JPS5617549A - Secret connecting system - Google Patents
Secret connecting systemInfo
- Publication number
- JPS5617549A JPS5617549A JP9337479A JP9337479A JPS5617549A JP S5617549 A JPS5617549 A JP S5617549A JP 9337479 A JP9337479 A JP 9337479A JP 9337479 A JP9337479 A JP 9337479A JP S5617549 A JPS5617549 A JP S5617549A
- Authority
- JP
- Japan
- Prior art keywords
- center
- call
- circuit
- telephone
- called memory
- 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
Links
- 230000004044 response Effects 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Debugging And Monitoring (AREA)
Abstract
PURPOSE:To secure the perfect connection and protection of the secret, by connecting the recall terminal which is decided previously in response to the called memory to the central processor. CONSTITUTION:A telephone call is given to central processor 80 from maintenance center 20 via exchange circuit network 30 and then rung off after a fixed time. Then this telephone call from center 20 is detected by call detecting circuit 62 in access right checking circuit 60 and at the same time stored in called memory FF63. After this , automatic return telephone circuit 61 transmits the telephone number of center 20 which is known previously, i.e., the telephone number of the called terminal which is decided previously to network control unit 40 via number information signal group 43 and in response to the called memory. And the second call is given to center 20. When the call is connected, connection end signal 44 is turned on. And then data set ready signal 52 is turned on. Accordingly, output 67 is produced at AND circuit 65 to start the communication between processor 80 and center 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9337479A JPS5617549A (en) | 1979-07-23 | 1979-07-23 | Secret connecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9337479A JPS5617549A (en) | 1979-07-23 | 1979-07-23 | Secret connecting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5617549A true JPS5617549A (en) | 1981-02-19 |
| JPS6213867B2 JPS6213867B2 (en) | 1987-03-30 |
Family
ID=14080521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9337479A Granted JPS5617549A (en) | 1979-07-23 | 1979-07-23 | Secret connecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5617549A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01224858A (en) * | 1988-03-04 | 1989-09-07 | M M J:Kk | Illegal access preventing method for computer and board device used for it |
| JPH0290335A (en) * | 1988-09-28 | 1990-03-29 | Hitachi Ltd | Remote operation control method for computer systems |
-
1979
- 1979-07-23 JP JP9337479A patent/JPS5617549A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01224858A (en) * | 1988-03-04 | 1989-09-07 | M M J:Kk | Illegal access preventing method for computer and board device used for it |
| JPH0290335A (en) * | 1988-09-28 | 1990-03-29 | Hitachi Ltd | Remote operation control method for computer systems |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6213867B2 (en) | 1987-03-30 |
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