JPS5440406B2 - - Google Patents
Info
- Publication number
- JPS5440406B2 JPS5440406B2 JP3247476A JP3247476A JPS5440406B2 JP S5440406 B2 JPS5440406 B2 JP S5440406B2 JP 3247476 A JP3247476 A JP 3247476A JP 3247476 A JP3247476 A JP 3247476A JP S5440406 B2 JPS5440406 B2 JP S5440406B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
- H04M1/70—Lock-out or secrecy arrangements in party-line systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247476A JPS52116005A (en) | 1976-03-26 | 1976-03-26 | Privacy talk circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247476A JPS52116005A (en) | 1976-03-26 | 1976-03-26 | Privacy talk circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52116005A JPS52116005A (en) | 1977-09-29 |
| JPS5440406B2 true JPS5440406B2 (no) | 1979-12-03 |
Family
ID=12359965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3247476A Granted JPS52116005A (en) | 1976-03-26 | 1976-03-26 | Privacy talk circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS52116005A (no) |
-
1976
- 1976-03-26 JP JP3247476A patent/JPS52116005A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52116005A (en) | 1977-09-29 |