JPS5414104A - Privacy circuit for telephone - Google Patents
Privacy circuit for telephoneInfo
- Publication number
- JPS5414104A JPS5414104A JP7955077A JP7955077A JPS5414104A JP S5414104 A JPS5414104 A JP S5414104A JP 7955077 A JP7955077 A JP 7955077A JP 7955077 A JP7955077 A JP 7955077A JP S5414104 A JPS5414104 A JP S5414104A
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- privacy circuit
- privacy
- circuit
- paralleley
- 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
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)
Abstract
PURPOSE:To improve the privacy performance for a plurality of telephone sets connected paralleley, by inserting non-linear elements and capacitors of small capacitance to the telephone line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7955077A JPS5414104A (en) | 1977-07-05 | 1977-07-05 | Privacy circuit for telephone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7955077A JPS5414104A (en) | 1977-07-05 | 1977-07-05 | Privacy circuit for telephone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5414104A true JPS5414104A (en) | 1979-02-02 |
Family
ID=13693106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7955077A Pending JPS5414104A (en) | 1977-07-05 | 1977-07-05 | Privacy circuit for telephone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5414104A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4332983A (en) * | 1980-10-27 | 1982-06-01 | Hosein Vakili | Telephone privacy controller |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081604A (en) * | 1973-11-21 | 1975-07-02 |
-
1977
- 1977-07-05 JP JP7955077A patent/JPS5414104A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081604A (en) * | 1973-11-21 | 1975-07-02 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4332983A (en) * | 1980-10-27 | 1982-06-01 | Hosein Vakili | Telephone privacy controller |
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