en) * | 1977-01-14 | 1978-08-04 | Hitachi Ltd | Information processor |
JPS53109448A (en) * | 1977-03-07 | 1978-09-25 | Hitachi Ltd | Information processor |
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